蓝色405nmLED光线有效地使食品加工中使用的基板和包装材料上的细菌病原体无活化
Hanyu Chen1, Yifan Cheng2, Carmen I Moraru3
1Department of Food Science, Cornell University, Ithaca, NY, 14853, USA.
Scientific reports
|September 19, 2023
概括
405纳米发光二极管 (LED) 在各种表面和液体薄膜上显示出显著的抗微生物有效性,对抗常见的食源性病原体. 纳米尺度拓增强了无活化,证明了食品安全和医疗保健应用的前景.
科学领域:
- 摄影化学和摄影生物学
- 微生物学 微生物学
- 材料科学 材料科学 材料科学
背景情况:
- 病原细菌在食品加工,服务和医疗保健环境中构成重大风险.
- 传统的消毒方法可能受有效性,材料兼容性或化学残留物限制.
- 可见光消毒为微生物控制提供了一个潜在的替代方案.
研究的目的:
- 为了评估405nm发光二极管 (LED) 的抗菌疗效.
- 评估关键的食源性病原体的无活化,包括大肠杆菌O157:H7,单细胞菌菌, Pseudomonas aeruginosa, 沙门氏菌Typhimurium和金黄色葡萄球菌.
- 研究表面材料和纳米级地形学对无活化效率的影响.
主要方法:
- 在薄液膜 (TLF) 和固体表面的细菌病原体暴露在405nmLED中48小时.
- 使用各种材料:不钢 (SS),高密度聚乙烯 (HDPE),低密度聚乙烯 (LDPE),酸玻璃和纳米级拓的阳极氧化 (AAO).
- 分析了使用韦布尔模型的无活化动力学,并评估了表面性能的影响,如粗性,疏水性和反射性.
主要成果:
- 在测试的细菌和表面实现了显著的日志减少 (1.36.3日志CFU).
- 不活化速率因病原体和表面类型而异,在特定的AAO纳米孔表面观察到的速度更快.
- 无活化曲线遵循非线性韦布尔动力学,在固体表面上的模型更适合 (R2 ≥ 0.89),而不是在TLF (R2 ≥ 0.76).
结论:
- 405nm的LED显示出强大的抗菌活性,对抗一系列关键的病原体.
- 表面地形,特别是纳米尺度的特征,可以增强细菌不活化.
- 这项技术对食品加工,处理和医疗保健环境中的非热微生物控制具有重大前景.
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