Unknown authors · 1973
This 1973 technical report examined different types of RF power meters designed for use with ultrasonic medical equipment. The research focused on measurement devices including Hall effect sensors and couplers that could accurately monitor radiofrequency power levels during ultrasonic procedures. This work addressed the need for precise power measurement in early medical ultrasound technology.
N.E. Anden et al. · 1973
This 1973 study examined goldfish nerve cells and found that when a single Mauthner cell fires an electrical impulse, it creates a powerful electrical field that blocks nerve activity in surrounding cells up to 200 micrometers from its soma. The electrical current from one nerve cell was strong enough to prevent other nearby nerve cells from firing, demonstrating how electrical fields can directly interfere with normal nervous system function.
BIGU DEL BLANCO, J. · 1973
This 1973 technical report examined radiofrequency fields as an emerging ecological factor in our environment. The research appears to have reviewed the environmental effects of RF radiation, representing early scientific recognition that electromagnetic fields could impact biological systems. This work came at a time when RF technology was expanding but environmental health effects were just beginning to be understood.
J. B. Block, C. G. Zubrod · 1973
This 1973 review by Block examined how temperature changes (both heating and cooling) could be used alongside traditional cancer treatments to improve outcomes. The research explored hyperthermia (heating) and hypothermia (cooling) as adjuvant therapies, investigating how temperature affects tumor regression and cell cycle processes in cancer treatment.
Dietrich E. Beischer, James D. Grissett, Robert E. Mitchell · 1973
This 1973 technical report examined human exposure to extremely low frequency (ELF) magnetic fields, focusing on the biological effects of these alternating magnetic fields on people. The research represents early scientific investigation into how ELF magnetic fields interact with human biology. This work helped establish the foundation for understanding potential health effects from power line frequencies and electrical infrastructure.
A. ZERVINS, D.V.M. · 1973
Researchers exposed 62 chick eggs to a 26-kHz electromagnetic field for 19 days to study effects on embryo development. Exposed eggs had a higher hatching rate (64.5%) than the 70 unexposed controls (48.5%), and the hypothesis that exposed embryos have less chance of hatching was rejected at the 5% significance level. The study found no conclusive evidence that this specific EMF frequency disrupts chick embryo development.
W.D. Rowe, D.E. Janes, R.A. Tell · 1973
This 1973 conference paper by WD Rowe assessed potential health risks from telecommunications technology, examining electromagnetic radiation exposure from various communication systems. The research represents early scientific efforts to evaluate health effects of telecommunications infrastructure during the technology's rapid expansion. This work helped establish the foundation for modern EMF health risk assessment protocols.
Unknown authors · 1973
This 1973 FDA government report examined radiological health issues from electronic products, covering both electromagnetic and ionizing radiation sources. The document represents early federal efforts to understand and regulate radiation exposure from consumer electronics during a period of rapid technological growth.
Stan Yalof, Don Brisbin · 1973
This 1973 research examined the dielectric probe as a measurement tool for studying how materials interact with electromagnetic fields. The study focused on the technical applications of dielectric probes for research and industrial process control. While primarily technical in nature, this work contributed to foundational methods for measuring electromagnetic field interactions with various materials.
Jose Daels, MD · 1973
This 1973 study by Jose Daels, MD, examined microwave heating of the uterine wall during parturition in 1000 patients without obstetric pathology, using the Radarmed 12 S 230 with a curved wide-field radiation electrode. Of the 1000 patients, 962 described the analgesic effect as good and 38 reported moderate attenuation. Compared with 1000 similar controls, the average duration of the dilation stage was significantly shortened, by 108 minutes for primiparas and 43 minutes for multiparas, with no undesirable side effects and nil perinatal mortality and morbidity.
Robert M. Lebovitz · 1973
This 1973 study examined how low-level microwave radiation might affect the inner ear's balance system (vestibular apparatus). The researcher found that microwave exposure at 15-20 mW/cm² could create tiny temperature changes in the inner ear fluid, potentially causing detectable effects on balance and spatial orientation.
ROTA, P. · 1973
This 1973 technical report examined immediate and delayed changes in the morphological elements of blood in mice exposed acutely to radiant heat of varying intensity, as a possible emergency condition in the course of aviation and space flights. Red blood cell changes were evident only after severe thermal exposure, while platelet counts decreased in all exposed groups.
