2024-03-28T15:32:53Z
https://pub.uni-bielefeld.de/oai
oai:pub.uni-bielefeld.de:1594903
2018-07-24T12:58:13Z
journal_article
doc-type:article
Nonlinear diffusion through large complex networks containing regular subgraphs
Volchenkov, Dimitry
Blanchard, Philippe
networks and
structures and organization in complex systems
genealogical trees
diffusion
Volchenkov D, Blanchard P. Nonlinear diffusion through large complex networks containing regular subgraphs. <em>JOURNAL OF STATISTICAL PHYSICS</em>. 2007;127(4):677-697.
Transport through generalized trees is considered. Trees contain the simple nodes and supernodes, either well-structured regular subgraphs or those with many triangles. We observe a superdiffusion for the highly connected nodes while it is Brownian for the rest of the nodes. Transport within a supernode is affected by the finite size effects vanishing as N -> infinity. For the even dimensions of space, d = 2, 4, 6,..., the finite size effects break down the perturbation theory at small scales and can be regularized by using the heat-kernel expansion.
SPRINGER/PLENUM PUBLISHERS
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1594903
eng
info:eu-repo/semantics/altIdentifier/doi/10.1007/s10955-007-9313-1
info:eu-repo/semantics/altIdentifier/issn/0022-4715
info:eu-repo/semantics/altIdentifier/issn/1572-9613
info:eu-repo/semantics/altIdentifier/wos/000245899700002
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1594907
2018-07-24T12:58:50Z
journal_article
doc-type:article
Single-active-electron ionization of C-60 in intense laser pulses to high charge states
Jaron-Becker, A.
Becker, A.
Faisal, Farhad
Jaron-Becker A, Becker A, Faisal F. Single-active-electron ionization of C-60 in intense laser pulses to high charge states. <em>JOURNAL OF CHEMICAL PHYSICS</em>. 2007;126(12):124310.
Sequential ionization of the C-60 fullerene to high charge states in ultrashort intense laser pulses is investigated within the strong-field S-matrix approach. Ion yields are calculated and saturation intensities are determined for a broad range of laser wavelengths between 395 and 1800 nm at different pulse lengths. Comparisons of the S-matrix predictions for the saturation intensities with recent experimental data are in an overall satisfactory agreement, indicating that saturation of ionization of this complex molecule can be well described using the single-active-electron approach. The analysis of the results shows that the contributions from the h(u)-highest occupied molecular orbital to the ion yields dominate as compared to those from the inner valence shells h(g) and g(g). Finally, it is demonstrated that the suppression of ionization of C-60 and its ions, as observed in experiments, can be interpreted within the present theory as due to the finite cage size of the fullerenes and a multi-slit-like interference effect between partial waves emitted from the different nuclei of the fullerenes. (c) 2007 American Institute of Physics.
AMER INST PHYSICS
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1594907
eng
info:eu-repo/semantics/altIdentifier/doi/10.1063/1.2712844
info:eu-repo/semantics/altIdentifier/issn/0021-9606
info:eu-repo/semantics/altIdentifier/wos/000245317800027
info:eu-repo/semantics/altIdentifier/pmid/17411126
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1594917
2018-07-24T12:58:56Z
journal_article
doc-type:article
Compressed suffix tree - a basis for genome-scale sequence analysis
Välimäki, Niko
Gerlach, Wolfgang
Dixit, Kashyap
Mäkinen, Veli
Välimäki N, Gerlach W, Dixit K, Mäkinen V. Compressed suffix tree - a basis for genome-scale sequence analysis. <em>BIOINFORMATICS</em>. 2007;23(5):629-630.
OXFORD UNIV PRESS
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1594917
eng
info:eu-repo/semantics/altIdentifier/doi/10.1093/bioinformatics/btl681
info:eu-repo/semantics/altIdentifier/issn/1367-4803
info:eu-repo/semantics/altIdentifier/issn/1460-2059
info:eu-repo/semantics/altIdentifier/wos/000245350200015
info:eu-repo/semantics/altIdentifier/pmid/17237063
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1594923
2018-07-24T12:58:43Z
journal_article
doc-type:article
Syntheses, Structures, Electrochemistry and Optical Properties of Alkyne-Functionalized 1,3,2-Diazaboroles and 1,3,2-Diazaborolidines
Weber, Lothar
Penner, A.
Domke, Imme
Stammler, Hans-Georg
Neumann, Beate
diazaborolidines
cyclovoltammetry
luminescence
diazaboroles
boron
alkynes
Weber L, Penner A, Domke I, Stammler H-G, Neumann B. Syntheses, Structures, Electrochemistry and Optical Properties of Alkyne-Functionalized 1,3,2-Diazaboroles and 1,3,2-Diazaborolidines. <em>Zeitschrift für Anorganische und Allgemeine Chemie</em>. 2007;633(4):563-569.
The reaction of 2-bromo-1,3-ditert-butyl-2,3-dihydro-1-H-1,3,2-diazaborole (3) with lithiated tert-butyl-acetylene and lithiated phenylacetylene affords the 2-alkynyl-functionalized 1,3,2-di-azaboroles 4 and 5 as a thermolabile colorless oil (4) or a solid (5). Similarly 2-bromo-1,3-diethyl-2,3-dihydro-1H-1,3,2-benzodiazaborole (6) was converted into the crystalline 2-alkynyl-benzo-1,3,2-diazaboroles 7 and 8 by treatment with LiC equivalent to C-tBu or LiC equivalent to CPh, respectively 2-Ethynyl-1,3-ditert-butyl-2,3-dihydro-1H-1,3,2-diazaborole (2) was metalated with test-butyl-lithium and subsequently coupled with 2-bromo-1.3,-ditert-butyl-2,3-dihydro-1H-1,3,2-diazaborole (3) to afford bis(1,3-ditert-butyl-2,3-dihydro-1H-1,3,2-di-azaborol-2-yl)acetylene (9) as thermolabile colorless crystals. Analogously coupling of the lithiated species with 6 or with 2-bromo-1,3-ditert-butyl-1,3,2-diazaborolidine (11) gave the unsymmetrically substituted acetylenes 10 or 12, respectively, as colorless solids. Compounds 4, 5, 7-10 and 12 are characterized by elemental analyses and spectroscopy (IR, H-1-, B-11{H-1}, C-13{H-1}-NMR, MS). The molecular structures of 5, 8 and 9 were elucidated by X-ray diffraction analyses.
Wiley
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1594923
eng
info:eu-repo/semantics/altIdentifier/doi/10.1002/zaac.200600351
info:eu-repo/semantics/altIdentifier/issn/0044-2313
info:eu-repo/semantics/altIdentifier/issn/1521-3749
info:eu-repo/semantics/altIdentifier/wos/000245182100011
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1594930
2018-07-24T12:58:43Z
journal_article
doc-type:article
FMR study of thin films of Co2Cr0.6Fe0.4Al and Co2MnSi Heusler alloys
Rameev, B. Z.
Yildiz, F.
Kazan, S.
Aktas, B.
Rata, D.
Buergler, D.
Gruenberg, P.
Schneider, K. M.
Kaemmerer, S.
Reiss, Günter ; https://orcid.org/0000-0002-0918-5940
Hütten, Andreas
Rameev BZ, Yildiz F, Kazan S, et al. FMR study of thin films of Co2Cr0.6Fe0.4Al and Co2MnSi Heusler alloys. <em>PHYSICS OF METALS AND METALLOGRAPHY</em>. 2006;102(4):357-365.
The method of ferromagnetic resonance (FMR) was used to study magnetic properties of thin films of half-metallic ferromagnetic Heusler alloys Co2Cr0.6Fe0.4Al and Co2MnSi depending on the film thickness and the presence or absence of a vanadium buffer layer. It is shown that the FMR method is a highly efficient technique for studying nanoscale magnetic properties of thin films, especially for the investigation of their magnetic inhomogeneities and anisotropy. Samples of Co2Cr0.6Fe0.4Al and Co2MnSi were prepared by magnetron-sputtering deposition on substrates of single-crystal silicon dioxide (SiO2) with an orientation (100). It has been shown that the magnetic properties of thin Co2Cr0.6Fe0.4Al films strongly depend on both the film thickness (25 or 100 nm) and the presence of an intermediate vanadium layer (50 nm). Well-resolved spin-wave modes were observed in the sample 100 nm thick without a vanadium buffer layer, which made it possible to determine the parameter of spin stiffness D for this ferromagnet. Two series of thin films of Co2MnSi have also been studied, which were prepared on a buffer layer of vanadium (42 nm thick): (1) with various thicknesses (4-100 nm) and a fixed annealing temperature (450 degrees C) and (2) with a fixed thickness (80 nm) and various annealing temperatures (425-550 degrees C). It has been shown that in the series of Co2MnSi films with a variable thickness (4-100 nm) the greatest value of magnetization is reached for a film with a thickness of 61 nm. The investigations of the other series of films, which were annealed at various temperatures, show that to achieve both a greater magnetization and a better structural homogeneity, annealing at temperatures T >= 450 degrees C is required. In addition, low-intensity spin-waves were observed in some samples with thicknesses of 100 and 61 nm, which made it possible to estimate the spin-stiffness parameter D for the Co2MnSi Heusler alloy as well.
MAIK NAUKA/INTERPERIODICA/SPRINGER
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1594930
eng
info:eu-repo/semantics/altIdentifier/doi/10.1134/S0031918X06100036
info:eu-repo/semantics/altIdentifier/issn/0031-918X
info:eu-repo/semantics/altIdentifier/issn/1555-6190
info:eu-repo/semantics/altIdentifier/wos/000245712800003
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1594951
2018-07-24T12:57:55Z
journal_article
doc-type:article
Kramers escape rate for a charged particle in a magnetic field
Filliger, R.
Reimann, Peter
Filliger R, Reimann P. Kramers escape rate for a charged particle in a magnetic field. <em>EPL</em>. 2007;77(3): 30008.
We determine and discuss the escape rate of a charged particle from a metastable state in the presence of Lorentz forces due to a time-independent magnetic field. Compared to the case without magnetic field, there is one specific direction along which a magnetic field does not modify the rate at all, independently of its absolute value. Along any other direction, the magnetic field always leads to a reduction of the escape rate. The reduction depends non-uniformly on the orientation of the field and for strong magnetic fields a critical cone is identified where the rate behaves fundamentally different depending on whether the field lies inside or outside the cone. Though the exponentially leading Arrhenius-factor is completely independent of the magnetic field, the rate suppression via the pre-exponential factor can become arbitrarily strong for specific directions of the sufficiently large magnetic field. In the most general case of an inhomogeneous magnetic field, only its value in the activated state ( saddle point of the potential) is of relevance for the escape rate.
EDP SCIENCES S A
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1594951
eng
info:eu-repo/semantics/altIdentifier/doi/10.1209/0295-5075/77/30008
info:eu-repo/semantics/altIdentifier/issn/0295-5075
info:eu-repo/semantics/altIdentifier/issn/1286-4854
info:eu-repo/semantics/altIdentifier/wos/000245743000008
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1594959
2018-07-24T12:58:43Z
journal_article
doc-type:article
ddc:580
journal_articleFtxt
open_access
Regulation of gene expression by photosynthetic signals triggered through modified CO2 availability
Wormuth, Dennis
Baier, Margarete
Kandlbinder, Andrea
Scheibe, Renate
Hartung, Wolfram
Dietz, Karl-Josef
ddc:580
Wormuth D, Baier M, Kandlbinder A, Scheibe R, Hartung W, Dietz K-J. Regulation of gene expression by photosynthetic signals triggered through modified CO2 availability. <em>BMC PLANT BIOLOGY</em>. 2006;6(1): 15.
Background:
To coordinate metabolite fluxes and energy availability, plants adjust metabolism and gene expression to environmental changes through employment of interacting signalling pathways.
Results:
Comparing the response of Arabidopsis wild-type plants with that of the mutants adg1, pgr1 and vtc1 upon altered CO2-availability, the regulatory role of the cellular energy status, photosynthetic electron transport, the redox state and concentration of ascorbate and glutathione and the assimilatory force was analyzed in relation to the transcript abundance of stress-responsive nuclear encoded genes and psaA and psbA encoding the reaction centre proteins of photosystem I and II, respectively. Transcript abundance of Bap1, Stp1, psaA and psaB was coupled with seven metabolic parameters. Especially for psaA and psaB, the complex analysis demonstrated that the assumed PQ-dependent redox control is subordinate to signals linked to the relative availability of 3-PGA and DHAP, which define the assimilatory force. For the transcripts of sAPx and Csd2 high correlations with the calculated redox state of NADPH were observed in pgr1, but not in wild-type, suggesting that in wild-type plants signals depending on thylakoid acidification overlay a predominant redox-signal. Strongest correlation with the redox state of ascorbate was observed for 2CPA, whose transcript abundance regulation however was almost insensitive to the ascorbate content demonstrating dominance of redox regulation over metabolite sensing.
Conclusion:
In the mutants, signalling pathways are partially uncoupled, demonstrating dominance of metabolic control of photoreaction centre expression over sensing the redox state of the PQ-pool. The balance between the cellular redox poise and the energy signature regulates sAPx and Csd2 transcript abundance, while 2CPA expression is primarily redox-controlled.
BIOMED CENTRAL LTD
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://nbn-resolving.org/urn:nbn:de:0070-pub-15949590
https://pub.uni-bielefeld.de/record/1594959
https://pub.uni-bielefeld.de/download/1594959/2311109
eng
info:eu-repo/semantics/altIdentifier/doi/10.1186/1471-2229-6-15
info:eu-repo/semantics/altIdentifier/issn/1471-2229
info:eu-repo/semantics/altIdentifier/wos/000245250900001
info:eu-repo/semantics/altIdentifier/pmid/16916444
info:eu-repo/semantics/openAccess
https://rightsstatements.org/vocab/InC/1.0/
oai:pub.uni-bielefeld.de:1594967
2018-07-24T12:58:56Z
journal_article
doc-type:article
Time-to-space mapping in a gas medium for the temporal characterization of vacuum-ultraviolet pulses
Cunovic, Stefan
Müller, Norbert
Kalms, R.
Krikunova, M.
Wieland, M.
Drescher, Markus
Maltezopoulos, Th.
Fruhling, U.
Redlin, H.
Plonjes-Palm, E.
Feldhaus, J.
Cunovic S, Müller N, Kalms R, et al. Time-to-space mapping in a gas medium for the temporal characterization of vacuum-ultraviolet pulses. <em>APPLIED PHYSICS LETTERS</em>. 2007;90(12):121112.
The authors introduce a method for cross correlating vacuum-ultraviolet with near-infrared femtosecond light pulses in a perpendicular geometry. Photoelectrons generated in an atomic gas by laser-assisted photoionization are used to create a two-dimensional image of the cross-correlation volume, thereby mapping time onto a space coordinate. Thus, information about pulse duration and relative timing between the pulses can be obtained without the need to scan an optical delay line. First tests using vacuum-ultraviolet pulses from the free-electron laser at the Deutsches Elektronen Synchrotron set an upper limit for their temporal jitter with respect to external optical laser pulses. (c) 2007 American Institute of Physics.
AMER INST PHYSICS
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1594967
eng
info:eu-repo/semantics/altIdentifier/doi/10.1063/1.2714999
info:eu-repo/semantics/altIdentifier/issn/0003-6951
info:eu-repo/semantics/altIdentifier/wos/000245135800012
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1594980
2018-07-24T12:58:43Z
journal_article
doc-type:article
Biochemical applications of surface-enhanced infrared absorption spectroscopy
Ataka, Kenichi
Heberle, Joachim
membrane
self-assembled monolayer
electron transfer
protein
FTIR
Ataka K, Heberle J. Biochemical applications of surface-enhanced infrared absorption spectroscopy. <em>ANALYTICAL AND BIOANALYTICAL CHEMISTRY</em>. 2007;388(1):47-54.
An overview is presented on the application of surface-enhanced infrared absorption (SEIRA) spectroscopy to biochemical problems. Use of SEIRA results in high surface sensitivity by enhancing the signal of the adsorbed molecule by approximately two orders of magnitude and has the potential to enable new studies, from fundamental aspects to applied sciences. This report surveys studies of DNA and nucleic acid adsorption to gold surfaces, development of immunoassays, electron transfer between metal electrodes and proteins, and protein-protein interactions. Because signal enhancement in SEIRA uses surface properties of the nano-structured metal, the biomaterial must be tethered to the metal without hampering its functionality. Because many biochemical reactions proceed vectorially, their functionality depends on proper orientation of the biomaterial. Thus, surface-modification techniques are addressed that enable control of the proper orientation of proteins on the metal surface.
SPRINGER HEIDELBERG
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1594980
eng
info:eu-repo/semantics/altIdentifier/doi/10.1007/s00216-006-1071-4
info:eu-repo/semantics/altIdentifier/issn/1618-2642
info:eu-repo/semantics/altIdentifier/issn/1618-2650
info:eu-repo/semantics/altIdentifier/wos/000245292200007
info:eu-repo/semantics/altIdentifier/pmid/17242890
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1594984
2020-12-26T15:11:50Z
journal_article
doc-type:article
Isoderrone
Bankeu Kezetas, Jean Jules
Ndjakou Lenta, Bruno
Ngouela, Silvere
Tsamo, Etienne
Sewald, Norbert ; https://orcid.org/0000-0002-0309-2655
Neumann, Beate
Stammler, Hans-Georg
Bankeu Kezetas JJ, Ndjakou Lenta B, Ngouela S, et al. Isoderrone. <em>Acta Crystallographica. Section E, Crystallographic Communications</em>. 2007;63(2):o523-o525.
The title compound, C20H16O5, also known as 5,7-dihyroxy-3-(2',2'-dimethyl-2H'-chromen-7'-yl) chroman-4-one, was isolated from the medicinal plant Ficus mucuso. The benzopyranone (chromen-4-one) ring system is essentially planar and the dihedral angle between the benzopyranone ring system and the other benzene ring is 37.7 (10)degrees. In the crystal structure, one-dimensional chains are formed via intermolecular O-H center dot center dot center dot O hydrogen bonds.
BLACKWELL PUBLISHING
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1594984
eng
info:eu-repo/semantics/altIdentifier/doi/10.1107/S1600536806056108
info:eu-repo/semantics/altIdentifier/issn/1600-5368
info:eu-repo/semantics/altIdentifier/wos/000245187300203
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1594997
2018-07-24T12:58:43Z
journal_article
doc-type:article
Role of the amygdala in decisions under ambiguity and decisions under risk: Evidence from patients with Urbach-Wiethe disease
Brand, Matthias
Grabenhorst, Fabian
Starcke, Katrin
Vandekerckhove, Marie M. P.
Markowitsch, Hans J.
emotional
Game of Dice Task
decision-making
Iowa Gambling Task
prefrontal cortex
processing
Brand M, Grabenhorst F, Starcke K, Vandekerckhove MMP, Markowitsch HJ. Role of the amygdala in decisions under ambiguity and decisions under risk: Evidence from patients with Urbach-Wiethe disease. <em>NEUROPSYCHOLOGIA</em>. 2007;45(6):1305-1317.
Various neuropsychological studies have shown that decision-making deficits can occur in a wide range of patients with brain damage or dysfunctions. Decisions under ambiguity, as measured with the Iowa Gambling Task, primarily depend on the integrity of the ventromedial prefrontal cortex and the amygdala, as well as on further brain regions such as the somatosensory cortex. However, little is known about the specific role of these structures in decisions under risk measured with tasks that offer explicit rules for gains and losses and winning probabilities, for example, the Game of Dice Task. We aimed to investigate the potential role of the arnygdala for decisions under risk. For this purpose, we examined three patients with Urbach-Wiethe disease-a rare syndrome associated with selective bilateral mineralisation of the amygdalae. Neuropsychological performance was assessed with the Iowa Gambling Task (decisions under ambiguity), the Game of Dice Task (decisions under risk), and an extensive neuropsychological test battery focussing on executive functions. Furthermore, previous studies found relationships between generating skin conductance responses and deciding advantageously in the Iowa Gambling Task. Accordingly, we recorded skin conductance responses during both decision tasks as a measure of emotional reactivity. Results indicate that patients with selective amygdala damage have lower scores in both decisions under ambiguity and decisions under risk. Decisions under risk are especially compromised in patients who also demonstrate deficits in executive functioning. In both gambling tasks, patients showed reduced skin conductance responses compared to healthy comparison subjects. The results suggest that deciding advantageously under risk conditions involves both the use of feedback from previous trials, as required by decisions under ambiguity, and in addition, executive functions. (c) 2006 Elsevier Ltd. All rights reserved.
PERGAMON-ELSEVIER SCIENCE LTD
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1594997
eng
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.neuropsychologia.2006.09.021
info:eu-repo/semantics/altIdentifier/issn/0028-3932
info:eu-repo/semantics/altIdentifier/wos/000245130900017
info:eu-repo/semantics/altIdentifier/pmid/17070876
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595004
2018-07-24T12:58:56Z
journal_article
doc-type:article
Segment specificity of load signal processing depends on walking direction in the stick insect leg muscle control system
Akay, Turgay
Ludwar, Bjoern Ch.
Goeritz, Marie L.
Schmitz, Josef ; https://orcid.org/0000-0003-2054-9124
Bueschges, Ansgar
walking direction
campaniform sensilla
reflex reversal
sensory feedback
pattern
locomotion
generation
Akay T, Ludwar BC, Goeritz ML, Schmitz J, Bueschges A. Segment specificity of load signal processing depends on walking direction in the stick insect leg muscle control system. <em>JOURNAL OF NEUROSCIENCE</em>. 2007;27(12):3285-3294.
SOC NEUROSCIENCE
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595004
eng
info:eu-repo/semantics/altIdentifier/doi/10.1523/JNEUROSCI.5202-06.2007
info:eu-repo/semantics/altIdentifier/issn/0270-6474
info:eu-repo/semantics/altIdentifier/issn/1529-2401
info:eu-repo/semantics/altIdentifier/wos/000245103700024
info:eu-repo/semantics/altIdentifier/pmid/17376989
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595014
2018-07-24T12:58:13Z
journal_article
doc-type:article
Erythromycin resistance-conferring plasmid pRSB105, isolated from a sewage treatment plant, harbors a new macrolide resistance determinant, an integron-containing Tn402-like element, and a large region of unknown function
Schlüter, Andreas ; https://orcid.org/0000-0003-4830-310X
Szczepanowski, Rafael
Kurz, N.
Schneiker-Bekel, Susanne
Krahn, Irene
Pühler, Alfred ; https://orcid.org/0000-0003-4723-2960
Schlüter A, Szczepanowski R, Kurz N, Schneiker-Bekel S, Krahn I, Pühler A. Erythromycin resistance-conferring plasmid pRSB105, isolated from a sewage treatment plant, harbors a new macrolide resistance determinant, an integron-containing Tn402-like element, and a large region of unknown function. <em>APPLIED AND ENVIRONMENTAL MICROBIOLOGY</em>. 2007;73(6):1952-1960.
The erythromycin resistance plasmid pRSB105 was previously isolated from an activated sludge bacterial community of a municipal wastewater treatment plant. Compilation of the complete pRSB105 nucleotide sequence revealed that the plasmid is 57,137 bp in size and has a mean G+C content of 56.66 mol%. The pRSB105 backbone is composed of two different replication and/or partitioning modules and a functional mobilization region encoding the mobilization genes mobCDE and mobBA. The first replicon (Rept) is nearly identical to the corresponding replication module of the multiresistance plasmid pRSB101 isolated from an unknown activated sludge bacterium. Accordingly, pRSB101 and pRSB105 are sister plasmids belonging to a new plasmid family. The second replicon (Rep2) of pRSB105 was classified as a member of the IncP-6 group. While Rep1 confers replication ability only in gamma-proteobacteria, Rep2 extents the host range of the plasmid since it is also functional in the P-proteobacterium Ralstonia eutropha. Plasmid pRSB105 harbors the macrolide resistance genes mel and mph, encoding, respectively, a predicted ABC-type efflux permease and a macrolide-2'-phosphotransferase. Erythromycin resistance is mainly attributed to mel, whereas mph contributes to erythromycin resistance to a lesser extent. The second resistance region, represented by an integron-containing Tn402-like element, includes a P-lactam (oxa10) and a trimethoprim (dftB2) resistance gene cassette. In addition to antibiotic resistance modules, pRSB105 encodes a functional restriction/modification system and two nonresistance regions of unknown function. The presence of different mobile genetic elements that flank resistance and nonresistance modules on pRSB105 indicates that these elements were involved in acquisition of accessory plasmid modules. Comparative genomics of pRSB105 and related plasmids elucidated that pRSB105 evolved by integration of distinct modules from different plasmid sources, including Pseudomonas aeruginosa plasmids, and thus represents a mosaic plasmid.
AMER SOC MICROBIOLOGY
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595014
eng
info:eu-repo/semantics/altIdentifier/doi/10.1128/AEM.02159-06
info:eu-repo/semantics/altIdentifier/issn/0099-2240
info:eu-repo/semantics/altIdentifier/wos/000245156800032
info:eu-repo/semantics/altIdentifier/pmid/7261525
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595026
2018-07-24T12:58:13Z
journal_article
doc-type:article
ddc:570
journal_articleFtxt
open_access
Synapses in the fly motion-vision pathway: Evidence for a broad range of signal amplitudes and dynamics
Beckers, Ulrich
Egelhaaf, Martin ; https://orcid.org/0000-0002-9336-4270
Kurtz, Rafael
ddc:570
Beckers U, Egelhaaf M, Kurtz R. Synapses in the fly motion-vision pathway: Evidence for a broad range of signal amplitudes and dynamics. <em>Journal of Neurophysiology</em>. 2007;97(3):2032-2041.
AMER PHYSIOLOGICAL SOC
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://nbn-resolving.org/urn:nbn:de:0070-pub-15950267
https://pub.uni-bielefeld.de/record/1595026
https://pub.uni-bielefeld.de/download/1595026/2903628
eng
info:eu-repo/semantics/altIdentifier/doi/10.1152/jn.01116.2006
info:eu-repo/semantics/altIdentifier/issn/0022-3077
info:eu-repo/semantics/altIdentifier/issn/1522-1598
info:eu-repo/semantics/altIdentifier/wos/000244864900021
info:eu-repo/semantics/altIdentifier/pmid/17215505
info:eu-repo/semantics/openAccess
https://rightsstatements.org/vocab/InC/1.0/
oai:pub.uni-bielefeld.de:1595031
2018-07-24T12:57:55Z
journal_article
doc-type:article
A Bayesian approach on molecules and behavior: Reconsidering phylogenetic and evolutionary patterns of the Salamandridae with emphasis on Triturus newts
Steinfartz, Sebastian
Vicario, Saverio
Arntzen, J. W.
Caccone, Adalgisa
Steinfartz S, Vicario S, Arntzen JW, Caccone A. A Bayesian approach on molecules and behavior: Reconsidering phylogenetic and evolutionary patterns of the Salamandridae with emphasis on Triturus newts. <em>JOURNAL OF EXPERIMENTAL ZOOLOGY PART B-MOLECULAR AND DEVELOPMENTAL EVOLUTION</em>. 2007;308B(2):139-162.
The monophyly of European newts of the genus Triturus within the family Salamandridae has for decades rested on presumably homologous behavioral and morphological characters. Molecular data challenge this hypothesis, but the phylogenetic position of Triturus within the Salamandridae has not yet been convincingly resolved. We addressed this issue and the temporal divergence of Triturus within the Salamandridae with novel Bayesian approaches applied to DNA sequence data from three mitochondrial genes (12S, 16S and cytb). We included 38 salamandrid species comprising all 13 recognized species of Triturus and 16 out of 17 salamandrid genera. A clade comprising all the "Newts" can be separated from the "True Salamanders" and Salamandrina clades. Within the "Newts" well-supported clades are: Tylototriton-Pleurodeles, the "New World Newts" (Notophthalmus-Taricha), and the "Modern Eurasian Newts" (Cynops, Pachytriton, Paramesotriton = together the "Modern Asian Newts", Calotriton, Euproctus, Neurergus and Triturus species). We found that Triturus is a non-monophyletic species assemblage, which includes four groups that are themselves monophyletic: W the "Large-Bodied Triturus" (six species), (ii) the "Small-Bodied Triturus" (five species), (iii) T. alpestris and (iv) T. vittatus. We estimated that the last common ancestor of Triturus existed around 64 million years ago (mya) while the root of the Salamandridae dates back to 95mya. This was estimated using a fossil-based molecular dating approach and an explicit framework to select calibration points that least underestimated their corresponding nodes. Using the molecular phylogeny we mapped the evolution of life history and courtship traits in Triturus and found that several Triturus-specific courtship traits evolved independently.
WILEY-LISS
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595031
eng
info:eu-repo/semantics/altIdentifier/doi/10.1002/jez.b.21119
info:eu-repo/semantics/altIdentifier/issn/1552-5007
info:eu-repo/semantics/altIdentifier/issn/1552-5015
info:eu-repo/semantics/altIdentifier/wos/000244945000005
info:eu-repo/semantics/altIdentifier/pmid/16969762
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595037
2018-07-24T12:58:50Z
journal_article
doc-type:article
Heterogeneous ice nucleation rate coefficient of water droplets coated by a nonadecanol monolayer
Zobrist, B.
Koop, Thomas ; https://orcid.org/0000-0002-7571-3684
Luo, B. P.
Marcolli, C.
Peter, T.
Zobrist B, Koop T, Luo BP, Marcolli C, Peter T. Heterogeneous ice nucleation rate coefficient of water droplets coated by a nonadecanol monolayer. <em>JOURNAL OF PHYSICAL CHEMISTRY C</em>. 2007;111(5):2149-2155.
The heterogeneous ice nucleation rate coefficient (j(het)) of water droplets coated with a monolayer of 1-nonadecanol was determined from multiple freezing/melting cycles. Freezing was monitored optically with a microscope for droplet radii between 31 and 48 mu m and with a differential scanning calorimeter for radii between 320 and 1100 mu m. The combination of these two techniques allows the surface area of the 1-nonadecanol nucleating agent to be varied by more than a factor of 1000, showing that j(het) increases only by similar to 5 orders of magnitude over a temperature range of 18 K. This is roughly 5 times less than the change in the ice nucleation rate coefficient for homogeneous ice freezing at around 238 K or for heterogeneous ice freezing in the presence of a solid ice nucleus, such as Al2O3. This temperature dependence of j(het) can be reconciled with the framework of classical nucleation theory, when assuming a reduced compatibility of the alcohol monolayer with the ice embryo as the temperature decreases. We attribute this finding to an enhanced ability of the alcohol monolayer to adapt to the ice structure close to the ice melting point due to larger thermal density fluctuations in the monolayer, which in turn makes the monolayer serve as a better ice nucleus.
AMER CHEMICAL SOC
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595037
eng
info:eu-repo/semantics/altIdentifier/doi/10.1021/jp066080w
info:eu-repo/semantics/altIdentifier/issn/1932-7447
info:eu-repo/semantics/altIdentifier/wos/000245005600047
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595044
2018-07-24T12:58:50Z
journal_article
doc-type:article
Influence of follicular fluid meiosis-activating sterol on aneuploidy rate and precocious chromatid segregation in aged mouse oocytes
Cukurcam, S.
Betzendahl, I.
Michel, G.
Vogt, E.
Hegele-Hartung, C.
Lindenthal, B.
Eichenlaub-Ritter, Ursula
maturation
oocyte
meiosis
non-disjunction
age
Cukurcam S, Betzendahl I, Michel G, et al. Influence of follicular fluid meiosis-activating sterol on aneuploidy rate and precocious chromatid segregation in aged mouse oocytes. <em>HUMAN REPRODUCTION</em>. 2007;22(3):815-828.
BACKGROUND: Follicular fluid meiosis-activating sterol (FF-MAS) protects young oocytes from precocious chromatid separation (predivision). Reduced expression of cohesion and checkpoint proteins and predivision has been hypothesized to occur in age-related aneuploidy in oocytes. METHODS: To know whether FF-MAS also protects aged oocytes from predivision and from age-related non-disjunction, we analysed chromosome constitution in mouse oocytes matured spontaneously with or without 10 mu M FF-MAS and in hypoxanthine (HX)-arrested young and aged oocytes induced to resume maturation by FF-MAS. Messenger RNA for checkpoint protein MAD2 and cohesion protein SMC1 beta was compared between oocytes matured with or without FF-MAS. RESULTS: Aged oocytes possessed many bivalents with single distal chiasma at meiosis I. Predivision was especially high in aged oocytes cultured sub-optimally to metaphase II in alpha-minimum essential medium (alpha-MEM). FF-MAS reduced predivision significantly (P < 0.001) but neither reduced non-disjunction nor induced aneuploidy in aged oocytes. Polyploidy was high in FF-MAS-stimulated maturation, in particular in the aged oocytes (P > 0.001). Relative levels of Smc1 beta mRNA appeared increased by maturation in FF-MAS, and mitochondrial clustering was restored. CONCLUSIONS: Sister chromatids of aged oocytes appear to be highly susceptible to precocious chromatid separation, especially when maturation is under sub-optimal conditions, e.g. in the absence of cumulus and FF-MAS. This may relate to some loss of chromatid cohesion during ageing. FF-MAS protects aged oocytes from predivision during maturation, possibly by supporting Smc1 beta expression, thus reducing risks of meiotic errors, but it cannot prevent age-related non-disjunction. Aged oocytes appear prone to loss of co-ordination between nuclear maturation and cytokinesis suggesting age-related relaxed cell cycle control.
OXFORD UNIV PRESS
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595044
eng
info:eu-repo/semantics/altIdentifier/doi/10.1093/humrep/del442
info:eu-repo/semantics/altIdentifier/issn/0268-1161
info:eu-repo/semantics/altIdentifier/issn/1460-2350
info:eu-repo/semantics/altIdentifier/wos/000245011700025
info:eu-repo/semantics/altIdentifier/pmid/17114196
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595053
2018-07-24T12:58:43Z
journal_article
doc-type:article
Preparation of doped spinel cobalt oxide thin films and evaluation of their thermal stability
Bahlawane, Naoufal ; https://orcid.org/0000-0003-1094-2512
Premkumar, Peter Antony
Feldmann, Janine
Kohse-Höinghaus, Katharina
emission IR
doped spinel
metal acetylacetonates
thermal
pulsed CVD
stability
Bahlawane N, Premkumar PA, Feldmann J, Kohse-Höinghaus K. Preparation of doped spinel cobalt oxide thin films and evaluation of their thermal stability. <em>CHEMICAL VAPOR DEPOSITION</em>. 2007;13(2-3):118-122.
Spinel cobalt oxide doped with nickel and zinc are deposited using a CVD reactor equipped with a pulsed spray evaporation system. This process allows easy control of the film composition through the adjustment of the composition of the liquid feed-stock; a linear dependence is observed in both cases. Doped spinels with atomic ratios of doping-metal to Co ranging from 0 to 0.5 are deposited and subjected to various surface characterization methods. Zinc as a doping metal, which nonselectively occupies the octahedral and the tetrahedral sites, preserves the cubic spinel structure; in contrast, nickel, which preferably occupies the octahedral sites, preserves the cubic structure only up to Ni/Co = 0.14 and then induces a tetragonal distortion. This disordered structure allows more polarons, and therefore presents a conductivity which increases substantially with the concentration of nickel in the deposited films. The thermal stability of cobalt oxide is maintained in the case of nickel doping as long as the cubic structure is preserved, and then decreases continuously with the concentration of nickel doping once the tetragonal deformation is induced. An upper thermal stability limit as low as 350 degrees C is observed for films with Ni/Co = 0.33. In contrast, zinc steadily improved the thermal stability with increased doping concentration, and reaches -850 degrees C, which is 200 degrees C higher than that of pure cobalt oxide.
WILEY-V C H VERLAG GMBH
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595053
eng
info:eu-repo/semantics/altIdentifier/doi/10.1002/cvde.200606517
info:eu-repo/semantics/altIdentifier/issn/0948-1907
info:eu-repo/semantics/altIdentifier/issn/1521-3862
info:eu-repo/semantics/altIdentifier/wos/000245394900009
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595059
2018-07-24T12:58:56Z
journal_article
doc-type:article
Towards biological supramolecular chemistry: A variety of pocket-templated, individual metal oxide cluster nucleations in the cavity of a Mo/W-storage protein
Schemberg, Joerg
Schneider, Klaus
Demmer, Ulrike
Warkentin, Eberhard
Müller, Achim ; https://orcid.org/0000-0003-0117-4021
Ermler, Ulrich
template
supramolecular chemistry
polyoxometalates
proteins
tungsten
synthesis
Schemberg J, Schneider K, Demmer U, Warkentin E, Müller A, Ermler U. Towards biological supramolecular chemistry: A variety of pocket-templated, individual metal oxide cluster nucleations in the cavity of a Mo/W-storage protein. <em>ANGEWANDTE CHEMIE-INTERNATIONAL EDITION</em>. 2007;46(14):2408-2413.
WILEY-V C H VERLAG GMBH
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595059
eng
info:eu-repo/semantics/altIdentifier/doi/10.1002/anie.200604858
info:eu-repo/semantics/altIdentifier/issn/1433-7851
info:eu-repo/semantics/altIdentifier/issn/1521-3773
info:eu-repo/semantics/altIdentifier/wos/000245371300011
info:eu-repo/semantics/altIdentifier/pmid/17304608
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595067
2018-07-24T12:57:55Z
journal_article
doc-type:article
Crystal structure of (7a ' SR)-7a '-prop-2-ynyl-1 ',2 ',4 ',6 ',7 ',7a '-hexahydrospiro[1,3-dioxolan-2,5 '-indene], C14H18O2
Tzvetkov, N. T.
Neumann, B.
Stammler, Hans-Georg
Mattay, Jochen
Tzvetkov NT, Neumann B, Stammler H-G, Mattay J. Crystal structure of (7a ' SR)-7a '-prop-2-ynyl-1 ',2 ',4 ',6 ',7 ',7a '-hexahydrospiro[1,3-dioxolan-2,5 '-indene], C14H18O2. <em>ZEITSCHRIFT FUR KRISTALLOGRAPHIE-NEW CRYSTAL STRUCTURES</em>. 2006;221(4):479-480.
C14H18O2, monoclinic, P12(1)/c1 (no. 14), a = 15.399(1) angstrom b = 11.646(1) angstrom, c = 14.849(1) angstrom, beta = 117.659(4)degrees, V = 2358.7 angstrom(3), Z = 8, R-gt(F) = 0.068, wR(ref)(F-2) = 0.206, T= 100 K.
OLDENBOURG VERLAG
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595067
eng
info:eu-repo/semantics/altIdentifier/doi/10.1524/ncrs.2006.0163
info:eu-repo/semantics/altIdentifier/issn/ARRAY(0xb6a2448)
info:eu-repo/semantics/altIdentifier/wos/000244813700026
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595073
2018-07-24T12:58:56Z
journal_article
doc-type:article
Crystal structure of (1aSR,3aRS,7aSR)-3a-but-2-ynyl-1a,2,3,3a,4,5-hexahydro-1H-cyclopropa[c]i nden-6(7H)-one, C14H18O
Tzvetkov, N. T.
Neumann, B.
Stammler, Hans-Georg
Mattay, Jochen
Tzvetkov NT, Neumann B, Stammler H-G, Mattay J. Crystal structure of (1aSR,3aRS,7aSR)-3a-but-2-ynyl-1a,2,3,3a,4,5-hexahydro-1H-cyclopropa[c]i nden-6(7H)-one, C14H18O. <em>ZEITSCHRIFT FUR KRISTALLOGRAPHIE-NEW CRYSTAL STRUCTURES</em>. 2006;221(4):481-482.
C14H18O, monoclinic, P12(1)/c1 (no. 14), a = 13.7800(4) angstrom, b = 7.1220(3) angstrom, c = 11.7670(7) angstrom, beta = 98.640(1)degrees, V = 1141.7 angstrom(3), Z = 4, R-gt(F) = 0.045, wR(ref)(F-2) = 0.125, T= 100 K.
OLDENBOURG VERLAG
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595073
eng
info:eu-repo/semantics/altIdentifier/doi/10.1524/ncrs.2006.0164
info:eu-repo/semantics/altIdentifier/issn/ARRAY(0xb3944f8)
info:eu-repo/semantics/altIdentifier/wos/000244813700027
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595083
2018-07-24T12:58:13Z
journal_article
doc-type:article
Attosecond real-time observation of electron tunnelling in atoms
Uiberacker, M.
Uphues, Thorsten
Schultze, M.
Verhoef, A. J.
Yakovlev, V.
Kling, M. F.
Rauschenberger, J.
Kabachnik, Nikolay M.
Schröder, H.
Lezius, M.
Kompa, K. L.
Muller, H. -G.
Vrakking, M. J. J.
Hendel, Stefan
Kleineberg, U.
Heinzmann, Ulrich
Drescher, Markus
Krausz, F.
Uiberacker M, Uphues T, Schultze M, et al. Attosecond real-time observation of electron tunnelling in atoms. <em>Nature</em>. 2007;446(7136):627-632.
Atoms exposed to intense light lose one or more electrons and become ions. In strong fields, the process is predicted to occur via tunnelling through the binding potential that is suppressed by the light field near the peaks of its oscillations. Here we report the real-time observation of this most elementary step in strong-field interactions: light-induced electron tunnelling. The process is found to deplete atomic bound states in sharp steps lasting several hundred attoseconds. This suggests a new technique, attosecond tunnelling, for probing short-lived, transient states of atoms or molecules with high temporal resolution. The utility of attosecond tunnelling is demonstrated by capturing multi-electron excitation (shake-up) and relaxation ( cascaded Auger decay) processes with subfemtosecond resolution.
NATURE PUBLISHING GROUP
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595083
eng
info:eu-repo/semantics/altIdentifier/doi/10.1038/nature05648
info:eu-repo/semantics/altIdentifier/issn/0028-0836
info:eu-repo/semantics/altIdentifier/issn/1476-4687
info:eu-repo/semantics/altIdentifier/wos/000245438300031
info:eu-repo/semantics/altIdentifier/pmid/17410167
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595103
2021-01-11T15:23:28Z
journal_article
doc-type:article
Organische Chemie 2006
Krueger, Anke
Wuerthner, Frank
Beifuss, Uwe
Senge, Mathias O.
Mueller, Thoma J. J.
Bach, Thorsten
Tshcierske, Carsten
Heydt, Heinrich
Hartung, Jens
Bucher, Gotz
Straub, Bernd F.
Muniz, Kilian
Ditrich, Klaus
Giernoth, Ralf
Oestreich, Martin
Draeger, Gerald
Lindel, Thomas
Jacquot, Delphine
Pietruszka, Joerg
Breinbauer, Rolf
Es-Sayed, Mazen
Pafu, Roland
Priepke, Henning
Suessmuth, Roderich D.
Sewald, Norbert ; https://orcid.org/0000-0002-0309-2655
Bisel, Philippe
Mueller, Michael
Weinhold, Elmar
Schalley, Christopher A.
