Mickley GA, Cobb BL · 1998
Researchers exposed rats to microwave radiation at levels that caused significant body heating and found it disrupted their ability to distinguish between familiar and new objects - a key indicator of working memory function. However, rats that had been previously exposed to the heating developed a tolerance that protected them from both the temperature increase and memory problems. The study suggests that microwave-induced heating can impair cognitive function, but the brain may adapt to protect itself from repeated exposures.
Loscher W, Kas G, · 1998
German researchers studied dairy cows living near TV and cell phone transmission towers and found significant behavioral abnormalities over a two-year period. When they moved an affected cow 20 kilometers away from the antennas, its behavior completely normalized within five days, but the problems returned when the cow was brought back. The study suggests that radiofrequency electromagnetic fields from the transmission equipment were the likely cause of these behavioral changes.
Novoselova ET, Fesenko EE. · 1998
Russian researchers exposed mice to extremely weak microwave radiation (8.15-18 GHz at 1 microW/cm²) and found it significantly increased production of tumor necrosis factor in immune cells called macrophages. Tumor necrosis factor is a key protein that triggers inflammation and immune responses in the body. This suggests that even very low-power microwave radiation can alter immune system function.
Jauchem JR et al. · 1998
Researchers exposed 10 anesthetized rats to ultra-wideband electromagnetic pulses at very high intensities (87-104 kV/m electric field strength) for two minutes and monitored their heart rate and blood pressure. They found no immediate changes in either cardiovascular measure during or after exposure. This suggests that short-term exposure to these specific high-intensity electromagnetic pulses does not cause immediate cardiovascular effects in rats.
Grigor'ev IuG, Stepanov VS · 1998
Russian researchers exposed developing chick embryos to electromagnetic fields at power densities between 0.4 and 10 mW/cm2 and found these exposures could alter memory formation (imprinting) processes in the brain. The study showed that EMF exposure during embryonic development left lasting changes in brain function that persisted after hatching. This suggests electromagnetic fields can interfere with critical brain development processes during vulnerable developmental periods.
Behari J, Kunjilwar KK, and Pyne S · 1998
Researchers exposed developing rats to radiofrequency radiation similar to what cell phones emit and found it significantly increased activity of a critical brain enzyme called Na+-K+-ATPase by 15-20%. This enzyme is essential for nerve cell function and brain development. The findings suggest that RF radiation can alter fundamental brain chemistry in developing animals, raising concerns about potential effects on brain development in children.
Adair ER, Kelleher SA, Mack GW, Morocco TS, · 1998
Researchers exposed seven people to 450 MHz radio waves for 45 minutes to study heat effects. The RF energy increased sweating but participants' bodies successfully maintained normal core temperature through natural cooling. This shows human thermoregulation can handle these RF exposure levels effectively.
Phillips et al. · 1998
Researchers exposed immune system cells to radiofrequency radiation from cell phone signals at extremely low power levels for 2 to 21 hours. They found that very low exposures actually reduced DNA damage, while slightly higher exposures increased DNA breaks in the cellular genetic material. This suggests that even minimal RF radiation can alter DNA integrity in immune cells, though the effects varied depending on the specific exposure level.
Kavaliers M, Choleris E, Prato FS, Ossenkopp K · 1998
Researchers exposed land snails to 60-Hz magnetic fields from power lines and found the fields disrupted the animals' natural pain relief systems by altering brain chemistry. This shows that common household electrical frequencies can interfere with basic biological processes controlling pain in living organisms.
Phillips et al. · 1998
Researchers exposed immune cells to cell phone radiation at different power levels and measured DNA damage. They found that very low levels of radiation actually reduced DNA damage, while slightly higher levels increased it. This suggests that cell phone radiation can affect DNA in ways that depend on the specific exposure level.
Unknown authors · 1997
Researchers exposed rats to 60 Hz magnetic fields (the same frequency used in North American power grids) for 2 hours and found dose-dependent DNA damage in brain cells. Higher magnetic field strengths caused both single-strand and double-strand DNA breaks, with effects measured 4 hours after exposure. This DNA damage could potentially contribute to cancer development and neurodegenerative diseases.
Unknown authors · 1997
Researchers exposed rat tracheal cells to gamma radiation alone or combined with 50 Hz electromagnetic fields at 100 microtesla. While EMF alone caused no DNA damage, cells exposed to both gamma radiation and EMF showed significantly more genetic damage than radiation alone. This suggests power frequency fields may amplify cancer-causing effects of other radiation sources.
