Volume 18, Issue 44 (10-2009)
Abstract
The increasing use of microwave appliances such as mobile phones in daily life has caused some anxiety about its possible effects on human health. In this study, we investigated the effects of microwave on the gonads and fertility rate of female Balb /C mouse. At first, an experimental generator microwave system was designed. Then, adult virgin females were exposed to waves for 4 days (6 hours per day) and their blood were applied for hormone assay of FSH, LH, estradiol, progesterone. The size and weight of ovaries were recorded and the structure and ultrastructure of them were examined by light and transmission electron microscope. Some females were placed in a cage with male individual of the same strain for mating, then the pregnancy rate was estimated and their offsprings were maintained in animal house until puberty. After puberty, ovaries were examined. The results did not show any significant difference in the size and weight of ovaries (P> 0.05), FSH, LH, estradiol, did not show change (P>0.05), but the results of transmission electron microscopy showed changes in ovary and follicle structure and also progesterone levels. The percentage of mating showed a significant reduction (P<0.05).
Volume 18, Issue 51 (5-2005)
Abstract
Long-term UVB and UVC irradiation can increase the skin cancer risk the researchers insist more on the carcinogenetic effect of UVB, but scale cells cancer of skin and malignant melanoma are caused by UVA radiation. Regard to broad use of UV (260nm) lamps in laboratory hoods, it is necessary to study the effect of UVC (260 nm) radiation on the skin. In this study, the effect of UVC radiation with wavelenght 260 nm on the skin and ear of one month and two months old Balb/c mice during 25, 50, and 100 hours exposure time have been investigated. The results show that UV (260nm) radiation increases the epidermis thickness. The other skin layers in both ages show alternate changes in different exposure times. Also, it may be concluded that the increase in hair follicles is not significant.
