Evaluation of the effect of cold plasma against Pseudomonas aeruginosa inoculated in rose water

Cold plasma is a novel non-thermal food processing technology that uses reactive medium and energetic photons and particles, to inactivate contaminating microbes on various foods. The aim of this study was to investigate the effect of atmospheric pressure cold plasma on Pseudomonas aeruginosa in vitro and rose water. In this experimental study, P. aeruginosa was exposed to 15 kHz plasma for 10, 30, 50 and 70 seconds. The effect of plasma on rose water inoculated with the bacterium at a concentration of 105 CFU / mL during storage for 7 days at room temperature was also investigated. The results showed that the highest non-growth halo diameter in P. aeruginosa was 31 mm in 70 seconds treatment. In addition, the plasma had an inhibitory effect on growth of P. aeruginosa in rose water during storage. Therefore, the use of plasma as a non-thermal and microbial reducing method in the rose industry is recommended.