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Influence of a plasma jet on the viability ofCandida albicans

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Moravský L., Klas M., Machová E., Pisklová K., Matejčík Š.
Open Chemistry
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2015
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vol. 13
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issue 1
EN
A rapid growth of interest in low temperature plasma in medicine in recent years has given a rise to a number of different applications. We report a low cost kHz driven argon plasma jet with flow rate less than 0.15 L min-1 suitable for treatment of small areas infected with the wide-spread yeast pathogen Candida albicans. The plasma jet has been applied for inactivation of C. albicans seeded on an agar surface as well as yeast suspensions. The effects of different treatment parameters (gas composition, distance and treatment time) have been studied on the efficiency of yeast inactivation. C. albicans viability was evaluated by XTT assay and by measuring diameters of circular transparent zones.
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Time resolved optical emission spectroscopy in power modulated atmospheric pressure plasma jet

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Hnilica J., Potočňáková L., Kudrle V.
Open Chemistry
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2015
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vol. 13
|
issue 1
EN
In this paper, the effects of the power modulation on atmospheric pressure plasma jet, operated in Ar+2%N2 mixture, are studied. Time resolved optical emission spectroscopy is used for the investigation. From line and band intensities, the excitation, vibration and rotation temperatures are calculated. Their evolution during the modulation period exhibits a strong dependence on modulation frequency. For higher modulation frequencies, there is significant discrepancy in rotational temperatures calculated from OH spectra and from N2+ spectra, which indicates that thermalisation time can reach milliseconds.
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