蛋白质含量对复制牛奶蛋白度在受控剪切下热稳定性的影响
Anushka Mediwaththe1, Thom Huppertz1,2,3, Jayani Chandrapala4
1Advanced Food Systems Research Unit, Institute of Sustainable Industries & Liveable Cities and College of Sports, Health and Engineering, Victoria University, Werribee Campus, VIC 3030, Australia.
Foods (Basel, Switzerland)
|January 23, 2024
概括
牛奶蛋白缩剂 (MPC) 中较高的蛋白质度在加工过程中受到剪切时显著降低了热稳定性. 这影响了它们在食品应用中的功能.
科学领域:
- 食品科学 食品科学 食品科学
- 乳制品科学 乳制品科学
- 蛋白质化学 蛋白质化学
背景情况:
- 牛奶蛋白缩剂 (MPC) 是食品工业中多功能成分.
- 它们的功能性能可能受到热稳定性问题的限制.
- 食品制造过程中的剪裁可能会影响蛋白质的功能.
研究的目的:
- 为了研究复制的MPCs的热稳定性.
- 为了确定蛋白质度和剪切对热稳定性的影响.
- 了解热和剪切应力下的蛋白质相互作用.
主要方法:
- 在4%和8%的蛋白质度下制备了复制的MPC.
- 在加热过程中,样品受到不同的剪切速率 (100, 1000, 1500 s-1).
- 加热条件包括5分钟的90°C和2.6分钟的121°C.
主要成果:
- 剪裁在4%蛋白质度下对热稳定性产生了很小的影响.
- 在8%的蛋白质度下,剪切显著降低了热稳定性.
- 增加的蛋白质度放大了蛋白质相互作用,被剪切加剧,导致更大的聚合.
结论:
- 在MPC中蛋白质度高会加剧蛋白质相互作用,特别是在剪切下.
- 剪切对缩的MPCs的热稳定性产生负面影响.
- 这些发现对于优化MPC在热加工食品中的使用至关重要.
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