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fumaric acid

(Encyclopedia)fumaric acid fyo͞omărˈĭk [key] or trans-butenedioic acid, HO2CCH=CHCO2H, unsaturated dicarboxylic acid that melts at 287℃. Maleic acid, or cis-butenedioic acid, is a geometric isomer of fumaric ...

Williams, Eleazer

(Encyclopedia)Williams, Eleazer ĕlēāˈzər [key], c.1787–1858, missionary among Native North Americans. He was the son of Thomas Williams, a St. Regis Native American chief, and a white woman; he was educated ...

Hsüan-tsang

(Encyclopedia)Hsüan-tsang shüän-dzäng [key], 605?–664, Chinese Buddhist scholar and translator. He early entered monastic life and later traveled in China, teaching and studying. Between 629 and 645 he made a...

Marston, John

(Encyclopedia)Marston, John, 1576–1634, English satirist and dramatist, b. Oxfordshire, grad. Oxford, 1594. In accordance with his father's wishes he studied law at Middle Temple, but his interests soon turned to...

citric acid

(Encyclopedia)citric acid or 2-hydroxy-1,2,3-propanetricarboxylic acid, HO2CCH2C(OH)(CO2H)CH2CO2H, an organic carboxylic acid containing three carboxyl groups; it is a solid at room temperature, melts at 153℃, an...

Desai, Anita

(Encyclopedia)Desai, Anita dĕsīˈ [key], 1937–, Indian fiction writer, b. Mussoorie as Anita Mazumdar, grad. Delhi Univ. (B.A., 1957). A prolific novelist, she often paints a subtly intelligent and darkly evoca...

oxalic acid

(Encyclopedia)oxalic acid ĕthˌāndīōĭk [key], HO2CCO2H, a colorless, crystalline organic carboxylic acid that melts at 189℃ with sublimation. Oxalic acid and oxalate salts are poisonous. Oxalic acid is found...

holmium

(Encyclopedia)holmium hōlˈmēəm [key] [Lat.,=Stockholm], metallic chemical element; symbol Ho; at. no. 67; at. wt. 164.93032; m.p. about 1,474℃; b.p. about 2,425℃; sp. gr. 8.78 at 25℃; valence +3. Holmium ...

Hotan

(Encyclopedia)Hotan kōˈtänˈ [key], city and oasis (1994 est. pop. 75,900), SW Xinjiang Uygur Autonomous Region, China, near the headstream of the Hotan River; the name sometimes appears as Ho-t'ien. It is the c...

Montferrat

(Encyclopedia)Montferrat mŏntfərătˈ, –rätˈ [key], Ital. Monferrato, historic region of Piedmont, NW Italy, south of the Po River, now mostly in Alessandria prov. It is largely hilly, and wine, fruit, and ce...