射频加热失活对模型食品中食品传播病原体的影响,结构矩阵复杂性各不相同
Davy Verheyen1, Julian Espitia1, Dmytro S Kozak1,2
1BioTeC+ - Chemical and Biochemical Process Technology and Control, KU Leuven, Gebroeders de Smetstraat 1, Gent, 9000, Belgium.
Scientific reports
|December 2, 2025
概括
无线电频率 (RF) 加热为食品中的病原体无活化提供了传统方法的替代方案. 这项研究揭示了RF射频.
科学领域:
- 食品科学 食品科学 食品科学
- 微生物学 微生物学
- 食品加工技术 食品加工技术
背景情况:
- 传统的热处理是食品中病原体失活的标准.
- 射频 (RF) 加热是一种有前途的替代方案,但其在各种食物结构中的有效性尚未完全理解.
- 了解与食品微观结构性质相关的RF对细菌失活的影响至关重要.
研究的目的:
- 研究与传统加热相比,射频加热对Listeria monocytogenes和沙门氏菌Typhimurium无活化的间接影响.
- 为了确定食物矩阵风学 (粘度和结构) 对射频失活功能的影响.
- 为了比较RF无活化动力学与传统的热无活化在不同的食物矩阵.
主要方法:
- 通过使用Listeria monocytogenes和Salmonella Typhimurium进行了射频和常规热失活实验.
- 使用了三种不同的食物矩阵:低粘度液体,高粘度液体和水性凝.
- 在不同的温度和矩阵条件下,量化失活率 (k).
主要成果:
- 在L. monocytogenes的水凝和S. Typhimurium的液体中,在更高的温度下观察到比传统加热更高的无活化率的间接射频效应.
- 增加液体矩阵粘度降低了无活化率,同样适用于射频和常规加热.
- 对于S. Typhimurium,对射频和常规加热的矩阵结构效应类似,在高粘度液体中无活化比在水凝中更高.
- 与传统加热相比,L. monocytogenes在使用射频的水凝中表现出较低的无活化率下降,这表明了潜在的射频特异机制.
结论:
- 射频加热显示了致病原体不活化的潜力,其矩阵特性显著影响了疗效.
- 在凝食品基质中,RF可能表现出特定的无活化机制,特别是对于L. monocytogenes.
- 需要进一步的研究来阐明RF特定的无活化机制,并优化其在各种食品系统中的应用.
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