Isolation and NMR characterisation of a (4-O-methyl-D-glucurono)-D-xylan from sugar beet pulp |
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Authors: | Dinand E Vignon M R |
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Affiliation: | Centre de Recherches sur les Macromolécules Végétales, CNRS, and Université Joseph Fourier, Grenoble, France. |
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Abstract: | Stable aqueous suspensions of purified and homogenised sugar beet pulp (SBP) cellulose were subjected to various TFA treatments which induced a flocculation of the suspension and the release of a number of polysaccharides. Among these, a 4-O-methyl glucuronoxylan was isolated and characterized by 1H and 13C NMR spectroscopy. In this polysaccharide the molar proportions of D-Xyl and 4-O-Me-D-GlcA were found to be 7:1. The presence of a glucuronoxylan at the surface of the cellulose microfibrils is very likely involved in the stability of the suspensions. To our knowledge, the presence of a 4-O-methyl-glucuronoxylan in the sugar beet cells has not been described previously. |
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