Peyman A, Gabriel C, Grant EH, Vermeeren G, Martens L · 2009
Researchers measured how tissue properties change with age in pigs and used this data to calculate radiation absorption (SAR) in children using walkie-talkies. They found that while tissue properties do change significantly with age - mainly due to decreasing water content - these changes don't meaningfully affect how much radiation children absorb compared to adults when using walkie-talkie devices.
Nam KC, Lee JH, Noh HW, Cha EJ, Kim NH, Kim DW. · 2009
Researchers tested 18 people who claimed to be sensitive to electromagnetic fields (called EHS or electromagnetic hypersensitivity) against 19 people without such sensitivity, exposing both groups to real and fake cell phone radiation for 30 minutes. Neither group showed any measurable physical changes or symptoms from the actual radiation exposure, and the supposedly sensitive people couldn't tell the difference between real and fake exposure any better than the control group.
Mizuno Y et al. · 2009
Japanese researchers used brain scans to study whether 30 minutes of exposure to 3G mobile phone radiation (W-CDMA at 1950 MHz) affects blood flow in the brain. Testing nine healthy men with PET scans before, during, and after phone exposure, they found no significant changes in regional brain blood flow compared to fake exposure. This suggests that 3G phone radiation at typical usage levels doesn't measurably alter blood circulation in the brain.
Marino AA, Carrubba S · 2009
Researchers analyzed 55 studies examining whether mobile phone radiation affects brain electrical activity measured by EEG. They found that 87% of these studies were funded by the wireless industry, and that both positive and negative studies had serious methodological flaws that prevented reliable conclusions. The authors argue that this systematic doubt about EMF effects was manufactured by industry funding rather than reflecting genuine scientific uncertainty.
Lee HJ, Lee JS, Pack JK, Choi HD, Kim N, Kim SH, Lee YS. · 2009
Researchers exposed pregnant mice to cell phone signals (CDMA and WCDMA) at high levels throughout their entire pregnancy to test whether this radiation could cause birth defects. The study found no observable harmful effects on the developing fetuses, including no increased death rates, growth problems, or physical abnormalities. This suggests that exposure to these specific types of cell phone radiation during pregnancy may not cause obvious developmental problems in offspring.
Hansteen IL et al. · 2009
Norwegian researchers exposed human immune cells (lymphocytes) to 2.3 GHz radiofrequency radiation - similar to what cell phones emit - for an entire cell cycle to see if it would damage DNA or chromosomes. They found no statistically significant genetic damage compared to unexposed cells, even when they added a known DNA-damaging chemical to make cells more vulnerable. This suggests that RF radiation at levels used by mobile devices may not directly break chromosomes in immune cells under these laboratory conditions.
Hansteen IL et al. · 2009
Norwegian researchers exposed human immune cells (lymphocytes) to high-frequency microwave radiation at levels similar to industrial applications for 53 hours to test for DNA damage. They found no statistically significant genetic damage from either continuous 18.0 GHz or pulsed 16.5 GHz radiation, though the pulsed exposure showed a non-significant trend toward increased genetic abnormalities that the researchers said needs further study.
de Gannes FP et al. · 2009
French researchers exposed pregnant rats to 2450 MHz microwave radiation (the same frequency used in microwave ovens and WiFi) for 7 hours daily over 30 days to test whether this exposure affects immune function or causes birth defects. They found no effects on immune system markers or fetal development at the power levels tested. This study was designed to confirm earlier Russian and Ukrainian research that had suggested potential harmful effects.
Billaudel B, Taxile M, Ruffie G, Veyret B, Lagroye I. · 2009
Researchers exposed mouse cells to cell phone signals (DAMPS and GSM) for one hour to see if it would increase activity of ornithine decarboxylase (ODC), an enzyme linked to cell growth and potentially cancer development. They found no significant changes in ODC activity at exposure levels of 2.5 and 6 W/kg, contradicting some earlier studies that reported increased enzyme activity. This suggests that under controlled temperature conditions, these specific cell phone signals may not trigger this particular cellular response.
Billaudel B et al. · 2009
Researchers exposed human brain tumor cells to cell phone radiation similar to DAMPS and GSM signals for up to 24 hours, then measured changes in an enzyme called ornithine decarboxylase (ODC) that's involved in cell growth. They found no changes in ODC activity regardless of the type of signal, exposure duration, or radiation intensity. This suggests that typical cell phone radiation levels don't affect this particular cellular process in brain cells.
Ahlbom A et al. · 2009
Researchers from the International Commission for Non-Ionizing Radiation Protection reviewed all available studies on mobile phone use and brain tumor risk through 2009. They found no increased risk of brain tumors within approximately 10 years of mobile phone use, though they noted the observation period may be too short to detect slow-growing tumors that could take decades to develop. The review acknowledged significant methodological problems in existing studies, including biased recall of phone usage patterns.
Sannino A et al. · 2009
Researchers exposed human skin cells to 900 MHz radiofrequency radiation (similar to cell phone signals) for 24 hours at 1 W/kg to test for DNA damage. They found no genetic damage from the RF exposure alone, even when testing cells from people with Turner's syndrome who may be more sensitive. The radiation also didn't make cells more vulnerable to damage from a known water contaminant.
