食品科学

• 基础研究 •    下一篇

κ-卡拉胶对魔芋胶与脱脂乳蛋白混合体系相形为的影响

刘晴晴,胡 飞,彭雅莉*   

  1. 华南理工大学轻工与食品学院,广东 广州 510640
  • 出版日期:2013-08-15 发布日期:2013-09-03
  • 通讯作者: 彭雅莉
  • 基金资助:

    国家自然科学基金面上项目(31271824)

Effect of κ-Carrageenan on Phase Separation System of Milk Protein and Kofljac Gum

LIU Qing-qing,HU Fei,PENG Ya-li*   

  1. College of Light Industry and Food Sciences, South China University of Technology, Guangzhou 510640, China
  • Online:2013-08-15 Published:2013-09-03
  • Contact: PENG Ya-li

摘要:

利用相体积法绘制魔芋胶与脱脂乳蛋白混合体系的相图,并研究不同质量分数0%、0.025%、0.05%的κ-卡拉胶对混合液质量分数11%脱脂乳粉、0.35%魔芋胶、12%蔗糖相分离行为及流变学特性的影响。结果表明:κ-卡拉胶宏观上能有效地抑制混合体系相分离的产生;流变行为表明所有样液均呈现假塑性,κ-卡拉胶添加量增加使体系的假塑性增强,滞后环面积增加;频率扫描结果显示未添加κ-卡拉胶的样品体系呈现流体特征,添加κ-卡拉胶的样品体系均表现为弱凝胶特性。同时,加入κ-卡拉胶体系的动态模量随频率变化的稳定性大大增强。

关键词: &kappa, -卡拉胶, 魔芋胶, 乳蛋白, 相图, 流变特性

Abstract:

The phase diagram of milk protein/kofljac gum systems was investigated to understand the behavior of both
components, and the effect of κ-carrageenan (0, 0.025% and 0.05%) on phase separation system between 11% skim milk
power and 0.35% kofljac gum with 12% sucrose was studied. All systems investigated showed shear thinning. Samples without
κ-carrageenan exhibited rheological behavior, whereas others contained κ-carrageenan performed weak gel behavior, in which
the macroscopic phase separation was effectively inhibited. Furthermore, κ-carrageenan increased the pseudoplastic behavior
and the area of reverse circles and also greatly enhanced the stability of mixtures against the variation with frequency.

Key words: &kappa, -carrageenan;kofljac gum;milk protein;phase diagram;rheological property

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