Word: acidity
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Dates: during 1940-1949
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...became an ardent photographer. At night, when his trusting father thought he was studying, Leo was busy in his darkroom. When he tried out the indelible properties of silver nitrate on a schoolmate's face, the other boy got panicky and went to a doctor, who suggested hydrochloric acid as a remover. The results were painful. Haled before a school board, Baekeland put some silver nitrate on his own skin, quickly and harmlessly removed it with another chemical...
They minced the virus-choked lungs of mice infected with flu, made a brew so powerful that it killed healthy mice even if diluted a million times. But when a suspension of virus was mixed with equal amounts of hand-soap or a fatty acid solution, allowed to stand for 90 minutes, and injected into scores of normal mice, none of them came down with flu. In fact, said the scientists, once vaccinated, the mice easily withstood huge doses of straight virus...
...stainless steel, foundry engineers had to tax their wits to meet the technical requirements. Into nine synthetic sand molds made from the plaster model, ten tons of molten stainless steel (temperature 3,000° F.) were poured. When the steel had cooled, four hundred gallons of ammonia and nitric acid, 3,000 gallons of boiling water, were sloshed over its surface to shine it. Said William H. Eisenman, secretary of the American Society for Metals: "It is easily the outstanding achievement of the decade in American foundry practice, probably an all-time high...
...Supercharger." Glycogen, a form of starch manufactured in the liver, is the substance which the body uses for quick energy. When glycogen is consumed, lactic acid is produced-mostly a waste product since a good part of it breaks down into carbon dioxide and water. But some lactic acid is reconverted into glycogen, which is then available for further energy release. Last week Dr. George Bogdan Kistiakowsky and five co-workers of Harvard compared this operation to that of a gasoline engine supercharger, which uses the energy of exhaust gases to pump air at high pressure into the firing cylinders...
Lyford, who had spilt acid on a pair of chemistry work pants, rebelled in his own way and threw the pants on the shower floor with the water turned on full. Summoned away from his impromptu washtub by some errand. he was absent for about a quarter of an hour and returned to find langorous waves breaking slowly over the far edge...