||Role for the Magnetic Field in the Radiation-Induced Efflux of Calcium Ions from Brain Tissue 'In vitro'.
Blackman, C. F. ;
Benane, S. G. ;
Rabinowitz, J. R. ;
House, D. E. ;
Joines, W. T. ;
||Health Effects Research Lab., Research Triangle Park, NC.
Central nervous system ;
Magnetic fields ;
In vitro analysis ;
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||Two independent laboratories have demonstrated that specific frequencies of electromagnetic radiation can cause a change in the efflux of calcium ions from brain tissue in vitro. Under a static magnetic field intensity of 38 microTesla (microT) due to the earth's magnetic field, 15- and 45-Hz electromagnetic signals (40 Vp-p/m in air) have been shown to induce a change in the efflux of calcium ions from the exposed tissues, while 1- and 30-Hz signals do not. The authors now show that the effective 15-Hz signal can be rendered ineffective when the net static magnetic field is reduced to 19 microT with Helmholtz coils. In addition, the ineffective 30-Hz signal becomes effective when the static magnetic field is changed to + or - 25.3 microT or to + or - 76 microT. These results demonstrate that the net intensity of the static magnetic field is an important variable. The results appear to describe a resonance-like relationship in which the extremely-low-frequency electromagnetic field that can induce a change in efflux is proportional to a product of the net magnetic field intensity and an index, 2n+1, where n=0,1.
||Pub. in Bioelectromagnetics 6, n4 p327-337 Dec 85.
|NTIS Title Notes
||Reprint: Role for the Magnetic Field in the Radiation-Induced Efflux of Calcium Ions from Brain Tissue 'In vitro'.
|PUB Date Free Form
||PC A02/MF A01