College of Life Sciences, Sichuan University, Chengdu 610064, PR China.
Int J Biol Macromol. 2009 Nov 1;45(4):359-63. doi: 10.1016/j.ijbiomac.2009.07.008. Epub 2009 Jul 28.
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).
从铁皮石斛茎的水提物中分离得到一种水溶性多糖（DNP），其重均分子量（Mw）约为 8.76×10(4)Da。单糖分析表明，DNP 由鼠李糖、阿拉伯糖、木糖、甘露糖、葡萄糖和半乳糖组成，摩尔比为 1.00:2.80:2.20:30.76:117.96:31.76。体外抗氧化活性评价表明，DNP 是一种新型潜在抗氧化剂。NMR 谱表明，DNP 的主要结构可能与铁皮石斛中预测的 DNP 主要结构（图 5）一致。
