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Word: ruthenium (lookup in dictionary) (lookup stats)
Dates: during 1950-1959
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Usage:

...tower shot" that stirred up millions of tons of quick-settling coral dust. First radioactive material from the May 21 explosion was brought home by the tuna boat Stiruga Maru. Analyzed by Dr. Kenjiro Kimura of Tokyo University, it proved to contain a familiar array of fission products-ruthenium, rhodium, tellurium, iodine, cerium, neodymium, etc.-as well as uranium 237 and neptunium 239. This combination of elements indicated that the explosion was the "fission-fusion-fission" type, which gets much of its energy from the fission of normally inactive uranium...

Author: /time Magazine | Title: Science: Measuring the H-Bomb | 7/2/1956 | See Source »

...through these papers have actually sent a few whistles up and down AEC corridors." Probably the papers most useful to the scientists will be of no public interest at all. They will be minute details about obscure matters. One British paper, for instance, tells about the troublesome chemistry of ruthenium, a rare element that had almost no importance before atomic science was born. But it is a fission product formed in nuclear reactors, and it has to be dealt with during the purification of reactor fuels. The information in the U.S. paper probably represents hundreds of man-years of scientific...

Author: /time Magazine | Title: Science: The Philosophers' Stone | 8/15/1955 | See Source »

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