Effects of different electromagnetic fields on circadian rhythms of some haematochemical parameters in rats / 生物医学与环境科学（英文）

<p><b>OBJECTIVE</b>To investigate the effects of different electromagnetic fields on some haematochemical parameters of circadian rhythms in Sprague-Dawley rats.</p><p><b>METHODS</b>The study was carried out in 18 male and 18 female rats in good health conditions exposed to 50 Hz magnetic sinusoid fields at the intensity of 1000 microT, 100 microT, and 0 microT (control group) respectively, and in 18 male and 18 female rats in good health conditions exposed to 1.8 GHz electromagnetic fields at the intensity of 50 V/m, 25 V/m and 0 V/m (control group), respectively. Following haematochemical parameters for glucose, triglycerides, and total cholesterol were measured.</p><p><b>RESULTS</b>Different effects of electromagnetic fields on circadian rhythms of both male and female rats were observed. Different changes occurred in some haematochemical parameters for glucose, triglycerides, and total cholesterol (P < 0.05).</p><p><b>CONCLUSION</b>Exposure to different electromagnetic fields is responsible for the variations of some haematochemical parameters in rats.</p>

Effects of exposure to extremely low frequency electro-magnetic fields on circadian rhythms and distribution of some leukocyte differentiation antigens in dairy cows / 生物医学与环境科学（英文）

<p><b>OBJECTIVE</b>To investigate the effects of extremely low frequency magnetic and electric fields (ELFEMFs) emitted from 380 kV transmission lines on some leukocyte differentiation antigens in dairy cows.</p><p><b>METHODS</b>The study was carried out in 5 cows exposed to 1.98-3.28 microT of ELFEMFs and in 5 control cows exposed to 0.2-0.7 microT of ELFEMFs. Following haematological and immunologic parameters were measured in both groups: WBC, CD45R, CD6, CD4, CD8, CD21, and CD11B leukocyte antigen expression.</p><p><b>RESULTS</b>Some of the haematological and immunologic parameters under investigation were similar in both groups. However, CD8 (T lymphocyte surface antigen) was higher in the exposed group (1.35 +/- 0.120 vs. 0.50 +/- 0.14 x 10(3)/mL). Furthermore, the CD4/CD8 ratio (0.84 +/- 0.05 and 2.19 +/- 0.16 for exposed and not exposed cows respectively) and circadian rhythm were different between the two groups.</p><p><b>CONCLUSION</b>Exposure to ELFEMFs is responsible of the abnormal temporal variations and distribution of some haematological and immunological parameters in dairy cows.</p>