In vitro antioxidant activities of a water-soluble polysaccharide derived from Dendrobium nobile Lindl. extracts |
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| Authors: | AoXue Luo XingJin He SongDong Zhou YiJun Fan Tao He Ze Chun |
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| Institution: | aCollege of Life Sciences, Sichuan University, Chengdu 610064, PR China;bChengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China;cSichuan Agriculture University Dujiangyan Campus, Dujiangyan 611830, PR China |
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| Abstract: | A water-soluble polysaccharide (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 × 104 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 |
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| Keywords: | Dendrobium nobile Lindl Polysaccharide Monosaccharides composition Structure Free radicals Antioxidant activities |
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