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...that solid cancers have an abnormal appetite for the metabolite called uracil, the University of Wisconsin's Dr. Charles Heidelberger set about making a phony variant of uracil. With Dr. Robert Duschinsky of Hoffmann-La Roche, Inc., he quickly found a way to make one by substituting an atom of fluorine for one of hydrogen at the No. 5 position on the molecular ring-hence, 5-fluorouracil. Many of the cancer cells accept 5-fluorouracil in place of the real thing, and cannot multiply...

Author: /time Magazine | Title: Medicine: Mister Sam's Drug | 10/20/1961 | See Source »

...electrons in an atom are already at the higher levels, incoming radiation of the proper frequency can "trigger" their fall, thus producing new radiation of the same frequency as the original signal and in effect amplifying...

Author: By Gerald R. Davidson, | Title: Professor Receives Award For Invention of "Maser" | 10/18/1961 | See Source »

According to quantum theory, an electron in an atom can exist at any one of several discrete energy levels. When an electron falls from a higher level to a lower one, the atom gives off radiation at a specific frequency--for example, a microwave or a light wave...

Author: By Gerald R. Davidson, | Title: Professor Receives Award For Invention of "Maser" | 10/18/1961 | See Source »

...howitzers, and such missiles as the Honest John, the 75-mile Corporal, the 200-mile Redstone and the 25-mile Lacrosse. In addition, NATO's tactical air forces, built around U.S. fighter-bombers, could unleash an overwhelming nuclear bombardment. Fighting with the atom, NATO has calculated that it could stop the Russians, even if they threw 40 divisions into the attack and supported them with their own tactical and strategic weapons...

Author: /time Magazine | Title: Armed Forces: This Is the Army | 10/13/1961 | See Source »

...Nina Petrovna Khrushchev at the Moscow House of Friendship. Russia's first lady remained friendly even when one of her guests asked her, over apples and chocolates, to "convey to your husband the deep concern we feel that within the past month the Soviet Union has tested 17 atom bombs...

Author: /time Magazine | Title: Russia: March to Moscow | 10/13/1961 | See Source »

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