1. The process of extinguishing, removing, or diminishing a physical property such as heat or light; e.g., the cooling of a hot metal rapidly by plunging it into water or oil. 2. In beta liquid scintillation counting, the shifting of the energy spectrum from a true to a lower energy; it is caused by a variety of interfering materials in the counting solution, including foreign chemicals and coloring agents. 3. The process of stopping a chemical or enzymatic reaction. [M. E. quenchen, fr. O.E. acwencan]
- fluorescence q. a technique used in investigations dealing with binding of antigens (haptens) by purified antibodies, applicable in cases in which the bound antigen (hapten) absorbs (quenches) light emitted during fluorescence of protein (antibody) excited by ultraviolet light.

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quench·ing (kwenchґing) 1. extinguishing, suppressing, or diminishing a physical property, as the rapid chilling of a hot metal by plunging it into cold liquid. 2. in biochemistry, decrease of fluorescence from an excited molecule by interference that reduces the fluorescence intensity, such as deexcitation of the fluorescent molecule by collision with other molecules, absorption of fluorescent emission by the surrounding medium, or a decrease or shift in wavelength of fluorescence due to chemical interaction of the fluorescent molecule with other molecules. 3. in liquid scintillation counting, interference with generation or propagation of light energy from the sample, decreasing the counting efficiency of the detector. 4. the termination of secondary and subsequent ionizations in a detector to give it time to become sensitive again.

Medical dictionary. 2011.

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  • Quenching — Quenching. См. Закалка. (Источник: «Металлы и сплавы. Справочник.» Под редакцией Ю.П. Солнцева; НПО Профессионал , НПО Мир и семья ; Санкт Петербург, 2003 г.) …   Словарь металлургических терминов

  • quenching — Rapid cooling, as by immersion in oil or water, of a metal object from the high temperature at which it is shaped. Quenching is usually done to maintain mechanical properties that would be lost with slow cooling. It is commonly applied to steel… …   Universalium

  • quenching — rapid cooling from a high temperature by immersion in a liquid bath of oil or water. Molten salts may also be used. hot quenching interrupted quenching pot quenching …   Mechanics glossary

  • quenching — GLOSSARY OF VOLCANIC TERMS The rapid cooling of magma to form glass (Batiza and White, 2000, p. 361). Fuel coolant interactions commonly lead to quenching. Abrupt quenching may cause a rapid volume decrease which leads to fragmentation of the… …   Glossary of volcanic terms

  • Quenching — Quench Quench, v. t. [imp. & p. p. {Quenched}; p. pr. & vb. n. {Quenching}.] [OE. quenchen, AS. cwencan in [=a]cwencan, to extinguish utterly, causative of cwincan, [=a]cwincan, to decrease, disappear; cf. AS. cw[=i]nan, [=a]cw[=i]nan, to waste… …   The Collaborative International Dictionary of English

  • Quenching — Der Quench oder das Quenchen bzw. Quenching (von englisch to quench = „abfangen“, „löschen“, „tilgen“) bezeichnet: einen optischen Effekt, speziell in der Fluoreszenzspektroskopie, siehe Fluoreszenzlöschung in der Kryotechnik den Übergang eines… …   Deutsch Wikipedia

  • Quenching — Quen|ching [ kwɛntt̮ʃɪŋ ], das; s [zu engl. to quench = löschen] (Chemie): das Abschrecken von heißen Reaktionsprodukten mit Wasser, Öl, Gas u. a., um die chemische Reaktion zum Stillstand zu bringen. * * * Quenching   [ kwentʃɪȖ; englisch to… …   Universal-Lexikon

  • quenching — grūdinimas statusas T sritis chemija apibrėžtis Įkaitinimas iki tam tikros temperatūros, laikymas joje ir greitas ataušinimas. atitikmenys: angl. chilling; hardening; heat hardening; quenching; toughening rus. закалка …   Chemijos terminų aiškinamasis žodynas

  • quenching — kvenčingas statusas T sritis chemija apibrėžtis Staigus reakcijos sustabdymas šaltu jos produkto srautu (arba pats srautas). atitikmenys: angl. quenching rus. квенчинг …   Chemijos terminų aiškinamasis žodynas

  • quenching — įšaldymas statusas T sritis fizika atitikmenys: angl. freezing; quenching vok. Einfrieren, n rus. замораживание, n pranc. congélation, f …   Fizikos terminų žodynas

  • quenching — gesinimas statusas T sritis fizika atitikmenys: angl. quenching vok. Löschen, n; Löschung, f; Tilgung, f rus. гашение, n; тушение, n pranc. extinction, f …   Fizikos terminų žodynas

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