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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Rectification and signal averaging of weak electric fields by biological cells.
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Rectification and signal averaging of weak electric fields by biological cells.

机译：生物细胞对弱电场的整流和信号平均。

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摘要

Oscillating electric fields can be rectified by proteins in cell membranes to give rise to a dc transport of a substance across the membrane or a net conversion of a substrate to a product. This provides a basis for signal averaging and may be important for understanding the effects of weak extremely low frequency (ELF) electric fields on cellular systems. We consider the limits imposed by thermal and "excess" biological noise on the magnitude and exposure duration of such electric field-induced membrane activity. Under certain circumstances, the excess noise leads to an increase in the signal-to-noise ratio in a manner similar to processes labeled "stochastic resonance." Numerical results indicate that it is difficult to reconcile biological effects with low field strengths.
机译：振荡电场可以通过细胞膜中的蛋白质进行整流，从而引起物质在膜上的直流输运，或者将底物净转化为产物。这为信号平均提供了基础，对于理解微弱的极低频（ELF）电场对蜂窝系统的影响可能很重要。我们考虑到热和“过量”生物噪声对这种电场诱导的膜活性的大小和暴露持续时间施加的限制。在某些情况下，多余的噪声会以类似于标记为“随机共振”的过程的方式导致信噪比的增加。数值结果表明，在低场强下很难协调生物学效应。

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