Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10375866 | Food Hydrocolloids | 2005 | 7 Pages |
Abstract
Spondias purpurea var. lutea (Anacardiaceae) trees located in Venezuela, South America, produce a clear gum very soluble in water. The polysaccharide, from this gum, contains galactosyl, arabinosyl, xylosyl, rhamnosyl and uronic acid residues. Degraded gums A and B were prepared by mild acid hydrolysis and Smith degradation, respectively. Application of 1D- and 2D-NMR spectroscopy to the original gum and its degraded products, in combination with chemical data, led to confirm that the structure of the original polysaccharide contains 3-O- and 6-O-galactosyl residues, terminal and 3-O-α-l-arabinofuranosyl, terminal rhamnosyl residues and uronic acids, represented by β-d-glucuronic acid and its 4-O-methyl derivative. It was demonstrated that 2D-NMR spectroscopy is a good tool for structural elucidation of complex heteropolysaccharides.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Colloid and Surface Chemistry
Authors
Omaira Gutiérrez de G, Maritza MartıÌnez, Lilian Sanabria, Gladys León de Pinto, J.Manuel Igartuburu,