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chiropractic

(Encyclopedia)chiropractic kīrəprăkˈtĭk [key] [Gr.,=doing by hand], medical practice based on the theory that all disease results from a disruption of the functions of the nerves. The principal source of inter...

microphone

(Encyclopedia)microphone, device for converting sound into electrical energy, used in radio broadcasting, recording, and sound amplifying systems. Its basic component is a diaphragm that responds to the pressure or...

Olbers, Heinrich Wilhelm Matthäus

(Encyclopedia)Olbers, Heinrich Wilhelm Matthäus hīnˈrĭkh vĭlˈhĕlm mätĕˈo͝os ôlˈbərs [key], 1758–1840, German astronomer and physician. He originated (1797) the first satisfactory method for calculat...

California, University of

(Encyclopedia)California, University of, at ten campuses, main campus at Berkeley; land-grant and state supported; coeducational; chartered 1868, opened 1869 when it took over the College of California (est. 1853 a...

Molina, Mario

(Encyclopedia)Molina, Mario (Mario José Molina-Pasquel y Henríquez), 1943–2020, Mexican chemist, Ph.D. Univ. of California, Berkeley, 1972. Molina was a professor at the Univ. of California, Irvine from 1975 to...

Randolph, Edward

(Encyclopedia)Randolph, Edward, c.1632–1703, English colonial agent in America. In 1676 he carried royal instructions to Massachusetts Bay that required the colony to send representatives to England to satisfy co...

shock absorber

(Encyclopedia)shock absorber, device for reducing the effect of a sudden shock by the dissipation of the shock's energy. On an automobile, springs and shock absorbers are mounted between the wheels and the frame. W...

Chernomyrdin, Viktor Stepanovich

(Encyclopedia)Chernomyrdin, Viktor Stepanovich vyēkˈtôr styĭpänˈəvyĭch chərˌnōmĭrˈdən [key], 1938–2010, Soviet and Russian government official. Beginning in 1957, he held positions in the Soviet nat...

Organization of Petroleum Exporting Countries

(Encyclopedia)Organization of Petroleum Exporting Countries (OPEC), multinational organization (est. 1960, formally constituted 1961) that coordinates petroleum policies and economic aid among oil-producing nations...

cytosine

(Encyclopedia)cytosine sīˈtōsēnˌ [key], organic base of the pyrimidine family. It was isolated from the nucleic acid of calf thymus tissue in 1894. A suggested structure for cytosine, published in 1903, was co...