Large Displacement Motions
Mostrando 1-6 de 6 artigos, teses e dissertações.
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1. FUNCTIONALLY GRADED MATERIALS ON THE DYNAMIC BEHAVIOR OF FLEXIBLE RISERS / MATERIAIS COM GRADAÇÃO FUNCIONAL NO COMPORTAMENTO DINÂMICO DE LINHAS FLEXÍVEIS
Neste trabalho um novo elemento de viga co-rotacionado é apresentado para a análise não-linear geométrica tridimensional, estática e dinâmica, de linhas marítimas de Materiais com Gradação Funcional (MGF). Assume-se que o módulo de elasticidade e a massa específica do material da viga variam ao longo da espessura da seção transversal tubular de
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 07/12/2011
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2. Structural dynamics of human deoxyhemoglobin and hemochrome investigated by nuclear gamma resonance absorption (Mössbauer) spectroscopy.
Mössbauer spectra of human deoxyhemoglobin and hemochrome frozen solutions, selectively enriched with 57Fe in either the alpha chains or the beta chains, were measured from 4.2 to 250 K. The Lamb-Mössbauer factor, ln f = 4II2 [x2]gamma/lambda 2, was calculated from these spectra and gives the structural dynamics of the iron atom (heme). Large differences i
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3. SURVEY AND SUMMARY: The morph server: a standardized system for analyzing and visualizing macromolecular motions in a database framework
The number of solved structures of macromolecules that have the same fold and thus exhibit some degree of conformational variability is rapidly increasing. It is consequently advantageous to develop a standardized terminology for describing this variability and automated systems for processing protein structures in different conformations. We have developed
Oxford University Press.
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4. Computer simulations of the OmpF porin from the outer membrane of Escherichia coli.
Molecular dynamics simulations were used to study the structure and dynamics of the Escherichia coli OmpF porin, which is composed of three identical 16-stranded beta-barrels. Simulations of the full trimer in the absence of water and the membrane led to significant contraction of the channel in the interior of each beta-barrel. With very weak harmonic const
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5. Conformational substates in a protein: structure and dynamics of metmyoglobin at 80 K.
The crystal structure of sperm whale metmyoglobin has been determined at 80 K to a resolution of 2A. The overall structure at 80 K is similar to that at 300 K except that the volume is smaller. Refinement of the structure by the method of restrained least squares (current R = 0.175) permits the assignment of isotropic atomic mean-square displacements to all
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6. Dynamics of heme iron in crystals of metmyoglobin and deoxymyoglobin.
The 57Fe gamma-ray resonance absorption spectra have been measured in crystals of metmyoglobin and deoxymyoglobin over a wide range of temperatures. Above a critical temperature common to both proteins (220 K), the dynamics of heme iron display a dramatic change, in that two kinds of thermal fluctuations come into play--a fast fluctuation associated with a s