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annealing

(Encyclopedia)annealing ənēlˈĭng [key], process in which glass, metals, and other materials are treated to render them less brittle and more workable. Annealing consists of heating the material and then cooling...

Springs

(Encyclopedia)Springs, city, now part of Ekurhuleni metropolitan municipality, Gauteng prov., NE South Africa. It is an industrial center of the Witwatersrand, a gold- and uranium-mining region. Manufacturing has r...

terbium

(Encyclopedia)terbium tûrˈbēəm [key] [from Ytterby, a village in Sweden], metallic chemical element; symbol Tb; at. no. 65; at. wt. 158.92535; m.p. 1,356℃; b.p. 3,123℃; sp. gr. about 8.25; valence +3 or +4....

rhodium

(Encyclopedia)rhodium rōˈdēəm [key], metallic chemical element; symbol Rh; at. no. 45; at. wt. 102.90550; m.p. about 1,966℃; b.p. 3,727±100℃; sp. gr. 12.41 at 20℃; valence +2, +3, +4, +5, or +6. Rhodium ...

dysprosium

(Encyclopedia)dysprosium dĭsprōˈzēəm [key] [Gr.,=hard to get at], metallic chemical element; symbol Dy; at. no. 66; at. wt. 162.500; m.p. 1,412℃; b.p. 2,562℃; sp. gr. 8.54 at 25℃; valence+3. Dysprosium i...

coca

(Encyclopedia)coca kōˈkə [key], common name for shrubs of the genus Erythroxylum, particularly E. coca, of the family Erythroxylaceae, and found abundantly in upland regions and on mountain slopes of South Ameri...

Death Valley

(Encyclopedia)Death Valley, SE Calif. and SW Nev., a deep, arid basin, 140 mi (225 km) long, bordered on the W by the Panamint Range and on the E by the Amargosa Range. In summer the valley has recorded some of the...

bleaching

(Encyclopedia)bleaching, process of whitening by chemicals or by exposure to sun and air, commonly applied to textiles, paper pulp, wheat flour, petroleum products, oils and fats, straw, hair, feathers, and wood. C...

Reşiţa

(Encyclopedia)Reşiţa rĕˈshētsä [key], Hung. Resiczabánya, city (1990 pop. 110,519), W Romania, in the Banat, in the western foothills of the Transylvanian Alps. It is a railroad terminus and a leading Romani...

Taube, Henry

(Encyclopedia)Taube, Henry, 1915–2005, American inorganic chemist, b. Saskatchewan, Canada. He earned his Ph.D. at Berkeley in 1940, taught at Cornell from 1941. became a U.S. citizen in 1942, joined the faculty ...