悬浮介质对具有不同晶体结构的粉高压加工的影响
1University of Arkansas, Department of Food Science, 2650 N. Young Avenue, Fayetteville, AR 72704, USA.
Food chemistry
|July 29, 2023
概括
高压加工 (HPP) 在水和硫酸中不同地改变了粉的特性. 硫酸增强了粉的修饰,影响了结晶性,粘度和酶易感性,揭示了介质依赖的HPP效应.
科学领域:
- 食品科学 食品科学 食品科学
- 材料科学 是一种材料科学.
背景情况:
- 高压加工 (HPP) 是一种用于修改食品成分的非热方法,主要研究在水性介质中.
- 了解盐溶液等替代媒介中的HPP效应对于扩大其应用至关重要.
- 粉的结构和特性对加工条件和化学环境都很敏感.
研究的目的:
- 为了研究高压加工 (HPP) 对水中的玉米,马和豆粉的影响,与硫酸溶液相比.
- 阐明不同介质如何影响粉中压力诱导的结构和功能变化.
- 为了比较HPP在水和硫酸中对粉凝化,结晶性和酶消化的影响.
主要方法:
- 粉 (玉米,马,豆) 在690MPa的水或0.5M硫酸溶液中经过高压加工 (HPP).
- 分析了包括凝化度,结晶性,粘合行为 (粘度) 和α-氨酶敏感性的物理化学性质.
- 在酶性消化后,使用扫描电子显微镜观察到微观结构变化.
主要成果:
- 在水和硫酸中的HPP降低了所有粉的凝化度和结晶性.
- 硫酸中的HPP诱导了普通玉米和土豆粉中的C型结晶体的过渡.
- 在硫酸中加工的粉呈现较低的粘合温度,更高的峰度和更大的分解,具有改变的α-amylase易受性和消化后的多孔结构.
结论:
- 该介质显著影响HPP诱导的粉修饰,与水相比,硫酸促进了明显的结构转变和功能性质变化.
- 硫酸与粉竞争水分子,改变粉与水的相互作用,并导致基于粉晶体结构的HPP效应变化.
- 这些发现凸显了使用硫酸等替代介质来通过HPP为特定的食品应用量身定制粉属性的潜力.
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