优化UV-LED技术对番茄汁建模,无活化动力学和微生物安全性的影响
Fernando Salazar1, Sebastián Pizarro-Oteíza1, Sebastián Molinett2
1Laboratorio de Fermentaciones Industriales, Escuela de Alimentos, Facultad de Ciencias Agronómicas y de los Alimentos, Pontificia Universidad Católica de Valparaíso, Av. Waddington 716, Valparaíso 2340000, Chile.
Foods (Basel, Switzerland)
|February 10, 2024
概括
紫外线-LED辐射有效地使番茄汁中的病原细菌如大肠杆菌和单细胞菌李斯特菌无活化,确保了微生物安全. 这项技术为保存果汁的传统热处理提供了一个有希望的替代方案.
科学领域:
- 食品科学 食品科学 食品科学
- 微生物学 微生物学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 致病细菌,包括大肠杆菌O157:H7和Listeria monocytogenes,对番茄汁的安全性构成重大风险.
- 传统的保存方法,如热处理,会影响食品的质量.
研究的目的:
- 为了优化UV-LED辐射参数,使番茄汁中的致病细菌失活.
- 通过UV-LED处理来模拟Escherichia coli O157:H7和Listeria monocytogenes的非活性化动力学.
- 为了比较UV-LED加工番茄汁与热处理汁的微生物安全性.
主要方法:
- 使用响应表面方法 (RSM) 来优化UV-LED处理条件 (功率强度,时间,波长).
- 韦布尔模型被用来分析目标病原体的无活化动力学.
- 通过计算存活的细菌 (CFU/mL) 和比较28天的UV-LED治疗与热处理来评估微生物安全性.
主要成果:
- 在最佳的UV-LED条件下 (90%功率,21分钟,273-275nm) 实现了对大肠杆菌O157:H7 (2.89CFU/mL) 和Listeria monocytogenes (2.74CFU/mL) 的显著日志减少.
- 韦布尔模型准确地估计了病原体的不活化,动力参数表明了90%的减少所需的特定紫外线LED剂量.
- 经过UV-LED处理的番茄汁在28天后,与热处理的果汁相比,Listeria monocytogenes数量下降了11.4%.
结论:
- 紫外线-LED辐射是一种可行的技术,可以使番茄汁中的埃舍里希亚大肠杆菌O157:H7和Listeria monocytogenes无活化,从而提高微生物安全性.
- 需要进一步的研究来提高无活化效率,并探索UV-LED在其他水果和蔬菜汁中的应用.
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