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Download A Dictionary of Scientists (Oxford Paperback Reference) by John Daintith, Derek Gjertsen PDF

By John Daintith, Derek Gjertsen

For scientists of every age it is a nice booklet with concise descriptions of 100's of scientists from the Greeks onwards. a quick description in their kinfolk historical past, while born and died is by means of all you must be aware of, approximately their major clinical endeavors. There are few noticeable omissions yet i have to carry to activity the editors for now not directory might be the best British chemist of the 19th century - Sir Joseph Wilson Swan (inventor of the electrical mild bulb; sleek photographic paper and the creation of polymeric fibres).

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He himself trained in law and medicine and later served as qadi or judge in Seville and Cordoba. In 1182 he was appointed physician to the court of caliph Abu Ya'qub Ynsuf in Marrakesh and to his son, Abu Yusuf Ya'qub, in 1195 but was recalled shortly before his death. In the field of medicine Averroës produced his Kulliyat fi al tib (General Medicine) between 1162 and 1169. He is however better known for his great commentaries on Aristotle but, above all, for his Taha fut al-Talasifah (The incoherence of the Incoherence), a strong attack on the Muslim philosopher al-Ghazzali's Tahafut al-Falasifah (The Incoherence of the Philosophers).

The molecule of ribonuclease a globular protein consists of one chain twisted into a ball and held together by four disulfide bridges. e. it becomes denatured. Once the bridges are broken they can be reunited in any one of 105 different ways, Anfinsen found that the minimum of chemical intervention merely putting the enzyme into a favorable environment was sufficient to induce the ribonuclease to adopt the one configuration that restores enzymatic activity. The important conclusion Anfinsen drew from this observation was that all the information for the assembly of the threedimensional protein must be contained in the protein's sequence of amino acids its primary structure.

In this work he also reported the wavelengths of some 1000 Fraunhofer lines measured to six significant figures in units of 10-8 centimeter. < previous page page_14 next page > < previous page page_15 next page > Page 15 Since 1905 his name has been officially honored as a unit of length used by spectroscopists and microscopists; 1 Ångstrom = 10-8 cm. His map of the Normal Solar Spectrum (1869) became a standard reference for some 20 years. Ångstrom was also the first to examine the spectrum of the aurora borealis and to measure the characteristic bright yellow-green light sometimes named for him.

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