Word: notatum
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Dates: during 1940-1949
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...discovery of penicillin (almost by accident) in 1928 was a conspicuous breakthrough. Britain's Dr. Alexander Fleming noticed that the mold Penicillium notatum secretes a substance that kills certain bacteria growing on culture dishes. Later it was found that the secretion also kills many disease-producing organisms in the human body. It also does its job without any appreciable damage to human tissues. Fleming's great discovery focused attention on the fact that some micro-organisms are powerful chemical weapons that can be used against other disease-causing microorganisms...
...spite of such failings, gramicidin touched off a chain reaction. Dubos announced its discovery in 1939. A group of British researchers heard about it and recalled Alexander Fleming's Penicillium notatum. The substance it secreted is penicillin. Ripples of excitement spread through the world's biological laboratories...
...blue-green mold, Penicillium notatum, which excretes penicillin, has a laboratory rival. Last week a biochemical team led by Dr. Vincent du Vigneaud of the New York Hospital-Cornell Medical...
...university and Government researchers have isolated over 200,000 varieties. Useful microbes may turn up anywhere-in the air, on the water, on forest leaf mold, in city garbage cans. A potent industrial bacillus was discovered in the intestines of a grasshopper. The best strain of the mold Penicillium notatum, which makes life-saving penicillin, was first noticed on a cantaloupe rind...
...first, penicillin was produced only in small flasks (relatively easy to protect against contamination) from a strain of the mold, Penicillium notatum. In Dr. Coghill's laboratory, mycologists developed new, heavier-yielding strains. They also found that the mold's growth could be greatly speeded in a brew of lactose made from skimmed milk and steep liquor made from corn...