Inactivation of Escherichia coli and Staphylococcus aureus on contaminated perilla leaves by Dielectric Barrier Discharge (DBD) plasma treatment

2018 ◽  
Vol 643 ◽  
pp. 32-41 ◽  
Author(s):  
Sang Hye Ji ◽  
Se Hoon Ki ◽  
Ji Ho Ahn ◽  
Jae Ho Shin ◽  
Eun Jeong Hong ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Plasma Treatment ◽  
Dielectric Barrier Discharge ◽  
Barrier Discharge ◽  
Dbd Plasma ◽  
Dielectric Barrier ◽  
And Staphylococcus Aureus

scholarly journals Virucidal Effects of Dielectric Barrier Discharge Plasma on Human Norovirus Infectivity in Fresh Oysters (Crassostrea gigas)

Foods ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. 1731
Author(s):  
Man-Seok Choi ◽  
Eun Bi Jeon ◽  
Ji Yoon Kim ◽  
Eun Ha Choi ◽  
Jun Sup Lim ◽  
...  
Keyword(s):  
Plasma Treatment ◽  
Dielectric Barrier Discharge ◽  
Copy Number ◽  
Barrier Discharge ◽  
Quantitative Polymerase Chain Reaction ◽  
Inactivation Kinetics ◽  
Dbd Plasma ◽  
Human Norovirus ◽  
Dielectric Barrier ◽  
The Impact

This study investigates the effects of dielectric barrier discharge (DBD) plasma treatment (1.1 kV, 43 kHz, N2 1.5 L/min, 10~60 min) on human norovirus (HuNoV) GII.4 infectivity in fresh oysters. HuNoV viability in oysters was assessed by using propidium monoazide (PMA) as a nucleic acid intercalating dye before performing a real-time reverse transcription–quantitative polymerase chain reaction (RT-qPCR). Additionally, the impact of the DBD plasma treatment on pH and Hunter colors was assessed. When DBD plasma was treated for 60 min, the HuNoV genomic titer reduction without PMA pretreatment was negligible (<1 log copy number/µL), whereas when PMA treatment was used, HuNoV titer was reduced to >1 log copy number/µL in just 30 min. D1 and D2-value of HuNoV infectivity were calculated as 36.5 and 73.0 min of the DBD plasma treatment, respectively, using the first-order kinetics model (R2 = 0.98). The pH and Hunter colors were not significantly different (p > 0.05) between the untreated and DBD-plasma-treated oysters. The results suggest that PMA/RT-qPCR could help distinguish HuNoV infectivity without negatively affecting oyster quality following >30 min treatment with DBD plasma. Moreover, the inactivation kinetics of nonthermal DBD plasma against HuNoV in fresh oysters might provide basic information for oyster processing and distribution.

scholarly journals Reel-to-Reel Atmospheric Pressure Dielectric Barrier Discharge (DBD) Plasma Treatment of Polypropylene Films

2017 ◽  
Vol 7 (4) ◽  
pp. 337 ◽  
Author(s):  
Lukas Seidelmann ◽  
James Bradley ◽  
Marina Ratova ◽  
Jonathan Hewitt ◽  
Jamie Moffat ◽  
...  
Keyword(s):  
Plasma Treatment ◽  
Dielectric Barrier Discharge ◽  
Atmospheric Pressure ◽  
Barrier Discharge ◽  
Dbd Plasma ◽  
Dielectric Barrier ◽  
Polypropylene Films

The effect of dielectric barrier discharge plasma treatment on the air drag force of polyacrylonitrile, polyethylene, polypropylene and polyethylene terephthalate yarns

2018 ◽  
Vol 89 (10) ◽  
pp. 1938-1951 ◽  
Author(s):  
Shuai Liu ◽  
Yanyu Su ◽  
Mengya Wu ◽  
Chunfeng Zhao ◽  
Dandan Yuan ◽  
...  
Keyword(s):  
Plasma Treatment ◽  
Dielectric Barrier Discharge ◽  
Polyethylene Terephthalate ◽  
Drag Force ◽  
Barrier Discharge ◽  
Chemical Fiber ◽  
Dbd Plasma ◽  
Air Drag ◽  
Dielectric Barrier ◽  
Air Jet

