欧姆加热对酶失活模式,番茄汁质量和储存期间微生物多样性的影响
Bo Zou1,2, Aitong Li2, Xiao Chang Liu1
1State Key Laboratory of Animal Nutrition and Feeding, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China.
Journal of food science
|November 8, 2025
概括
欧米加热 (OH) 有效地使番茄汁中的pectin甲基化酶 (PME) 和多聚甲基化酶 (PG) 失活. 这一过程影响了微生物的多样性和质量,为工业应用提供了减少腐烂微生物的基础.
科学领域:
- 食品科学与技术 食品科学与技术
- 微生物学 微生物学
- 生物技术是生物技术.
背景情况:
- 酶活性,特别是甲基聚酶 (PME) 和多甲基聚酶 (PG),显著影响番茄汁的质量和保质期.
- 了解新型加工技术对这些酶和微生物群体的影响对于食品保存至关重要.
研究的目的:
- 研究热 (OH) 对番茄汁中 PME 和 PG 活动的抑制作用.
- 评估OH在储存期间对番茄汁质量属性和微生物多样性的影响.
主要方法:
- 欧姆式加热参数 (电压梯度:10V/cm,频率:150Hz,温度:65°C) 被优化为酶失活.
- 在储存时间内监测了番茄汁的质量 (颜色,烯,总,维生素C,可溶性pectin) 和微生物数量.
- 对OH处理的样本进行了微生物多样性分析.
主要成果:
- 在最佳的OH条件下 (10V/cm,150Hz,65°C),PME和PG的活性分别降低了10%和7%.
- 与对照组相比,OH治疗影响了番茄汁的颜色和营养含量,维生素C比对照组增加2毫克/25天.
- 在OH处理的果汁中,微生物多样性下降,Delftia和Paleobacterium最初占主导地位,其次是Panobacterium.
结论:
- 欧米加热提供了一种可行的方法,可以使番茄汁中的关键腐蚀酶失活.
- OH加工影响果汁质量和微生物动态,可能延长保质期.
- 这些发现支持OH的工业应用,用于减少番茄产品中的腐烂微生物.
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