1887

Abstract

SUMMARY

The importance of photon radiation for the microbicidal effect of electrical discharges in water has appeared from a series of experiments. () An ultraviolet (u.v.)-sensitive strain of was more susceptible to discharges than a u.v.-resistant mutant derived from it. () The kinetics of the inactivation by discharges were under certain conditions similar to those of continuous u.v. irradiation. () Addition of u.v.-absorbing substances to the discharge liquid decreased the bactericidal efficiency of the discharges to an extent which paralleled the u.v. absorbance. () The bactericidal effect decreased as the distance from the spark increased. () Bacteria enclosed in a cellophan bag were killed by discharges outside the bag, even when the bag was kept in the air above the discharge liquid. () Also discharges in air were active. () Bacteria inactivated by discharges were accessible to photoreactivation, but the magnitude of the reactivation was generally less than that obtained with bacteria inactivated by continuous u.v.-irradiation. In addition to direct radiation effects other kinds of microbicidal activities were produced by the electric discharges.

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/content/journal/micro/10.1099/00221287-50-2-261
1968-02-01
2024-04-26
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References

  1. Allen M., Soike K. 1966; Sterilization by electrohydraulic treatment. Science, N.Y 154:155
    [Google Scholar]
  2. Brandt B., Edebo L., Hedén C.-G., Hjortzberg-Nordlund B., Selin I., Tigerschiöld M. 1962; The effect of submerged electrical discharges on bacteria. TVF 29:222
    [Google Scholar]
  3. Edebo L., Selin I. 1968; The effect of the pressure shock wave and some electrical quantities in the microbicidal effect of transient electric arcs in aqueous systems. J. gen. Microbiol 50:253
    [Google Scholar]
  4. Jagger J., Stafford R. S. 1965; Evidence for two mechanisms of photoreactivation in Escherichia coli b. Biophys. J 5:75
    [Google Scholar]
  5. Marcovich H. 1956; Étude sur l’action des rayons ultraviolets sur les systems lysogène Escherichia coli k12 (λ), k12S, λ. Annls Inst. Pasteur 91:511
    [Google Scholar]
  6. McLaren A. D., Shugar D. 1964 Photochemistry of Proteins and Nucleic Acids Oxford: Pergamon Press;
    [Google Scholar]
  7. Rentschler H. C., Nagy R., Mouromseff G. 1941; Bactericidal effect of ultraviolet radiation. J. Bact 41:745
    [Google Scholar]
  8. Rupert C. S. 1964; Photoreactivation of ultraviolet damage. In Photophysiology Giese A. C. 283 New York: Acacemic Press;
    [Google Scholar]
  9. Setlow R. B., Swenson P. A., Carrier W. L. 1963; Thymine dimers and inhibition of DNA synthesis by ultraviolet irradiation of cells. Science, N. Y 142:1464
    [Google Scholar]
  10. Wacker A. 1963; Molecular mechanisms of radiation effects. Progr. Nucleic Acid Res 1:369
    [Google Scholar]
  11. Witkin E. 1964; Photoreversal and ‘dark repair’ of mutations to prototrophy induced by ultraviolet light in photoreactivable and non-photoreactivable strains of Escherichia coli . Mutation Res 1:22
    [Google Scholar]
  12. Zelle M. R., Hollaender A. 1955; Effects of radiation on bacteria. In Radiation Biology Hollaender A. 2365 New York: McGraw-Hill;
    [Google Scholar]
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