EMF Research Studies

New cavity perturbation technique for microwave measurement of dielectric constant

Susanta Sen, P. K. Saha, B. R. Nag · 1979

RADIOFREQUENCY ENVIRONMENTS IN THE UNITED STATES

David E. Janes, Jr. · 1979

Temperature Distributions obtained with Diathermy Electrodes implanted into a Phantom

H. J. WASSERMAN, W. LEVIN · 1979

The treatment volume was sandwiched between two sets of electrodes forming parallel planes 2.5 cm to 10 cm apart with 1 cm spacing between adjacent electrodes. Heating at a rate of not more than 4.5°C in approximately 20 minutes produced temperature uniformity within 1°C across cylindrical volumes 2.5 to 10 cm wide. Slower heating avoided excessive temperatures near the electrodes, and thermal conduction in the phantom helped maintain uniform distributions. The method was considered a possible means of achieving localized hyperthermia in vivo for cancer treatment.

The Role of Water in Microwave Absorption by Biological Material with Particular Reference to Microwave Hazards

A. W. J. DAWKINS et al. · 1979

Researchers modeled a hydrated macromolecule as a spherical core with a bound water shell and calculated microwave power absorption from 100 MHz to 100 GHz. Bound water absorbed at least five times more energy per unit volume than free water, with peak difference at the bound water relaxation frequency. Because bound water is strongly coupled to macromolecules, this enhanced absorption could be a significant factor in explaining biological effects of microwaves at a molecular level.

What are the effects of electrical and magnetic fields on man?

Jean Cabanes · 1979

EFFECTS OF ULTRASOUND ON DROSOPHILA: III. EXPOSURE OF LARVAE TO LOW-TEMPORAL-AVERAGE-INTENSITY, PULSED IRRADIATION

Sally Z. Child, Edwin L. Carstensen, Shung K. Lam · 1979

Dielectric Properties of Brain Tissue between 0·01 and 10 GHz

KENNETH R. FOSTER et al. · 1979

Between 0-01 and ~1 GHz the permittivity decreased and conductivity increased as a power law of frequency. Above 1 GHz the conductivity increased quadratically with frequency due to dipolar reorientation of free water molecules, with an apparent rotational relaxation frequency of 21-24 GHz at 37 °C. The authors provided empirical equations for the dielectric properties of average brain tissue at 37 °C for theoretical microwave absorption studies.

Microwave scattering parameter imagery of an isolated canine kidney

Lawrence E. Larsen, John H. Jacobi · 1979

An Investigation of Energy Densities in the Vicinity of Vehicles with Mobile Communications Equipment and Near a Hand-held Walkie Talkie

Donald L. Lambdin · 1979

Occupational health and radiation hazards

Sol M. Michaelson · 1979

Researchers at the State University at Buffalo irradiated rats with single doses ranging from .05 to 1.5 roentgen and measured red cell precursor production. Doses of .15 roentgen and above caused a sudden increase in precursor numbers but at a lower rate than in nonirradiated rats. The marrow's ability to produce normal precursor numbers had not recovered at 5, 13, or 30 weeks after exposure.

Evaluation: Shortwave Diathermy Units

Robert Mosenkis · 1979

Diathermy applies high-frequency electromagnetic energy to generate heat in body tissues. Surgical diathermy destroys tissues, while therapeutic diathermy warms them without damage. The effectiveness of therapeutic diathermy has been widely debated, and claims for it are often exaggerated or poorly supported by reliable clinical data.

Inhibition of tumor growth by radiofrequency therapy

Kenji TAZAWA et al. · 1979

INTERACTION OF 2.45 GHZ MICROWAVE RADIATION WITH EMBRYONIC QUAIL HEARTS

M.J. Galvin, M. Lieberman and D.L. McKee · 1979

Researchers exposed Japanese quail embryos to 2.45 GHz microwaves at 5 mW/cm2 or 20 mW/cm2 for the first 8 days of development. Neither exposure level caused changes in embryonic heart morphology or myocardial ultrastructure. Lactate dehydrogenase and glutamic-oxaloacetic transaminase activities did not differ from controls. Creatine phosphokinase activity was lower at 20 mW/cm2 compared to control, but unchanged at 5 mW/cm2.

