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.
WHO Expert Committee with the participation of ILO · 1977
This 1977 WHO technical report examined the scientific methods used to establish safe exposure limits for harmful agents in workplace settings. The document analyzed how regulatory agencies determine what levels of toxic substances workers can be exposed to without significant health risks. This foundational work established principles that continue to influence how we set safety standards for electromagnetic fields and other environmental hazards today.
Ezra B. Larsen, John F. Shafer · 1977
The National Bureau of Standards measured electromagnetic field intensities around FAA transmitting antennas including aircraft radars, ground surveillance systems, and communication equipment. They found that direct beams from air route and airport surveillance radars exceeded 10 mW/cm² within 14-15 meters of antennas, but fields in areas accessible to personnel were generally below 1 mW/cm².
Frank M. Greene · 1977
This 1977 technical report by Frank Greene focused on developing methods to measure how much radiofrequency (RF) power biological specimens absorb when exposed to electromagnetic fields. The research addressed fundamental measurement challenges that were critical for understanding how RF energy interacts with living tissue. This work helped establish the scientific foundation for evaluating RF exposure levels in biological systems.
C. H. Dodge, Z. R. Glaser · 1977
This 1977 review examined international research on microwave and radiofrequency radiation effects from 1970-1977. The study found growing evidence that electromagnetic fields can affect nervous system function in animals at power levels far below those considered harmful in Western standards. It highlighted a dramatic difference between Soviet exposure limits (0.01 mW/cm²) and US standards (10 mW/cm²).
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.
O. BALZANO, O. GARAY, R.F. STEEL · 1977
Researchers measured how 6-watt portable radio transmitters heat simulated human tissue at different frequencies and distances. They found VHF frequencies mainly heated surface fat layers, while UHF frequencies penetrated deeper into muscle tissue. At distances greater than 2 feet, temperature increases were minimal.
Unknown authors · 1977
This 1977 WHO/ILO technical report examined the scientific methods and criteria used to establish safe exposure limits for harmful workplace substances. The research addressed how regulatory agencies determine what levels of occupational hazards are considered acceptable for worker health. This foundational work established principles still used today for setting EMF exposure standards.
Q. BALZANO, O. GARAY, R.F. STEEL · 1977
This 1977 study measured how different portable radio transmitters deposit energy in simulated biological tissue at various distances. Researchers found that VHF helical antennas primarily heated surface fat layers, while UHF quarter-wavelength antennas penetrated deeper into muscle tissue. Beyond 2 inches distance, temperature increases became negligible.
R. H. Lenox, J. L. Meyerhoff, O. P. Gandhi, H. L. Wray · 1977
Researchers tested how microwave radiation affects brain chemistry in rats, specifically measuring cyclic AMP levels in different brain regions. They found that microwave exposure altered brain metabolism at different rates depending on the brain region, with the hypothalamus, cortex, and cerebellum responding differently. The study highlighted technical challenges in controlling microwave exposure parameters for consistent results.
DeWitt G. Hazzard, Ph.D. · 1977
This 1977 symposium documented electromagnetic radiation emissions from common consumer electronics operating below 500 MHz, including CB radios, medical devices, and household appliances. The Bureau of Radiological Health investigated three key sources - RF sealers, electrosurgical units, and CB radios - measuring their near-field radiation levels. The research highlighted widespread public exposure to RF radiation from everyday electronic products decades before modern wireless technology.
US Army Environmental Hygiene Agency · 1977
This 1977 US Army technical manual provided training on microwave and laser hazards in laboratory settings, covering electromagnetic wave safety protocols and power density measurements. The manual addressed occupational exposure risks for military personnel working with high-powered microwave equipment and antenna systems. It represents early military recognition of electromagnetic field health hazards requiring formal safety training.
H. Jammet et al. · 1977
This 1977 technical report provided comprehensive overviews of nonionizing radiation types including microwave, radiofrequency, ultraviolet, ultrasound, and laser radiation. The report examined protection standards and safety considerations for these various forms of electromagnetic and acoustic energy. This early work helped establish foundational understanding of nonionizing radiation effects and safety protocols.
Richard A. Tell, Patrick J. O'Brien · 1977
This 1977 EPA technical investigation measured broadcast radiation intensities at Mount Wilson, California, a major transmission site hosting numerous radio and television stations. The study documented RF exposure levels from multiple broadcast antennas operating simultaneously at this critical communications hub. This research provided baseline data for understanding cumulative broadcast radiation exposure in areas with concentrated transmission facilities.
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.
P. S. Rai, H. J. Ball, S. O. Nelson, L. E. Stetson · 1977
Researchers exposed mealworm beetles to 39 MHz radiofrequency radiation and found it severely disrupted their ability to reproduce. Higher RF energy levels and longer exposures reduced sperm activity and prevented successful mating, leading to fewer viable eggs.
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.
C. H. Dodge, Z. R. Glaser · 1977
This 1977 review examined international research on biological effects from microwave and radiofrequency radiation exposure. The study found emerging evidence supporting Soviet claims that RF fields can affect nervous system function in animals at power levels below what Western standards considered harmful. The review highlighted a massive gap between Soviet exposure limits (0.01 mW/cm²) and U.S. standards (10 mW/cm²).
C. H. Dodget, Z. R. Glaser · 1977
This 1977 review examined international research on microwave and radiofrequency radiation effects, comparing Western and Soviet findings. The study found emerging evidence that electromagnetic fields could affect nervous system function in animals at power levels below those causing heating, supporting some Soviet claims about biological effects at low exposure levels.
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 power levels of 20 mW/cm². 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.
C. H. Dodge, Z. R. Glaser · 1977
This 1977 Navy-funded review examined international research on microwave and radiofrequency radiation effects from 1970-1977. The authors found emerging Western evidence supporting Soviet claims that EMF can affect nervous system function at power levels below what causes heating. The review highlighted a massive gap between US exposure limits (10 mW/cm²) and Soviet limits (0.01 mW/cm²).
Unknown authors · 1976
This 1976 IEEE symposium brought together engineers and scientists to present research on antennas, wave propagation, and microwave technology. The conference covered fundamental electromagnetic field research that would later inform our understanding of how radio waves and microwaves interact with biological systems. While focused on technical applications, this foundational work established principles still used today in EMF health research.
Wang JCH, Linthicum JM · 1976
This 1976 technical report measured radio frequency field intensities at broadcast facilities including television translators, comparing actual exposure levels to FCC standards. The research documented RF power density measurements at various broadcasting sites to assess electromagnetic radiation levels in these environments.
Wang YC, Hopfer S · 1976
This 1976 technical report developed experimental models for measuring RF radiation hazards, creating tools and methods to assess radiofrequency exposure risks. The research focused on building measurement systems to detect and quantify RF radiation levels that could pose health threats. This work laid important groundwork for understanding how to properly measure electromagnetic field exposures in various environments.
R. A. Tell · 1976
This 1976 technical report measured radio frequency field intensities directly around FM broadcast station antennas to understand actual exposure levels. The study documented RF field strengths in areas where people might be present near these powerful transmission facilities. This type of measurement work helps establish safety guidelines for workers and the public around broadcast infrastructure.
