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Vanadzor

(Encyclopedia)Vanadzor, city (1989 pop. 75,616), in N Armenia, at the junction of the Pambak, Tandzut, and Vanadzoriget rivers. A rail center and a major chemical producer, it also manufactures textiles and foodstu...

Tlalnepantla de Baz

(Encyclopedia)Tlalnepantla de Baz tlälnāpänˈtlä ᵺā bäs [key], city (1990 pop. 702,270), Mexico state, S central Mexico, on the Tlalnepantla River. It is a communications and industrial center that owes its...

Thionville

(Encyclopedia)Thionville tyôNvēlˈ [key], Ger. Diedenhofen, town (1990 pop. 40,835), Moselle dept., NE France, in Lorraine. It is a center for metallurgical and chemical industries. The town was a favorite of Cha...

sodium benzoate

(Encyclopedia)sodium benzoate or benzoate of soda, chemical compound, C6H5CO2Na, colorless or white crystalline, aromatic compound; the sodium salt of benzoic acid. It is soluble in water and is used as a preservat...

sintering

(Encyclopedia)sintering, process of forming objects from a metal powder by heating the powder at a temperature below its melting point. In the production of small metal objects it is often not practical to cast the...

Sarnia

(Encyclopedia)Sarnia, city (1991 pop. 74,376), S Ont., Canada, on the St. Clair River, at the south end of Lake Huron and opposite Port Huron, Mich. The two cities are connected by a railroad tunnel, and there is a...

Rheinhausen

(Encyclopedia)Rheinhausen rīnˈhouˌzən [key], former town, North Rhine–Westphalia, NW Germany, a port on the Rhine River; chartered 1934. Manufactures include metal products, machinery, textiles, mining and ch...

Orsk

(Encyclopedia)Orsk ôrsk [key], city (1989 pop. 271,000), Orenburg region, in the foothills of the S Ural Mts., central Russia, on the Ural River. It is the center of the Orsk-Khalilovo industrial area, which has r...

stellar structure

(Encyclopedia)stellar structure, physical properties of a star and the processes taking place within it. Except for that of the sun, astronomers must draw their conclusions regarding stellar structure on the basis ...

hypersensitivity

(Encyclopedia)hypersensitivity, heightened response in a body tissue to an antigen or foreign substance. The body normally responds to an antigen by producing specific antibodies against it. The antibodies impart i...