Word: gallium
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...negative charge)-an electrical current applied to this junction will flow in only one direction: from the N side to the P side, much the same as the oneway current flow in old-fashioned radio vacuum tubes called diodes. Even more significant, certain semiconductors, notably those made of gallium phosphide and gallium arsenide phosphide, will glow with a bright red light when current is flowing through them...
Bone to Blood. Current interest is focused on two isotopes of indium and gallium. At Ohio State University, Radiologists William W. Hunter Jr. and Xavier J. Riccobono worked with indium Ill, which was produced in the campus cyclotron. Using a special scanner, they found that the radioisotope concentrated heavily in bone in the first 24 hours after intravenous injection. As a result, X-ray photographs taken after the first day tended to reveal bone cancer. Even better, the radioactive molecules then joined proteins in the blood, concentrating in young, fast-growing tumors, thus revealing the sites of other cancers...
...front runner among today's diagnostic radioisotopes is gallium 67. Like indium, it can be virtually hand-crafted any time in any cyclotron. It, too, has a half-life of approximately three days-just right for selective concentration in a series of body tissues...
...captain of the squash team, is studying ways to reduce underwater boundary-layer drag on submarines, for example. Others are pondering modern Argentine history, the future use of lasers in naval gunnery, the effect of radiation on transistors, the accuracy of navigational methods, and a potential heteropoly acid combining gallium and tungsten. The young scholars range far off base, from the Bell Telephone labs to a nuclear sub cruise...
...Mount Wachusett, a modest peak (alt. 2,006 ft.) 34 miles from Lincoln Lab. The first long-distance experiments were not successful, mostly because of hastily assembled equipment. After many months of work, an improved transmitter pointed at Lincoln Laboratory from Mount Wachusett. The tiny gallium arsenide diode, only 0.01 in. in diameter, was placed precisely at the focus of a 5-in. reflecting telescope that concentrated its infra-red light into a tight bundle. On the roof of the lab, the researchers set up their receiver-the reflector of a 5-ft. war-surplus searchlight with a sensitive photocell...