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27. Nov. 2015 · A new kind of ray. The story of X-ray crystallography begins with a professor at the University of Würzburg, Wilhelm Conrad Röntgen. As a child Röntgen did not show any notable outstanding academic ability, besides in mathematics (Simmons 2002), however he was very skilled in building mechanical contraptions, an attribute which proved particularly useful during his research career ...
Kristallstrukturanalyse. Kristallstrukturanalyse ist die Bestimmung des atomaren Aufbaus eines Kristalls durch Beugung geeigneter Strahlung am Kristallgitter . Sehr häufig wird hierfür monochromatische Röntgenstrahlung verwendet, da sie sich verhältnismäßig einfach als charakteristische Röntgenstrahlung einer Röntgenröhre erzeugen lässt.
Protein Data Bank. The Protein Data Bank ( PDB) [1] is a database for the three-dimensional structural data of large biological molecules such as proteins and nucleic acids, which is overseen by the Worldwide Protein Data Bank (wwPDB). These structural data are obtained and deposited by biologists and biochemists worldwide through the use of ...
Isomorphous replacement (IR) is historically the most common approach to solving the phase problem in X-ray crystallography studies of proteins. For protein crystals this method is conducted by soaking the crystal of a sample to be analyzed with a heavy atom solution or co-crystallization with the heavy atom. The addition of the heavy atom (or ...
There's some uncited information including. Finally, X-ray crystallography had a pioneering role in the development of supramolecular chemistry, particularly in clarifying the structures of the crown ethers and the principles of host–guest chemistry. X-ray diffraction is a very powerful tool in catalyst development.
Time resolved crystallography utilizes X-ray crystallography imaging to visualize reactions in four dimensions (x, y, z and time). This enables the studies of dynamical changes that occur in for example enzymes during their catalysis. The time dimension is incorporated by triggering the reaction of interest in the crystal prior to
X-ray reflectivity measurements are analyzed by fitting to the measured data a simulated curve calculated using the recursive Parratt's formalism combined with the rough interface formula. The fitting parameters are typically layer thicknesses, densities (from which the index of refraction n {\displaystyle n} and eventually the wavevector z component k j , z {\displaystyle k_{j,z}} is ...