Gschwind, Ruth
Braese, Stefan
Wagenknecht, Hans-Achim
Krueger A, Wuerthner F, Beifuss U, et al. Organische Chemie 2006. <em>Nachrichten aus der Chemie</em>. 2007;55(3):252-275.
Wiley
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595103
deu
info:eu-repo/semantics/altIdentifier/doi/10.1002/nadc.200743625
info:eu-repo/semantics/altIdentifier/issn/1439-9598
info:eu-repo/semantics/altIdentifier/wos/000244726000012
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595136
2018-07-24T12:58:56Z
journal_article
doc-type:article
Physical Chemistry 2006
Kleinermanns, Karl
Havenith, Martina
Koop, Thomas ; https://orcid.org/0000-0002-7571-3684
Spiess, Hans Wolfgang
Jeschke, Gunnar
Konig, Bernd W.
Willbold, Dieter
Popp, Juergen
Kleinermanns K, Havenith M, Koop T, et al. Physical Chemistry 2006. <em>NACHRICHTEN AUS DER CHEMIE</em>. 2007;55(3):285-296.
GESELLSCHAFT DEUTSCHER CHEMIKER E V
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595136
eng
info:eu-repo/semantics/altIdentifier/issn/1439-9598
info:eu-repo/semantics/altIdentifier/wos/000244726000014
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595149
2018-07-24T12:57:55Z
journal_article
doc-type:article
A superadditive solution for cephoidal bargaining problems
Pallaschke, Diethard
Rosenmüller, Joachim
superadditive solution
cephoid
bargaining
Pallaschke D, Rosenmüller J. A superadditive solution for cephoidal bargaining problems. <em>International Journal of Game Theory</em>. 2007;35(4):569-590.
We present a bargaining solution defined on a class of polytopes in R-n called "cephoids". The solution generalizes the superadditive solution exhibited by Maschler and Perles for two dimensions. It is superadditive on a subclass of cephoids.
Physica
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595149
eng
info:eu-repo/semantics/altIdentifier/doi/10.1007/s00182-006-0057-y
info:eu-repo/semantics/altIdentifier/issn/0020-7276
info:eu-repo/semantics/altIdentifier/wos/000245124900007
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595153
2018-07-24T12:58:13Z
journal_article
doc-type:article
Measuring the impact of wood species on consumer preferences for wooden furniture by means of the Analytic Hierarchy Process
Scholz, Sören
Decker, Reinhold ; https://orcid.org/0000-0003-2972-6182
Scholz S, Decker R. Measuring the impact of wood species on consumer preferences for wooden furniture by means of the Analytic Hierarchy Process. <em>FOREST PRODUCTS JOURNAL</em>. 2007;57(3):23-28.
While several studies have revealed the existence of substantial differences in consumers' perceptions of various wood species, the impact of these differences on the preference of wood furniture is still unknown. The present paper aims at closing this gap by referring to a recent mail survey that was conducted in Germany, which is one of the most important markets for furniture in the world. The Analytic Hierarchy Process (AHP) was applied to measure shifts in the individual preference structure arising in connection with the used hardwood species. We show that the applied wood species has a significant impact on the assessment of various attributes of wood dining tables. Knowing these effects supports the designing of wood furniture that meets consumer expectations.
FOREST PRODUCTS SOC
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595153
eng
info:eu-repo/semantics/altIdentifier/issn/0015-7473
info:eu-repo/semantics/altIdentifier/wos/000245218700005
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595161
2018-07-24T12:58:43Z
conference_abstract
doc-type:other
Single molecule Protein-RNA interactions
Fuhrmann, Alexander
Schöning, Jan C.
Getfert, Sebastian
Eckel, Rainer
Reimann, Peter
Anselmetti, Dario ; https://orcid.org/0000-0002-8720-4369
Staiger, Dorothee
Ros, Robert
Fuhrmann A, Schöning JC, Getfert S, et al. Single molecule Protein-RNA interactions. <em>BIOPHYSICAL JOURNAL</em>. 2007:168A-168A.
BIOPHYSICAL SOCIETY
2007
http://purl.org/coar/resource_type/c_c94f
info:eu-repo/semantics/other
doc-type:other
text
https://pub.uni-bielefeld.de/record/1595161
eng
info:eu-repo/semantics/altIdentifier/issn/0006-3495
info:eu-repo/semantics/altIdentifier/wos/000243972400782
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595182
2018-07-24T12:57:55Z
journal_article
doc-type:article
Determinants of childhood vaccination coverage in Kazakhstan in a period of societal change: Implications for vaccination policies
Akmatov, Manas K.
Kretzschmar, Mirjam
Krämer, Alexander ; https://orcid.org/0000-0003-2774-7860
Mikolajczyk, Rafael T.
vaccination coverage
societal change
Kazakhstan
Akmatov MK, Kretzschmar M, Krämer A, Mikolajczyk RT. Determinants of childhood vaccination coverage in Kazakhstan in a period of societal change: Implications for vaccination policies. <em>VACCINE</em>. 2007;25(10):1756-1763.
After the fall of the Soviet Union countries in Central Asia have undergone large changes. In Kazakhstan the vaccination coverage decreased between 1990 and 1995, which resulted in an increased incidence of some vaccine-preventable diseases, e.g. diphtheria and measles. In this study we examined which factors affected the vaccination status of children in Kazakhstan and whether they resemble patterns observed in developing or developed countries. We found a mixed pattern of risk factors, consistent with the status of Kazakhstan as a transitional economy. Especially prominent was the relatively high education of the women and good access to the medical care system. (c) 2006 Elsevier Ltd. All rights reserved.
ELSEVIER SCI LTD
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595182
eng
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.vaccine.2006.11.030
info:eu-repo/semantics/altIdentifier/issn/0264-410X
info:eu-repo/semantics/altIdentifier/wos/000244642700007
info:eu-repo/semantics/altIdentifier/pmid/17229498
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595191
2018-07-24T12:58:13Z
journal_article
doc-type:article
Structure of symmetric and asymmetric "ripple" phases in lipid bilayers
Lenz, Olaf
Schmid, Friederike
Lenz O, Schmid F. Structure of symmetric and asymmetric "ripple" phases in lipid bilayers. <em>Physical Review Letters</em>. 2007;98(5): 058104.
We reproduce the symmetric and asymmetric "rippled" Pp, states of lipid membranes by Monte Carlo simulations of a coarse-grained molecular model for lipid-solvent mixtures. The structure and properties compare favorably with experiments. The asymmetric ripple state is characterized by a periodic array of fully interdigitated "defect" lines. The symmetric ripple state maintains a bilayer structure, but is otherwise structurally similar. The main force driving the formation of both ripple states is the propensity of lipid molecules with large head groups to exhibit splay.
AMERICAN PHYSICAL SOC
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595191
eng
info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevLett.98.058104
info:eu-repo/semantics/altIdentifier/issn/0031-9007
info:eu-repo/semantics/altIdentifier/wos/000244646100080
info:eu-repo/semantics/altIdentifier/pmid/17358906
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595214
2020-11-05T12:01:40Z
journal_article
doc-type:article
Automorphisms of free groups and the mapping class groups of closed compact orientable surfaces
Adyan, Sergei Iwanowitsch
Grunewald, Fritz
Mennicke, Jens
Talambutsa, Alexey Leonidovich
mapping class group
fundamental
group
automorphism
homeomorphism
generators and defining relations
closed compact orientable surface
Adyan SI, Grunewald F, Mennicke J, Talambutsa AL. Automorphisms of free groups and the mapping class groups of closed compact orientable surfaces. <em>Mathematical Notes</em>. 2007;81(1-2):147-155.
Let N be the stabilizer of the word w = s(1)t(1)s(1)(-1)t(1)(-1) ...s(g)t(g)s(g)(-1)t(g)(-1) in the group of automorphisms Aut(F-2g) of the free group with generators {s(i), t(i)}(i=1),...,g. The fundamental group pi(1)(Sigma(g)) of a two-dimensional compact orientable closed surface of genus g in generators {s(i),t(i)} is determined by the relation w = 1. In the present paper, we find elements S-i, T-i is an element of N determining the conjugation by the generators s(i), t(i) in Aut(pi(1) (Sigma(g))). Along with an element beta is an element of N, realizing the conjugation by w, they generate the kernel of the natural epimorphism of the group N on the mapping class group M-g,M-0 = Aut(pi(1)(Sigma(g)))/Inn(pi(1)(Sigma(g))). We find the system of defining relations for this kernel in the generators S-1,..., Sg, T-1,..., T-g, alpha. In addition, we have found a subgroup in N isomorphic to the braid group B-g on g strings, which, under the abelianizing of the free group F-2g, is mapped onto the Subgroup of the Weyl group for Sp(2g, Z) consisting of matrices that contain only 0 and 1.
Springer
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595214
eng
info:eu-repo/semantics/altIdentifier/doi/10.1134/S0001434607010178
info:eu-repo/semantics/altIdentifier/issn/0001-4346
info:eu-repo/semantics/altIdentifier/wos/000244695200017
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595220
2018-07-24T12:58:56Z
journal_article
doc-type:article
Flexibility and variability of TIMP binding: X-ray structure of the complex between collagenase-3/MMP-13 and TIMP-2
Maskos, K.
Lang, R.
Tschesche, Harald
Bode, W.
matrix metalloproteinase/MMP
tissue inhibitor of
metalloproteinases/TIMP
complex
collagenase
flexibility
Maskos K, Lang R, Tschesche H, Bode W. Flexibility and variability of TIMP binding: X-ray structure of the complex between collagenase-3/MMP-13 and TIMP-2. <em>JOURNAL OF MOLECULAR BIOLOGY</em>. 2007;366(4):1222-1231.
The excessive activity of matrix metalloproteinases (MMPs) contributes to pathological processes such as arthritis, tumor growth and metastasis if not balanced by the tissue inhibitors of metalloproteinases (TIMPs). In arthritis, the destruction of fibrillar (type 11) collagen is one of the hallmarks, with MMP-1 (collagenase-1) and NIW-13 (collagenase-3) being identified as key players in arthritic cartilage. MMP-13, furthermore, has been found in highly metastatic tumors. We have solved the 2.0 angstrom crystal structure of the complex between the catalytic domain of human MMP-13 (cdMMP-13) and bovine TIMP-2. The overall structure resembles our previously determined MT1-MMP/TIMP-2 complex, in that the wedge-shaped TIMP-2 inserts with its edge into the entire MMP-13 active site cleft. However, the inhibitor is, according to a relative rotation of similar to 20 degrees, oriented differently relative to the proteinase. Upon TIMP binding, the catalytic zinc, the zinc-ligating side chains, the enclosing MMP loop and the S1' wall-forming segment move significantly and in concert relative to the rest of the cognate MMP, and the active site cleft constricts slightly, probably allowing a more favourable interaction between the Cys1(TIMP) alpha-amino group of the inhibitor and the catalytic zinc ion of the enzyme. Thus, this structure supports the view that the central N-terminal TIMP segment essentially defines the relative positioning of the TIMP, while the flanking edge loops determine the relative orientation, depending on the individual target MMP. (c) 2006 Elsevier Ltd. All rights reserved.
ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595220
eng
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jmb.2006.11.072
info:eu-repo/semantics/altIdentifier/issn/0022-2836
info:eu-repo/semantics/altIdentifier/wos/000244649500014
info:eu-repo/semantics/altIdentifier/pmid/17196980
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595226
2021-11-10T13:39:13Z
journal_article
doc-type:article
ddc:150
Validity of general mental ability for the prediction of job performance and training success in Germany: A meta-analysis
Hülsheger, Ute R.
Maier, Günter W. ; https://orcid.org/0000-0002-6818-5617
Stumpp, Thorsten
selection
metaanalysis
ddc:150
Hülsheger UR, Maier GW, Stumpp T. Validity of general mental ability for the prediction of job performance and training success in Germany: A meta-analysis. <em>International Journal of Selection and Assessment</em>. 2007;15(1):3-18.
A meta-analysis into the operational validity of general mental ability (GMA) measures in Germany is presented. The meta-analysis addresses the question whether findings of US and European meta-analyses are generalizable to Germany given the differences in the education systems of these countries. The high level of differentiation in the German educational system is expected to enhance the homogeneity of applicant pools resulting in a low level of variability in predictor scores which reduces the observed GMA performance relationships. Our analysis is based on 54 independent German articles and unpublished reports. Results indicated an operational validity of rho = .467 for training success (k = 90; N = 11,969) and rho = .534 for job performance (k = 9; N = 746). Moderator analyses showed that job complexity and the year of publication are relevant moderator variables, with lower job complexity levels and older studies being associated with higher operational validities. Findings suggest that overall German operational validities are comparable with findings in the United States or other European countries. However, for training success operational GMA validities are slightly lower in Germany compared with US or European meta-analyses.
Wiley
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595226
eng
info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1468-2389.2007.00363.x
info:eu-repo/semantics/altIdentifier/issn/0965-075X
info:eu-repo/semantics/altIdentifier/issn/1468-2389
info:eu-repo/semantics/altIdentifier/wos/000244740900002
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595230
2021-06-07T13:18:25Z
journal_article
doc-type:article
A model function for non-autonomous bifurcations of maps
Hüls, Thorsten
non-autonomous bifurcation theory
pitchfork
bifurcation
Beverton-Holt equation
transcritical bifurcation
non-autonomous discrete time dynamical systems
Hüls T. A model function for non-autonomous bifurcations of maps. <em>DISCRETE AND CONTINUOUS DYNAMICAL SYSTEMS-SERIES B</em>. 2007;7(2):351-363.
In this paper, we introduce a class of one-dimensional non-autonomous dynamical systems that allow an explicit study of their orbits, of the associated variational equations as well as of certain types of bifurcations. In a special case, the model class can be transformed into the non-autonomous Beverton-Holt equation. We use these model functions for analyzing various notions of non-autonomous transcritical and pitchfork bifurcations that have been recently proposed in the literature.
AMER INST MATHEMATICAL SCIENCES
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595230
eng
info:eu-repo/semantics/altIdentifier/issn/1531-3492
info:eu-repo/semantics/altIdentifier/wos/000244968400008
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595232
2018-07-24T12:58:56Z
journal_article
doc-type:article
A microstructure heat exchanger for quenching the metabolism of mammalian cells
Wiendahl, C.
Brandner, J. J.
Kueppers, C.
Luo, B.
Schygulla, U.
Noll, Thomas ; https://orcid.org/0000-0003-0748-3423
Oldiges, M.
microstructure heat exchanger
quenching
heat
metabolome analysis
transfer
Wiendahl C, Brandner JJ, Kueppers C, et al. A microstructure heat exchanger for quenching the metabolism of mammalian cells. <em>CHEMICAL ENGINEERING & TECHNOLOGY</em>. 2007;30(3):322-328.
Metabolomics, the quantification of intracellular metabolites, is a powerful tool that has proven useful in microbial strain and fermentation process development. The crucial step is the rapid quenching of the cellular metabolism to preserve the intracellular situation as it is in the bioreactor until (MS-based) analysis. For microbial systems and plants this can be achieved by using ice-cold methanol (-40 degrees C) or liquid nitrogen, but for mammalian cells in suspension no reliable technique is yet available. Here, a metallic microstructure heat exchanger is presented which allows cooling of a CHO cell suspension from cultivation temperature (37 degrees C) to 0 degrees C in less than one second without any detectable cell damage or cell disruption even at very high cell densities up to 8 . 10(6) cells/mL.
WILEY-V C H VERLAG GMBH
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595232
eng
info:eu-repo/semantics/altIdentifier/doi/10.1002/ceat.200600362
info:eu-repo/semantics/altIdentifier/issn/0930-7516
info:eu-repo/semantics/altIdentifier/issn/1521-4125
info:eu-repo/semantics/altIdentifier/wos/000245057800007
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595241
2018-07-24T12:58:50Z
journal_article
doc-type:article
Hexapod Walking: an expansion to Walknet dealing with leg amputations and force oscillations
Schilling, Malte ; https://orcid.org/0000-0002-0849-483X
Cruse, Holk
Arena, Paolo
Schilling M, Cruse H, Arena P. Hexapod Walking: an expansion to Walknet dealing with leg amputations and force oscillations. <em>Biological Cybernetics</em>. 2007;96(3):323-340.
SPRINGER
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595241
eng
info:eu-repo/semantics/altIdentifier/doi/10.1007/s00422-006-0117-1
info:eu-repo/semantics/altIdentifier/issn/0340-1200
info:eu-repo/semantics/altIdentifier/issn/1432-0770
info:eu-repo/semantics/altIdentifier/wos/000244684800003
info:eu-repo/semantics/altIdentifier/pmid/17106698
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595253
2018-07-24T12:58:50Z
journal_article
doc-type:article
An incomplex algorithm for fast suffix array construction
Schürmann, Klaus-Bernd
Stoye, Jens ; https://orcid.org/0000-0002-4656-7155
strings
permutations
indexing
suffix arrays
Schürmann K-B, Stoye J. An incomplex algorithm for fast suffix array construction. <em>SOFTWARE-PRACTICE & EXPERIENCE</em>. 2007;37(3):309-329.
The suffix array of a string is a permutation of all starting positions of the string's suffixes that are lexicographically sorted. We present a practical algorithm for suffix array construction that consists of two easy-to-implement components. First it sorts the suffixes with respect to a fixed length prefix; then it refines each bucket of suffixes sharing the same prefix using the order of already sorted suffixes. Other suffix array construction algorithms follow more complex strategies. Moreover, we achieve a very fast construction for common strings as well as for worst case strings by enhancing our algorithm with further techniques. Copyright (C) 2006 John Wiley & Sons, Ltd.
JOHN WILEY & SONS LTD
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595253
eng
info:eu-repo/semantics/altIdentifier/doi/10.1002/spe.768
info:eu-repo/semantics/altIdentifier/issn/0038-0644
info:eu-repo/semantics/altIdentifier/issn/1097-024X
info:eu-repo/semantics/altIdentifier/wos/000244904900004
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595257
2018-07-24T12:57:55Z
journal_article
doc-type:article
Nanostructured polymer brushes
Schmelmer, Ursula
Paul, Anne
Küller, Alexander
Steenackers, Marin
Ulman, Abraham
Grunze, Michael
Gölzhäuser, Armin ; https://orcid.org/0000-0002-0838-9028
Jordan, Rainer
patterning
polymer brushes
polymerization
nanolithography
Schmelmer U, Paul A, Küller A, et al. Nanostructured polymer brushes. <em>SMALL</em>. 2007;3(3):459-465.
Nanopatterned polymer brushes with sub-50-nm resolution were prepared by a combination of electron-beam chemical lithography (EBCL) of self-assembled monolayers (SAMs) and surface-initiated photopolymerization (SIPP). As a further development of our previous work, selective EBCL was performed with a highly focused electron beam and not via a mask, to region-selectively convert a SAM of 4'-nitro-1,1'-biphenyl-4-thiol to defined areas of crosslinked 4'-amino-1,1'-biphenyl-4-thiol. These "written" structures were then used to prepare surface-bonded, asymmetric, azo initiator sites of 4'-azomethylmalonodinitrile-1,1'-biphenyl-4-thiol. In the presence of bulk styrene, SIPP amplified the primary structures of line widths from 500 to 10 nm to polystyrene structures of line widths 530 nm down to approximately 45 nm at a brush height of 10 or 7 nm, respectively, as measured by scanning electron microscopy and atomic force microscopy (A FM). The relative position of individual structures was within a tolerance of a few nanometers, as verified by AFM. At line-to-line spacings down to 50-70 nm, individual polymer brush structures are still observable. Below this threshold, neighboring structures merge due to chain overlap.
WILEY-V C H VERLAG GMBH
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595257
eng
info:eu-repo/semantics/altIdentifier/doi/10.1002/smll.200600528
info:eu-repo/semantics/altIdentifier/issn/1613-6810
info:eu-repo/semantics/altIdentifier/issn/1613-6829
info:eu-repo/semantics/altIdentifier/wos/000244909500020
info:eu-repo/semantics/altIdentifier/pmid/17245782
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595269
2018-07-24T12:57:55Z
journal_article
doc-type:article
Modeling human activity in the spirit of Barabasi's queueing systems
Blanchard, Philippe
Hongler, M. -O.
Blanchard P, Hongler M-O. Modeling human activity in the spirit of Barabasi's queueing systems. <em>Phys. Rev. E</em>. 2007;75(2):026102.
Barabasi has shown that the priority-based scheduling rules in single-stage queuing systems (QS) generate fat tail behavior for the task waiting time distributions (WTD). These fat tails are induced by the waiting times of very low priority tasks that stay unserved almost forever as the task priority indices are "frozen in time" (i.e., a task priority is assigned once for all to each incoming task). Here, we study the new dynamic behavior expected when the priority of each incoming task is time-dependent (i.e., "aging mechanisms" are allowed). For two classes of models, namely a population-type model with an age structure and a QS with deadlines assigned to the incoming tasks, which is operated under the "earliest-deadline-first" policy, we are able to extract analytically some relevant characteristics of the task waiting time distribution. As the aging mechanism ultimately assigns high priority to any long waiting tasks, fat tails in the WTD cannot find their origin in the scheduling rule alone, thus showing a fundamental difference between our approach and Barabasi's class of models.
AMERICAN PHYSICAL SOC
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595269
eng
info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevE.75.026102
info:eu-repo/semantics/altIdentifier/issn/1539-3755
info:eu-repo/semantics/altIdentifier/issn/1550-2376
info:eu-repo/semantics/altIdentifier/wos/000244532000005
info:eu-repo/semantics/altIdentifier/pmid/17358389
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595273
2018-07-24T12:58:13Z
journal_article
doc-type:article
Random walks along the streets and canals in compact cities: Spectral analysis, dynamical modularity, information, and statistical mechanics
Volchenkov, Dimitry
Blanchard, Philippe
Volchenkov D, Blanchard P. Random walks along the streets and canals in compact cities: Spectral analysis, dynamical modularity, information, and statistical mechanics. <em>Physical Review E</em>. 2007;75(2):6104-6118.
Different models of random walks on the dual graphs of compact urban structures are considered. Analysis of access times between streets helps to detect the city modularity. The statistical mechanics approach to the ensembles of lazy random walkers is developed. The complexity of city modularity can be measured by an informationlike parameter which plays the role of an individual fingerprint of Genius loci. Global structural properties of a city can be characterized by the thermodynamic parameters calculated in the random walk problem.
American Physical Soc.
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595273
eng
info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevE.75.026104
info:eu-repo/semantics/altIdentifier/issn/1539-3755
info:eu-repo/semantics/altIdentifier/issn/1550-2376
info:eu-repo/semantics/altIdentifier/wos/000244532000007
info:eu-repo/semantics/altIdentifier/pmid/17358391
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595277
2018-07-24T12:58:50Z
journal_article
doc-type:article
Momentum conservation and correlation analyses in heavy-ion collisions at ultrarelativistic energies
Borghini, Nicolas ; https://orcid.org/0000-0002-3906-3258
Borghini N. Momentum conservation and correlation analyses in heavy-ion collisions at ultrarelativistic energies. <em>PHYSICAL REVIEW C</em>. 2007;75(2): 021904.
Global transverse-momentum conservation induces correlations between any number of particles, which contribute in particular to the two- and three-particle correlations measured in heavy-ion collisions. These correlations are examined in detail, and their importance for studies of jets and their interaction with the medium is discussed.
AMERICAN PHYSICAL SOC
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595277
eng
info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevC.75.021904
info:eu-repo/semantics/altIdentifier/issn/0556-2813
info:eu-repo/semantics/altIdentifier/issn/1089-490X
info:eu-repo/semantics/altIdentifier/wos/000244534400007
info:eu-repo/semantics/altIdentifier/arxiv/nucl-th/0612093
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595280
2018-07-24T12:58:13Z
journal_article
doc-type:article
Validation of a real-time PCR for the quantitative estimation of a G143A mutation in the cytochrome bc(1), gene of Pyrenophora teres
Kianianmomeni, Arash
Schwarz, Gerhard
Felsenstein, Friedrich G.
Wenzel, Gerhard
Pyrenophora teres
quantitative real-time
strobilurin
resistance
PCR
QoI
Kianianmomeni A, Schwarz G, Felsenstein FG, Wenzel G. Validation of a real-time PCR for the quantitative estimation of a G143A mutation in the cytochrome bc(1), gene of Pyrenophora teres. <em>PEST MANAGEMENT SCIENCE</em>. 2007;63(3):219-224.
A single nucleotide polymorphism (SNP) in the cytochrome b gene confers resistance to strobilurin fungicides for several fungal pathogens. Therefore, on the basis of a change at amino acid position 143 from glycine to alanine, a real-time PCR assay was established for the quantitative detection of the analogous SNP in the cytochrome b sequence of Pyrenophora teres Drechsler, which causes barley net blotch. Allelic discrimination was achieved by using allele specific primers with artificially mismatched nucleic acid bases and minor groove binding probes. Validation parameters for the lower limits of the working range, namely limits of detection (LOD) and limits of quantification (LOQ), were statistically determined by the variance of calibration data, as well as by the variance of the 100% non-strobilurin-resistant allele DNA sample (blank values). It was found that the detection was limited by the variance of blank values (five in 801458 copies; 0.0006%), whereas the quantification was limited by the variance of calibration data (37 in 801458 copies; 0.0046%). The real-time PCR assay was finally used to monitor strobilurin-resistant cytochrome b alleles in barley net blotch field samples, which were already classified in in vivo biotests to be fully sensitive to strobilurins. All signals for strobilurin-resistant cytochrome b alleles were below the LOD, and therefore the results are in total agreement with the phenotypes revealed by biotests. (c) 2006 Society of Chemical Industry
JOHN WILEY & SONS LTD
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595280
eng
info:eu-repo/semantics/altIdentifier/doi/10.1002/ps.1290
info:eu-repo/semantics/altIdentifier/issn/1526-498X
info:eu-repo/semantics/altIdentifier/issn/1526-4998
info:eu-repo/semantics/altIdentifier/wos/000244611400002
info:eu-repo/semantics/altIdentifier/pmid/17078012
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595286
2018-07-24T12:58:43Z
conference
doc-type:conferenceObject
Quarkonium binding and dissociation: The spectral analysis of the QGP
Satz, Helmut
Satz H. Quarkonium binding and dissociation: The spectral analysis of the QGP. In: <em>Nuclear Physics A</em>. NUCLEAR PHYSICS A. Vol 783. ELSEVIER SCIENCE BV; 2007: 249C-260C.
in statistical QCD, the thermal properties of the quark-gluon plasma can be determined by studying the in-medium behaviour of heavy quark bound states. The results can be applied to quarkonium production in high energy nuclear collisions, if these indeed form a fully equilibrated QGP. Modifications could arise if an initial charm excess persists in the collision evolution and caused quarkonium regeneration at hadronization.
ELSEVIER SCIENCE BV
2007
http://purl.org/coar/resource_type/c_5794
info:eu-repo/semantics/conferenceObject
doc-type:conferenceObject
text
https://pub.uni-bielefeld.de/record/1595286
eng
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.nuclphysa.2006.11.026
info:eu-repo/semantics/altIdentifier/issn/0375-9474
info:eu-repo/semantics/altIdentifier/wos/000244574400031
info:eu-repo/semantics/altIdentifier/arxiv/hep-ph/0609197
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595318
2018-07-24T12:58:43Z
journal_article
doc-type:article
Nematode communities in contaminated river sediments
Heininger, Peter
Hoess, Sebastian
Claus, Evelyn
Pelzer, Juergen
Traunspurger, Walter
nematode community
river sediments
pollution
generic composition
site structure
Heininger P, Hoess S, Claus E, Pelzer J, Traunspurger W. Nematode communities in contaminated river sediments. <em>ENVIRONMENTAL POLLUTION</em>. 2007;146(1):64-76.
Nematode communities of eight sites from three river catchments were investigated in terms of the genera composition, feeding types, and life-history strategists. The sampling sites showed a gradient of anthropogenic contamination with heavy metals and organic pollutants being important factors in differentiating the sites. Nematode community structure was related to sediment pollution and the hydro-morphological structure of the sampling sites. Heavily contaminated sites were characterized by communities with high relative abundances of omnivorous and predacious nematodes (Tobrilus, c-p 3; Mononchus, c-p 4), while sites with low to medium contamination were dominated by bacterivorous nematodes (Monhystera, Daptonema; c-p 2) or suction feeders (Dorylaimus, c-p 4). The relatively high Maturity Index values in the heavily polluted sites were surprising. Nematodes turned out to be a suitable organism group for monitoring sediment quality, with generic composition being the most accurate indicator for assessing differences in nematode community structure. (c) 2006 Elsevier Ltd. All rights reserved.
ELSEVIER SCI LTD
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595318
eng
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.envpol.2006.06.023
info:eu-repo/semantics/altIdentifier/issn/0269-7491
info:eu-repo/semantics/altIdentifier/wos/000244595200009
info:eu-repo/semantics/altIdentifier/pmid/16905227
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595343
2018-07-24T12:58:13Z
journal_article
doc-type:article
A chemically induced new pea (Pisum sativum) mutant SGECd(t) with increased tolerance to, and accumulation of, cadmium
Tsyganov, Viktor E.
Belimov, Andrei A.
Borisov, Alexey Y.
Safronova, Vera I.
Georgi, Manfred
Dietz, Karl-Josef
Tikhonovich, Igor A.
calcium
Pisum sativum
pea mutant
homeostasis
nutrient
heavy metals
cadmium tolerance
glutathione
Tsyganov VE, Belimov AA, Borisov AY, et al. A chemically induced new pea (Pisum sativum) mutant SGECd(t) with increased tolerance to, and accumulation of, cadmium. <em>Annals of Botany</em>. 2007;99(2):227-237.
Background and Aims To date, there are no crop mutants described in the literature that display both Cd accumulation and tolerance. In the present study a unique pea (Pisum sativum) mutant SGECd(t) with increased Cd tolerance and accumulation was isolated and characterized. Methods Ethylmethane sulfonate mutagenesis of the pea line SGE was used to obtain the mutant. Screening for Cd-tolerant seedlings in the M-2 generation was performed using hydroponics in the presence of 6 mu(M) CdCl2. Hybridological analysis was used to identify the inheritance of the mutant phenotype. Several physiological and biochemical characteristics of SGECd(t) were studied in hydroponic experiments in the presence of 3 mu(M) CdCl2, and elemental analysis was conducted. Key Results The mutant SGECd(t) was characterized as having a monogenic inheritance and a recessive phenotype. It showed increased Cd concentrations in roots and shoots but no obvious morphological defects, demonstrating its capability to cope well with increased Cd levels in its tissues. The enhanced Cd accumulation in the mutant was accompanied by maintenance of homeostasis of shoot Ca, Mg, Zn and Mn contents, and root Ca and Mg contents. Through the application of La+3 and the exclusion of Ca from the nutrient solution, maintenance of nutrient homeostasis in Cd-stressed SGECd(t) was shown to contribute to the increased Cd tolerance. Control plants of the mutant (i.e. no Cd treatment) had elevated concentrations of glutathione (GSH) in the roots. Through measurements of chitinase and guaiacol-dependent peroxidase activities, as well as proline and non-protein thiol (NPT) levels. it was shown that there were lower levels of Cd stress both in roots and shoots of SGECd(t). Accumulation of phytochelatins [(PCcalculated) = (NPT) - (GSH)] could be excluded as a cause of the increased Cd tolerance in the mutant. Conclusions The SGECd(t) mutant represents a novel and unique model to study adaptation of plants to toxic heavy metal concentrations.
OXFORD UNIV PRESS
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595343
eng
info:eu-repo/semantics/altIdentifier/doi/10.1093/aob/mcl261
info:eu-repo/semantics/altIdentifier/issn/0305-7364
info:eu-repo/semantics/altIdentifier/issn/1095-8290
info:eu-repo/semantics/altIdentifier/wos/000244566000003
info:eu-repo/semantics/altIdentifier/pmid/17259229
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595352
2018-07-24T12:58:56Z
journal_article
doc-type:article
ddc:570
journal_articleFtxt
open_access
Physiological and molecular characterization of a Synechocystis sp PCC 6803 mutant lacking histidine kinase Slr1759 and response regulator Slr1760
Nodop, Anke
Suzuki, Iwane
Barsch, Aiko
Schroeder, Ann-Kristin
Niehaus, Karsten
Staiger, Dorothee
Pistorius, Elfriede K.
Michel, Klaus-Peter
Synechocystis sp PCC 6803
histidine kinase
two-component system
ddc:570
Nodop A, Suzuki I, Barsch A, et al. Physiological and molecular characterization of a Synechocystis sp PCC 6803 mutant lacking histidine kinase Slr1759 and response regulator Slr1760. <em>Zeitschrift für Naturforschung C</em>. 2006;61(11-12):865-878.
The hybrid sensory histidine kinase Slr1759 of the cyanobacterium Synechocystis sp. strain PCC 6803 contains multiple sensory domains and a multi-step phosphorelay system. Immuno blot analysis provided evidence that the histidine kinase Slr1759 is associated with the cytoplasmic membrane. The gene slr1759 is part of an operon together with slr1760, encoding a response regulator. A comparative investigation was performed on Synechocystis sp. strain PCC 6803 wild type (WT) and an insertionally inactivated slr1759-mutant (Hik14) which also lacks the transcript for the response regulator Slr1760. The mutant Hik14 grew significantly slower than WT in the early growth phase, when both were inoculated with a low cell density into 13611 medium without additional buffer and when aerated with air enriched with 2% CO2. Since the aeration with CO2-enriched air results in a decrease of the pH value in the medium, the growth experiments indicated that Hik14 is not able to adjust its metabolic activities as rapidly as WT to compensate for a larger decrease of the pH value in the medium. No significant differences in growth between Hik14 and WT were observed when cells were inoculated with a higher cell density in BG11 medium or when the BG11 medium contained 50 mm Epps-NaOH, pH 7.5, to prevent the pH drop. This Hik14 phenotype has so far only been seen under the above defined growth condition. Results of photosynthetic activity measurements as well as Northern blot-, immuno blot-, and metabolite analyses suggest that the two-component system Slr1759/Slr1760 has a function in the coordination of several metabolic activities which is in good agreement with the complex domain structure of Slr1759. The direct targets of this two-component system have so far not been identified.
Verlag der Zeitschrift für Naturforschung
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://nbn-resolving.org/urn:nbn:de:0070-pub-15953522
https://pub.uni-bielefeld.de/record/1595352
https://pub.uni-bielefeld.de/download/1595352/2441614
eng
info:eu-repo/semantics/altIdentifier/issn/0939-5075
info:eu-repo/semantics/altIdentifier/wos/000244440900015
info:eu-repo/semantics/altIdentifier/pmid/17294699
info:eu-repo/semantics/openAccess
https://rightsstatements.org/vocab/InC/1.0/
oai:pub.uni-bielefeld.de:1595371
2019-07-18T14:38:22Z
journal_article
doc-type:article
Stochastic evolution equations of jump type: Existence, uniqueness and large deviation principles
Röckner, Michael
Zhang, Tusheng
exponential integrability
large
deviation principles
evolution equations
Poisson measure
Röckner M, Zhang T. Stochastic evolution equations of jump type: Existence, uniqueness and large deviation principles. <em>Potential Analysis</em>. 2007;26(3):255-279.
This paper has two parts. In part I, existence and uniqueness results are established for solutions of stochastic evolution equations driven both by Brownian motion and by Poisson point processes. Exponential integrability of the solution are also proved. In part II, a large deviation principle is obtained for stochastic evolution equations driven by additive Levy noise.
Springer
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595371
eng
info:eu-repo/semantics/altIdentifier/doi/10.1007/s11118-006-9035-z
info:eu-repo/semantics/altIdentifier/issn/0926-2601
info:eu-repo/semantics/altIdentifier/wos/000244693200003
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595375
2018-07-24T12:58:43Z
journal_article
doc-type:article
K ->pi pi amplitudes from lattice QCD with a light charm quark
Giusti, L.
Hernandez, P.
Laine, Mikko ; https://orcid.org/0000-0002-2680-4213
Pena, C.
Wennekers, J.
Wittig, H.
Giusti L, Hernandez P, Laine M, Pena C, Wennekers J, Wittig H. K ->pi pi amplitudes from lattice QCD with a light charm quark. <em>PHYSICAL REVIEW LETTERS</em>. 2007;98(8): 082003.
We compute the leading-order low-energy constants of the Delta S=1 effective weak Hamiltonian in the quenched approximation of QCD with up, down, strange, and charm quarks degenerate and light. They are extracted by comparing the predictions of finite-volume chiral perturbation theory with lattice QCD computations of suitable correlation functions carried out with quark masses ranging from a few MeV up to half of the physical strange mass. We observe a Delta I=1/2 enhancement in this corner of the parameter space of the theory. Although matching with the experimental result is not observed for the Delta I=1/2 amplitude, our computation suggests large QCD contributions to the physical Delta I=1/2 rule in the GIM limit, and represents the first step to quantify the role of the charm-quark mass in K ->pi pi amplitudes. The use of fermions with an exact chiral symmetry is an essential ingredient in our computation.
AMERICAN PHYSICAL SOC
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595375
eng
info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevLett.98.082003
info:eu-repo/semantics/altIdentifier/issn/0031-9007
info:eu-repo/semantics/altIdentifier/issn/1079-7114
info:eu-repo/semantics/altIdentifier/wos/000244420700019
info:eu-repo/semantics/altIdentifier/arxiv/hep-ph/0607220
info:eu-repo/semantics/altIdentifier/pmid/17359089
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595383
2020-12-27T16:06:42Z
journal_article
doc-type:article
Short and efficient synthesis of cryptophycin unit A
Eissler, Stefan
Nahrwold, Markus
Neumann, Beate
Stammler, Hans-Georg
Sewald, Norbert ; https://orcid.org/0000-0002-0309-2655
Eissler S, Nahrwold M, Neumann B, Stammler H-G, Sewald N. Short and efficient synthesis of cryptophycin unit A. <em>Organic Letters</em>. 2007;9(5):817-819.
Two short synthetic approaches toward cryptophycin unit A comprise a catalytic asymmetric dihydroxylation as the sole source of chirality, while all further stereogenic centers are introduced under substrate control. The key step of the first route is a vinylogous Mukaiyama aldol addition, which introduces the alpha,beta-unsaturated ester moiety with defined configuration at the delta-carbon atom. Likewise, allylation with allyltributylstannane diastereoselectively gives the homoallylic alcohol that can be converted by a metathesis reaction to a unit A precursor.
AMER CHEMICAL SOC
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595383
eng
info:eu-repo/semantics/altIdentifier/doi/10.1021/ol063032l
info:eu-repo/semantics/altIdentifier/issn/1523-7060
info:eu-repo/semantics/altIdentifier/issn/1523-7052
info:eu-repo/semantics/altIdentifier/wos/000244348900021
info:eu-repo/semantics/altIdentifier/pmid/17284043
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595390
2018-07-24T12:58:56Z
journal_article
doc-type:article
A new measurement of the Collins and Sivers asymmetries on a transversely polarised deuteron target
Ageev, E. S.
Alexakhin, V. Yu.
Alexandrov, Yu.
Alexeev, G. D.
Alexeev, M.
Amoroso, A.
Badelek, B.
Balestra, F.
Ball, J.
Barth, J.
Baum, Günter
Becker, M.
Bedfer, Y.
Berglund, P.
Bernet, C.
Bertini, R.
Bettinelli, M.
Birsa, R.
Bisplinghoff, J.
Bordalo, P.
Bradamante, F.
Bressan, A.
Brona, G.
Burtin, E.
Bussa, M. P.
Bytchkov, V. N.
Chapiro, A.
Cicuttin, A.
Colantoni, M.
Colavita, A. A.
Costa, S.
Crespo, M. L.
d'Hose, N.
Dalla Torre, S.
Das, S.
Dasgupta, S. S.
De Masi, R.
Dedek, N.
Demchenko, D.
Denisov, O. Yu.
Dhara, L.
Diaz, V.
Dinkelbach, A. M.
Donskov, S. V.
Dorofeev, V. A.
Doshita, N.
Duic, V.
Duennweber, W.
Efremov, A.
Eversheim, P. D.
Eyrich, W.
Faessler, M.
Falaleev, V.
Fauland, P.
Ferrero, A.
Ferrero, L.
Finger, M.
Finger, M., Jr.
Fischer, H.
Franz, J.
Friedrich, J. M.
Frolov, V.
Fuchs, U.
Garfagnini, R.
Gautheron, Fabrice
Gavrichtchouk, O. P.
Gerassimov, S.
Geyer, R.
Giorgia, M.
Gobbo, B.
Goertz, S.
Gorin, A. M.
Grajek, O. A.
Grasso, A.
Grube, B.
Guskov, A.
Haas, F.
Hannappel, J.
von Harrach, D.
Hasegawa, T.
Hedicke, S.
Heinsius, F. H.
Hermann, R.
Hess, C.
Hinterberger, F.
von Hodenberg, M.
Horikawa, N.
Horikawa, S.
Horn, I.
Ilgner, C.
Ioukaev, A. I.
Ishimoto, S.
Ivanchin, I.
Ivanov, O.
Iwata, T.
Jahn, R.
Janata, A.
Joosten, R.
Jouravlev, N. I.
Kabuss, E.
Kalinnikov, V.
Kang, D.
Ketzer, B.
Khaustov, G. V.
Khokhlov, Yu. A.
Kisselev, Yu.
Klein, F.
Klimaszewski, K.
Koblitz, S.
Koivuniemi, J. H.
Kolosov, V. N.
Komissarov, E. V.
Kondo, K.
Koenigsmann, K.
Konorov, I.
Konstantinov, V. F.
Korentchenko, A. S.
Korzenev, A.
Kotzinian, A. M.
Koutchinski, N. A.
Kouznetsov, O.
Kowalik, K.
Kramer, D.
Kravchuk, N. P.
Krivokhizhin, G. V.
Kroumchtein, Z. V.
Kubart, J.
Kuhn, R.
Kukhtin, V.
Kunne, F.
Kurek, K.
Ladygin, M. E.
Lamanna, M.
Le Goff, J. M.
Leberig, M.
Lednev, A. A.
Lehmann, A.
Lichtenstadt, J.
Liska, T.
Ludwig, I.
Maggiora, A.
Maggiora, M.
Magnon, A.
Mallot, G. K.
Marchand, C.
Marroncle, J.
Martin, A.
Marzec, J.
Masek, L.
Massmann, F.
Matsuda, T.
Matthiae, D.
Maximov, A. N.
Meyer, W.
Mielech, A.
Mikhailov, Yu. V.
Moinester, M. A.
Nagel, T.
Naehle, O.
Nassalski, J.
Neliba, S.
Neyret, D. P.
Nikolaenko, V. I.
Nozdrin, A. A.
Obraztsov, V. F.
Olshevsky, A. G.
Ostrick, M.
Padee, A.
Pagano, P.
Panebianco, S.
Panzieri, D.
Paul, S.
Peshekhonov, D. V.
Peshekhonov, V. D.
Piragino, G.
Platchkov, S.
Platzer, K.
