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19 Mar 2012

Volume 100, Issue 12, Articles (12xxxx)

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Appl. Phys. Lett. 100, 121101 (2012); http://dx.doi.org/10.1063/1.3693413 (4 pages)

Jolly Xavier, Raktim Dasgupta, Sunita Ahlawat, Joby Joseph, and Pradeep Kumar Gupta
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An evaluation of anti-oxidative protection for cells against atmospheric pressure cold plasma treatment

Ruonan Ma, Hongqing Feng, Fangting Li, Yongdong Liang, Qian Zhang, Weidong Zhu, Jue Zhang, Kurt H. Becker, and Jing Fang

Appl. Phys. Lett. 100, 123701 (2012); http://dx.doi.org/10.1063/1.3693165 (4 pages) | Cited 1 time

Online Publication Date: 20 March 2012

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With the development of plasma medicine, safety issues are emerging as a serious concern. In this study, both intracellular (genetic engineering) and extracellular (scavengers) measures were tested in an effort to determine the best protection for cells against plasma-induced oxidative stress. All results of immediate reactive species detection, short term survival and long term proliferation, suggest that intracellular pathways are superior in reducing oxidative stress and cell death. This work provides a potential mechanism to enhance safety and identifies precautionary measures that should be taken in future clinical applications of plasmas.
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87.55.-x Treatment strategy
87.17.-d Cell processes
52.77.-j Plasma applications

Are all atmospheric pressure cold plasma jets electrically driven?

YuBin Xian, XinPei Lu, ShuQun Wu, Paul K. Chu, and Yuan Pan

Appl. Phys. Lett. 100, 123702 (2012); http://dx.doi.org/10.1063/1.3696889 (4 pages) | Cited 2 times

Online Publication Date: 23 March 2012

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Up to now, all studies on the dynamics behavior of non-equilibrium plasma plumes were focussed on noble gas plasma plumes. It was found out that they are electrically driven rather than gas flow dependent. Our study on the dynamics of a non-equilibrium N2 plasma plume reveals that the propagation velocity of the N2 plasma plume is several orders magnitude lower than those previously reported and further studies show that it is close to the gas flow velocity. The gas flow has a significant effect on the length of the plasma plume, and the results provide some fundamental knowledge about atmospheric pressure plasma jets.
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52.30.-q Plasma dynamics and flow
52.75.-d Plasma devices
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