Word: fissioned
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Dates: during 1940-1949
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Puzzle to Fission. Late in 1938 a distinguished German chemist named Otto Hahn, of Berlin's Kaiser Wilhelm-Institute, was bombarding uranium with "slow" neutrons of low energy. As one of the end products, he identified barium. This puzzled him, but he published a diffident note on it in Naturwissenschalfen...
Centrifuges. The three-way split will not put atomic power to work tomorrow. The only promising kind of uranium for neutron-splitting or "fission" is the isotope called U-235.- This kind is scarce and extremely difficult to separate from the common isotope, 11-238. So far, not enough U-235 has been isolated to put in a fruit fly's eye. A Swedish scientist was beginning to speed up the process with gadgets called thermal diffusion tubes when the war stopped him. Another line of attack is with centrifuges - whirling machines which work like cream separators...
...Such fission of one agency into two is common in the advertising business; is in fact the way Bill Benton and Chester Bowles got started in 1929. For Ted Bates, B. & B.sters wished nought but well last week. According to trade talk, the prime reasons for their loss were: 1) the competition of a Chicago agency called Sherman & Marquette, 2) the ruminations of C-P-P's bright, big-eared executive vice president, James S. Adams...
Paramecia reproduce mostly by fission -splitting in two-like the smaller and simpler amoebae, but now & then paramecia mate by clinging together in pairs. This seems to put new vigor into the reproductive cycle. Some paramecium pairs come together violently, adhere for 24 to 36 hours. Other matings are gentler, even flirtatious. Dr. Jennings said he had seen pairs nuzzle each other several times, then swim off side by side in graceful spirals, like "couples in a dance." After years of watching these goings-on, Dr. Jennings was willing to carry the origins of social behavior all the way back...
Lest the news from Paris terrify timid people, Physicist John Ray Dunning of Columbia said that fission experimenters now believe there is an automatic check against a multiplying chain reaction getting out of control. The accelerating release of atomic energy would heat up the uranium specimen; this heat would speed up the neutrons beyond the point of maximum effectiveness for fissions, and the reaction would therefore slow down, and stop...