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Patterns of bacterial destruction in solutions by microwave irradiation
Author(s) -
Fujikawa H.,
Ohta K.
Publication year - 1994
Publication title -
journal of applied bacteriology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.889
H-Index - 156
eISSN - 1365-2672
pISSN - 0021-8847
DOI - 10.1111/j.1365-2672.1994.tb01645.x
Subject(s) - irradiation , escherichia coli , bacillus cereus , growth curve (statistics) , microbiology and biotechnology , agar , pseudomonas fluorescens , microwave irradiation , staphylococcus aureus , biology , bacteria , agar plate , pseudomonas , chemistry , biochemistry , physics , mathematics , genetics , gene , nuclear physics , econometrics , catalysis
The patterns of destruction of several kinds of bacterial cells suspended in solutions by microwave irradiation were studied. The survival curves of Escherichia coli and Staphylococcus aureus were similar and approximated a set of three linear phases. The curves of Pseudomonas fluorescens and Bacillus cereus spores shifted to the shorter and longer irradiation periods, respectively. The rate constant and initial time of destruction for each linear phase of the survival curve were compared among these organisms. When irradiated E. coli cells were incubated in an agar with a high salt level, fewer cells were recovered. The curve of E. coli cells in the logarithmic phase of growth shifted to shorter exposure periods. There were no significant differences in the survival curves of E. coli cells grown at temperatures of 22–36°C, whereas the curve of cells grown at 44°C shifted to longer periods.