galactomannann.

Brit.

/ɡəˌlaktə(ʊ)ˈmanan/, U.S.

/ɡəˌlæktoʊˈmænæn/

Origin: A borrowing from German. Etymon: German Galaktomannan.

Etymology: < German †Galaktomannan (E. Schulze 1891, as Galacto-Mannan , in Berichte der Deutsch. Chem. Ges. 24 2286) < galacto- (in Galactose galactose n.) + Mannan mannan n.

Biochemistry.

Any of various polysaccharides found in plant gums (esp. guar gum), some of which are used as stabilizers in food.Galactomannans consist of a chain of mannose residues with varying numbers of galactosyl side groups (cf. mannan n.).

ΘΚΠ

the world > matter > chemistry > organic chemistry > carbohydrates > sugars > polysaccharides > [noun] > having mannose residues as constituents

mannan1895

galactomannan1897

1897 J. B. Lindsey & E. B. Holland in 9th Ann. Rep. Hatch Exper. Station (Mass. Agric. Coll.) 192 The coffee bean, date seed, palm and cocoanut cake proved the presence of galactan and mannan in liberal quantities, indicating the presence of a substance which might be termed galactomannan.

1912 C. A. Browne Handbk. Sugar Anal. xix. 593 Mannan,..either in its simple form or as one of the so-called ‘paired mannans’ (glucomannan, galactomannan, fructomannan, etc.), occurs in nearly all plants.

1950 Jrnl. Amer. Chem. Soc. 72 4634/1 Guar gum..is a galactomannan polysaccharide in which the ratio of d-mannose to d-galactose is 2:1.

2007 V. J. Morris in P. Belton Chem. Physics of Food vi. 176 Mixtures of xanthan with galactomannans such as carob or tara gum form thermoreversible gels under conditions for which the individual components alone do not gel.

This is a new entry (OED Third Edition, November 2010; most recently modified version published online March 2022).

单词	galactomannan
释义	galactomannann. Brit. /ɡəˌlaktə(ʊ)ˈmanan/, U.S. /ɡəˌlæktoʊˈmænæn/ Origin: A borrowing from German. Etymon: German Galaktomannan. Etymology: < German †Galaktomannan (E. Schulze 1891, as Galacto-Mannan , in Berichte der Deutsch. Chem. Ges. 24 2286) < galacto- (in Galactose galactose n.) + Mannan mannan n. Biochemistry. Any of various polysaccharides found in plant gums (esp. guar gum), some of which are used as stabilizers in food.Galactomannans consist of a chain of mannose residues with varying numbers of galactosyl side groups (cf. mannan n.). ΘΚΠ the world > matter > chemistry > organic chemistry > carbohydrates > sugars > polysaccharides > [noun] > having mannose residues as constituents mannan1895 galactomannan1897 1897 J. B. Lindsey & E. B. Holland in 9th Ann. Rep. Hatch Exper. Station (Mass. Agric. Coll.) 192 The coffee bean, date seed, palm and cocoanut cake proved the presence of galactan and mannan in liberal quantities, indicating the presence of a substance which might be termed galactomannan. 1912 C. A. Browne Handbk. Sugar Anal. xix. 593 Mannan,..either in its simple form or as one of the so-called ‘paired mannans’ (glucomannan, galactomannan, fructomannan, etc.), occurs in nearly all plants. 1950 Jrnl. Amer. Chem. Soc. 72 4634/1 Guar gum..is a galactomannan polysaccharide in which the ratio of d-mannose to d-galactose is 2:1. 2007 V. J. Morris in P. Belton Chem. Physics of Food vi. 176 Mixtures of xanthan with galactomannans such as carob or tara gum form thermoreversible gels under conditions for which the individual components alone do not gel. This is a new entry (OED Third Edition, November 2010; most recently modified version published online March 2022). < n.1897
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