Inactivation of <Emphasis Type="Italic">Shewanella putrefaciens</Emphasis> by Plasma Activated Water |
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| Authors: | Zhihua Qi Enqiang Tian Ying Song Eduard A Sosnin Viktor S Skakun Tingting Li Yang Xia Yao Zhao XueSong Lin Dongping Liu |
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| Institution: | 1.School of Physics and Materials Engineering,Dalian Minzu University,Dalian,China;2.Key Laboratory of Materials Modification by Laser, Ion and Electron Beams,Dalian University of Technology,Dalian,China;3.College of Life Science,Dalian Minzu University,Dalian,China;4.Institute of High Current Electronics SB RAS,Tomsk,Russia |
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| Abstract: | Plasma activated water (PAW) generated by atmospheric-pressure air microplasma arrays is a solution containing a variety of reactive species. Here we investigate the effects of different applied voltage and water-activated time on bactericidal activities against Shewanella putrefaciens (S. putrefaciens). Our measurements showed that the sterilization efficiency of S. putrefaciens by PAW could be up to 2.0 Log Reduction. Scanning electron microscopy image and DNA concentration measurement showed that the S. putrefaciens cells were damaged and deformed due to the PAW treatment. The physicochemical properties of PAW treated by different applied voltage and water-activated time were evaluated, including pH value, initial PAW temperature, and the concentrations of plasma-activated species, such as H2O2, NO 3 ? , NO 2 ? , and O3. Analysis indicates that the sterilization efficiency of S. putrefaciens treated by PAW was mainly determined by H2O2 concentration and pH value of PAW. This study provides a basis for the PAW potential applications in the disinfection of rotten food. |
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