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Back Cover (Phys. Status Solidi A 12/2010)
Author(s) -
Fan Haifu
Publication year - 2010
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201090027
Subject(s) - cover (algebra) , diffraction , beijing , crystallography , electron diffraction , electron density , direct methods , crystal structure , materials science , physics , chemistry , electron , optics , engineering , geography , quantum mechanics , mechanical engineering , archaeology , china
Direct methods in crystallography derive diffraction phases directly from experimentally measured diffraction amplitudes. This is why they have played the central role in diffraction analysis of solving crystal structures. In 1987, Haifu Fan suggested that direct methods should turn to exploring new applications outside their traditional field. For this purpose, there are four ways to go: (i) from single crystals to powder samples, (ii) from X‐ray crystallography to electron microscopy, (iii) from periodic structures to incommensurate structures, and (iv) from small molecules to macromolecular structures. In his Review Article on pp. 2621–2638 , Haifu Fan focuses on works belonging to the last three categories done at the Institute of Physics in Beijing. The cover image shows partial electron‐density maps of the protein TT0570 at different resolutions with the final structure model superimposed. Phases corresponding to each set of truncated data were derived separately and improved by density modification.