Journal
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
Volume 45, Issue 4, Pages 359-363Publisher
ELSEVIER
DOI: 10.1016/j.ijbiomac.2009.07.008
Keywords
Dendrobium nobile Lindl.; Polysaccharide; Monosaccharides composition; Structure; Free radicals; Antioxidant activities
Funding
- National Spark Program Plan [2008GA810003]
- Sichuan Public-spirited [2008NG0007]
- Sichuan Scientific and Technological [2006Z08-014]
- Sichuan Province Science and Technology Program [2006Z08-058]
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A water-soluble polysaccharice (DNP), isolated from the aqueous extracts of the stem of Dendrobium nobile Lindl., was found to have an average molecular weight (Mw) of about 8.76 x 10(4) Da. Monosaccharides analysis revealed that DNP was composed of rhamnose, arabinose, xylose, mannose, glucose and galactose in a molar ratio of 1.00:2.80:2.20:30.76:117.96:31.76. The evaluation of antioxidant activity in vitro revealed that DNP is a novel potential antioxidant. The NMR spectra suggested that the main structure of DNP was possible as (C) 2009 Elsevier B.V. All rights reserved.
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