食品科学 ›› 2010, Vol. 31 ›› Issue (10 ): 16-19.doi: 10.7506/spkx1002-6630-201010004

• 工艺技术 • 上一篇    下一篇

玉米皮多糖制备、分离纯化及相对分子质量的测定

张艳荣,于 君,刘相阳,王大为*   

  1. 吉林农业大学食品科学与工程学院
  • 收稿日期:2010-03-02 出版日期:2010-05-15 发布日期:2010-12-29
  • 通讯作者: 王大为* E-mail:xcpyfzx@163.com
  • 基金资助:

    国家“863”计划项目(2007AA10Z336)

Isolation, Purification and Relative Molecular Mass Determination of Corn Bran Polysaccharides

ZHANG Yan-rong,YU Jun,LIU Xiang-yang,*   

  1. College of Food Science and Engineering, Jilin Agricultural University, Changchun 130118, China
  • Received:2010-03-02 Online:2010-05-15 Published:2010-12-29
  • Contact: WANG Da-wei E-mail:xcpyfzx@163.com

摘要:

采用微波提取及95% 乙醇沉淀处理制备玉米皮粗多糖,经D315 型离子交换树脂脱蛋白,乙醇分级沉淀及Sephadex G-100、Sephadex G-75 层析柱纯化得CSPA-1、CSPA-2 和CSPB。紫外- 可见光谱在220~400nm 处扫描CSPA-1、CSPA-2 及CSPB,无蛋白及核酸吸收峰。纯化得到的多糖经葡聚糖凝胶层析法测得相对分子质量分别为186170、103885、146887。

关键词: 玉米皮, 多糖, 分离纯化, 相对分子质量

Abstract:

Crude corn bran polysaccharides (CBP) were obtained through microwave-assisted extraction followed by 95% alcohol precipitation, purified through D315 ion exchange resin column chromatography for the removal of protein and fractionated into 2 fractions, CBPA and CBPB, through fractional precipitation with alcohol. CBPA was further fractionated through Sephadex G-100 column chromatography into 2 subfractions, CBPA-1 and CBPA-2 of which Sephadex G-75 column elution profile exhibited a single absorption peak. Sephadex G-75 column chromatographic analysis indicated that CBPB comprised a single homogeneous composition. Neither protein nor nuclear acid characteristic absorption peaks were shown in the UV-visible spectra of CBPA-1, CBPA-2 and CBPB. The relative molecular mass of CBPA-1, CBPA-2 and CBPB were determined by the dextran gel filtration method to be 186170, 103885 and 146887 , respectively.

Key words: corn spermoderm, polysaccharide, purification, relative molecular mass

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