Isolation and Characterisation of an Acetylated Glucomannan from Pine (Pinus silvestris L.).

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Abstract
A mixture of polysaccharides isolated from pine holo-cellulose was fractionated under conditions where acetyl groups are stable. A pure glucomannan was obtained with an acetyl content of 5.95%, corresponding to a DS of 0.24. Periodate oxidation studies on the chromannan showed that almost all of the acetyl groups are linked to carbon atoms 2 or 3 of the mannose residues. An almost pure glucurono-arabinoxylan isolated from the holocellulose dimethyl sulfoxide extract contained only traces of acetyl groups. It seems likely therefore, that most of the acetyl groups in pine wood are linked to the glucomannan fraction.