2026-03-15T20:25:06Z https://tokushima-u.repo.nii.ac.jp/oai

oai:tokushima-u.repo.nii.ac.jp:02010383 2025-04-28T06:38:43Z 1713853213384:1713853295607

Bactericidal effects of low-temperature atmospheric-pressure air plasma jets with no damage to plant nutrient solutions 30314842 川上, 烈生 カワカミ, レツオ Kawakami, Retsuo 川上 カワカミ Kawakami 烈生 レツオ Retsuo 60596211 (中橋)粟飯原, 睦美 (ナカハシ)アイハラ, ムツミ Nakahashi-Aihara, Mutsumi (中橋)粟飯原 (ナカハシ)アイハラ Nakahashi-Aihara 睦美 ムツミ Mutsumi イズミ, タクト イズミ, タクト Izumi, Takuto 40380117 白井, 昭博 シライ, アキヒロ Shirai, Akihiro 白井 シライ Shirai 昭博 アキヒロ Akihiro ムカイ, タカシ ムカイ, タカシ Mukai, Takashi open access © 2022. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/ Direct irradiation with air plasma jet Twisted wire-cylindrical electrode configuration Bacterial inactivation in plant nutrient solution No reduction of plant nutrient components Reactive oxygen and nitrogen species The bactericidal effects of air plasma jets produced with a twisted wire-cylindrical electrode configuration were clarified in terms of plasma-induced damage to plant nutrient solutions. The bacterial suspensions were directly irradiated with air plasma jets using a low gas flow rate, which was shown to significantly inactivate the bacteria suspended in the solutions without reducing the nutrient concentrations. However, the plasma irradiation time required for inactivation depended on the type of bacteria; Escherichia coli (E. coli) and Bacillus subtilis (B. subtilis) were inactivated in 20–30 s, while Staphylococcus aureus (S. aureus) required 7 min. The inactivation of E. coli and B. subtilis decreased with increasing air gas flow rate, whereas the inactivation of S. aureus was independent of the rate. The inactivation could be attributed to a greater number of reactive oxygen and nitrogen species (RONS) from the air plasma jet, including O2 molecules in the feeding gas attaching to the bacterial suspension surface, which do not harm the nutrient components. This can be derived from the results; the air-plasma-jet-activated nutrient solutions (RONS introduced in the solutions) and the N2 plasma jets had only a limited inactivation effect on the bacteria suspended in the solutions. Elsevier 2022-10-04 eng journal article AM 392411 https://tokushima-u.repo.nii.ac.jp/records/2010383 https://doi.org/10.1016/j.bej.2022.108661 10.1016/j.bej.2022.108661 1369703X AA11194593 AA11522309 Biochemical Engineering Journal 187 108661 https://tokushima-u.repo.nii.ac.jp/record/2010383/files/bej_187_108661.pdf application/pdf 1.01 MB 2024-10-04