EMF Research Studies

Radiations and Cell Division

Arthur C. Giese · 1947

L'Induzione magneto-elettrica in biologia

Pirovano, A. · 1934

MICROWAVE EFFECTS ON HUMAN COLONY FORMING MARROW CELLS

Unknown authors

Researchers exposed marrow cells from three leukemia patients in remission to 2450 MHz continuous-wave microwaves at four power levels for 15 minutes. Sham exposures used the same chamber without microwave power. Colony formation was significantly reduced at 500 and 1000 mW/cm2 but not at lower power levels.

EFFECTS OF MICROWAVE RADIATION ON CULTIVATED RAT KANGAROO CELLS

Kenneth T. S. Yao, Mayme M. Jiles

Researchers grew cells derived from the bone marrow and retinal choroid of the rat kangaroo (Rotrurus tridactylus) and exposed them to 2450 MHz microwave radiation for 5 to 20 minutes at distances of 10, 25, or 50 cm. Short exposure times at the longer distances resulted in cell growth greater than that of unirradiated controls. Longer exposure times at shorter distances impaired cell proliferation. Chromosome damage appeared in cells exposed at 10 cm for at least 10 minutes, and the percentage of damaged cells increased with longer exposure. When cells were sensitized with 5-bromodeoxyuridine, chromosome damage tripled.

THE MUTAGENIC EFFECT OF MODULATED MICROWAVE RADIATION EXPOSURE TO SALMONELLA TYPHIMURIUM

Unknown authors

Researchers exposed Salmonella typhimurium to 2.45 GHz amplitude-modulated microwave radiation at an average specific absorption rate of approximately 2.5 mW/g in a waveguide inside a 37°C incubator. Stationary-phase and log-phase bacteria were exposed for three hours, and stationary-phase bacteria were also exposed for 24 hours. No effect on viability or mutation frequency was seen after three-hour exposure, but one of five strains exposed for 24 hours showed reduced viability and increased mutation frequency compared with a 37°C control, though not compared with a 39°C control. Reconstruction experiments found the vial temperature inside the waveguide was about 1.5°C higher than the incubator temperature, which could explain the observed changes.

STUDIES OF MUTAGENIC EFFECTS OF MAGNETIC FIELDS IN BACTERIA

Unknown authors

Researchers conducted preliminary testing of magnetic field mutagenicity using bacterial systems with field strengths ranging from 0.1 to 1.1 Tesla. Salmonella strain TA98, which mutates by frameshift, did not show an increase in mutation frequency. Initial tests with E. coli, B. subtilis, and Photobacterium fisheri also produced suggestive data of increased mutation frequencies.