Disinfection of Microbes by Magnetized DC Plasma


A different combined effects for helium gas discharge such as: magnetic field strength, breakdown voltage, applied power, applied pressure, cathode fall thickness, edge effect, distribution of the electron temperature and density, and finally exposure time for Staphylococcus aureus substrate over slides at the cathode edge, are discussed under the influence of cold, nonthermal plasmas, ultra low pressure, and presence of the magnetic field for disinfection of bacteria for short exposure times, compatible to International Commission on Non-Ionizing Radiation Protection, Health Phys (ICNIRP) for healing applications. Furthermore, analyses of the experimental data of initial and final densities of cells alive, using survival curves, showed an impressive inhibitory effect of plasma discharge to the remaining survival of bacterial ratio under the influence of the magnetic field.

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Galaly, A. and Zahran, H. (2014) Disinfection of Microbes by Magnetized DC Plasma. Journal of Modern Physics, 5, 781-791. doi: 10.4236/jmp.2014.59088.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] Laroussi, M., Mendis, D.A. and Rosenberg, M. (2003) New Journal of Physics, 5, 41.
[2] Soloshenko, I.O., Khomich, V.A., Tsiolko, V.V., et al. (1999) Theoretical and experimental study of the factors of the sterilization of medical articles in low pressure glow discharge plasma Proceedings of the 14th International Symposium on Plasma Chemistry, Prague, 2-6 August 1999, 2551-2556.
[3] Soloshenko, I.A., Tsiolko, V.V. and Khomich, V.A. (2000) Plasma Physics Report, 26.
[4] Lu, X., et.al. (2008) Journal of Applied Physics, 104, Article ID: 053309.
[5] Singh, M.K., Ogino, A. and Nagatsu, M. (2009) New Journal of Physics, 11, Article ID: 115027.
[6] Vicoveanu, D., Ohtsu, Y. and Fujita, H. (2008) Japanese Journal of Applied Physics, 47, 1130.
[7] Laroussi, M. (2002) IEEE Transactions on Plasma Science, 30, 1409-1415.
[8] Kakikawa, M. and Yamada, S. (2012) IEEE Transactions on Magnetics, 48, 2869-2872.
[9] United States Pharmacopeial Convention (2007) The United States Pharmacopeia. 31st Edition, The United States Pharmacopeial Convention, Rockville.
[10] Directorate for the Quality of Medicines of the Council of Europe (EDQM) (2007) The European Pharmacopoeia. Council of Europe, Strasbourg.
[11] Laroussi, M. and Leipold, F. (2004) International Journal of Mass Spectrometry, 233, 81-86.
[12] Bohm, D. (1949) The Characteristics of Electrical Discharge in Magnetic Fields. McGraw-Hill, New York.
[13] Chapman, B. (1980) Glow Discharges Processes. Wiley, New York.
[14] Laroussi, M. (2005) Plasma Processes and Polymers, 2, 391-400.
[15] ICNIRP—International Commission on Non-Ionizing Radiation Protection (2004) Health Physics, 87, 171-186.
[16] Galaly, A.R. and El Akshar, F.F. (2013) Physica Scripta, 88, Article ID: 065503.
[17] Chen, F.F. (1965) Plasma Diagnostic Techniques. Academic, New York.
[18] Brown, S.C. (1966) Introduction to Electrical Discharges in Gases. Wiley, New York.
[19] Spasojevic, D., Steflekova, V., Sisovic, N.M. and Konjevic, N. (2012) Plasma Sources Science and Technology, 21, Article ID: 025006.
[20] Simonchikpp, L., Pitchfordpp, L. and Safronau, Y. (2012) Effect of the Cathode Surface Temperature on the Cathode Fall Layer Parameters ESCAMPIG xxi Conference, Viana do Castelo, 10-14 July 2012.
[21] Yasuda, H.K., Tao, W.H. and Prelas, M.A. (1996) Journal of Vacuum Science and Technology A, 14, 2113.
[22] Galaly, A.R. and El Akshar, F.F. (2013) Physica Scripta, 88, Article ID: 065503.
[23] Galaly, A.R. (2014) Determination of the Cathode Fall Thickness in the Magnetized DC Plasma for Helium Gas Discharge. Proceedings of the IMEPS, International Middle East Plasma Science Conference, Belek-Antalya, 23-25 April 2014.
[24] Galaly, A.R. and Zahran, H.H. (2013) Journal of Physics: Conference Series (IOP), 431, Article ID: 012014.
[25] Galaly, A.R. (2014) The Edge Effect of Magnetized DC-Plasma for E-coli Inactivation. Proceedings of the IMEPS, International Middle East Plasma Science Conference, Belek-Antalya, 23-25 April 2014.

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