G. Kantor, D. M. Witters, J. W. Greiser · 1977
This 1977 engineering study describes the design of a specialized microwave applicator for medical diathermy treatments. The device was engineered to produce circularly polarized electromagnetic fields for more uniform tissue heating while minimizing radiation leakage. This represents early research into controlling microwave energy delivery for therapeutic purposes.
James H. Botsford · 1977
This 1977 conference paper compared two methods for measuring heat stress: the BOTSBALL thermometer and the WBGT (Wet Bulb Globe Temperature) index. The research examined how well these different measurement techniques assess physiological stress from heat exposure. This type of environmental measurement research provides important context for understanding how various stressors, including electromagnetic fields, affect human physiology.
M. O'Donnell, J. W. Mimbs, B. E. Sobel, J. G. Miller · 1977
Researchers measured how ultrasound waves pass through heart muscle tissue at different temperatures and time periods after removal from animals. They found that ultrasound absorption in heart tissue decreases by about 20% as temperature increases from room temperature to body temperature. The tissue remained stable for 4 hours at cool temperatures but showed changes at warmer temperatures.
John R. Klepper et al. · 1977
This 1977 study developed ultrasonic tomography techniques to measure tissue properties by analyzing how sound waves interact with biological materials. Researchers used excised dog hearts to test methods for reducing artifacts that interfere with accurate tissue imaging. The work focused on improving medical imaging technology rather than studying health effects.
André-Jean BERTEAUD, Michèle DARDALHON · 1977
This 1977 French review examined biological effects of microwave radiation across molecular, cellular, and tissue levels. The authors found that while numerous studies showed effects at low and medium power levels, the evidence wasn't sufficient to establish safety standards below thermal (heating) thresholds. The review highlighted frequency-dependent effects and called for better understanding of microwave interactions with living systems.
Christopher H. Dodge, Zorach R. Glaser · 1977
This 1977 review examined international research on microwave and radiofrequency radiation effects from 1970-1976, comparing findings between Western and Soviet scientists. The analysis revealed growing evidence that EMF exposure could affect nervous system function in animals at power levels below what Western standards considered harmful, though clinical studies in humans showed conflicting results between regions.
R. S. Molday, S. P. S. Yen, A. Rembaum · 1977
Researchers applied electric pulses of a few thousand volts per centimeter to human red blood cells for microseconds, causing the cell membranes to develop controlled pores that could later reseal. This 1977 study demonstrated that brief, intense electric fields can temporarily breach cellular barriers in predictable ways.
NEUKOMM Peter A. · 1977
This 1977 engineering research examined the technical challenges of designing small antennas that could be mounted directly on the human body for biomedical telemetry applications. The study focused on how body-mounted antennas perform differently than traditional antennas due to their close proximity to human tissue. This work laid important groundwork for understanding how electromagnetic fields interact with the human body when devices are worn or implanted.
John C. H. Wang · 1977
This 1977 FCC technical report studied environmental electromagnetic radiation levels from broadcast transmitters, measuring field strength and power density across different locations. The research was part of early efforts to document baseline EMF exposure levels in communities near radio and television broadcasting facilities. This work helped establish measurement protocols that would inform later EMF exposure guidelines.
WIESLAW WIKTOR-JEDRZEJCZAK et al. · 1977
Researchers exposed mice to 2450 MHz microwave radiation for 30 minutes and found significant increases in specific immune cells in the spleen. The effect became even stronger with repeated exposures, suggesting microwave radiation can alter immune system function in mammals.
Lövsund, P., Öberg, P.A., Nilsson, S.E.G. · 1977
Swedish researchers exposed frog retinal nerve cells to extremely low frequency (ELF) magnetic fields at levels known to cause visual disturbances in humans (0-80 mT, 10-50 Hz). They found that these nerve cells responded to magnetic field changes just like they respond to light, with the response varying based on field strength and frequency.
David L. Conover · 1977
This 1977 conference paper examined workplace safety issues for workers exposed to radio frequency radiation in the 10-40 MHz range, focusing on industrial hygiene monitoring and measurement challenges. The research addressed practical problems with field strength monitors and calibration methods used to assess personnel exposure levels. This represents early recognition that RF workplace exposures needed systematic safety evaluation and proper measurement protocols.
