Effects of dielectric barrier discharge atmospheric cold plasma (DACP) treatment on the inactivation of Salmonella and the storability of grape tomato were investigated. Grape tomatoes, with or without inoculation with Salmonella, were packaged in a polyethylene terephthalate (PET) commercial clamshell container and cold plasma-treated at 35 kV at 1.1 A for 3 min using a DACP system equipped with a pin-type high-voltage electrode. DACP treatment inactivated Salmonella (p < 0.05) without altering the color or firmness of the grape tomatoes (p > 0.05). DACP treatment inactivated Salmonella uniformly in both layers of the double-layer configuration of the grape tomatoes regardless of the position of the tomatoes in each layer. Salmonella was most efficiently inactivated when the headspace to tomato volume ratio of the container was highest. Integration of rolling of tomatoes during treatment significantly increased the Salmonella reduction rates from 0.9 ± 0.2 log CFU/tomato to 3.3 ± 0.5 log CFU/tomato in the double-layer configuration of the tomato samples. Rolling-integrated DACP also initially reduced the number of total mesophilic aerobic bacteria and yeast and molds in the double-layer configuration of tomato samples by 1.3 ± 0.3 and 1.5 ± 0.2 log CFU/tomato, respectively. DACP treatment effectively reduced the growth of Salmonella and indigenous microorganisms at 10 and 25 °C, and did not influence the surface color, firmness, weight loss, lycopene concentration and residual ascorbic acid of grape tomatoes during storage at 10 and 25 °C. DACP treatment holds promise as a post-packaging process for improving microbial safety against Salmonella and storability of fresh grape tomatoes.

研究了电介质阻挡放电大气冷等离子体（DACP）处理对沙门氏菌灭活和葡萄番茄耐贮性的影响。将有或没有接种沙门氏菌的葡萄西红柿包装在聚对苯二甲酸乙二醇酯（PET）商用翻盖式容器中，并使用配备有针型高压电极的DACP系统在35 kV下以1.1 A进行冷等离子处理3分钟。 。DACP处理可灭活沙门氏菌（p  <0.05），而不会改变葡萄番茄的颜色或硬度（p  > 0.05）。DACP治疗灭活沙门氏菌不论西红柿在每一层中的位置如何，在葡萄西红柿的双层结构的两层中均一地分布。当容器的顶部空间与番茄的体积比最高时，沙门氏菌被最有效地灭活。在番茄样品的双层结构中，处理过程中番茄滚动的整合显着提高了沙门氏菌减少率，从0.9±0.2 log CFU /番茄增至3.3±0.5 log CFU /番茄。滚动整合的DACP最初还使番茄样品的双层结构中的总嗜温需氧细菌和酵母菌和霉菌的数量分别减少了1.3±0.3和1.5±0.2 log CFU /番茄。DACP治疗有效降低沙门氏菌的生长以及在10和25°C下保存的原生微生物，并且在10和25°C下保存期间不会影响葡萄番茄的表面颜色，硬度，重量减轻，番茄红素浓度和残留抗坏血酸。DACP处理有望成为包装后过程，以提高抗沙门氏菌的微生物安全性和新鲜葡萄番茄的耐贮藏性。