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hydrogen fluoride

(Encyclopedia)hydrogen fluoride, chemical compound, HF, a colorless, fuming liquid or colorless gas that boils at 19.54℃. It is miscible with water and is soluble in benzene, toluene, and concentrated sulfuric ac...

glycolysis

(Encyclopedia)glycolysis glīkŏlˈĭsĭs [key], term given to the metabolic pathway utilized by most microorganisms (yeast and bacteria) and by all “higher” animals (including humans) for the degradation of gl...

American Samoa, The National Park of

(Encyclopedia)American Samoa, The National Park of, c.9,000 acres (3,645 hectares), American Samoa, S Pacific Ocean. Comprising areas on the islands of Ofu, Ta'u, and Tutuila, the park features the only paleotropic...

sulfate

(Encyclopedia)sulfate, chemical compound containing the sulfate (SO4) radical. Sulfates are salts or esters of sulfuric acid, H2SO4, formed by replacing one or both of the hydrogens with a metal (e.g., sodium) or a...

tryptophan

(Encyclopedia)CE5 tryptophan trĭpˈtəfăn [key], organic compound, one of the 20 amino acids commonly found in animal proteins. Only the l-stereoisomer appears in mammalian protein. It is one of several essent...

Bilauktaung

(Encyclopedia)Bilauktaung bēloukˈtoun [key], mountain range, extending c.250 mi (400 km) along the Thailand-Myanamar border from the Dawna Range SE to the Isthmus of Kra. The western slopes of the range, which re...

Prince

(Encyclopedia)Prince, 1958–2016, American singer and songwriter, b. Minneapolis, Minn., as Prince Rogers Nelson. Biracial, slim, and sexily androgynous, he was an electrifying performer who composed hundreds of s...

superphosphate

(Encyclopedia)superphosphate or superphosphate of lime, Ca(H2PO4)2, is a compound produced by treating rock phosphate with sulfuric acid or phosphoric acid, or a mixture of the two. It is the principal carrier of p...

Kornberg, Arthur

(Encyclopedia)Kornberg, Arthur, 1918–2007, American biochemist, b. Brooklyn, grad. College of the City of New York (B.S., 1937) and Univ. of Rochester (M.D., 1941). In 1942 he joined the U.S. Public Health Servic...

polyacrylics

(Encyclopedia)polyacrylics pŏlˌēəkrĭlˈĭks [key], group of thermoplastics that are transparent and highly decorative (see plastic). The polyacrylics, or acrylic plastics, are polymers (and copolymers) of deri...