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Project title Explain how Penicilin helps fight bacteria
Difficulty Level Middle school
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Description
Antibiotics are chemicals, effective at very low concentrations, created as part of the life process of one organism, which can kill or stop the growth of a disease-causing microbe--a germ. In 1929, Alexander Fleming, a doctor and researcher at St. Mary's Hospital in London, England, published a paper on a chemical he called "penicillin", which he had isolated from from a mold, Penicillium notatum. Penicillin, Fleming wrote, had prevented the growth of a neighboring colony of germs in the same petri dish. Dr. Fleming was never able to purify his samples of penicillin, but he became the first person to publish the news of its germ-killing power. Howard Florey, Ernst Chain and Norman Heatley expanded on Fleming's work in 1938, at Oxford University. They and their staff developed methods for growing, extracting and purifying enough penicillin to prove its value as a drug. 
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