Furubayashi T et al. · 2009
Japanese researchers exposed 54 women to cell tower-like radio waves for 30 minutes to test whether people who report mobile phone sensitivity can actually detect electromagnetic fields. They found that sensitive individuals couldn't tell when they were being exposed any better than control subjects, but they consistently reported more discomfort regardless of whether the EMF was on or off. This suggests that electromagnetic hypersensitivity symptoms aren't directly caused by the radio waves themselves.
Güler G, Türközer Z, Ozgur E, Seyhan N. · 2009
Researchers exposed lung tissue to extremely strong electric fields (12,000 volts per meter) for 8 hours daily over 7 days to test whether antioxidants could prevent damage. They found only minor increases in one marker of cellular damage (protein carbonyl), while other damage indicators remained unchanged. The study suggests that at these exposure levels, electric fields cause minimal lung tissue damage that antioxidants may help prevent.
Güler G, Türközer Z, Ozgur E, Tomruk A, Seyhan N, Karasu C · 2009
Researchers exposed guinea pigs to power line frequency electric fields (12 kV/m for 8 hours daily over 7 days) to study protein damage and whether the antioxidant N-acetyl-L-cysteine could protect against it. The study found no significant protein damage from the electric field exposure alone, though it did reduce a protein synthesis marker in the liver. The antioxidant treatment showed some effects on protein markers, suggesting it may have biological activity in this context.
Aldinucci C et al. · 2009
Italian researchers exposed rat brain nerve terminals (synaptosomes) to 50 Hz magnetic fields at 2 milliTesla for 2 hours to study effects on basic cellular functions. They found no changes in energy production, calcium levels, membrane function, or oxidative stress markers. This suggests that power-frequency magnetic fields at this intensity don't disrupt fundamental brain cell processes.
Söderqvist F, Carlberg M, Hardell L · 2009
Researchers measured blood levels of S100B protein (a marker of blood-brain barrier damage) in 314 Swedish adults to see if wireless phone use affected brain barrier function. They found no significant association between mobile or cordless phone use and elevated S100B levels, suggesting these devices don't appear to damage the protective barrier around the brain based on this marker.
Rağbetli MC, Aydinlioğlu A, Koyun N, Rağbetli C, Karayel M. · 2009
Researchers exposed pregnant mice to mobile phone radiation and examined whether it affected brain cell development in their offspring, specifically counting pyramidal cells in the hippocampus (a brain region crucial for memory and learning). They found no significant difference in brain cell numbers between exposed and unexposed mouse pups. While this suggests no developmental harm at the exposure levels tested, the researchers noted that more studies are needed given widespread mobile phone use around pregnant women.
Parazzini M et al. · 2009
Researchers exposed 134 healthy young adults to 20 minutes of radiofrequency radiation from UMTS mobile phones at maximum power while testing their hearing function before and after exposure. The study found no consistent changes in hearing ability, ear function, or auditory processing after the RF exposure. This suggests that short-term exposure to cell phone radiation at typical usage levels does not cause immediate measurable damage to human hearing.
Ogawa K et al. · 2009
Researchers exposed pregnant rats to cell phone radiation (1.95-GHz W-CDMA signals) for 90 minutes daily during the critical period of fetal development (days 7-17 of pregnancy). They found no harmful effects on pregnancy outcomes, fetal development, or birth defects at exposure levels up to 2.0 W/kg brain SAR. This suggests that typical cell phone radiation exposure during pregnancy may not cause developmental problems in offspring.
Lipping T et al. · 2009
Researchers exposed anesthetized pigs to GSM mobile phone radiation (890 MHz) to test whether radio frequency signals could trigger brain activity changes detectable in EEG measurements. The study used a highly sensitive testing method where anesthetized animals show exaggerated responses to even minor stimuli. Despite exposure levels of 31 W/kg (much higher than typical phone use), no changes in brain electrical activity were observed, though the animals did experience increased body temperature and heart rate.
Kwon MS et al. · 2009
Finnish researchers tested whether GSM mobile phone radiation affects the brain's ability to automatically detect changes in sounds, a key function for processing speech and music. They measured brain responses in 17 healthy adults while exposing them to 902 MHz radiation at levels typical of cell phone use (SAR up to 1.21 W/kg). The study found no changes in the brain's automatic sound processing abilities during EMF exposure.
Finnie JW, Chidlow G, Blumbergs PC, Manavis J, Cai Z · 2009
Researchers exposed pregnant mice to 900 MHz cell phone radiation (at 4 W/kg) for one hour daily throughout pregnancy to see if it caused stress in developing fetal brains. They found no evidence of cellular stress responses when they examined the brain tissue using specialized markers called heat shock proteins. This suggests that this level of radiofrequency exposure during pregnancy may not trigger detectable stress responses in developing brain tissue.
Finnie JW, Blumbergs PC, Cai Z, Manavis J · 2009
Researchers exposed mice to cell phone radiation at 900 MHz for either one hour or two years to see if it would increase a brain protein called aquaporin-4, which rises when the blood-brain barrier becomes leaky. They found no increase in this protein after either short or long-term exposure, suggesting that cell phone radiation at this level doesn't make the blood-brain barrier more permeable.
Eltiti S et al. · 2009
Researchers exposed 88 people (including those who claimed to be sensitive to electromagnetic fields) to cell tower signals for 50 minutes while they performed memory and attention tests. The study found no effects on cognitive performance or physiological measures like heart rate and skin conductance in either sensitive or control participants. This suggests that short-term exposure to typical cell tower radiation levels doesn't impair brain function or cause detectable physical responses.
