Structural features of alkali-soluble acidic xylans isolated from the bark of ceiba-pentandra var indica

Shantha Raju, T. and Channe Gowda, D. and Anjaneyalu, Y. V. (1989) Structural features of alkali-soluble acidic xylans isolated from the bark of ceiba-pentandra var indica. Carbohydrate Research, 191 (2). pp. 333-341.

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Abstract

The insoluble residue of C. pentandra var. indica, obtained by delignification of the bark, gave an alkali-soluble polysaccharide fraction containing l-fucose, d-xylose, l-arabinose, d-glucose, d-galactose, d-glucuronic acid, and 4-O-methyl-d-glucuronic acid. Fractional precipitation with Cetavlon and barium hydroxide afforded three hemicellulose-type acidic xylans that differed in the contents of uronic acid and mol. wts., and a fucose-containing acidic polysaccharide. Methylation analysis of the carboxyl-reduced acidic xylans suggested a (1→2)- or (1→4)-linked backbone and different patterns of substitution. Partial hydrolysis of one acidic xylan gave 4-O-β-d-xylopyranosyl-d-xylose and 2-O-(α-d-glucopyranosyluronic acid)-d-xylose. The oxidation of this polysaccharide with chromium trioxide and periodate was studied.

Item Type:	Article
Uncontrolled Keywords:	Biochemistry & Molecular Biology; Chemistry, Applied; Chemistry, Organic
Subjects:	C Chemical Science > Chemistry
Divisions:	Department of > Chemistry
Depositing User:	Dr Raju C
Date Deposited:	21 Jan 2021 10:00
Last Modified:	29 Jun 2022 10:17
URI:	http://eprints.uni-mysore.ac.in/id/eprint/14220

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