新GRE写作名人素材库：巴斯德_GRE写作

新GRE写作名人素材库：巴斯德

　　Pasteur was elated. He repeated his experiment under the exacting eyes of Jacques Biot, the French Academy s authority on polarized light who had brought Eilhardt Mitscherlich s work to Pasteur s attention. The confirmation was complete to the last exacting detail, and Pasteur, then 26, became famous. The French government made him a member of the Legion of Honor, and Britain s Royal Society presented him with the Copley Medal.

　　In 1852 Pasteur accepted the chair of chemistry at the University of Strasbourg. Here he found an opportunity to pursue another dimension of crystallography. It had long been known that molds grew readily in solutions of calcium paratartrate. It occurred to him to inquire whether organisms would show a preference for one isomer or another. He soon discovered that his microorganism could completely remove only one of the crystal forms from the solution, the levorotary, or left-handed, molecule.

　　In 1854, though only 31 years old, Pasteur became professor of chemistry and dean of sciences at the new University of Lille. The course of his activities is displayed in the publications which he gave to the world in the next decades: Studies on Wine , Studies on Vinegar , Studies on the Diseases of Silkworms , and Studies on Beer .

　　Soon after his arrival at Lille, Pasteur was asked to devote some time to the problems of the local industries. A producer of vinegar from beet juice requested Pasteur s help in determining why the product sometimes spoiled. Pasteur collected samples of the fermenting juices and examined them microscopically. He noticed that the juices contained yeast. He also noted that the contaminant, amyl alcohol, was an optically active compound, and hence to Pasteur evidence that it was produced by a living organism .