Pochodzalla, J.
Polak, J.
Polyakov, V. A.
Pontecorvo, G.
Popov, A. A.
Pretz, J.
Procureur, S.
Quintans, C.
Ramos, S.
Reicherz, G.
Richter, A.
Rondio, E.
Rozhdestvensky, A. M.
Ryabchikov, D.
Samoylenko, V. D.
Sandacz, A.
Santos, H.
Sapozhnikov, M. G.
Savin, I. A.
Schiavon, P.
Schill, C.
Schmitt, L.
Schoenmeier, P.
Schroeder, W.
Seeharsch, D.
Seimetz, M.
Setter, D.
Shevchenko, O. Yu.
Siebert, H. -W.
Silva, L.
Sinha, L.
Sissakian, A. N.
Slunecka, M.
Smirnov, G. I.
Sozzi, F.
Srnka, A.
Stinzing, F.
Stolarski, M.
Sugonyaev, V. P.
Sulc, M.
Sulej, R.
Tchalishev, V. V.
Tessaro, S.
Tessarotto, F.
Teufel, A.
Tkatchev, L. G.
Toeda, T.
Trippel, S.
Venugopal, G.
Virius, M.
Vlassov, N. V.
Wagner, M.
Webb, R.
Weise, E.
Weitzel, Q.
Windmolders, R.
Wislicki, W.
Zanetti, A. M.
Zaremba, K.
Zavertyaev, M.
Zhao, J.
Ziegler, R.
Zvyagin, A.
asymmetry
Sivers asymmetry
COMPASS
deuteron
transversity
transverse single-spin asymmetry
Collins
Ageev ES, Alexakhin VY, Alexandrov Y, et al. A new measurement of the Collins and Sivers asymmetries on a transversely polarised deuteron target. <em>Nucl.Phys. B</em>. 2007;765(1-2):31-70.
New high precision measurements of the Collins and Sivers, asymmetries of charged hadrons produced in deep-inelastic scattering of muons on a transversely polarised (LiD)-Li-6 target are presented. The data were taken in 2003 and 2004 with the COMPASS spectrometer using the muon beam of the CERN SPS at 160 GeV/c. Both the Collins and Sivers asymmetries turn out to be compatible with zero, within the present statistical errors, which are more than a factor of 2 smaller than those of the published COMPASS results from the 2002 data. The final results from the 2002, 2003 and 2004 runs are compared with naive expectations and with existing model calculations. (c) 2006 Elsevier B.V. All rights reserved.
ELSEVIER SCIENCE BV
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595390
eng
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.nuclphysb.2006.10.027
info:eu-repo/semantics/altIdentifier/issn/0550-3213
info:eu-repo/semantics/altIdentifier/wos/000244490100002
info:eu-repo/semantics/altIdentifier/arxiv/hep-ex/0610068
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595632
2018-07-24T12:57:55Z
conference
doc-type:conferenceObject
Transverse flow in relativistic viscous hydrodynamics
Baier, Rudolf
Romatschke, Paul
Wiedemann, Urs Achim
Baier R, Romatschke P, Wiedemann UA. Transverse flow in relativistic viscous hydrodynamics. In: <em>Nuclear Physics A</em>. Nucl.Phys. A. Vol 782. Elsevier; 2007: 313C-318C.
Hydrodynamic model simulations of Au-Au collisions at RHIC have indicated recently, that with improved simulations in the coming years, it may be feasible to quantify the viscosity of the matter produced in heavy ion collisions. To this end, a consistent fluid dynamic description of viscous effects is clearly needed. In this note, we observe that a recently used, approximate form of the 2nd order Israel-Stewart viscous hydrodynamic equations of motion cannot account consistently for the transverse flow fields, which are expected to develop in heavy ion collisions. We identify the appropriate equations of motion.
Elsevier
2007
http://purl.org/coar/resource_type/c_5794
info:eu-repo/semantics/conferenceObject
doc-type:conferenceObject
text
https://pub.uni-bielefeld.de/record/1595632
eng
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.nuclphysa.2006.10.016
info:eu-repo/semantics/altIdentifier/issn/0375-9474
info:eu-repo/semantics/altIdentifier/wos/000244425500044
info:eu-repo/semantics/altIdentifier/arxiv/nucl-th/0604006
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595637
2018-07-24T12:57:55Z
journal_article
doc-type:article
Adaptive subwavelength control of nano-optical fields
Aeschlimann, Martin
Bauer, Michael
Bayer, Daniela
Brixner, Tobias
Garcia de Abajo, F. Javier
Pfeiffer, Walter
Rohmer, Martin
Spindler, Christian
Steeb, Felix
Aeschlimann M, Bauer M, Bayer D, et al. Adaptive subwavelength control of nano-optical fields. <em>NATURE</em>. 2007;446(7133):301-304.
Adaptive shaping of the phase and amplitude of femtosecond laser pulses has been developed into an efficient tool for the directed manipulation of interference phenomena, thus providing coherent control over various quantum-mechanical systems(1-10). Temporal resolution in the femtosecond or even attosecond range has been demonstrated, but spatial resolution is limited by diffraction to approximately half the wavelength of the light field (that is, several hundred nanometres). Theory has indicated(11,12) that the spatial limitation to coherent control can be overcome with the illumination of nanostructures: the spatial near-field distribution was shown to depend on the linear chirp of an irradiating laser pulse. An extension of this idea to adaptive control, combining multiparameter pulse shaping with a learning algorithm, demonstrated the generation of user-specified optical near-field distributions in an optimal and flexible fashion(13). Shaping of the polarization of the laser pulse 14,15 provides a particularly efficient and versatile nano-optical manipulation method(16,17). Here we demonstrate the feasibility of this concept experimentally, by tailoring the optical near field in the vicinity of silver nanostructures through adaptive polarization shaping of femtosecond laser pulses 14,15 and then probing the lateral field distribution by two-photon photoemission electron microscopy(18). In this combination of adaptive control(1-10) and nano-optics(19), we achieve subwave-length dynamic localization of electromagnetic intensity on the nanometre scale and thus overcome the spatial restrictions of conventional optics. This experimental realization of theoretical suggestions(11-13,16,17,20) opens a number of perspectives in coherent control, nano-optics, nonlinear spectroscopy, and other research fields in which optical investigations are carried out with spatial or temporal resolution.
NATURE PUBLISHING GROUP
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595637
eng
info:eu-repo/semantics/altIdentifier/doi/10.1038/nature05595
info:eu-repo/semantics/altIdentifier/issn/0028-0836
info:eu-repo/semantics/altIdentifier/issn/1476-4687
info:eu-repo/semantics/altIdentifier/wos/000244892900041
info:eu-repo/semantics/altIdentifier/pmid/17361179
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595655
2018-07-24T12:58:56Z
journal_article
doc-type:article
Hydrophilic inorganic macro-ions in solution: Unprecedented self-assembly emerging from historical "blue waters"
Liu, Tianbo
Diemann, Ekkehard
Müller, Achim ; https://orcid.org/0000-0003-0117-4021
Liu T, Diemann E, Müller A. Hydrophilic inorganic macro-ions in solution: Unprecedented self-assembly emerging from historical "blue waters". <em>JOURNAL OF CHEMICAL EDUCATION</em>. 2007;84(3):526-532.
AMER CHEMICAL SOC
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595655
eng
info:eu-repo/semantics/altIdentifier/doi/10.1021/ed084p526
info:eu-repo/semantics/altIdentifier/issn/0021-9584
info:eu-repo/semantics/altIdentifier/issn/1938-1328
info:eu-repo/semantics/altIdentifier/wos/000244486700031
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595659
2018-07-24T12:58:43Z
journal_article
doc-type:article
The contribution of health discussion groups with students to campus health promotion
Meier, Sabine
Stock, Christiane
Krämer, Alexander ; https://orcid.org/0000-0003-2774-7860
university students
health discussion group
health promotion
Meier S, Stock C, Krämer A. The contribution of health discussion groups with students to campus health promotion. <em>Health Promotion International</em>. 2007;22(1):28-36.
Based on the idea of implementing health promotion in the university setting, this project is aimed at identifying determinants of health and well-being in the working and living environment of students and at developing targeted health interventions. The approach of health discussion groups is a well-established tool in workplace health promotion to enable participation and empowerment. This concept was innovatively applied and evaluated with the student body. There were seven sessions held at the University of Bielefeld with students from five different areas, a representative of the university management and a representative from the compulsory accident assurance. Process evaluation was done through standardized questionnaires and guided interviews with the participants while its impact was assessed in a follow-up period of 3 years by the amount of effects. Data included 11 distinct topics from the areas of study conditions, learning and their living environment with a total of 46 ideas for health-promoting actions. The process evaluation showed highly positive results, both in quantitative as well as qualitative approaches. Critical points were the resistances of students to participate in health discussion groups and the low confidence of students in the implementation of the proposed measures. The follow-up after 3 years showed that 11% of proposed actions could not be implemented, while 43% have resulted in recommendations for policy guidelines, 20% were fully implemented and 26% is still in progress. In conclusion, the health discussion group proved to be a useful instrument for student participation in university-based health promotion. Special emphasis should be given towards decreasing barriers for participation. The implementation of the proposed actions is highly depending on well-established structures of health promotion, such as a steering committee, and the commitment of the university management.
OXFORD UNIV PRESS
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595659
eng
info:eu-repo/semantics/altIdentifier/doi/10.1093/heapro/dal041
info:eu-repo/semantics/altIdentifier/issn/0957-4824
info:eu-repo/semantics/altIdentifier/issn/1460-2245
info:eu-repo/semantics/altIdentifier/wos/000244429000005
info:eu-repo/semantics/altIdentifier/pmid/17164269
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595684
2018-07-24T12:58:13Z
journal_article
doc-type:article
Sustainability of US public debt: Estimating smoothing spline regressions
Greiner, Alfred
Kauermann, Göran
public debt
non-parametric estimation
smoothing
sustainability
splines
Greiner A, Kauermann G. Sustainability of US public debt: Estimating smoothing spline regressions. <em>ECONOMIC MODELLING</em>. 2007;24(2):350-364.
In this paper we analyze how the primary surplus to GDP ratio in the US reacts to variations in the public debt-GDP ratio. In contrast to earlier studies we perform non-parametric and semi-parametric estimations. Our results show that the response of the primary surplus to GDP ratio is a positive nonlinear function of the public debt-GDP ratio. Further, our estimations demonstrate that the coefficient giving the response of the primary surplus-GDP ratio to a change in the public debt-GDP ratio declines over time when we assume a linear model with time dependent coefficients. (c) 2006 Elsevier B.V. All tights reserved.
ELSEVIER SCIENCE BV
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595684
eng
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.econmod.2006.08.004
info:eu-repo/semantics/altIdentifier/issn/0264-9993
info:eu-repo/semantics/altIdentifier/wos/000244457700010
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595688
2018-07-24T12:58:50Z
journal_article
doc-type:article
The first trinuclear manganese triplesalen complex: Synthesis, structural, and magnetic characterization of [(talen(NO2)){Mn-III(DMSO)(2)}(3)](ClO4)(3)
Glaser, Thorsten
Heidemeier, Maik
Froehlich, Roland
ESI-MS
ligand folding
polynuclear transition metal complexes
magnetic properties
FTIR
manganese
Glaser T, Heidemeier M, Froehlich R. The first trinuclear manganese triplesalen complex: Synthesis, structural, and magnetic characterization of [(talen(NO2)){Mn-III(DMSO)(2)}(3)](ClO4)(3). <em>COMPTES RENDUS CHIMIE</em>. 2007;10(1-2):71-78.
The reaction of the nitro-substituted triplesalen ligand H(6)talen(NO2) with Mn(ClO4)(2)center dot 6H(2)O in CH3CN in the presence of Et3N and DMSO results in the formation of [(talen(NO2)){Mn-III(DMSO)(2)}(3)](ClO4)(3) (1) which has been characterized by elemental analysis, FTIR, UV-vis-NIR, ESI-MS, single-crystal X-ray diffraction, and magnetic measurements. The triplesalen ligand (talen(NO2))(6-) provides three salen-like coordination environments bridged in a meta-phenylene arrangement by a phloroglucinol backbone. The coordination environment of each Mn-III ion is completed by two O-bonded DMSO molecules. The folding of the triplesaten ligand results in an overall dish-like geometry for the trication in 1. The magnetic characterization has been performed by temperature dependent magnetic susceptibility measurements and variable temperature-variable field (VTVH) magnetization data in order to determine both the exchange couplings J between the S-i = 2 ion and the local zero-field splittings D-i. Simulations to the appropriate spin-Hamiltonian using a full-matrix diagonalization approach provided a weak antiferromagnetic interaction J = -0.30 +/- 0.05 cm(-1) but a strong magnetic anisotropy expressed by D = -4.0 +/- 0.4 cm(-1). The potential applications of 1 and forthcoming members of this new family of trinuclear manganese triplesalen complexes in molecule-based magnetism and homogenous catalysis are discussed.
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595688
eng
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.crci.2006.09.009
info:eu-repo/semantics/altIdentifier/issn/1631-0748
info:eu-repo/semantics/altIdentifier/wos/000244788900012
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595704
2022-03-15T12:27:42Z
journal_article
doc-type:article
Homometric model sets and window covariograms
Baake, Michael
Grimm, Uwe
homometry
covariogram
model sets
Baake M, Grimm U. Homometric model sets and window covariograms. <em>Zeitschrift für Kristallographie</em>. 2007;222(2):54-58.
Two Delone sets are called homometric when they share the same autocorrelation or Patterson measure. A model set A within a given cut and project scheme is a Delone set that is defined through a window W in internal space. The autocorrelation measure of A is a pure point measure whose coefficients can be calculated via the socalled covariogram of W. Two windows with the same covariogram thus result in homometric model sets. On the other hand, the inverse problem of determining A from its diffraction image ultimately amounts to reconstructing W from its covariogram. This is also known as Matheron's covariogram problem. It is well studied in convex geometry, where certain uniqueness results have been obtained in recent years. However, for non-convex windows, uniqueness fails in a relevant way, so that interesting applications to the homometry problem emerge. We discuss this in a simple setting and show a planar example of distinct homometric model sets.
OLDENBOURG VERLAG
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595704
eng
info:eu-repo/semantics/altIdentifier/doi/10.1524/zkri.2007.222.2.54
info:eu-repo/semantics/altIdentifier/issn/0044-2968
info:eu-repo/semantics/altIdentifier/wos/000244329400002
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595711
2018-07-24T12:58:13Z
journal_article
doc-type:article
Functionality of the beta/six site-specific recombination system in tobacco and Arabidopsis: A novel tool for genetic engineering of plant genomes
Gronlund, Jesper T.
Stemmer, Christian
Lichota, Jacek
Merkle, Thomas
Grasser, Klaus D.
serine recombinase
genetic engineering
site-specific recombination
resolvase
HMG protein
chromosomal protein
Gronlund JT, Stemmer C, Lichota J, Merkle T, Grasser KD. Functionality of the beta/six site-specific recombination system in tobacco and Arabidopsis: A novel tool for genetic engineering of plant genomes. <em>Plant Molecular Biology</em>. 2007;63(4):545-556.
SPRINGER
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595711
eng
info:eu-repo/semantics/altIdentifier/doi/10.1007/s11103-006-9108-9
info:eu-repo/semantics/altIdentifier/issn/0167-4412
info:eu-repo/semantics/altIdentifier/issn/1573-5028
info:eu-repo/semantics/altIdentifier/wos/000244317200008
info:eu-repo/semantics/altIdentifier/pmid/17131098
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595718
2018-07-24T12:58:56Z
journal_article
doc-type:article
Rhizobium-initiated rice growth inhibition caused by nitric oxide accumulation
Perrine-Walker, Francine M.
Gartner, Elena
Hocart, Charles H.
Becker, Anke
Rolfe, Barry G.
denitrification
nitrite
nitrate reduction
Perrine-Walker FM, Gartner E, Hocart CH, Becker A, Rolfe BG. Rhizobium-initiated rice growth inhibition caused by nitric oxide accumulation. <em>MOLECULAR PLANT-MICROBE INTERACTIONS</em>. 2007;20(3):283-292.
Isolates of Rhizobium leguminosarum bv. trifolii (the clover root-nodule endosymbiont) from the Nile River delta have been found to infect rice roots and colonize the intercellular spaces of the rice roots. Some of these isolates inhibit rice seedling growth but one in particular, R4, has been found in rice roots which develop and grow normally. We present evidence that the induced growth inhibition is due to a toxic accumulation of nitric oxide (NO), from the reduction of nitrate, and suggest that the reason that R4 does not inhibit rice root growth is because it is capable of completing the reduction of NO through to nitrogen gas. Thus, strain R4 is a candidate for engineering into a future biological nitrogen fixation system within these roots.
AMER PHYTOPATHOLOGICAL SOC
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595718
eng
info:eu-repo/semantics/altIdentifier/doi/10.1094/MPMI-20-3-0283
info:eu-repo/semantics/altIdentifier/issn/0894-0282
info:eu-repo/semantics/altIdentifier/wos/000244257200007
info:eu-repo/semantics/altIdentifier/pmid/17378431
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595725
2018-07-24T12:58:56Z
journal_article
doc-type:article
Identification of combustion intermediates in isomeric fuel-rich premixed butanol-oxygen flames at low pressure
Yang, Bin
Oßwald, Patrick ; https://orcid.org/0000-0002-2257-2988
Li, Yuyang
Wang, Jing
Wei, Lixia
Tian, Zhen-Yu
Qi, Fei
Kohse-Höinghaus, Katharina
combustion intermediates
photoionization
efficiency spectra
mass spectrometry
butanol-oxygen flame
Yang B, Oßwald P, Li Y, et al. Identification of combustion intermediates in isomeric fuel-rich premixed butanol-oxygen flames at low pressure. <em>COMBUSTION AND FLAME</em>. 2007;148(4):198-209.
Laminar premixed low-pressure flames fueled by either one of the four isomers of butanol were investigated by a molecular-beam photoionization mass spectrometer using vacuum ultraviolet (VUV) synchrotron radiation as the ionization source. The photoionization efficiency (PIE) spectra of most flame intermediates were measured between 7.75 and 11.00 eV. By comparing the resulting PIE spectra to known ionization energies (IEs) or known PIE spectra of pure substances, most hydrocarbon and oxygenated combustion intermediates, including some radicals, in the mass range from m/z = 15 to 106 were assigned and identified in the four butanol flames. The results show that the higher-mass oxygenated species in butanol flames are strongly affected by the fuel structure, while many hydrocarbon isomers appear almost independent of the fuel structure. The respective dissociation mechanisms of the fuels, including complex fission, simple fission, and H-atom abstraction, are in good agreement with previous results from nonpremixed butanol flames. (c) 2006 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
ELSEVIER SCIENCE INC
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595725
eng
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.combustflame.2006.12.001
info:eu-repo/semantics/altIdentifier/issn/0010-2180
info:eu-repo/semantics/altIdentifier/wos/000244288400002
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595735
2018-07-24T12:58:13Z
journal_article
doc-type:article
Ice recrystallization inhibition and molecular recognition of ice faces by poly(vinyl alcohol)
Budke, Carsten
Koop, Thomas ; https://orcid.org/0000-0002-7571-3684
adsorption
ice
molecular
recrystallization
recognition
crystal growth
Budke C, Koop T. Ice recrystallization inhibition and molecular recognition of ice faces by poly(vinyl alcohol). <em>ChemPhysChem</em>. 2006;7(12):2601-2606.
The effects of poly(vinyl alcohol) (PVA) on the Ostwald ripening of polycrystalline ice samples are studied. At -6 degrees C, ice recrystallization in sucrose solutions is inhibited at PVA concentrations down to 0.005 mg mL(-1), with a recrystollization inhibition constant of 48.9 mL mg(-1). Ice growth-habit experiments reveal molecular recognition of the arrangement of water molecules in the ice by PVA molecules, and indicate that PVA molecules adsorb to the primary and secondary prism faces of hexagonal ice, lh. Based on these observations, together with an analysis of the O-atom pattern in ice and the conformation of OH groups in PVA, an adsorption model is proposed. We suggest that PVA segments adsorb to the primary and secondary prism faces of ice parallel to the c axis with a linear misfit parameter of only 2.7%, most likely via multiple hydrogen bonds. The proposed adsorption mechanism is discussed in the light of recent thermal hysteresis and scanning tunneling microscopy experiments.
WILEY-V C H VERLAG
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595735
eng
info:eu-repo/semantics/altIdentifier/doi/10.1002/cphc.200600533
info:eu-repo/semantics/altIdentifier/issn/1439-4235
info:eu-repo/semantics/altIdentifier/wos/000244334000026
info:eu-repo/semantics/altIdentifier/pmid/17109452
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595739
2018-07-24T12:58:50Z
journal_article
doc-type:article
In situ dark field microscopy for on-line monitoring of yeast cultures
Wei, Ning
You, Jia
Friehs, Karl
Flaschel, Erwin
Nattkemper, Tim Wilhelm ; https://orcid.org/0000-0002-7986-1158
aspheric lens
biomass
density
viability
cell
yeast
dark field microscopy
fermentation
Wei N, You J, Friehs K, Flaschel E, Nattkemper TW. In situ dark field microscopy for on-line monitoring of yeast cultures. <em>BIOTECHNOLOGY LETTERS</em>. 2007;29(3):373-378.
A new-type in situ probe has been developed to acquire dark field images of yeast in bioreactors. It has been derived from an in situ bright field microscope that is able to measure cell density in bioreactors during fermentation processes. The illumination part of the probe has been replaced with a dark field device, in which an aspheric condenser is used, so that high contrast dark field images can be obtained. The technique of second imaging is implemented to improve the sharpness of the images by means of a relay lens. This new in situ probe is expected to enable the evaluation of the cell viability without staining owing to modern image processing.
SPRINGER
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595739
eng
info:eu-repo/semantics/altIdentifier/doi/10.1007/s10529-006-9245-x
info:eu-repo/semantics/altIdentifier/issn/0141-5492
info:eu-repo/semantics/altIdentifier/issn/1573-6776
info:eu-repo/semantics/altIdentifier/wos/000244293000006
info:eu-repo/semantics/altIdentifier/pmid/17186133
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595750
2018-07-24T12:58:43Z
conference
doc-type:conferenceObject
Thermal reaction and stability of NiFe/Cu thin films investigated by atom probe tomography
Ene, C. B.
Schmitz, G.
Kirchheim, R.
Hütten, Andreas
thin films
atom probe tomography
field ion microscopy
GMR
Ene CB, Schmitz G, Kirchheim R, Hütten A. Thermal reaction and stability of NiFe/Cu thin films investigated by atom probe tomography. In: <em>Surface and Interface Analysis</em>. SURFACE AND INTERFACE ANALYSIS. Vol 39. JOHN WILEY & SONS LTD; 2007: 227-231.
NiFe/Cu multilayer stacks of 2 nm single layer thickness were deposited onto needle-shaped W tips by ion beam sputtering and analysed by atom probe tomography (TAP) after appropriate heat treatments. After annealing at 250 degrees C for 30 min, no significant structural or chemical transformation of the initial layer system is detected, although such a heat treatment appreciably reduces the magneto resistivity. A slight decrease of the concentration slope at the interfaces is attributed to a very short-range interdiffusion. Clear grain boundary diffusion is observed after annealing at 400 degrees C for 30 min. Further annealing at 500 degrees C for 20 min and 40 min still preserves the layered structure with a homogeneous solution of Ni inside the Cu layers of up to 25 at.% Ni. Copyright (C) 2007 John Wiley & Sons, Ltd.
JOHN WILEY & SONS LTD
2007
http://purl.org/coar/resource_type/c_5794
info:eu-repo/semantics/conferenceObject
doc-type:conferenceObject
text
https://pub.uni-bielefeld.de/record/1595750
eng
info:eu-repo/semantics/altIdentifier/doi/10.1002/sia.2519
info:eu-repo/semantics/altIdentifier/issn/0142-2421
info:eu-repo/semantics/altIdentifier/wos/000244295600028
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595756
2018-07-24T12:58:56Z
journal_article
doc-type:article
Photochemical single-molecule affinity switch
Schäfer, Christian
Eckel, Rainer
Ros, Robert
Mattay, Jochen
Anselmetti, Dario ; https://orcid.org/0000-0002-8720-4369
Schäfer C, Eckel R, Ros R, Mattay J, Anselmetti D. Photochemical single-molecule affinity switch. <em>Journal of the American Chemical Society</em>. 2007;129(6):1488-1489.
Manipulation and control at the molecular level is a prerequisite for future nanomachines and nanodevices. In order to build a bistable molecular affinity switch, we have synthesized a supramolecular guest-host system whose binding affinity can externally be controlled and repetitively switched by UV light or heating. This photochemical macrocycle, which incorporates a supramolecular resorc[4] arene receptor cavity and two photodimerizable anthracene moieties, has been investigated by single-molecule force spectroscopy under external optical control which proved the repetitive and selective activation and deactivation at the level of individual molecular complexes. This synthetic photochemical single-molecule reaction acts as an intermolecular switch and can be affinity-tuned under external control, which allows new concepts for directed molecular assembly and motional functionalities at the nanoscale in the future.
AMER CHEMICAL SOC
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595756
eng
info:eu-repo/semantics/altIdentifier/doi/10.1021/ja067734h
info:eu-repo/semantics/altIdentifier/issn/0002-7863
info:eu-repo/semantics/altIdentifier/issn/1520-5126
info:eu-repo/semantics/altIdentifier/wos/000244000700008
info:eu-repo/semantics/altIdentifier/pmid/17249675
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595763
2018-07-24T12:58:56Z
journal_article
doc-type:article
The gas-phase basicity and proton affinity of 7-methyl-1,3,5-cycloheptatriene as determined by the thermokinetic method
Mormann, Michael
Kuck, Dietmar
Mormann M, Kuck D. The gas-phase basicity and proton affinity of 7-methyl-1,3,5-cycloheptatriene as determined by the thermokinetic method. <em>JOURNAL OF MASS SPECTROMETRY</em>. 2007;42(2):263-265.
JOHN WILEY & SONS LTD
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595763
eng
info:eu-repo/semantics/altIdentifier/doi/10.1002/jms.1142
info:eu-repo/semantics/altIdentifier/issn/1076-5174
info:eu-repo/semantics/altIdentifier/issn/1096-9888
info:eu-repo/semantics/altIdentifier/wos/000244211300014
info:eu-repo/semantics/altIdentifier/pmid/17154351
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595774
2018-07-24T12:58:43Z
journal_article
doc-type:article
Lightest sterile neutrino abundance within the vMSM
Asaka, Takehiko
Shaposhnikov, Mikhail
Laine, Mikko ; https://orcid.org/0000-0002-2680-4213
neutrino physics
thermal field
theory
cosmology of theories beyond the SM
Asaka T, Shaposhnikov M, Laine M. Lightest sterile neutrino abundance within the vMSM. <em>JOURNAL OF HIGH ENERGY PHYSICS</em>. 2007;2007(01): 091.
We determine the abundance of the lightest (dark matter) sterile neutrinos created in the Early Universe due to active-sterile neutrino transitions from the thermal plasma. Our starting point is the field-theoretic formula for the sterile neutrino production rate, derived in our previous work [JHEP 06( 2006) 053], which allows to systematically incorporate all relevant effects, and also to analyse various hadronic uncertainties. Our numerical results direr moderately from previous computations in the literature, and lead to an absolute upper bound on the mixing angles of the dark matter sterile neutrino. Comparing this bound with existing astrophysical X-ray constraints, we find that the Dodelson-Widrow scenario, which proposes sterile neutrinos generated by active-sterile neutrino transitions to be the sole source of dark matter, is only possible for sterile neutrino masses lighter than 3.5 keV (6 keV if all hadronic uncertainties are pushed in one direction and the most stringent X-ray bounds are relaxed by a factor of two). This upper bound may conflict with a lower bound from structure formation, but a definitive conclusion necessitates numerical simulations with the non-equilibrium momentum distribution function that we derive. If other production mechanisms are also operative, no upper bound on the sterile neutrino mass can be established.
INT SCHOOL ADVANCED STUDIES
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595774
eng
info:eu-repo/semantics/altIdentifier/doi/10.1088/1126-6708/2007/01/091
info:eu-repo/semantics/altIdentifier/issn/1126-6708
info:eu-repo/semantics/altIdentifier/issn/1029-8479
info:eu-repo/semantics/altIdentifier/wos/000244120200091
info:eu-repo/semantics/altIdentifier/arxiv/hep-ph/0612182
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595778
2022-03-15T12:28:02Z
journal_article
doc-type:article
A radial analogue of Poisson's summation formula with applications to powder diffraction and pinwheel patterns
Baake, Michael
Frettlöh, Dirk
Grimm, Uwe
powder diffraction
pinwheel patterns
Poisson's summation formula
circular symmetry
Baake M, Frettlöh D, Grimm U. A radial analogue of Poisson's summation formula with applications to powder diffraction and pinwheel patterns. <em>JOURNAL OF GEOMETRY AND PHYSICS</em>. 2007;57(5):1331-1343.
Diffraction images with continuous rotation symmetry arise from amorphous systems, but also from regular crystals when investigated by powder diffraction. On the theoretical side, pinwheel patterns and their higher dimensional generalisations display such symmetries as well, in spite of being perfectly ordered. We present first steps and results towards a general frame to investigate such systems, with emphasis on statistical properties that are helpful to understand and compare the diffraction images. An alternative substitution rule for the pinwheel tiling, with two different prototiles, permits the derivation of several combinatorial and spectral properties of this still somewhat enigmatic example. These results are compared with properties of the square lattice and its powder diffraction. (c) 2006 Michael Baake. Published by Elsevier B.V. All rights reserved.
ELSEVIER SCIENCE BV
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595778
eng
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.geomphys.2006.10.009
info:eu-repo/semantics/altIdentifier/issn/0393-0440
info:eu-repo/semantics/altIdentifier/wos/000244240200003
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595783
2018-07-24T12:57:55Z
journal_article
doc-type:article
Synthesis of the η2-1-Phosphaallene Complexes [(η5-C5H5)(CO)(NO)W{η2-R1P=C=C(R2)H}] (R1 = t-Bu, Cy; R2 = Ph, H) from [(η5-C5H5)(CO)(NO)W=C=C(R2)H] (R2 = Ph, H) and Inversely Polarized Phosphaalkenes R1P=C(NMe2)2 (R1 = t-Bu, Cy) and Their Structure
Weber, Lothar
Noveski, Gabriel
Braun, Thomas
Stammler, Hans-Georg
Neumann, Beate
phosphaalkenes
phosphaallene complexes
vinylidene complexes
tungsten
Weber L, Noveski G, Braun T, Stammler H-G, Neumann B. Synthesis of the η2-1-Phosphaallene Complexes [(η5-C5H5)(CO)(NO)W{η2-R1P=C=C(R2)H}] (R1 = t-Bu, Cy; R2 = Ph, H) from [(η5-C5H5)(CO)(NO)W=C=C(R2)H] (R2 = Ph, H) and Inversely Polarized Phosphaalkenes R1P=C(NMe2)2 (R1 = t-Bu, Cy) and Their Structure. <em>European Journal of Inorganic Chemistry</em>. 2007;2007(4):562-567.
The reaction of the vinylidene complex [(eta(5)-C5H5)(CO)(NO)-W=C=C(H)Ph] (9) with the phosphaalkenes RP=C(NMe2)(2) (1a: R=tBu; 1c: R=c-C6H11) affords the novel eta(2)-1-phosphaallene complexes [eta(2)-{RP=C=C(H)Ph}W(CO)(NO)(eta(5)-C5H5)] (14: R=tBu; 15: R=c-C6H11) in addition to the carbene complex [(eta(5)-C5H5)(CO)(NO)W=C(NMe2)C(Ph)=C(H)NMe2] (16). Similarly, treatment of [(eta(5)-C5H5)(CO)(NO)W=C=CH2] (12) with the phosphaalkenes gives rise to the formation of [eta(2)-{RP=C=CH2})W(CO)(NO)(eta(5)-C5H5)] (17: R=tBu; 18: R=c-C6H11. The novel compounds 14, 15, 17, and 18 were characterized by elemental analysis and by spectroscopy (IR, H-1, C-13 NMR, MS). Moreover, the molecular structures of 14 and 16 were determined by X-ray diffraction analyses. ((c) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)
Wiley
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595783
eng
info:eu-repo/semantics/altIdentifier/doi/10.1002/ejic.200600922
info:eu-repo/semantics/altIdentifier/issn/1434-1948
info:eu-repo/semantics/altIdentifier/issn/1099-0682
info:eu-repo/semantics/altIdentifier/wos/000244220500009
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595790
2018-07-24T12:57:55Z
conference_abstract
doc-type:other
Functional approach to memory deficits on hippocampal damage
Markowitsch, Hans J.
Markowitsch HJ. Functional approach to memory deficits on hippocampal damage. In: <em>Epilepsia</em>. EPILEPSIA. Vol 47. BLACKWELL PUBLISHING; 2006: 217-217.
BLACKWELL PUBLISHING
2006
http://purl.org/coar/resource_type/c_c94f
info:eu-repo/semantics/other
doc-type:other
text
https://pub.uni-bielefeld.de/record/1595790
eng
info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1528-1167.2006.00715_39.x
info:eu-repo/semantics/altIdentifier/issn/0013-9580
info:eu-repo/semantics/altIdentifier/wos/000243021800846
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595792
2018-07-24T12:58:13Z
journal_article
doc-type:article
Azide-analogous organophosphorus chemistry: RNP2 as a ligand and P-2 source
Azidanaloge Organophosphorchemie: RNP2 als Ligand und P2-Quelle
Weber, Lothar
cyclodiphosphanes
diphosphorus complexes
tungsten
niobium
Diels-Alder reactions
Weber L. Azide-analogous organophosphorus chemistry: RNP2 as a ligand and P-2 source. <em>Angewandte Chemie - International Edition in English</em>. 2007;46(6):830-832.
Wiley
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595792
eng
info:eu-repo/semantics/altIdentifier/doi/10.1002/anie.200604106
info:eu-repo/semantics/altIdentifier/issn/1433-7851
info:eu-repo/semantics/altIdentifier/issn/1521-3773
info:eu-repo/semantics/altIdentifier/wos/000244146500004
info:eu-repo/semantics/altIdentifier/pmid/17183519
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595807
2018-07-24T12:58:56Z
journal_article
doc-type:article
The lipopolysaccharide of Sinorhizobium meliloti suppresses defense-associated gene expression in cell cultures of the host plant Medicago truncatula
Tellstroem, Verena
Usadel, Bjoern
Thimm, Oliver
Stitt, Mark
Kuester, Helge
Niehaus, Karsten
Tellstroem V, Usadel B, Thimm O, Stitt M, Kuester H, Niehaus K. The lipopolysaccharide of Sinorhizobium meliloti suppresses defense-associated gene expression in cell cultures of the host plant Medicago truncatula. <em>Plant Physiology</em>. 2007;143(2):825-837.
In the establishment of symbiosis between Medicago truncatula and the nitrogen-fixing bacterium Sinorhizobium meliloti, the lipopolysaccharide (LPS) of the microsymbiont plays an important role as a signal molecule. It has been shown in cell cultures that the LPS is able to suppress an elicitor-induced oxidative burst. To investigate the effect of S. meliloti LPS on defense-associated gene expression, a microarray experiment was performed. For evaluation of the M. truncatula microarray datasets, the software tool MapMan, which was initially developed for the visualization of Arabidopsis (Arabidopsis thaliana) datasets, was adapted by assigning Medicago genes to the ontology originally created for Arabidopsis. This allowed functional visualization of gene expression of M. truncatula suspension-cultured cells treated with invertase as an elicitor. A gene expression pattern characteristic of a defense response was observed. Concomitant treatment of M. truncatula suspension-cultured cells with invertase and S. meliloti LPS leads to a lower level of induction of defense-associated genes compared to induction rates in cells treated with invertase alone. This suppression of defense-associated transcriptional rearrangement affects genes induced as well as repressed by elicitation and acts on transcripts connected to virtually all kinds of cellular processes. This indicates that LPS of the symbiont not only suppresses fast defense responses as the oxidative burst, but also exerts long-term influences, including transcriptional adjustment to pathogen attack. These data indicate a role for LPS during infection of the plant by its symbiotic partner.
AMER SOC PLANT BIOLOGISTS
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595807
eng
info:eu-repo/semantics/altIdentifier/doi/10.1104/pp.106.090985
info:eu-repo/semantics/altIdentifier/issn/0032-0889
info:eu-repo/semantics/altIdentifier/issn/1532-2548
info:eu-repo/semantics/altIdentifier/wos/000244032400025
info:eu-repo/semantics/altIdentifier/pmid/17220366
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595815
2018-07-24T12:57:55Z
journal_article
doc-type:article
Uncorrelated universe: Statistical anisotropy and the vanishing angular correlation function in WMAP years 1-3
Copi, Craig J.
Huterer, Dragan
Schwarz, Dominik ; https://orcid.org/0000-0003-2413-0881
Starkman, Glenn D.
Copi CJ, Huterer D, Schwarz D, Starkman GD. Uncorrelated universe: Statistical anisotropy and the vanishing angular correlation function in WMAP years 1-3. <em>PHYSICAL REVIEW D</em>. 2007;75(2): 023507.
The large-angle (low-l) correlations of the cosmic microwave background (CMB) as reported by the Wilkinson Microwave Anisotropy Probe (WMAP) after their first year of observations exhibited statistically significant anomalies compared to the predictions of the standard inflationary big-bang model. We suggested then that these implied the presence of a solar system foreground, a systematic correlated with solar system geometry, or both. We reexamine these anomalies for the data from the first three years of WMAP's operation. We show that, despite the identification by the WMAP team of a systematic correlated with the equinoxes and the ecliptic, the anomalies in the first-year internal linear combination (ILC) map persist in the three-year ILC map, in all-but-one case at similar statistical significance. The three-year ILC quadrupole and octopole therefore remain inconsistent with statistical isotropy - they are correlated with each other (99.6% C.L.), and there are statistically significant correlations with local geometry, especially that of the solar system. The angular two-point correlation function at scales > 60 deg in the regions outside the (kp0) galactic cut, where it is most reliably determined, is approximately zero in all wavebands and is even more discrepant with the best-fit Lambda CDM inflationary model than in the first-year data - 99.97% C.L. for the new ILC map. The full-sky ILC map, on the other hand, has a nonvanishing angular two-point correlation function, apparently driven by the region inside the cut, but which does not agree better with Lambda CDM. The role of the newly-identified low-l systematics is more puzzling than reassuring.
AMERICAN PHYSICAL SOC
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595815
eng
info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevD.75.023507
info:eu-repo/semantics/altIdentifier/issn/1550-7998
info:eu-repo/semantics/altIdentifier/issn/1550-2368
info:eu-repo/semantics/altIdentifier/wos/000243896300021
info:eu-repo/semantics/altIdentifier/arxiv/astro-ph/0605135
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595824
2018-07-24T12:58:13Z
journal_article
doc-type:article
Transport properties of magnetic tunnel junctions with Co2MnSi electrodes: The influence of temperature-dependent interface magnetization and electronic band structure
Schmalhorst, Jan-Michael ; https://orcid.org/0000-0003-1622-9726
Thomas, Andy ; https://orcid.org/0000-0001-8594-9060
Kaemmerer, S.
Schebaum, Oliver
Ebke, Daniel
Sacher, Marc
Reiss, Günter ; https://orcid.org/0000-0002-0918-5940
Hütten, Andreas
Turchanin, Andrey
Gölzhäuser, Armin ; https://orcid.org/0000-0002-0838-9028
Arenholz, E.
Schmalhorst J-M, Thomas A, Kaemmerer S, et al. Transport properties of magnetic tunnel junctions with Co2MnSi electrodes: The influence of temperature-dependent interface magnetization and electronic band structure. <em>PHYSICAL REVIEW B</em>. 2007;75(1): 14403.
The transport properties of Co2MnSi/AlOx/Co-Fe magnetic tunnel junctions showing a tunnel magnetorestistance of 95% at low temperatures are discussed with respect to temperature-dependent magnetic moments at the Co2MnSi/AlOx interface and electronic band structure effects. These junctions show a considerably larger temperature and bias voltage dependence of the tunneling magnetoresistance compared to Co-Fe-B/AlOx/Co-Fe-B junctions, although the effective spin polarization of Co2MnSi (66%) is larger than Co-Fe-B (60%). Especially, the tunnel magnetoresistance of the Co2MnSi based junctions becomes inverse for large bias voltages. With increasing atomic disorder of the interfacial Co2MnSi its magnetic moments decrease and show a stronger temperature dependence. Even for the best atomic ordering achieved the corresponding spin-wave parameters of Mn and Co at the Co2MnSi/AlOx interface are significantly larger than expected for Co2MnSi bulk and also larger than the spin-wave parameters of Co and Fe at a Co-Fe-B/AlOx interface. The influence of enhanced interfacial magnon excitation in the Co2MnSi/AlOx/Co-Fe junctions on their transport properties will be discussed as well as possible origins for the negative tunnel magnetoresistance at high bias voltages.
AMERICAN PHYSICAL SOC
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595824
eng
info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevB.75.014403
info:eu-repo/semantics/altIdentifier/issn/1098-0121
info:eu-repo/semantics/altIdentifier/issn/1550-235X
info:eu-repo/semantics/altIdentifier/wos/000243894600067
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595837
2018-07-24T12:58:43Z
journal_article
doc-type:article
Spin-polarization study of CO molecules adsorbed on Fe(110) using metastable-atom deexcitation spectroscopy and first-principles calculations
Sun, X.
Förster, S.
Li, Q. X.
Kurahashi, M.
Suzuki, T.
Zhang, J. W.
Yamauchi, Y.
Baum, Günter
Steidl, Hans
Sun X, Förster S, Li QX, et al. Spin-polarization study of CO molecules adsorbed on Fe(110) using metastable-atom deexcitation spectroscopy and first-principles calculations. <em>Phys.Rev.B</em>. 2007;75(3): 035419.
The spin-resolved electronic states of CO molecules adsorbed on Fe(110) surfaces are investigated using spin-polarized metastable-atom deexcitation spectroscopy (SPMDS) measurements and first-principles calculation. The existence of the adsorbate-induced 2 pi(*) state, which is partially filled by electron backdonation, is detected directly by SPMDS and reproduced by the calculation of local density of states and subtracted densities. Positive spin asymmetries for 4 sigma, 5 sigma/1 pi, and 2 pi(*) peaks observed in SPMDS spectra are well described by the calculated spin density and plane-averaged density of states, which indicate negative-spin polarization towards vacuum side even at the low CO coverage.
