TY - JOUR
T1 - Structural features of alkali-soluble acidic xylans isolated from the bark of Ceiba pentandra var. indica
AU - Shantha Raju, T.
AU - Gowda, Channe
AU - Anjaneyalu, Yernool V.
PY - 1989/8/15
Y1 - 1989/8/15
N2 - 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.
AB - 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.
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U2 - 10.1016/0008-6215(89)85076-1
DO - 10.1016/0008-6215(89)85076-1
M3 - Article
AN - SCOPUS:0343329225
SN - 0008-6215
VL - 191
SP - 333
EP - 341
JO - Carbohydrate Research
JF - Carbohydrate Research
IS - 2
ER -