Galt S, Sandblom J, Hamnerius Y
Department of Applied Electron Physics, Chalmers University of Technology, Göteborg, Sweden.
Bioelectromagnetics. 1993;14(4):299-314. doi: 10.1002/bem.2250140403.
Numerical solutions are presented to the equation of motion for an ion confined to a region of space by a restoring force and subject to DC and AC magnetic fields. We have expanded on the theoretical work of Durney et al. [1988] by including a potential well as a confining factor. This additional term in the equation of motion, being nondissipative, could allow for the buildup of stored energy within the system to a level necessary for a macroscopic resonant phenomenon. Resonant behaviour has been studied, including calculation of the trajectory and energy (kinetic and potential) of a confined ion, with emphases on the appearance of both amplitude and frequency windows. The results are discussed in relation to ion transport through transmembrane channels exposed to magnetic fields. When realistic values of the frictional and restoring-force coefficients are considered, all predicted resonant behaviour disappears, except at very high field strengths.
给出了一个离子在恢复力作用下被限制在一定空间区域内，并受到直流和交流磁场作用时的运动方程的数值解。我们在Durney等人[1988年]的理论工作基础上进行了扩展，纳入了一个势阱作为限制因素。运动方程中的这一附加项是非耗散的，它可能使系统内的储能积累到宏观共振现象所需的水平。对共振行为进行了研究，包括计算被限制离子的轨迹和能量（动能和势能），重点关注振幅和频率窗口的出现情况。结合离子通过暴露于磁场中的跨膜通道的输运情况对结果进行了讨论。当考虑摩擦系数和恢复力系数的实际值时，除了在非常高的场强下，所有预测的共振行为都会消失。
