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basic oxygen process

(Encyclopedia)basic oxygen process, method of producing steel from a charge consisting mostly of pig iron. The charge is placed in a furnace similar to the one used in the Bessemer process of steelmaking except tha...

cesium

(Encyclopedia)cesium sēˈzēəm [key] [Lat.,=bluish gray], a metallic chemical element; symbol Cs; at. no. 55; at. wt. 132.90545; m.p. 28.4℃; b.p. 669.3℃; sp. gr. 1.873 at 20℃; valence +1. Cesium is a ductil...

nitrogen

(Encyclopedia)nitrogen nīˈtrəjən [key], gaseous chemical element; symbol N; at. no. 7; interval in which at. wt. ranges 14.00643–14.00728; m.p. −209.86℃; b.p. −195.8℃; density 1.25 grams per liter at ...

Pechenga

(Encyclopedia)Pechenga pyĕˈchĭn-gə [key], Finnish Petsamo, town, NW European Russia, an ice-free port at the head of Pechenga Fjord on the Barents Sea and near the Norwegian border. It is also the northern term...

denture

(Encyclopedia)denture, artificial replacement for natural teeth and surrounding tissue. Dentures are classified as partial or complete. The former are removable and maintained by clasps, or are fixed bridges with c...

index number

(Encyclopedia)index number, in econometrics, a figure reflecting a change in value or quantity as compared with a standard or base. The base usually equals 100 and the index number is usually expressed as a percent...

Petropavlovsk, city, Russia

(Encyclopedia)Petropavlovsk kəmchätˈskē [key], city (1989 pop. 269,000), capital of Kamchatka Territory, Russian Far East. It is a major port and naval base on the Northern Sea Route, and there are shipyards an...

Bergen, town, Lower Saxony, Germany

(Encyclopedia)Bergen, town, Lower Saxony, N Germany, 13 mi (21 km) NW of Celle. Building materials are manufactured. A North Atlantic Treaty Organization base is outs...

Bizerte

(Encyclopedia)Bizerte bēzĕrtˈ [key], Arab. Banzart, city, N Tunisia, on the Mediterranean Sea. It is an ...

Persian Gulf Wars

(Encyclopedia)Persian Gulf Wars, two conflicts involving Iraq and U.S.-led coalitions in the late 20th and early 21st cent. The First Persian Gulf War, also known as the Gulf War, Jan.–Feb., 1991, was an armed co...