pH对芝麻蛋白分离物的物理化学,结构和技术功能性质的影响
Azade Ghorbani1, Ali Rafe1, Mohammad Ali Hesarinejad2
1Department of Food Physics Research Institute of Food Science and Technology (RIFST) Mashhad Iran.
Food science & nutrition
|January 23, 2025
概括
pH显著影响芝麻蛋白分离物质 (SPI) 的特性. 调整pH值可以优化SPI.
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
- 生物化学 生物化学
背景情况:
- 芝麻蛋白分离物 (SPI) 是一种营养丰富的植物蛋白质,具有完整的氨基酸特征.
- 了解SPI的特性对于其在可持续食品中的应用至关重要.
研究的目的:
- 研究pH对SPI的物理化学,结构和技术功能性质的影响.
- 评估SPI作为各种食品应用中的可持续成分的潜力.
主要方法:
- 分析蛋白质含量和提取产量.
- 测量密度和压缩性指数.
- 在一系列的pH值中确定 ζ电位,可溶性,光强度和表面水性.
- 结构分析以将电荷和疏水性与功能属性相关联.
主要成果:
- SPI 呈现出高蛋白质含量 (90.60%) 和提取产量 (77.2%).
- 在0.72g/mL的密度和19.22.22的压缩性指数下观察到最佳流动性.
- ζ-电位在pH3.0时从+39mV变化到异电点 (pI,5-5.5) 的0变化,在pH更高时变为负.
- 溶解度和功能性质在酸性和性pH值处达到峰值,pI值为最低值.
- 表面水性在pH值为2.0时最高,与电荷和功能性质相关.
结论:
- pH 是调节 SPI 的物理化学和技术功能性质的关键因素.
- SPI表现出极好的流动性,这表明它适合用于断奶食品.
- 该研究强调了SPI的多功能性和潜力,作为功能性食品开发的可持续成分.
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