RT Journal Article
ID 44aea49d6301d5bb
A1 Takamatsu, Toshihiro
A1 Kawate, Akitsugu
A1 Uehara, Kodai
A1 Oshita, Takaya
A1 Miyahara, Hidekazu
A1 Dobrynin, Danil
A1 Fridman, Gregory
A1 Fridman, Alexander A.
A1 Okino, Akitoshi
T1 Bacterial Inactivation in Liquids Using Multi-Gas Plasmas
JF Plasma Medicine
JO PMED
YR 2012
FD 2014-07-22
VO 2
IS 4
SP 237
OP 247
K1 multi-gas plasma
K1 nonthermal plasma
K1 sterilization
K1 pH measurement
K1 reactive oxygen and nitrogen species
K1 plasma medicine
AB Using a multi-gas plasma jet, we generated plasmas of various gas species such as argon, oxygen, nitrogen, carbon dioxide, and air. Photometric measurements of colorforming reactions were used to identify singlet oxygen, OH radicals, hydrogen peroxide, NO radicals, nitrite, and nitrate, which are important sterilization agents that are generated in the liquid phase. Oxygen plasma generated the largest amount of singlet oxygen, OH radicals, and hydrogen peroxide. Air plasma generated NO radicals, nitrite, and nitrate. The pH of air
plasma−treated water for 120 s dropped below 3.0. The air plasma sterilized Escherichia coli in distilled water after 120 s of treatment. In addition, when the initial pH was fixed below 3.6, E. coli was more effectively sterilized by oxygen plasma. Furthermore, dimethylsulfoxide, which is an OH radical scavenger, suppressed the sterilization effect of oxygen plasma.
PB Begell House
LK https://www.dl.begellhouse.com/journals/5a5b4a3d419387fb,25266a5313ab0f35,44aea49d6301d5bb.html