二元豆蛋白-酸水凝:关于pH值和离子强度对物理稳定性和机械特性的影响的见解
Adonis Hilal1, Anna Florowska1, Ewa Domian2
1Department of Food Technology and Assessment, Institute of Food Science, Warsaw University of Life Sciences, 02-787 Warsaw, Poland.
Gels (Basel, Switzerland)
|June 26, 2024
概括
在不同的pH值和离子强度下研究了豆蛋白-psyllium水凝的特性. 在最佳条件下,如pH 3与0.3M NaCl,可产生稳定,可调节的工业用水凝.
科学领域:
- 食品科学与技术 食品科学与技术
- 生物聚合物科学 生物聚合物科学
- 材料科学是一种材料科学.
背景情况:
- 食品水凝是生物活性化合物的至关重要的输送系统,使用各种食品级生物聚合物制成.
- 水凝的工业应用在很大程度上取决于它们的物理化学特性.
- 在不同的pH值和离子强度条件下,关于豆蛋白-豆二元水凝的数据有限.
研究的目的:
- 为了研究pH值和离子强度对豆蛋白-psyllium水凝特性的影响.
- 为了评估物理稳定性,颜色,纹理,微观学和粘弹性特征.
- 确定配方条件如何影响工业应用中的水凝功能.
主要方法:
- 在不同的pH值 (7,4.5,3) 和离子强度 (0.15M和0.3M NaCl) 时,配制和诱导了豆蛋白-psyllium水凝.
- 测量了物理稳定性,颜色,纹理,微观学和粘弹性特性 (G',G",复杂粘度).
- 分析了线性粘弹性区域,以评估结构完整性.
主要成果:
- 颜色差异在较低的pH值时最明显.
- 在pH 7 (含/不含NaCl) 和pH 4.5/3 (不含NaCl) 形成的水凝具有较低的稳定性和模块性,表明可扩散性.
- 在pH 4.5和3与NaCl诱导的水凝显示出高的结构稳定性,模块和粘度,pH 3和0.3M NaCl产生了最高的弹性和储存模块.
结论:
- 在诱导过程中调整pH值和离子强度显著改变了豆蛋白-psyllium水凝的特性.
- 根据特定的工业需求,调整这些条件可以精确控制水凝的特性.
- 这项研究为优化在食品和其他应用中的豆蛋白-psyllium水凝提供了关键数据.
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