AMERICAN PHYSICAL SOC
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595837
eng
info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevB.75.035419
info:eu-repo/semantics/altIdentifier/issn/1098-0121
info:eu-repo/semantics/altIdentifier/issn/1550-235X
info:eu-repo/semantics/altIdentifier/wos/000243895400143
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595865
2020-10-29T20:21:35Z
journal_article
doc-type:article
Spatial variation of grazer effects on epilithic meiofauna and algae
Peters, Lars ; https://orcid.org/0000-0003-1106-044X
Hillebrand, Helmut
Traunspurger, Walter
herbivory
periphyton
indirect effects
algal biomass
macroinvertebrates
meiofauna
nematodes
spatial heterogeneity
Peters L, Hillebrand H, Traunspurger W. Spatial variation of grazer effects on epilithic meiofauna and algae. <em>JOURNAL OF THE NORTH AMERICAN BENTHOLOGICAL SOCIETY</em>. 2007;26(1):78-91.
Periphyton is a key component of shallow littoral zones of lakes and streams because it is an important source of primary production and a food resource for herbivores. Meiofauna are abundant in periphyton, but macroinvertebrate grazer (macrograzers) effects on periphytic meiofauna have not been studied so far. We used a spatially structured field experiment (hierarchical nested design consisting of 3 subsites at each of 3 sites) in Lake Erken (Sweden) to investigate the effect of macrograzers on epilithic meiofauna and algae in periphyton by controlling macrograzer access to littoral periphyton communities. Overall, we found a strong negative effect of macrograzer presence on algal biomass and some evidence for negative macrograzer effects on meiofaunal abundance and community composition. The impact of macrograzers on both algae and meiofauna were highly variable between sites and subsites. The largest spatial differences were for macrograzer effects on meiofaunal abundance and composition. We also investigated the ability of macrograzers to reduce spatial heterogeneity of periphyton biomass, but the presence of macrograzers did not alter the variation in algal biomass and associated meiofauna among replicates. We conclude that strong local variability in algal biomass and meiofauna abundance exists between neighboring sites even in the presence of strong overall macrograzer effects. This local variability could be based on factors known to cause spatial heterogeneity such as hydrodynamics, nutrients, substrate characteristics (size, texture, exposure), or biotic interactions.
NORTH AMER BENTHOLOGICAL SOC
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595865
eng
info:eu-repo/semantics/altIdentifier/doi/10.1899/0887-3593(2007)26[78:SVOGEO]2.0.CO;2
info:eu-repo/semantics/altIdentifier/issn/0887-3593
info:eu-repo/semantics/altIdentifier/issn/1937-237X
info:eu-repo/semantics/altIdentifier/wos/000243960700008
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595869
2018-07-24T12:58:56Z
journal_article
doc-type:article
Mutation, selection, and ancestry in branching models: a variational approach
Baake, Ellen
Georgii, Hans-Otto
mutation-selection models
quasispecies model
large deviations
variational analysis
branching processes
Baake E, Georgii H-O. Mutation, selection, and ancestry in branching models: a variational approach. <em>JOURNAL OF MATHEMATICAL BIOLOGY</em>. 2007;54(2):257-303.
We consider the evolution of populations under the joint action of mutation and differential reproduction, or selection. The population is modelled as a finite-type Markov branching process in continuous time, and the associated genealogical tree is viewed both in the forward and the backward direction of time. The stationary type distribution of the reversed process, the so-called ancestral distribution, turns out as a key for the study of mutation-selection balance. This balance can be expressed in the form of a variational principle that quantifies the respective roles of reproduction and mutation for any possible type distribution. It shows that the mean growth rate of the population results from a competition for a maximal long-term growth rate, as given by the difference between the current mean reproduction rate, and an asymptotic decay rate related to the mutation process; this tradeoff is won by the ancestral distribution. We then focus on the case when the type is determined by a sequence of letters (like nucleotides or matches/mismatches relative to a reference sequence), and we ask how much of the above competition can still be seen by observing only the letter composition (as given by the frequencies of the various letters within the sequence). If mutation and reproduction rates can be approximated in a smooth way, the fitness of letter compositions resulting from the interplay of reproduction and mutation is determined in the limit as the number of sequence sites tends to infinity. Our main application is the quasispecies model of sequence evolution with mutation coupled to reproduction but independent across sites, and a fitness function that is invariant under permutation of sites. In this model, the fitness of letter compositions is worked out explicitly. In certain cases, their competition leads to a phase transition.
SPRINGER
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595869
eng
info:eu-repo/semantics/altIdentifier/doi/10.1007/s00285-006-0039-5
info:eu-repo/semantics/altIdentifier/issn/0303-6812
info:eu-repo/semantics/altIdentifier/issn/1432-1416
info:eu-repo/semantics/altIdentifier/wos/000243906600005
info:eu-repo/semantics/altIdentifier/pmid/17075709
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595873
2019-04-30T14:14:12Z
conference
doc-type:conferenceObject
Classical capacity of classical-quantum arbitrarily varying channels
Ahlswede, Rudolf
Blinovsky, Vladimir
arbitarily varying channel
capacity
average probability of the decoding error
quantum channel
Ahlswede R, Blinovsky V. Classical capacity of classical-quantum arbitrarily varying channels. In: <em>IEEE Transactions on Information Theory</em>. IEEE TRANSACTIONS ON INFORMATION THEORY. Vol 53. IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC; 2007: 526-533.
We prove that the average error classical capacity C(IN) of a classical-quantum arbitrarily varying channel (cq-AVC) W equals 0 or else the random code capacity C (Ahlswede's dichotomy). We also establish a necessary and sufficient condition for C(W) > 0.
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
2007
http://purl.org/coar/resource_type/c_5794
info:eu-repo/semantics/conferenceObject
doc-type:conferenceObject
text
https://pub.uni-bielefeld.de/record/1595873
eng
info:eu-repo/semantics/altIdentifier/doi/10.1109/TIT.2006.889004
info:eu-repo/semantics/altIdentifier/issn/0018-9448
info:eu-repo/semantics/altIdentifier/wos/000243953400006
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595895
2018-07-24T12:58:56Z
journal_article
doc-type:article
Clinical outcome and costs of nosocomial and community-acquired Staphylococcus aureus bloodstream infection in haemodialysis patients
Greiner, Wolfgang
Rasch, A.
Koehler, D.
Salzberger, B.
Faetkenheuer, G.
Leidig, M.
haemodialysis
MRSA
renal failure
Staphyloccocus aureus
bacteraemia
cost of illness
Greiner W, Rasch A, Koehler D, Salzberger B, Faetkenheuer G, Leidig M. Clinical outcome and costs of nosocomial and community-acquired Staphylococcus aureus bloodstream infection in haemodialysis patients. <em>CLINICAL MICROBIOLOGY AND INFECTION</em>. 2007;13(3):264-268.
The main aim of this study was to evaluate the clinical outcome and costs of nosocomial and community-acquired methicillin-susceptible Staphylococcus aureus (MSSA) or methicillin-resistant S. aureus (MRSA) bloodstream infection (BSI) in patients undergoing haemodialysis. A multicentre retrospective study was conducted that included 109 patients with end-stage renal disease and S. aureus BSI who were hospitalised in three German centres between 1999 and 2005. Nosocomial and community-acquired infections were analysed separately with regard to costs and outcome. Forty-nine (45%) patients had nosocomial infection. Compared to patients with community-acquired infection, these patients were more likely to have had BSI caused by MRSA (40.8% vs. 13.3%, p < 0.05). BSI was the initial reason for admission for 33 (55%) patients who had community-acquired infection. The mean length of hospitalisation was 24 days for patients with community-acquired infection and 51 days for patients with nosocomial infection (p < 0.05). Costs per treatment episode were 20 024 Euros for nosocomial infection vs. 9554 Euros for community-acquired infection (p < 0.05). The average treatment costs for patients with MSSA BSI were < 50% of those for patients with MRSA BSI (10 573 vs. 24 931 Euros, p < 0.05). S. aureus BSI is an underlying cause of substantial health risk and high morbidity among the haemodialysis-dependent population, who are already at high-risk for other reasons. This study also highlighted differences according to the source of BSI, including costs arising from hospitalisation and treatment.
BLACKWELL PUBLISHING
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595895
eng
info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1469-0691.2006.01622.x
info:eu-repo/semantics/altIdentifier/issn/1198-743X
info:eu-repo/semantics/altIdentifier/issn/1469-0691
info:eu-repo/semantics/altIdentifier/wos/000243975900006
info:eu-repo/semantics/altIdentifier/pmid/17391380
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595903
2018-07-24T12:58:57Z
journal_article
doc-type:article
High thermal stability of cross-linked aromatic self-assembled monolayers: Nanopatterning via selective thermal desorption
Turchanin, Andrey
El-Desawy, Mohamed
Gölzhäuser, Armin ; https://orcid.org/0000-0002-0838-9028
Turchanin A, El-Desawy M, Gölzhäuser A. High thermal stability of cross-linked aromatic self-assembled monolayers: Nanopatterning via selective thermal desorption. <em>Applied Physics Letters</em>. 2007;90(5): 053102.
An extremely high thermal stability of electron cross-linked biphenyl self-assembled monolayers (SAMs) is reported. The authors found that pristine biphenylthiol SAMs desorb at similar to 400 K from gold surfaces, which is induced by a breaking of C-S bonds. Despite of a similar bond cleavage in cross-linked SAMs, these remain on the surface up to 1000 K, which is the highest temperature reported for a SAM. When patterns of pristine and cross-linked SAMs are heated, the pristine regions desorb, and the cross-linked regions remain on the surface. The authors show that this thermal desorption lithography can be utilized for the fabrication of molecular surface nanostructures.
AMER INST PHYSICS
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595903
eng
info:eu-repo/semantics/altIdentifier/doi/10.1063/1.2437091
info:eu-repo/semantics/altIdentifier/issn/0003-6951
info:eu-repo/semantics/altIdentifier/wos/000243977300077
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595908
2018-07-24T12:58:57Z
journal_article
doc-type:article
Novel macrolide resistance module carried by the IncP-1 beta resistance plasmid pRSB111, isolated from a wastewater treatment plant
Szczepanowski, Rafael
Krahn, Irene
Bohn, Nadine
Pühler, Alfred ; https://orcid.org/0000-0003-4723-2960
Schlueter, Andreas
Szczepanowski R, Krahn I, Bohn N, Pühler A, Schlueter A. Novel macrolide resistance module carried by the IncP-1 beta resistance plasmid pRSB111, isolated from a wastewater treatment plant. <em>ANTIMICROBIAL AGENTS AND CHEMOTHERAPY</em>. 2007;51(2):673-678.
The macrolide resistance plasmid pRSB111 was isolated from bacteria residing in the final effluents of a wastewater treatment plant. The 47-kb plasmid confers resistance to azithromycin, clarithromycin, erythromycin, roxithromycin, and tylosin when it is carried by Pseudomonas sp. strain B13 and is very similar to prototype IncP-1 beta plasmid pB3, which was previously isolated from an activated-sludge bacterial community of a wastewater treatment plant. The two plasmids differ in their accessory regions, located downstream of the conjugative transfer module gene traC. Nucleotide sequence analysis of the pRSB111 accessory region revealed that it contains a new macrolide resistance module composed of the genes mphR(E), mph(E), and mrx(E), which putatively encode a transcriptional regulator, a macrolide phosphotransferase, and a transmembrane transport protein, respectively. Analysis of the contributions of the individual genes of the macrolide resistance module revealed that mph(E) and mrx(E) are required for high-level macrolide resistance. The resistance genes are flanked by two insertion sequences, namely, 1SPa15 and ISRSB111. Two truncated transposable elements, IS6100 and remnants of a Tn3-like transposon, were identified in the vicinity of ISRSB111. The accessory element of pRSB111 apparently replaced the Tn402-like element present on the sister plasmid, pB3, as suggested by the conservation of Tn402-specific terminal inverted repeats on pRSB111.
AMER SOC MICROBIOLOGY
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595908
eng
info:eu-repo/semantics/altIdentifier/doi/10.1128/AAC.00802-06
info:eu-repo/semantics/altIdentifier/issn/0066-4804
info:eu-repo/semantics/altIdentifier/issn/1098-6596
info:eu-repo/semantics/altIdentifier/wos/000243900600038
info:eu-repo/semantics/altIdentifier/pmid/17101677
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595920
2018-07-24T12:58:13Z
journal_article
doc-type:article
Nematodes in wastewater biofilms - Appearance and density of species in three biofilter reactors
Bergtold, M.
Mayr, G.
Traunspurger, Walter
nematodes
biofilm
population dynamics
species
biofilter
composition
wastewater
Bergtold M, Mayr G, Traunspurger W. Nematodes in wastewater biofilms - Appearance and density of species in three biofilter reactors. <em>WATER RESEARCH</em>. 2007;41(1):145-151.
Population dynamics of nematode species in biofilms of three different biofilter reactors, differing in size (pilot/laboratory scale), operation mode and biofilm carrier, were studied over a period of 1 year. In the biofilm. suspension of the pilot system mean nematode density was 118 individuals/ml and average biomass 15 mu g wet weight/ml. Higher mean abundance was found in the two laboratory systems with 2380 and 4411 individuals/ml. Mean biomass in the laboratory systems ranged from 209 to 330 mu g wet weight/ml. There were marked temporal differences in appearance and density of nematode species in all three biofilters. Number of species observed was 3 in the laboratory systems and 5 in the pilot system. The fastest growing species (Paroigolaimella bernensis and Diplogasteritus nudicapitatus) were observed in the pilot reactor in contrast to the more slowly growing species (Diploscapter coronatus and Acrostichus sp.), which dominated in the laboratory reactors. Sexual reproduction was found for all species but of Diploscapter coronatus. When comparing life history traits of the different species with the environmental conditions in the reactors, it seems that the unstable conditions in the pilot reactor favor the fast growing species whereas the stable environment in the laboratory systems allows the growth of species with longer generation times. (c) 2006 Elsevier Ltd. All rights reserved.
PERGAMON-ELSEVIER SCIENCE LTD
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595920
eng
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.watres.2006.09.023
info:eu-repo/semantics/altIdentifier/issn/0043-1354
info:eu-repo/semantics/altIdentifier/wos/000243692100019
info:eu-repo/semantics/altIdentifier/pmid/17098276
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595931
2021-03-10T15:26:19Z
review
doc-type:review
Rolf, Malte: Das sowjetische Massenfest. Hamburg: Hamburger Edition, 2006
Häfner, Lutz ; https://orcid.org/0000-0002-8641-943X
Häfner L. Rolf, Malte: Das sowjetische Massenfest. Hamburg: Hamburger Edition, 2006. <em>Russian Review</em>. 2007;66(1):158-159.
Blackwell Publ.
2007
http://purl.org/coar/resource_type/c_efa0
info:eu-repo/semantics/review
doc-type:review
text
https://pub.uni-bielefeld.de/record/1595931
eng
info:eu-repo/semantics/altIdentifier/issn/0036-0341
info:eu-repo/semantics/altIdentifier/wos/000243460300038
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595933
2018-07-24T12:58:43Z
journal_article
doc-type:article
Noncatalytic thermocouple coatings produced with chemical vapor deposition for flame temperature measurements
Bahlawane, Naoufal ; https://orcid.org/0000-0003-1094-2512
Struckmeier, Ulf
Kasper, Tina S.
Oßwald, Patrick ; https://orcid.org/0000-0002-2257-2988
Bahlawane N, Struckmeier U, Kasper TS, Oßwald P. Noncatalytic thermocouple coatings produced with chemical vapor deposition for flame temperature measurements. <em>REVIEW OF SCIENTIFIC INSTRUMENTS</em>. 2007;78(1): 013905.
Chemical vapor deposition (CVD) and metal-organic chemical vapor deposition (MOCVD) have been employed to develop alumina thin films in order to protect thermocouples from catalytic overheating in flames and to minimize the intrusion presented to the combustion process. Alumina films obtained with a CVD process using AlCl3 as the precursor are dense, not contaminated, and crystallize in the corundum structure, while MOCVD using Al(acetyl acetone)(3) allows the growth of corundum alumina with improved growth rates. These films, however, present a porous columnar structure and show some carbon contamination. Therefore, coated thermocouples using AlCl3-CVD were judged more suitable for flame temperature measurements and were tested in different fuels over a typical range of stoichiometries. Coated thermocouples exhibit satisfactory measurement reproducibility, no temporal drifts, and do not suffer from catalytic effects. Furthermore, their increased radiative heat loss (observed by infrared spectroscopy) allows temperature measurements over a wider range when compared to uncoated thermocouples. A flame with a well-known temperature profile established with laser-based techniques was used to determine the radiative heat loss correction to account for the difference between the apparent temperature measured by the coated thermocouple and the true flame temperature. The validity of the correction term was confirmed with temperature profile measurements for several flames previously studied in different laboratories with laser-based techniques. (c) 2007 American Institute of Physics.
AMER INST PHYSICS
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595933
eng
info:eu-repo/semantics/altIdentifier/doi/10.1063/1.2426876
info:eu-repo/semantics/altIdentifier/issn/0034-6748
info:eu-repo/semantics/altIdentifier/wos/000243892300033
info:eu-repo/semantics/altIdentifier/pmid/17503931
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595939
2018-07-24T12:58:57Z
journal_article
doc-type:article
Molecular basics of mycorrhizal symbioses
Pühler, Alfred ; https://orcid.org/0000-0003-4723-2960
Strack, Dieter
Pühler A, Strack D. Molecular basics of mycorrhizal symbioses. <em>PHYTOCHEMISTRY</em>. 2007;68(1):6-7.
PERGAMON-ELSEVIER SCIENCE LTD
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595939
eng
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.phytochem.2006.09.001
info:eu-repo/semantics/altIdentifier/issn/0031-9422
info:eu-repo/semantics/altIdentifier/wos/000243801200001
info:eu-repo/semantics/altIdentifier/pmid/17097696
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595943
2018-07-24T12:58:50Z
journal_article
doc-type:article
Identification and expression regulation of symbiotically activated legume genes
Küster, Helge
Vieweg, Martin F.
Manthey, Katja
Baier, Markus
Hohnjec, Natalija
Perlick, Andreas M.
transcriptome profiling
arbuscular mycorrhiza
promoter analysis
microarray-based expression profiling
Vicia faba
symbiosin genes
transgenic hairy roots
root nodule
in silico
Medicago truncatula
Küster H, Vieweg MF, Manthey K, Baier M, Hohnjec N, Perlick AM. Identification and expression regulation of symbiotically activated legume genes. <em>Phytochemistry</em>. 2007;68(1):8-18.
Legume plants are able to enter two different endosymbioses with soil prokaryotes and soil fungi, leading to nitrogen-fixing root nodules and to arbuscular mycorrhiza (AM), respectively. We applied in silico and microarray-based transcriptome profiling approaches to uncover the transcriptome of developing root nodules and AM roots of the model legume Medicago truncatula. Several hundred genes were found to be activated in different stages of either symbiosis, with almost 100 genes being co-induced during nodulation and in arbuscular mycorrhiza. These co-induced genes can be associated with different cellular functions required for symbiotic efficiency, such as the facilitation of transport processes across the perisymbiotic membranes that surround the endosymbiotic bacteroids in root nodules and the arbuscules in AM roots. To specify promoter elements required for gene expression in arbuscule-containing cells, reporter gene fusions of the promoter of the Vicia faba leghemoglobin gene VfLb29 were studied by loss-of-function and gain-of-function approaches in transgenic hairy roots. These analyses specified a 85-bp fragment that was necessary for gene expression in arbuscule-containing cells but was dispensible for gene activation in root nodules. In contrast to promoters mediating gene expression in the infected cells of root nodules, the activation of genes in AM appears to be governed by more complex regulatory systems requiring different promoter modules. (c) 2006 Elsevier Ltd. All rights reserved.
Elsevier
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595943
eng
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.phytochem.2006.09.029
info:eu-repo/semantics/altIdentifier/issn/0031-9422
info:eu-repo/semantics/altIdentifier/wos/000243801200002
info:eu-repo/semantics/altIdentifier/pmid/17081575
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595972
2018-07-24T12:58:57Z
journal_article
doc-type:article
Sugar for my honey: Carbohydrate partitioning in ectomycorrhizal symbiosis
Nehls, Uwe
Grunze, Nina
Willmann, Martin
Reich, Marlis
Kuester, Helge
gene expression
ectomycorrhiza
poplar
Amanita
sugar regulation
Nehls U, Grunze N, Willmann M, Reich M, Kuester H. Sugar for my honey: Carbohydrate partitioning in ectomycorrhizal symbiosis. <em>PHYTOCHEMISTRY</em>. 2007;68(1):82-91.
Simple, readily utilizable carbohydrates, necessary for growth and maintenance of large numbers of microbes are rare in forest soils. Among other types of mutualistic interactions, the formation of ectomycorrhizas, a symbiosis between tree roots and certain soil fungi, is a way to overcome nutrient and carbohydrate limitations typical for many forest ecosystems. Ectomycorrhiza formation is typical for trees in boreal and temperate forests of the northern hemisphere and alpine regions world-wide. The main function of this symbiosis is the exchange of fungus-derived nutrients for plant-derived carbohydrates, enabling the colonization of mineral nutrient-poor environments. In ectomycorrhizal symbiosis up to 1/3 of plant photoassimilates could be transferred toward the fungal partner. The creation of such a strong sink is directly related to the efficiency of fungal hexose uptake at the plant/fungus interface, a modulated fungal carbohydrate metabolism in the ectomycorrhiza, and the export of carbohydrates towards soil growing hyphae. However, not only the fungus but also the plant partner increase its expression of hexose importer genes at the plant/fungus interface. This increase in hexose uptake capacity of plant roots in combination with an increase in photosynthesis may explain how the plant deals with the growing fungal carbohydrate demand in symbiosis and how it can restrict this loss of carbohydrates under certain conditions to avoid fungal parasitism. (c) 2006 Elsevier Ltd. All rights reserved.
PERGAMON-ELSEVIER SCIENCE LTD
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595972
eng
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.phytochem.2006.09.024
info:eu-repo/semantics/altIdentifier/issn/0031-9422
info:eu-repo/semantics/altIdentifier/wos/000243801200009
info:eu-repo/semantics/altIdentifier/pmid/17078984
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1595994
2018-07-24T12:58:13Z
journal_article
doc-type:article
Quantum dynamical semigroups for finite and infinite Bose systems
Blanchard, Philippe
Hellmich, M.
Lugiewicz, P.
Olkiewicz, R.
Blanchard P, Hellmich M, Lugiewicz P, Olkiewicz R. Quantum dynamical semigroups for finite and infinite Bose systems. <em>JOURNAL OF MATHEMATICAL PHYSICS</em>. 2007;48(1):012106.
A new class of quasifree quantum Markov semigroups on C-*-algebras of canonical commutation relations is introduced and discussed. Two applications to decoherence in the Heisenberg representation are given. In the first one the dynamical semigroup which leads to the appearance of decoherence induced superselection rules corresponding to the boundary conditions of a quantum particle in a finite interval is considered. The second example analyzes the possibility of the transition from infinite systems to systems with a finite number of degrees of freedom. (c) 2007 American Institute of Physics.
AMER INST PHYSICS
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1595994
eng
info:eu-repo/semantics/altIdentifier/doi/10.1063/1.2406053
info:eu-repo/semantics/altIdentifier/issn/0022-2488
info:eu-repo/semantics/altIdentifier/wos/000243891500006
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596000
2018-07-24T12:58:13Z
conference_abstract
doc-type:other
Impact of Staphylococcus aureus nasal carriage of surgeons on infections of their patients
Kipp, F.
Wallmeier, N.
Koller, A.
Becker, K.
Hornberg, Claudia
Wetz, H. H.
Peters, G.
von Eiff, C.
Kipp F, Wallmeier N, Koller A, et al. Impact of Staphylococcus aureus nasal carriage of surgeons on infections of their patients. <em>INTERNATIONAL JOURNAL OF MEDICAL MICROBIOLOGY</em>. 2006;296(Suppl. 42):60.
ELSEVIER GMBH, URBAN & FISCHER VERLAG
2006
http://purl.org/coar/resource_type/c_c94f
info:eu-repo/semantics/other
doc-type:other
text
https://pub.uni-bielefeld.de/record/1596000
eng
info:eu-repo/semantics/altIdentifier/issn/1438-4221
info:eu-repo/semantics/altIdentifier/wos/000241442600023
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596017
2018-07-24T12:58:13Z
conference_abstract
doc-type:other
Genome comparison of non-pathogenic and pathogenic meningococci
Schoen, C.
Claus, H.
Goesmann, Alexander ; https://orcid.org/0000-0002-7086-2568
Mueller, T.
Brandt, P.
Otto-Karg, I.
Schramm-Glueck, A.
Vogel, U.
Frosch, M.
Schoen C, Claus H, Goesmann A, et al. Genome comparison of non-pathogenic and pathogenic meningococci. <em>INTERNATIONAL JOURNAL OF MEDICAL MICROBIOLOGY</em>. 2006;296(Suppl. 42):134.
ELSEVIER GMBH, URBAN & FISCHER VERLAG
2006
http://purl.org/coar/resource_type/c_c94f
info:eu-repo/semantics/other
doc-type:other
text
https://pub.uni-bielefeld.de/record/1596017
eng
info:eu-repo/semantics/altIdentifier/issn/1438-4221
info:eu-repo/semantics/altIdentifier/wos/000241442600240
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596036
2018-07-24T12:58:13Z
journal_article
doc-type:article
Ultrafast magnetization dynamics probed by anisotropic magnetoresistance
Schumacher, H. W.
Serrano-Guisan, S.
Rott, Karsten
Reiss, Günter ; https://orcid.org/0000-0002-0918-5940
Schumacher HW, Serrano-Guisan S, Rott K, Reiss G. Ultrafast magnetization dynamics probed by anisotropic magnetoresistance. <em>APPLIED PHYSICS LETTERS</em>. 2007;90(4):042504.
The authors use time resolved measurements of the anisotropic magnetoresistance (AMR) to study ultrafast magnetization dynamics of microstructured disks of Permalloy. The devices show an AMR of the order of 0.25% revealing the characteristic cos(2) angular dependence. From the time resolved AMR the authors derive the in plane angular excursion of the magnetization with angular resolution down to 1 degrees. From the decay of the homogeneous precession the authors derive a Gilbert damping parameter of 0.008 +/- 0.001. This technique can be applied to study magnetization precession and damping in individual micropatterned devices of a wide variety of magnetic thin film and multilayer materials. (c) 2007 American Institute of Physics.
AMER INST PHYSICS
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596036
eng
info:eu-repo/semantics/altIdentifier/doi/10.1063/1.2433759
info:eu-repo/semantics/altIdentifier/issn/0003-6951
info:eu-repo/semantics/altIdentifier/wos/000243789600054
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596042
2018-07-24T12:58:50Z
journal_article
doc-type:article
Photochemistry of arenes- Reloaded
Mattay, Jochen
arenes
photochemistry
photocycloaddition
naphthalenes
Mattay J. Photochemistry of arenes- Reloaded. <em>ANGEWANDTE CHEMIE-INTERNATIONAL EDITION</em>. 2007;46(5):663-665.
WILEY-V C H VERLAG GMBH
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596042
eng
info:eu-repo/semantics/altIdentifier/doi/10.1002/anie.200603337
info:eu-repo/semantics/altIdentifier/issn/1433-7851
info:eu-repo/semantics/altIdentifier/issn/1521-3773
info:eu-repo/semantics/altIdentifier/wos/000243855500003
info:eu-repo/semantics/altIdentifier/pmid/17143914
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596045
2018-07-24T12:58:57Z
journal_article
doc-type:article
Synthesis of a benzoannelated spheriphane (globular cyclophane) on the way to potential precursors of C-60-fullerene
Nierle, Jens
Kuck, Dietmar
Heck reaction
benzoannulation
dehalogenation
photochemistry
cyclophanes
biaryl hydrocarbons
cross-coupling reactions
Nierle J, Kuck D. Synthesis of a benzoannelated spheriphane (globular cyclophane) on the way to potential precursors of C-60-fullerene. <em>SYNLETT</em>. 2006;2006(18):2914-2920.
A viable route to the novel globular cyclophane 2, a C48H36-spheriphane, is presented as a result of our research aimed at the synthesis of the hypothetical deciphenyl 3, a C60H36-sphcriphane, which has been envisaged as a potential precursor to C-60-fullerene. Several syntheses of the key intermediate of the route to 2, viz. septiphenyl 13 (C48H42), a sterically crowded 1,3,5-tris(ortho-biphenylyl)benzene derivative, are described. These include threefold Heck coupling and related threefold Pd(0)-catalyzed C-C cross-coupling reactions, as well as threefold benzoannelation involving tetrachlorothiophene-S,S-dioxide and PET-induced dehalogenation of highly chlorinated septiphenyl derivatives.
GEORG THIEME VERLAG KG
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596045
eng
info:eu-repo/semantics/altIdentifier/doi/10.1055/s-2006-951497
info:eu-repo/semantics/altIdentifier/issn/0936-5214
info:eu-repo/semantics/altIdentifier/issn/1437-2096
info:eu-repo/semantics/altIdentifier/wos/000243619600007
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596065
2018-07-24T12:57:55Z
journal_article
doc-type:article
Photoemission from solid surfaces in intense laser fields
Faisal, Farhad
Kaminmski, J. Z.
Saczuk, E.
Faisal F, Kaminmski JZ, Saczuk E. Photoemission from solid surfaces in intense laser fields. <em>LASER PHYSICS</em>. 2006;16(2):284-288.
We present a Floquet analysis of photoemission of electrons from a solid surface due to its interaction with a laser beam. The method we use is based on a three-dimensional quasifree electron model. The model takes account of the changes in the effective mass of the electron inside and outside the solid and in the reflected and refracted beams due to the presence of the surface. It is shown that the photoemission of electrons from the solid surface may take place not only with no absorption of photons but also along with the emission of extra photons.
MAIK NAUKA/INTERPERIODICA/SPRINGER
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596065
eng
info:eu-repo/semantics/altIdentifier/doi/10.1134/S1054660X06020137
info:eu-repo/semantics/altIdentifier/issn/1054-660X
info:eu-repo/semantics/altIdentifier/issn/1555-6611
info:eu-repo/semantics/altIdentifier/wos/000243784900013
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596070
2018-07-24T12:58:43Z
journal_article
doc-type:article
Transient palladadiphosphanylcarbenes: Singlet carbenes with an "inverse" electronic configuration (p(pi)(2) instead of sigma(2)) and unusual transannular metal-carbene interactions (pi(C -> Pd) donation and sigma(Pd -> C) back-donation)
Vignolle, Joan
Gornitzka, Heinz
Maron, Laurent
Schoeller, Wolfgang
Bourissou, Didier
Bertrand, Guy
Vignolle J, Gornitzka H, Maron L, Schoeller W, Bourissou D, Bertrand G. Transient palladadiphosphanylcarbenes: Singlet carbenes with an "inverse" electronic configuration (p(pi)(2) instead of sigma(2)) and unusual transannular metal-carbene interactions (pi(C -> Pd) donation and sigma(Pd -> C) back-donation). <em>JOURNAL OF THE AMERICAN CHEMICAL SOCIETY</em>. 2007;129(4):978-985.
Upon treatment with [PdCl(allyl)](2), asymmetrically substituted alpha,alpha'-diphosphanyl diazo compounds eliminate dinitrogen to afford C-chlorodiphosphanylmethanide complexes in high yields. In the presence of a chloride-abstracting agent, such as sodium tetraphenylborate, the C-chlorodiphosphanylmethanide complexes react with pyridine and trimethylphosphine, readily affording the corresponding nitrogen and phosphorus ylides. The postulated intermediate in this process, namely palladadiphosphanylcarbenes, could not be spectroscopically characterized, but their transient formation was chemically supported further by a Lewis base exchange reaction between pyridine and 4-dimethylaminopyridine. This hypothesis has also been substantiated by computing the corresponding dissociation energy using two model systems featuring methyl groups at the phosphorus. Of particular interest, density functional theory calculations reveal that these palladadiphosphanylcarbenes have a singlet ground state with an "inverse" p(pi)(2) electronic configuration and a distorted geometry associated with unusual transannular metal-carbene interactions (pi(C -> Pd) donation and sigma(Pd -> C) back-donation).
AMER CHEMICAL SOC
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596070
eng
info:eu-repo/semantics/altIdentifier/doi/10.1021/ja066738j
info:eu-repo/semantics/altIdentifier/issn/0002-7863
info:eu-repo/semantics/altIdentifier/issn/1520-5126
info:eu-repo/semantics/altIdentifier/wos/000243683800051
info:eu-repo/semantics/altIdentifier/pmid/17243835
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596078
2018-07-24T12:58:50Z
journal_article
doc-type:article
Dynamics of unfolded polypeptide chains in crowded environment studied by fluorescence correlation spectroscopy
Neuweiler, Hannes
Löllmann, Marc
Doose, Sören
Sauer, Markus
unfolded polypeptides
molecular crowding
fluorescence quenching
fluorescence correlation spectroscopy
intrachain diffusion
Neuweiler H, Löllmann M, Doose S, Sauer M. Dynamics of unfolded polypeptide chains in crowded environment studied by fluorescence correlation spectroscopy. <em>JOURNAL OF MOLECULAR BIOLOGY</em>. 2007;365(3):856-869.
Proteins have evolved to fold and function within a cellular environment that is characterized by high macromolecular content. The earliest step of protein folding represents intrachain contact formation of amino acid residues within an unfolded polypeptide chain. It has been proposed that macromolecular crowding can have significant effects on rates and equilibria of biomolecular processes. However, the kinetic consequences on intrachain diffusion of polypeptides, have not been tested experimentally, yet. Here, we demonstrate that selective fluorescence quenching of the oxazine fluorophore MR121 by the amino acid tryptophan (Trp) in combination with fast fluorescence correlation spectroscopy (FCS) can be used to monitor end-to-end contact formation rates of unfolded polypeptide chains. MR121 and Trp were incorporated at the terminal ends of polypeptides. consisting of repetitive units of glycine (G) and serine (S) residues. End-to-end contact formation and dissociation result in "off" and "on" switching of MR121 fluorescence and underlying kinetics can be revealed in FCS experiments with nanosecond time resolution. We revisit previous experimental studies concerning the dependence of end-to-end contact formation rates on polypeptide chain length, showing that kinetics can be described by Gaussian chain theory. We further investigate effects of solvent viscosity and temperature on contact formation rates demonstrating that intrachain diffusion represents a purely diffusive, entropy-controlled process. Finally, we study the influence of macromolecular crowding on polypepticle chain dynamics. The data presented demonstrate that intrachain diffusion is fast in spite of hindered diffusion caused by repulsive interactions with macromolecules. Findings can be explained by effects of excluded volume reducing chain entropy and therefore accelerating the loop search process. Our results suggest that within a cellular environment the early formation of structural elements in k unfolded proteins can still proceed quite efficiently in spite of hindered L diffusion caused by high macromolecular content. (c) 2006 Elsevier Ltd. All rights reserved.
ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596078
eng
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jmb.2006.10.021
info:eu-repo/semantics/altIdentifier/issn/0022-2836
info:eu-repo/semantics/altIdentifier/wos/000243561500028
info:eu-repo/semantics/altIdentifier/pmid/17084857
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596097
2018-07-24T12:58:50Z
journal_article
doc-type:article
Solvent effect on reductive bond cleavage of 1-chloro-10-methyltribenzotriquinacene: Change from the concerted to the stepwise mechanism
Jaworski, Jan S.
Cembor, Marek
Kuck, Dietmar
cyclic voltammetry
bond cleavage
concerted mechanism
centropolyindanes
radical anions
Jaworski JS, Cembor M, Kuck D. Solvent effect on reductive bond cleavage of 1-chloro-10-methyltribenzotriquinacene: Change from the concerted to the stepwise mechanism. <em>ELECTROCHIMICA ACTA</em>. 2007;52(5):2196-2202.
Electrochemical reduction of 1-chloro-10-methyltribenzotriquinacene in benzonitrile, acetonitrile and NN-dimethylformamide (DNIF) is compared. A two-electron DISP1 mechanism was found in C6H5CN at glassy carbon and mercury electrodes with C-Cl bond cleavage as the rate determining step. In CH3CN and DNIF the hydrogen atom abstraction from solvent molecules by a radical formed in bond cleavage results in the one-electron process. In the above-mentioned solvents an analysis of a potential dependence of the transfer coefficient, obtained from convoluted voltammetric curves at mercury electrode, showed the concerted mechanism. A change from the stepwise process in C6H5CN to the concerted one in CH3CN and DNIF is explained by acceleration of bond cleavage in the radical anion due to stronger solvation of product chloride anions by CH3CN and DMF. (c) 2006 Elsevier Ltd. All rights reserved.
PERGAMON-ELSEVIER SCIENCE LTD
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596097
eng
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.electacta.2006.08.036
info:eu-repo/semantics/altIdentifier/issn/0013-4686
info:eu-repo/semantics/altIdentifier/wos/000243647700048
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596102
2018-07-24T12:58:43Z
journal_article
doc-type:article
ddc:570
journal_articleFtxt
open_access
The alternative sigma factor SigB of Corynebacterium glutamicum modulates global gene expression during transition from exponential growth to stationary phase
Larisch, Christof
Nakunst, Diana
Hueser, Andrea T.
Tauch, Andreas
Kalinowski, Jörn
ddc:570
Larisch C, Nakunst D, Hueser AT, Tauch A, Kalinowski J. The alternative sigma factor SigB of Corynebacterium glutamicum modulates global gene expression during transition from exponential growth to stationary phase. <em>BMC Genomics</em>. 2007;8(1): 4.
Background: Corynebacterium glutamicum is a gram-positive soil bacterium widely used for the industrial production of amino acids. There is great interest in the examination of the molecular mechanism of transcription control. One of these control mechanisms are sigma factors. C. glutamicum ATCC 13032 has seven putative sigma factor-encoding genes, including sigA and sigB. The sigA gene encodes the essential primary sigma factor of C. glutamicum and is responsible for promoter recognition of house-keeping genes. The sigB gene codes for the non-essential sigma factor SigB that has a proposed role in stress reponse. Results: The sigB gene expression was highest at transition between exponential growth and stationary phase, when the amount of sigA mRNA was already decreasing. Genome-wide transcription profiles of the wild-type and the sigB mutant were recorded by comparative DNA microarray hybridizations. The data indicated that the mRNA levels of 111 genes are significantly changed in the sigB-proficient strain during the transition phase, whereas the expression profile of the sigB-deficient strain showed only minor changes ( 26 genes). The genes that are higher expressed during transition phase only in the sigB-proficient strain mainly belong to the functional categories amino acid metabolism, carbon metabolism, stress defense, membrane processes, and phosphorus metabolism. The transcription start points of six of these genes were determined and the deduced promoter sequences turned out to be indistinguishable from that of the consensus promoter recognized by SigA. Real-time reverse transcription PCR assays revealed that the expression profiles of these genes during growth were similar to that of the sigB gene itself. In the sigB mutant, however, the transcription profiles resembled that of the sigA gene encoding the house-keeping sigma factor. Conclusion: During transition phase, the sigB gene showed an enhanced expression, while simultaneously the sigA mRNA decreased in abundance. This might cause a replacement of SigA by SigB at the RNA polymerase core enzyme and in turn results in increased expression of genes relevant for the transition and the stationary phase, either to cope with nutrient limitation or with the accompanying oxidative stress. The increased expression of genes encoding anti-oxidative or protection functions also prepares the cell for upcoming limitations and environmental stresses.
BIOMED CENTRAL LTD
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://nbn-resolving.org/urn:nbn:de:0070-pub-15961026
https://pub.uni-bielefeld.de/record/1596102
https://pub.uni-bielefeld.de/download/1596102/2311110
eng
info:eu-repo/semantics/altIdentifier/doi/10.1186/1471-2164-8-4
info:eu-repo/semantics/altIdentifier/issn/1471-2164
info:eu-repo/semantics/altIdentifier/wos/000243660500001
info:eu-repo/semantics/altIdentifier/pmid/17204139
info:eu-repo/semantics/openAccess
https://rightsstatements.org/vocab/InC/1.0/
oai:pub.uni-bielefeld.de:1596114
2018-07-24T12:58:43Z
journal_article
doc-type:article
Repression and the unconscious
Langnickel, Robert
Markowitsch, Hans J.
Langnickel R, Markowitsch HJ. Repression and the unconscious. <em>BEHAVIORAL AND BRAIN SCIENCES</em>. 2006;29(05):524-+.
We argue that repression is primarily an unconscious process and that the position of Erdelyi is not coherent with Freud's views on the matter. Repression of ideas is a process that takes place without the knowledge of the subject. In this respect, it is essentially different from suppression, where ideas are acted upon by a conscious will.
CAMBRIDGE UNIV PRESS
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596114
eng
info:eu-repo/semantics/altIdentifier/doi/10.1017/s0140525x06359110
info:eu-repo/semantics/altIdentifier/issn/0140-525X
info:eu-repo/semantics/altIdentifier/issn/1469-1825
info:eu-repo/semantics/altIdentifier/wos/000243710500044
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596131
2018-07-24T12:58:50Z
journal_article
doc-type:article
ddc:570
journal_articleFtxt
open_access
GABI-Kat SimpleSearch: an Arabidopsis thaliana T-DNA mutant database with detailed information for confirmed insertions
Li, Yong
Rosso, Mario G.
Viehöver, Prisca
Weisshaar, Bernd ; https://orcid.org/0000-0002-7635-3473
ddc:570
Li Y, Rosso MG, Viehöver P, Weisshaar B. GABI-Kat SimpleSearch: an Arabidopsis thaliana T-DNA mutant database with detailed information for confirmed insertions. <em>Nucleic Acids Research</em>. 2007;35(Database):D874-D878.
OXFORD UNIV PRESS
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://nbn-resolving.org/urn:nbn:de:0070-pub-15961312
https://pub.uni-bielefeld.de/record/1596131
https://pub.uni-bielefeld.de/download/1596131/2311111
eng
info:eu-repo/semantics/altIdentifier/doi/10.1093/nar/gkl753
info:eu-repo/semantics/altIdentifier/issn/0305-1048
info:eu-repo/semantics/altIdentifier/issn/1362-4962
info:eu-repo/semantics/altIdentifier/wos/000243494600169
info:eu-repo/semantics/altIdentifier/pmid/17062622
info:eu-repo/semantics/openAccess
https://rightsstatements.org/vocab/InC/1.0/
oai:pub.uni-bielefeld.de:1596137
2018-07-24T12:58:13Z
journal_article
doc-type:article
Identification and characterization of a nodH ortholog from the alfalfa-nodulating Or191-like rhizobia
Del Papa, M. F.
Pistorio, M.
Draghi, W. O.
Lozano, M. J.
Giusti, M. A.
Medina, C.
van Dillewijn, P.
Martinez-Abarca, F.
Flores, B. Moron
Ruiz-Sainz, J. E.
Megias, M.
Pühler, Alfred ; https://orcid.org/0000-0003-4723-2960
Niehaus, Karsten
Toro, N.
Lagares, A.
Del Papa MF, Pistorio M, Draghi WO, et al. Identification and characterization of a nodH ortholog from the alfalfa-nodulating Or191-like rhizobia. <em>Molecular Plant - Microbe Interactions</em>. 2007;20(2):138-145.
