中文摘要：

高压输电线环境电磁场暴露健康效应的原初作用机制是阐述电磁健康的环节,是制修订我国环境电磁标准的重要基础。为此,对220kV的高压输电线环境电磁场进行了现场监测,将SD大鼠海马神经元暴露在瑞士IT’IS系统中,观察胞内活性氧自由基（ROS）、钙离子（Ca2＋）和线粒体膜电位（MMP）对磁感应强度为0.1mT、0.5mT和1.0mT的极低频电磁场的生物响应。研究结果表明：环境电场强度≤1kV/m,磁场磁感应强度≤1.5μT;神经元胞内活性氧自由基、钙离子、线粒体膜电位对磁感应强度≥0.1mT的磁场有生物反应。因此,电场能量密度和磁场能量密度可作为电磁健康效应的评价参数;ROS是电磁因果链原初作用中连接物理和生物解释的一个重要标志物;足够强度的电磁场才能对健康产生影响,笼统说＂电磁场对健康有影响＂会误导公众。

英文摘要：

We measured an environment electric and magnetic fields around 220 kV high voltage transmission line,and observed some responses of reactive oxygen species（ROS）,calcium（Ca2＋）,and the mitochondrial membrane potential（MMP） in the hippocampus neurons from SD rat exposed to 0.1 mT,0.5 mT and 1.0 mT extremely low frequency electromagnetic fields in IT＇IS system.Results show that the environment electric field is not more than 1 kV/m and the magnetic field is not more than 1.5 μT,and there are some ROS,Ca2＋,MMP responses in the neurons to magnetic field no less than 0.1 mT.So the electromagnetic energy may be an electromagnetic parameter for evaluation of health effects.ROS is a marker of electromagnetic health effects for physical explanation and a biological explanation.Only enough strength electromagnetic fields can affect health.