Inactivation Effect of Colletotrichum Gloeosporioides by Long-Lived Chemical Species Using Atmospheric-Pressure Corona Plasma-Activated Water

Mu Chien Wu*, Chih Tung Liu, Chun Yi Chiang, Yi Jia Lin, Ying Hong Lin, Yao Wen Chang, Jong-Shinn Wu

*Corresponding author for this work

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

In this paper, atmospheric-pressure air and oxygen corona plasma jets under water surface have been used to generate plasma-activated water (PAW) to inactivate colletotrichum gloeosporioides (C. gloeosporioides) suspension. The atmospheric-pressure plasma jets in the water were characterized by measuring: 1) the electrical and optical properties for evaluating the plasma efficiency and 2) the physicochemical properties of PAW, including pH value, oxidation-reduction potential value, and the concentration of hydrogen peroxide, nitrite, and ozone. The aim of this paper is to investigate the effects of long-lived reactive oxygen and nitrogen species (RONS) and environmental factor (acidity) in PAW on fungicidal property. The results of antifungal activity show that the inactivation rate of C. gloeosporioides is higher using air-PAW than oxygen-PAW, and increases with increasing reaction time when preparation time of PAW is fixed as 30 min. This correlates well with measurements of the aqueous-phase long-lived RONS concentration such as nitrate and ozone, suggesting these species play crucial roles in the inactivation process.

Original languageEnglish
Article number8493575
Pages (from-to)1100-1104
Number of pages5
JournalIEEE Transactions on Plasma Science
Volume47
Issue number2
DOIs
StatePublished - 1 Feb 2019

Keywords

  • Antifungal activity
  • atmospheric-pressure plasma jet
  • colletotrichum gloeosporioides (C. gloeosporioides)
  • indirect interaction
  • plasma activated water (PAW)
  • reactive nitrogen and oxygen species

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