Word: ultraviolet
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Dates: during 1930-1939
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...display explains the uses of X-ray and surface photography, and of ultraviolet and infra-red light, in the determination of the authorship of paintings, the study of painting styles, the detection of forgery, and the restoration of damaged pictures. The University now has X-ray films available for study of more than 3,200 paintings in the United States and Europe...
...prevention of rickets in children, Vitamin D regulates the amount of calcium and phosphorus which the body uses for building bones and teeth. Only vitamin which does not originate in plant tissue, vitamin D occurs most abundantly in oily fish livers, is generated in the body by ultraviolet rays of the sun. Normal U. S. adults get all the vitamin D they need when they bask on beaches, and, if they drink plenty of milk, need not worry about calcium regulation. But to make best use of the calcium in their diet, pregnant women and children need extra amounts, must...
...weeks under expensive cold-storage conditions. In the Mellon-Kroger process it is done in a few days at a temperature of 60°, a relative humidity of 90%. Molds and bacteria, which would spoil such warm, damp meat if left to themselves, are put out of action by ultraviolet light from a Westinghouse lamp...
...British journal Nature fortnight ago, Dr. Svedberg reported experiments on molecules of hemocyanin (molecular weight, 6,740,000 units), a blue pigment from the blood of mollusks. He and his co-workers at the University of Upsala bombarded the hemocyanin particles with quanta of energy in the form of ultraviolet light. Certain wave lengths of the bombarding radiation split the blood pigment molecules into halves. This was like splitting inorganic atoms in a high-voltage atom-smasher...
...obvious, Dr. Perry was not convinced that it was a case of cause and effect. Perhaps, he reasoned, the radiation first altered some factor in the diet, which then stimulated the pituitary and through it the sex mechanism. With this hypothesis in mind. Perry irradiated whole-wheat grains with ultraviolet light, fed them to his birds. That did the trick, whereas the sex glands of other birds which received the same (normal) illumination, but did not eat the irradiated, aphrodisiac wheat, remained in the "resting condition...