Effect of the low-frequency magnetic fields on the living organisms

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Authors	STRAŠÁK Luděk FOJT Lukáš VETTERL Vladimír ŠMARDA Jan
Year of publication	2004
Type	Article in Proceedings
Conference	Biological effects of EMFs - 3rd international workshop
MU Faculty or unit	Faculty of Science
Citation
Field	Biophysics
Keywords	Low-frequency electromagnetic field; ELF magnetic fields; Bacteria; CFU number; Escherichia coli
Description	The effect of low-frequency magnetic fields on the bacteria Escherichia coli K12 Row is studied. Magnetic field was generated by the cylindrical coil (Bm =< 10mT, duration of exposure t=6 min, f=50 Hz). We tried to estimate the threshold value of the magnetic induction causing statistically significant biological effect. This value is about 0.7 mT. The dependence of the number of colony forming units (CFU) on the frequency showed the decrease of viability for all used frequencies (5-20 000 Hz). We tried to combine effect of magnetic field and UV irradiation. The ultraviolet rays kills bacteria in short time damaging their DNA. We found that magnetic field effect and UV effect are cumulative and additive. The targets of UV rays and magnetic fields in biological objects are probably different, so we can assume that magnetic field probably does not affects DNA of bacteria.
Related projects:	Application of biophysical methods in biotechnological and clinical praxis Interaction of biopolymers with ligands and detection of their conformation changes at interfaces by electrochemical and optical methods.