Word: urea
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Dates: during 1950-1959
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...James Shaw's report that urea is an effective anti-decay agent [Jan. 13] comes as no surprise to those acquainted with the Roman poet Catullus [84-54 B.C.], who, in poems 37 and 39, lashes out at a Spaniard who aspires to be the lover of Catullus' girl and accuses him of keeping his teeth white by rubbing them with urine...
...Penicillin and chlortetracycline (Aureomycin) are effective anti-decay agents, as are urea and dibasic ammonium carbonate; other antibiotics and chemicals tested (among them, many of those now commonly blended into toothpastes) do little or no good...
Working in their separate ways, 3,000 miles apart, the two researchers tackled some of the most complex and fundamental problems in the biological processes by which food is converted into energy. Krebs had already shown that urea, the end product of nitrogen metabolism, is formed through a cycle of chemical reactions in the liver. Soon he was delving into a still more important cycle, by which products of sugar and fatty acids are broken down into a group of chemicals including pyruvic acid. This acid is oxidized or "burned" to form a go-between chemical now known as acetyl...
...improve the steer so that there will be more meat, less waste, less expense in raising it. Some experts also believe that even the traditional feed-lot method of fattening cattle with expensive corn can be greatly improved. One development in feeding is the use of synthetic urea to nourish the bacteria in the rumen (part of a steer's stomach) so that a steer can be readied for market on cotton burrs, corncobs and even sawdust in its food...
...Irritated by hucksters' exaggerated claims for tooth powders and pastes containing "antienzymatic agents, chlorophyll, ammonia and urea," as well as antibiotics, the Journal of the American Dental Association said editorially: "Many of these . . . superclaims are on the same low level as those made for discredited cancer cures and arthritis remedies...