Word: biophysicist
(lookup in dictionary)
(lookup stats)
Dates: during 1930-1939
Sort By: most recent first
(reverse)
...Ralph Walter Graystone Wyckoff, a Rockefeller biophysicist, uses a squeeze-press, an ultracentrifuge (TIME, Feb. 6, 1933), and an X-ray analyzer of crystalline substances. The press enables him to get juices from infected tissue without modifying ingredients in the slightest. The ultracentrifuge, whirling at 50,000 revolutions per minute, separates the ingredients into layers, including one of pure crystalline virus. X-rays prove that this virus, obtained by physical means, is exactly the same as the virus which Dr. Stanley obtained by chemical means...