| 蔗渣膳食纤维化学结构的研究─-PCF3和PCF4组分的结构模型 |
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| 引用本文： | 郑建仙,耿立萍.蔗渣膳食纤维化学结构的研究─-PCF3和PCF4组分的结构模型[J].食品与发酵工业,1997(3). |
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| 作者姓名： | 郑建仙 耿立萍 |
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| 作者单位： | 华南理工大学轻工食品学院!广州，510641 |
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| 基金项目： | 中国博士后科学基金，广东省自然科学基金，广东省博士后科学基金 |
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| 摘 要： | 利用lmol／LNaOH从蔗渣细胞壁物质（膳食纤维）中分级并经层析柱提纯而得的聚合物纯组分PCF3与PCF4，均是水不溶性阿拉伯木聚糖。其主链结构是由β（1→4）糖苷键连接而成的木聚糖链，主链上有部分Xyl残基通过3-C与2-C分支点分别连接Ara与GlcA侧链，PCF4通过3-C分支点存在少量的第3种侧链［Ara（1→4）Glc（1→）］。PCF3与PCF4的分子量分别为110000与90000，比旋光度分别为＋12．5°与十10．5°。相比于PCF3，PCF4的Xyl：Ara比值小，分子的分支程度大，糖醛酸含量高，分子量小。
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| 关 键 词： | 蔗渣 阿拉伯木聚糖 结构模型 |
Studies on the Chemical Structure of Dietary Fibre from Bagasse (Ⅱ)──Structural Models of PCF3 and PCF4 Fractions |
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| Zheng Jianxian, Geng Liping.Studies on the Chemical Structure of Dietary Fibre from Bagasse (Ⅱ)──Structural Models of PCF3 and PCF4 Fractions[J].Food and Fermentation Industries,1997(3). |
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| Authors: | Zheng Jianxian Geng Liping |
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| Abstract: | Pure polymeric fractions of PCF3 and PCF4, both water-insoluble arabinoxylan,were fractionated from bagasse cell wall material (dietary fibre). with 1mol/L sodium hydroxide extraction and chromatographic column purification. Both PCF3 and PCF4 contained3(1→4) linked xylan as backbone which was branched at position 3-C and 2-C of somexylose residues with single arabinose and glucuronic acid residues as side chains. PCF4 alsocontained less amount of Ara (1→4 )Glc (1→)] linked to the position 3 - C as third sidechain. The molecular weight of PCF3 and PCF4 were 110000 and 90000 respectively, whosespecific optical rotation were + 12. 5° and + 10. 5°seperately. Compared with PCF3, PCF4held lower ratio of Xyl: Ara, more branched structure of bone chain, more content of glucuronic acid and lower molecular weight. |
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| Keywords: | bagasse arabinoxylan structural model |
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