Word: urea
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...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...
...fact that Greenewalt married the boss's daughter did not hurt him at Du Pont, but he still had to make his own way. He became an expert in high-pressure synthesis, a new field which opened the door to all kinds of chemical processes, (e.g., urea, long-chain alcohols), won 18 patents, most of them used by Du Pont. It was Greenewalt's work on nylon-the biggest treasure yet turned up in Du Pont test tubes-which put him far up on the skimmer chart. Du Pont's brilliant scientist, Dr. Wallace Carothers, first materialized...
What made the industry jumpy was the sudden growth of the ammoniated tooth cleansers-and the skyrocketing sales of a newcomer in the big dental field. Amm-i-Dent, the first widely distributed tooth powder to include carbamide (urea) and dibasic ammonium phosphate (TIME, Feb. 14), had climbed, so its makers claimed, to fourth place in sales among all U.S. dentifrices, surpassed only by Colgate, Ipana and Pepsodent. Amm-i-Dent, a dentifrice supposed to head off tooth decay, had indisputably set the trade's teeth on edge...
Last fall, a field man reported to President Melvin that several dentists in his territory were excited over ammoniated dentifrices. Researchers at the University of Illinois and at Manhattan's Sydenham Hospital, testing the use of urea and dibasic ammonium phosphate to kill bacteria associated with tooth decay, had reported promising results...
Last week a nonprofit group called the Eastern Graduate Research Foundation announced a new campaign against Lactobacillus and a three-year program to test it. The new weapon is a tooth powder containing dibasic ammonium phosphate and urea (a synthetic nitrogen compound). The powder is supposed to break down tooth film, slow down growth of bacteria and neutralize the acid created by Lactobacillus. In preliminary experiments, the foundation claims, it has reduced decay as much...