نتایج جستجو برای: x ray crystallography

تعداد نتایج: 669246  

Journal: :American Journal of Physics 2017

Journal: :Journal of Synthetic Organic Chemistry, Japan 1966

2011
Jianwei Miao Pambos Charalambous Janos Kirz David Sayre

Since the emergence of powerful X-ray sources such as synchrotron radiation, the area of X-ray structure determination gradually evolved into two fields. The relatively small one is X-ray Microscopy which employs X-ray lenses such as zone plates, compound refractive lenses, curved mirrors and glass capillaries to focus X-rays to determine the structures of non-crystalline specimens. The resolut...

Reactions of equemolar amounts of lead (II) nitrate and 2,2'- bipyridine o r l , 10- phenanthroline in aqueous methanolicsolution yield crystals of Pb (bipy)(H O)(NO ) (1) or Pb (phen) (H O) (NO ) (2) respectively. Their structures were determined by X-ray crystallography. The method and structure determination is described

Journal: :Science 2015
Jianwei Miao Tetsuya Ishikawa Ian K Robinson Margaret M Murnane

X-ray crystallography has been central to the development of many fields of science over the past century. It has now matured to a point that as long as good-quality crystals are available, their atomic structure can be routinely determined in three dimensions. However, many samples in physics, chemistry, materials science, nanoscience, geology, and biology are noncrystalline, and thus their th...

2008
Simeon Andrews Steve L. Reichow Tamir Gonen

Aquaporins are a family of ubiquitous membrane proteins that form a pore for the permeation of water. Both electron and X-ray crystallography played major roles in determining the atomic structures of a number of aquaporins. This review focuses on electron crystallography, and its contribution to the field of aquaporin biology. We briefly discuss electron crystallography and the two-dimensional...

Journal: :Acta crystallographica. Section D, Biological crystallography 2011
Albane le Maire Muriel Gelin Sylvie Pochet François Hoh Michel Pirocchi Jean François Guichou Jean Luc Ferrer Gilles Labesse

X-ray crystallography is now a recognized technique for ligand screening, especially for fragment-based drug design. However, protein crystal handling is still tedious and limits further automation. An alternative method for the solution of crystal structures of proteins in complex with small ligands is proposed. Crystallization drops are directly exposed to an X-ray beam after cocrystallizatio...

2015
Matthew P. Blakeley Samar S. Hasnain Svetlana V. Antonyuk

The International Year of Crystallography saw the number of macromolecular structures deposited in the Protein Data Bank cross the 100000 mark, with more than 90000 of these provided by X-ray crystallography. The number of X-ray structures determined to sub-atomic resolution (i.e. ≤1 Å) has passed 600 and this is likely to continue to grow rapidly with diffraction-limited synchrotron radiation ...

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