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Nuclear magnetic resonance spectroscopy of polysaccharides

CARBON-13 NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY OF POLYSACCHARIDES... [Pg.13]

P. A. J. Gorin, Carbon-13 nuclear magnetic resonance spectroscopy of polysaccharides, Adv. Carbohydr. Chem. Biochem., 38 (1981) 13-104. [Pg.198]

The discovery of enzymes that could selectively break down hyaluronan opened the door for the establishment of the polysaccharide molecule s chemical structure. In those days, a powerful tool for analysing the structure of polysaccharides such as nuclear magnetic resonance spectroscopy NMR was not known. At the present time, NMR makes it possible to determine the monosaccharide biopolymer residue s composition, centres for substitution reactions, sequence and three-dimensional structure. [Pg.2]

The advent of studies of polysaccharides by carbon-13 nuclear magnetic resonance (13C-n.m.r.) spectroscopy coincided, not surprisingly,... [Pg.13]

Nuclear magnetic resonance (NMR) spectroscopy is a very powerful tool for analyzing the conformation and molecular architecture of carbohydrate molecules. Both one- and two-dimensional (ID and 2D) methodologies have provided valuable information about small and large molecules, ranging from the anomeric configuration of a monosaccharide to the sequence of monosaccharide residues that constitute an oligo- or polysaccharide. [Pg.63]

A variety of spectroscopic techniques have been applied to DOC isolated from seawater by cross-flow ultrafiltration or adsorption onto XAD resins. The two techniques isolate very different organic fractions from seawater. Hydrophobic fractions (such as marine humic material) are isolated on XAD resins [48], whereas the organic matter extracted by ultrafiltration is retained primarily on the basis of its molecular size and shape [49], resulting in isolates rich in nitrogen and carbohydrates (polysaccharides). Nuclear magnetic resonance (NMR) spectroscopy has proven successful in distinguishing between the specific structures of XAD-bound humics and the carbohydrates concentrated into colloidal size fractions. [Pg.41]

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See also in sourсe #XX -- [ Pg.21 , Pg.501 ]



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