racemizationn.

Brit.

/ˌrasᵻmʌɪˈzeɪʃn/, U.S.

/ˌræsəmaɪˈzeɪʃ(ə)n/,

/ˌræsəməˈzeɪʃ(ə)n/

Forms: 1800s– racemisation, 1900s– racemization.

Origin: Formed within English, by derivation. Etymons: racemic adj., -ization suffix.

Etymology: < racem- (in racemic adj.) + -ization suffix. Compare French racémisation (1899 or earlier). Compare slightly later racemize v., racemized adj.

Chemistry.

Conversion of an optically active substance into a racemic (and so optically inactive) form.

ΘΚΠ

the world > matter > chemistry > isomerism > [noun] > stereo-isomerism > optical isomerism > racemism > racemization

racemization1895

1895 A. Eiloart in Sci. Progress 3 503 If the temperature of racemisation² lies below the ordinary temperature, the difficulty of separating the active isomers is accounted for. [Note] ²This term is used to indicate the formation of the inactive aggregate from two isomers of opposite activity.

1927 Arnall & Hodges Theoret. Org. Chem. II. vi. 59 Pinene and limonene undergo racemisation on simple heating.

1950 R. C. Fuson Adv. Org. Chem. vi. 111 When l-2 iodoöctane is treated with sodium iodide in acetone solution..racemization occurs.

1975 Whig-Standard (Kingston, Ont.) 5 Sept. 7/5 The ages were obtained by the so-called racemization method. This records the extent to which molecules of aspartic acid in a specimen have altered their configuration from the form that occurs in living bones to its mirror image.

1996 New Scientist 18 May 21/2 In 1994, researchers..noted that the rate of amino acid racemisation seems to correlate with the rate of DNA breakdown by depurination.

This entry has been updated (OED Third Edition, June 2008; most recently modified version published online March 2022).

单词	racemization
释义	racemizationn. Brit. /ˌrasᵻmʌɪˈzeɪʃn/, U.S. /ˌræsəmaɪˈzeɪʃ(ə)n/, /ˌræsəməˈzeɪʃ(ə)n/ Forms: 1800s– racemisation, 1900s– racemization. Origin: Formed within English, by derivation. Etymons: racemic adj., -ization suffix. Etymology: < racem- (in racemic adj.) + -ization suffix. Compare French racémisation (1899 or earlier). Compare slightly later racemize v., racemized adj. Chemistry. Conversion of an optically active substance into a racemic (and so optically inactive) form. ΘΚΠ the world > matter > chemistry > isomerism > [noun] > stereo-isomerism > optical isomerism > racemism > racemization racemization1895 1895 A. Eiloart in Sci. Progress 3 503 If the temperature of racemisation² lies below the ordinary temperature, the difficulty of separating the active isomers is accounted for. [Note] ²This term is used to indicate the formation of the inactive aggregate from two isomers of opposite activity. 1927 Arnall & Hodges Theoret. Org. Chem. II. vi. 59 Pinene and limonene undergo racemisation on simple heating. 1950 R. C. Fuson Adv. Org. Chem. vi. 111 When l-2 iodoöctane is treated with sodium iodide in acetone solution..racemization occurs. 1975 Whig-Standard (Kingston, Ont.) 5 Sept. 7/5 The ages were obtained by the so-called racemization method. This records the extent to which molecules of aspartic acid in a specimen have altered their configuration from the form that occurs in living bones to its mirror image. 1996 New Scientist 18 May 21/2 In 1994, researchers..noted that the rate of amino acid racemisation seems to correlate with the rate of DNA breakdown by depurination. This entry has been updated (OED Third Edition, June 2008; most recently modified version published online March 2022). < n.1895
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