Word: svedberg
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Dates: during 1930-1939
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...recent years Dr. The Svedberg, a Swedish Nobelman, has done much research on giant protein molecules, determining their molecular weights after separating them in powerful centrifuges (whirling machines) of his own devising...
...British journal Nature fortnight ago, Dr. Svedberg reported experiments on molecules of hemocyanin (molecular weight, 6,740,000 units), a blue pigment from the blood of mollusks. He and his co-workers at the University of Upsala bombarded the hemocyanin particles with quanta of energy in the form of ultraviolet light. Certain wave lengths of the bombarding radiation split the blood pigment molecules into halves. This was like splitting inorganic atoms in a high-voltage atom-smasher...
...Primary protein reactions," declared Dr. Svedberg, "are . . . elementary acts which must, of necessity, obey the laws of quantum mechanics." The implications of this statement are vastly more important to science than the actual splitting of blood pigment molecules. If the quantization of biological processes can be continued far enough, it will be possible to explain in exact mathematical terms-in terms of atomic energy levels and electronspins-what happens when insulin is secreted in the pancreas, when starch is broken down in the digestive system, when an ovum is penetrated and fertilized by a spermatozoon, many & many a complex biological...
...Sweden, Nobel Laureate The Svedberg had designed an ultracentrifuge - a machine which separates heavy molecules from light ones, inferentially measuring their molecular weights, by whirling them at enormous speeds. In this ultracentrifuge the molecular weight of the Stanley crystals was found to be about 17,000,000 units (17,000,000 times as heavy as a hydrogen atom...
...Then Svedberg, Wyckoff and others weighed & measured the giants by whirling them in powerful ultracentrifuges. Stanley found that the virus which causes tobacco mosaic disease in plants is a huge molecule, which was weighed by Svedberg and Wyckoff at 17,000,000 times as much as a hydrogen atom. The virus of noninfectious rabbit warts was isolated as a protein molecule weighing 20,000,000 units...