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fatigue, in physiology
(Encyclopedia) fatigue, in physiology, inability to perform reasonable and necessary physical or mental activity. Muscle fatigue, for example, results when the contractile properties of muscle are…nitric oxide
(Encyclopedia) nitric oxide or nitrogen monoxide, a colorless gas formed by the combustion of nitrogen and oxygen as given by the reaction: energy + N2 + O2 → 2NO; m.p. −163.6℃; b.p. −151.8℃. Nitric…universe
(Encyclopedia) universe, totality of matter and energy in existence. The study of the origin of the universe, or cosmos, is known as cosmogony, and that of its structure and evolution, cosmology. The…Economic Community of West African States
(Encyclopedia) Economic Community of West African States (ECOWAS), organization established in 1975 to increase economic cooperation and development in West Africa. Members include Benin, Burkina…Joffe, Abram
(Encyclopedia) Joffe, AbramJoffe, Abraməbrämˈ yôˈfyə [key], 1880–1960, Soviet scientist, b. Ukraine, grad. St. Petersburg Technological Institute, 1902. From 1902 to 1906 he worked in Munich as an…Montt, Pedro
(Encyclopedia) Montt, PedroMontt, Pedropāˈᵺrō [key]Montt, Pedro mōnt [key], 1848–1910, president of Chile (1906–10). Son of Manuel Montt, he held with distinction several government posts. He was a…Brahic, André Fernand
(Encyclopedia) Brahic, André Fernand, 1942–2016, French astrophysicist, b. Paris. He was introduced to astrophysics by Evry Schatzman, a leading French theoretician, and obtained his doctorate from…Abbot, Charles Greeley
(Encyclopedia) Abbot, Charles Greeley, 1872–1973, American astrophysicist, b. Wilton, N.H. He was acting director in 1896 and director in 1907 of the astrophysical observatory of the Smithsonian…scalar
(Encyclopedia) scalar, quantity or number possessing only sign and magnitude, e.g., the real numbers (see number), in contrast to vectors and tensors; scalars obey the rules of elementary algebra.…maser
(Encyclopedia) masermasermāˈzər [key], device for creation, amplification, and transmission of an intense, highly focused beam of high-frequency radio waves. The name maser is an acronym for…Trending
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