Abstract Effects of packaging parameters on the inactivation of Salmonella contaminating mixed vegetables in plastic packages using atmospheric dielectric barrier discharge cold plasma treatment (ADCPT) were investigated. The inactivation rate of indigenous aerobes of grape tomatoes in low density polyethylene packaging (1.2 log CFU/tomato) was higher than that in polyethylene terephthalate packaging (0.8 log CFU/tomato). Increasing oxygen concentration in the package headspace by 85% did not affect the Salmonella reduction rate. However, an increase in the volume ratio of headspace to sample from 30:1 to 43:1, a change from indirect treatment to direct treatment, and the use of secondary packaging led to an increase in the Salmonella reduction rates by 1.2, 2.3, and 0.7 log CFU/tomato, respectively. The water vapor permeability of the tested packages increased after ADCPT by 16.7–41.7%, while tensile properties, transparency, glass transition temperature, and surface morphology did not change. Differences in inactivation effects according to package shape were eliminated by shaking during treatment. The results demonstrated the packaging parameter-dependent efficacy of in-package ADCPT and effective ADCPT for mixed vegetable decontamination with minimal package property modification.

中文翻译：

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大气介质阻挡放电冷等离子体处理包装参数对塑料包装中沙门氏菌污染混合蔬菜灭活的影响

摘要 研究了包装参数对大气介质阻挡放电冷等离子体处理（ADCPT）对塑料包装中沙门氏菌污染混合蔬菜的灭活的影响。低密度聚乙烯包装（1.2 log CFU/番茄）的葡萄番茄土著需氧菌的灭活率高于聚对苯二甲酸乙二醇酯包装（0.8 log CFU/番茄）。将包装顶部空间中的氧气浓度增加 85% 不会影响沙门氏菌的减少率。然而，顶空与样品的体积比从 30:1 增加到 43:1，从间接处理到直接处理的变化，以及二次包装的使用导致沙门氏菌减少率增加了 1.2、2.3、和 0.7 log CFU/番茄，分别。ADCPT 后，测试包装的水蒸气渗透率增加了 16.7-41.7%，而拉伸性能、透明度、玻璃化转变温度和表面形态没有变化。在处理过程中通过摇动消除了根据包装形状的灭活效果差异。结果证明了包装内 ADCPT 和有效 ADCPT 对混合蔬菜去污的包装参数依赖性功效，同时对包装特性的修改最小。