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Photoelectrochemical sterilization of microbial cells by semiconductor powders

Photoelectrochemical sterilization of microbial cells by semiconductor powders Summary We report the novel concept of photochemical sterilization. Microbial cells were killed photoelectrochemically with semiconductor powder (platinum-loaded titanium oxide, TiO2/Pt). Coenzyme A, (CoA) in the whole cells was photo-electrochemically oxidized and, as a result, the respiration of cells was inhibited. Inhibition of respiratory activity caused death of the cells. Lactobacillus acidophilus, Saccharomyces cerevisiae and Escherichia coli (103 cells/ml respectively) were completely sterilized when they were incubated with TiO2/Pt particles under metal halide lamp irradiation for 60–120 min. Sterilization, semiconductor, Saccharomyces cerevisiae, coenzyme A References [1] Matsunaga T. Namba Y. ( 1984 ) Anal. Chem. 56 , 798 . Crossref Search ADS PubMed [2] Matsunaga T. Namba Y. ( 1984 ) Anal. Chim. Acta 159 , 87 . Crossref Search ADS [3] Matsunaga T. Namba Y. Nakajima T. ( 1985 ) Bioelectrochem. Bioenerg. , in press . [4] Fujishima A. Honda K. ( 1972 ) Nature 238 , 37 . Crossref Search ADS PubMed [5] Schrauzer G.N. Guth T.K. ( 1977 ) J. Am. Chem. Soc. 99 , 7189 . Crossref Search ADS [6] Frank S.N. Bard A.J. ( 1977 ) J. Phys. Chem. 81 , 1484 . Crossref Search ADS [7] Kraentler B. Bard A.J. ( 1978 ) J. Am. Chem. Soc. 100 , 239 . [8] Stadtman E.R. Novelle G.D. Lipman F.J. ( 1951 ) J. Biol. Chem. 191 , 365 . PubMed This content is only available as a PDF. © 1985 Federation of European Microbiological Societies http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png FEMS Microbiology Letters Oxford University Press

Photoelectrochemical sterilization of microbial cells by semiconductor powders

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References (6)

Publisher
Oxford University Press
Copyright
© 1985 Federation of European Microbiological Societies
ISSN
0378-1097
eISSN
1574-6968
DOI
10.1111/j.1574-6968.1985.tb00864.x
Publisher site
See Article on Publisher Site

Abstract

Summary We report the novel concept of photochemical sterilization. Microbial cells were killed photoelectrochemically with semiconductor powder (platinum-loaded titanium oxide, TiO2/Pt). Coenzyme A, (CoA) in the whole cells was photo-electrochemically oxidized and, as a result, the respiration of cells was inhibited. Inhibition of respiratory activity caused death of the cells. Lactobacillus acidophilus, Saccharomyces cerevisiae and Escherichia coli (103 cells/ml respectively) were completely sterilized when they were incubated with TiO2/Pt particles under metal halide lamp irradiation for 60–120 min. Sterilization, semiconductor, Saccharomyces cerevisiae, coenzyme A References [1] Matsunaga T. Namba Y. ( 1984 ) Anal. Chem. 56 , 798 . Crossref Search ADS PubMed [2] Matsunaga T. Namba Y. ( 1984 ) Anal. Chim. Acta 159 , 87 . Crossref Search ADS [3] Matsunaga T. Namba Y. Nakajima T. ( 1985 ) Bioelectrochem. Bioenerg. , in press . [4] Fujishima A. Honda K. ( 1972 ) Nature 238 , 37 . Crossref Search ADS PubMed [5] Schrauzer G.N. Guth T.K. ( 1977 ) J. Am. Chem. Soc. 99 , 7189 . Crossref Search ADS [6] Frank S.N. Bard A.J. ( 1977 ) J. Phys. Chem. 81 , 1484 . Crossref Search ADS [7] Kraentler B. Bard A.J. ( 1978 ) J. Am. Chem. Soc. 100 , 239 . [8] Stadtman E.R. Novelle G.D. Lipman F.J. ( 1951 ) J. Biol. Chem. 191 , 365 . PubMed This content is only available as a PDF. © 1985 Federation of European Microbiological Societies

Journal

FEMS Microbiology Letters – Oxford University Press

Published: Aug 1, 1985

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