Search Results - (Author, Cooperation:A. Souvorov)
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1Latest Papers from Table of Contents or Articles in PressJ. K. Colbourne ; M. E. Pfrender ; D. Gilbert ; W. K. Thomas ; A. Tucker ; T. H. Oakley ; S. Tokishita ; A. Aerts ; G. J. Arnold ; M. K. Basu ; D. J. Bauer ; C. E. Caceres ; L. Carmel ; C. Casola ; J. H. Choi ; J. C. Detter ; Q. Dong ; S. Dusheyko ; B. D. Eads ; T. Frohlich ; K. A. Geiler-Samerotte ; D. Gerlach ; P. Hatcher ; S. Jogdeo ; J. Krijgsveld ; E. V. Kriventseva ; D. Kultz ; C. Laforsch ; E. Lindquist ; J. Lopez ; J. R. Manak ; J. Muller ; J. Pangilinan ; R. P. Patwardhan ; S. Pitluck ; E. J. Pritham ; A. Rechtsteiner ; M. Rho ; I. B. Rogozin ; O. Sakarya ; A. Salamov ; S. Schaack ; H. Shapiro ; Y. Shiga ; C. Skalitzky ; Z. Smith ; A. Souvorov ; W. Sung ; Z. Tang ; D. Tsuchiya ; H. Tu ; H. Vos ; M. Wang ; Y. I. Wolf ; H. Yamagata ; T. Yamada ; Y. Ye ; J. R. Shaw ; J. Andrews ; T. J. Crease ; H. Tang ; S. M. Lucas ; H. M. Robertson ; P. Bork ; E. V. Koonin ; E. M. Zdobnov ; I. V. Grigoriev ; M. Lynch ; J. L. Boore
American Association for the Advancement of Science (AAAS)
Published 2011Staff ViewPublication Date: 2011-02-05Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyComputer ScienceMedicineNatural Sciences in GeneralPhysicsKeywords: Adaptation, Physiological ; Amino Acid Sequence ; Animals ; Base Sequence ; Chromosome Mapping ; Daphnia/*genetics/physiology ; *Ecosystem ; Environment ; Evolution, Molecular ; Gene Conversion ; Gene Duplication ; Gene Expression ; Gene Expression Profiling ; Gene Expression Regulation ; Genes ; Genes, Duplicate ; *Genome ; Metabolic Networks and Pathways/genetics ; Molecular Sequence Annotation ; Molecular Sequence Data ; Multigene Family ; Phylogeny ; Sequence Analysis, DNAPublished by: -
2Articles: DFG German National LicensesStaff View
ISSN: 1089-7623Source: AIP Digital ArchiveTopics: PhysicsElectrical Engineering, Measurement and Control TechnologyNotes: The stability and reproducibility of positioning of the fixed exit double crystal monochromator are the crucial points at the modern synchrotron beamlines dealt with the high resolution imaging techniques and microscopy at high energies. Due to high heat load, the monochromator crystals must be cryogenically cooled. The cooling loop of the second crystal impact the performance of the monochromator. We suggest the use of the silicon-germanium (Si1−xGex) bulk crystal as the first cooled crystal of the monochromator. The second crystal in that case is held at room temperature. © 1997 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
3Articles: DFG German National LicensesSouvorov, A. ; Snigireva, I. ; Snigirev, A.
Woodbury, NY : American Institute of Physics (AIP)
Published 1997Staff ViewISSN: 1077-3118Source: AIP Digital ArchiveTopics: PhysicsNotes: An increment of the x-ray flux in crystal Bragg–Fresnel lens (BFL) focus in backscattering geometry obtained by means of acoustic excitation of the BFL crystal substrate has been investigated. The dependence of the x ray's total reflected power versus ultrasound parameters has been studied in a low frequency range (10–50 MHz). The proposed technique allows an increase in the flux in a BFL focus by a factor of 2 which almost achieves the kinematic limit. © 1997 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
4Articles: DFG German National LicensesSouvorov, A. ; Snigirev, A. ; Snigireva, I. ; Aristova, E.
[S.l.] : American Institute of Physics (AIP)
Published 1996Staff ViewISSN: 1089-7623Source: AIP Digital ArchiveTopics: PhysicsElectrical Engineering, Measurement and Control TechnologyNotes: We have investigated the feasibility of widening the bandpath of the Bragg–Fresnel optical element through the use of ion implantation. The focusing properties of Bragg–Fresnel lenses (BFLs) were studied as a function of the implantation dose and energy. An enhancement of the focus intensity of up to 15% was found, which is less than expected. Due to the complicated scattering of the low energy ions inside the micrometer- and submicrometer-sized crystal features that make up the BFL relief, the implantation technology destroys the peripheral zones of the BFL more than it increases the intensity in the focus. Nevertheless we believe that high energy implantation can be successfully used to modify the BFL reflectivity, especially in the case of nearly backscattering reflection. © 1996 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
5Articles: DFG German National LicensesRaven, C. ; Snigirev, A. ; Snigireva, I. ; Spanne, P. ; Souvorov, A. ; Kohn, V.
Woodbury, NY : American Institute of Physics (AIP)
Published 1996Staff ViewISSN: 1077-3118Source: AIP Digital ArchiveTopics: PhysicsNotes: Cross-sectional information on low electron density materials can be obtained by probing a sample with a 60 keV coherent synchrotron x-ray beam in an in-line holography setup. Such objects are practically transparent to high energy x rays and create a phase shift of the wave front only. Images of a 100 μm diameter boron fiber were recorded in the extreme near field region, where contrast occurs only at interfaces between regions with different decrements of refractive index. Theoretical simulations are in good agreement with the measured intensities. In a tomographic reconstruction the 15 μm diameter core of the fiber is clearly visible, demonstrating the possibility of reconstructing three dimensional interfaces between low density materials. © 1996 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
6Articles: DFG German National LicensesHu, Z. W. ; Thomas, P. A. ; Snigirev, A. ; Snigireva, I. ; Souvorov, A. ; Smith, P. G. R. ; Ross, G. W. ; Teat, S.
[s.l.] : Macmillan Magazines Ltd.
Published 1998Staff ViewISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] Nature 392, 690–693 (1998) The labels for Fig. 2b and c should be ...Type of Medium: Electronic ResourceURL: -
7Articles: DFG German National LicensesHu, Z. H. ; Snigirev, A. ; Snigireva, I. ; Souvorov, A ; Smith, P. G. R. ; Ross, G. W. ; Teat, S. ; Thomas, P. A.
[s.l.] : Macmillan Magazines Ltd.
Published 1998Staff ViewISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] A varying refractive index across a wavefront leads to a change in the direction of propagation of the wave,. This provides the basis for phase-contrast imaging of transparent or weakly absorbing materials with highly coherent X-ray beams,. Lattice distortions can also change the direction of ...Type of Medium: Electronic ResourceURL: