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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. ...

Paston Letters

(Encyclopedia)Paston Letters, collection of personal and business correspondence, mostly among members of the Paston family of Norfolk, England. The letters cover the years from 1422 to 1529, together with deeds an...

Nzinga

(Encyclopedia)Nzinga or Njinga, c.1583–1663, queen of the Mbundu people in what is now Angola. In 1622, she represented her brother, King Mbande of Ndongo, in talks with the Portuguese, who had established a fort...

Daejeon

(Encyclopedia)Daejeon or Taejon dīˈjônˈ [key], city, capital of South Chungcheong (Chungchong) prov., central ...

Cheonan

(Encyclopedia)Cheonan or Chonan chônˈänˈ [key], city, South Chungcheong prov., W South Korea. It is a railroad hub ...

Chemulpo

(Encyclopedia)Chemulpo: see Incheon, Korea.