Nodulation of Medicago sativa (alfalfa) is known to be restricted to Sinorhizobium meliloti and a few other rhizobia that include the poorly characterized isolates related to Rhizobium sp. strain Or191. Distinctive features of the symbiosis between alfalfa and S. meliloti are the marked specificity from the plant to the bacteria and the strict requirement for the presence of sulfated lipochitooligosaccharides (Nod factors [NFs]) at its reducing end. Here, we present evidence of the presence of a functional nodH-encoded NF sulfotransferase in the Or191-like rhizobia. The nodH gene, present in single copy, maps to a high molecular weight megaplasmid. As in S. meliloti, a nodF homolog was identified immediately upstream of nodH that was transcribed in the opposite direction (local synteny). This novel nodH ortholog was cloned and shown to restore both NF sulfation and the Nif(+)Fix(+) phenotypes when introduced into an S. meliloti nodH mutant. Unexpectedly, however, nodH disruption in the Or191-like bacteria did not abolish their ability to nodulate alfalfa, resulting instead in a severely delayed nodulation. In agreement with evidence from other authors, the nodH sequence analysis strongly supports the idea that the Or191-like rhizobia most likely represent a genetic mosaic resulting from the horizontal transfer of symbiotic genes from a sinorhizobial megaplasmid to a not yet clearly identified ancestor.
AMER PHYTOPATHOLOGICAL SOC
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596137
eng
info:eu-repo/semantics/altIdentifier/doi/10.1094/MPMI-20-2-0138
info:eu-repo/semantics/altIdentifier/issn/0894-0282
info:eu-repo/semantics/altIdentifier/wos/000243542400004
info:eu-repo/semantics/altIdentifier/pmid/17313165
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596177
2018-07-24T12:58:57Z
journal_article
doc-type:article
Renormalisation du temps local des points triples du mouvement Brownien
Jenane, R.
Hachaichi, R.
Streit, Ludwig ; https://orcid.org/0000-0002-9472-1487
Jenane R, Hachaichi R, Streit L. Renormalisation du temps local des points triples du mouvement Brownien. <em>INFINITE DIMENSIONAL ANALYSIS QUANTUM PROBABILITY AND RELATED TOPICS</em>. 2006;9(4):547-566.
We show that each term of the multiple Wiener integral expansion for the renormalized triple self-intersection local time of higher dimensional Brownien motion converges in law to an independent Brownian motion.
WORLD SCIENTIFIC PUBL CO PTE LTD
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596177
eng
info:eu-repo/semantics/altIdentifier/doi/10.1142/S0219025706002536
info:eu-repo/semantics/altIdentifier/issn/0219-0257
info:eu-repo/semantics/altIdentifier/wos/000243552600004
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596181
2018-07-24T12:58:50Z
journal_article
doc-type:article
A trinucleating ligand based on 1,8-naphthalenediol: Synthesis, structural and magnetic properties of a linear Cu-II Cu-II Cu-II complex
Glaser, Thorsten
Liratzis, Ioannis
Fröhlich, Roland
Weyhermüller, Thomas
Glaser T, Liratzis I, Fröhlich R, Weyhermüller T. A trinucleating ligand based on 1,8-naphthalenediol: Synthesis, structural and magnetic properties of a linear Cu-II Cu-II Cu-II complex. <em>Chemical Communications</em>. 2007;(4):356-358.
The extension of Robson-type ligands from dinucleating based on 2,6-diformylphenol to trinucleating based on 2,7-diformyl-1,8-naphthalenediol is demonstrated by the synthesis, structural and magnetic characterization of the first trinuclear Cu-II complex using a 1,8-naphthalenediol derived ligand.
ROYAL SOC CHEMISTRY
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596181
eng
info:eu-repo/semantics/altIdentifier/doi/10.1039/b612555g
info:eu-repo/semantics/altIdentifier/issn/1359-7345
info:eu-repo/semantics/altIdentifier/issn/1364-548X
info:eu-repo/semantics/altIdentifier/wos/000243443600006
info:eu-repo/semantics/altIdentifier/pmid/17220969
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596187
2018-07-24T12:58:13Z
journal_article
doc-type:article
Role of the cysteine residues in Arabidopsis thaliana cyclophilin CYP20-3 in peptidyl-prolyl cis-trans isomerase and redox-related functions
Laxa, Miriam
König, Janine
Dietz, Karl-Josef
Kandlbinder, Andrea
chloroplast
peroxiredoxin
immunophilin
peptidyl-prolyl cis-trans isomerase (PPI)
cyclophilin
Arabidopsis thaliana
Laxa M, König J, Dietz K-J, Kandlbinder A. Role of the cysteine residues in Arabidopsis thaliana cyclophilin CYP20-3 in peptidyl-prolyl cis-trans isomerase and redox-related functions. <em>BIOCHEMICAL JOURNAL</em>. 2007;401(1):287-297.
Cyps (cyclophilins) are ubiquitous proteins of the immunophilin superfamily with proposed functions in protein folding, protein degradation, stress response and signal transduction. Conserved cysteine residues further suggest a roll in redox regulation. In order to get insight into the conformational change mechanism and functional properties of the chloroplast-located CYP20-3, site-directed mutagenized cysteine -> serine variants were generated and analysed for enzymatic and conformational properties under reducing and oxidizing conditions. Compared with the wildtype form, elimination of three out of the four cysteine residues decreased the catalytic efficiency of PIPI (peptidyi-prolyl cis-trans isomerase) activity of the reduced CYP20-3, indicating a regulatory role of dithiol-disulfide transitions in protein function. Oxidation was accompanied by conformational changes with a predominant role in the structural rearrangement of the disulfide bridge formed between Cys(54) and Cys(171). The rather negative E-m (midpoint redox potential) of -319 mV places CYP20-3 into the redox hierarchy of the chloroplast, suggesting the activation of CYP20-3 in the light under conditions of limited acceptor availability for photosynthesis as realized under environmental stress. Chloroplast Prx (peroxiredoxins) were identified as interacting partners of CYP20-3 in a DNA-protection assay. A catalytic role in the reduction of 2-Cys PrxA and 2-Cys PrxB was assigned to Cys(129) and Cys(171). In addition, it was shown that the isomerization and disulfide-reduction activities are two independent functions of CYP20-3 that both are regulated by the redox state of its active centre.
PORTLAND PRESS LTD
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596187
eng
info:eu-repo/semantics/altIdentifier/doi/10.1042/BJ20061092
info:eu-repo/semantics/altIdentifier/issn/0264-6021
info:eu-repo/semantics/altIdentifier/issn/1470-8728
info:eu-repo/semantics/altIdentifier/wos/000243538800029
info:eu-repo/semantics/altIdentifier/pmid/16928193
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596201
2018-07-24T12:58:50Z
journal_article
doc-type:article
Behavioural responses to video playbacks by zebra finch males
Galoch, Zdzislaw
Bischof, Hans-Joachim
multimodal communication
video clips
courtship behaviour
Galoch Z, Bischof H-J. Behavioural responses to video playbacks by zebra finch males. <em>Behavioural Processes</em>. 2007;74(1):21-26.
A major problem for communication research is to provide standardized stimuli and to disentangle the relative contribution of different sensory channels to the compound signal and its effectiveness. Video techniques have frequently been used for this purpose. Fifty Hertz cathode ray tube (CRT) screens cannot be used for birds because their flicker frequency is lower than the time resolution of at least songbirds. Thin film transistor (TFF) screens have successfully been used to present video clips of behaving conspecifics. We show here that they are indeed transmitting video images in a way that enables zebra finches to react appropriately to live video images of conspecifics and that the test birds are able to detect small differences in the behaviour of the stimulus animals. Adding acoustic information strongly enhanced the reaction to the video clips. (c) 2006 Published by Elsevier B.V.
ELSEVIER SCIENCE BV
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596201
eng
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.beproc.2006.09.002
info:eu-repo/semantics/altIdentifier/issn/0376-6357
info:eu-repo/semantics/altIdentifier/wos/000243479900003
info:eu-repo/semantics/altIdentifier/pmid/17045422
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596205
2018-07-24T12:57:55Z
journal_article
doc-type:article
DeerAnalysis2006 - a comprehensive software package for analyzing pulsed ELDOR data
Jeschke, G.
Chechik, V.
Ionita, P.
Godt, Adelheid
Zimmermann, H.
Banham, J.
Timmel, C. R.
Hilger, D.
Jung, H.
Jeschke G, Chechik V, Ionita P, et al. DeerAnalysis2006 - a comprehensive software package for analyzing pulsed ELDOR data. <em>APPLIED MAGNETIC RESONANCE</em>. 2006;30(3-4):473-498.
Pulsed electron-electron double resonance techniques such as the four-pulse double electron-electron resonance experiment measure a dipolar evolution function of the sample. For a sample consisting of spin-carrying nanoobjects, this function is the product of a form factor, corresponding to the internal structure of the nanoobject, and a background factor, corresponding to the distribution of nanoobjects in space. The form factor contains information on the spin-to-spin distance distribution within the nanoobject and on the average number of spins per nanoobject, while the background factor depends on constraints, such as a confinement of the nanoobjects to a two-dimensional layer. Separation of the dipolar evolution function into these two contributions and extraction of the spin-to-spin distance distribution require numerically stable mathematical algorithms that can handle data for different classes of samples, e.g., spin-labelled biomacromolecules and synthetic materials. Furthermore, experimental imperfections such as the limited excitation bandwidth of microwave pulses need to be considered. The software package DeerAnalysis2006 provides access to a comprehensive set of tools for such data analysis within a common user interface. This interface allows for several tests of the reliability and precision of the extracted information. User-supplied models for the spin-to-spin distance distribution within a certain class of nanoobjects can be added to an existing library and be fitted with a universal algorithm.
SPRINGER WIEN
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596205
eng
info:eu-repo/semantics/altIdentifier/doi/10.1007/BF03166213
info:eu-repo/semantics/altIdentifier/issn/0937-9347
info:eu-repo/semantics/altIdentifier/issn/1613-7507
info:eu-repo/semantics/altIdentifier/wos/000243548800015
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596215
2018-07-24T12:58:43Z
conference
doc-type:conferenceObject
Designing a sociable humanoid robot for interdisciplinary research
Hackel, Matthias
Schwope, Stefan
Fritsch, Jannik
Wrede, Britta ; https://orcid.org/0000-0003-1424-472X
Sagerer, Gerhard
human-robot interaction
embodied communication
humanoid robot
Hackel M, Schwope S, Fritsch J, Wrede B, Sagerer G. Designing a sociable humanoid robot for interdisciplinary research. In: <em>Advanced Robotics</em>. Advanced Robotics. Vol 20. VSP BV; 2006: 1219-1235.
This paper presents the humanoid robot BARTHOC and the smaller, but system-equal twin, BARTHOC Junior. Both robots have been developed to study human-robot interaction. The main focus of BARTHOC's design was to realize the expression and behavior of the robot to be as human-like as possible. This allows us to apply the platform to manifold research and demonstration areas. With its human-like look and mimic possibilities it differs from other platforms like ASIMO or QRIO and enables experiments even close to Mori's 'uncanny valley'. The paper describes details of the mechanical and electrical design of BARTHOC together with its PC control interface and an overview of the interaction architecture. Its humanoid appearance allows limited imitation of human behavior. The basic interaction software running on BARTHOC has been completely ported from a mobile robot except for some functionalities that could not be used due to hardware differences such as the lack of mobility. Based on these components, the robot's human-like appearance will enable us to study embodied interaction and to explore theories of human intelligence.
VSP BV
2006
http://purl.org/coar/resource_type/c_5794
info:eu-repo/semantics/conferenceObject
doc-type:conferenceObject
text
https://pub.uni-bielefeld.de/record/1596215
eng
info:eu-repo/semantics/altIdentifier/doi/10.1163/156855306778792425
info:eu-repo/semantics/altIdentifier/issn/0169-1864
info:eu-repo/semantics/altIdentifier/wos/000243431100003
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596221
2018-07-24T12:58:13Z
journal_article
doc-type:article
Novel trinuclear Mn-II/Mn-II/Mn-II complexes - Crystal structures and catalytic properties
Kloskowski, Michael
Pursche, Daniel
Hoffmann, Rolf-Dieter
Poettgen, Rainer
Laege, Mechtild
Hammerschmidt, Adrienne
Glaser, Thorsten
Krebs, Bernt
mangenese complexes
PSIIOEC model complex
catalase activity
trinuclear complexes
Kloskowski M, Pursche D, Hoffmann R-D, et al. Novel trinuclear Mn-II/Mn-II/Mn-II complexes - Crystal structures and catalytic properties. <em>ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE</em>. 2007;633(1):106-112.
The trinuclear manganese(II) complexes [Mn-3(L-1)(2)(mu-OAc)(4)]center dot 2Et(2)O {HL1 = (1-hydroxy-4-nitrobenzyl)((2- pyridyl)methyl) ((1-methylimidazol-2-yl)methyl)amine} (1.2EtOH), [Mn-3(L-2)(2)(mu-OAc)(4)] {HL2 = ((1-methylimidazol-2-yl)methyl)(1-hydroxybenzyl)amine (2) and [Mn-3(L-3)(2)(mu-OAc)6] {L-3 = bis(1-methylimidazol-2-yl)methanonel (3) were synthesized. The compounds were characterized by X-ray crystallography, mass spectrometry, IR, UV-vis spectroscopy, and elemental analysis. The manganese atoms in 1 and 2 are bridged by phenol moieties of the ligands and acetates. In 3 they are only bridged by acetates in a mono- and bi-dentate way. The resulting Mn...Mn distances are 3.233(1) angstrom (1), 3.364(1) angstrom (2) and 3.643(7) angstrom (3). In the present compounds different limiting cases for the phenomenon of the carboxylate shift are realized. Besides symmetric mono- and bi-dentate bridging an unusual intermediate is also observed. 1.2EtOH is the first example of a trinuclear model for the OEC that shows catalase activity. Furthermore it was characterized by temperature dependent magnetic susceptibility measurements and a total spin ground state of S-t = 5/2 was found. The results for 1 reveals antiferromagnetic coupling between the central and the terminal manganese ions, with J = 1.2 cm(-1), g = 2.00 (fixed), chi(TIP) = 150 x 10(-6) cm(3) mol(-1).
WILEY-V C H VERLAG GMBH
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596221
eng
info:eu-repo/semantics/altIdentifier/doi/10.1002/zaac.200600262
info:eu-repo/semantics/altIdentifier/issn/0044-2313
info:eu-repo/semantics/altIdentifier/issn/1521-3749
info:eu-repo/semantics/altIdentifier/wos/000243310100014
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596231
2018-07-24T12:57:55Z
journal_article
doc-type:article
On the number of step functions with restrictions
Ahlswede, Rudolf
Blinovsky, V.
random walk
large deviations
Young diagram
Ahlswede R, Blinovsky V. On the number of step functions with restrictions. <em>THEORY OF PROBABILITY AND ITS APPLICATIONS</em>. 2005;50(4):537-560.
We obtain an asymptotic formula for the number of scaled step functions with restrictions on the length and height of steps (shapes of Young diagrams) of a given area in the neighborhood of a given curve. This allows us to find the asymptotics of the whole number of such functions and find the limit shape - the curve of concentration of the step functions.
SIAM PUBLICATIONS
2005
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596231
eng
info:eu-repo/semantics/altIdentifier/doi/10.1137/S0040585X97981974
info:eu-repo/semantics/altIdentifier/issn/0040-585X
info:eu-repo/semantics/altIdentifier/issn/1095-7219
info:eu-repo/semantics/altIdentifier/wos/000243284300001
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596265
2018-07-24T12:58:44Z
journal_article
doc-type:article
A theoretical network model to analyse neurogenesis and synaptogenesis in the dentate gyrus
Butz, Markus
Lehmann, Konrad
Dammasch, Ingolf E.
Teuchert-Noodt, Gertraud
network model
apoptosis
cell proliferation
synaptogenesis
neurogenesis
hippocampus
rewiring
homoestatic plasticity
Butz M, Lehmann K, Dammasch IE, Teuchert-Noodt G. A theoretical network model to analyse neurogenesis and synaptogenesis in the dentate gyrus. <em>NEURAL NETWORKS</em>. 2006;19(10):1490-1505.
We describe a strongly biologically motivated artificial neural network approach to model neurogenesis and synaptic turnover as it naturally occurs for example in the hippocampal dentate gyrus (DG) of the developing and adult mammalian and human brain. The results suggest that cell proliferation (CP) has not only a functional meaning for computational tasks and learning but is also relevant for maintaining homeostatic stability of the neural activity. Moderate rates of CP buffer disturbances in input activity more effectively than networks without or very high CR. Up to a critical mark an increase of CP enhances synaptogenesis which might be beneficial for learning. However, higher rates of CP are rather ineffective as they destabilize the network: high CP rates and a disturbing input activity effect a reduced cell survival. By these results the simulation model sheds light on the recurrent interdependence of structure and function in biological neural networks especially in hippocampal circuits and the interacting morphogenetic effects of neurogenesis and synaptogenesis. (c) 2006 Elsevier Ltd. All rights reserved.
PERGAMON-ELSEVIER SCIENCE LTD
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596265
eng
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.neunet.2006.07.007
info:eu-repo/semantics/altIdentifier/issn/0893-6080
info:eu-repo/semantics/altIdentifier/wos/000243215200004
info:eu-repo/semantics/altIdentifier/pmid/17014989
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596280
2018-07-24T12:58:57Z
journal_article
doc-type:article
Actinic extreme ultraviolet lithography mask blank defect inspection by photoemission electron microscopy
Lin, Jingquan
Neuhaeusler, Ulrich
Slieh, Jawad
Brechling, Armin
Kleineberg, Ulf
Heinzmann, Ulrich
Oelsner, Andreas
Valdaitsev, Dima
Schoenhense, Gerd
Weber, Nils
Escher, Matthias
Merkel, Michael
Lin J, Neuhaeusler U, Slieh J, et al. Actinic extreme ultraviolet lithography mask blank defect inspection by photoemission electron microscopy. <em>JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B</em>. 2006;24(6):2631-2635.
A new method for the actinic inspection of defects inside and on top of extreme ultraviolet (EUV) lithography multi layer-coated mask blanks is presented. The experimental technique is based on photoemission electron microscopy supported by the generation of a standing wave field inside and above the multilayer mask blank when illuminated near the resonance Bragg wavelength at around 13.5 nm. Experimental results on programed defect samples based on electron beam lithographic structures or silica balls overcoated with an EUV multilayer show that buried defects with a lateral size down to 50 nm are detectable. Furthermore, phase structures as shallow as 6 nm in height on a programed phase grating sample have been detected by this technique. The contrast of the phase defect structures has shown to be strongly dependent on and controlled by the phase of the standing wave field at the mask blank surface, and thus can be optimized by tuning the inspection wavelength. (c) 2006 American Vacuum Society.
A V S AMER INST PHYSICS
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596280
eng
info:eu-repo/semantics/altIdentifier/doi/10.1116/1.2366607
info:eu-repo/semantics/altIdentifier/issn/1071-1023
info:eu-repo/semantics/altIdentifier/wos/000243324400025
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596294
2018-07-24T12:58:52Z
journal_article
doc-type:article
Multicolor single-molecule spectroscopy with alternating laser excitation for the investigation of interactions and dynamics
Ross, Joachim
Buschkamp, Peter
Fetting, Daniel
Donnermeyer, Achim
Roth, Christian M.
Tinnefeld, Philip
Ross J, Buschkamp P, Fetting D, Donnermeyer A, Roth CM, Tinnefeld P. Multicolor single-molecule spectroscopy with alternating laser excitation for the investigation of interactions and dynamics. <em>Journal of Physical Chemistry B</em>. 2007;111(2):321-326.
We have developed confocal multicolor single-molecule spectroscopy with optimized detection sensitivity on three spectrally distinct channels for the study of biomolecular interactions and FRET between more than two molecules. Using programmable acousto-optical devices as beamsplitter and excitation filter, we overcome some of the limitations of conventional multichroic beamsplitters and implement rapid alternation between three laser lines. This enables to visualize the synthesis of DNA three-way junctions on a single-molecule basis and to resolve seven stoichiometric subpopulations as well as to quantify FRET in the presence of competing energy transfer pathways. Furthermore, the ability to study correlated molecular movements by monitoring several distances within a biomolecular complex simultaneously is demonstrated.
AMER CHEMICAL SOC
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596294
eng
info:eu-repo/semantics/altIdentifier/doi/10.1021/jp066082g
info:eu-repo/semantics/altIdentifier/issn/1520-6106
info:eu-repo/semantics/altIdentifier/wos/000243388800001
info:eu-repo/semantics/altIdentifier/pmid/17214479
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596307
2018-07-24T12:58:52Z
journal_article
doc-type:article
Fraud: causes and culprits as perceived by science and the media
Franzen, Martina
Rödder, Simone
Weingart, Peter ; https://orcid.org/0000-0002-8275-525X
Franzen M, Rödder S, Weingart P. Fraud: causes and culprits as perceived by science and the media. <em>EMBO reports</em>. 2007;8(1):3-7.
Nature Publishing Group
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596307
eng
info:eu-repo/semantics/altIdentifier/doi/10.1038/sj.embor.7400884
info:eu-repo/semantics/altIdentifier/issn/1469-221X
info:eu-repo/semantics/altIdentifier/issn/1469-3178
info:eu-repo/semantics/altIdentifier/wos/000243255800003
info:eu-repo/semantics/altIdentifier/pmid/17203094
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596312
2018-07-24T12:58:57Z
journal_article
doc-type:article
Postnatal development of dopamine innervation in the amygdala and the entorhinal cortex of the gerbil (Meriones unguiculatus)
Brummelte, Susanne
Teuchert-Noodt, Gertraud
immunohistochemistry
limbic system
aging
development
Brummelte S, Teuchert-Noodt G. Postnatal development of dopamine innervation in the amygdala and the entorhinal cortex of the gerbil (Meriones unguiculatus). <em>BRAIN RESEARCH</em>. 2006;1125(1):9-16.
Dopamine (DA) projections from the mesencephalon are believed to play a critical role during development and are essential for cognitive and behavioral functions. Since the postnatal maturation patterns of these projections differ substantially between various brain regions, cortical, limbic or subcortical areas might exhibit varying vulnerabilities concerning developmental disorders. The dopaminergic afferents of the rodent prefrontal cortex show an extremely prolonged maturation which is very sensitive to epigenetic challenges. However, less is known about the development of the DA innervation of caudal limbic areas. Therefore, immunohistochemically stained DA fibers were quantitatively examined in the basolateral (BLA) and central amygdaloid nucleus (CE) and the ventrolateral entorhinal cortex (EC) of the Mongolian gerbil (Meriones unguiculatus). Animals of different ages, ranging from juvenile [postnatal day (PD) 14, 20, 30)] to adolescent (PD70), adult (6, 18 months) and aged (24 months), were analyzed. Results show a significant increase of fibers between PD14 and PD20 in the BLA and lateral part of the CE, with a trend for a subsequent decline in fiber densities until PD30. The EC and medial part of the CE showed no developmental changes. Interestingly, none of the investigated areas showed significant reductions of DA fibers during aging. (c) 2006 Elsevier B.V. All rights reserved.
ELSEVIER SCIENCE BV
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596312
eng
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.brainres.2006.10.006
info:eu-repo/semantics/altIdentifier/issn/0006-8993
info:eu-repo/semantics/altIdentifier/wos/000243251200002
info:eu-repo/semantics/altIdentifier/pmid/17112487
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596316
2019-05-13T09:25:35Z
journal_article
doc-type:article
Independence of linear forms with random coefficients
Chistyakov, Gennadiy
Götze, Friedrich
Gaussian random variable
entire
characteristic functions
moments of random variables
independent random variables
Chistyakov G, Götze F. Independence of linear forms with random coefficients. <em>PROBABILITY THEORY AND RELATED FIELDS</em>. 2007;137(1-2):1-24.
We extend the classical Darmois-Skitovich theorem to the case where the linear forms L-r1 = U1X1 +center dot center dot center dot+ UnXn and L-r2 = Un+1X1+center dot center dot center dot+U2nXn have random coefficients U-1,...,U-2n. Under minimal restrictions on the random coefficients we completely describe the distributions of the independent random variables X-1,...,X-n and U-1,...,U-2n such that the linear forms L-r1 and L-r2 are independent.
SPRINGER
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596316
eng
info:eu-repo/semantics/altIdentifier/doi/10.1007/s00440-006-0503-6
info:eu-repo/semantics/altIdentifier/issn/0178-8051
info:eu-repo/semantics/altIdentifier/wos/000243074100001
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596320
2019-05-13T09:19:20Z
journal_article
doc-type:article
Concentration inequalities and limit theorems for randomized sums
Bobkov, Sergey G.
Götze, Friedrich
central limit theorem
self-normalized statistics
orthogonal polynomials
pairwise
independent random variables
concentration
typical distributions
Bobkov SG, Götze F. Concentration inequalities and limit theorems for randomized sums. <em>PROBABILITY THEORY AND RELATED FIELDS</em>. 2007;137(1-2):49-81.
Concentration properties and an asymptotic behaviour of distributions of normalized and self-normalized sums are studied in the randomized model where the observation times are selected from prescribed consecutive integer intervals.
SPRINGER
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596320
eng
info:eu-repo/semantics/altIdentifier/doi/10.1007/s00440-006-0500-9
info:eu-repo/semantics/altIdentifier/issn/0178-8051
info:eu-repo/semantics/altIdentifier/wos/000243074100003
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596324
2019-05-28T15:24:10Z
journal_article
doc-type:article
N/V-limit for stochastic dynamics in continuous particle systems
Grothaus, Martin
Kondratiev, Yuri
Röckner, Michael
diffusion processes
interacting particle systems
limit theorems
Grothaus M, Kondratiev Y, Röckner M. N/V-limit for stochastic dynamics in continuous particle systems. <em>PROBABILITY THEORY AND RELATED FIELDS</em>. 2007;137(1-2):121-160.
We provide an N/V-limit for the infinite particle, infinite volume stochastic dynamics associated with Gibbs states in continuous particle systems on R-d, d >= 1. Starting point is an N-particle stochastic dynamic with singular interaction and reflecting boundary condition in a subset Lambda subset of R-d with finite volume (Lebesgue measure) V = vertical bar Lambda vertical bar < infinity. The aim is to approximate the infinite particle, infinite volume stochastic dynamic by the above N-particle dynamic in Lambda as N -> infinity and V -> infinity such that N/V -> rho, where rho is the particle density. First we derive an improved Ruelle bound for the canonical correlation functions under an appropriate relation between N and V. Then tightness is shown by using the Lyons-Zheng decomposition. The equilibrium measures of the accumulation points are identified as infinite volume canonical Gibbs measures by an integration by parts formula and the accumulation points themselves are identified as infinite particle, infinite volume stochastic dynamics via the associated martingale problem. Assuming a property closely related to Markov uniqueness and weaker than essential self-adjointness, via Mosco convergence techniques we can identify the accumulation points as Markov processes and show uniqueness. I.e., all accumulation corresponding to one invariant canonical Gibbs measure coincide. The proofs work for general repulsive interaction potentials phi of Ruelle type and all temperatures, densities, and dimensions d >= 1, respectively. phi may have a nontrivial negative part and infinite range as e.g. the Lennard-Jones potential. Additionally, our result provides as a by-product an approximation of grand canonical Gibbs measures by finite volume canonical Gibbs measures with empty boundary condition.
SPRINGER
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596324
eng
info:eu-repo/semantics/altIdentifier/doi/10.1007/s00440-006-0499-y
info:eu-repo/semantics/altIdentifier/issn/0178-8051
info:eu-repo/semantics/altIdentifier/wos/000243074100005
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596329
2018-07-24T12:58:57Z
journal_article
doc-type:article
Arabidopsis chromatin-associated HMGA and HMGB use different nuclear targeting signals and display highly dynamic localization within the nucleus
Launholt, Dorte
Merkle, Thomas
Houben, Andreas
Schulz, Alexander
Grasser, Klaus D.
Launholt D, Merkle T, Houben A, Schulz A, Grasser KD. Arabidopsis chromatin-associated HMGA and HMGB use different nuclear targeting signals and display highly dynamic localization within the nucleus. <em>The Plant Cell</em>. 2006;18(11):2904-2918.
In plants, the chromatin-associated high mobility group ( HMG) proteins occur in two subfamilies termed HMGA and HMGB. The HMGA proteins are characterized by the presence of four AT-hook DNA binding motifs, and the HMGB proteins contain an HMG box DNA binding domain. As architectural factors, the HMG proteins appear to be involved in the regulation of transcription and other DNA-dependent processes. We have examined the subcellular localization of Arabidopsis thaliana HMGA, HMGB1, and HMGB5, revealing that they localize to the cell nucleus. They display a speckled distribution pattern throughout the chromatin of interphase nuclei, whereas none of the proteins associate with condensed mitotic chromosomes. HMGA is targeted to the nucleus by a monopartite nuclear localization signal, while efficient nuclear accumulation of HMGB1/5 requires large portions of the basic N-terminal part of the proteins. The acidic C-terminal domain interferes with nucleolar targeting of HMGB1. Fluorescence recovery after photobleaching experiments revealed that HMGA and HMGB proteins are extremely dynamic in the nucleus, indicating that they bind chromatin only transiently before moving on to the next site, thereby continuously scanning the genome for targets. By contrast, the majority of histone H2B is basically immobile within the nucleus, while linker histone H1.2 is relatively mobile.
AMER SOC PLANT BIOLOGISTS
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596329
eng
info:eu-repo/semantics/altIdentifier/doi/10.1105/tpc.106.047274
info:eu-repo/semantics/altIdentifier/issn/1040-4651
info:eu-repo/semantics/altIdentifier/issn/1532-298X
info:eu-repo/semantics/altIdentifier/wos/000243093700006
info:eu-repo/semantics/altIdentifier/pmid/17114349
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596355
2018-07-24T12:58:57Z
journal_article
doc-type:article
Nitrogen metabolism and nitrogen control in corynebacteria: Variations of a common theme
Walter, Britta
Haenssler, Eva
Kalinowski, Jörn
Burkovski, Andreas
ammonium
glutamine synthetase
nitrogen control
nitrogen regulation
Corynebacterium
Walter B, Haenssler E, Kalinowski J, Burkovski A. Nitrogen metabolism and nitrogen control in corynebacteria: Variations of a common theme. <em>JOURNAL OF MOLECULAR MICROBIOLOGY AND BIOTECHNOLOGY</em>. 2007;12(1-2):131-138.
The published genome sequences of Corynebacterium diphtheriae, Corynebacterium efficiens, Corynebacterium glutamicum and Corynebacterium jeikeium were screened for genes encoding central components of nitrogen source uptake, nitrogen assimilation and nitrogen control systems. Interestingly, the soil-living species C. efficiens and C. glutamicum exhibit a broader spectrum of genes for nitrogen transport and metabolism than the pathogenic species C. diphtheriae and C. jeikeium. The latter are characterized by gene decay and loss of functions like urea metabolism and nitrogen-dependent transcription control. The global regulator of nitrogen regulation AmtR and its DNA-binding motif are conserved in C. diphtheriae, C. efficiens and C. glutamicum, while in C. jeikeium, an AmtR-encoding gene as well as putative AmtR-binding motifs are missing. Copyright (c) 2007 S. Karger AG, Basel.
KARGER
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596355
eng
info:eu-repo/semantics/altIdentifier/doi/10.1159/000096468
info:eu-repo/semantics/altIdentifier/issn/1464-1801
info:eu-repo/semantics/altIdentifier/issn/1660-2412
info:eu-repo/semantics/altIdentifier/wos/000243113300015
info:eu-repo/semantics/altIdentifier/pmid/17183220
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596361
2018-07-24T12:58:44Z
conference_abstract
doc-type:other
Expanded newborn screening: Long term follow up of 25 patients with organic acidemias and urea cycle disorders
Trefz, F. K.
Töpel, Thoralf
Scheible, D.
Frauendienst-Egger, G.
Hofestädt, Ralf
Trefz FK, Töpel T, Scheible D, Frauendienst-Egger G, Hofestädt R. Expanded newborn screening: Long term follow up of 25 patients with organic acidemias and urea cycle disorders. <em>JOURNAL OF INHERITED METABOLIC DISEASE</em>. 2006;29(Suppl. 1):84.
SPRINGER
2006
http://purl.org/coar/resource_type/c_c94f
info:eu-repo/semantics/other
doc-type:other
text
https://pub.uni-bielefeld.de/record/1596361
eng
info:eu-repo/semantics/altIdentifier/issn/0141-8955
info:eu-repo/semantics/altIdentifier/wos/000240467100308
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596367
2018-07-24T12:58:57Z
conference_abstract
doc-type:other
www.ramedis.de: Database for long term follow up of patients with rare metabolic diseases
Trefz, F. K.
Töpel, Thoralf
Scheible, D.
Frauendienst-Egger, G.
Hofestädt, Ralf
Trefz FK, Töpel T, Scheible D, Frauendienst-Egger G, Hofestädt R. www.ramedis.de: Database for long term follow up of patients with rare metabolic diseases. <em>JOURNAL OF INHERITED METABOLIC DISEASE</em>. 2006;29(Suppl. 1):84.
SPRINGER
2006
http://purl.org/coar/resource_type/c_c94f
info:eu-repo/semantics/other
doc-type:other
text
https://pub.uni-bielefeld.de/record/1596367
eng
info:eu-repo/semantics/altIdentifier/issn/0141-8955
info:eu-repo/semantics/altIdentifier/wos/000240467100309
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596373
2018-07-24T12:58:44Z
journal_article
doc-type:article
Contribution to the Reactivity of N,N'-Diaryl-1,4-diazabutadienes Aryl–N=CH–CH=N–Aryl (Aryl = 2,6-Dimethylphenyl; 2,4,6-Trimethylphenyl) Towards Boron Trichloride
Weber, Lothar
Förster, Jan
Stammler, Hans-Georg
Neumann, Beate
diazaboroles
diazabutadienes
structures
boron
aminoboranes
Weber L, Förster J, Stammler H-G, Neumann B. Contribution to the Reactivity of N,N'-Diaryl-1,4-diazabutadienes Aryl–N=CH–CH=N–Aryl (Aryl = 2,6-Dimethylphenyl; 2,4,6-Trimethylphenyl) Towards Boron Trichloride. <em>European Journal of Inorganic Chemistry</em>. 2006;2006(24):5048-5056.
The reaction of Aryl-N=CH-CH=N-Aryl (3a: Aryl = 2,6-Me2C6H3; 3b: Aryl=2,4,6-Me3C6H2) with 2 equiv. BCl3 in a toluene/hexane mixture at -50 degrees C led to an inseparable mixture of borolium salts [Aryl-N-a=CH-CH=N(Aryl)BCl2(N-a-B)]+BCl4- (4a: Aryl = 2,6-Me2C6H3; 9a: Aryl = 2,4,6-Me3C6H2) and (Aryl-N-a=CH-C(Cl)=N(Aryl)BCl2(N-a-B)+BCl4- (4b: Aryl = 2,6-Me2C6H3; 9b: Aryl = 2,4,6-Me3C6H2) and the bicyclic species [HCa=N(Aryl)BCl2N(Aryl)-C-b=(C-a-C-b)](2) (5: Aryl = 2,6-Me2C6H3; 10: Aryl = 2,4,6-Me3C6H2). Sodium amalgam reduction of borolium. salts 4a,b and 9a,b afforded inseparable mixtures of the diazaboroles 2,6-(Me2C6H3NCH)-C-a=CR-N-b(2,6-Me2C6H3)BCl(N-a-B) (1: R = H; 6: R = Cl) and 2,4,6-(Me3C6H2NCH)-C-a=CR-N-b (2,4,6-Me3C6H2)BCl(N-a-B) (2: R = H; 11: R = Cl). In order to obtain pure 1 and 2, diazabutadienes 3a and 3b were slowly combined with 2 equiv. BCl3 in the same solvents at -78 degrees C. The acyclic adducts Cl3BN(Aryl)= CH-CH=N(Aryl)BCl3 (7a: Aryl=2,6-Me2C6H3; 7b: Aryl = 2,4,6-Me3C6H2) were reduced with sodium amalgam to furnish the aminoboranes Cl2BN(Aryl)CH=CH-N(Aryl)BCl2 (8: Aryl = 2,6-Me2C6H3; 12: Aryl = 2,4,6-Me3C6H2). Stirring solutions of 8 and 12 in the presence of CaH2 cleanly gave the diazaboroles I and 2, respectively. The novel compounds were characterized by elemental analyses and H-1-, B-11-, C-13 NMR and mass spectra. The molecular structures of 1, 4a, 5 and 8 were elucidated by single X-ray diffraction analyses. ((c) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)
Wiley
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596373
eng
info:eu-repo/semantics/altIdentifier/doi/10.1002/ejic.200600728
info:eu-repo/semantics/altIdentifier/issn/1434-1948
info:eu-repo/semantics/altIdentifier/issn/1099-0682
info:eu-repo/semantics/altIdentifier/wos/000243077800010
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596383
2018-07-24T12:58:52Z
journal_article
doc-type:article
Countereation transport modeled by porous spherical molybdenum oxide based nanocapsules
Rehder, Dieter
Haupt, Erhard T. K.
Bögge, Hartmut
Müller, Achim ; https://orcid.org/0000-0003-0117-4021
polyoxometalates
NMR
nanocapsules
molybdenum
ion channels
ion transport
spectroscopy
Rehder D, Haupt ETK, Bögge H, Müller A. Countereation transport modeled by porous spherical molybdenum oxide based nanocapsules. <em>CHEMISTRY-AN ASIAN JOURNAL</em>. 2006;1(1-2):76-81.
Porous nanosized polyoxomolybdate capsule anions of composition [{Mo-VI((Mo5O21)-O-VI)(H2O)(6)}(12) (linker)(30)](n-), where (linker)(30) is {(Mo2O4)-O-V(SO4)}(30) (n = 72) (1a) or ((Mo2O4)-O-V(SO4)}(24)((Mo2O4)-O-v(CH3COO)}(6) (n=64) (2a), model the (competitive) cellular transmembrane transport of Li+, Na+, K+, and Ca2+ ions along ion channels. According to X-ray crystallography and Li-7 and Na-23 NMR spectroscopy, Li+ and Na+, the counterions for 1a and 2a, respectively, occupy internal sites of the capsule. This study of the counterion transport phenomenon shows that, while Li+ ions can be replaced to a large extent by Na+ and K+ ions and completely by Ca2+ ions added to a solution of 1a, external Li+ ions do not replace the incorporated Na+ ions of 2a in an analogous experiment. In this context, related properties of the capsules and especially of their flexible channels, in connection with the complex pathways of cation uptake, are discussed briefly. The relevance of these investigations for lithium-based therapies is also addressed.
WILEY-V C H VERLAG GMBH
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596383
eng
info:eu-repo/semantics/altIdentifier/doi/10.1002/asia.200600035
info:eu-repo/semantics/altIdentifier/issn/1861-4728
info:eu-repo/semantics/altIdentifier/issn/1861-471X
info:eu-repo/semantics/altIdentifier/wos/000243157500008
info:eu-repo/semantics/altIdentifier/pmid/17441040
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596393
2019-07-17T09:33:08Z
journal_article
doc-type:article
Large deviations for stochastic generalized porous media equations
Röckner, Michael
Wang, Feng-Yu
Wu, Liming
stochastic porous medium equation
large deviation principle
Röckner M, Wang F-Y, Wu L. Large deviations for stochastic generalized porous media equations. <em>Stochastic Processes and their Applications</em>. 2006;116(12):1677-1689.
The large deviation principle is established for the distributions of a class of generalized stochastic porous media equations for both small noise and short time. (c) 2006 Elsevier B.V. All rights reserved.
Elsevier
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596393
eng
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.spa.2006.05.007
info:eu-repo/semantics/altIdentifier/issn/0304-4149
info:eu-repo/semantics/altIdentifier/wos/000242922400001
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596398
2018-07-24T12:58:57Z
journal_article
doc-type:article
ddc:330
Rationally mispriced assets in equilibrium
Eckwert, Bernhard
Szczutkowski, Andreas
asymmetric information
rational expectations
mispricing
efficiency
ddc:330
Eckwert B, Szczutkowski A. Rationally mispriced assets in equilibrium. <em>SPANISH ECONOMIC REVIEW</em>. 2006;8(4):285-299.
We present a simple model of trading in a financial market where agents are asymmetrically informed and information is transmitted through the price system. We characterize the equilibrium for this economy and show that 'rational mispricing' of assets occurs if the price system fails to reveal the insider information accurately. It is argued that the communication of wrong information through equilibrium prices is compatible with full rationality on the part of the investors and may explain deviations from the efficient markets hypothesis.
SPRINGER HEIDELBERG
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596398
eng
info:eu-repo/semantics/altIdentifier/doi/10.1007/s10108-006-9000-4
info:eu-repo/semantics/altIdentifier/issn/1435-5469
info:eu-repo/semantics/altIdentifier/issn/1435-5477
info:eu-repo/semantics/altIdentifier/wos/000243058200004
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596402
2018-07-24T12:57:55Z
journal_article
doc-type:article
Deficits in visual functions and neuropsychological inconsistency in Borderline Personality Disorder
Beblo, Thomas
Silva Saavedra, Anamaria
Mensebach, Christoph
Lange, Wolfgang
Markowitsch, Hans J.
Rau, Harald
Woermann, Friedrich G.
Driessen, Martin ; https://orcid.org/0000-0003-3496-816X
tests
neuropsychology
visual functions
Borderline Personality Disorder
Beblo T, Silva Saavedra A, Mensebach C, et al. Deficits in visual functions and neuropsychological inconsistency in Borderline Personality Disorder. <em>PSYCHIATRY RESEARCH</em>. 2006;145(2-3):127-135.
For Borderline Personality Disorder (BPD) cognitive and perceptual impairments were reported in some but not all studies. The aim of the present study was to analyze the neuropsychological performance of BPD patients in different domains. Predominant impairments of visual functions and an increased intra-individual variation of test performances within neuropsychological domains were expected. We investigated 22 patients with BPD and a matched sample of 22 healthy control subjects. A comprehensive clinical and neuropsychological test battery was administered. Effect sizes indicate primarily deficits of visual functions such as visual memory (Wechsler Memory Scale-Revised, WMS-R: Visual pair associates and visual reproduction, Complex Figure Test: Recall) and visuo-spatial abilities (Leistungspruefsystem, LPS 9 and 10: Spatial imagination and embedded figures), but also of executive functions (Tower of Hanoi, Trail Making Test-B, semantic and figural fluency, LPS 4: Reasoning). In addition, the intra-individual ranges of neuropsychological test results in BPD patients were increased compared to those of healthy subjects. This finding might be due to a high degree of temporary stress that interferes with effective cognitive processing. Further research is needed to confirm the present results and to control for stress during the test procedure. (c) 2006 Elsevier Ireland Ltd. All rights reserved.
