Browse 6,486 peer-reviewed studies on electromagnetic field health effects from 4 research libraries.
Showing 1,087 studies from Glaser RF/Microwave Archive with extracted diagrams
Duc Dung NGUYEN et al. · 1980
This 1980 technical study examined how to design and use microwave probes for medical thermography - a technique that uses microwave radiation to measure internal body temperature for diagnosis and treatment. The researchers developed mathematical models to improve probe design and interpret thermal patterns from microwave measurements.
Michèle ROBILLARD et al. · 1980
This 1980 French technical study examined how rectangular waveguide probes filled with dielectric materials penetrate living tissue for medical microwave applications like thermography and hyperthermia treatment. Researchers found that probe performance depends on both the electrical properties of human tissue and the specific design characteristics of the probes themselves. The work established criteria for optimizing probe design in biomedical microwave systems.
M. Gautherie et al. · 1980
Researchers used 9 GHz microwave radiometry to study breast cancer patients and other tumor patients, comparing this technique to infrared thermography. The study found that microwave radiometry could detect thermal conditions in deeper tumor tissues where infrared thermography failed, providing valuable information about tumor metabolism and blood flow patterns.
H.F. Huang, R.A. Yates · 1980
This 1980 study describes using radio-frequency energy combined with hot air to dry fungal material, creating a textured food product. The research focused on food processing applications, not health effects. The dried fungal material could be rehydrated to more than twice its original dry weight.
BLAKE S. WILSON et al. · 1980
Researchers exposed rats to microwave radiation and used radioactive glucose to map brain activity patterns. They discovered that continuous-wave microwaves triggered auditory responses in the brain at power levels as low as 2.5 mW/cm², even though these microwaves don't create audible sounds. The study proved these responses originated in the inner ear (cochlea), not from direct brain stimulation.
M.A. Stuchly, M.H. Repacholi, D. Lecuyer, R. Mann · 1980
Canadian researchers surveyed 82 industrial RF heating devices used for plastic sealing and wood gluing in 1979, operating at 4-51 MHz with power outputs up to 90 kW. Many devices exposed workers to RF fields exceeding 1 mW/cm², with some over 10 mW/cm² - levels far above what's considered safe today. This study documented significant occupational RF exposure in industrial settings decades before modern wireless technology.
Howard Bassen · 1980
This 1980 FDA document outlines the agency's measurement and risk assessment activities designed to control radiofrequency and microwave radiation exposures. The paper describes the regulatory framework the FDA developed to monitor and limit RF/microwave radiation from various sources. This represents an early government acknowledgment of the need to actively manage EMF exposures for public health protection.
S. Washisu, I. Fukai · 1980
Researchers developed a simple method using toner particles to visualize electric field patterns inside microwave ovens during operation. The toner forms visible patterns on heated plates that directly correspond to the electromagnetic field distribution, providing better resolution than previous methods using thermopaint. This technique allows engineers to see exactly where microwave energy concentrates inside the oven cavity.
Howard I. Bassen · 1980
This 1980 FDA evaluation examined microwave radiation emissions from Sensormatic electronic security systems, the anti-theft devices commonly found at store entrances. The study assessed whether these systems posed radiation hazards to the public. This represents early government recognition that everyday electronic security devices could be sources of microwave exposure requiring evaluation.
R. B. Olcerst et al. · 1980
Researchers exposed rabbit red blood cells to 2.45 GHz microwave radiation (the same frequency used in microwave ovens) and found that it increased the leakage of sodium and rubidium ions from the cells at specific temperatures. The effect occurred at much lower power levels than would be needed to heat the cells, suggesting a non-thermal mechanism.
André CASTELAIN et al. · 1980
French researchers developed and tested miniature coaxial probes designed to measure the electrical properties of biological tissues when exposed to radiofrequency radiation. The study focused on creating accurate measurement tools for understanding how RF energy interacts with living tissue, particularly for medical applications like hyperthermia treatment.
D.D. Nguyen et al. · 1980
This 1980 study examined how microwave probes (2-10 GHz frequency range) interact with human tissue for medical thermal imaging applications. Researchers developed mathematical models to understand how microwaves penetrate tissue and detect temperature patterns, particularly for tumor detection. The work laid groundwork for understanding microwave-tissue interactions in medical diagnostics.
