Word: strontium
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Dates: during 1960-1969
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...made salts (alginates) with a wide variety of medicinal properties. Some help tablets to disintegrate more rapidly in the stomach. Others form the basis of anti-clotting drugs and of preparations to control surface bleeding. Sodium alginate has the exciting ability to reduce man's absorption of radioactive strontium by about...
...full program of detonations is carried out. They fear that the problem of disposing of the radioactive gas created by these explosions has not been sufficiently studied. Even more dangerous, in their view, is the possibility that underground water supplies might be contaminated by accumulations of long-lived strontium 90 and cesium...
...precisely the Government's wisdom that the Colorado scientists question. "It took the AEC three years to acknowledge that strontium 90 appeared in milk and was a hazard to human health," says Biochemist H. Peter Metzger. "The last time they supervised anything in Colorado, they allowed uranium miners to leave radioactive tailings lying around that could be blown over homes, farms and grazing lands and carried hundreds of miles downstream by rivers. The AEC is always saying things are 95% safe. We worry about the other...
...Barry Commoner, 52, chairman of the botany department at Washington University in St. Louis, is a prolific lecturer and writer (Science and Survival) who brings an ecologist's insight and a polemicist's passion to the dangers of environmental pollution. "The new technological man," says Commoner, "carries strontium 90 in his bones, iodine 131 in his thyroid, DDT in his fat and asbestos in his lungs. There is now simply not enough air, water and soil on earth to absorb man-made poisons without effect. If we continue in our reckless way, this planet before long will become...
Several groups of the eager investigators have been assigned the job of measuring the age of the lunar specimens by radioactive dating methods. By determining the ratio of radioactive elements (say, rubidium and uranium) in a moon sample to the amounts of their products of decay (strontium and lead, respectively), scientists can make a good approximation of its age. Thus, because the Apollo 11 samples will be taken from the surface of the Sea of Tranquillity, researchers may well be able to estimate the age of the moon's maria, or seas. This, in turn, might settle a longstanding controversy...