Abstract
Plasma activated medium (PAM) is a relatively new approach for bacterial inactivation while ensuring safety and maintaining the properties of the material to be sterilized. Recent research reported that PAM is effective for bacterial sterilization up to 8 log reductions in CFU/mL. In this paper, further physicochemical/electrical properties of PAM generation by dielectric barrier discharge microplasma (DBD) were investigated at relatively low discharge voltage. Temperature, water lost, pH, UV–VIS absorbance after 2 months, nitrite/nitrate concentration, resistivity and conductivity were assessed after treatment. The results suggested that microplasma treatment of PAM causes increase in resistivity, acidification, dissolved reactive oxygen and nitrogen species (RONS), creating an environment suitable for sterilization of bacteria. These properties could be preserved for long time under low temperature. Therefore, PAM is an effective method for surface sterilization.
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Yahaya, A.G., Okuyama, T., Kristof, J., Blajan, M.G., Shimizu, K. (2022). The Physicochemical/Electrical Properties of Plasma Activated Medium by Dielectric Barrier Discharge Microplasma. In: Khakhomov, S., Semchenko, I., Demidenko, O., Kovalenko, D. (eds) Research and Education: Traditions and Innovations. INTER-ACADEMIA 2021. Lecture Notes in Networks and Systems, vol 422. Springer, Singapore. https://doi.org/10.1007/978-981-19-0379-3_35
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