Word: hickman
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Dates: during 1930-1939
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...Harvard cyclotron was planned and constructed by a group composed of Kenneth T. Bainbridge, associate professor of Physics; Jabez C. Street, associate professor of Physics; Roger W. Hickman, lecturer in Physics and Engineering; and John J. Livingood, instructor in Physics, working under the Committee on Nuclear Physics, of which Harry R. Mimno, associate professor of Physics, in chairman...
...Kenneth Claude Devereux Hickman is a suave, sociable British chemist who works for the Eastman Kodak laboratories in Rochester. N. Y. His specialty is the efficient recovery of vitamins from fish oils by a clever technique of distillation...
Mechanical pumps have a certain limit beyond which they cannot decrease the vacuum chamber pressure any further. So Dr. Hickman has designed a sort of chemical pump which goes to work after the mechanical pump has done its best. A spray of oil vapor is shot in one side of the chamber, out the other. Some of the gas molecules roaming inside are struck by the oil particles, adhere to them, are thus escorted outside through the oil vapor exit...
...development of new stills resulted not only in a new method of obtaining vitamins, but in the discovery that vitamins previously recognized as individuals were in fact whole tribes of near relations. Distiller Hickman found that as temperature increased, the distillation rate of each vitamin changed and each had its characteristic peak. By this means he established that different fishes manufacture different kinds of Vitamin D. Vitamin D obtained from bluefin tuna did not resemble, in distillation behavior, the vitamin from white sea bass. Cod-liver oil was found to contain two major Vitamin Ds and some minor ones, making...
Another discovery was a sort of dummy Vitamin A, having a typical vitamin structure but no biological activity. This was labeled "Spurious A." Distilled Vitamin A esters are entirely free of this masquerader. They are also, said Dr. Hickman. "particularly stable to heat or oxidation. They are recommended especially for incorporation into fats and other foods, into chocolate, and into capsules for medicinal use. Distilled A capsules do not cause the unpleasant repeating or aftertaste associated with crude fish oils...