Guy, Arthur W., Wallace, Jack, McDougall, John A. · 1979
This 1979 study by Guy and colleagues developed a specialized waveguide system for exposing mice to 918 MHz and 2450 MHz microwave radiation in controlled laboratory conditions. The researchers designed equipment that could precisely deliver circularly polarized electromagnetic fields to groups of four mice at a time, with different positioning strategies for optimal exposure at each frequency. This work established technical methods for studying how microwave radiation affects biological systems like blood-brain barrier function and whole-body heating effects.
Susanta Sen, P. K. Saha, B. R. Nag · 1979
Researchers developed a new method for measuring how materials interact with microwave radiation using a modified cylindrical cavity. The technique simplifies measurements by eliminating the need for sample size calculations and system calibration. While limited to materials with low dielectric properties, it offers improved accuracy for microwave testing applications.
David E. Janes, Jr. · 1979
The EPA conducted the first comprehensive survey of radiofrequency radiation levels across 15 major U.S. cities from 1975-1979, measuring emissions from 0.5-900 MHz in everyday environments. The study documented baseline RF exposure levels from broadcast antennas, radars, medical equipment, and industrial sources to establish whether environmental guidelines were needed. This landmark research provided the foundation for understanding how much RF radiation Americans were encountering in their daily lives.
H. J. WASSERMAN, W. LEVIN · 1979
Researchers tested shortwave diathermy electrodes implanted in a tissue phantom to create uniform heating patterns. They found that specific electrode configurations could produce controlled, localized heating suitable for cancer treatment. This 1979 study helped establish techniques for using radiofrequency energy in medical hyperthermia therapy.
A. W. J. DAWKINS et al. · 1979
This 1979 study examined how water molecules bound to biological structures absorb microwave energy differently than free water. Researchers found that bound water absorbs up to five times more microwave energy than free water, particularly around 1 GHz frequencies. This discovery helps explain why microwaves can have biological effects at the molecular level.
KENNETH R. FOSTER et al. · 1979
Researchers measured how dog brain tissue responds to microwave frequencies from 0.01 to 10 GHz, finding that grey and white matter have different electrical properties that change predictably with frequency. The study revealed that brain tissue contains about 70% water in grey matter and 55% in white matter, with some water not contributing to electrical responses above 1 GHz.
Lawrence E. Larsen, John H. Jacobi · 1979
Researchers developed a microwave imaging system using 3.9 GHz radiation to create detailed pictures of a dog kidney's internal structure. The technology successfully distinguished between different kidney regions including the cortex, medulla, and collecting system. This early study explored using microwave radiation as a medical imaging tool.
Sol M. Michaelson · 1979
This 1979 research examined radiation hazards across the electromagnetic spectrum in workplace settings, focusing on occupational health risks from microwave, laser, and optical radiation sources. The study addressed the growing need to understand and protect workers from various forms of electromagnetic radiation exposure in industrial and technical environments.
Robert Mosenkis · 1979
This 1979 evaluation examined diathermy units, which use high-frequency electromagnetic energy to generate heat in body tissues for medical treatment. The analysis found that therapeutic diathermy's effectiveness has been widely debated, with treatment doses poorly controlled and claims often exaggerated or unsupported by reliable clinical data.
James P. Dilger et al. · 1979
Researchers exposed rats to 2450 MHz microwave radiation (the same frequency used in microwave ovens) and found the animals changed their heat-seeking behavior even when their core body temperature didn't change. The rats pressed a lever less frequently to turn on a warming lamp when exposed to microwaves, suggesting they were detecting internal heating that standard temperature measurements couldn't detect.
David E. Janes, Jr. · 1979
This 1979 technical study by Janes examined radiation leakage from electronic equipment and measured the electromagnetic fields people might be exposed to. The research focused on surveying actual emission levels from various radiofrequency sources to understand potential human exposure scenarios. This type of foundational measurement work helped establish early understanding of EMF exposure levels in real-world environments.
Pacific Measurements Inc. · 1979
This 1979 technical report describes the Model 1045 ultra-fast RF power meter, a specialized instrument for measuring radiofrequency and microwave power levels. The device was designed for automatic testing applications, featuring detector and multiplexer components to measure power across various frequency ranges. While this is technical documentation rather than health research, such instruments are essential for measuring EMF exposures that scientists later study for biological effects.
A. Ripamonti, R.B. Frankel, E.M. Ettienne · 1979
Researchers exposed muscle tissue from chicks to a 0.7 tesla magnetic field for up to 60 minutes, then measured calcium transport in cellular structures. They found that longer magnetic field exposure increased both the rate and total amount of calcium uptake by the muscle cells. This suggests magnetic fields can alter fundamental cellular processes that control muscle contraction.