Efficiency of germination inhibition after treatment of an air-water plasma jet: the effect of pulsating DC power. (25th April 2019)

• Record Type: Journal Article
• Authors: Liu, Kun; Deng, Leqiang; Lei, Juzhang; Liu, Shiting
• Is Part Of: Japanese journal of applied physics. Volume 58:Number 5(2019)
• Publication Date: 2019-04-25
• Subjects: air-water plasma jet -- PDC -- ·OH -- O -- germination inhibition efficiency; Physics -- Periodicals; 621.05
• DOI: 10.7567/1347-4065/ab0f5a
• Languages: English
• ISSNs: 0021-4922

Abstract

Abstract: Pulsating direct current (PDC) power consisting of AC power and a diode connected in series was adopted to produce an atmospheric pressure plasma jet. The PDC power is a high-voltage half-wave rectified AC power. During the experiments, the gas temperature of the PDC plasma was in the range of 45.0 °C–59.7 °C. P. digitatum spores spread on a glass slide were directly treated by the plasma plume and a germination inhibition rate was adopted to evaluate the inhibition efficiency. In order to ensure that the plasma plume touched as many spores as possible, the glass slide was fixed on a programmable 3D mobile platform and moved in a zigzag path during the treatment process. The maximum germination inhibition rate reaches 0.701 by the PDC plasma jet at a discharge current of −7.5 mA and water content of 9.58 mg l −1 .