大豆蛋白粉层机制隔离储存期间的功能恶化:聚合和氧化应激的相互作用
Hui Zhang1, Tong Zhang1, Xiong Zhang1
1Beijing Key Laboratory of Plant Protein and Cereal Processing, College of Food Science and Science and Nutritional Engineering, China Agricultural University, Beijing 100083, PR China.
Food chemistry
|September 27, 2025
概括
储存导致大豆蛋白分离物 (SPI) 由于聚合和氧化而失去功能. 这些粉末水平的变化会损害水合和分散,导致溶解性降低和乳化. 提高SPI稳定性需要解决这些与存储相关的问题.
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
- 材料科学 是一种材料科学.
背景情况:
- 大豆蛋白分离物 (SPI) 广泛使用,但在储存期间容易发生功能衰退.
- 在SPI功能恶化背后的确切机制仍然不完全理解.
- 了解这些机制对于提高植物蛋白质的保质期和应用至关重要.
研究的目的:
- 研究粉末级物理和化学变化与储存期间SPI的功能损失之间的关系.
- 阐明SPI不稳定的背后机制.
- 为改善植物蛋白粉末的储存稳定性提供见解.
主要方法:
- 大豆蛋白分离物 (SPI) 储存了四周.
- 评估了包括可溶性,凝和乳化在内的功能性质.
- 分析了粉末的特性,例如粒子大小,表面自由能量和聚合.
- 评估了氧化变化 (碳基水平) 和蛋白质结构 (骨干完整性,形状放松).
主要成果:
- 储存的SPI显示溶解度显著降低 (42.1%),凝/乳化能力降低.
- 颗粒大小增加了29.1% (p < 0.05),表明大量的粉末聚合.
- 减少的表面自由能量表明受损的可湿性和水合性.
- 观察到氧化性修饰,如碳酸水平增加和形状放松,而脊柱在很大程度上保持完整.
结论:
- 粉末聚合和氧化结构变化是SPI功能恶化的关键因素.
- 这些综合因素损害了蛋白质的水分和分散,导致功能丧失.
- 这些发现为SPI的不稳定性提供了机制性的见解,并为改善存储稳定性提供了基础.
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