The present study is aimed to test whether exposure to electromagnetic fields of very weak intensity (≤1 mT) and low frequency (≤100 Hz) may influence reproductive performance and induce teratogenesis in mice. We sp...The present study is aimed to test whether exposure to electromagnetic fields of very weak intensity (≤1 mT) and low frequency (≤100 Hz) may influence reproductive performance and induce teratogenesis in mice. We speculate that a resonant effect occur when the applied frequency matches the cyclotron frequency of Mg<sup>2+</sup> (≈60 Hz) involved in the cell duplication. Four groups of mice (four dams and one male each) were exposed to ?50 μT electromagnetic field continuous irradiation of for 100 days. A control group (four dams and one male) was also examined. The exposed dams exhibited a significantly lower number of offspring per birth than the control ones (11.0 vs. 11.6;P = 0.006). A significantly lower average daily gain of body weight per mouse was observed (0.74 vs. 0.77 g/d;P = 0.002), resulting in a reduction of the average body weight per nest at 11 days of age (404 vs. 463 g;P = 0.048). Post mortem examinations revealed a significant increase in mild chronic hepatic inflammatory findings (28 vs. 0%;P = 0.001) in the offspring and myocardial hypertrophy (25 vs. 0%;P = 0.023) in the dams. The exposure of mice to an electromagnetic field with the cyclotron frequency of Mg2+ during pregnancy caused a measurable effect on the reproductive performance in terms of offspring per birth. This finding may be considered as a warning about the environmental effects of the electromagnetic fields on the stability of individual species and ecosystems.展开更多
目的评价黄南藏族自治州提高新生儿乙型肝炎疫苗(Hepatitis B Vaccine,HepB)首针(HepB1)及时接种率项目的可持续发展状况。方法比较项目结束后和项目执行期间,新生儿HepB1及时接种率的变化状况;评价项目执行期间所采取的各项措施的继续...目的评价黄南藏族自治州提高新生儿乙型肝炎疫苗(Hepatitis B Vaccine,HepB)首针(HepB1)及时接种率项目的可持续发展状况。方法比较项目结束后和项目执行期间,新生儿HepB1及时接种率的变化状况;评价项目执行期间所采取的各项措施的继续执行情况。结果项目结束后的18个月中,全州新生儿HepB1及时接种率均高于项目执行期间;各地仍在执行已制定的提高新生儿HepB1及时接种率的策略。结论黄南藏族自治州提高新生儿HepB1及时接种率项目有较好的可持续发展性。展开更多
文摘The present study is aimed to test whether exposure to electromagnetic fields of very weak intensity (≤1 mT) and low frequency (≤100 Hz) may influence reproductive performance and induce teratogenesis in mice. We speculate that a resonant effect occur when the applied frequency matches the cyclotron frequency of Mg<sup>2+</sup> (≈60 Hz) involved in the cell duplication. Four groups of mice (four dams and one male each) were exposed to ?50 μT electromagnetic field continuous irradiation of for 100 days. A control group (four dams and one male) was also examined. The exposed dams exhibited a significantly lower number of offspring per birth than the control ones (11.0 vs. 11.6;P = 0.006). A significantly lower average daily gain of body weight per mouse was observed (0.74 vs. 0.77 g/d;P = 0.002), resulting in a reduction of the average body weight per nest at 11 days of age (404 vs. 463 g;P = 0.048). Post mortem examinations revealed a significant increase in mild chronic hepatic inflammatory findings (28 vs. 0%;P = 0.001) in the offspring and myocardial hypertrophy (25 vs. 0%;P = 0.023) in the dams. The exposure of mice to an electromagnetic field with the cyclotron frequency of Mg2+ during pregnancy caused a measurable effect on the reproductive performance in terms of offspring per birth. This finding may be considered as a warning about the environmental effects of the electromagnetic fields on the stability of individual species and ecosystems.
文摘目的评价黄南藏族自治州提高新生儿乙型肝炎疫苗(Hepatitis B Vaccine,HepB)首针(HepB1)及时接种率项目的可持续发展状况。方法比较项目结束后和项目执行期间,新生儿HepB1及时接种率的变化状况;评价项目执行期间所采取的各项措施的继续执行情况。结果项目结束后的18个月中,全州新生儿HepB1及时接种率均高于项目执行期间;各地仍在执行已制定的提高新生儿HepB1及时接种率的策略。结论黄南藏族自治州提高新生儿HepB1及时接种率项目有较好的可持续发展性。
