One-Dimensional Modeling on the Asymmetric Features of a Radio-Frequency Atmospheric Helium Glow Discharge Produced Using a Co-Axial-Type Plasma Generator

Wang, Zhibin; Le, Pei-Si; Gao, Nan; Nie, Qiulin; Li, He Ping; Bao, Cheng-Yu

doi:10.1007/s11090-012-9367-y

Cited by 8 publications

(13 citation statements)

References 21 publications

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“…In our previous studies, a radio-frequency, atmospheric-pressure glow discharge (RF-APGD) plasma jet using a water-cooled, bare-metallic electrode configuration has been developed for the genome mutation of micro-organisms [1,21]. Our studies showed that the RF-APGD was a uniform glow discharge with no filaments, and the gas temperatures were low and controllable by adjusting the operating conditions appropriately [21][22][23][24]. In this study, by adjusting the RF power input and the temperature of the plasma working gas at the inlet of the plasma generator, the gas temperature of the plasma jet can be controlled at a little bit lower level than the room temperature, which means that the heat accumulation inside the treated samples can be avoided during the plasma treatment process.…”

Section: Introductionmentioning

confidence: 99%

Influences of the cold atmospheric plasma jet treatment on the properties of the demineralized dentin surfaces

Zhu¹,

Guo²,

Zhou³

et al. 2018

Plasma Sci. Technol.

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Section: Introductionmentioning

confidence: 99%

Influences of the cold atmospheric plasma jet treatment on the properties of the demineralized dentin surfaces

Zhu¹,

Guo²,

Zhou³

et al. 2018

Plasma Sci. Technol.

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“…Although some numerical simulation results on the features in the discharge region of the RF APGD plasmas have been published, most of the authors focused on the chemical reaction processes, while the energy exchange process between the electrons and heavy particles in the plasmas were seldom considered (e.g., Refs. [4][5][6][7][8][9][10]). However, for the typical RF APGDs, the RF power input usually ranges from tens to hundreds Watts [11,12] ; and thus, the gas temperature may be significantly higher than the room temperature resulted from the frequent collisions between the electrons and heavy particles in the plasma system.…”

Section: Introductionmentioning

confidence: 99%

Influences of gas flowing on the features of a helium radio-frequency atmospheric-pressure glow discharge

Zhang

Wang

Nie

et al. 2014

Applied Thermal Engineering

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In this paper, a zoning model is employed to investigate the influences of gas flowing on the characteristics of the high-purity helium radio-frequency atmospheric-pressure glow discharge (RF APGD) plasma. The modeling results show that the influences of the gas flowing on the plasma features in the discharge region and the jet region are different. In the discharge region, the heavy-particle temperature decreases with the increase of helium flow rate, while the variations of the electron energy and the species concentrations are less than 0.5%. In the plasma jet region, the variation of the heavy-particle temperature shows a non-monotonous form with the gas flow rate, while the species concentrations become higher within a certain distance (e.g., smaller than 2 mm away from the plasma generator exit) at a higher helium flow rate. The modeling results are also qualitatively validated by comparing with the measured gas temperatures in both the discharge region and the plasma jet region. KEYWORDS atmospheric-pressure plasma; radio-frequency glow discharge; gas flowing; non-equilibrium feature; modeling

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“…The continuously flowing gas seldom mixes with the surrounding air, thereby minimizing the production of germicidal ozone. It has been reported that the generation of reactive chemical species (He*, He 2 *, He + , He 2 + , and N 2 + ) was considered as the biggest cause of physical plasma mutagenesis [28,29], and therefore requires careful adjustment of the plasma-generating parameters. The ARTP manufacturer provides a standard value for each adjustable parameter to meet the conditions of biocompatibility and produce enough active chemical substances [9].…”

Section: Artp Mutagenesis and Screeningmentioning

confidence: 99%

Improved Neomycin Sulfate Potency in Streptomyces fradiae Using Atmospheric and Room Temperature Plasma (ARTP) Mutagenesis and Fermentation Medium Optimization

Zhang

Sun

et al. 2022

Microorganisms

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To improve the screening efficiency of high-yield neomycin sulfate (NM) Streptomyces fradiae strains after mutagenesis, a high-throughput screening method using streptomycin resistance prescreening (8 μg/mL) and a 24-deep well plates/microplate reader (trypan blue spectrophotometry) rescreening strategy was developed. Using this approach, we identified a high-producing NM mutant strain, Sf6-2, via six rounds of atmospheric and room temperature plasma (ARTP) mutagenesis and screening. The mutant displayed a NM potency of 7780 ± 110 U/mL and remarkably stable genetic properties over six generations. Furthermore, the key components (soluble starch, peptone, and (NH4)2SO4) affecting NM potency in fermentation medium were selected using Plackett-Burman and optimized by Box-Behnken designs. Finally, the NM potency of Sf6-2 was increased to 10,849 ± 141 U/mL at the optimal concentration of each factor (73.98 g/L, 9.23 g/L, and 5.99 g/L, respectively), and it exhibited about a 40% and 100% enhancement when compared with before optimization conditions and the wild-type strain, respectively. In this study, we provide a new S. fradiae NM production strategy and generate valuable insights for the breeding and screening of other microorganisms.

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One-Dimensional Modeling on the Asymmetric Features of a Radio-Frequency Atmospheric Helium Glow Discharge Produced Using a Co-Axial-Type Plasma Generator

Cited by 8 publications

References 21 publications

Influences of the cold atmospheric plasma jet treatment on the properties of the demineralized dentin surfaces

Influences of the cold atmospheric plasma jet treatment on the properties of the demineralized dentin surfaces

Influences of gas flowing on the features of a helium radio-frequency atmospheric-pressure glow discharge

Improved Neomycin Sulfate Potency in Streptomyces fradiae Using Atmospheric and Room Temperature Plasma (ARTP) Mutagenesis and Fermentation Medium Optimization

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