| 平菇多糖稀溶液行为的研究 |
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| 引用本文： | 郑昌仁,朱志敏,谷云乐,胡雷,傅庭治,欧惠春.平菇多糖稀溶液行为的研究[J].物理化学学报,1992,8(4):493-499. |
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| 作者姓名： | 郑昌仁 朱志敏 谷云乐 胡雷 傅庭治 欧惠春 |
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| 作者单位： | Nanjing Institute of Chemical Technology, Nanjing 210009; Department of Biology, Nanjing University |
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| 摘 要： | 平菇多糖属生物高分子, 文章对平菇多糖稀溶液性质进行了研究。实验系采用Elias浊点滴定法测定平菇多糖溶液的θ组成, 用快速动态膜渗透计和粘度法测定平菇多糖的数均分子量、维利系数与分子链的构型参数。探讨其在θ条件下的分子形态及用Tung函数法等处理分级数据, 从而获得平菇多糖的分子量分布。
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| 关 键 词： | 多糖 稀溶液 平菇 分子量 浊度滴定 |
| 收稿时间： | 1991-03-25 |
| 修稿时间： | 1991-11-26 |
STUDIES ON THE DILUTE SOLUTION BEHAVIOR OF POLYSACCHARIDE OF PLEURATU OSTRETUS |
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| Zheng Changren,Zhu Zhimin,Hu Lei,Cu Yunlo,Fu Tingzhi,Ou Huichun Nanjing Institute of Chemical Technology,Nanjing.STUDIES ON THE DILUTE SOLUTION BEHAVIOR OF POLYSACCHARIDE OF PLEURATU OSTRETUS[J].Acta Physico-Chimica Sinica,1992,8(4):493-499. |
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| Authors: | Zheng Changren Zhu Zhimin Hu Lei Cu Yunlo Fu Tingzhi Ou Huichun Nanjing Institute of Chemical Technology Nanjing |
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| Institution: | Nanjing Institute of Chemical Technology, Nanjing 210009; Department of Biology, Nanjing University |
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| Abstract: | The polysaccharide of pleuratu ostreatus was fractionated by repeated precipitation method. Modified Elias cloud-point titration method with an UV detecter was used to determine the cloud-point. It was found that water/acetone (83.5:16.5 by volume) is a θ-solvent for the polymer at 25 ℃. Number average molecular weights of all samples fractionated were characterized by rapid dynamic membrane osmometry and viscometry. The second virial coefficient A_2 decreases as the molecular weight in-creases. The relationship is A_2=2 slope (M_nRT)~(-1/2).The intrinsic viscosities were determined by capillary viscometry in θ-solvent. Thus and thus a mondispersed η]～M relationship has been obtained:η]_θ=0.124~(0.513)The unperturbed dimension ... |
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| Keywords: | Pleuratu ostreatus Polysaccharide Dilute solution Molecular weight Cloud-point titration |
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