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Antimicrobial effects and mechanism of plasma activated fine droplets produced from arc discharge plasma on planktonic Listeria monocytogenes and Escherichia coli O157:H7
Journal of Physics D: Applied Physics ( IF 2.829 ) Pub Date : 2020-01-13 , DOI: 10.1088/1361-6463/ab634d
K H Baek, H I Yong, J H Yoo, J W Kim, Y S Byeon, J Lim, S Y Yoon, S Ryu and C Jo

In this study, we investigated the antimicrobial effects of plasma activated fine droplet (PAD) produced from arc discharge plasma on planktonic Listeria monocytogenes and Escherichia coli O157:H7. NaCl (0.9%, w/v) was used as the feeding solution for the plasma discharge. The inactivation mechanism of the PAD treatment was also investigated. PAD mainly contains H 2 O 2 and OCl − , which play a significant role in the inactivation process against L. monocytogenes and E. coli O157:H7. The population of L. monocytogenes and E. coli O157:H7 was significantly reduced by approximately 3 and 4 log units, respectively, within 5 min of exposure to PAD. However, the bactericidal effects of PAD against L. monocytogenes and E. coli O157:H7 showed different trends by showing 0.58 and 4.13 log reductions, respectively, after 1 min of PAD exposure time. The change of membrane integrity was evaluated using two ...
更新日期:2020-01-13

 

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