Discharge conditions for CW and pulse-modulated surface-wave plasmas in low-temperature sterilization

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公開日
2005-12-15
DOI
  • 10.1088/0022-3727/39/1/022
公開者
IOP Publishing

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説明

The discharge conditions required for low-temperature plasma sterilization were investigated using low-pressure surface-wave plasma (SWP). The discharge conditions for both continuous wave (CW) and pulse-modulated SWPs in low-temperature sterilization of Geobacillus stearothermophilus with a population of 1.5 ? 106 and 3.0 ? 106 were studied by varying the microwave input power from 500?W to 3?kW, and the effective plasma treatment time from 40 to 300?s. Results showed that sterilization was possible in a shorter treatment time using a higher microwave power for both CW and pulse-modulated SWPs. Pulse-modulated SWPs gave effective sterilization at a temperature roughly 10 to 20??C below that of CW SWPs under the same average microwave power.

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