Word: gallium
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Dates: during 1980-1980
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...included physiological and biological stress tests, notably monitoring the skeletal changes that occur during prolonged exposure to weightlessness. The cosmonauts made extensive surveys of the earth, looking for oil deposits, checking crops and forests, and seeking untapped sources of fresh water. They cultured yeast cells and grew layers of gallium arsenide crystals, an important component of computer chips and lasers. The objective: to test the zero g environment for possible use in future space manufacturing facilities...