Guest guest Posted October 6, 2007 Report Share Posted October 6, 2007 Hi everyone, Have recently come across an effect that may help explain the ability of frequency devices to create physiologic effects. Especially physiologic effects far removed from the area of maximum field strength. It seems that cell membranes have the ability to amplify electrical signals - by many thousands of times! This process may possibly help explain how the very limited power of electrode devices can have such far reaching and dramatic physiologic effects. This effect should also play an important role in demodulation of transmitted fields - the cell membrane is a place where demoduation occurs - and thus it may be possible for the demodulated signal to not just be demodulated, but the demodulated signal to be simultaneously amplified significantly! Here is an abstract on the process: there are many other papers on this process. Second-order model of membrane electric field induced by alternating external electric fields Kotnik, T.; Miklavcic, D. Biomedical Engineering, IEEE Transactions on Volume 47, Issue 8, Aug 2000 Page(s):1074 - 1081 Digital Object Identifier 10.1109/10.855935 Summary:With biological cells exposed to ac electric fields below 100 kHz, external field is amplified in the cell membrane by a factor of several thousands (low-frequency plateau), while above 100 kHz, this amplification gradually decreases with frequency. Below 10 MHz, this situation is well described by the established first-order theory which treats the cytoplasm and the external medium as pure conductors. At higher frequencies, capacitive properties of the cytoplasm and the external medium become increasingly important and thus must be accounted for. This leads to a broader, second-order model, which is treated in detail in this paper. Unlike the first-order model, this model shows that above 10 MHz, the membrane field amplification stops decreasing and levels off again in the range of tens (high-frequency plateau). Existence of the high-frequency plateau could have an important impact on present theories of high-frequency electric fields effects on cells and their membranes. Quote Link to comment Share on other sites More sharing options...
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