Journal
MICRON
Volume 40, Issue 8, Pages 894-898Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.micron.2009.05.010
Keywords
Static magnetic fields; Escherichia coli; CFU; TEM; SEM
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This paper represents the study of the biological effects of static magnetic fields (SMFs) on Escherichia coli (E. coli). The bacterial strain E. coli was exposed to SMFs in order to test its viability (evaluated by the number of colony-forming units (CFU)). In this study, we measured the dependence of CFU on the duration of exposure, on the treatment temperature T and on the value of the magnetic field induction B. The results showed that the number of CFU decreased with longer exposure time and higher treatment temperature (from 25 degrees C to 40 degrees C), whereas multiple extreme values of number of CFU were obtained when the induction B changed. In order to explain the results, transmission electron microscopy (TEM) and scanning electron microscopy (SEM) were used to investigate the morphology of the cells. We found obvious cell surface damage when the cells were exposed to SMFs. (C) 2009 Elsevier Ltd. All rights reserved.
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