Word: proteins
(lookup in dictionary)
(lookup stats)
Dates: during 1930-1939
Sort By: most recent first
(reverse)
Pacemaker. Most biologists believe that the evolution of higher organisms works through genes-tiny little somethings (probably protein molecules) strung along the chromosomes in the germ plasm. Thousands of genes controlling various body characteristics have been traced in Drosophila melanogaster, the scientifically celebrated little fruit fly. It is by changes in these genes that evolution of different types of organisms takes place. But last week Dr. Millislav Demerec of the Carnegie Institution's Department of Genetics announced his opinion- based on careful research-that chromosomes contain one gene, which, by affecting all the genes, speeds up the rate...
...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...
...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...
Salter, in association with Thomas S. Sappington '37, and Miss Hildegarde Wilson, has found, by experimentation on mice, that insulin, thyroid extract, and anterior pituitary gland hormones contain protein substances. The stomach contains enzymes which break up and digest proteins; thus insulin or any other protein type of hormone, if swallowed as food or drink, is treated as protein material...
...powder is a "globulin," a protein substance derived from the plasma of the beef blood; plasma is the fluid portion of the blood from which the red and white cells have been removed...