Evaluation of non-thermal hurdle technology for ultraviolet-light to inactivate Escherichia coli K12 on goat meat surfaces
Evaluation of non-thermal hurdle technology for ultraviolet-light to inactivate Escherichia coli K12 on goat meat surfaces
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DOI：
10.1016/j.foodcont.2018.02.042
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发表时间：
2018-08-01
期刊：
影响因子：
6
通讯作者：
Kannan, Govind
中科院分区：
文献类型：
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作者：
Degala, Hema L.;Mahapatra, Ajit K.;Kannan, Govind
肉类行业需要非热处理，因为它们能够在室温下杀灭食源性病原体，如大肠杆菌O 157：H7。虽然紫外线（UV-C）是一种潜在的消除病原体的过程，同时保持食品的质量，其渗透固体食品的效率低下，可能会导致较低的对数减少肉类中的病原体。因此，有必要研究障碍技术。柠檬草油（LG）具有抗菌，抗真菌和抗氧化特性，可以成为理想的替代品。因此，本研究的目的是评估UV-C、LG及其组合对E. coli K12接种山羊肉。用浓度为0.25%、0.5%和1%（w/v）的柠檬草油，强度为100和200 μ W cm（-2），提供0.2-2.4 mJ cm（-2）的UV-C能量剂量，分别处理山羊肉2、4、6、8、10、LG处理的山羊肉样品的顶表面通过这些处理组合用UV-C处理。1% LG + UV-C与200 μ W cm（-2）处理2 min的组合导致协同微生物减少6.66 log（10）CFU mL（-1）（低于检测水平）。coil K12与对照相比，其水平显著高于单独和其他栅栏处理（P
Non-thermal processes are in demand in the meat industry due to their ability to inactivate foodborne pathogens, such as Escherichia coli O157:H7, at room temperatures. Although ultraviolet-light (UV-C) is a potential process for eliminating pathogens while preserving the quality of foods, its inefficiency in penetrating solid foods might result in a lower log reduction of pathogens in meat. Thus, it is necessary to look at hurdle technologies. Lemongrass oil (LG), with its antimicrobial, antifungal and antioxidant properties, can be an ideal alternative. Therefore, the objective of this study was to evaluate the efficacy of UV-C, LG, and their combination on E. coli K12 inoculated goat meat. Lemongrass oil at 0.25%, 0.5%, and 1% concentrations (w/v) with intensities of 100 and 200 mu W cm(-2), which provided an energy dose of 0.2-2.4 mJ cm(-2) of UV-C, was used to treat goat meat for 2, 4, 6, 8, 10, and 12 min. The top surfaces of LG treated goat meat samples were treated with UV-C by these combinations of treatments. The combination of 1% LG + UV-C with 200 mu W cm(-2) treatment for 2 min resulted in a synergistic microbial reduction of 6.66 log(10) CFU mL(-1) (below detection levels) of E. coil K12 compared to the control, the level of which was significantly higher than individual and other hurdle treatments (P