食品科学 ›› 2010, Vol. 31 ›› Issue (15): 1-3.doi: 10.7506/spkx1002-6630-201015001

• 基础研究 •    下一篇

大粒车前子多糖酸碱稳定性及热稳定性研究

殷军艺,聂少平* ,林慧霞,李 昌,谢明勇   

  1. 南昌大学 食品科学与技术国家重点实验室
  • 收稿日期:2009-12-18 出版日期:2010-08-15 发布日期:2010-12-29
  • 通讯作者: 聂少平 E-mail:spnie@ncu.edu.cn
  • 基金资助:

    国家自然科学基金项目(20802032);高等学校博士学科点专项科研基金项目(200804030001);
    江西省自然科学基金项目(2008GZH 0050);江西省教育厅2008 年度科技计划项目(GJJ08056)

pH and Thermal Stability of a Polysaccharide Fraction from Plantago asiatica L. Seeds

YIN Jun-yi,NIE Shao-ping*,LIN Hui-xia,LI Chang,XIE Ming-yong   

  1. State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China
  • Received:2009-12-18 Online:2010-08-15 Published:2010-12-29
  • Contact: NIE Shao-ping*, E-mail:spnie@ncu.edu.cn

摘要:

探讨大粒车前子多糖在不同条件下的稳定性。从大粒车前子中提取、分离和纯化得到均一多糖(Plantago asiatica L. polysaccharide,PLP),考察PLP 经酸碱(HCl 溶液或NaOH 溶液)处理后其表观黏度、粒度和单糖组成等方面的变化,并采用热重- 差热同步分析仪(TG-DTA)考察PLP 的热稳定性。结果表明:酸碱处理对PLP 表观黏度、粒度和单糖组成等方面有一定影响。酸处理后(pH 值约为2.7),PLP 表观黏度和粒度增加,阿拉伯糖和木糖的物质的量的比值变化不大;碱处理后(pH 值约为11.4),PLP 表观黏度和粒度减小,木糖比例有一定程度下降。PLP 原液加热后再冷却,粒度增大。热稳定性分析表明PLP 在250℃开始发生降解,550℃基本结束。

关键词: 大粒车前子, 多糖, 稳定性

Abstract:

In this study, the effect of acidic and alkaline treatments on the monosaccharide composition, apparent viscosity and granularity on a polysaccharide fraction (detected to contain a single component) purified from Plantago asiatica L. seeds. Meanwhile, the thermal stability of the polysaccharide fraction was analyzed using thermal gravity-differential thrermal analysis (TG-DTA). The results showed that acidic and alkaline treatments both had certain effect on the apparent viscosity and monosaccharide composition of the polysaccharide fraction. After acidic treatment (approximately pH 2.7), the apparent viscosity and average granularity diameter of the polysaccharide fraction both increased, but the xylose/arabinose molar ratio changed little. However, alkaline treatment (approximately pH 11.4) resulted in a decrease in apparent viscosity, average granularity diameter and xylose/arabinose molar ratio. Heating followed by cooling resulted in an increase in average granularity diameter. The TG-DSC analysis showed that the polysaccharide fraction began to degrade at 250 ℃ and the degradation ended at 550 ℃.

Key words: Plantago asiatica L. seeds, polysaccharide, stability

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