ELSEVIER IRELAND LTD
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596402
eng
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.psychres.2006.01.017
info:eu-repo/semantics/altIdentifier/issn/0165-1781
info:eu-repo/semantics/altIdentifier/wos/000242915500005
info:eu-repo/semantics/altIdentifier/pmid/17070927
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596412
2018-07-24T12:58:44Z
journal_article
doc-type:article
The mitochondrial type II peroxiredoxin from poplar
Gama, Filipe
Keech, Olivier
Eymery, Francoise
Finkemeier, Iris
Gelhaye, Eric
Gardestrom, Per
Dietz, Karl-Josef
Rey, Pascal
Jacquot, Jean-Pierre
Rouhier, Nicolas
Gama F, Keech O, Eymery F, et al. The mitochondrial type II peroxiredoxin from poplar. <em>PHYSIOLOGIA PLANTARUM</em>. 2007;129(1):196-206.
Mitochondria are a major site of reactive oxygen species production and controlling the peroxide levels in this compartment is essential. Peroxiredoxins (Prx) are heme-free peroxidases, which use reactive cysteines for their catalysis and reducing systems for their regeneration. One of the two Prxs present in poplar mitochondria, Prx IIF, expressed as a recombinant protein, was found to reduce a broad range of peroxides with electrons provided preferentially by glutaredoxin and to a lesser extent by glutathione, all the thioredoxins tested being inefficient. This protein is constitutively expressed because it is found in all tissues analyzed. Its expression is modified during a biotic interaction between poplar and the rust fungus Melampsora laricii populina. On the other hand, Prx IIF expression does not substantially vary under abiotic stress conditions. Nevertheless, water deficit or chilling and probably induced senescence, but not photooxidative conditions or heavy metal treatment, also led to a small increase in PrxIIF abundance in Arabidopsis thaliana plants.
BLACKWELL PUBLISHING
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596412
eng
info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1399-3054.2006.00785.x
info:eu-repo/semantics/altIdentifier/issn/0031-9317
info:eu-repo/semantics/altIdentifier/issn/1399-3054
info:eu-repo/semantics/altIdentifier/wos/000242865700020
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596424
2018-07-24T12:58:44Z
journal_article
doc-type:article
Force dependence of transition rates in atomic friction
Evstigneev, Mykhaylo ; https://orcid.org/0000-0002-7056-2573
Schirmeisen, Andre
Jansen, Lars
Fuchs, Harald
Reimann, Peter
Evstigneev M, Schirmeisen A, Jansen L, Fuchs H, Reimann P. Force dependence of transition rates in atomic friction. <em>PHYSICAL REVIEW LETTERS</em>. 2006;97(24): 240601.
The lateral forces during stick-slip motion of an atomic force microscope cantilever on highly oriented pyrolytic graphite are measured and analyzed. We identify the regimes where thermally activated interstitial hopping of the cantilever tip proceeds according to a single-step reaction scheme and extract the corresponding force-dependent transition rates directly from the experimental data. We find that such a single-step reaction scenario is valid only at relatively high velocities, while at slower pulling speeds, a more complicated hopping mechanism must be at work. We suggest formation of multiple bonds of the tip-sample contact as a possible candidate for this mechanism.
AMERICAN PHYSICAL SOC
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596424
eng
info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevLett.97.240601
info:eu-repo/semantics/altIdentifier/issn/0031-9007
info:eu-repo/semantics/altIdentifier/issn/1079-7114
info:eu-repo/semantics/altIdentifier/wos/000242888700007
info:eu-repo/semantics/altIdentifier/pmid/17280262
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596436
2018-07-24T12:58:44Z
journal_article
doc-type:article
Academic library and information services: New paradigms for the digital age. Proceedings of the 8th International Bielefeld Conference, 7-9 February 2006 Bielefeld, Germany - Guest editorial
Lossau, Norbert
Lossau N. Academic library and information services: New paradigms for the digital age. Proceedings of the 8th International Bielefeld Conference, 7-9 February 2006 Bielefeld, Germany - Guest editorial. <em>Library Hi Tech</em>. 2006;24(4):477-479.
EMERALD GROUP PUBLISHING LIMITED
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596436
eng
info:eu-repo/semantics/altIdentifier/issn/0737-8831
info:eu-repo/semantics/altIdentifier/wos/000242893300001
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596442
2018-07-24T12:58:13Z
journal_article
doc-type:article
ddc:020
ProSeBiCA: development of new library services by means of conjoint analysis
Hermelbracht, Antonia
Koeper, Bettina
Germany
academic libraries
surveys
market research
information services
ddc:020
Hermelbracht A, Koeper B. ProSeBiCA: development of new library services by means of conjoint analysis. <em>Library Hi Tech</em>. 2006;24(4):595-603.
Purpose - The purpose of this article is to provide a description of the project ProSeBiCA, carried out in order to adapt the marketing research tool conjoint analysis for the development of future library services. The paper describes the methodical approach, and provides an overview of the results gained by several user surveys. Designt/methodology/approach - The methodical approach includes the use of adaptive conjoint analysis (ACA) and choice-based conjoint analysis (CBC). Findings - Conjoint analysis is an appropriate tool for the strategic development of library services. It provides detailed results by identifying users' preferences towards concrete services, and allows to deduce general statements about future trends for library services. Research limitations/implications - Future plans include cooperation with the Sheridan Libraries at Johns Hopkins University (Baltimore, Maryland), the Association of Research Libraries (ARL), and other interested partners in order to adapt the ProSeBiCA ftamework for US libraries and to integrate techniques used by the partners (CAPM, LibQUAL + (TM)). The extension of conjoint analysis to the evaluation of services for a fee will be an additional area of research. Practical implications - Service orientation in libraries can be based on a systematic approach. Depending on local circumstances, interested libraries can improve their service orientation in different ways, either by discussing the results of the analysis made in this project or by using the Conjoint Analysis questionnaire for a survey in their institutions. Originality/value - The paper describes the current status and provides the latest results of ProSeBiCA. It is of interest to library managers and marketing researchers.
Emerald
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596442
eng
info:eu-repo/semantics/altIdentifier/doi/10.1108/07378830610715455
info:eu-repo/semantics/altIdentifier/issn/0737-8831
info:eu-repo/semantics/altIdentifier/wos/000242893300012
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596446
2018-07-24T12:58:52Z
journal_article
doc-type:article
Spectral contrasts for landmark navigation
Kollmeier, Thomas
Röben, Frank
Schenck, Wolfram
Möller, Ralf ; https://orcid.org/0000-0001-7389-3696
Kollmeier T, Röben F, Schenck W, Möller R. Spectral contrasts for landmark navigation. <em>Journal of the Optical Society of America A: Optics, Image Science & Vision</em>. 2007;24(1):1-10.
Visual robot navigation in outdoor environments would benefit from an illumination-independent representation of images. We explore how such a representation, comprising a black skyline of objects in front of a white sky, can be obtained from dual-channel spectral contrast measures. Light from sky and natural objects under different conditions of illumination was analyzed by five spectral channels: ultraviolet, blue, green, red, and near infrared. Linear discriminant analysis was applied to determine the optimal linear separation between sky and object points. A statistical comparison shows that contrasts with large differences in the wavelength of the two channels, specifically ultraviolet-infrared, blue-infrared, and ultraviolet-red, yield the best separation. Within a single channel, the best separation was obtained for ultraviolet light. The gain in separation quality when all five channels were included is relatively small. (c) 2006 Optical Society of America.
OPTICAL SOC AMER
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596446
eng
info:eu-repo/semantics/altIdentifier/doi/10.1364/JOSAA.24.000001
info:eu-repo/semantics/altIdentifier/issn/1084-7529
info:eu-repo/semantics/altIdentifier/issn/1520-8532
info:eu-repo/semantics/altIdentifier/wos/000243036300001
info:eu-repo/semantics/altIdentifier/pmid/17164837
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596451
2018-07-24T12:58:57Z
journal_article
doc-type:article
Dissecting and reducing the heterogeneity of excited-state energy transport in DNA-Based photonic wires
Heilemann, Mike
Kasper, Robert
Tinnefeld, Philip
Sauer, Markus
Heilemann M, Kasper R, Tinnefeld P, Sauer M. Dissecting and reducing the heterogeneity of excited-state energy transport in DNA-Based photonic wires. <em>JOURNAL OF THE AMERICAN CHEMICAL SOCIETY</em>. 2006;128(51):16864-16875.
Molecular photonic wires are one-dimensional representatives of a family of nanoscale molecular devices that transport excited-state energy over considerable distances in analogy to optical waveguides in the far-field. In particular, the design and synthesis of such complex supramolecular devices is challenging concerning the desired homogeneity of energy transport. On the other hand, novel optical techniques are available that permit direct investigation of heterogeneity by studying one device at a time. In this article, we describe our efforts to synthesize and study DNA-based molecular photonic wires that carry several chromophores arranged in an energetic downhill cascade and exploit fluorescence resonance energy transfer to convey excited-state energy. The focus of this work is to understand and control the heterogeneity of such complex systems, applying single-molecule fluorescence spectroscopy (SMFS) to dissect the different sources of heterogeneity, i.e., chemical heterogeneity and inhomogeneous broadening induced by the nanoenvironment. We demonstrate that the homogeneity of excited-state energy transport in DNA-based photonic wires is dramatically improved by immobilizing photonic wires in aqueous solution without perturbation by the surface. In addition, our study shows that the in situ construction of wire molecules, i.e., the stepwise hybridization of differently labeled oligonucleotides on glass cover slides, further decreases the observed heterogeneity in overall energy-transfer efficiency. The developed strategy enables efficient energy transfer between up to five chromophores in the majority of molecules investigated along a distance of similar to 14 nm. Finally, we used multiparameter SMFS to analyze the energy flow in photonic wires in more detail and to assign residual heterogeneity under optimized conditions in solution to different leakages and competing energy-transfer processes.
AMER CHEMICAL SOC
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596451
eng
info:eu-repo/semantics/altIdentifier/doi/10.1021/ja065585x
info:eu-repo/semantics/altIdentifier/issn/0002-7863
info:eu-repo/semantics/altIdentifier/issn/1520-5126
info:eu-repo/semantics/altIdentifier/wos/000242941600092
info:eu-repo/semantics/altIdentifier/pmid/17177437
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596457
2018-07-24T12:57:55Z
journal_article
doc-type:article
DNA-based molecular wires: Multiple emission pathways of individual constructs
Sanchez-Mosteiro, Gabriel
van Dijk, Erik M. H. P.
Hernando, Jordi
Heilemann, Mike
Tinnefeld, Philip
Sauer, Markus
Koberlin, Felix
Patting, Matthias
Wahl, Michael
Erdmann, Rainer
van Hulst, Niek F.
Garcia-Parajo, Maria F.
Sanchez-Mosteiro G, van Dijk EMHP, Hernando J, et al. DNA-based molecular wires: Multiple emission pathways of individual constructs. <em>JOURNAL OF PHYSICAL CHEMISTRY B</em>. 2006;110(51):26349-26353.
The extent of photon energy transfer through individual DNA-based molecular wires composed of five dyes is investigated at the single molecular level. Combining single-molecule spectroscopy and pulse interleaved excitation imaging, we have directly resolved the time evolution spectral response of individual constructs, while simultaneously probing DNA integrity. Our data clearly show that intact wires exhibit photon-transfer efficiencies close to 100% across five dyes. Dynamical and multiple pathways for the photon emission resulting from conformational freedom of the wire are readily uncovered. These results provide the basis for guiding the synthesis of DNA-based supramolecular arrays with improved photon transport at the nanometer scale.
AMER CHEMICAL SOC
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596457
eng
info:eu-repo/semantics/altIdentifier/doi/10.1021/jp064701f
info:eu-repo/semantics/altIdentifier/issn/1520-6106
info:eu-repo/semantics/altIdentifier/issn/1520-5207
info:eu-repo/semantics/altIdentifier/wos/000242974300112
info:eu-repo/semantics/altIdentifier/pmid/17181294
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596471
2018-07-24T12:57:55Z
journal_article
doc-type:article
Probing DNA-peptide interaction forces at the single-molecule level
Sewald, Norbert ; https://orcid.org/0000-0002-0309-2655
Wilking, Sven D.
Eckel, Rainer
Albu, Silvia
Wollschläger, Katrin
Gaus, Katharina
Becker, Anke
Bartels, Frank W.
Ros, Robert
Anselmetti, Dario ; https://orcid.org/0000-0002-8720-4369
DNA
peptide
transcription factor
molecular recognition
single-molecule force spectroscopy
optical
tweezers
atomic force microscopy
Sewald N, Wilking SD, Eckel R, et al. Probing DNA-peptide interaction forces at the single-molecule level. <em>Journal of Peptide Science</em>. 2006;12(12):836-842.
The versatility of chemical peptide synthesis combined with the high sensitivity of AFM single-molecule force spectroscopy allows us to investigate, quantify, and control molecular recognition processes (molecular nanotechnology), offering a tremendous potential in chemical biology. Single-molecule force spectroscopy experiments are able to detect fast intermediate transition states, details of the energy landscape, and structural changes, while avoiding multiple binding events that can occur under ensemble conditions. Dynamic force spectroscopy (DFS) is even able to provide data on the complex lifetime. This minireview outlines the biophysical methodology, discusses different experimental set-ups, and presents representative results in the form of two case studies, both dealing with DNA-binding peptides. They may serve as model systems, e.g., for transcription factors or gene transfection agents. Copyright (c) 2006 European Peptide Society and John Wiley & Sons, Ltd.
JOHN WILEY & SONS LTD
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596471
eng
info:eu-repo/semantics/altIdentifier/doi/10.1002/psc.820
info:eu-repo/semantics/altIdentifier/issn/1075-2617
info:eu-repo/semantics/altIdentifier/issn/1099-1387
info:eu-repo/semantics/altIdentifier/wos/000243035300014
info:eu-repo/semantics/altIdentifier/pmid/17131299
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596483
2018-07-24T12:57:55Z
journal_article
doc-type:article
Magnetic and chemical properties of Co2MnSi thin films compared to the Co2MnSi/Al-O interface
Schmalhorst, Jan-Michael ; https://orcid.org/0000-0003-1622-9726
Sacher, Marc
Hoeink, V.
Reiss, Günter ; https://orcid.org/0000-0002-0918-5940
Hütten, Andreas
Engel, D.
Ehresmann, A.
Schmalhorst J-M, Sacher M, Hoeink V, et al. Magnetic and chemical properties of Co2MnSi thin films compared to the Co2MnSi/Al-O interface. <em>JOURNAL OF APPLIED PHYSICS</em>. 2006;100(11): 113903.
The Heusler alloy Co2MnSi with theoretically predicted 100% spin polarization has been successfully implemented in Co2MnSi/AlOx/Co7Fe3 magnetic tunnel junctions recently. Here we investigated 100 nm thick Co2MnSi films grown on a vanadium buffer and capped by a thin alumina film. This stack is similar to the lower electrode including the tunneling barrier of magnetic tunnel junctions. By soft x-ray absorption spectroscopy and magnetic circular dichroism in fluorescence and total electron yield detection we determined differences between the chemical and magnetic properties of the Co2MnSi thin films and the Co2MnSi/AlOx interface. Whereas MnO was formed directly at the interface during plasma oxidation of the Al layer, the interfacial Co was not oxidized and its x-ray absorption line shape at the L-2,L-3 edge was similar to the line shape of bulk Co2MnSi. The atomically ordered bulk Co2MnSi showed characteristic differences in the x-ray absorption spectra in comparison with the disordered samples: in the ordered state of the bulk both, Co and Mn, showed additional shoulders about 4 eV above the L-2,L-3 resonances, a large circular dichroism, and a pronounced x-ray absorption near edge fine structure. The same was found for interfacial Co, whereas for interfacial Mn these features were masked by the characteristic absorption multiplet structure of MnO right at the interface which also resulted in a strong reduction of the interfacial Mn moment in annealed samples. (c) 2006 American Institute of Physics.
AMER INST PHYSICS
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596483
eng
info:eu-repo/semantics/altIdentifier/doi/10.1063/1.2384806
info:eu-repo/semantics/altIdentifier/issn/0021-8979
info:eu-repo/semantics/altIdentifier/wos/000242887400102
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596502
2018-07-24T12:58:57Z
journal_article
doc-type:article
Planning and Evaluation of New Academic Library Services by Means of Web-based Conjoint Analysis
Decker, Reinhold ; https://orcid.org/0000-0003-2972-6182
Hermelbracht, Antonia
Decker R, Hermelbracht A. Planning and Evaluation of New Academic Library Services by Means of Web-based Conjoint Analysis. <em>Journal of Academic Librarianship</em>. 2006;32(6):558-572.
New product development is an omnipresent challenge to modern libraries in the information age. Therefore, we present the design and selected results of a comprehensive research project aiming at the systematic and user-oriented planning of academic library services by means of conjoint analysis. The applicability of the analytical framework used and the expressiveness of the attainable results are demonstrated by means of two surveys complementing each other. Both surveys together are representing the opinions of more than 3500 academic library users.
ELSEVIER SCIENCE INC
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596502
eng
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.acalib.2006.06.016
info:eu-repo/semantics/altIdentifier/issn/0099-1333
info:eu-repo/semantics/altIdentifier/wos/000243052900002
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596505
2018-07-24T12:58:13Z
journal_article
doc-type:article
Static magnetization of V-15 cluster at ultra-low temperatures: Precise estimation of antisymmetric exchange
Tarantul, Alex
Tsukerblat, Boris
Müller, Achim ; https://orcid.org/0000-0003-0117-4021
Tarantul A, Tsukerblat B, Müller A. Static magnetization of V-15 cluster at ultra-low temperatures: Precise estimation of antisymmetric exchange. <em>INORGANIC CHEMISTRY</em>. 2007;46(1):161-169.
In this article, the low-temperature static (adiabatic) magnetization data of the nanoscopic V-15 cluster present in K-6[(V15As6O42)-As-IV(H2O)]center dot 8H(2)O is analyzed. The cluster anion, which attracted much attention in the past, contains a triangular V-3(IV) array causing frustration as a function of applied field and temperature. In the analysis, a three-spin (S = 1/2) model of V-15 was employed that includes isotropic antiferromagnetic exchange interaction and antisymmetric (AS) exchange in the most general form compatible with the trigonal symmetry of the system. It was shown that, along with the absolute value of AS exchange, the orientation of the AS vector plays a significant physical role in spin-frustrated systems. In this context, the role of the different components of the AS in the low-temperature magnetic behavior of V-15 was analyzed, and we were able to reach a perfect fit to the experimental data on the staircaselike dependence of magnetization versus field in the whole temperature range including extremely low temperature. Furthermore, it was possible for the first time to precisely estimate the two components of the AS vector coupling constant in a triangular unit, namely, the effective in-plane component, D, and the perpendicular part, D-n.
AMER CHEMICAL SOC
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596505
eng
info:eu-repo/semantics/altIdentifier/doi/10.1021/ic061394j
info:eu-repo/semantics/altIdentifier/issn/0020-1669
info:eu-repo/semantics/altIdentifier/issn/1520-510X
info:eu-repo/semantics/altIdentifier/wos/000243157100021
info:eu-repo/semantics/altIdentifier/pmid/17198424
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596510
2019-05-29T09:13:26Z
conference
doc-type:conferenceObject
Current determinants of 30-day and 3-month mortality in over 2000 aortic valve replacements: impact of routine laboratory parameters
Florath, Ines
Albert, Alexander
Hassanein, Wael
Arnrich, Bert
Rosendahl, Ulrich
Ennker, Ina C.
Ennker, Jürgen
risk factors
aortic valve replacement
mortality
Florath I, Albert A, Hassanein W, et al. Current determinants of 30-day and 3-month mortality in over 2000 aortic valve replacements: impact of routine laboratory parameters. In: <em>European Journal of Cardio-Thoracic Surgery</em>. EUROPEAN JOURNAL OF CARDIO-THORACIC SURGERY. Vol 30. ELSEVIER SCIENCE BV; 2006: 716-721.
Objective: Haematological and biochemical measurements are performed routinely before surgery to exclude organ malfunction and blood cell and coagulation abnormalities. We aimed to test routinely obtained laboratory data as factors predicting operative risk. Methods: Between 1996 and 2003, 2198 patients underwent aortic valve replacement (AVR) (908 of them with concomitant CABG) in our institute. The mean age of the study population was 69 +/- 11 years (range 13-91, 43% female). Clinical and laboratory parameters based on the consolidated data mart set were evaluated by multiple logistic regression analysis. Results: The overall operative mortality (within 30 days) was 3.8% and the mortality after 3 months was 5.9%. In addition to clinical characteristics, the following laboratory values were identified as independent predictors of 30-day mortality: fasting blood glucose, antithrombine III, partial thromboplastine time and creatinine kinase. As independent predictors of 3-month mortality, the following laboratory values were indentified: fasting blood glucose, serum creatinine, antithrombine III, partial thromboplastine time, lactate dehydrogenase, sodium concentration and serum proteins. The discriminative power of the models increased if laboratory parameters were included in addition to preoperative clinical characteristics (from 0.75 to 0.79 and from 0.75 to 0.78 for 30-day and 3-month mortality, respectively). The discriminative power using the logistic EuroScore was tower (0.71 and 0.7, for 30-day and 3-month mortality, respectively). Conclusions: Laboratory parameters as objective markers for organ function and nutritional status are useful data for the prediction of 30-day and 3-month mortality after aortic valve replacement. Using modern methods of information technology, these valuable data which are stored electronically in most hospitals, can be used efficiently for research and quality control. (c) 2006 Elsevier B.V. All rights reserved.
ELSEVIER SCIENCE BV
2006
http://purl.org/coar/resource_type/c_5794
info:eu-repo/semantics/conferenceObject
doc-type:conferenceObject
text
https://pub.uni-bielefeld.de/record/1596510
eng
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.ejcts.2006.08.009
info:eu-repo/semantics/altIdentifier/issn/1010-7940
info:eu-repo/semantics/altIdentifier/wos/000242946100006
info:eu-repo/semantics/altIdentifier/pmid/16965919
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596519
2020-11-12T12:02:33Z
journal_article
doc-type:article
The minimal height of quadratic forms of given dimension
Hurrelbrink, Jürgen
Karpenko, Nikita A.
Rehmann, Ulf
Hurrelbrink J, Karpenko NA, Rehmann U. The minimal height of quadratic forms of given dimension. <em>Archiv der Mathematik volume</em>. 2006;87(6):522-529.
Given an arbitrary n, we consider anisotropic quadratic forms of dimension n overall fields of characteristic not equal 2 and prove that the height of an n-dimensional excellent form (depending on n only) is the (precise) lower bound of the heights of all forms of dimension n.
Springer
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596519
eng
info:eu-repo/semantics/altIdentifier/doi/10.1007/s00013-006-1833-4
info:eu-repo/semantics/altIdentifier/issn/0003-889X
info:eu-repo/semantics/altIdentifier/wos/000242997700006
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596539
2020-02-10T16:09:39Z
journal_article
doc-type:article
"Social Robotics" und Mensch-Maschine-Interaktion: Aktuelle Forschung und Relevanz für die Sozialpsychologie
Social robotics and human-machine interaction: Current research and relevance for social psychology
Echterhoff, Gerald
Bohner, Gerd ; https://orcid.org/0000-0002-0564-3625
Siebler, Frank
social
human-machine interaction
robot
robotics
human-computer interaction
Echterhoff G, Bohner G, Siebler F. "Social Robotics" und Mensch-Maschine-Interaktion: Aktuelle Forschung und Relevanz für die Sozialpsychologie. <em>Zeitschrift für Sozialpsychologie</em>. 2006;37(4):219-231.
VERLAG HANS HUBER
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596539
deu
info:eu-repo/semantics/altIdentifier/doi/10.1024/0044-3514.37.4.219
info:eu-repo/semantics/altIdentifier/issn/0044-3514
info:eu-repo/semantics/altIdentifier/wos/000242819800001
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596548
2018-07-24T12:58:13Z
journal_article
doc-type:article
ddc:570
journal_articleFtxt
open_access
Sperm competition games: optimal sperm allocation in response to the size of competing ejaculates
Engqvist, Leif ; https://orcid.org/0000-0002-9434-7130
Reinhold, Klaus
genetic algorithm
ejaculate size
sperm competition
sexual selection
sneaker
strategic sperm allocation
intensity
ddc:570
Engqvist L, Reinhold K. Sperm competition games: optimal sperm allocation in response to the size of competing ejaculates. <em>Proceedings of the Royal Society B</em>. 2007;274(1607):209-217.
Sperm competition theory predicts that when males are certain of sperm competition, they should decrease sperm investment in matings with an increasing number of competing ejaculates. How males should allocate sperm when competing with differently sized ejaculates, however, has not yet been examined. Here, we report the outcomes of two models assuming variation in males' sperm reserves and males being faced with different amounts of competing sperm. In the first 'spawning model', two males compete instantaneously and both are able to assess the sperm competitive ability of each other. In the second 'sperm storage model', males are sequentially confronted with situations involving different levels of sperm competition, for instance different amounts of sperm already stored by the female mating partner. In both of the models, we found that optimal sperm allocation will strongly depend on the size of the male's sperm reserve. Males should always invest maximally in competition with other males that are equally strong competitors. That is, for males with small sperm reserves, our model predicts a negative correlation between sperm allocation and sperm competition intensity, whereas for males with large sperm reserves, this correlation is predicted to be positive.
ROYAL SOCIETY
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://nbn-resolving.org/urn:nbn:de:0070-pub-15965489
https://pub.uni-bielefeld.de/record/1596548
https://pub.uni-bielefeld.de/download/1596548/2496919
eng
info:eu-repo/semantics/altIdentifier/doi/10.1098/rspb.2006.3722
info:eu-repo/semantics/altIdentifier/issn/0962-8452
info:eu-repo/semantics/altIdentifier/issn/1471-2954
info:eu-repo/semantics/altIdentifier/wos/000242765400006
info:eu-repo/semantics/altIdentifier/pmid/17148249
info:eu-repo/semantics/openAccess
https://rightsstatements.org/vocab/InC/1.0/
oai:pub.uni-bielefeld.de:1596597
2018-07-24T12:58:52Z
journal_article
doc-type:article
Insect walking is based on a decentralized architecture revealing a simple and robust controller
Cruse, Holk
Dürr, Volker ; https://orcid.org/0000-0001-9239-4964
Schmitz, Josef ; https://orcid.org/0000-0003-2054-9124
walking
Environment Neural network ENVIRONMENTS Information coordination Mechanics Muscle muscles leg legs Walking control climbing SYSTEMS system Arthropod model velocity direction LEVEL proprioceptive sensory walknet Artificial Neural Network REFLEXES Reflex Assistance reflex positive feedback Controller Gait movement ACT Simulation POSITION body JOINT Review Stick Insect insect running
pattern generation
insect
leg coordination
leg movement
gait
Cruse H, Dürr V, Schmitz J. Insect walking is based on a decentralized architecture revealing a simple and robust controller. <em>Philos Transact A Math Phys Eng Sci</em>. 2007;365(1850):221-250.
Control of walking in rugged terrain requires one to incorporate different issues, such as the mechanical properties of legs and muscles, the neuronal control structures for the single leg, the mechanics and neuronal control structures for the coordination between legs, as well as central decisions that are based on external information and on internal states. Walking in predictable environments and fast running, to a large degree, rely on muscle mechanics. Conversely, slow walking in unpredictable terrain, e.g. climbing in rugged structures, has to rely on neuronal systems that monitor and intelligently react to specific properties of the environment. An arthropod model system that shows the latter abilities is the stick insect, based on which this review will be focused. An insect, when moving its six legs, has to control 18 joints, three per leg, and therefore has to control 18 degrees of freedom (d.f.). As the body position in space is determined by 6 d.f. only, there are 12 d.f. open to be selected. Therefore, a fundamental problem is as to how these extra d.f. are controlled. Based mainly on behavioural experiments and simulation studies, but also including neurophysiological results, the following control structures have been revealed. Legs act as basically independent systems. The quasi-rhythmic movement of the individual leg can be described to result from a structure that exploits mechanical coupling of the legs via the ground and the body. Furthermore, neuronally mediated influences act locally between neighbouring legs, leading to the emergence of insect-type gaits. The underlying controller can be described as a free gait controller. Cooperation of the legs being in stance mode is assumed to be based on mechanical coupling plus local positive feedback controllers. These controllers, acting on individual leg joints, transform a passive displacement of a joint into an active movement, generating synergistic assistance reflexes in all mechanically coupled joints. This architecture is summarized in the form of the artificial neural network, Walknet , that is heavily dependent on sensory feedback at the proprioceptive level. Exteroceptive feedback is exploited for global decisions, such as the walking direction and velocity.
ROYAL SOCIETY
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596597
eng
info:eu-repo/semantics/altIdentifier/doi/10.1098/rsta.2006.1913
info:eu-repo/semantics/altIdentifier/issn/1364-503X
info:eu-repo/semantics/altIdentifier/issn/1471-2962
info:eu-repo/semantics/altIdentifier/wos/000242771700013
info:eu-repo/semantics/altIdentifier/pmid/17148058
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596606
2018-07-24T12:58:13Z
journal_article
doc-type:article
Academic achievement and personality in university students who are visually impaired
Klinkosz, Waldemar
Sekowski, Andrzej
Brambring, Michael
Klinkosz W, Sekowski A, Brambring M. Academic achievement and personality in university students who are visually impaired. <em>JOURNAL OF VISUAL IMPAIRMENT & BLINDNESS</em>. 2006;100(11):666-675.
This study compared academic achievement by sighted versus visually impaired students at Polish universities and analyzed potential between-group differences on various personality traits and their impact on academic grades. Although there was no main effect of visual status on academic achievement, there were some significant differences between the personality traits of the visually impaired and sighted groups.
AMER FOUNDATION BLIND
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596606
eng
info:eu-repo/semantics/altIdentifier/issn/0145-482X
info:eu-repo/semantics/altIdentifier/wos/000242788700005
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596618
2018-07-24T12:58:13Z
journal_article
doc-type:article
Expressions of OsHKT1, OsHKT2, and OsVHA are differentially regulated under NaCl stress in salt-sensitive and salt-tolerant rice (Oryza sativa L.) cultivars
Kader, Mohammed Abdul
Seidel, Thorsten
Golldack, Dortje
Lindberg, Sylvia
NaCl stress
OsHKT1
cytosolic Na+/K+ homeostasis
FRET efficiency
vacuole volumes
OsHKT2
OsVHA
Kader MA, Seidel T, Golldack D, Lindberg S. Expressions of OsHKT1, OsHKT2, and OsVHA are differentially regulated under NaCl stress in salt-sensitive and salt-tolerant rice (Oryza sativa L.) cultivars. <em>Journal of Experimental Botany</em>. 2006;57(15):4257-4268.
Under NaCl-dominated salt stress, the key to plant survival is maintaining a low cytosolic Na+ level or Na+/K+ ratio. The OsHKT1, OsHKT2, and OsVHA transporter genes might play important roles in maintaining cytosolic Na+ homeostasis in rice (Oryza sativa L. indica cvs Pokkali and BRRI Dhan29). Upon NaCl stress, the OsHKT1 transcript was significantly down-regulated in salt-tolerant cv. Pokkali, but not in salt-sensitive cv. BRRI Dhan29. NaCl stress induced the expression of OsHKT2 and OsVHA in both Pokkali and BRRI Dhan29. In cv. Pokkali, OsHKT2 and OsVHA transcripts were induced immediately after NaCl stress. However, in cv. BRRI Dhan29, the induction of OsHKT2 was quite low and of OsVHA was low and delayed, compared with that in cv. Pokkali. OsHKT2 and OsVHA induction mostly occurred in the phloem, in the transition from phloem to mesophyll cells, and in the mesophyll cells of the leaves. The vacuolar area in cv. Pokkali did not change under either short- (5-10 min) or long-term (24 h) salt stress, although it significantly increased 24 h after the stress in cv. BRRI Dhan29. When expressional constructs of VHA-c and VHA-a with YFP and CFP were introduced into isolated protoplasts of cvs Pokkali and BRRI Dhan29, the fluorescence resonance energy transfer (FRET) efficiency between VHA-c and VHA-a upon salt stress decreased slightly in cv. Pokkali, but increased significantly in cv. BRRI Dhan29. The results suggest that the salt-tolerant cv. Pokkali regulates the expression of OsHKT1, OsHKT2, and OsVHA differently from how the salt-sensitive cv. BRRI Dhan29 does. Together, these proteins might confer salt tolerance in Pokkali by maintaining a low cytosolic Na+ level and a correct ratio of cytosolic Na+/K+.
OXFORD UNIV PRESS
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596618
eng
info:eu-repo/semantics/altIdentifier/doi/10.1093/jxb/erl199
info:eu-repo/semantics/altIdentifier/issn/0022-0957
info:eu-repo/semantics/altIdentifier/issn/1460-2431
info:eu-repo/semantics/altIdentifier/wos/000242716100027
info:eu-repo/semantics/altIdentifier/pmid/17088362
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596624
2018-07-24T12:58:52Z
journal_article
doc-type:article
Identifying mechanisms of competition in multi-species communities
Weigelt, Alexandra
Schumacher, Jens
Walther, Tim
Bartelheimer, Maik
Steinlein, Thomas
Beyschlag, Wolfram
yield-density model
relative
yield
multi-species mixtures
Hieracium pilosella
hyperbolic model
competitive hierarchies
coexistence
biodiversity
relative yield total
additivity
Weigelt A, Schumacher J, Walther T, Bartelheimer M, Steinlein T, Beyschlag W. Identifying mechanisms of competition in multi-species communities. <em>JOURNAL OF ECOLOGY</em>. 2007;95(1):53-64.
1 We tested the hypothesis that the competitive effect of multi-species mixtures on a single target plant can be described as a simple additive function of the effects of single species. 2 In a controlled field competition experiment on sand, we used four common species of dry acidic grasslands (Hieracium pilosella, Jasione montana, Corynephorus canescens and Festuca ovina) to study the effects of both, single- and multi-species neighbourhoods on the target species H. pilosella. 3 Target plant biomass points at a competitive ranking of neighbour species with F. ovina as the strongest competitor followed by C. canescens and H. pilosella, while J. montana has a lower effect on the target. The analysis of the competitive response gives no indication of competitive release or amplification with increasing number of neighbouring species. 4 Further analysis with yield-density models reveals that the competition intensity of most multi-species mixtures is well predicted by the effect of pairwise interactions. Hence, for the majority of species combinations, our results indicate additive effects of species competition. 5 Specific species combinations, however, significantly deviate from this result. For combinations of C. canescens with either one of the herbs, the models show a significantly better fit if a non-additivity parameter is included. The important missing factor to describe target plant growth is species-specific biomass of neighbouring plants and here root biomass is the most crucial determinant. The addition of each of these factors as non-additive parameters significantly increases the predictive power of the model. 6 Our work adds to the increasing evidence that interactions in diverse plant communities are not simply a sum of their component species interactions. For a better understanding of the effect of competition on the structure and development of diverse plant communities, future studies need to consider both additive and non-additive effects of competing species.
BLACKWELL PUBLISHING
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596624
eng
info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-2745.2006.01198.x
info:eu-repo/semantics/altIdentifier/issn/0022-0477
info:eu-repo/semantics/altIdentifier/issn/1365-2745
info:eu-repo/semantics/altIdentifier/wos/000242791300006
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596638
2018-07-24T12:58:44Z
journal_article
doc-type:article
Calixarenes as hosts for ammonium cations: A quantum chemical study and mass-spectrometric investigations
Rozhenko, Alexander B.
Schoeller, Wolfgang
Letzel, Matthias
Decker, Björn
Agena, Ceno
Mattay, Jochen
density functional calculations
mass spectrometry
host-guest systems
cavitands
ammonium cations
Rozhenko AB, Schoeller W, Letzel M, Decker B, Agena C, Mattay J. Calixarenes as hosts for ammonium cations: A quantum chemical study and mass-spectrometric investigations. <em>Chemistry. A European Journal</em>. 2006;12(35):8995-9000.
Host-guest complexes of tetramethylcavitand with different ammonium cations were investigated by using a quantum chemical method at the density func tional level (BP86, B3LYP). The NH4+ cation is strongly bound to the host. Increasing creasing methyl substitution at the cation decreases its inclination towards the complex formation. The calculated data are in line with results from electrospray ionization mass spectrometry (ESI-MS) experiments. They reveal stable aggregates only for the NH4+ cation and for the primary alkylammonium cations.
WILEY-V C H VERLAG
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596638
eng
info:eu-repo/semantics/altIdentifier/doi/10.1002/chem.200501520
info:eu-repo/semantics/altIdentifier/issn/0947-6539
info:eu-repo/semantics/altIdentifier/issn/1521-3765
info:eu-repo/semantics/altIdentifier/wos/000242793500010
info:eu-repo/semantics/altIdentifier/pmid/16969778
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596646
2018-07-24T12:58:57Z
journal_article
doc-type:article
Three-dimensional hydrocarbon cores based on multiply fused cyclopentane and indane units: Centropolyindanes
Kuck, Dietmar
Kuck D. Three-dimensional hydrocarbon cores based on multiply fused cyclopentane and indane units: Centropolyindanes. <em>CHEMICAL REVIEWS</em>. 2006;106(12):4885-4925.
AMER CHEMICAL SOC
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596646
eng
info:eu-repo/semantics/altIdentifier/doi/10.1021/cr050546+
info:eu-repo/semantics/altIdentifier/issn/0
info:eu-repo/semantics/altIdentifier/wos/000242826700007
info:eu-repo/semantics/altIdentifier/pmid/17165679
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596654
2018-07-24T12:57:55Z
journal_article
doc-type:article
The effects of short term enrichment on learning in chickens from a laying strain (Gallus gallus domesticus)
Krause, E. Tobias ; https://orcid.org/0000-0002-8327-3711
Naguib, Marc
Trillmich, Fritz ; https://orcid.org/0000-0003-4816-1156
Schrader, Lars
fearfulness
environmental
short term enrichment
enrichment
behaviour
learning
chickens
Y-maze test
Krause ET, Naguib M, Trillmich F, Schrader L. The effects of short term enrichment on learning in chickens from a laying strain (Gallus gallus domesticus). <em>APPLIED ANIMAL BEHAVIOUR SCIENCE</em>. 2006;101(3-4):318-327.
Rearing and housing systems can have substantial effects on behaviour and physiology in domestic animals. In laying hens, several housing systems with different degrees of enrichment are in commercial use. Here, we tested effects of short term enrichment of housing conditions on the exploration and learning performance in 6 weeks old chickens of a laying hen strain. Subjects were either kept in a litter floor system indoors or in an identical compartment but with additional access to an outdoor free range 1 week prior to the experiments. Subjects from both treatment groups then were tested for exploration and learning performance in a Y-maze. The short term enrichment resulted in a significant difference in learning behaviour and exploratory behaviour. Subjects from enriched conditions with free range access left the start-box faster (p = 0.030), were better in learning the Y-maze task (p = 0.033), and made fewer initial mistakes (p = 0.012) in the Y-maze than subjects from litter floor without free range access. Thus, subjects from the enriched group explored the Y-maze faster, and had a better and faster learning performance. However, in a memory test conducted after the training phases we did not find any differences between groups. The results show that short term enrichment of housing conditions in chickens can have positive immediate effects on behaviour by reducing behaviours that are likely to reflect fearfulness and by positively affecting learning performance. (c) 2006 Elsevier B.V. All rights reserved.
ELSEVIER SCIENCE BV
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596654
eng
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.applanim.2006.02.005
info:eu-repo/semantics/altIdentifier/issn/0168-1591
info:eu-repo/semantics/altIdentifier/wos/000242782100008
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596660
2018-07-24T12:58:57Z
journal_article
doc-type:article
Phase transitions in the early and present universe
Boyanovsky, D.
de Vega, H. J.
Schwarz, Dominik ; https://orcid.org/0000-0003-2413-0881
particle and nuclear physics
phase transitions
cosmology
Boyanovsky D, de Vega HJ, Schwarz D. Phase transitions in the early and present universe. <em>ANNUAL REVIEW OF NUCLEAR AND PARTICLE SCIENCE</em>. 2006;56(1):441-500.
The evolution of the universe is the ultimate laboratory for studying fundamental physics across energy-scales that span approximately 25 orders of magnitude. The standard models of cosmology and particle physics provide the basic understanding of the early and present universe and predict a series of phase transitions that occurred in succession during the universe's expansion and cooling history. We survey these phase transitions, highlighting the equilibrium and nonequilibrium effects as well as their observational and cosmological consequences. We discuss the current theoretical and experimental programs studying phase transitions in QCD and nuclear matter in accelerators. A critical assessment of similarities and differences between the conditions in the early universe and those in ultrarelativistic heavy ion collisions is presented. Cosmological observations and accelerator experiments are converging toward an unprecedented understanding of the early and present universe.
ANNUAL REVIEWS
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596660
eng
info:eu-repo/semantics/altIdentifier/doi/10.1146/annurev.nucl.56.080805.140539
info:eu-repo/semantics/altIdentifier/issn/0163-8998
info:eu-repo/semantics/altIdentifier/issn/1545-4134
info:eu-repo/semantics/altIdentifier/wos/000242732600012
info:eu-repo/semantics/altIdentifier/arxiv/hep-ph/0602002
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596665
2020-06-19T10:11:00Z
review
doc-type:review
Sadowski, Dieter: Personalökonomie und Arbeitspolitik
Sadowski, Dieter: Personal economy and labour policy
Becker, Fred G.
Becker FG. Sadowski, Dieter: Personalökonomie und Arbeitspolitik. <em>Zeitschrift für Personalforschung</em>. 2006;20(4):393-400.
RAINER HAMPP VERLAG
2006
http://purl.org/coar/resource_type/c_efa0
info:eu-repo/semantics/review
doc-type:review
text
https://pub.uni-bielefeld.de/record/1596665
deu
info:eu-repo/semantics/altIdentifier/wos/000242637900009
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596667
2018-07-24T12:58:52Z
journal_article
doc-type:article
On the way to supramolecular photochemistry at the single-molecule level
Schäfer, Christian
Decker, Björn
Letzel, Matthias
Novara, Francesca
Eckel, Rainer
Ros, Robert
Anselmetti, Dario ; https://orcid.org/0000-0002-8720-4369
Mattay, Jochen
resorc[4]arenes
single-molecule processes
mass spectrometry
photoswitches
atomic force microscopy
Schäfer C, Decker B, Letzel M, et al. On the way to supramolecular photochemistry at the single-molecule level. <em>Pure and Applied Chemistry</em>. 2006;78(12):2247-2259.
Two examples of artificial supramolecular host-guest systems derived from resorc[4]arenes (calix[n]arenes based on resorcinol) and ammonium ions as guests have been studied by atomic force microscopy (AFM). For the first time, real single-molecule events have been determined for this type of supramolecular complexes and off-rates as well as molecular parameters of single-molecule aggregates such as the depths of the binding pocket (molecular length parameter) could be measured by applying the methods of dynamic force spectroscopy. In addition, this technique was also applied to differentiate between the two states (open and closed) of a photoswitchable resorc[4]arene-anthracene tweezer. An investigation of the exchange rates of various complexes in the gas phase by means of Fourier transform ion cyclotron resonance (FTICR) mass spectrometry confirmed the results of the AFM study.
