To investigate the influence of a 50 Hz-rotating magnetic field on the cell proliferation and cell viability of the two bacteria species Escherichia coli and Staphylococcus aureus depending on the exposure duration.
Exposure duration: continuous for up to 270 minutes (30, 60, 90, 120, 150, 180, 210, 240 or 270 minutes)
|Exposure duration||continuous for up to 270 minutes (30, 60, 90, 120, 150, 180, 210, 240 or 270 minutes)|
|Chamber||bacteria were exposed in 15 ml plastic tubes|
|Setup||setup consisted of a generator made of a stator of a three-phase asynchronical engine and a glass container filled with water (served as water bath for the test tubes); stator was made of stampings with slots to carry three-phase winding that were geometrically spaced 120° apart; generator produced electromotive force in the bulk of the glass container; magnetic field was generated by coils located around the cylinder and rotates about the cylinder axis with a constant angular frequency; temperature of water bath was 37°C ± 0.5°C|
|Sham exposure||A sham exposure was conducted.|
|magnetic flux density||30 mT||-||measured||-||-|
In exposed cell cultures, the cell proliferation and the cell viability was significantly increased compared to the control group. However, the observed effects were limited up to the time-point of 150 minutes.
The authors conclude that the observed stimulation of cell proliferation and cell viability in Escherichia coli and Staphylococcus aureus due to 50 Hz magnetic field exposure could have a negative influence in the case of pathogen treatment, but could have also a beneficial effect in biotechnologic cultivation methods.