Word: nitrogenous
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...model of DNA's structure worked out by F. H. C. Crick of Cambridge University and J. D. Watson of Harvard, long strands of atoms are coiled together to make a spiral. Pairs of molecules called "nitrogen bases" connect the coils, which unwind in the process of duplication and assemble themselves on new strands. A series of experiments done a year ago at the California Institute of Technology, after which Sueoka patterned his experiments, supports this hypothesis...
Sueoka grew the algae in a nutrient medium containing an isotope of nitrogen with an extra neutron in its nucleus. Since DNA contains nitrogen, newly synthesized cells become "labeled" or marked with the heavy nitrogen...
Eugene G. Rochow, professor of Chemistry, will be the fourth lecturer. He will analyze "The Great Nitrogen Shortage...
...water, and breathing air at a pressure of about ten atmospheres, 134 p.s.i. above normal. Instead of being searing hot, as they had feared, it proved comfortably warming. But there was no time to enjoy it. Not a second could be lost, or they would begin to suffer nitrogen poisoning-Jacques Yves Cousteau's "rapture of the deep"-which makes men behave irrationally and often suicidally...
...Vega will use an Atlas D as its first stage. The second stage, powered by a General Electric X405 rocket engine, is intended to place a 2½-ton satellite in a 300-mile orbit. Later Vegas will have third stages fueled with a J.P.L.-developed mixture, hydrazine and nitrogen textroxide, and should be capable of putting a 500-lb. vehicle on Mars...