Word: gallium
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...breakthrough had come as Physicist Robert J. Keyes checked on the properties of a gallium arsenide diode developed by Lincoln Lab Engineer Theodore M. Quist. A less-than-gnat-sized electronic device that generates pure infra-red light when a small direct current is passed through it, the diode turned out to have an extraordinary property: the intensity of the normally invisible infra-red beam could be easily controlled by varying the strength of the current that generates it. Keyes speculated that if his little light beam was visible at any distance, it could be modulated to carry the human...
...they also affect the marrow and damage the blood-making cells. At Oak Ridge, doctors and radiologists have just eliminated gallium7 2 as unsuitable for treatment, largely because it takes too long to settle in the bone (and meanwhile loses most of its radioactivity). Next on their list is gallium...
...tiny high pressure laboratory, Professor Bridgman has produced forms of bismuth, gallium, calcium, strontium, barium, and cesium which have never been seen before. As in the case of red and yellow forms of sulfur that are seen under ordinary pressures, he has made forms of these elements that differ from their usual forms in appearance and in physical properties...