PIRO KRAMAR, ASHLEY F. EMERY, ARTHUR W. GUY, JAMES C. LIN · 1973
This 1973 study exposed rabbit eyes to 2450 MHz microwave radiation (the same frequency used in microwave ovens) to determine what power levels cause cataracts. Researchers found good agreement between their theoretical calculations and experimental results in establishing the threshold levels that trigger cataract formation.
Dr Albert Krueger · 1973
Dr. Albert Krueger's 1973 research examined how air ion concentrations affect human health and comfort. The study found that ion-depleted indoor air may cause anxiety, discomfort, reduced efficiency, and increased respiratory infection risk. Positive ion excess was linked to the ill effects of notorious winds like the Sharav and Föhn.
D. D. Eley, R. J. Mayer, R. Pethig · 1973
Scientists exposed beef heart mitochondria (the cell's energy factories) to microwave radiation at 9.2 GHz and measured how electrons moved through them. They found that prolonged microwave exposure irreversibly damaged the mitochondria's ability to produce energy, specifically destroying cytochrome oxidase, a critical enzyme in cellular respiration.
G. Fischer · 1973
Researchers in 1973 studied how artificial electrostatic fields affect animal physiology and found that positively charged constant fields increased liver activity, oxygen consumption, and immune system readiness. When animals were shielded from these fields in Faraday cages, the opposite effects occurred. The study suggests that natural atmospheric electrical fields may play an important role in maintaining health and metabolism.
Robert D. Mc Afee, Rene Braus, Jr., Joseph Fleming, Jr. · 1973
This 1973 study tested whether 2450 MHz microwave radiation (the same frequency used in microwave ovens) could stimulate growth in mice. Researchers found no growth-stimulating effects from chronic exposure to this frequency. The study specifically refuted earlier claims that low-power microwave radiation could enhance biological growth.
McRee · 1973
This 1972 study examined how a 2450 MHz continuous wave microwave field interacts with temperature measurement devices like thermocouples and thermistors, with and without copper braided shielding on the leads. At 100 mW/cm², shielded and unshielded thermistors provided valid measurements with no detectable interaction, while unshielded thermocouples were totally unsatisfactory as detectors and shielding of the leads eliminated most of their problems.
James L. Lords et al. · 1973
Researchers exposed isolated hearts from cold-blooded animals to 960 MHz microwave radiation and found it caused the hearts to beat slower (bradycardia), which is the opposite of what normally happens when hearts are heated. This unexpected effect only occurred at very specific power levels around 3 milliwatts absorbed by the heart tissue.
Unknown authors · 1973
This 1973 quarterly research report examined clinical aspects of microwave exposure in laboratory animals, particularly dogs, focusing on temperature response and biological effects. The study represents early systematic research into microwave radiation's impact on living organisms. As part of ongoing research, this work helped establish foundational understanding of how microwave energy affects biological systems.
Stuart O. Nelson · 1973
This 1973 review examined the electrical properties of agricultural products, analyzing how crops and plant materials respond to electrical fields. While focused on agricultural applications, this foundational research helped establish the scientific basis for understanding how biological materials interact with electromagnetic energy.
P. E. Hamrick, B. T. Butler · 1973
Researchers exposed bacteria (E. coli and Pseudomonas) to 2450 MHz microwave radiation at 60 mW/cm² for 12 hours to study effects on growth. They found no impact on bacterial reproduction rates beyond what could be explained by temperature changes. This suggests microwave radiation at this frequency may not directly disrupt cellular processes in these microorganisms.
L. V. Polyashchuk · 1973
Soviet researchers in 1973 exposed rabbits to microwave radiation at various power levels and durations, finding that the radiation increased permeability of protective barriers in the brain and other tissues. This early study documented how microwave exposure can compromise the blood-brain barrier, which normally protects the brain from harmful substances in the bloodstream.
Tadeusz E. Wroblewski et al. · 1973
Researchers studied hospital patients who worked with microwave radiation and found that 14% developed duodenal ulcers, compared to normal population rates. The workers were exposed to microwave radiation levels of 10-100 mW/cm² through their jobs. The authors concluded that prolonged workplace microwave exposure may contribute to developing stomach ulcers.
P. L. Rustan, W. D. Hurt, J. C. Mitchell · 1973
Researchers tested microwave oven radiation on cardiac pacemakers implanted in dogs and found interference occurred at extremely low power levels - less than 10 microwatts per square centimeter. Some pacemakers experienced dangerous rhythm changes including slow heartbeat, fast heartbeat, or complete shutdown when exposed to the same 2,450 MHz frequency used in commercial microwave ovens.