Unknown authors · 1997
This 1997 study examined how 60 Hz magnetic fields at 2 mT strength affected gene expression in three different human cell lines. The researchers found no significant effects on gene activity, suggesting that power line frequency magnetic fields at this strength don't alter cellular gene expression patterns. This adds to evidence that certain EMF exposures may not cause immediate biological changes at the genetic level.
Unknown authors · 1997
This 1997 study published in Occupational and Environmental Medicine examined the relationship between social connections and mortality risk. The research found that the impact of social relationships on death rates is comparable to well-established mortality risk factors like smoking or obesity. The study highlights how isolation and poor social connections can be as harmful to health as recognized physical risk factors.
Unknown authors · 1997
Researchers exposed human blood cells to 2450 MHz radiofrequency radiation (microwave oven frequency) for 90 minutes and found no genetic damage or changes in cell division. The study tested both continuous and intermittent exposure patterns at power levels similar to some industrial microwave applications.
Unknown authors · 1997
This 2020 comprehensive review examined head and neck squamous cell carcinoma (HNSCC), a cancer affecting the mouth, throat, and voice box areas. The study found that while tobacco and alcohol remain major risk factors, human papillomavirus (HPV) infections are increasingly driving these cancers, particularly in the throat region. This matters because understanding cancer mechanisms helps identify all potential contributing factors, including environmental exposures.
Unknown authors · 1997
This appears to be a misclassified study that actually reviews hydrogel materials used in medical applications like contact lenses and wound dressings, not EMF research. The abstract discusses biocompatible polymers and their tissue-like properties for biomedical uses, with no mention of electromagnetic fields or radiation effects.
Unknown authors · 1997
FDA researchers exposed human T-lymphocyte immune cells to 60 Hz magnetic fields at 0.15 mT (1,500 times stronger than typical household levels) to test whether power line frequencies affect cellular calcium signaling. The study found no changes in intracellular calcium responses under both optimal and stressed cell conditions. However, researchers noted this doesn't rule out effects on other calcium-dependent processes deeper in the cellular pathway.
Unknown authors · 1997
Swedish researchers tested 10 people claiming electrical hypersensitivity and 10 healthy controls by exposing them to flickering light while measuring brain activity. They found that electrically hypersensitive patients showed significantly stronger brain responses to the visual stimulation compared to healthy people, even though their eye responses were normal. This suggests these patients may have heightened nervous system sensitivity that makes them more reactive to environmental stimuli.
Unknown authors · 1997
This 1997 literature review examined skin changes in people reporting "screen dermatitis" from video display terminals and found striking similarities to UV and radiation damage. Researchers documented identical cellular changes including increased mast cells and loss of protective Langerhans cells. The findings suggest EMF exposure may trigger the same inflammatory pathways as known radiation damage.
Unknown authors · 1997
Researchers studied 163 visual display terminal (VDT) workers in Sweden to investigate facial skin symptoms. They found that psychosocial workplace stress, especially lack of social support, increased skin complaints, and this stress appeared to interact with electric fields from computer equipment to worsen symptoms.
Unknown authors · 1997
Researchers in Taiwan studied 3,427 cancer cases to examine whether living near power lines increases cancer risk. They found that people exposed to magnetic fields above 0.2 microtesla had a 40% higher risk of leukemia, and those living within 50 meters of transmission lines faced double the leukemia risk. No increased risk was found for brain tumors or breast cancer.
Unknown authors · 1997
Norwegian researchers studied children living near high-voltage power lines from 1965-1989 to determine if electromagnetic field exposure increases cancer risk. They found no association between magnetic field exposure and childhood cancers, including leukemia and brain tumors. However, the authors noted the study had limited statistical power due to small sample sizes.
Unknown authors · 1997
German researchers studied 129 children with leukemia and 328 healthy controls to examine whether living near power lines increases childhood leukemia risk. They found children exposed to magnetic fields above 0.2 microTesla had over three times higher leukemia odds, though the finding wasn't statistically significant due to small numbers. The results align with other international studies suggesting a possible link between residential power line EMF and childhood blood cancers.
Unknown authors · 1997
Researchers tracked 40,335 electric utility workers from 1960-1991 to study death rates from occupational exposures. They found field workers (linecrew, power plant staff) had 2.2-2.4 times higher rates of respiratory cancers compared to office workers. The study demonstrates clear occupational health risks for workers with higher EMF exposure levels.
