柠檬酸和氙灯光协同作用对菠菜叶片上食源性致病菌的灭活效果。
Synergistic effect of citric acid and xenon light for inactivating foodborne pathogens on spinach leaves.
机构信息
Department of Food Science and Biotechnology, Global K-Food Research Center, Hankyong National University, Anseong-si 17579, South Korea.
Department of Food Science and Biotechnology, Global K-Food Research Center, Hankyong National University, Anseong-si 17579, South Korea.
出版信息
Food Res Int. 2021 Apr;142:110210. doi: 10.1016/j.foodres.2021.110210. Epub 2021 Feb 14.
The aim of this study was to evaluate the synergistic antimicrobial effect of xenon light (XL) and citric acid (CA) combination against Escherichia coli O157:H7, Salmonella Typhimurium, and Listeria monocytogenes on spinach leaves and determine the effect of XL-CA combination on quality of spinach leaves. The XL-CA combined treatment for 8 min synergistically decreased the cell counts of E. coli O157:H7 and S. Typhimurium by 5.25 and 5.05 log CFU/cm, respectively, and additively decreased the L. monocytogenes cells by 5.02 log unit on spinach. The mechanisms underlying synergistic lethal effect of the XL-CA combination were investigated. Qualitative and quantitative analyses revealed that the bacterial cell membrane damage was strongly associated with the synergistic antimicrobial effect of the XL-CA combination. Additionally, treatment with XL-CA combination for 8 min did not affect the quality attributes (color, total phenol contents, and texture) of spinach leaves. These results suggest that the XL-CA combination treatment can be effectively used to control major pathogens on fresh produce.
本研究旨在评估氙气光（XL）与柠檬酸（CA）联合对菠菜叶上大肠杆菌 O157:H7、鼠伤寒沙门氏菌和单核细胞增生李斯特菌的协同抗菌效果，并确定 XL-CA 联合处理对菠菜叶片质量的影响。8 分钟的 XL-CA 联合处理分别协同降低了大肠杆菌 O157:H7 和鼠伤寒沙门氏菌的细胞计数 5.25 和 5.05 log CFU/cm，并且对菠菜上的单核细胞增生李斯特菌细胞的减少量为 5.02 log 单位。研究了 XL-CA 联合的协同致死作用的机制。定性和定量分析表明，细菌细胞膜损伤与 XL-CA 联合的协同抗菌效果密切相关。此外，用 XL-CA 联合处理 8 分钟不会影响菠菜叶片的质量属性（颜色、总酚含量和质地）。这些结果表明，XL-CA 联合处理可有效用于控制新鲜农产品上的主要病原体。
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