食品科学 ›› 2008, Vol. 29 ›› Issue (1): 64-68.

• 基础研究 • 上一篇    下一篇

山楂果胶的黏度特性及其与化学构造的关联性

 李拖平, 王娜, 李苏红, 郭梅, 张陈云   

  1. 天津农学院食品科学系; 筑波大学生命环境科学研究科; 天津农学院食品科学系 天津300384; 天津300384; 日本筑波305-8572;
  • 出版日期:2008-01-15 发布日期:2011-07-28

Viscous Properties and Structural Characteristics of Haw Pectin

 LI  Tuo-Ping, WANG  Na, LI  Su-Hong, GUO  Mei, ZHANG  Chen-Yun   

  1. 1.Department of Food Science, Tianjin Agricultural University, Tianjin 300384, China; 2. Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba 305-8572, Japan
  • Online:2008-01-15 Published:2011-07-28

摘要: 山楂果实中含有大量的果胶,其果胶溶液的黏度高于同等条件下市售柠檬果胶的黏度。山楂果胶与柠檬果胶黏度不同的主要是由山楂果胶与柠檬果胶中中性糖组分(Hf1、Lf1)的化学组成与化学构造的不同以及山楂果胶中存在而柠檬果胶中不存在的酸性糖组分(Lf2)所引起的。对山楂果胶中中性糖组分Hf1的化学构造特征进行分析的结果表明,Hf1是一种含有Glc(1→3)Xyl与Xyl(1→6)Glc这两种键合样式的Arabinoxyloglucan。

关键词: 山楂, 果胶, 黏度, 化学构造, Arabinoxyloglucan

Abstract: Haw pectin showed much higher viscosity than commercially available lemon pectin. On hydrolysis by purified pecinase, both haw and lemon pectin left the pectinase-resistant fractions (Hf and Lf) in a high molecular weight region. DEAE-Sephadex A-25 column chromatography of the resistant fractions showed three peaks (Hf1, 2, 3) for Hf and two peaks (Lf1, 2) for Lf. Acidic fractions Hf3 and Lf3 were structurally similar to each other, but the neutral fractions Hf1 and Lf1 were totally different to constitutional sugar. The structural difference of neutral fractions (Hf1 and Lf1) and presence/absence of acidic fraction corresponding to Hf2 in the pectin molecule might be related to the viscosity of the pectin. Chemical structural analysis by GC and MS showed that the neutral fraction of Hf is an arabinoxyloglucan containing the linkages of Glc(1→3)Xyl and Xyl (1→6)Glc.

Key words:  , haw; pectin; viscosity; structure; arabinoxyloglucan;