Authors : Nazanin Allahverdizadeh, Behzad Yasrebi, Alireza Andalib and Fatemeh Afshari
Abstract: In late years, many researchers have focused on the effects of Electromagnetic Fields (EMFs) on biological tissues. Although, the effects of EMF on live tissues were shown in many studies but even now there is many questions that are not replied. The aim of the present study, is to design and construct an EMF exposure system which can generate 10-100 Hz, 0.1-2 mT EMFs and then study the effects of 50 Hz, 0.1 mT EMF that was generated by this exposure system on kidney tissue of rats. The exposure system consisted of 4 square coils (Merritt 4 coils), the coils are 30 cm in width. About 2 outer coils were of 850 turns and 2 inner coils were of 360 turns of copper wire with 0.5 mm in diameter. The distance between 2 inner coils was 7.668 cm and the distance between inner coils and outer coils was 11.322 cm. The needed current was applied by a signal generator. In order to amplify the signal generator, a push-pull amplifier was designed and constructed. The field at the center of the coils was probed by a magnetic flux meter. To check the accuracy of the exposure system in generating effective EMFs, the effects of 50 Hz, 0.1 mT EMF on kidney tissue of rats were studied. For this purpose, 12 rats divided into 2 control and exposed groups randomly. Exposed rats (6 rats) were exposed to 0.1 mT, 50 Hz EMF, 6 h a day for 30 days. Control rats (6 rats) were housed in a separate room without exposure to EMF. After all applications, kidney tissue of rats was investigated under light microscope. The designed exposure system could generate variable magnetic flux at the center of coil system which could change from 0.1-2 mT in flux density and 10-100 Hz in frequency. Moreover, the microscopic studies on kidney tissues demonstrated that 0.1 mT, 50 Hz EMF affected kidney tissues and compared with control rats, Bowman’s capsule of exposed rats was altered. These results demonstrated that designed and constructed EMF exposure system could generate EMFs with different flux densities and frequencies. Also, the generated EMF by this exposure system could affect kidney tissue.
Nazanin Allahverdizadeh, Behzad Yasrebi, Alireza Andalib and Fatemeh Afshari, 2013. Design, Construction and Application of Effective Electromagnetic Field on Kidney Tissue. International Journal of Electrical and Power Engineering, 7: 83-87.