catalysis


catalysis
The effect that a catalyst exerts upon a chemical reaction. [G. katalysis, dissolution]
- contact c. a process wherein the catalyst is a solid and the catalyzed reaction is produced after the reactants (usually gases) have made contact with the solid.
- surface c. c. at the surface of a solid particle or interface, or of a macromolecule.

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ca·tal·y·sis kə-'tal-ə-səs n, pl -y·ses -.sēz a change and esp. increase in the rate of a chemical reaction induced by a catalyst

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ca·tal·y·sis (kə-talґə-sis) [Gr. katalysis dissolution] increase in the velocity of a chemical reaction or process produced by the presence of a substance that is not consumed in the net chemical reaction or process; negative catalysis denotes the slowing down or inhibition of a reaction or process by the presence of such a substance.

Medical dictionary. 2011.

Look at other dictionaries:

  • Catalysis — Ca*tal y*sis, n.; pl. {Catalyse}.[ML., fr. Gr. ? dissolution, fr. ? to destroy, dissolve; kata down, wholly + ? to loose.] [1913 Webster] 1. Dissolution; degeneration; decay. [R.] [1913 Webster] Sad catalysis and declension of piety. Evelyn.… …   The Collaborative International Dictionary of English

  • catalysis — (n.) 1650s, dissolution, from Gk. katalysis dissolution, a dissolving (of governments, military units, etc.), from katalyein to dissolve, from kata down (or completely ), see CATA (Cf. cata ), + lyein to loosen (see LOSE (Cf. lose)) …   Etymology dictionary

  • catalysis — ► NOUN ▪ the acceleration of a chemical reaction by a catalyst. DERIVATIVES catalytic adjective. ORIGIN Greek katalusis dissolution …   English terms dictionary

  • catalysis — [kə tal′ə sis] n. pl. catalyses [kə tal′əsēz΄] [ModL < Gr katalysis, dissolution: see CATA & LYSIS] the speeding up or, sometimes, slowing down of the rate of a chemical reaction caused by the addition of some substance that does not undergo a …   English World dictionary

  • Catalysis — Catalyst redirects here. For other uses, see Catalyst (disambiguation). Solid heterogeneous catalysts such as in automobile catalytic converters are plated on structures designed to maximize their surface area …   Wikipedia

  • catalysis — catalytic /kat l it ik/, adj., n. catalytical, adj. catalytically, adv. /keuh tal euh sis/, n., pl. catalyses / seez /. 1. Chem. the causing or accelerating of a chemical change by the addition of a catalyst. 2. an action between two or more… …   Universalium

  • catalysis — [[t]kətæ̱lɪsɪs[/t]] N UNCOUNT Catalysis is the speeding up of a chemical reaction by adding a catalyst to it. [TECHNICAL] …   English dictionary

  • catalysis — katalizė statusas T sritis Standartizacija ir metrologija apibrėžtis Reakcijos greitinimas katalizatoriumi. atitikmenys: angl. catalysis vok. Katalyse, m rus. катализ, m pranc. catalyse, f …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • catalysis — katalizė statusas T sritis chemija apibrėžtis Reakcijos greitinimas katalizatoriumi. atitikmenys: angl. catalysis rus. катализ …   Chemijos terminų aiškinamasis žodynas

  • catalysis — katalizė statusas T sritis fizika atitikmenys: angl. catalysis vok. Katalyse, f rus. катализ, m pranc. catalyse, f …   Fizikos terminų žodynas


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