Cold atmospheric argon plasma treatment is potentially a safe and painless new technique to decrease bacterial load of chronic wounds and promote healing.

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Interaction of ultraviolet laser with a silicon carbide plume produced by laser ablation

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Eighteen single mode fibres doped with different Rare Earth elements are exposed to 6oCo gamma radiation in order to estimate the radiation sensitivity of fibre amplifiers or fibre lasers and to find fibres with extremely high loss increase that are suited for dosimetry of low radiation levels.Induced loss measurements with varying dose rate confirmed the applicability of a simple dose rate tranformation method also to Rare Earth doped fibres.Operation of a ,,distributed" fibre optic radiation sensor is demonstrated at a dose rate of less than 0.1 Gy/d.

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Chemical characteristics and bactericidal properties of two low-temperature atmosphericpressure Ar plasma devices are investigated: one of them with UV and the other with almost no UV on treated samples. The control of the UV radiation is achieved by two nozzles. One has a straight shape, and the other has a 908-bent. The bent nozzle blocks the light produced inside the torch, whilst allowing the plasma gas to reach the samples. The use of the straight nozzle allows the treatment by both the plasma gas and UV. We demonstrate that even an almost UV-free plasma treatment has bactericidal properties. Our measurements suggest that reactive species represent the main bactericidal factor of our low-temperature plasma.