In vitro antioxidant activities of a water-soluble polysaccharide derived from Dendrobium nobile Lindl. extracts.
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 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 the predicted main structure of DNP from Dendrobium nobile, (fig. 5).
Luo
AoXue
A
College of Life Sciences, Sichuan University, Chengdu 610064, PR China.
He
Xingjin
X
Zhou
SongDong
S
Fan
Yijun
Y
He
Tao
T
Chun
Ze
Z
D031667:Dendrobium / Q000737:chemistry*; D016166:Free Radical Scavengers / Q000737:chemistry* / Q000302:isolation & purification; D005609:Free Radicals / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D008970:Molecular Weight; D009005:Monosaccharides / Q000032:analysis; D010936:Plant Extracts / Q000737:chemistry*; D011134:Polysaccharides / Q000737:chemistry* / Q000302:isolation & purification; D012995:Solubility; D013055:Spectrophotometry, Infrared; D014867:Water / Q000737:chemistry*
D016166:Free Radical Scavengers; D005609:Free Radicals; D009005:Monosaccharides; D010936:Plant Extracts; D011134:Polysaccharides; D014867:Water