An Assessment of Potential Health Effects from Exposure to PAVE PAWS Low-Level Phased-Array Radiofrequency Energy (2005) / Chapter Skim
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3 Physical Mechanisms for RF Effects on Biological Systems
3 Physical Mechanisms for RF Effects on Biological Systems
Pages 31-36
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From page 31... ...
The body has many feedback processes so that many biologic deviations from the norm are corrected before they become adverse health effects. This section of the report will focus on the physics involved in the initial portion of this chain of events.
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From page 32... ...
For the fields under consideration, this induced drift current density will be very small and is expected to be very small with respect to the diffusion current and the drift currents associated with the fields that occur naturally around cells associated with biological activity that are on the order of microamps per centimeter squared. The applied fields can also change the state or energy of the bound electrons in an atom or molecule.
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From page 33... ...
The effect of the RF fields on the biological system may take place by changing chemical reaction rates or the binding of molecules to a membrane surface. This could occur m at least five ways 03ames 1996)
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From page 34... ...
Initial results of the studies of these mechanisms indicate that to be important, the field strengths need to be sufficient so that the energy absorbed from the RF fields is a reasonable frachon of the thermal energy, kT. Other physical changes that have been suggested include changes in the diffusion constants, (Seto and Hsieh 1976)
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From page 35... ...
Another resistor and capacitor in parallel would model the fluid portion of the cell and the applied field would extend across a large number of cells in senes. At high frequencies, this would behave like a capacitive voltage divider so that the applied voltage to a given membrane would be roughly equal to the applied field divided by twice the number of cells per unit distance.
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From page 36... ...
Radio frequency magnetic field effects on chemical reaction yields.
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