Electromagnetic Interference (EMI) Radiative Measurements for Automotive Applications

J. W. Adams, H. E. Taggart, M. Kanda, J. Shafer · 1979

Microwaves: Effect on Thermoregulatory Behavior in Rats

James P. Dilger et al. · 1979

MEASURED INTERNAL ELECTRIC FIELD IN PHANTOM HUMAN HEADS EXPOSED TO LEAKAGE RADIATION FROM MICROWAVE OVENS

Henry S. Ho, William P. Edwards, Howard Bassen · 1979

Researchers measured internal electric field distributions in phantom human heads exposed to leakage radiation from 2450 MHz and 915 MHz microwave ovens. The phantom heads were made from actual adult and child skulls filled with dielectric materials matching the electrical properties of muscle or brain. For 5 mW/cm² leakage at 2450 MHz, the maximum equivalent dose rate was 9.6 W/kg in the adult phantom and 14.6 W/kg in the child phantom. For 5 mW/cm² leakage at 915 MHz, the maximum equivalent dose rate was 3.0 W/kg in the adult phantom and 5.3 W/kg in the child phantom.

Hvem er den næste (der får kræft)?

Richard M. Stern · 1979

PROTECTING MILITARY PERSONNEL AND THE PUBLIC FROM THE HAZARDS OF ELECTROMAGNETIC RADIATION FROM MILITARY COMMUNICATIONS AND RADAR SYSTEMS

Stephen A. Oliva · 1979

The thesis aimed to improve protection for military personnel and the public from electromagnetic radiation hazards of military communications and radar systems across the 30 Hz to 300 Giga-hertz spectrum. The thesis detailed military involvement with EMR-emitting systems including submarine communications, radar, microwave food processing, and extremely low frequency communications. A comparison of protective measures across services identified areas where some services were not using measures employed by others.

RADIATION SURVEYS—MEASUREMENT OF LEAKAGE EMISSIONS AND POTENTIAL EXPOSURE FIELDS

David E. Janes, Jr. · 1979

BASIS FOR THE NIOSH RADIOFREQUENCY AND MICROWAVE RADIATION CRITERIA DOCUMENT

Zorach (Zory) R. Glaser, Ph.D. · 1979

ULTRA-FAST RF POWER METER Model 1045

Pacific Measurements Inc. · 1979

EFFECT OF D.C. MAGNETIC FIELDS ON Ca2+ TRANSPORT IN ISOLATED MUSCLE MICROSOMES

A. Ripamonti, R.B. Frankel, E.M. Ettienne · 1979

Researchers isolated sarcoplasmic reticulum vesicles from 10-14 day old chicks and exposed the microsomes to a 0.7 tesla magnetic field at 4°C for up to 60 minutes before adding them to a reaction mixture. After 30 minutes of exposure, calcium uptake rates rose from 800 to 6000 nanomoles per milligram per minute and total calcium sequestered rose from 175 to 350 nanomoles per milligram. Phosphate release from ATP hydrolysis fell from 6.0 to 3.5 nanomoles per milligram per minute over the same period.

Absence of Ocular Pathology after Repeated Exposure of Unanesthetized Monkeys to 9.3-GHz Microwaves

R.D. McAfee et al. · 1979

Researchers trained unfettered Macaca mulatta monkeys to hold their heads in a pulsed microwave beam at 9.31 GHz and 150 mW/cm?. Twelve monkeys were irradiated individually without restraint or anesthesia during 30 to 40 sessions and then observed for one year.

THE GROWTH MODULATING EFFECTS OF NON-THERMAL, NON-IONIZING RADIATION (RADIOWAVES, PULSED MAGNETIC RADIATION) ON NEUROBLASTOMA DIFFERENTIATION, TUMOR GROWTH AND EMBRYONIC MOUSE PALATAL DEVELOPMENT

William Regelson et al. · 1979

DIAGNOSTIC AND SURGICAL EYE INSTRUMENTS

Medical Instrument Research Associates, Inc. · 1979