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Chicken fillets subjected to UV‐C and pulsed UV light: Reduction of pathogenic and spoilage bacteria and changes in sensory quality

机译:经受紫外线和脉冲紫外线照射的鸡柳:减少病原菌和腐败菌并改善感官品质

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摘要

We have compared the efficacy of continuous ultraviolet (UV‐C) (254 nm) and pulsed UV light in reducing the viability of Salmonella Enteritidis, Listeria monocytogenes, Staphylococcus aureus, enterohemorrhagic Escherichia coli, Pseudomonas spp., Brochothrix thermospacta, Carnobacterium divergens, and extended‐spectrum β‐lactamase producing E. coli inoculated on chicken fillet surface. Fluences from 0.05 to 3.0 J/cm2 (10 mW/cm2, from 5 to 300 s) used for UV‐C light resulted in average reductions from 1.1 to 2.8 log cfu/cm2. For pulsed UV light, fluences from 1.25 to 18.0 J/cm2 gave average reductions from 0.9 to 3.0 log cfu/cm2. A small change in the odor characterized as sunburnt and increased concentration of volatile compounds associated with burnt odor posed restrictions on the upper limit of UV treatment, however no sensory changes were observed after cooking the meat. Treatments under modified atmosphere conditions using a UV permeable top film gave similar or slightly lower bacterial reductions.
机译:我们比较了连续紫外(UV-C)(254 nm)和脉冲紫外光在降低肠炎沙门氏菌,单核细胞增生李斯特菌,金黄色葡萄球菌,肠出血性大肠杆菌,假单胞菌属,嗜热布鲁氏菌,分枝杆菌和鸡圆角表面接种了产广谱β-内酰胺酶的大肠杆菌。用于UV-C光的通量从0.05到3.0 J / cm 2 (10 mW / cm 2 ,从5到300 s),平均从1.1降低到2.8记录cfu / cm 2 。对于脉冲紫外线,从1.25到18.0 J / cm 2 的能量密度平均降低从0.9到3.0 log cfu / cm 2 。以晒伤为特征的气味的细微变化和与灼烧的气味相关的挥发性化合物的浓度增加限制了UV处理的上限,但是在煮肉后未观察到感官变化。使用紫外线可透过的顶层薄膜在改良的大气条件下进行处理,可减少或减少相似的细菌。

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