The major aim of this work was the evaluation of a new plasma based inactivation method for packaging materials made of plastic. The set-up was the cascaded dielectric barrier discharge (CDBD), which combines generation of intensive monochromatic UV light with a reactive plasma. The inactivation efficiency of the CDBD was determined for various process gases and a wide spectrum of micro-organisms. Furthermore, optimization efforts for the test strain A. niger were implemented by varying the relative humidity of the process gas and the integrated excimer flat lamp. Further aspects of this work were the influence of a CDBD treatment on the properties of the packaging material and the investigation of the inactivation mechanisms. Generally, the studies have shown that optimized CDBD with air as process gas is a promising and effective method for the inactivation of micro-organisms on surfaces.
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The major aim of this work was the evaluation of a new plasma based inactivation method for packaging materials made of plastic. The set-up was the cascaded dielectric barrier discharge (CDBD), which combines generation of intensive monochromatic UV light with a reactive plasma. The inactivation efficiency of the CDBD was determined for various process gases and a wide spectrum of micro-organisms. Furthermore, optimization efforts for the test strain A. niger were implemented by varying the rela...
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