Santini M T, Cametti C, Straface E, Grandolfo M, Indovina P L
Laboratorio di Ultrastrutture, Istituto Superiore di Sanità, Rome, Italy.
Int J Radiat Biol. 1994 Feb;65(2):277-84. doi: 10.1080/09553009414550311.
We have recently demonstrated using dielectic relaxation studies in the radiowave frequency range that sinusoidal 50 Hz magnetic fields (with intensities ranging from 1 to 10 mT) induce a nonlinear change in both membrane conductivity and permittivity of primary chick embryo myoblasts in vitro. It was the aim of the present study to determine if a DC-induced static magnetic field is capable of generating similar variations in the membrane conductivity and/or the membrane permittivity of chick embryo myoblasts. The results indicate that when the myogenic cells are exposed to a static magnetic field of either 1, 3 or 5 mT (values comparable with the previous extremely low frequency study), no changes in the membrane electrical parameters can be observed with respect to controls. Differences in the characteristics of static and extremely low frequency fields as well as the possible mechanisms underlying the contrasting results with these two types of magnetic fields are discussed.
我们最近通过在射频频率范围内的介电弛豫研究表明，正弦50Hz磁场（强度范围为1至10mT）在体外诱导原代鸡胚成肌细胞的膜电导率和电容率发生非线性变化。本研究的目的是确定直流感应静磁场是否能够在鸡胚成肌细胞的膜电导率和/或膜电容率中产生类似的变化。结果表明，当肌源性细胞暴露于1、3或5mT的静磁场中（这些值与之前的极低频研究相当），相对于对照组，膜电参数未观察到变化。讨论了静磁场和极低频磁场特性的差异以及这两种类型磁场产生对比结果的潜在机制。
