Word: hydrogen
(lookup in dictionary)
(lookup stats)
Dates: all
Sort By: most recent first
(reverse)
...young Bergius conceived the idea of making motor fuel from coal by hydrogenation under high heat and heavy pressure. Over the following two decades he and other chemists in Germany, Britain and Canada converted the idea into an industrial fact. Finely powdered coal is made into a paste by mixing with tar or a tar derivative, the mixture fed into a heavy steel cylinder. At 840° F, hydrogen gas is brought in under 3,700 Ib. per sq. in. pressure. The hydrogen combines with the carbon or carbon compounds in the coal...
...winter without catching cold because warm blood is sent coursing through her skin by a sex hormone called theelin. Principal function of theelin (Greek theelis, female) is to make a woman womanly. It is elaborated by the ovaries.* The theelin molecule contains 18 atoms of carbon, 22 of hydrogen, two of oxygen...
Neutrons have about the same mass as the heart of a hydrogen atom, but they are much smaller. Dr. George Braxton Pegram and his associates at Columbia have set the neutron diameter at one ten-trillionth of an inch. Unlike electrons, positrons, protons and deuterons, neutrons have no electric charge. Hence they make splendid projectiles for bombardment since they are not repelled by the positive charges on the atomic nuclei. Alpha particles knock neutrons in quantity out of beryllium and other light elements at speeds up to 30,000 miles per second. When the neutron hits a nucleus it either...
Thus Dr. Fermi holding a ball of paraffin in his hand symbolizes a matter of immense importance to biology. Organic substances are rich in hydrogen. Professor Ernest Orlando Lawrence of the University of California, whose huge apparatus produces a beam of 10,000,000 neutrons a second, finds that on the white blood cells of rats neutrons exert ten times the destructive effect of X rays of equal intensity. As laid down last month in the American Journal of Roentgenology and Radium Therapy, the biologic neutron problems now confronting science are these...
...great airdock at Lakehurst, idle since the Akron and Macon disasters. To permit the vast Hindenburg to fit the Lakehurst hangar, Dr. Eckener removed two ribs, thus shortened her seven feet. Even so, she is 803 ft. long, 135 ft. high, holds some 7,000,000 cu. ft. of hydrogen, has nearly twice the bulk of the old Graf Zeppelin...