Browse 6,486 peer-reviewed studies on electromagnetic field health effects from 4 research libraries.
Showing 1,319 studies (Rodent Studies)
William B. Stavinoha et al. · 1975
The second study used 40-minute daily exposures for 5 days at 19 MHz with an H-field of 55 amps/meter and an E-field of 8000 volts/meter. Growth was tracked daily for 21 days and then weekly for 16 weeks, and no statistically significant differences were found between exposed and control groups.
Richard D. Phillips et al. · 1975
G. N. Catravas · 1975
Gabriel G. Nahas et al. · 1975
Roberts Rugh, Edward I. Ginns, Henry S. Ho, William M. Leach · 1975
Researchers exposed individual CF1 mice to 2450 MHz microwave radiation in a waveguide with controlled temperature, humidity, and air flow. Female mice in estrus had a lower average lethal absorbed dose (10.65 cal/g) than those in diestrus (11.50 cal/g). Pregnant mice exposed on gestation day 8 showed teratogenic effects including exencephalies, hemorrhages, resorptions, stunting, and fetal death at absorbed doses of 3 to 8 cal/g, and the response was not all-or-none. As absorbed dose increased, the probability of at least one exencephaly per litter increased, but the relationship was not linear and varied widely among litters. A total of 1096 mice were exposed and monitored individually.
James H. Merritt, James W. Frazer · 1975
Mice were exposed to 19 MHz radiofrequency radiation and then euthanized by microwave-heating brain inactivation. There were no significant differences in any neurotransmitters or metabolites when microwave controls were compared to either the E-field or H-field groups. Microwave controls had significantly higher brain content of 5-hydroxyindole acetic acid, serotonin, norepinephrine, and dopamine than conventional controls.
A.S. HYDE, J.J. FRIEDMAN · 1975
Allan H. Frey, Sondra R. Feld · 1975
Dietzel F. · 1975
A. P. Krueger, E. J. Reed · 1975
Researchers exposed young mice to simulated ELF electromagnetic fields at 45 Hz and 75 Hz at 100 V/m and measured growth rate, serotonin metabolism, and susceptibility to influenza virus. No significant difference in growth rate was found between exposed and control mice across experiments lasting 12 to 26 days. Four separate influenza challenge tests at 75 Hz and 100 V/m found no evidence of altered resistance using cumulative mortality rates and LD50 titers.
Akihiko Irimajiri, Tetsuya Hanai, Akira Inouye · 1975
O. P. Gandhi · 1975
Experiments using a parallel plate waveguide measured RF absorption in rats and biological-phantom prolate spheroids across frequencies and polarizations. The results correlated well with free-space irradiation findings. Peak absorption occurred when the electric field was parallel to the long body axis at frequencies where the body length was about one-quarter wavelength, with absorption 2.5 to 3.5 times the shadow cross-section.
NANCY W. KING et al. · 1974
The apparatus is a 6 m long, temperature-controlled water alley with automatically raised and lowered end platforms that record swim speed on each traverse. Water temperature was held at 24°C with a gradient not exceeding .3°C across the alley. An avoidance-conditioning and dunking procedure trained more than 90% of rats to swim reliably at 23°C. The platform rest period used in most experiments was 30 seconds. The automated system operated reliably for extended sessions with trained rats.
V. M. Koldaev · 1974
Researchers exposed albino mice to acute microwave radiation at 62±5 milliwatt/cm² for 11 minutes and to chronic radiation at the same intensity for 20 days at 6 minutes daily. Survival increased one and a half fold with cordiamine treatment. No positive effect of ephedrine was revealed.
W. D. SKIDMORE, S. J. BAUM · 1974
Man M. Varma, Eric Traboulay · 1974
O. P. Gandhi · 1974
At resonance, absorption was an order of magnitude greater for vertical polarization (electric field along the long axis) than for horizontal or longitudinal orientations. For a human-like aspect ratio of 5.795, temperature increase was 10 times greater for vertical than for horizontal exposure. Extrapolation yielded maximum absorption frequencies for humans of 40–55 MHz for vertical orientation and 135–165 MHz for the other two orientations. Below resonance, prolate spheroids absorbed considerably more in vertical than horizontal orientation, with longitudinal absorption only slightly higher than horizontal.
John Schrot, T. Daryl Hawkins · 1974
At each exposure duration, mortality increased with higher incident energy density, and the energy density required to kill 50% of rats rose from 1.18 to 1.67 W-min/cm² as duration increased from 30 to 240 seconds. The corresponding lethal power density fell from 2.36 to 0.42 W/cm², an 85% decrease across the duration range. Heavier rats weighing 195 to 210 g were more vulnerable than lighter rats weighing 180 to 194 g.
S. Lang · 1974
Researchers measured electrostatic charges from mice and rats and found an average field strength of 200 V/m. Total population activity depended on animal density in cages, explained by thigmotaxis. Higher density increased touch frequency and rubbing, raising field strength until animals reduced activity to match a nominal value.
OSTROVSKAIA IS, IASHINA LN, EVTUSHENKO GI · 1974
DAVID McK. RIOCH, M.D. · 1974
R. V. RAJOTTE et al. · 1974
Freeman W. Cope · 1974
The author first built a large copper cavity that absorbed over 95 percent of incident S-band power when empty, making it impractical for rat exposures. Incident powers up to 10 watts were used at 3.25 Gc for S-band and 9.00 Gc for X-band.
Gandhi OP · 1974
Researchers used a parallel-plate waveguide to measure RF absorption in rats and phantom bodies across 285 to 4000 MHz. The waveguide results agreed well with free-space irradiation measurements. The El4 orientation (electric field along the major length) was the most absorbing, while the A14 orientation was the least absorbing, and the k14 orientation was only slightly more absorbing than A14. In rats, peak absorption frequencies decreased with increasing body weight, with maximum absorption at 1217, 1020, 900, and 760 MHz for 96-, 158-, 261-, and 390-g animals respectively. Waveguide absorption measurements were in quantitative agreement with behavioral experiments showing shorter work-stoppage times at frequencies with higher absorption.
P. Polson, D.C.L. Jones, A. Karp, J. S. Krebs · 1974