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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >The antibacterial activity of a microwave argon plasma jet at atmospheric pressure relies mainly on UV-C radiations
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The antibacterial activity of a microwave argon plasma jet at atmospheric pressure relies mainly on UV-C radiations

机译：微波氩等离子体射流在大气压下的抗菌活性主要取决于UV-C辐射

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摘要

The main bactericidal sources produced by a microwave induced cold argon plasma jet in open air are identified and their relative proportion in the biocide efficiency of the jet is assessed on planktonic Gram-negative bacteria (wild-type strains and deletion mutants of Escherichia coli) diluted in water. In these conditions ultraviolet light (UV) most probably in the UV-C region of the electromagnetic spectrum, is responsible for 86.7 ± 3.2% of the observed bactericidal efficiency of the jet whereas hydrogen peroxide represents 9.9 ± 5.5% of it. The exposition level of the bacteria to UV-C radiations is estimated at 20 mJ cm~(-2) using a specific photodiode and the influence of the initial bacteria concentration on the apparent antibacterial efficiency of the jet is highlighted.
机译：鉴定了由微波诱导的冷氩等离子体射流在露天产生的主要杀菌源，并在稀释的浮游革兰氏阴性细菌（大肠杆菌的野生型菌株和缺失突变体）上评估了它们在射流杀生效率中的相对比例。在水里。在这些条件下，紫外线（UV）最有可能在电磁波谱的UV-C区域内，占喷流杀菌效率的86.7±3.2％，而过氧化氢则占9.9±5.5％。使用特定的光电二极管估计细菌在UV-C辐射下的暴露水平为20 mJ cm〜（-2），并且突出了初始细菌浓度对射流表观抗菌效率的影响。

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