http://biblioteca.universia.net/html_bura/verColeccion/params/id/42620.html Mostrando recursos 1 - 14 de 14 es http://biblioteca.universia.net/img/logotipo.jpg http://biblioteca.universia.net/ http://biblioteca.universia.net/html_bura/ficha/params/title/high-resolution-study-of-002-113-11−1-four-beam-diffraction/id/56653931.html A high-resolution study of (002, 113, 11−1) four-beam diffraction in Si was performed both experimentally and theoretically. Excellent coincidence between theory and experiment was achieved. The forbidden two-beam 002 reflection was excited with the maximum reflectivity of 80%. Kohn, V. G.; Kazimirov, A. http://biblioteca.universia.net/html_bura/ficha/params/title/some-b-eq-are-more-equivalent-than-others/id/55913592.html B eq is a well defined entity that represents one property, mean-square displacement, of the anisotropic atomic displacement parameter tensor from which it is derived. B eq is not, however, the best estimate of the B factor that would result from isotropic model refinement. A new entity B est is proposed to serve this purpose. Merritt, Ethan A. http://biblioteca.universia.net/html_bura/ficha/params/title/mathematical-aspects-of-molecular-replacement-i-algebraic-properties-of-motion/id/55708894.html Search spaces in the method of molecular replacement are shown to be coset spaces of the Lie group of rigid-body motions by the chiral space group of a crystal. The resulting ‘motion space’ can be endowed with a quasigroup operation that has interesting properties which are explored here. Chirikjian, Gregory S. http://biblioteca.universia.net/html_bura/ficha/params/title/high-resolution-study-of-222-113-three-beam-diffraction-in/id/55515486.html Good agreement between the high-resolution experimental results for (222, 113) three-beam diffraction in Ge and computer simulations based on the dynamical multiple diffraction theory are presented. Kazimirov, A.; Kohn, V. G. http://biblioteca.universia.net/html_bura/ficha/params/title/the-development-of-laue-techniques-for-single-pulse-diffraction-of/id/55515485.html A modified Laue technique suitable for time-resolved diffraction is described in which profile-independent integration is used, the RATIO method is applied and multi-crystal data are normalized to a common scale. The method is applied in single-pulse pump–probe studies of a binuclear Rh complex, showing Rh—Rh bond shortening of 0.136 (8) Å on excitation. Makal, Anna; Trzop, Elzbieta; Sokolow, Jesse; Kalinowski, Jaroslaw; Benedict, Jason; Coppens, Philip http://biblioteca.universia.net/html_bura/ficha/params/title/structure-factor-analysis-of-femtosecond-microdiffraction-patterns-from-protein-nanocrystals/id/55077542.html A complete set of structure factors has been extracted from hundreds of thousands of femtosecond X-ray diffraction patterns from randomly oriented Photosystem I membrane protein nanocrystals, using the Monte Carlo method of intensity integration. The data, collected at the Linac Coherent Light Source, are compared with conventional single-crystal data collected at a synchrotron source, and the quality of each data set was found to be similar. Kirian, Richard A.; White, Thomas A.; Holton, James M.; Chapman, Henry N.; Fromme, Petra; Barty, Anton; Lomb, Lukas; Aquila, Andrew; Maia, Filipe R. N. C.; Martin, Andrew V.; Fromme, Raimund; Wang, Xiaoyu; Hunter, Mark S.; Schmidt, Kevin E.; Spence, John C. H. http://biblioteca.universia.net/html_bura/ficha/params/title/exact-direct-space-asymmetric-units-for-the-230-crystallographic-space/id/54031967.html A reference table of exact direct-space asymmetric units for the 230 crystallographic space groups is presented, based on a new geometric notation for asymmetric unit conditions. Grosse-Kunstleve, Ralf W.; Wong, Buddy; Mustyakimov, Marat; Adams, Paul D. http://biblioteca.universia.net/html_bura/ficha/params/title/translation-calibration-of-inverse-kappa-goniometers-in-macromolecular-crystallography/id/54031966.html A rapid, easy-to-perform translation calibration procedure has been developed for use with the EMBL/ESRF mini-κ goniometer head and for other inverse-kappa goniometers designed for macromolecular crystallography. Regular calibration ensures the precision of experiments that rely on many degrees of freedom in crystal reorientation. Brockhauser, Sandor; White, Kristopher I.; McCarthy, Andrew A.; Ravelli, Raimond B. G. http://biblioteca.universia.net/html_bura/ficha/params/title/geometric-properties-of-nucleic-acids-with-potential-for-autobuilding/id/53963297.html Algorithms and geometrical properties are described for the automated building of nucleic acids in experimental electron density. Gruene, Tim; Sheldrick, George M. http://biblioteca.universia.net/html_bura/ficha/params/title/high-resolution-study-of-dynamical-diffraction-phenomena-accompanying-the-renninger/id/53782124.html The effect of the total reflection of the incident beam into the 222 reflected beam in the Renninger (222/113) case in Si was experimentally observed by using a highly monochromatic beam with high angular collimation in both the vertical and horizontal planes. Kazimirov, A.; Kohn, V. G. http://biblioteca.universia.net/html_bura/ficha/params/title/time-resolved-structural-studies-of-protein-reaction-dynamics-smorgasbord-of/id/53566021.html Time-resolved structural studies of proteins have undergone several significant developments during the last decade. Recent developments using time-resolved X-ray methods, such as time-resolved Laue diffraction, low-temperature intermediate trapping, time-resolved wide-angle X-ray scattering and time-resolved X-ray absorption spectroscopy, are reviewed. Westenhoff, Sebastian; Nazarenko, Elena; Malmerberg, Erik; Davidsson, Jan; Katona, Gergely; Neutze, Richard http://biblioteca.universia.net/html_bura/ficha/params/title/five-dimensional-crystallography/id/53566019.html Here it is demonstrated how five-dimensional crystallography can be used to determine a comprehensive chemical kinetic mechanism in concert with the atomic structures of transient intermediates that form and decay during the course of the reaction. Schmidt, Marius; Graber, Tim; Henning, Robert; Srajer, Vukica http://biblioteca.universia.net/html_bura/ficha/params/title/time-resolved-synchrotron-diffraction-and-theoretical-studies-of-very-short/id/53566013.html Excited-state geometries determined by time-resolved synchrotron diffraction are summarized with emphasis on their comparison with a series of theoretical results. The relative merits of monochromatic and polychromatic (Laue) techniques are discussed. Coppens, Philip; Benedict, Jason; Messerschmidt, Marc; Novozhilova, Irina; Graber, Tim; Chen, Yu-Sheng; Vorontsov, Ivan; Scheins, Stephan; Zheng, Shao-Liang http://biblioteca.universia.net/html_bura/ficha/params/title/depth-profiling-of-polymer-films-with-grazing-incidence-small-angle/id/53429401.html A procedure for obtaining depth-specific scattering profiles of laterally defined nanostructure using grazing-incidence small-angle X-ray scattering is described. Singh, Marsha A.; Groves, Michael N.