galacturonicadj.

Brit.

/ɡəˌlaktʃəˈrɒnɪk/, U.S.

/ɡəˌlæktʃəˈrɑnɪk/

Origin: Formed within English, by compounding; modelled on a German lexical item. Etymons: galactose n., glycuronic adj.

Etymology: < galact- (in galactose n.) + -uronic (in glycuronic adj.), after German Galacturonsäure galacturonic acid (F. Ehrlich 1917, in Chemiker-Zeitung 7 Mar. 197/2; now also Galakturonsäure ). Compare slightly later uronic adj.

Chemistry.

galacturonic acid, a crystalline acid which is the uronic acid of galactose, and is the subunit from which pectin is composed.Formula: C₆H₁₀O₇.

ΚΠ

1917 Chem. Abstr. 11 2583 E[hrlich] isolated from the decompn. products of pectin d- galacturonic acid, a new isomer of glucuronic acid of the animal kingdom, and the d-form of E. Fischer's racemic aldehyde mucic acid.

1930 Jrnl. Biol. Chem. 86 491 Flax pectin..is made up of 61 per cent of galacturonic acid, and the pectic acid from orange peelings..is composed of 73.7 per cent of galacturonic acid.

1950 R. M. Smock & A. M. Neubert Apples & Apple Products xii. 341 A very slight increase in titratable acidity resulted,..presumably from the liberation of free galacturonic acid from the pectin by the enzymes.

1995 New Scientist 8 Apr. 23/3 Single molecules of galacturonic acid—the building block of pectins—would be relatively easy to detect.

This entry has been updated (OED Third Edition, November 2010; most recently modified version published online March 2022).

单词	galacturonic
释义	galacturonicadj. Brit. /ɡəˌlaktʃəˈrɒnɪk/, U.S. /ɡəˌlæktʃəˈrɑnɪk/ Origin: Formed within English, by compounding; modelled on a German lexical item. Etymons: galactose n., glycuronic adj. Etymology: < galact- (in galactose n.) + -uronic (in glycuronic adj.), after German Galacturonsäure galacturonic acid (F. Ehrlich 1917, in Chemiker-Zeitung 7 Mar. 197/2; now also Galakturonsäure ). Compare slightly later uronic adj. Chemistry. galacturonic acid, a crystalline acid which is the uronic acid of galactose, and is the subunit from which pectin is composed.Formula: C₆H₁₀O₇. ΚΠ 1917 Chem. Abstr. 11 2583 E[hrlich] isolated from the decompn. products of pectin d- galacturonic acid, a new isomer of glucuronic acid of the animal kingdom, and the d-form of E. Fischer's racemic aldehyde mucic acid. 1930 Jrnl. Biol. Chem. 86 491 Flax pectin..is made up of 61 per cent of galacturonic acid, and the pectic acid from orange peelings..is composed of 73.7 per cent of galacturonic acid. 1950 R. M. Smock & A. M. Neubert Apples & Apple Products xii. 341 A very slight increase in titratable acidity resulted,..presumably from the liberation of free galacturonic acid from the pectin by the enzymes. 1995 New Scientist 8 Apr. 23/3 Single molecules of galacturonic acid—the building block of pectins—would be relatively easy to detect. This entry has been updated (OED Third Edition, November 2010; most recently modified version published online March 2022). < adj.1917
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