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population I and II

(Encyclopedia)population I and II, in astronomy: see stellar populations. ...

oxidation and reduction

(Encyclopedia)oxidation and reduction, complementary chemical reactions characterized by the loss or gain, respectively, of one or more electrons by an atom or molecule. Originally the term oxidation was used to re...

acids and bases

(Encyclopedia)acids and bases, two related classes of chemicals; the members of each class have a number of common properties when dissolved in a solvent, usually water. Another theory that provides a very broad ...

permutations and combinations

(Encyclopedia)permutations and combinations: see probability. ...

orchestra and orchestration

(Encyclopedia)CE5 Typical seating plan of a symphony orchestra orchestra and orchestration, an orchestra is a musical ensemble of mixed instruments based on strings and winds, under the direction of a conductor...

visit and search

(Encyclopedia)visit and search: see search, right of. ...

party, political

(Encyclopedia)party, political, organization whose aim is to gain control of the government apparatus, usually through the election of its candidates to public office. Political parties take many forms, but their m...

Du Pont de Nemours, Pierre Samuel

(Encyclopedia)Du Pont de Nemours, Pierre Samuel pyĕr sämüĕlˈ dü pôN də nəmo͞orˈ [key], 1739–1817, French economist, one of the physiocrats. Early in his career he attracted the attention of François Q...

Williams, Eric

(Encyclopedia)Williams, Eric, 1911–81, prime minister of Trinidad and Tobago (1961–81). He attended Oxford and taught at Howard Univ. in Washington, D.C. (1939–53). Returning to Trinidad, he founded (1955) th...

Qian Zhongshu

(Encyclopedia)Qian Zhongshu or Ch'ien Chung-shu, 1910–98, Chinese writer and scholar, grad. Tsinghua Univ., Beijing (1933). After attending Oxford and the Sorbonne, he returned (1939) to China and taught at sever...