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A remote exposure reactor (RER) for plasma processing and sterilization by plasma active species at one atmosphere

A remote exposure reactor (RER) for plasma processing and sterilization by plasma active species at one atmosphere,10.1109/27.842864,IEEE Transactions

A remote exposure reactor (RER) for plasma processing and sterilization by plasma active species at one atmosphere   (Citations: 39)
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We have developed a remote exposure reactor (RER) in which the active species of air and other gases responsible for sterilization and processing effects are generated on flat panels in a surface layer of one atmosphere uniform glow discharge plasma (OAUGDP). These active species are convected by forced airflow at one atmosphere and near room temperature to a remote exposure chamber in which the workpiece is located. This allows workpieces of any size or shape to be sterilized or processed without direct contact with the plasma. Here, we report operation of the RER as a sterilizer with both single-pass and recirculating active species flow through the remote exposure chamber. We used the RER to reduce the numbers of two genera of microorganisms (Esherichia coli and Staphylococcus aureus) on test samples of polypropylene fabric. When the recirculating airflow configuration was employed, the population both of E. coli and S. aureas cells was reduced by at least five decades after only 25 s of exposure. Tests in the single pass airflow configuration produced similar results, with the E. coli and S. aureas populations decreased by at least four decades after 25 s of exposure
Journal: IEEE Transactions on Plasma Science - IEEE TRANS PLASMA SCI , vol. 28, no. 1, pp. 56-63, 2000
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    • ...Whilethisisa considerable improvement overprevious pencil-beam atmospheric discharge plasmaapplicators, practical considerations forrealistic CBRN utilization wouldrequire anapplicator withsignificantly larger active area. 2.ATMOSPHERIC DISCHARGE COLDPLASMA...
    • ...A proof-of-principle prototype is showninfigure 2...
    • ...A proof-of-principle prototype is showninfigure 2. Figure 2- Proof-of-Principle Prototype...
    • ...Thecombined plasma footprint ofthenineemitters isroughly 2.5mm wideby60mm long, or150mm2(1.5 cm2)...

    Gregory Konesky. CBRN Decontamination using a Large-Area Cold Plasma Applicator

    • ...The MOD V reactor, operating with an air plasma, can reduce the number of microorganisms by a factor of one million (i.e., achieve sterilization) after a few tens of seconds of exposure [37], [41], [42]...
    • ...In Fig. 26, the result of a test of the MOD V reactor with a remotely placed sample of E. coli is shown [37]...

    J. Reece Rothet al. The One Atmosphere Uniform Glow Discharge Plasma (OAUGDP)—A Platform T...

    • ...Plasmas have been considered for sterilization applications [15], [16]...

    Spencer P. Kuoet al. Killing of Bacterial Spores Contained in a Paper Envelope by a Microwa...

    • ...Also, the one-atmosphere uniform-glow discharge-plasma (OAUGDP) has been investigated for the sterilization of biological agents by Wintenberg et al. [1] and Roth et al. [6]...

    Y. C. Honget al. Decomposition of phosgene by microwave plasma-torch generated at atmos...

    • ...Such systems have been used for sterilization of surfaces, for biochemical surface functionalization, and for many other new applications [6-13]...
    • ...Our initial experiments have shown that such plasma treatment hastens blood coagulation and causes simultaneous wound sterilization (probably via a large concentration of chemically active species in plasma [10-13] that are ions, radicals (O, OH, N) and electronically-excited atoms and molecules [1-6])...
    • ...Sterilization effects of non-thermal plasma are well-known [10- 13] and were confirmed, for example, in our research with NASA Jet Propulsion Lab [14]...

    Gregory Fridmanet al. Use of Non-Thermal Atmospheric Pressure Plasma Discharge for Coagulati...

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