title: Isolation and NMR characterisation of a (4-O-methyl-D-glucurono)-D-xylan from sugar beet pulp.
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.
authors.affiliation: Centre de Recherches sur les Macromolécules Végétales, CNRS, and Université Joseph Fourier, Grenoble, France.
authors.forename: E
authors.initials: E
authors.lastname: Dinand
authors.forename: M R
authors.initials: MR
authors.lastname: Vignon
mesh_terms: D002482:Cellulose / Q000737:chemistry; D019663:Chenopodiaceae / Q000737:chemistry*; D006868:Hydrolysis; D009682:Magnetic Resonance Spectroscopy; D014269:Trifluoroacetic Acid; D014990:Xylans / Q000737:chemistry* / Q000302:isolation & purification
chemical_list: D014990:Xylans; D002482:Cellulose; C044967:4-O-methyl glucuronoxylan; D014269:Trifluoroacetic Acid