|Chamber||30 ml plastic culture flasks containing E. coli in a fluid medium were used|
|Setup||coils were made up of 154 turns of copper wire with a diameter of 2.2 mm having inner and outer diameters of 40.5 and 45.5 cm, respectively; coils were placed in horizontal plane to produce vertically oriented magnetic field; distance between the coils was 21.375 cm; electrical parameters of the coils were resistance of 1.2 ohm and inductance of 19.6 mH; coils were driven with a variable transformer with a power of 2.7 kVA; system was mounted on a wooden frame; culture flasks were placed at the center of the coil-based exposure system (homogenous exposure region) in vertical position, so that the magnetic field was perpendicular to the bottom of the flasks|
|Sham exposure||A sham exposure was conducted.|
No significant differences between exposed and sham exposed cells were observed regarding cell viability. Furthermore, no significant influence of FeCl3 supplementation of the culture medium on the cell viability was found.
While the morphology of sham exposed cells appeared normal in the scanning microscopy, exposed cells showed structural damages such as various pores with different sizes on the cell membrane.
The authors conclude that 50 Hz magnetic fields do not influence the cell viability of Escherichia coli but could affect the surface morphology.