THE MOLECULAR CHARACTERIZATION OF THE POLYSACCHARIDE GUM FROM LANGUCULARIA-RACEMOSA

Citation
Gl. Depinto et al., THE MOLECULAR CHARACTERIZATION OF THE POLYSACCHARIDE GUM FROM LANGUCULARIA-RACEMOSA, Carbohydrate polymers, 35(3-4), 1998, pp. 205-213
Citations number
23
Categorie Soggetti
Chemistry Applied","Chemistry Inorganic & Nuclear","Polymer Sciences
Journal title
ISSN journal
01448617
Volume
35
Issue
3-4
Year of publication
1998
Pages
205 - 213
Database
ISI
SICI code
0144-8617(1998)35:3-4<205:TMCOTP>2.0.ZU;2-7
Abstract
A polysaccharide isolated from the exudate of Laguncularia racemosa, ( Combretaceae) has been investigated using Smith-degradation, methylati on analysis, hydrolysis, and C-13-NMR spectroscopy. The backbone of th e structure is constituted of uronic acids, galactose and rhamnose. A complex pentasaccharide, constituted of these sugars, was isolated fro m the original gum and degradation products. This oligosaccharide is, probably, the main structural feature of the investigated polysacchari de. On the other hand, according to chemical and spectral evidence rha mnose is present, predominantly as internal residues. Arabinosyl (pyra nosyl and furanosyl) residues and some galactosyl, glucuronic acid and 4-O-methyl-alpha-D-glucuronic acid residues are located in branches. (C) 1998 Elsevier Science Ltd. All rights reserved.