Record Display for the EPA National Library Catalog


Main Title Role for the Magnetic Field in the Radiation-Induced Efflux of Calcium Ions from Brain Tissue 'In vitro'.
Author Blackman, C. F. ; Benane, S. G. ; Rabinowitz, J. R. ; House, D. E. ; Joines, W. T. ;
CORP Author Health Effects Research Lab., Research Triangle Park, NC.
Year Published 1985
Report Number EPA/600/J-85/345;
Stock Number PB86-175403
Additional Subjects Central nervous system ; Magnetic fields ; Brain ; Tissues(Biology) ; In vitro analysis ; Reprints ; Calcium ions
Library Call Number Additional Info Location Last
NTIS  PB86-175403 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 13p
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.