Browse 6,486 peer-reviewed studies on electromagnetic field health effects from 4 research libraries.
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Joines WT, Spiegel RJ · 1974
Researchers modeled the human skull as six concentric layers (skin, fat, bone, dura, cerebrospinal fluid, and brain) and calculated microwave absorption across the 0.1-3 GHz band for skull radii of 7 cm and 10 cm. The inhomogeneous model showed a broad absorption peak near 2.1 GHz with peak values of 1.52 for the 7 cm radius and 3.38 for the 10 cm radius, a peak not present in the homogeneous model.
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.
Jin H. Kinoshita · 1974
P. Czerski, M. Siekierzynski · 1974
Przemyslaw Czerski et al. · 1974
Przemysław CZERSKI · 1974
William T. Joines, Ronald J. Spiegel · 1974
Researchers modeled the human skull as six concentric layers (skin, fat, bone, dura, cerebrospinal fluid, brain) with frequency-dependent electrical properties. They calculated relative microwave absorption for models with outer radii of 7 cm and 10 cm across the 0.1–3 GHz band. A broad absorption peak near 2.1 GHz appeared in the multilayered model (1.52 for 7 cm, 1.38 for 10 cm) but not in a homogeneous model. At that peak the model predicted intense hot spots in brain tissue, with mean power densities of 8.7 mW/cc for the 10 cm model and 20.8 mW/cc for the 7 cm model.
C. C. Johnson, T. C. Rozzell · 1974
Richard A. Tell, John C. Nelson · 1974
Researchers from the Electromagnetic Radiation Analysis Branch surveyed four radar units typical of those used by commercial aircraft, two at a radar simulation laboratory and two while installed in aircraft. The study focused on the potential for exposure of individuals in the close vicinity of aircraft radar units, such as when boarding commercial air carriers, while aircraft are on the ground. The radar beams were found to rotate at approximately 15 r/min and to emanate from the aircraft above 6 feet from the ground. Radiation levels inside the cockpits did not exceed 0.2 mW/cm².
W. D. SKIDMORE, S. J. BAUM · 1974
Man M. Varma, Eric Traboulay · 1974
E. Stanton Maxey, M.D. · 1974
R. V. RAJOTTE, J. B. DOSSETOR, W. A. G. VOSS, C. R. STILLER · 1974
Canine kidneys were perfused with DMSO and fluorocarbon, cooled at 1°C/min to -40°C, then slowly cooled to -79°C for storage up to several days. Microwave thawing at 2-4°C/s produced temperature differences under 10°C when initial perfusion was complete and uniform. Microfil injection and histology revealed some preserved capillary vessels, yet no frozen-thawed kidney regained function. Kidney slices thawed by the same method showed well-preserved light microscopic structure, but PAH uptake did not survive thawing.
Todorov, N., Draganov, Y. · 1974
Multiple session chairmen and presenters including R.C. Baird et al. · 1974
Tell R A, Nelson J C · 1974
World Health Organization · 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.
S. K. Ghosh, A. M. Muc, D. H. Jagdyer, M. P. Diotte · 1974
Pensabene JW, Fiddler W, Gates RA, Fagan JC, Wasserman AE · 1974
Don Mennie · 1974
Michael E. Stamm et al. · 1974
Researchers cultured fresh tumor specimens and normal control tissues from cancer patients and measured microwave transmission at 76-86 GHz using an interferometer that subtracted normal cell spectra from tumor cell spectra. Tumor cells of the same histologic type from different patients produced similar differential spectra, while different tumor types (sarcomas, melanomas, carcinomas) showed distinct spectral responses. The height of peaks in the differential spectrum indicated the relative proportion of tumor versus normal cells in the sample, with mostly normal tumor samples yielding near-null responses. Measurements were performed blind, with histopathologic identity determined only after microwave data were reduced and correlated.
Jacqueline Segall, Robert Tjian, Janice Pero, Richard Losick · 1974
The sigma subunit of RNA polymerase from sporulating Bacillus subtilis is markedly inhibited in its ability to direct transcription of phage lambda DNA in vitro. Lambda DNA is transcribed only 9% as actively in early sporulating cells as in vegetative bacteria. Chloramphenicol treatment of sporulating cells rapidly restores sigma activity as measured in vitro. The hypothetical inhibitor is depleted exponentially with an apparent half-life of 11 min at 37°.
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.
V. V. Sevastyanov · 1974