Résumé
Electromagnetic fields [EMFs] are widely used for transmitting of radio, TV signals, and wireless communications. So a huge number of individuals suffering of risk from telecommunication technologies. The study of the biological effects of EMF could contribute to better understanding of the possible hea1thhazards. The objectives of this study were to describe the health status of electric occupational workers exposed to electric and magnetic fields [EMF5]. Measurements were performed in substations operating at 50 kV/m Workers occupationally exposed for more than 2 years to magnetic field approximately 17-18 micro T. One of the objectives of this study was the evaluation of EMFs effects on the antioxidative activity of plasma in worker's. Substation workers [60 males] of electric company and a control group [20 males] were compared in their hemoglobin [Hb] concentration, Hb electrical conductivity, thermodynamic parameters of Hb and other biochemical factors. Hemoglobin concentration percentage and electric conductivity were measured according to the duration of exposure . Also there was a decrease in spin state constant for different groups of workers, and an increase in free energy as compared to control . Superoxide dismutase [SOD], Glutathioneperoxidase [GSH-PX] activities were decreased specially in labor exposed for a long time but Catalase activity [CAT] increased in workers exposed to 10-15 years . There was also an increase in activation energy for all group of workers . All changes observed among workers exposed to EMFs from electric substations result in inadaptable response for controlling the balance of human body oxidative mechanisms, thus the risk factor of cancer and Alzhcimer will be enhanced