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ID 117580
著者
Izumi, Takuto Tokushima University
Mukai, Takashi Nichia Corporation
キーワード
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
資料タイプ
学術雑誌論文
抄録
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.
掲載誌名
Biochemical Engineering Journal
ISSN
1369703X
cat書誌ID
AA11194593
AA11522309
出版者
Elsevier
187
開始ページ
108661
発行日
2022-10-04
権利情報
© 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/
EDB ID
出版社版DOI
出版社版URL
フルテキストファイル
言語
eng
著者版フラグ
著者版
部局
理工学系
生物資源系