INT UNION PURE APPLIED CHEMISTRY
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596667
eng
info:eu-repo/semantics/altIdentifier/doi/10.1351/pac200678122247
info:eu-repo/semantics/altIdentifier/issn/0033-4545
info:eu-repo/semantics/altIdentifier/issn/1365-3075
info:eu-repo/semantics/altIdentifier/wos/000242844300005
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596677
2018-07-24T12:58:57Z
journal_article
doc-type:article
Probing the chiral weak Hamiltonian at finite volumes
Hernandez, Pilar
Laine, Mikko ; https://orcid.org/0000-0002-2680-4213
kaon physics
chiral lagrangians
lattice QCD
weak decays
Hernandez P, Laine M. Probing the chiral weak Hamiltonian at finite volumes. <em>JOURNAL OF HIGH ENERGY PHYSICS</em>. 2006;2006(10): 069.
Non-leptonic kaon decays are often described through an effective chiral weak Hamiltonian, whose couplings ("low-energy constants") encode all non-perturbative QCD physics. It has recently been suggested that these low-energy constants could be determined at finite volumes by matching the non-perturbatively measured three-point correlation functions between the weak Hamiltonian and two left-handed flavour currents, to analytic predictions following from chiral perturbation theory. Here we complete the analytic side in two respects: by inspecting how small ("epsilon-regime") and intermediate or large ("p-regime") quark masses connect to each other, and by including in the discussion the two leading Delta I = 1/2 operators. We show that the epsilon-regime offers a straightforward strategy for disentangling the coefficients of the Delta I = 1/2 operators, and that in the p-regime finite-volume effects are significant in these observables once the pseudoscalar mass M and the box length L are in the regime ML less than or similar to 5.0.
INT SCHOOL ADVANCED STUDIES
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596677
eng
info:eu-repo/semantics/altIdentifier/doi/10.1088/1126-6708/2006/10/069
info:eu-repo/semantics/altIdentifier/issn/1126-6708
info:eu-repo/semantics/altIdentifier/issn/1029-8479
info:eu-repo/semantics/altIdentifier/wos/000242714400021
info:eu-repo/semantics/altIdentifier/arxiv/hep-lat/0607027
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596680
2021-06-07T13:18:27Z
journal_article
doc-type:article
Homoclinic orbits of non-autonomous maps and their approximation
Hüls, Thorsten
homoclinic orbits
invariant fiber bundles
transversality
numerical
approximation
approximation error
non-autonomous
non-autonomous discrete time dynamical systems
Hüls T. Homoclinic orbits of non-autonomous maps and their approximation. <em>JOURNAL OF DIFFERENCE EQUATIONS AND APPLICATIONS</em>. 2006;12(11):1103-1126.
We consider homoclinic orbits in non-autonomous discrete time dynamical systems of the form Xn+l = f(n)(x(n)), n is an element of Z, where it is assumed that an n independent fixed point exists. A numerical method for computing finite approximations of transversal homoclinic orbits is introduced and a detailed error analysis is presented. The non-autonomous setup requires special tools. We prove that the analytic condition of transversality of the orbit corresponds to a transversal intersection of the corresponding invariant fiber bundles. The approximation method and the validity of the error estimate is illustrated by an example.
TAYLOR & FRANCIS LTD
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596680
eng
info:eu-repo/semantics/altIdentifier/doi/10.1080/10236190601045713
info:eu-repo/semantics/altIdentifier/issn/1023-6198
info:eu-repo/semantics/altIdentifier/wos/000242772500002
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596697
2018-07-24T12:57:55Z
journal_article
doc-type:article
Magnetizing angle dependence of planar Hall resistance in spin-valve structure
Thanh, N. T.
Chun, M. G.
Schmalhorst, Jan-Michael ; https://orcid.org/0000-0003-1622-9726
Reiss, Günter ; https://orcid.org/0000-0002-0918-5940
Kim, K. Y.
Kim, C. G.
Spin-valve multilayer
Planar hall resistance
Magnetizing angle
Thanh NT, Chun MG, Schmalhorst J-M, Reiss G, Kim KY, Kim CG. Magnetizing angle dependence of planar Hall resistance in spin-valve structure. <em>JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS</em>. 2006;304(1): e84-e87.
Planar Hall Resistance (PHR) has been measured in spin-valve structure as function of magnetizing angle alpha from the easy axis of the free layer. The PHR curves are sensitively changed with alpha, and becomes anti-symmetric at alpha = 90 degrees. These various PHR curves, being qualitatively consist with magnetization curves, are well ascribed for by the domain rotation. The PHR signal change and their field sensitivity are revealed to be maximum at alpha = 15 degrees, 140 mu V and 18.7 mu V/Oe respectively, for 1 mA sensing current. (C) 2006 Elsevier B. V. All rights reserved.
ELSEVIER SCIENCE BV
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596697
eng
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jmmm.2006.01.186
info:eu-repo/semantics/altIdentifier/issn/0304-8853
info:eu-repo/semantics/altIdentifier/wos/000207211700028
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596705
2018-07-24T12:57:55Z
journal_article
doc-type:article
Transcriptional regulation of catabolic pathways for aromatic compounds in Corynebacterium glutamicum
Brinkrolf, Karina
Brune, Iris
Tauch, Andreas
transcriptional regulation
hydroxyquinol pathway
beta-ketoadipate pathway
pathway
gentisate
Corynebacterium efficiens
Corynebacterium glutamicum
Brinkrolf K, Brune I, Tauch A. Transcriptional regulation of catabolic pathways for aromatic compounds in Corynebacterium glutamicum. <em>GENETICS AND MOLECULAR RESEARCH</em>. 2006;5(4):773-789.
Corynebacterium glutamicum is a gram-positive soil microorganism able to utilize a large variety of aromatic compounds as the sole carbon source. The corresponding catabolic routes are associated with multiple ring-fission dioxygenases and among other channeling reactions, include the gentisate pathway, the protocatechuate and catechol branches of the beta-ketoadipate pathway and two potential hydroxyquinol pathways. Genes encoding the enzymatic machinery for the bioconversion of aromatic compounds are organized in several clusters in the C. glutamicum genome. Expression of the gene clusters is under specific transcriptional control, apparently including eight DNA-binding proteins belonging to the AraC, IclR, LuxR, PadR, and TetR families of transcriptional regulators. Expression of the gentisate pathway involved in the utilization of 3-hydroxybenzoate and gentisate is positively regulated by an IclR-type activator. The metabolic channeling of ferulate, vanillin and vanillate into the protocatechuate branch of the beta-ketoadipate pathway is controlled by a PadR-like repressor. Regulatory proteins of the IclR and LuxR families participate in transcriptional regulation of the branches of the beta-ketoadipate pathway that are involved in the utilization of benzoate, 4-hydroxybenzoate and protocatechuate. The channeling of phenol into this pathway may be under positive transcriptional control by an AraC-type activator. One of the potential hydroxyquinol pathways of C. glutamicum is apparently repressed by a TetR-type regulator. This global analysis revealed that transcriptional regulation of aromatic compound utilization is mainly controlled by single regulatory proteins sensing the presence of aromatic compounds, thus representing single input motifs within the transcriptional regulatory network of C. glutamicum.
FUNPEC-EDITORA
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596705
eng
info:eu-repo/semantics/altIdentifier/issn/1676-5680
info:eu-repo/semantics/altIdentifier/wos/000203012000017
info:eu-repo/semantics/altIdentifier/pmid/17183485
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596709
2018-07-24T12:58:57Z
conference_abstract
doc-type:other
Water transport in the growing barley leaf
Fricke, W.
Wei, W.
Volkov, V.
Alexan-Dersson, E.
Kjellbom, P. O.
Hachez, C.
Draye, X.
Chaumont, F.
Moshelion, M.
Golldack, Dortje
Miller, T.
Fricke W, Wei W, Volkov V, et al. Water transport in the growing barley leaf. <em>COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY A-MOLECULAR & INTEGRATIVE PHYSIOLOGY</em>. 2006;143(4: Suppl.):S42-S43.
ELSEVIER SCIENCE INC
2006
http://purl.org/coar/resource_type/c_c94f
info:eu-repo/semantics/other
doc-type:other
text
https://pub.uni-bielefeld.de/record/1596709
eng
info:eu-repo/semantics/altIdentifier/issn/1095-6433
info:eu-repo/semantics/altIdentifier/wos/000202991700009
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596724
2018-07-24T12:57:55Z
conference_abstract
doc-type:other
Principal components as motor synergies of human catching movements
Bockemühl, Till
Dürr, Volker ; https://orcid.org/0000-0001-9239-4964
Troje, N. F.
Bockemühl T, Dürr V, Troje NF. Principal components as motor synergies of human catching movements. <em>COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY A-MOLECULAR & INTEGRATIVE PHYSIOLOGY</em>. 2006;143(4 (S):S110-S111.
ELSEVIER SCIENCE INC
2006
http://purl.org/coar/resource_type/c_c94f
info:eu-repo/semantics/other
doc-type:other
text
https://pub.uni-bielefeld.de/record/1596724
eng
info:eu-repo/semantics/altIdentifier/issn/1095-6433
info:eu-repo/semantics/altIdentifier/wos/000202991700225
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596728
2018-07-24T12:58:57Z
conference_abstract
doc-type:other
Neural modelling of adaptive limb movements of the stick insect
Schütz, Christoph
Dürr, Volker ; https://orcid.org/0000-0001-9239-4964
Environment
system
Controller
NETWORKS
velocity
input
FREQUENCY
Adaptation
limb movements
Stick Insect
insect
Root
Locomotion
joint angles
model
muscle model
Muscle
torque
joint torque
JOINT
Algorithm
motion capture
Kinematics
load
Carausius
leg
Front Leg
Reaching
Arthropod
SENSORY INPUTS
movement
Information
sensory
MOVEMENTS
Nervous system
Modelling
control
limb
Schütz C, Dürr V. Neural modelling of adaptive limb movements of the stick insect. <em>Comparative Biochemistry and Physiology A, Molecular & Integrative Physiology</em>. 2006;143(4: Suppl.):S111-S112.
ELSEVIER SCIENCE INC
2006
http://purl.org/coar/resource_type/c_c94f
info:eu-repo/semantics/other
doc-type:other
text
https://pub.uni-bielefeld.de/record/1596728
eng
info:eu-repo/semantics/altIdentifier/issn/1095-6433
info:eu-repo/semantics/altIdentifier/wos/000202991700229
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596731
2018-07-24T12:57:55Z
journal_article
doc-type:article
Visual exploratory analysis of DCE-MRI data in breast cancer by dimensional data reduction: A comparative study
Varini, Claudio
Degenhard, Andreas
Nattkemper, Tim Wilhelm ; https://orcid.org/0000-0002-7986-1158
Visual data exploration
Embedding (LLE)
Principal Component Analysis (PCA)
Dimensional data reduction
Self-Organizing
Maps (SOM)
Locally Linear
Varini C, Degenhard A, Nattkemper TW. Visual exploratory analysis of DCE-MRI data in breast cancer by dimensional data reduction: A comparative study. <em>BIOMEDICAL SIGNAL PROCESSING AND CONTROL</em>. 2006;1(1):56-63.
One trend in modern medical imaging is the growing signal dimension in new multi-modal or multivariate imaging approaches. To analyze such high dimensional data. new approaches need to be proposed and evaluated. The Scope Of this study is to investigate the potential of three different algorithms for dimensional data reduction for the visual exploration of biomedical signals arising front dynamic contrast-enhanced magnetic resonance (DCE-MRI) applied to breast cancer detection. The algorithms employed are the established Principal Component Analysis (PCA) and Self-Organizing Maps (SOM) and the recently proposed Locally Linear Embedding (LLE). The experimental dataset comprises the time-series associated with the voxels of six benign and six malignant breast juniors. Ill order to visually explore the dataset, the multi-dimensional signal space of all the time-series is projected into a two-dimensional space by PCA, SOM and LLE, respectively, We show how the visualization of the respective projected spaces with customized colors call allow the user to discover hidden regularities in the data. ill particular with regard to the differentiation between benign and malignant lesions, The performances of the three algorithms are quantitatively compared. while discussing their advantages and drawbacks. (c) 2006 Elsevier Ltd. All rights reserved.
ELSEVIER SCI LTD
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596731
eng
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.bspc.2006.05.001
info:eu-repo/semantics/altIdentifier/issn/1746-8094
info:eu-repo/semantics/altIdentifier/wos/000205644200006
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596736
2020-12-27T16:19:19Z
journal_article
doc-type:article
The synthesis of cryptophycins
Eissler, Stefan
Stoncius, Arvydas
Nahrwold, Markus
Sewald, Norbert ; https://orcid.org/0000-0002-0309-2655
drugs
natural products
total synthesis
medicinal chemistry
peptides
Eissler S, Stoncius A, Nahrwold M, Sewald N. The synthesis of cryptophycins. <em>SYNTHESIS</em>. 2006;2006(22):3747-3789.
Nature provides a huge reservoir of highly diverse chemical compounds with interesting biological properties. Secondary metabolites continue to represent promising candidates for therapeutic applications and drugs are very often based on natural products. Frequently, the total synthesis of such compounds is a real challenge, and this also drives the development of new synthetic methodology. This review article focuses on the biochemistry and chemistry of cryptophycins, a class of 16-membered macrocyclic depsipeptides. The first representative was isolated more than 15 years ago from cyanobacteria. With respect to structure, the class can be subdivided into two structural categories, containing either an epoxide or an alkene moiety. The bioactivity of cryptophycins is based on their ability to interact with tubulin. They display considerable tumour-selective cytotoxicity both against multidrug-resistant tumour cell lines and solid tumours implanted in mice. Consequently, cryptophycin derivatives are considered as potential antitumour drugs. Despite the fact that the cryptophycins were discovered only recently, several different synthetic approaches have already been published. In addition to information on the synthesis of the subunits A-D, strategies for both their assembly and the macrocyclisation are compiled in this review. 1 Structural and Biological Features of Cryptophycins 1.1 The Cryptophycins: A Short History 1.2 Structural Features 1.3 Tubulin as a Drug Target 1.4 Biological Activity of Cryptophycins 1.5 Structure-Activity Relationship 2 Synthesis of the Building Blocks 2.1 Syntheses of Unit A with Two Stereogenic Centres 2.2 Syntheses of Unit A with Four Stereogenic Centres 2.3 Units B, C, and D 3 Coupling of Units and Cyclisation 3.1 Cyclisation between Units C and B 3.2 Cyclisation between Units A and B 3.3 Homer-Wadsworth-Emmons Reaction and Ring-Closing Metathesis 3.4 Other Cyclisation Methods 4 Epoxidation 4.1 m-Chloroperoxybenzoic Acid 4.2 Dimethyldioxirane 4.3 Diol-Epoxide Conversion 4.4 Halohydrins 5 Reactions of Cryptophycins 6 Conclusion and Outlook.
GEORG THIEME VERLAG KG
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596736
eng
info:eu-repo/semantics/altIdentifier/doi/10.1055/s-2006-950332
info:eu-repo/semantics/altIdentifier/issn/0039-7881
info:eu-repo/semantics/altIdentifier/issn/1437-210X
info:eu-repo/semantics/altIdentifier/wos/000242535300001
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596744
2018-07-24T12:58:52Z
journal_article
doc-type:article
Significance of microbial colonisation in materials for orthopedic technology. New insights
Kipp, F.
Angermeier, K.
Koller, A.
Wetz, H. H.
Hornberg, Claudia
diabetic foot
disinfection
tissue infection
soft
infection control
orthopaedic technological materials
Kipp F, Angermeier K, Koller A, Wetz HH, Hornberg C. Significance of microbial colonisation in materials for orthopedic technology. New insights. <em>ORTHOPADE</em>. 2006;35(11):1146-+.
A great problem in the treatment of diabetes are infections of diabetic feet. A likely reservoir of microorganisms are contaminated orthopaedic materials. Insoles from 70 patients were examined for potential microbial colonisation. Commonly employed materials were contaminated in vitro under standardised conditions using known microorganisms. After treating with an alcoholic skin disinfectant, the organisms were counted semiquantitatively. In addition to pathogens, the surfaces showed mainly microorganisms present in the normal skin flora. In all materials tested, disinfection reduced the number of organisms by 4-5 log orders. It could be shown that simple disinfection (wiping) reduces the microorganisms present on orthopaedic materials to an acceptable number. Further studies are needed to determine whether this also reduces the incidence of diabetic skin and soft tissue infection.
SPRINGER
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596744
deu
info:eu-repo/semantics/altIdentifier/doi/10.1007/s00132-006-1012-0
info:eu-repo/semantics/altIdentifier/issn/0085-4530
info:eu-repo/semantics/altIdentifier/wos/000242648200005
info:eu-repo/semantics/altIdentifier/pmid/17036234
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596751
2018-07-24T12:58:52Z
journal_article
doc-type:article
The importance of MRSA in patient care. Epidemiology, prevention and therapy
Hornberg, Claudia
Knoop, D.
Kipp, F.
methicillin-resistant staphylococcus aureus (MRSA)
infections
multiresistant pathogens
infection prevention
nosocomial
surveillance
Hornberg C, Knoop D, Kipp F. The importance of MRSA in patient care. Epidemiology, prevention and therapy. <em>ORTHOPADE</em>. 2006;35(11):1159-+.
Methicillin-resistant Staphylococcus aureus (MRSA) has for several years been increasingly spreading at inpatient and outpatient health care facilities. This constitutes a great epidemiological problem. Measures are needed for MRSA management, including screening, hygiene, containment, and sanitation as well as for a stricter control of antibiotic use. In order to be able to monitor and assess the MRSA problem in the future, there are surveillance systems which can provide approaches for continuously improving MRSA management and thus offer a long-term solution. In this context, regional networks for implementing MRSA prevention strategies are of particular importance. Their goal is reducing MRSA-caused infections in an area and stop circulation of MRSA between the various health care facilities. For the management of MRSA infections, interdisciplinary cooperation between the attending orthopedic specialist and the clinical microbiologist is very important for planning an effective treatment regimen to ensure a successful outcome, particularly in view of the growing shortage of resources in the healthcare system.
SPRINGER
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596751
deu
info:eu-repo/semantics/altIdentifier/doi/10.1007/s00132-006-1015-x
info:eu-repo/semantics/altIdentifier/issn/0085-4530
info:eu-repo/semantics/altIdentifier/wos/000242648200007
info:eu-repo/semantics/altIdentifier/pmid/17053923
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596756
2018-07-24T12:58:52Z
journal_article
doc-type:article
Deprotonations and charges of well-defined {Mo72Fe30} nanoacids simply stepwise tuned by pH allow control/variation of related self-assembly processes
Liu, Tianbo
Imber, Brandon
Diemann, Ekkehard
Liu, Guang
Cokleski, Katrina
li, Huin Li
Chen, Zhiqiang
Müller, Achim ; https://orcid.org/0000-0003-0117-4021
Liu T, Imber B, Diemann E, et al. Deprotonations and charges of well-defined {Mo72Fe30} nanoacids simply stepwise tuned by pH allow control/variation of related self-assembly processes. <em>JOURNAL OF THE AMERICAN CHEMICAL SOCIETY</em>. 2006;128(49):15914-15920.
The solution behavior of the largest inorganic acid known thus far, the neutral, spherical iron/molybdenum/oxide nanocluster {Mo72Fe30} (equivalent to{(Mo-VI)Mo-5(VI)}(12)Fe-30(III) 1a), including the pH-controlled deprotonation, is reported. The acidic properties are due to the 30 peripheral, weakly acidic Fe-III(H2O) groups that form a unique Archimedean solid with all edges and dihedral angles being equal, the icosidodecahedron, and therefore an "isotropic" surface. Interestingly, the aqueous solutions are stable even for months because of the inertness of the spherical solutes and the presence of the hard FeIII and Mo-VI centers. The stability can be nicely proven by the very characteristic Raman spectrum showing, because of the (approximately) icosahedral symmetry, only a few lines. Whereas the {Mo72Fe30} clusters exist as discrete, almost neutral, molecules in aqueous solution at pH < 2.9, they get deprotonated and self-associate into single-layer blackberry-type structures at higher pH while the assembly process (i.e., the size of the final species) can be controlled by the pH values; this allows the deliberate generation of differently sized nanoparticles, a long-term goal in nanoscience. The average hydrodynamic radius (R-h) of the self-assembled structures decreases monotonically with increasing number of charges on the {Mo72Fe30} macroanions (from similar to 45 nm at pH similar to 3.0 to similar to 15 nm at pH approximate to 6.6), as studied by laser light scattering and TEM techniques. The {Mo72Fe30} macroions with high-stability tunable charges/surfaces, equal shape, and masses provide models for the understanding of more complex polyelectrolyte solutions while the controllable association and dissociation reported here of the assembled soft magnetic materials with tuneable sizes could be interesting for practical applications.
AMER CHEMICAL SOC
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596756
eng
info:eu-repo/semantics/altIdentifier/doi/10.1021/ja066133n
info:eu-repo/semantics/altIdentifier/issn/0002-7863
info:eu-repo/semantics/altIdentifier/issn/1520-5126
info:eu-repo/semantics/altIdentifier/wos/000242575300066
info:eu-repo/semantics/altIdentifier/pmid/17147404
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596766
2019-05-06T13:44:35Z
journal_article
doc-type:article
Homology of multiplicative Lie rings
Bak, Anthony
Donadze, G.
Inassaridze, N.
Ladra, M.
Bak A, Donadze G, Inassaridze N, Ladra M. Homology of multiplicative Lie rings. <em>Journal of Pure and Applied Algebra</em>. 2007;208(2):761-777.
Two homology theories of multiplicative Lie rings are constructed, studied and compared with the usual homology theories of groups and Lie rings. Central extensions of multiplicative Lie rings are introduced. It is shown that the Steinberg multiplicative Lie ring of a ring is the direct product of the Steinberg group (viewed as a multiplicative Lie ring under the commutator bracket) and the Steinberg Lie ring. (c) 2006 Published by Elsevier B.V.
ELSEVIER SCIENCE BV
2007
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596766
eng
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jpaa.2006.03.029
info:eu-repo/semantics/altIdentifier/issn/0022-4049
info:eu-repo/semantics/altIdentifier/wos/000242632500028
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596781
2018-07-24T12:57:55Z
journal_article
doc-type:article
GC-MS based metabolite profiling implies three interdependent ways of ammonium assimilation in Medicago truncatula root nodules
Barsch, Aiko
Carvalho, Helena G.
Cullimore, Julie V.
Niehaus, Karsten
phosphinotricine
metabolite profiling
Medicago truncatula
glutamine synthetase
GC-MS
Barsch A, Carvalho HG, Cullimore JV, Niehaus K. GC-MS based metabolite profiling implies three interdependent ways of ammonium assimilation in Medicago truncatula root nodules. <em>Journal of Biotechnology</em>. 2006;127(1):79-83.
In symbiotic interaction with legume plants, bacteria termed Rhizobia can fix massive amounts of atmospheric nitrogen which is primarily provided in the form of ammonium to the host plants. Therefore, legume root nodules that house the symbiotic bacteria are ideally suited to study the process of primary ammonium assimilation. Here, we present a GC-MS based metabolite profiling analysis of Medicago truncatula root nodules (induced by the bacterium Sinorhizobium meliloti) before and after inhibition of glutamine synthetase (GS) by the chemical herbicide phosphinotricine. The primary role of GS in ammonium assimilation was revealed by drastically reduced levels of glutamine in phosphinotricine treated root nodules. In comparison to previous results of increased asparagine synthetase transcript and protein abundances in GS inhibited nodules the metabolic data revealed that decreased amounts of aspartate might preclude taking advantage of this elevated enzymatic activity. A potential role of glutamate dehydrogenase in ammonium assimilation was metabolically indicated 24 and 48 h after GS inhibition. Therefore, nodule ammonium assimilation might in principle involve three interdependent metabolic pathways which are adjusted to control basic nitrogen metabolism. (c) 2006 Elsevier B.V. All rights reserved.
Elsevier
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596781
eng
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jbiotec.2006.06.007
info:eu-repo/semantics/altIdentifier/issn/0168-1656
info:eu-repo/semantics/altIdentifier/wos/000242683100008
info:eu-repo/semantics/altIdentifier/pmid/16870293
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596787
2018-07-24T12:58:52Z
conference
doc-type:conferenceObject
Believability testing and Bayesian imitation in interactive computer games
Gorman, Bernard
Thurau, Christian
Bauckhage, Christian
Humphrys, Mark
Nolfi, Stefano
Gorman B, Thurau C, Bauckhage C, Humphrys M. Believability testing and Bayesian imitation in interactive computer games. In: Nolfi S, ed. <em>From animals to animats 9 : proceedings. 9th International Conference on Simulation of Adaptive Behavior</em>. Lecture Notes in Artificial Intelligence, 4095. Berlin: Springer-Verlag; 2006: 655-666.
In imitation learning, agents are trained to carry out certain actions by examining a demonstration of the task at hand. Though common in robotics, little work has been done in translating these concepts to computer games. Given that present-day games generally use antiquated AI techniques which can often lead to stilted, mechanical and conspicuously artificial behaviour, it seems likely that approaches based on the imitation of human players may produce agents which convey a more humanlike impression than their traditional counterparts. At the same time, there exists no formal method of quantifying what constitutes a 'humanlike' impression; an equivalent of the Turing test is needed, with the requirement that an agent's appearance and behaviour be capable of deceiving an observer into misidentifying it as human. The aims of this paper are thus threefold; we describe an approach to the imitation of strategic behaviour and motion, propose a formal method of quantifying the degree to which different agents are perceived as 'humanlike', and present the results of a series of experiments using these two systems.
Springer-Verlag
2006
http://purl.org/coar/resource_type/c_5794
info:eu-repo/semantics/conferenceObject
doc-type:conferenceObject
text
https://pub.uni-bielefeld.de/record/1596787
eng
info:eu-repo/semantics/altIdentifier/isbn/978-3-540-38608-7
info:eu-repo/semantics/altIdentifier/wos/000242125300054
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596792
2018-07-24T12:58:57Z
journal_article
doc-type:article
Complementation analyses of Sinorhizobium meliloti nifA mutant with different originated nifA genes
Yao, Z.
Tian, Z.
Dai, X.
Becker, Anke
Li, J.
Yan, H.
Xiao, Y.
Zhu, J.
Yu, G.
Rueverg, Silvia
Wang, Y.
Zou, H.
gene expression
NifA
Sinorhizobium meliloti
microarray
Yao Z, Tian Z, Dai X, et al. Complementation analyses of Sinorhizobium meliloti nifA mutant with different originated nifA genes. <em>CHINESE SCIENCE BULLETIN</em>. 2006;51(22):2748-2754.
A previous work inferred that the nifA gene of Enterobacter cloacae did not restore the symbiotic phenotype of Sinorhizobium meliloti nifA mutant. In the present study, two nifA genes of Bradyrhizobiurn japonicum and Mesorhizobium huakuii also did not restore the symbiotic phenotype of S. meliloti nifA mutant. In whole genomic microarray experiments, 238 genes were found to be differentially expressed after S. meliloti nifA had been constitutively expressed in its nifA mutant. In contrast, only 20, 7 and 9 genes changed their transcriptional levels when expressing B. japonium, M. huakuii and Enterobacter cloacae nifA genes in Sm nifA mutant separately. These genes were classified into severai functional groups including house keeping, energy and central intermediary metabolism, transport systems and symbiosis. Interestingly, the genes that of nifH operons showed high expression levels in the presence of either B. japonium or M. huakuii NifA, which was confirmed by subsequent lacZ fusion experiments.
SCIENCE CHINA PRESS
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596792
eng
info:eu-repo/semantics/altIdentifier/doi/10.1007/s11434-006-2203-0
info:eu-repo/semantics/altIdentifier/issn/1001-6538
info:eu-repo/semantics/altIdentifier/issn/1861-9541
info:eu-repo/semantics/altIdentifier/wos/000242609200012
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596811
2018-07-24T12:58:44Z
conference
doc-type:conferenceObject
A Unifying View of Genome Rearrangements
Bergeron, Anne
Mixtacki, Julia
Stoye, Jens ; https://orcid.org/0000-0002-4656-7155
Bergeron A, Mixtacki J, Stoye J. A Unifying View of Genome Rearrangements. In: <em>Proc. of WABI 2006</em>. LNBI. Vol 4175. SPRINGER-VERLAG BERLIN; 2006: 163-173.
Genome rearrangements have been modeled by a variety of operations such as inversions, translocations, fissions, fusions, transpositions and block interchanges. The double cut and join operation, introduced by Yancopoulos et al., allows to model all the classical operations while simplifying the algorithms. In this paper we show a simple way to apply this operation to the most general type of genomes with a mixed collection of linear and circular chromosomes. We also describe a graph structure that allows simplifying the theory and distance computation considerably, as neither capping nor concatenation of the linear chromosomes are necessary.
SPRINGER-VERLAG BERLIN
2006
http://purl.org/coar/resource_type/c_5794
info:eu-repo/semantics/conferenceObject
doc-type:conferenceObject
text
https://pub.uni-bielefeld.de/record/1596811
eng
info:eu-repo/semantics/altIdentifier/doi/10.1007/11851561_16
info:eu-repo/semantics/altIdentifier/issn/0302-9743
info:eu-repo/semantics/altIdentifier/wos/000242125600016
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596815
2019-02-28T14:43:23Z
conference
doc-type:conferenceObject
Integer linear programs for discovering approximate gene clusters
Rahmann, Sven
Klau, Gunnar W.
Bücher, P.
Moret, B.M.E.
Rahmann S, Klau GW. Integer linear programs for discovering approximate gene clusters. In: Bücher P, Moret BME, eds. <em>Algorithms in Bioinformatics. WABI 2006</em>. Lecture Notes in Computer Science. Vol 4175. Berlin: Springer; 2006: 298-309.
We contribute to the discussion about the concept of approximate conserved gene clusters by presenting a class of definitions that (1) can be written as integer linear programs (ILPs) and () allow several variations that include existing definitions such as common intervals, r-windows, and max-gap clusters or gene teams. While the ILP formulation does not directly lead to optimal algorithms, it provides unprecedented generality and is competitive in practice for those cases where efficient algorithms axe known. It allows for the first time a non-heuristic study of large approximate clusters in several genomes. Source code and datasets are available at http://gi.cebitec.uni-bielefeld.de/assb.
Springer
2006
http://purl.org/coar/resource_type/c_5794
info:eu-repo/semantics/conferenceObject
doc-type:conferenceObject
text
https://pub.uni-bielefeld.de/record/1596815
eng
info:eu-repo/semantics/altIdentifier/doi/10.1007/11851561_28
info:eu-repo/semantics/altIdentifier/issn/0302-9743
info:eu-repo/semantics/altIdentifier/isbn/9783540395836
info:eu-repo/semantics/altIdentifier/wos/000242125600028
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596821
2018-07-24T12:58:52Z
journal_article
doc-type:article
Long-term field release of bioluminescent Sinorhizobium meliloti strains to assess the influence of a recA mutation on the strains' survival
Selbitschka, Werner
Keller, M.
Miethling-Graff, R.
Dresing, U.
Schwieger, F.
Krahn, I.
Homann, I.
Dammann-Kalinowski, T.
Pühler, Alfred ; https://orcid.org/0000-0003-4723-2960
Tebbe, C. C.
Selbitschka W, Keller M, Miethling-Graff R, et al. Long-term field release of bioluminescent Sinorhizobium meliloti strains to assess the influence of a recA mutation on the strains' survival. <em>MICROBIAL ECOLOGY</em>. 2006;52(3):583-595.
A field release experiment was carried out to study the fate of the isogenic, firefly luciferase (luc) gene-tagged Sinorhizobium meliloti strains L1 (RecA(-)) and L33 (RecA(+)) in the environment. Both strains were released at concentrations of approximately 10(6) cfu g(-1) soil in replicate and randomized field plots, which had been sown with alfalfa (Medicago sativa). The survival of both strains during the following 7 years could be subdivided into three phases: a sharp decline for more than two orders of magnitude within the first 4 months (phase I), followed by fluctuations around an average number of 10(4) cfu g(-1) soil for nearly 4 years (phase II), and a further decline to approximately 60 cfu g(-1) (phase III). At most sampling dates, no significant differences in the survival of both strains were detected, indicating that the recA gene function was dispensable under these environmental conditions. During the field inoculation, both strains were dispersed accidentally by wind in small numbers to noninoculated field plots. Strain L33 established at a concentration of more than 10(3) cfu g(-1) soil with subsequent seasonal fluctuations. Although strain L1 must have been disseminated to a similar extent, it could never be recovered from noninoculated field plots, indicating that the recA mutation interfered with the strain's capability to establish there. At the beginning of the field experiment, an indigenous alfalfa-nodulating population was below the limit of detection. In the following years, however, an indigenous population arose, which finally outcompeted both strains for saprophytic growth and alfalfa nodulation. RecA(-) strain L1 was outcompeted for alfalfa nodulation slightly faster than its RecA(+) counterpart L33. The diversity of the indigenous population was characterized by employing the Enterobacterial Repetitive Intergenic Consensus polymerase chain reaction fingerprint method. Typing of 2731 root nodule isolates revealed a total of 38 fingerprint groups. More than 80% of the isolates could be grouped into six dominant fingerprint groups, indicating that a few dominant bacterial strain types had outcompeted the released strains.
SPRINGER
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596821
eng
info:eu-repo/semantics/altIdentifier/doi/10.1007/s00248-006-9056-6
info:eu-repo/semantics/altIdentifier/issn/0095-3628
info:eu-repo/semantics/altIdentifier/issn/1432-184X
info:eu-repo/semantics/altIdentifier/wos/000242464700023
info:eu-repo/semantics/altIdentifier/pmid/16924432
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596836
2020-02-07T14:48:47Z
journal_article
doc-type:article
Progressive taxation, public capital, and endogenous growth
Greiner, Alfred
progressive taxation
fiscal policy
public capital
endogenous growth
Greiner A. Progressive taxation, public capital, and endogenous growth. <em>FINANZARCHIV</em>. 2006;62(3):353-366.
This paper presents and analyzes an endogenous growth model with public capital and progressive taxation. Two versions are considered: The first version assumes that the budget of the government is balanced at each point of time. The second allows for public debt but asserts that the ratio of the primary surplus to gross domestic income is a positive linear function of the debt/income ratio, which guarantees that public debt is sustainable. The paper then derives necessary conditions for the existence of a sustainable balanced growth path for the analytical model. Further, simulations are undertaken in order to gain insight into growth effects of varying the slope of the tax schedule and in order to find how the tax scheme affects the dynamics of the model.
MOHR SIEBECK
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596836
eng
info:eu-repo/semantics/altIdentifier/doi/10.1628/001522106X153419
info:eu-repo/semantics/altIdentifier/issn/0015-2218
info:eu-repo/semantics/altIdentifier/issn/1614-0974
info:eu-repo/semantics/altIdentifier/wos/000242492700003
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596846
2018-07-24T12:58:13Z
journal_article
doc-type:article
World Championship 2006 in Germany: Sponsorship through Coca Cola, McDonald's, Anheuser-Busch
Krämer, Alexander ; https://orcid.org/0000-0003-2774-7860
Krämer A. World Championship 2006 in Germany: Sponsorship through Coca Cola, McDonald's, Anheuser-Busch. <em>EUROPEAN JOURNAL OF PUBLIC HEALTH</em>. 2006;16(6):682-682.
OXFORD UNIV PRESS
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596846
eng
info:eu-repo/semantics/altIdentifier/doi/10.1093/eurpub/ckl226
info:eu-repo/semantics/altIdentifier/issn/1101-1262
info:eu-repo/semantics/altIdentifier/wos/000242472500023
info:eu-repo/semantics/altIdentifier/pmid/16963463
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596896
2018-07-24T12:58:13Z
journal_article
doc-type:article
Nematodes of Lake Constance, Germany, with special reference to littoral communities of a river mouth area
Witthoeft-Muehlmann, Andre
Traunspurger, Walter
Rothhaupt, Karl Otto
abundance
disturbance
feeding types
freshwater
Daptonema dubium
spatial pattern
temporal pattern
trophic relation
Witthoeft-Muehlmann A, Traunspurger W, Rothhaupt KO. Nematodes of Lake Constance, Germany, with special reference to littoral communities of a river mouth area. <em>NEMATOLOGY</em>. 2006;8(4):539-553.
Six sites within the littoral habitat of Lake Constance in Germany were studied from February 1999 to January 2000 in order to determine the influence of the inflowing River Schussen on local nematode assemblages. The sites were selected to represent a gradient of river influence within the broader river mouth area. The area as a whole was found to be rich in nematode diversity, with 106 nematode species identified. The nematode communities recorded ranged in density from 121 to 165 individuals/10 cm(2) and in biomass from 108 to 503 mu g wet weight/10 cm(2). They were also shown to vary in terms of feeding ecology, with significant differences in the proportions of feeding types occurring among site. Deposit feeders were most abundant, followed by chewers, although the latter dominated in terms of biomass. Epistrate feeders were less common and suction feeders rare. The occurrence of epistrate feeders was linked to the concentration of algal pigment, whereas records of deposit feeders and chewers correlated with bacterial density and organic carbon content. The characters of the different nematode communities in the vicinity of the river mouth were found to reflect the transitional nature of the study area.
BRILL ACADEMIC PUBLISHERS
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596896
eng
info:eu-repo/semantics/altIdentifier/doi/10.1163/156854106778614029
info:eu-repo/semantics/altIdentifier/issn/1388-5545
info:eu-repo/semantics/altIdentifier/issn/1568-5411
info:eu-repo/semantics/altIdentifier/wos/000242376600007
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596900
2018-07-24T12:58:44Z
journal_article
doc-type:article
Implications of neuroscientific findings for jurisprudence
Markowitsch, Hans J.
Markowitsch HJ. Implications of neuroscientific findings for jurisprudence. <em>KRIMINALISTIK</em>. 2006;60(10):619-625.
KRIMINALISTIK VERLAG
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596900
deu
info:eu-repo/semantics/altIdentifier/issn/0023-4699
info:eu-repo/semantics/altIdentifier/wos/000242322500008
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596902
2019-05-29T10:33:40Z
journal_article
doc-type:article
Nonequilibrium Glauber-type dynamics in continuum
Kondratiev, Yuri
Kutoviy, Oleksandr V.
Zhizhina, Elena
Kondratiev Y, Kutoviy OV, Zhizhina E. Nonequilibrium Glauber-type dynamics in continuum. <em>JOURNAL OF MATHEMATICAL PHYSICS</em>. 2006;47(11): 113501.
We construct the nonequilibrium Glauber dynamics as a Markov process in configuration space for an infinite particle system in continuum with a general class of initial distributions. This class we define in terms of correlation functions bounds and it is preserved during the Markov evolution we constructed. (c) 2006 American Institute of Physics.
AMER INST PHYSICS
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596902
eng
info:eu-repo/semantics/altIdentifier/doi/10.1063/1.2354589
info:eu-repo/semantics/altIdentifier/issn/0022-2488
info:eu-repo/semantics/altIdentifier/wos/000242408200020
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596907
2019-07-17T09:43:15Z
journal_article
doc-type:article
Markov processes associated with L-p-resolvents and applications to stochastic differential equations on Hilbert space
Beznea, Lucian
Boboc, Nicu
Röckner, Michael
stochastic differential equations on
Hilbert spaces
Lyapunov functions
infinitesimal invariant measures
L-p-resolvents
right processes
Beznea L, Boboc N, Röckner M. Markov processes associated with L-p-resolvents and applications to stochastic differential equations on Hilbert space. <em>Journal of Evolution Equations</em>. 2006;6(4):745-772.
We give general conditions on a generator of a C-o-semigroup (resp. of a C-o-resolvent) on L-p (E, mu), p >= 1, where E is an arbitrary (Lusin) topological space and mu a sigma-finite measure on its Borel sigma-algebra, so that it generates a sufficiently regular Markov process on E. We present a general method how these conditions can be checked in many situations. Applications to solve stochastic differential equations on Hilbert space in the sense of a martingale problem are given.
Birkhäuser
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596907
eng
info:eu-repo/semantics/altIdentifier/doi/10.1007/s00028-006-0287-2
info:eu-repo/semantics/altIdentifier/issn/1424-3199
info:eu-repo/semantics/altIdentifier/wos/000242441500008
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596911
2018-07-24T12:58:13Z
book_chapter
doc-type:bookPart
Chemists and their craft in fiction film
Weingart, Peter ; https://orcid.org/0000-0002-8275-525X
Schummer, Joachim Schummer
Bensaude-Vincent, Bernadette Bensaude-Vincent
Van Tiggelen, Brigitte Van Tiggelen
scientist
chemistry in movies
alchemy
public perception of science
mad
Weingart P. Chemists and their craft in fiction film. In: Schummer JS, Bensaude-Vincent BB-V, Van Tiggelen BVT, eds. <em>The public image of chemistry</em>. Singapore: World Scientific Publishing; 2007: 383.
The paper presents results from a quantitative analysis of some 200 fiction films. Chemistry is the iconic discipline of the 'mad scientist' reflecting the alchemical imagery that was prevalent until recently (and can still be identified) in the depiction of science in films. Other results show the ambivalence with which primarily the natural sciences are represented in popular movies.
World Scientific Publishing
2007
http://purl.org/coar/resource_type/c_3248
info:eu-repo/semantics/bookPart
doc-type:bookPart
text
https://pub.uni-bielefeld.de/record/1596911
eng
info:eu-repo/semantics/altIdentifier/isbn/9789812775849
info:eu-repo/semantics/altIdentifier/wos/000242260300003
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596913
2018-07-24T12:58:57Z
journal_article
doc-type:article
Overproduction and increased molecular weight account for the symbiotic activity of the rkpZ-modified K polysaccharide from Sinorhizobium meliloti Rm1021
Sharypova, L. A.
Chataigne, G.
Fraysse, N.
Becker, A.
Poinsot, V.
electrospray ionization-mass spectrometry
rkpZ
surface polysaccharide
host invasion
lipid anchor
Sharypova LA, Chataigne G, Fraysse N, Becker A, Poinsot V. Overproduction and increased molecular weight account for the symbiotic activity of the rkpZ-modified K polysaccharide from Sinorhizobium meliloti Rm1021. <em>GLYCOBIOLOGY</em>. 2006;16(12):1181-1193.
