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SAT写作素材:巴斯德

2016-08-11 17:56:16来源:网络

  SAT写作最难的是手里没有素材!新东方在线SAT频道为大家整理关于巴斯德的素材,希望对大家SAT备考有所帮助。更多精彩尽请关注新东方在线SAT频道!

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  SAT写作素材:巴斯德

  Louis Pasteur was born on December 27, 1822 in Dole, in the region of Jura, France. His discovery that most infectious diseases are caused by germs, known as the "germ theory of disease", is one of the most important in medical history. His work became the foundation for the science of microbiology, and a cornerstone of modern medicine.

  Pasteur's phenomenal contributions to microbiology and medicine can be summarized as follows. First, he championed changes in hospital practices to minimize the spread of disease by microbes. Second, he discovered that weakened forms of a microbe could be used as an immunization against more virulent forms of the microbe. Third, Pasteur found that rabies was transmitted by agents so small they could not be seen under a microscope, thus revealing the world of viruses. As a result he developed techniques to vaccinate dogs against rabies, and to treat humans bitten by rabid dogs. And fourth, Pasteur developed "pasteurization", a process by which harmful microbes in perishable food products are destroyed using heat, without destroying the food.

  His Works

  Each discovery in the body of Pasteur's work represents a link in an uninterrupted chain, beginning with molecular asymmetry and ending with his rabies prophylaxis, by way of his research in fermentation, silkworm, wine and beer diseases, asepsis and vaccines.

  From Crystallography to Molecular Asymmetry

  In 1847 at the age of 26, Pasteur did his first work on molecular asymmetry, bringing together the principles of crystallography, chemistry and optics. He formulated a fundamental law: asymmetry differentiates the organic world from the mineral world. In other words, asymmetric molecules are always the product of life forces. His work became the basis of a new science --stereochemistry.

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