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mulch
(Encyclopedia) mulch, any material, usually organic, that is spread on the ground to protect the soil and the roots of plants from the effects of soil crusting, erosion, or freezing; it is also used…carbon disulfide
(Encyclopedia) carbon disulfide, CS2, liquid organic compound; it is colorless, foul-smelling, flammable, and poisonous. It can be prepared by direct reaction of carbon, e.g., as charcoal, with…saturation, of an organic compound
(Encyclopedia) saturation, of an organic compound, condition occurring when its molecules contain no double or triple bonds and thus cannot undergo addition reactions. For example, ethane (H3C–CH3)…Fallingwater
(Encyclopedia) Fallingwater, Bear Run, Pa., house designed by Frank Lloyd Wright. Fallingwater (1936–39) is an architectural tour de force of Wright's organic philosophy, whereby a building should be…Wittig, Georg
(Encyclopedia) Wittig, Georg, 1897–1987, German chemist, Ph.D. Univ. of Marburg, 1926. During his career, Wittig was a professor at the universities of Braunschweig, Freiburg, Tübingen, and…ether, in chemistry
(Encyclopedia) CE5 Ethers ether, any of a number of organic compounds whose molecules contain two hydrocarbon groups joined by single bonds to an oxygen atom. The most common of these compounds…heterotroph
(Encyclopedia) heterotrophheterotrophhĕtˈərətrōfˌ [key], living organism that obtains its energy from carbohydrates and other organic material. All animals and most bacteria and fungi are…MacMillan, David W.C.
(Encyclopedia) MacMillan, David W.C., 1968–, b. Bellshill, U.K. Scotish chemist, James S. McDonnell Distiguished University Professor in Chemistry…Pregl, Fritz
(Encyclopedia) Pregl, FritzPregl, Fritzfrĭts prāˈgəl [key], 1869–1930, Austrian physiologist and chemist, M.D. Univ. of Graz, 1894. He taught at the universities of Innsbruck (1910–13) and Graz (from…palpitation
(Encyclopedia) palpitationpalpitationpălˌpĭtāˈshən [key], abnormal heartbeat that is often associated with a sensation of fluttering or thumping. The normal heartbeat is not noticeable to the…Trending
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