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Abstract
In this work, the effect of extremely low frequency (ELF) and low intensity magnetic field on the biological systems was studied due to its existence every where in the environment from the electric appliances.
To have clear evaluation of the magnetic field effects on biological systems, the study should be carried out on the molecular level including the cell membrane and the intracellular contents. The choice was to carry the investigations on microorganisms E-coli which are single cells have all metabolic activities.
Therefore, the aim of the present work is to study the effect of 50 Hz magnetic field of strength 2 mT on E. coli bacteria cells (for the direct and recovery study). Equal volumes of E. coli suspension were exposed to the magnetic field for different periods (2, 4, 6, 8… 22 hrs) after that the growth characteristic curves was carried out, from this curve the two most effetive periods, namely, 6 hr and 16 hr were chosen for all our experimental studies.