Kinn JB · 1977
This 1977 study measured how much 2450 MHz microwave radiation (the same frequency used in microwave ovens) was absorbed by rats and mice of different sizes. Researchers found that even animals of similar weight could absorb radiation at vastly different rates - up to seven times more in some cases than others.
Tikhonchuk VS · 1977
This 1977 Soviet research examined how mice recovered from microwave radiation exposure at 2400 MHz, the same frequency used in modern WiFi and microwave ovens. The study focused on biological recovery processes following microwave irradiation. This early research provides historical context for understanding how microwave frequencies affect living organisms.
Peter E. Glaser · 1977
This 1977 technical analysis examined the feasibility of satellite solar power systems (SSPS) that would collect solar energy in space and beam it to Earth using microwaves. The study outlined the technology requirements, economic projections, and potential environmental impacts, including concerns about microwave biological effects from the power transmission beams.
Unknown authors · 1977
This 1977 government report established standardized procedures for testing microwave oven radiation leakage in the field. The document provided technical protocols for measuring electromagnetic emissions from microwave ovens to ensure they met safety standards. This represented early recognition that microwave devices required systematic monitoring for radiation exposure protection.
Gandhi OP, Hagmann MJ · 1977
This 1977 study used computer models and phantom experiments to map how radiofrequency energy is absorbed throughout the human body. Researchers found that energy absorption varies dramatically with frequency and surrounding environment, with people standing on ground absorbing seven times more RF energy than in free space.
L-E. Paulsson, Y. Hamnerius, W. G. McLean · 1977
Researchers exposed rabbit brain tissue and nerve cells to 3.1 GHz pulsed microwave radiation to test whether it could damage microtubules, the cellular structures responsible for transporting materials within cells. They found no effects on microtubule function, protein binding, or nerve transport at power levels below 4,000 watts per square meter. This suggests that microwave radiation at typical environmental levels may not directly disrupt these fundamental cellular processes.
Meterless · 1977
This 1977 research explored using liquid crystal technology to monitor microwave radiation without traditional meters. The study investigated temperature-dependent liquid crystals as a way to detect and measure radiofrequency power levels. This represents early work on alternative radiation monitoring methods during the emergence of microwave technology.
M. D. Grossi, G. Colombo · 1977
NASA studied a proposed space-based solar power system that would beam 10 gigawatts of microwave energy to Earth at 2.3 GHz. By retuning to 22.2 GHz (water absorption frequency), the system could deliver power densities of 100-1000 watts per square meter to Earth's surface. The study explored how this intense microwave beam could modify weather patterns by heating atmospheric water vapor.
Howard I. Bassen, William A. Herman · 1977
This 1977 technical study developed precise methods for measuring microwave power density in laboratory settings using specialized antennas and chambers. Researchers achieved measurement accuracy within 0.56 dB at 2450 MHz and 0.76 dB at 915 MHz frequencies. The work established calibration standards for equipment used to measure microwave exposure levels.
Eggert, S., Goltz, S., Kupfer, J. · 1977
This 1977 East German technical report documented the development of a specialized meter designed to measure the electrical component of radiofrequency electromagnetic fields in near-field conditions. The research focused on creating measurement tools for RF field assessment, representing early technical work in electromagnetic field monitoring capabilities during the Cold War era.
O. BALZANO, O. GARAY, R.F. STEEL · 1977
This 1977 study measured how 6-watt portable radio transmitters heat simulated body tissue at different distances. Researchers found that VHF frequencies primarily heated surface fat layers, while UHF frequencies penetrated deeper into muscle tissue, with heating effects becoming negligible beyond 2 inches from the device.
A. MAMOUNI, F. BLIOT, Y. LEROY, Y. MOSCHETTO · 1977
This 1977 study developed improved methods for measuring temperature and microwave properties of biological tissues using radiometers. Researchers found that traditional temperature measurements can be inaccurate because the microwave signals depend on the material's temperature, electrical properties, and thickness. They created new techniques to measure both temperature and microwave characteristics more accurately in biological materials.
J. C. Corelli, R. J. Gutmann, S. Kohazi, J. Levy · 1977
Researchers exposed E. coli bacteria to microwave radiation at frequencies between 2.6-4.0 GHz for 10-12 hours at absorbed power levels of 20 mW in 1 ml of cellular suspension (a specific absorption rate of 20 W/kg). They found no effects on the bacteria's ability to form colonies or changes in their molecular structure. This suggests these particular microwave frequencies at this power level don't damage this strain of bacteria.
