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Florence Ogilvy Bell (1 May 1913 – 23 November 2000 [3] ), later Florence Sawyer, was a British scientist who contributed to the discovery of the structure of DNA. She was an X-ray crystallographer in the lab of William Astbury. In 1938 they published a paper in Nature that described the structure of DNA as a "Pile of Pennies".
La cristallografia a raggi X è una tecnica della cristallografia in cui l'immagine, prodotta dalla diffrazione dei raggi X attraverso lo spazio del reticolo atomico in un cristallo, viene registrata e quindi analizzata per rivelare la natura del reticolo. In genere, questo porta a determinare il materiale e la struttura molecolare di una sostanza.
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 ...
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.
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.
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 ...
Single-wavelength anomalous diffraction. Single-wavelength anomalous diffraction (SAD) is a technique used in X-ray crystallography that facilitates the determination of the structure of proteins or other biological macromolecules by allowing the solution of the phase problem. In contrast to multi-wavelength anomalous diffraction (MAD), SAD ...