In this paper, atmospheric pressure dielectric barrier discharge (DBD) plasma was used to treat four kinds of chemical fiber yarns, namely polyacrylonitrile (PAN), polyethylene (PE), polypropylene (PP) and polyethylene terephthalate (PET), for which the air drag force, moisture regain and yarn diameter were measured. Compared with untreated samples, the air drags of treated PAN, PE, PP and PET yarns increased maximally by 10.7%, 43.0%, 40.0% and 18.9%, respectively, in the present experiments. A two-way analysis of variance and correlation analysis were performed to study the effect of plasma treatment on air drag and other properties of these four chemical fiber yarns. The combination of X-ray photoelectron spectroscopy analysis and the determination of the DBD plasma component can further enhance the understanding of the difference between DBD plasma treatment processes among these four chemical fiber yarns. This study provided the experimental basis to improve the air-jet weaving efficiency of chemical fiber fabrics.

scholarly journals The Efficiency of Atmospheric Dielectric Barrier Discharge Plasma against Escherichia coli and Bacillus cereus on Dried Laver (Porphyra tenera)

Foods ◽  
2020 ◽  
Vol 9 (8) ◽  
pp. 1013 ◽  
Author(s):  
Ji Yoon Kim ◽  
Eun Bi Jeon ◽  
Man-Seok Choi ◽  
Eun Ha Choi ◽  
Jun Sup Lim ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Bacillus Cereus ◽  
Dielectric Barrier Discharge ◽  
Barrier Discharge ◽  
Dbd Plasma ◽  
Dielectric Barrier ◽  
E Coli ◽  
Porphyra Tenera ◽  
Dried Laver ◽  
Atmospheric Dielectric Barrier Discharge

This study investigated the effects of atmospheric dielectric barrier discharge (DBD) plasma (1.1 kV, 43 kHz, 5–30 min, N2: 1.5 L/m) on the reduction of Escherichia coli and Bacillus cereus on dried laver. The reductions of E. coli and B. cereus by 5, 10, 20, and 30 min of DBD plasma were 0.56 and 0.24, 0.61 and 0.66, 0.76 and 1.24, and 1.02 and 1.38 log CFU/g, respectively. The D-value of E. coli and B. cereus was predicted as 29.80 and 20.53 min, respectively, using the Weibull model for E. coli (R2 = 0.95) and first-order kinetics for B. cereus (R2 = 0.94). After DBD plasma 5–30 min treatment, there was no change in pH (6.20–6.21) and this value was higher than the untreated dried laver (6.08). All sensory scores in DBD plasma-treated laver were determined as >6 points. The 30 min of DBD plasma is regarded as a novel intervention for the control of potential hazardous bacteria in dried laver.

Development of an industrial applicable dielectric barrier discharge (DBD) plasma treatment for improving bondability of poplar veneer

Holzforschung ◽  
2016 ◽  
Vol 70 (7) ◽  
pp. 683-690 ◽  
Author(s):  
Minzhi Chen ◽  
Rong Zhang ◽  
Lijuan Tang ◽  
Xiaoyan Zhou ◽  
Yang Li ◽  
...  
Keyword(s):  
Plasma Treatment ◽  
Dielectric Barrier Discharge ◽  
Industrial Application ◽  
Barrier Discharge ◽  
Wood Fiber ◽  
Polar Component ◽  
Surface Wetting ◽  
Dbd Plasma ◽  
Dielectric Barrier ◽  
Veneer Surface

Abstract Dielectric barrier discharge (DBD) plasma treatment in a larger scale, which has the potential for industrial application, was studied for modification of poplar veneer surface for enhancing its interface adhesion. Chemical property, morphology, surface wetting, adhesion property and the stability of the activation after plasma treatment were investigated. ESR, XPS, AFM, contact angle (CA), and shear strength test were carried out to evaluate the effect of plasma treatment. The following properties increased after treatment: the surface free radical concentration, O/C ratio, surface roughness of wood fiber, veneer surface wetting, and surface free energy. Consequently, the plywood composite prepared after plasma treatment showed higher adhesion strength than that prepared from untreated veneer. The best plywoods were obtained from veneers treated at processing power of 4.5 kW of DBD. The time-dependent analysis by surface wetting indicated a modified stability in the first two days after plasma treatment, after which the polar component of the surface decreased and its dispersive component kept the level observed after plasma treatment. In summary, veneer surface modification by DBD plasma is promising for industrial application.

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