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Characterization ofAnacardiumoccidentale exudate polysaccharide by Regina C. M. de Paula; Frank Heatley; Peter M. Budd is a Materials Science article available to read on EtoBox.

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The composition, structure and molar mass distribution of Anacardium occidentale exudate polysaccharide of Brazilian origin was investigated. The composition from gasÈliquid chromatography (GLC) and 13C NMR was 72% b-D-galactopyranose, 14% a-D-glucopyranose, 4É6% a-L-arabinofuranose, 3É2% a-L-rhamnopyranose and 4É5% b-D-glucuronic acid. A thorough analysis of high resolution 13C NMR spectra from intact, partially hydrolysed and Smithdegraded polysaccharide enabled reliable chemical shift assignments to be made, and indicated the presence of three types of unit within the branched galactan core : linked at C-1 and C-3, at C-1 and C-6, and at C-1, C-3 and C-6. The polysaccharide was fractionated with respect to molar mass using water/ethanol as a solvent/non-solvent system. The polysaccharide and fractions were characterized by gel permeation chromatography (GPC), intensity light scattering, dilute solution viscometry and sedimentation velocity. The intrinsic viscosity in 0É1 M aqueous NaCl at 25¡C was found to depend on molar mass according to : [g]/(cm3 g~1) \ 0É052M0Õ42. The molar mass distribution for the whole polysaccharide, determined by GPC using a universal calibration, exhi

Who reads Characterization ofAnacardiumoccidentale exudate polysaccharide?

Author

Regina C. M. de Paula; Frank Heatley; Peter M. Budd

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0959-8103)

Published

1998

Language

EN

Field

Materials Science (Physical Sciences)