炸对麦蛋白质分离物的物理化学和功能性质的影响
Xia Wang1, Yang Lei1, Hamad Rafique1
1College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an 710119, China.
Foods (Basel, Switzerland)
|July 29, 2023
概括
在230°C下烤麦蛋白分离物 (OPI) 长达30分钟,减少了氨基酸,但改善了水的保留,发泡和乳化. 这种加工会影响麦蛋白的结构和功能.
科学领域:
- 食品科学 食品科学 食品科学
- 蛋白质化学 蛋白质化学
- 营养科学 营养科学
背景情况:
- 像麦这样的作物中的酶失活对于保质期至关重要.
- 炸是常见的,但可以降低营养价值和蛋白质.
- 烤对麦蛋白的影响还不太清楚.
研究的目的:
- 为了研究炸时间对麦蛋白分离物 (OPI) 特性的影响.
- 了解热处理后OPI物理化学和功能特征的变化.
主要方法:
- 提取麦蛋白分离物 (OPI). 麦蛋白分离物的提取.
- 在230°C的温度下,在0,10,20和30分钟的时间内进行炸.
- 分析氨基酸含量,二次结构,二硫化键,颗粒大小,可消化性和功能性质 (保持水分,发泡,乳化).
主要成果:
- 炸降低了氨基酸含量,可能是由于梅拉德反应.
- 增加的炸时间改变了OPI的二次结构,从β转向β片.
- 蛋白质变质增加了二硫化物键,导致聚合,更大的颗粒大小,降低了消化能力.
- OPI的保持水分,泡和乳化特性在炸后得到了改善.
结论:
- 炸显著改变了麦蛋白分离物的物理化学和结构性质.
- 尽管消化能力和氨基酸含量降低,但功能性质的增强表明OPI在食品应用中的潜力.
- 这些发现为优化麦加工和开发功能性麦食品提供了洞察力.
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