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Carbohydr Res. 2003 Mar 14;338(6):525-34.

Isolation and characterization of O-acetylated glucomannans from aspen and birch wood.

Author information

1
Swedish Pulp and Paper Research Institute, STFI, Box 5604, SE-114 86, Stockholm, Sweden. anita.teleman@stfi.se <anita.teleman@stfi.se>

Abstract

O-acetylated glucomannans were isolated from aspen and birch wood employing two different procedures and thereafter subjected to carbohydrate analysis by NMR spectroscopy and MALDI mass spectrometry. In one of the isolation procedures, acetone-extracted aspen or birch wood meal was extracted with dimethyl sulfoxide and then with hot water. Fractionation of the hemicellulose-containing extracts by size-exclusion chromatography was subsequently performed. In the other procedure, fractional precipitation with ethanol was used to isolate glucomannans from lyophilized process water produced by mechanical pulping of aspen. The aspen and birch glucomannans are O-acetylated at the C-2 or C-3 position of some of the mannose residues (random distribution), with a degree of acetylation of approx 0.3. In both cases the degree of polymerization was approx 16, indicating that low-molecular mass fractions of the glucomannans in hardwood have been isolated here.

PMID:
12668108
DOI:
10.1016/s0008-6215(02)00491-3
[Indexed for MEDLINE]

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