Word: shipman
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...broke the tie in the third quarter with a line plunge through the massive Boston line to put the Crimson in the lead, 12 to 6. With the Yardling pass defense tightened, B.C. kept the ball on the ground but were unable to retain possession. Crimson half-back John Shipman then slipped around end for a 15 yard touchdown...
...bomb can be clean in one way and dirty in another. In Science, William H. Shipman and other scientists from the Naval Radiological Defense Laboratory, San Francisco, tell how they found large quantities of radioactive manganese 54 in the fallout from last year's thermonuclear tests at Eniwetok. Since Mn-54 is not a fission product, they concluded that it was formed when free neutrons from the explosion combined with iron or ordinary manganese, presumably in the bomb's structure. Figuring back, they estimated that "megacurie quantities" were produced...
...very dangerous amounts; the maximum permissible concentration of cobalt 60 in the human body is listed by the Bureau of Standards as three microcuries. A man would have to eat at least ten of the hot clams (20 Ibs. of flesh) to exceed this limit. But Weiss and Shipman cannot be sure that cobalt 60 was not heavily concentrated in some special part of the clam's tissue, increasing the danger proportionately...
Unsuspected Mechanism. Weiss and Shipman were not aware when they began their work that clams have a love for cobalt. To find out whether other species than the giant clam like to collect it, they added a little cobalt to San Francisco Bay water (which normally has no detectable trace) and put some local clams into it. Later analysis by the Navy team showed that these clams also have the trait of collecting cobalt...
Weiss and Shipman did not intend to scare anyone with the investigation, but their work has revealed an unsuspected "biological mechanism" that acts selectively on a single radioactive isotope, raising its concentration from an undetectable amount to the vicinity, at least, of the danger level. Biologists cannot be sure that other living organisms, both animals and plants, do not concentrate other radioactive isotopes in places where they may damage...