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compost
(Encyclopedia) compost, substance composed mainly of partly decayed organic material that is applied to fertilize the soil and to increase its humus content; it is often used in vegetable farming,…amide
(Encyclopedia) amideamideămˈīd [key], organic compound formed by reaction of an acid chloride, acid anhydride, or ester with an amine. Under strong acidic conditions an amide can be hydrolyzed to…podzol
(Encyclopedia) podzolpodzolpŏdˈsŏl [key] or podzolic soil, member of a group of soils that are gray in color, have an ashy appearance, and extend immediately south of the tundra regions of the…polyester
(Encyclopedia) polyester, synthetic fiber, produced by the polymerization of the product formed when an alcohol and organic acid react. The outstanding characteristic of polyesters is their ability…Corey, Elias James
(Encyclopedia) Corey, Elias James, 1928–, American organic chemist and educator, b. Methuen, Mass., grad. Massachusetts Institute of Technology (B.S. 1948, Ph.D. 1951). He has taught at the Univ. of…Hevesy, Georg von
(Encyclopedia) Hevesy, Georg vonHevesy, Georg vongāˈôrkh fən hĕˈvĕshē [key], 1885–1966, Hungarian physicist and chemist. He received the 1943 Nobel Prize in Chemistry for his work on the use of…Calvin, Melvin
(Encyclopedia) Calvin, Melvin, 1911–97, American organic chemist and educator, b. St. Paul, Minn., grad. Michigan College of Mining and Technology, 1931, Ph.D. Univ. of Minnesota, 1935. In 1937 he…Wallon, Henri Alexandre
(Encyclopedia) Wallon, Henri AlexandreWallon, Henri AlexandreäNrēˈ älĕksäNˈdrə välôNˈ [key], 1812–1904, French historian and politician. He was elected (1871) to the national assembly, and it was his…gum, colloidal plant substance
(Encyclopedia) gum, term commonly applied to any of a wide variety of colloidal substances somewhat similar in appearance and general characteristics, exuded by or extracted from plants. In this…phosphate
(Encyclopedia) phosphate, salt or ester of phosphoric acid, H3PO4. Because phosphoric acid is tribasic (having three replaceable hydrogen atoms), it forms monophosphate, diphosphate, and triphosphate…Trending
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