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Structure-antioxidant relationships of sulfated galactomannan from guar gum.
- Source :
-
International journal of biological macromolecules [Int J Biol Macromol] 2010 Jan 01; Vol. 46 (1), pp. 59-66. Date of Electronic Publication: 2009 Oct 28. - Publication Year :
- 2010
-
Abstract
- Sulfated polysaccharides exerted potential biological property which was relative to degree of sulfation (DS), M(w), substitution position and chain conformation. In the present study, commercial guar gum was purified and its sulfated derivates with different DS and M(w) were synthesized. FT-IR and 13C NMR analysis indicated that C-6 substitution was predominant in sulfated samples compared with other positions. In the sulfation reaction, a sharp decrease in M(w) was observed. The d(f) values from 1.92 to 2.85 indicated that the -SO3H groups led to the relatively expanded conformation of sulfated polysaccharides. Antioxidant assays showed that sulfated polysaccharides had better antioxidant activities. The data obtained in in vitro models indicated that high DS and low M(w) showed the best antioxidant capacities.<br /> (Crown Copyright 2009. Published by Elsevier B.V. All rights reserved.)
- Subjects :
- Biphenyl Compounds metabolism
Carbohydrate Conformation
Chromatography, Gel
Free Radical Scavengers pharmacology
Hydroxyl Radical metabolism
Ions
Iron metabolism
Iron Chelating Agents pharmacology
Magnetic Resonance Spectroscopy
Molecular Weight
Oxidation-Reduction drug effects
Picrates metabolism
Spectroscopy, Fourier Transform Infrared
Structure-Activity Relationship
Superoxides metabolism
Antioxidants pharmacology
Galactans chemistry
Mannans chemistry
Mannans pharmacology
Plant Gums chemistry
Sulfuric Acid Esters chemistry
Sulfuric Acid Esters pharmacology
Subjects
Details
- Language :
- English
- ISSN :
- 1879-0003
- Volume :
- 46
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- International journal of biological macromolecules
- Publication Type :
- Academic Journal
- Accession number :
- 19836415
- Full Text :
- https://doi.org/10.1016/j.ijbiomac.2009.10.004