Word: celle
(lookup in dictionary)
(lookup stats)
Dates: all
Sort By: most recent first
(reverse)
Snow was falling on the sea. Each ship in the convoy moved through the night in a white-curtained cell of its own: the transports from New York, laden with munitions for Russia; the high-sided, thick-bowed Russian destroyers, adapted from Italian designs for ice-breaking and patrol in rough northern waters; Britain's new (1939) 8,000-ton cruiser Trinidad, the old and war-tried destroyer Eclipse, several other warships under the Union Jack. This convoy, for the first time in World War II, had brought together British and Soviet naval units for a common...
...electrical charge on a single muscle cell has been precisely measured for the first time, announced Dr. Ralph Gerard of the University of Chicago last week. Using needle-fine microelectrodes on 3/1,000-inch cells from frog muscles, he detected charges of 6/100ths of a volt. This surprisingly large potential is lost when the muscle moves. Thus, said Gerard, stimulation of a muscle consists in momentarily short-circuiting its electrical balance...
Unlike many scientific developments, this invention by an M.I.T. chemist is more than an advance into the hinterlands of already explored territory-it is a landing on a strange and alien coast. The light-transforming action of this cell can be roughly compared to the synthesis of food within green plants, a process which scientists have not been able to duplicate, even crudely...
...this current Rabinowitch arranged a simple device. "If now two metal electrodes are immersed in such a solution," he explained last week, "and if the liquid around one electrode is illuminated and the other is kept dark, the system becomes a galvanic cell in which chemical energy, formed by the conversion of light, is itself immediately converted into electrical energy." Galvanic cells and batteries-usually making current from the slow dissolving of zinc in sulfuric acid-are not uncommon, but Rabinowitch's is unique in that it will never wear...
...output of Rabinowitch's cell is measured in thousandths of amperes, but he is working to improve its efficiency. Not over .1% of the absorbed light is converted into electrical energy, as compared to chlorophyll, which utilizes about 1% of the light it absorbs...