Word: nuclei
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Dates: during 1940-1949
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According to this account, the Nazis may have discovered an entirely new approach to atomic explosives. Before wartime censorship blacked out all talk of atomic experiments, it was known that most scientists put their atom-smashing hopes mainly in cyclotronic bombardment of atoms with deuterons-the heavy hydrogen nuclei derived from heavy water. Individual atoms have been smashed, but in a bomb atoms must explode in quantity, each disintegrating atom setting off others. The new Nazi experiments are said to be along lines suggested by the composition of the "White Dwarf," companion of Sirius, which is the densest known star...
...weighs about one ton. Physicists believe that ordinary atoms could not be compressed to such density, and they suppose that the tremendous pressures and high temperature of the White Dwarf have broken up its atoms, letting their space-hungry electrons escape and leaving only the much more compact atomic nuclei...
...Bacteria are far from being homogeneous globs of matter. The micrographs clearly show membranes, nuclei, sometimes surrounding capsules and whiplike appendages called flagella. Some of these details had been seen with ordinary microscopes, but many were unsuspected...
...found that all except some abnormal clusters have luminosities between 1,000 and 400,000 times the sun's luminosity." Dr. Shapley said. "The nuclei of two well-known spiral galaxies are shown to have luminosities within this same interval. Since the nuclei also have forms and stellar compositions similar to those of globular clusters an evolutionary connection between the two major types of large stellar systems is suggested...
...that college social as well as intellectual life had "disintegrated," Lowell conceived Harvard's system of "Houses," modeled after Oxford's colleges. In 1932, with a gift of $13,000,000 from Yaleman Edward Stephen Harkness,* Harvard finished its group of seven redbrick, white-spired Georgian social nuclei, each with its own library, tutors and dining-hall...