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chromatography

(Encyclopedia)chromatography krōˌmətŏgˈrəfē [key], resolution of a chemical mixture into its component compounds by passing it through a system that retards each compound to a varying degree; a system capabl...

atomic clock

(Encyclopedia)atomic clock, electric or electronic timekeeping device that is controlled by atomic or molecular oscillations. A timekeeping device must contain or be connected to some apparatus that oscillates at a...

Whitley Bay

(Encyclopedia)Whitley Bay, town (1991 pop. 36,040), North Tyneside metropolitan district, NE England, on the North Sea. Formerly the urban district of Whitley and Monkseaton, Whitley Bay was chartered as a municipa...

Darmstadt

(Encyclopedia)Darmstadt därmˈshtät [key], city, Hesse, central Germany. It is a commercial, industrial, and ...

Creusa

(Encyclopedia)Creusa krēo͞oˈsə [key], in Greek mythology. 1 Daughter of Erechtheus and wife of Xuthus. Her sons, Achaeus by Xuthus, and Ion by Xuthus or Apollo, are the ancestors of the Achaeans and the Ionians...

Drancy

(Encyclopedia)Drancy dräNsēˈ [key], city, Seine–Saint Denis dept., N central France. An industrial sub...

Kolwezi

(Encyclopedia)Kolwezi kōlwĕzˈē [key], city (1984 pop. 416,122), Haut-Katanga prov., SE Congo (Kinshasa). It is a center for copper and cobalt mining. There are copper-ore concentration plants, a zinc refinery, ...

Majdanek

(Encyclopedia)Majdanek or Maidanek mīdäˈnĕk [key], village, Lubelskie prov., SE Poland, a suburb of Lublin. The Germans established and operated a concentration camp there in World War II. An estimated 170,000 ...

hydrocyanic acid

(Encyclopedia)hydrocyanic acid hīˌdrōsīănˈĭk [key]: see hydrogen cyanide. ...

neutralization

(Encyclopedia)neutralization, chemical reaction, according to the Arrhenius theory of acids and bases, in which a water solution of acid is mixed with a water solution of base to form a salt and water; this reactio...