K polysaccharides (KPSs) of Sinorhizobium meliloti strains are strain-specific surface polysaccharides analogous to the group II K antigens of Escherichia coli. The K(R)5 antigen of strain AK631 is a highly polymerized disaccharide of pseudaminic and glucuronic acids. During invasion of host plants, this K antigen is able to replace the structurally different exopolysaccharide succinoglycan (EPS I) and promotes the formation of a nitrogen-fixing (Fix(+)) symbiosis. The KPS of strain Rm1021 is a homopolymer of 3-deoxy-d-manno-2 octulosonic acid (Kdo). The Kdo polysaccharide is covalently linked to the lipid anchor, has a low molecular weight (LMW), and is symbiotically inactive. On introduction of the Rm41-specific rkpZ gene into strain Rm1021, a modified KPS is expressed that is able to substitute EPS I during symbiosis with the host plant. To better understand the nature of modification conferred by rkpZ, we performed a structural analysis of the KPS using nuclear magnetic resonance (NMR), electrospray ionization-mass spectrometry (ESI-MS), and gas chromatography (GC-MS). The modified KPS retained primary polyKdo structure, but its degree of polymerization (DP) and level of production were increased significantly. In contrast to the wild-type polyKdo, only a part of polyKdo was lipidated. Shorter polysaccharide chains were lipid-free, whereas longer polysaccharide chains were lipidated. Sinorhizobium meliloti Rm1021 was found to carry two paralogs of rkpZ. Both genes are involved in polyKdo production, but they only show partial functional activity as compared with the rkpZ of Rm41.
OXFORD UNIV PRESS INC
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596913
eng
info:eu-repo/semantics/altIdentifier/doi/10.1093/glycob/cwl042
info:eu-repo/semantics/altIdentifier/issn/0959-6658
info:eu-repo/semantics/altIdentifier/issn/1460-2423
info:eu-repo/semantics/altIdentifier/wos/000242270800004
info:eu-repo/semantics/altIdentifier/pmid/16957092
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596920
2018-07-24T12:58:58Z
journal_article
doc-type:article
The preparation and absolute configurations of enantiomerically pure C-4-symmetric tetraalkoxyresorcin[4]arenes obtained from camphorsulfonate derivatives
Buckley, Benjamin R.
Page, Philip C. Bulman
Chan, Yohan
Heaney, Harry
Klaes, Michael
McIldowie, Matthew J.
McKee, Vickie
Mattay, Jochen
Mocerino, Mauro
Moreno, Eduardo
Skelton, Brian W.
White, Allan H.
camphorsulfonates
chiral auxiliaries
configuration
diastereoselectivity
determination
hydrolysis
resorcin[4]arenes
axial chirality
Mannich reactions
Buckley BR, Page PCB, Chan Y, et al. The preparation and absolute configurations of enantiomerically pure C-4-symmetric tetraalkoxyresorcin[4]arenes obtained from camphorsulfonate derivatives. <em>European Journal of Organic Chemistry</em>. 2006;2006(22):5135-5151.
The preparation of a series of diastereoisomeric tetracamphorsulfonates derived from racemic tetramethoxyresorcin[4]arenes was achieved by reactions with an excess of (S)(+)-10-camphorsulfonyl chloride in pyridine followed by isolation using flash chromatography. Tetradeprotonation of a number of tetramethoxyresorcin[4]arenes using n-butyllithium in tetrahydrofuran, followed by reactions using (S)-(+)10-camphorsulfonyl chloride, gave the same tetracamphorsulfonates. Mono-, di- and tricamphorsulfonates were also prepared following selective deprotonation. In the reactions with tetraisopropyloxy- and tetracyclopentyloxyresorcin[4]arenes, only the mono- and dicamphorsulfonates were formed. X-ray crystallographic analysis established the absolute configurations of three diastereoisomerically pure tetracamphorsulfonates, including a diastereoisomer prepared from 6,12,18,24-tetramethoxy-2,8,14,20-tetrakis(2-methylpropyl)resorcin[4]are ne. An additional pair of diastereoisomers was also prepared using (R)-(-)-10-camphorsulfonyl chloride and 6,12,18,24-tetramethoxy-2,8,14,20-tetrakis(2-methylpropyl)resorcin[4]are ne, for one of which the structure was confirmed by an additional X-ray structure determination. Hydrolytic removal of the camphorsulfonyl residue(s) from the various diastereoisomers gave enantiomers of known absolute configurations. In some cases, the chiral nonracemic tetraalkoxyresorcin[4]arenes were converted into known tetrabenzoxazine derivatives by using N,N-bis(methoxymethyl)[(S)-(-)-(a-methylbenzyl)]amine in thermal or microwave - assisted reactions. (c) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006.
WILEY-V C H VERLAG
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596920
eng
info:eu-repo/semantics/altIdentifier/doi/10.1002/ejoc.200600591
info:eu-repo/semantics/altIdentifier/issn/1434-193X
info:eu-repo/semantics/altIdentifier/issn/1099-0690
info:eu-repo/semantics/altIdentifier/wos/000242300100018
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596934
2018-07-24T12:58:52Z
journal_article
doc-type:article
Quantitative determination of adrenaline and noradrenaline in urine using liquid chromatography-tandem mass spectrometry
Thomas, Andreas
Geyer, H.
Mester, H. J.
Schaenzer, W.
Zimmermann, Elke
Thevis, M.
column liquid chromatography-mass spectrometry
stress factors
adrenaline and noradrenaline in urine
urine
catecholamines in
Thomas A, Geyer H, Mester HJ, Schaenzer W, Zimmermann E, Thevis M. Quantitative determination of adrenaline and noradrenaline in urine using liquid chromatography-tandem mass spectrometry. <em>CHROMATOGRAPHIA</em>. 2006;64(9-10):587-591.
The quantitative determination of adrenaline (A) and noradrenaline (N) in human urine provides a helpful tool for sports sciences as well as clinical purposes. A rapid and highly specific procedure based on an off-line sample preparation using weak cation exchange solid phase extraction (CX-SPE) followed by liquid chromatography-tandem mass spectrometry (LC-MS-MS) was developed that allowed the unambiguous identification of the target analytes at low (10 ng mL(-1) A and N), medium and high (500 ng mL(-1) A and N) physiological concentration levels. Recovery rates ranged from 104 to 111 %, precisions of better than 15% and a linear approximation in the aimed working range were obtained for both compounds. Thus, this method provides a rugged and highly specific alternative to the commonly used electrochemical or fluorescence detection strategies. In- and out-of-competition catecholamine concentrations in urine samples of six professional German first division soccer players were determined demonstrating an obvious decrease of the N/A-ratio post-competition, compared to pre-competition and out-of-competition values providing a parameter for the estimation of physiological and psychological stress.
VIEWEG
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596934
eng
info:eu-repo/semantics/altIdentifier/doi/10.1365/s10337-006-0067-8
info:eu-repo/semantics/altIdentifier/issn/0009-5893
info:eu-repo/semantics/altIdentifier/issn/1612-1112
info:eu-repo/semantics/altIdentifier/wos/000242425600016
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596952
2020-10-13T10:40:41Z
journal_article
doc-type:article
Sexual imprinting on a novel blue ornament in zebra finches
Witte, Klaudia
Caspers, Barbara ; https://orcid.org/0000-0002-4380-0476
zebra finch
mate choice
sexual imprinting
novel ornamentation
Witte K, Caspers B. Sexual imprinting on a novel blue ornament in zebra finches. <em>BEHAVIOUR</em>. 2006;143(8):969-991.
Sexual imprinting plays an important role for the development of mate preferences in birds. We tested whether male and female zebra finches Taeniopygia guttata sexually imprinted on an evolutionary novel trait, a blue feather on the forehead in parents. Additionally, we tested whether males and females would transfer a learned preference for the blue feather to a preference for blue leg bands, and whether a potential mate with two novel blue traits can amplify its attractiveness. Offspring were raised by parents in four different imprinting groups: (1) both parents unadorned; (2) the mother adorned only; (3) the father adorned only; (4) both parents adorned with the blue feather. After young reached maturity, we tested their mate preference for adorned and unadorned conspecifics of the opposite sex in binary choice tests. Females of the father adorned imprinting group sexually imprinted on the blue feather, and females reared by adorned parents showed a tendency to prefer adorned males. None of the males sexually imprinted on the blue feather. Our study replicates the results of a previous study on sexual imprinting on a red feather in zebra finches. We, therefore, propose a sex difference in the learning process of sexual imprinting. Females sexually imprinted on the blue feather did not transfer the learned preference to males with blue leg bands, and two novel blue traits could not amplify the attractiveness in males and females for the opposite sex. Our study emphasizes the role of sexual imprinting for the cultural evolution in mate preferences in zebra finches.
BRILL ACADEMIC PUBLISHERS
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596952
eng
info:eu-repo/semantics/altIdentifier/doi/10.1163/156853906778623626
info:eu-repo/semantics/altIdentifier/issn/0005-7959
info:eu-repo/semantics/altIdentifier/issn/1568-539X
info:eu-repo/semantics/altIdentifier/wos/000242085500003
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596955
2018-07-24T12:58:44Z
journal_article
doc-type:article
How flexible are poly(para-phenyleneethynylene)s?
Godt, Adelheid
Schulte, Miriam
Zimmermann, Herbert
Jeschke, Gunnar
shape persistence
spin
labeling
EPR spectroscopy
polymers
chain model
Godt A, Schulte M, Zimmermann H, Jeschke G. How flexible are poly(para-phenyleneethynylene)s? <em>ANGEWANDTE CHEMIE-INTERNATIONAL EDITION</em>. 2006;45(45):7560-7564.
WILEY-V C H VERLAG GMBH
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596955
eng
info:eu-repo/semantics/altIdentifier/doi/10.1002/anie.200602807
info:eu-repo/semantics/altIdentifier/issn/1433-7851
info:eu-repo/semantics/altIdentifier/issn/1521-3773
info:eu-repo/semantics/altIdentifier/wos/000242325500018
info:eu-repo/semantics/altIdentifier/pmid/17051574
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596965
2018-07-24T12:58:52Z
journal_article
doc-type:article
When dry air is too humid
Peter, Thomas
Marcolli, Claudia
Spichtinger, Peter
Corti, Thierry
Baker, Marcia B.
Koop, Thomas ; https://orcid.org/0000-0002-7571-3684
Peter T, Marcolli C, Spichtinger P, Corti T, Baker MB, Koop T. When dry air is too humid. <em>SCIENCE</em>. 2006;314(5804):1399-1402.
AMER ASSOC ADVANCEMENT SCIENCE
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596965
eng
info:eu-repo/semantics/altIdentifier/doi/10.1126/science.1135199
info:eu-repo/semantics/altIdentifier/issn/0036-8075
info:eu-repo/semantics/altIdentifier/issn/1095-9203
info:eu-repo/semantics/altIdentifier/wos/000242406100022
info:eu-repo/semantics/altIdentifier/pmid/17138887
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1596976
2020-10-29T20:21:33Z
journal_article
doc-type:article
Complete genome of the mutualistic, N-2-fixing grass endophyte Azoarcus sp strain BH72
Krause, Andrea
Ramakumar, Adarsh
Bartels, Daniela
Battistoni, Federico
Bekel, Thomas
Boch, Jens
Boehm, Melanie
Friedrich, Frauke
Hurek, Thomas
Krause, Lutz
Linke, Burkhard
McHardy, Alice C.
Sarkar, Abhijit
Schneiker-Bekel, Susanne
Syed, Arshad Ali
Thauer, Rudolf
Vorhölter, Frank-Jörg
Weidner, Stefan
Pühler, Alfred ; https://orcid.org/0000-0003-4723-2960
Reinhold-Hurek, Barbara
Kaiser, Olaf
Goesmann, Alexander ; https://orcid.org/0000-0002-7086-2568
Krause A, Ramakumar A, Bartels D, et al. Complete genome of the mutualistic, N-2-fixing grass endophyte Azoarcus sp strain BH72. <em>Nature Biotechnology</em>. 2006;24(11):1385-1391.
Azoarcus sp. strain BH72, a mutualistic endophyte of rice and other grasses, is of agrobiotechnological interest because it supplies biologically fixed nitrogen to its host and colonizes plants in remarkably high numbers without eliciting disease symptoms. The complete genome sequence is 4,376,040-bp long and contains 3,992 predicted protein-coding sequences. Genome comparison with the Azoarcus-related soil bacterium strain EbN1 revealed a surprisingly low degree of synteny. Coding sequences involved in the synthesis of surface components potentially important for plant-microbe interactions were more closely related to those of plant-associated bacteria. Strain BH72 appears to be 'disarmed' compared to plant pathogens, having only a few enzymes that degrade plant cell walls; it lacks type III and IV secretion systems, related toxins and an N-acyl homoserine lactones-based communication system. The genome contains remarkably few mobile elements, indicating a low rate of recent gene transfer that is presumably due to adaptation to a stable, low-stress microenvironment.
Nature Publ. Group
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1596976
eng
info:eu-repo/semantics/altIdentifier/doi/10.1038/nbt1243
info:eu-repo/semantics/altIdentifier/issn/1087-0156
info:eu-repo/semantics/altIdentifier/wos/000242124700035
info:eu-repo/semantics/altIdentifier/pmid/17057704
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1597000
2018-07-24T12:58:58Z
journal_article
doc-type:article
Namensbasierte Identifizierung von Fällen mit türkischer Herkunft im Kinderkrebsregister Mainz
Name-based identification of cases of Turkish origin in the Childhood Cancer Registry in Mainz
Spallek, Jacob
Kaatsch, P.
Spix, C.
Ulusoy, N.
Zeeb, Hajo
Razum, Oliver
cancer
Turkish children
transients and migrants
cancer registry
Spallek J, Kaatsch P, Spix C, Ulusoy N, Zeeb H, Razum O. Namensbasierte Identifizierung von Fällen mit türkischer Herkunft im Kinderkrebsregister Mainz. <em>Gesundheitswesen</em>. 2006;68(10):643-649.
Until now few analyses of routine data relating to the health of migrants have been conducted in Germany. A major obstacle is that most data sources do not provide reliable information on the origin of migrants. While some sources contain the nationality of persons registered, this information does not allow one to identify migrants who have taken up German citizenship, i.e., a substantial part of second-generation migrants. In this paper we demonstrate how a computer-aided, name-based algorithm can be used to identify persons of Turkish origin in the German Childhood Cancer Registry in Mainz, Germany. The performance of the algorithm, as assessed against the gold standard of assessing names manually, was very good (sensitivity and specificity >= 0.975). In total, we identified 1774 of the 37259 cases in the registry as being of Turkish origin. The name algorithm proved to be a useful tool to identify Turkish migrants in routine data sources, thus avoiding potential bias due to changes in citizenship. This approach aims at improving migrant-sensitive health reporting and research in Germany. In future, additional information on migrant status should be obtained already during primary data collection so that health data for all migrant groups can be provided.
Thieme
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1597000
deu
info:eu-repo/semantics/altIdentifier/doi/10.1055/s-2006-927166
info:eu-repo/semantics/altIdentifier/issn/0941-3790
info:eu-repo/semantics/altIdentifier/issn/1439-4421
info:eu-repo/semantics/altIdentifier/wos/000242184000008
info:eu-repo/semantics/altIdentifier/pmid/17099826
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1597019
2018-07-24T12:58:52Z
journal_article
doc-type:article
Heparan sulfate 6-O-endosulfatases: discrete in vivo activities and functional co-operativity
Lamanna, William C.
Baldwin, Rebecca J.
Padva, Michael
Kalus, Ina
ten Dam, Gerdy
van Kuppevelt, Toin H.
Gallagher, John T.
von Figura, Kurt
Dierks, Thomas
Merry, Catherine L. R.
signal transduction
sulfatase
knock-out mice
heparan sulfate
glycosaminoglycan
endosulfatase
Lamanna WC, Baldwin RJ, Padva M, et al. Heparan sulfate 6-O-endosulfatases: discrete in vivo activities and functional co-operativity. <em>BIOCHEMICAL JOURNAL</em>. 2006;400(1):63-73.
HS (heparan sulfate) is essential for normal embryonic development. This requirement is due to the obligatory role for HS in the signalling pathways of many growth factors and morphogens that bind to sulfated domains in the HS polymer chain. The sulfation patterning of HS is determined by a complex interplay of Golgi-located N- and O-sulfotransferases which sulfate the heparan precursor and cell surface endosulfatases that selectively remove 6-O-sulfates from mature HS chains. In the present study we generated single or double knock-out mice for the two murine endosulfatases mSulf1 and mSulf2. Detailed structural analysis of HS from mSulf1(-/-) fibroblasts showed a striking increase in 6-O-sulfation. which was not seen in mSulf2(-/-) HS. Intriguingly, the level of 6-O-suffation in the double mSulf1(-/-)/2(-/-) HS was significantly higher than that observed in the mSulf1(-/-) counterpart. These data imply that mSulf1 and mSulf2 are functionally co-operative. Unlike their avian orthologues, mammalian Sulf activities are not restricted to the highly sulfated S-domains of HS. Mitogenesis assays with FGF2 (fibroblast growth factor 2) revealed that Sulf activity decreases the activating potential of newly-synthesized HS, suggesting an important role for these enzymes in cell growth regulation in embryonic and adult tissues.
PORTLAND PRESS LTD
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1597019
eng
info:eu-repo/semantics/altIdentifier/doi/10.1042/BJ20060848
info:eu-repo/semantics/altIdentifier/issn/0264-6021
info:eu-repo/semantics/altIdentifier/issn/1470-8728
info:eu-repo/semantics/altIdentifier/wos/000242226600007
info:eu-repo/semantics/altIdentifier/pmid/16901266
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1597045
2018-07-24T12:58:52Z
conference
doc-type:conferenceObject
Hypergeometric representation of a four-loop vacuum bubble
Bejdakic, E.
Schroeder, York ; https://orcid.org/0000-0003-3535-4194
epsilon expansion
Feynman graph: higher-order
talk: Eisenach 2006/04/23
Bejdakic E, Schroeder Y. Hypergeometric representation of a four-loop vacuum bubble. In: <em>Nuclear Physics B - Proceedings Supplements</em>. Nucl.Phys.Proc.Suppl. Vol 160. Elsevier; 2006: 155-159.
In this article, we present a new analytic result for a certain single-mass- scale four-loop vacuum (bubble) integral. We also discuss its systematic c-expansion in d = 4-2 is an element of as well as d = 3-2 is an element of dimensions, the coefficients of which are expressible in terms of harmonic sums at infinity.
Elsevier
2006
http://purl.org/coar/resource_type/c_5794
info:eu-repo/semantics/conferenceObject
doc-type:conferenceObject
text
https://pub.uni-bielefeld.de/record/1597045
eng
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.nuclphysbps.2006.09.040
info:eu-repo/semantics/altIdentifier/issn/0920-5632
info:eu-repo/semantics/altIdentifier/wos/000242022800029
info:eu-repo/semantics/altIdentifier/arxiv/hep-ph/0607006
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1597049
2018-07-24T12:57:55Z
journal_article
doc-type:article
Magnetic vortex core reversal by excitation with short bursts of an alternating field
Van Waeyenberge, B.
Puzic, A.
Stoll, H.
Chou, K. W.
Tyliszczak, T.
Hertel, R.
Faehnle, M.
Brueckl, H.
Rott, Karsten
Reiss, Günter ; https://orcid.org/0000-0002-0918-5940
Neudecker, I.
Weiss, D.
Back, C. H.
Schuetz, G.
Van Waeyenberge B, Puzic A, Stoll H, et al. Magnetic vortex core reversal by excitation with short bursts of an alternating field. <em>NATURE</em>. 2006;444(7118):461-464.
The vortex state, characterized by a curling magnetization, is one of the equilibrium configurations of soft magnetic materials(1-4) and occurs in thin ferromagnetic square and disk-shaped elements of micrometre size and below. The interplay between the magneto-static and the exchange energy favours an in-plane, closed flux domain structure. This curling magnetization turns out of the plane at the centre of the vortex structure, in an area with a radius of about 10 nanometres-the vortex core(5-7). The vortex state has a specific excitation mode: the in-plane gyration of the vortex structure about its equilibrium position(8-10). The sense of gyration is determined by the vortex core polarization(11). Here we report on the controlled manipulation of the vortex core polarization by excitation with small bursts of an alternating magnetic field. The vortex motion was imaged by time-resolved scanning transmission X-ray microscopy(12). We demonstrate that the sense of gyration of the vortex structure can be reversed by applying short bursts of the sinusoidal excitation field with amplitude of about 1.5 mT. This reversal unambiguously indicates a switching of the out-of-plane core polarization. The observed switching mechanism, which can be understood in the framework of micromagnetic theory, gives insights into basic magnetization dynamics and their possible application in data storage.
NATURE PUBLISHING GROUP
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1597049
eng
info:eu-repo/semantics/altIdentifier/doi/10.1038/nature05240
info:eu-repo/semantics/altIdentifier/issn/0028-0836
info:eu-repo/semantics/altIdentifier/issn/1476-4687
info:eu-repo/semantics/altIdentifier/wos/000242215700040
info:eu-repo/semantics/altIdentifier/pmid/17122851
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1597065
2019-03-27T13:15:33Z
journal_article
doc-type:article
Surprises in approximating Levenshtein distances
Baake, Michael
Grimm, Uwe
Giegerich, Robert
Baake M, Grimm U, Giegerich R. Surprises in approximating Levenshtein distances. <em>JOURNAL OF THEORETICAL BIOLOGY</em>. 2006;243(2):279-282.
ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1597065
eng
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jtbi.2006.06.026
info:eu-repo/semantics/altIdentifier/issn/0022-5193
info:eu-repo/semantics/altIdentifier/wos/000241922700013
info:eu-repo/semantics/altIdentifier/pmid/16899257
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1597070
2019-06-06T09:04:12Z
journal_article
doc-type:article
Construction of asymmetric connectors of depth two
Ahlswede, Rudolf
Aydinian, Haratyun
connector
concentrator
rearrangeable network
Ahlswede R, Aydinian H. Construction of asymmetric connectors of depth two. <em>Journal of Combinatorial Theory. Series A</em>. 2006;113(8):1614-1620.
An (n, N)-connector of depth d is an acyclic digraph with n inputs and N outputs in which for any injective mapping of input vertices into output vertices there exist n vertex disjoint paths of length at most d joining each input to its corresponding output. In this paper we consider the problem of construction of sparse depth two connectors with n << N. We use posets of star products and their matching properties to construct such connectors. In particular, this gives a simple explicit construction for connectors of size O(N log n/log log n). Thus our earlier idea to use other posets than the family of subsets of a finite set was successful. (c) 2006 Elsevier Inc. All rights reserved.
ACADEMIC PRESS INC ELSEVIER SCIENCE
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1597070
eng
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jcta.2006.03.009
info:eu-repo/semantics/altIdentifier/issn/0097-3165
info:eu-repo/semantics/altIdentifier/wos/000242116400003
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1597073
2019-04-30T12:30:47Z
journal_article
doc-type:article
Maximal sets of numbers not containing k+1 pairwise coprimes and having divisors from a specified set of primes
Ahlswede, Rudolf
Blinovsky, Vladimir
greatest common divisor
coprimes
squarefree numbers
theoretical extremal problems
number
Ahlswede R, Blinovsky V. Maximal sets of numbers not containing k+1 pairwise coprimes and having divisors from a specified set of primes. <em>JOURNAL OF COMBINATORIAL THEORY SERIES A</em>. 2006;113(8):1621-1628.
We find the formula for the cardinality of a maximal set of integers from {1, ..., n} which does not contain k + 1 pairwise coprimes and each integer has a divisor from a specified set of r primes. We also find the explicit formula for this set, when r = k + 1. (c) 2006 Elsevier Inc. All rights reserved.
ACADEMIC PRESS INC ELSEVIER SCIENCE
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1597073
eng
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jcta.2006.03.015
info:eu-repo/semantics/altIdentifier/issn/0097-3165
info:eu-repo/semantics/altIdentifier/wos/000242116400004
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1597077
2018-07-24T12:58:15Z
journal_article
doc-type:article
Government versus opposition: Who should be who in the 16th German Bundestag?
Dimitrov, Dinko
Haake, Claus-Jochen
simple games
Shapley value
coalition formation
winning coalitions
Dimitrov D, Haake C-J. Government versus opposition: Who should be who in the 16th German Bundestag? <em>JOURNAL OF ECONOMICS</em>. 2006;89(2):115-128.
We model the process of coalition formation in the 16th German Bundestag as a hedonic coalition formation game. In order to induce players' preferences in the game we apply the Shapley value of the simple game describing all winning coalitions in the Bundestag. Using different stability notions for hedonic games we prove that the ``most'' stable government is formed by the Union Parties together with the Social Democratic Party.
SPRINGER WIEN
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1597077
eng
info:eu-repo/semantics/altIdentifier/doi/10.1007/s00712-006-0207-5
info:eu-repo/semantics/altIdentifier/issn/0931-8658
info:eu-repo/semantics/altIdentifier/issn/1617-7134
info:eu-repo/semantics/altIdentifier/wos/000241900300002
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1597109
2018-07-24T12:58:15Z
journal_article
doc-type:article
Exogenous cAMP upregulates the expression of glnII and glnK-amtB genes in Sinorhizobium meliloti 1021
Tian, Z.X.
Mao, X.
Su, Wei
Li, J.
Becker, Anke
Wang, Yiping
glnK
glnII
Sinorhizobium meliloti
cAMP
Tian ZX, Mao X, Su W, Li J, Becker A, Wang Y. Exogenous cAMP upregulates the expression of glnII and glnK-amtB genes in Sinorhizobium meliloti 1021. <em>CHINESE SCIENCE BULLETIN</em>. 2006;51(16):1982-1985.
The existence of multiple adenylate cyclase encoding genes implies the importance of cAMP in Sinorhizobium meliloti 1021. In this study, as a pioneer step of understanding CAMP roles, microarray analysis on S. meliloti was carried out for the function of exogenous CAMP. To our surprise, the result showed that the transcriptions of gInII and gInK genes were significantly upshifted in the presence of exogenous CAMP in S. meliloti. This phenomenon is further confirmed in S. meliloti that the expression of either glnll or gInK promoter-lacZ translational fusion is higher in the presence of exogenous cAMP. Therefore, for the first time, we have identified genes from S. meliloti whose expression is activated by CAMP. The potential physiological role of upregulation of glnll and g1nK by cAMP is discussed.
SCIENCE CHINA PRESS
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1597109
eng
info:eu-repo/semantics/altIdentifier/doi/10.1007/s11434-006-2079-z
info:eu-repo/semantics/altIdentifier/issn/1001-6538
info:eu-repo/semantics/altIdentifier/issn/1861-9541
info:eu-repo/semantics/altIdentifier/wos/000241849100010
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1597117
2018-07-24T12:58:44Z
journal_article
doc-type:article
ddc:610
journal_articleFtxt
open_access
Associations between preschool attendance and developmental impairments in pre-school children in a six-year retrospective survey
Stich, Heribert L.
Baune, Bernhard T.
Caniato, Riccardo N.
Krämer, Alexander ; https://orcid.org/0000-0003-2774-7860
ddc:610
Stich HL, Baune BT, Caniato RN, Krämer A. Associations between preschool attendance and developmental impairments in pre-school children in a six-year retrospective survey. <em>BMC Public Health</em>. 2006;6(1):260.
Background: Many school-aged children suffer physical and mental impairments which can adversely affect their development and result in significant morbidity. A high proportion of children in western countries attend pre-school, and it is likely that the preschool environment influences the prevalence and severity of these impairments. Currently there is insufficient data available on the prevalence of these impairments and their causal associations. The influence that location of a pre-school and the duration of preschool attendance have on the prevalence of these impairments is not known. Methods: In a retrospective survey spanning six years (1997-2002) we reviewed the records of 6,230 preschool children who had undergone routine school entry assessments. These children had been assessed utilising a modified manual of the "Bavarian Model" for school entry examinations. This model outlines specific criteria for impairments of motor, cognitive, behavioural and psychosocial functioning. Prevalence rates for physical and behavioural impairments were based on the results of these assessments. The relationship between the prevalence of impairments and the duration of preschool attendance and the location of the preschool attended was estimated utilizing logistic regression models. Results: We found that 20.7% of children met the criteria for at least one type of impairment. Highest prevalence rates (11.5%) were seen for speech impairments and lowest (3.5%) for arithmetic impairments. Boys were disproportionately over represented, with 25.5% meeting the criteria for impairment, compared to 13.0% for girls. Children who had attended preschool for less than one year demonstrated higher rates of impairment (up to 19.1% for difficulties with memory, concentration or perseverance) compared to those who had attended for a longer duration (up to 11.6% for difficulties with pronouncation). Children attending preschool in an urban location had slightly elevated rates of impairment (up to 12.7%), compared to their rural counterparts (up to 11.1%). Conclusion: Our results demonstrate that there are high prevalence rates for physical and mental impairments among preschool children. Furthermore, children without preschool experience are a risk group for struggling with educational successes. The associations between the duration of preschool attendance and location of preschool attended and rates of impairment need replication and further exploration. Larger prospective studies are needed to examine if these relationships are causal and may therefore lend themselves to specific intervention strategies.
BIOMED CENTRAL LTD
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://nbn-resolving.org/urn:nbn:de:0070-pub-15971178
https://pub.uni-bielefeld.de/record/1597117
https://pub.uni-bielefeld.de/download/1597117/2311112
eng
info:eu-repo/semantics/altIdentifier/doi/10.1186/1471-2458-6-260
info:eu-repo/semantics/altIdentifier/issn/1471-2458
info:eu-repo/semantics/altIdentifier/wos/000241873800001
info:eu-repo/semantics/altIdentifier/pmid/17054777
info:eu-repo/semantics/openAccess
https://rightsstatements.org/vocab/InC/1.0/
oai:pub.uni-bielefeld.de:1597123
2018-07-24T12:58:15Z
journal_article
doc-type:article
ddc:610
journal_articleFtxt
open_access
Health-related quality of life in diabetic patients and controls without diabetes in refugee camps in the Gaza strip: a cross-sectional study
Eljedi, Ashraf
Mikolajczyk, Rafael T.
Krämer, Alexander ; https://orcid.org/0000-0003-2774-7860
Laaser, Ulrich
ddc:610
Eljedi A, Mikolajczyk RT, Krämer A, Laaser U. Health-related quality of life in diabetic patients and controls without diabetes in refugee camps in the Gaza strip: a cross-sectional study. <em>BMC Public Health</em>. 2006;6(1):268.
Background: Prevalence of diabetes mellitus is increasing in developed and developing countries. Diabetes is known to strongly affect the health-related quality of life (HRQOL). HRQOL is also influenced by living conditions. We analysed the effects of having diabetes on HRQOL under the living conditions in refugee camps in the Gaza strip. Methods: We studied a sample of 197 diabetic patients who were recruited from three refugee camps in the Gaza strip and 197 age- and sex-matched controls living in the same camps. To assess HRQOL, we used the World Health Organization Quality of Life questionnaire (WHOQOL-BREF) including four domains (physical health, psychological, social relations and environment). Domain scores were compared for cases (diabetic patients) and controls (persons without diabetes) and the impact of socio-economic factors was evaluated in both groups. Results: All domains were strongly reduced in diabetic patients as compared to controls, with stronger effects in physical health (36.7 vs. 75.9 points of the 0-100 score) and psychological domains (34.8 vs. 70.0) and weaker effects in social relationships (52.4 vs. 71.4) and environment domains (23.4 vs. 36.2). The impact of diabetes on HRQOL was especially severe among females and older subjects (above 50 years). Low socioeconomic status had a strong negative impact on HRQOL in the younger age group (< 50 years). Conclusion: HRQOL is strongly reduced in diabetic patients living in refugee camps in the Gaza strip. Women and older patients are especially affected.
BIOMED CENTRAL LTD
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://nbn-resolving.org/urn:nbn:de:0070-pub-15971232
https://pub.uni-bielefeld.de/record/1597123
https://pub.uni-bielefeld.de/download/1597123/2311113
eng
info:eu-repo/semantics/altIdentifier/doi/10.1186/1471-2458-6-268
info:eu-repo/semantics/altIdentifier/issn/1471-2458
info:eu-repo/semantics/altIdentifier/wos/000241874200001
info:eu-repo/semantics/altIdentifier/pmid/17074088
info:eu-repo/semantics/openAccess
https://rightsstatements.org/vocab/InC/1.0/
oai:pub.uni-bielefeld.de:1597131
2018-07-24T12:58:44Z
journal_article
doc-type:article
Carbohydrate mimics promote functional recovery after peripheral nerve repair
Simova, Olga
Irintchev, Andrey
Mehanna, Ali
Liu, Jiankun
Dihne, Marcel
Baechle, Dirk
Sewald, Norbert ; https://orcid.org/0000-0002-0309-2655
Loers, Gabriele
Schachner, Melitta
Simova O, Irintchev A, Mehanna A, et al. Carbohydrate mimics promote functional recovery after peripheral nerve repair. <em>ANNALS OF NEUROLOGY</em>. 2006;60(4):430-437.
Objective: The outcome of peripheral nerve repair is often unsatisfactory, and efficient therapies are not available. We tested the therapeutic potential of functional mimics of the human natural killer cell glycan (3-sulfoglucuronyl beta 1-3 galactoside) (HNK-1) epitope, a carbohydrate indicated to favor specificity of motor reinnervation in mice. Methods: We applied a linear HNK-1 mimic peptide, scrambled peptide, or vehicle substances in polyethylene cuffs used to reconstruct the severed femoral nerves of adult mice. We used video-based motion analysis and morphological and tracing techniques to monitor the outcome of nerve repair. Results: After glycomimetic application, quadriceps muscle function recovered to 93% of normal within 3 months. Restoration of function was less complete (71-76%) in control groups. Better functional recovery was associated with larger motoneuron somata, better axonal myelination in the quadriceps nerve, and enhanced precision of target reinnervation. Lesion-induced death of motoneurons was reduced by 20 to 25%. The glycomimetic enhanced survival and neurite outgrowth of both mouse and human motoneurons in vitro by 30 to 75%. Application of a novel cyclic glycomimetic also enhanced functional recovery in vivo. Interpretation: The improved outcome of nerve repair after glycomimetic application may be attributed to neurotrophic effects. Our results hold promise for therapeutic use in humans.
WILEY-LISS
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1597131
eng
info:eu-repo/semantics/altIdentifier/doi/10.1002/ana.20948
info:eu-repo/semantics/altIdentifier/issn/0364-5134
info:eu-repo/semantics/altIdentifier/wos/000242055200012
info:eu-repo/semantics/altIdentifier/pmid/16958115
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1597146
2018-07-24T12:58:52Z
journal_article
doc-type:article
How can multimodal cues from child-directed interaction reduce learning complexity in robots?
Rohlfing, Katharina
Fritsch, Jannik
Wrede, Britta ; https://orcid.org/0000-0003-1424-472X
Jungmann, Tanja
multi-modal motherese
child-directed input
motionese
learning mechanisms
Rohlfing K, Fritsch J, Wrede B, Jungmann T. How can multimodal cues from child-directed interaction reduce learning complexity in robots? <em>Advanced Robotics</em>. 2006;20(10):1183-1199.
Robots have to deal with an enormous amount of sensory stimuli. One solution in making sense of them is to enable a robot system to actively search for cues that help structuring the information. Studies with infants reveal that parents support the learning-process by modifying their interaction style, dependent on their child's developmental age. In our study, in which parents demonstrated everyday actions to their preverbal children (8-11 months old), our aim was to identify objective parameters for multimodal action modification. Our results reveal two action parameters being modified in adult-child interaction: roundness and pace. Furthermore, we found that language has the power to help children structuring actions sequences by synchrony and emphasis. These insights are discussed with respect to the built-in attention architecture of a socially interactive robot, which enables it to understand demonstrated actions. Our algorithmic approach towards automatically detecting the task structure in child-designed input demonstrates the potential impact of insights from developmental learning on robotics. The presented findings pave the way to automatically detect when to imitate in a demonstration
VSP BV
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1597146
eng
info:eu-repo/semantics/altIdentifier/doi/10.1163/156855306778522532
info:eu-repo/semantics/altIdentifier/issn/0169-1864
info:eu-repo/semantics/altIdentifier/issn/1568-5535
info:eu-repo/semantics/altIdentifier/wos/000241925000007
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1597153
2018-07-24T12:58:52Z
journal_article
doc-type:article
Interference of spin states in resonant photoemission induced by circularly polarized light from magnetized Gd
Müller, Norbert
Khalil, T.
Pohl, M.
Uphues, T.
Polcik, M.
Rader, O.
Heigl, F.
Starke, K.
Fritzsche, S.
Kabachnik, Nikolay M.
Heinzmann, Ulrich
Müller N, Khalil T, Pohl M, et al. Interference of spin states in resonant photoemission induced by circularly polarized light from magnetized Gd. <em>PHYSICAL REVIEW B</em>. 2006;74(16): 161401.
We have observed the spin-state interference by measuring the photoelectron spin polarization in the resonant preedge 4d -> 4f photoemission from magnetized Gd. The photoemission is induced by circularly polarized light which determines one preferential direction of electron spin orientation due to polarization transfer and spin-orbit interaction. Another direction perpendicular to the first one is determined by the target electron spin orientation connected with the target magnetization. We have measured the component of spin polarization perpendicular to those two directions which can only appear due to spin-state interference which implies coherence of the spin states produced by the two mechanisms of the photoelectron spin polarization.
AMERICAN PHYSICAL SOC
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1597153
eng
info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevB.74.161401
info:eu-repo/semantics/altIdentifier/issn/1098-0121
info:eu-repo/semantics/altIdentifier/issn/1550-235X
info:eu-repo/semantics/altIdentifier/wos/000241723700014
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1597166
2018-07-24T12:58:15Z
conference
doc-type:conferenceObject
An object-oriented approach using a top-down and bottom-up process for manipulative action recognition
Li, Zhe
Fritsch, Jannik
Wachsmuth, Sven ; https://orcid.org/0000-0001-5371-7214
Sagerer, Gerhard
Deutsche Arbeitsgemeinschaft für Mustererkennung
Österreichische Computer Gesellschaft. Arbeitskreis für Mustererkennung
Li Z, Fritsch J, Wachsmuth S, Sagerer G. An object-oriented approach using a top-down and bottom-up process for manipulative action recognition. In: Deutsche Arbeitsgemeinschaft für Mustererkennung, Österreichische Computer Gesellschaft. Arbeitskreis für Mustererkennung, eds. <em>Pattern Recognition, Proceedings</em>. Lecture Notes in Computer Science, 4174. Vol 4174. Berlin: Springer-Verlag; 2006: 212-221.
Different from many gesture-based human-robot interaction applications, which focused on the recognition of the interactional or the pointing gestures, this paper proposes a vision-based method for manipulative gesture recognition aiming to achieve natural, proactive, and non-intrusive interaction between humans and robots. The main contributions of the paper are an object-centered scheme for the segmentation and characterization of hand trajectory information, the use of particle filtering methods for an action primitive spotting, and the tight coupling of bottom-up and top-down processing that realizes a task-driven attention filter for low-level recognition steps. In contrast to purely trajectory based techniques, the presented approach is called object-oriented w.r.t. two different aspects: it is object-centered in terms of trajectory features that are defined relative to an object, and it uses object-specific models for action primitives. The system has a two-layer structure recognizing both the HMM-modeled manipulative primitives and the underlying task characterized by the manipulative primitive sequence. The proposed top-down and bottom-up mechanism between the two layers decreases the image processing load and improves the recognition rate.
Springer-Verlag
2006
http://purl.org/coar/resource_type/c_5794
info:eu-repo/semantics/conferenceObject
doc-type:conferenceObject
text
https://pub.uni-bielefeld.de/record/1597166
eng
info:eu-repo/semantics/altIdentifier/doi/10.1007/11861898_22
info:eu-repo/semantics/altIdentifier/issn/0302-9743
info:eu-repo/semantics/altIdentifier/isbn/9783540444121
info:eu-repo/semantics/altIdentifier/wos/000241486800022
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1597174
2018-07-24T12:58:44Z
journal_article
doc-type:article
Neuropsychological correlates of decision-making in ambiguous and risky situations
Brand, Matthias
Labudda, Kirsten
Markowitsch, Hans J.
executive functions
gambling
orbitofrontal cortex
prefrontal cortex
feedback processing
dorsolateral
Brand M, Labudda K, Markowitsch HJ. Neuropsychological correlates of decision-making in ambiguous and risky situations. <em>NEURAL NETWORKS</em>. 2006;19(8):1266-1276.
Decision-making situations in real life differ regarding their explicitness of positive and negative consequences as well as regarding the directness of probabilities for reward and punishment. In neuropsychological research, decisions under ambiguity and decisions under risk are differentiated. To assess decisions under ambiguity the Iowa Gambling Task (IGT) is one of the most frequently used tasks. Decisions under risk can be measured by a task that offers explicit rules for gains and losses and stable winning probabilities, as the Game of Dice Task (GDT) does. In this contribution we firstly summarize studies that investigated decision-making in various groups of patients using the IGT or the GDT. We also propose a new model of decision-making in risky situations and describe differences between decisions under ambiguity and decisions under risk from a theoretical and clinical perspective. (c) 2006 Elsevier Ltd. All rights reserved.
PERGAMON-ELSEVIER SCIENCE LTD
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1597174
eng
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.neunet.2006.03.001
info:eu-repo/semantics/altIdentifier/issn/0893-6080
info:eu-repo/semantics/altIdentifier/wos/000241758900022
info:eu-repo/semantics/altIdentifier/pmid/16942857
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1597179
2018-07-24T12:58:44Z
journal_article
doc-type:article
Divergent development of gross motor skills in children who are blind or sighted
Brambring, Michael
Brambring M. Divergent development of gross motor skills in children who are blind or sighted. <em>JOURNAL OF VISUAL IMPAIRMENT & BLINDNESS</em>. 2006;100(10):620-634.
This empirical study compared the average ages at which four congenitally blind children acquired 29 gross motor skills with age norms for sighted children. The results indicated distinct developmental delays in the acquisition of motor skills and a high degree of variability in developmental delays within and across the six subdomains that were analyzed.
AMER FOUNDATION BLIND
2006
http://purl.org/coar/resource_type/c_6501
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1597179
eng
info:eu-repo/semantics/altIdentifier/issn/0145-482X
info:eu-repo/semantics/altIdentifier/wos/000241779700013
info:eu-repo/semantics/closedAccess
oai:pub.uni-bielefeld.de:1597181
2023-07-05T11:20:36Z
conference_abstract
doc-type:other
Which cognitive mechanisms are involved in the processing of proper names?
Yen, H. -L.
Liu, H. -L.
Lee, C. -Y.
Ng, Y. -B.
Müller, Horst M. ; https://orcid.org/0000-0001-7790-3556
Yen H-L, Liu H-L, Lee C-Y, Ng Y-B, Müller HM. Which cognitive mechanisms are involved in the processing of proper names? <em>Journal of Psychophysiology</em>. 2006;20(4):335-335.
HOGREFE & HUBER PUBLISHERS
2006
http://purl.org/coar/resource_type/c_c94f
info:eu-repo/semantics/other
doc-type:other
text
https://pub.uni-bielefeld.de/record/1597181
eng
info:eu-repo/semantics/altIdentifier/issn/0269-8803
info:eu-repo/semantics/altIdentifier/wos/000241813500090
info:eu-repo/semantics/closedAccess
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