Rheological properties of the polysaccharide-protein complex from longan (Dimocarpus longan Lour.) pulp

文献类型： 外文期刊

第一作者： Liu, Xingxun

作者： Liu, Xingxun;Liu, Liya;Zhou, Sumei;Wang, Changsheng;Luo, Yongyue

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期刊名称：RSC ADVANCES （ 影响因子：3.361； 五年影响因子：3.39 ）

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收录情况： SCI

摘要： Crude longan polysaccharide (CLP) was extracted from longan (Dimocarpus longan Lour.) pulp. Its chemical composition was determined by chemical analysis, high-performance liquid chromatography (HPLC) and gel permeation chromatography (GPC). The flow and viscoelastic behavior of a CLP solution was investigated by carrying out steady shear and small amplitude oscillatory shear (SAOS) experiments, respectively. The results showed that the CLP solution was a polysaccharide-protein complex. The rheology experiments showed that it underwent a pseudoplastic flow at various shear rates (0.1-100 s(-1)). Both the flow behavior and viscoelastic behavior of CLP were influenced by cations such as Na+ and Ca2+. Increases of the apparent viscosity, G' and G '' accompanied the addition of Na+ and Ca2+. A polysaccharide named LPB-2-M was obtained from isolation and purification of CLP; this polysaccharide was shown to consist of a single component due to the narrow molecular weight distribution, which was evident by the polydispersity index (PDI = M-w/M-n). The average molecular weight (M-w) of LPB-2-M was 80 kDa.

分类号： O6

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