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John R. Helliwell
John R. Helliwell (born 1953, Wickersley, Yorkshire) is a British crystallography, crystallographer known for his pioneering work in the use of synchrotron radiation in X-ray crystallography#Biological macromolecular crystallography, macromolecular crystallography. Education and career He studied physics at the University of York and obtained a PhD from the University of Oxford in 1978. For many years he was closely associated with the Synchrotron Radiation Source at Daresbury Laboratory, while also holding positions at the University of Keele, the University of York and the University of Manchester, where he is now an Emeritus Professor. Awards and honours In 2014 the American Crystallographic Association awarded Helliwell the A. L. Patterson Award for `his pioneering contributions to the development of the instrumentation, methods and applications of synchrotron radiation in macromolecular crystallography', and in 2015 he was awarded the Max Perutz Prize by the European Crystall ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crystallography
Crystallography is the experimental science of determining the arrangement of atoms in crystalline solids. Crystallography is a fundamental subject in the fields of materials science and solid-state physics (condensed matter physics). The word "crystallography" is derived from the Greek word κρύσταλλος (''krystallos'') "clear ice, rock-crystal", with its meaning extending to all solids with some degree of transparency, and γράφειν (''graphein'') "to write". In July 2012, the United Nations recognised the importance of the science of crystallography by proclaiming that 2014 would be the International Year of Crystallography. denote a direction vector (in real space). * Coordinates in ''angle brackets'' or ''chevrons'' such as <100> denote a ''family'' of directions which are related by symmetry operations. In the cubic crystal system for example, would mean 00 10 01/nowiki> or the negative of any of those directions. * Miller indices in ''parentheses'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
