EMF Research Studies

Health Surveillance of Personnel Occupationally Exposed to Microwaves. I. Theoretical Considerations and Practical Aspects

Przemyslaw Czerski et al. · 1974

Resonance Absorption of Microwaves by the Human Skull

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.

Liquid-Crystal Fiberoptic RF Probes - Part 1 - Temperature Probe for M/W Fields

C. C. Johnson, T. C. Rozzell · 1974

Microwave Hazard Measurements Near Various Aircraft Radars

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.

BIOLOGICAL EFFECTS IN RODENTS EXPOSED TO 10⁸ PULSES OF ELECTROMAGNETIC RADIATION

W. D. SKIDMORE, S. J. BAUM · 1974

DEATH BY BIOENTRAINMENT?

E. Stanton Maxey, M.D. · 1974

PRESERVATION STUDIES ON CANINE KIDNEYS RECOVERED FROM THE DEEP FROZEN STATE BY MICROWAVE THAWING

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.

Effect of a pulsed ultrahigh-frequency electromagnetic field on the cholesterol content in the serum in rabbits

Todorov, N., Draganov, Y. · 1974

DOSIMETRY OF ELECTROMAGNETIC RADIATION

Multiple session chairmen and presenters including R.C. Baird et al. · 1974

Microwave hazard measurement near various aircraft radars

Tell R A, Nelson J C · 1974

A survey of activities concerning various kinds of non-ionizing radiation in different countries

World Health Organization · 1974

A METHOD OF MEASURING RF ABSORPTION OF WHOLE ANIMALS AND BODIES OF PROLATE SPHEROIDAL SHAPES

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.

A Proposal for a Microwave Radiation Warning Sign

S. K. Ghosh, A. M. Muc, D. H. Jagdyer, M. P. Diotte · 1974

Effect of frying and other cooking conditions on nitrosopyrrolidine formation in bacon

Pensabene JW, Fiddler W, Gates RA, Fagan JC, Wasserman AE · 1974

Have instrument, will travel

Don Mennie · 1974

Microwave Characteristics of Human Tumor Cells

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.

Chloramphenicol Restores Sigma Factor Activity to Sporulating Bacillus subtilis

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°.

Lethal Effects of 3000 MHz Radiation on the Rat

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.

A RAPID METHOD OF VISUALIZING THE STRUCTURE OF AN EXTREMELY HIGH-FREQUENCY FIELD

V. V. Sevastyanov · 1974

BIOLOGICAL EFFECTS OF RADIOFREQUENCY ELECTROMAGNETIC FIELDS

Z. V. Gordon, Editor · 1974

Consumer protection with teeth

Mennie · 1974

Regulation of Animal Population Activity by Electrostatic Charges Surrounding the Body Surfaces

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.

Use of radiation-sensitive bacterial mutants in the detection of deleterious effects of environmental agents

Mattern IE, Roberti B · 1974

Researchers used radiation-sensitive mutants of Uscherichin coli and Salmonella tuphimurcun in the study. The mutants were employed to identify environmental pollutants that damaze DN. Liver homogenates were added to the test system to imitate in vivo metabolism. The study also investigated the effects of 3 iHl% microwaves on hrologic Vival and mutation taduction.

Empirical Studies of Cardiac Pacemaker Interference

Mitchell JC, Hurt WD, Walters WH · 1974

RISCHI E DANNI DERIVANTI DA ESPOSIZIONE PROFESSIONALE A CAMPI ELETTROMAGNETICI

G. MOLTENI · 1974