Vácha M, Puzová T, Kvícalová M · 2009
Researchers found that weak radio frequency electromagnetic fields can disrupt the magnetic navigation abilities of both birds and cockroaches. Radio waves at just 1.2 MHz - thousands of times weaker than Earth's magnetic field - interfered with the insects' ability to sense direction. This suggests that common radio frequencies might affect the biological compass systems that many animals rely on for navigation.
Söderqvist F, Carlberg M, Hardell L · 2009
Swedish researchers tested whether wireless phone use affects blood-brain barrier integrity by measuring S100B protein levels in 1,000 adults. The study found no significant association between mobile or cordless phone use and elevated S100B levels, suggesting wireless phones don't compromise the blood-brain barrier based on this biomarker.
Söderqvist F, Carlberg M, Hansson Mild K, Hardell L · 2009
Swedish researchers exposed 41 volunteers to 30 minutes of 890 MHz mobile phone radiation (1.0 W/kg) and measured blood markers that indicate if the blood-brain barrier was damaged. While one marker (S100B) showed no change, transthyretin levels increased significantly 60 minutes after exposure, suggesting possible barrier disruption.
Söderqvist F, Carlberg M, Hardell L · 2009
This cross-sectional study of 1,000 Swedish subjects examined whether long-term and short-term use of mobile and cordless telephones was associated with changes in serum transthyretin levels, a marker potentially reflecting effects on the blood-cerebrospinal fluid barrier. The study found sex-dependent associations: men showed higher serum transthyretin with longer use of analogue and combined mobile/cordless phones, but lower levels with UMTS phone use, while women showed higher levels with shorter time intervals after recent phone calls.
Naziroğlu M, Gümral N · 2009
This study investigated whether 2.45 GHz electromagnetic radiation (EMR) from wireless devices affects brain antioxidant systems and EEG activity in rats, and whether selenium and L-carnitine supplementation could provide protective effects. The researchers found that EMR exposure reduced brain concentrations of vitamins A, C, and E, while selenium and L-carnitine supplementation helped restore these levels and reduce lipid peroxidation, with L-carnitine showing a stronger protective effect than selenium.
Unknown authors · 2009
Japanese researchers exposed 64 rats to 915 MHz electromagnetic fields (similar to older cell phone frequencies) for 2 hours at various power levels, then examined their brains 14 and 50 days later. They found no evidence of blood-brain barrier damage or neuronal harm, contradicting an earlier Swedish study that claimed such effects. This represents an important failure to replicate concerning brain damage claims.
Del Vecchio G et al. · 2009
Italian researchers exposed developing brain cells to 900 MHz GSM cell phone radiation at 1 W/kg and found it reduced the growth of neural projections (neurites) that are critical for brain development. The study used both mouse brain cell lines and rat brain neurons, finding consistent effects across both models within 24-72 hours of exposure.
Del Vecchio G et al. · 2009
This in vitro study examined how continuous GSM-modulated radiofrequency electromagnetic field exposure (900 MHz, 1 W/kg SAR) affected neural cell viability and vulnerability to neurotoxic challenges in two cell systems: SN56 cholinergic cells and rat primary cortical neurons. RF exposure alone did not affect cell viability or proliferation, but co-exposure with hydrogen peroxide exacerbated neurotoxic effects in SN56 cells only, while no cooperative effects were observed with glutamate or beta-amyloid.
de Tommaso M et al. · 2009
Researchers exposed 10 healthy volunteers to 900 MHz GSM cell phone signals and measured brain electrical activity using event-related potentials. Both active phones and sham phones (with electromagnetic power dissipated internally) reduced brain arousal responses compared to phones that were completely off. This suggests cell phone exposure affects brain electrical activity and attention processing.
de Gannes FP et al. · 2009
This study examined whether a 2-hour exposure to GSM-900 mobile phone signals would cause blood-brain barrier permeability changes and neuronal degeneration in rats, as previously reported by Salford et al. The researchers exposed rats at various SAR levels and evaluated outcomes at 14 and 50 days post-exposure, finding no statistically significant albumin leakage, neuronal degeneration, or apoptotic neurons across tested groups, contradicting the earlier findings.
Unknown authors · 2009
Croatian researchers exposed onion seeds to radiofrequency fields at 400 MHz and 900 MHz (similar to cell phone frequencies) and found significant increases in abnormal cell division. While seed germination wasn't affected, the electromagnetic fields caused chromosome damage and disrupted normal cell division patterns, suggesting potential biological harm at the cellular level.
Shckorbatov YG et al. · 2009
Ukrainian researchers exposed human mouth cells to 35 GHz microwave radiation at very low power levels (30 microW/cm²) and found it caused DNA packaging (chromatin) to condense abnormally and damaged cell membranes. The type of wave polarization affected the severity of damage, with circularly polarized waves sometimes causing less harm than linearly polarized radiation.
Garaj-Vrhovac V, Gajski G, Trosić I, Pavicić I · 2009
Croatian researchers exposed rats to 915 MHz microwave radiation (similar to older cell phone frequencies) for one hour daily over two weeks. They found significant DNA damage in white blood cells, with evidence pointing to oxidative stress as the primary mechanism. The study used specialized tests to distinguish between direct DNA breaks and damage caused by harmful oxygen molecules.
Garaj-Vrhovac V, Orescanin V · 2009
This study assessed DNA damage in peripheral blood leukocytes from occupationally exposed workers using the alkaline comet assay and chromatid breakage assay to evaluate sensitivity to microwave radiation.
Del Vecchio G et al. · 2009
Researchers exposed developing brain cells to cell phone radiation at 900 MHz (the same frequency used by GSM phones) and found it reduced the number of nerve branches that normally grow during brain development. The radiation also increased production of beta-thymosin, a protein that regulates cell structure, suggesting the EMF interfered with normal neural maturation processes.
Naziroğlu M, Gümral N · 2009
This study examined whether 2.45 GHz electromagnetic radiation affects the brain's antioxidant defense system in rats and whether selenium or L-carnitine supplementation could provide protective effects. Exposure to the radiation for 60 minutes daily over 28 days reduced brain levels of vitamins A, C, and E, while selenium and L-carnitine supplementation partially restored these antioxidant markers, with L-carnitine showing stronger protective effects than selenium.
Rağbetli MC, Aydinlioğlu A, Koyun N, Rağbetli C, Karayel M · 2009
Researchers exposed pregnant mice to mobile phone radiation throughout pregnancy and then examined brain cell counts in their offspring's hippocampus (the brain region crucial for memory and learning). They found no significant difference in the number of pyramidal cells between exposed and unexposed offspring. However, the study lacked important details about exposure levels and duration, making it difficult to assess how these findings relate to human mobile phone use.
Ogawa K et al. · 2009
Researchers exposed pregnant rats to cell phone radiation (1.95-GHz signals) for 90 minutes daily during pregnancy to see if it would harm developing babies. They tested different exposure levels, including some higher than typical cell phone use, and found no effects on pregnancy outcomes, fetal development, or birth defects. The study suggests that cell phone radiation at these levels doesn't appear to cause developmental problems during pregnancy.
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.
Finnie JW, Chidlow G, Blumbergs PC, Manavis J, Cai Z.. · 2009
Researchers exposed pregnant mice to cell phone radiation (900 MHz) for one hour daily throughout pregnancy to see if it caused stress in developing fetal brains. They measured heat shock proteins, which are biological markers that cells produce when under stress. The study found no evidence that the radiation caused stress responses in the fetal brain tissue, suggesting no detectable harm at the exposure levels tested.
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.
Brescia F et al. · 2009
Researchers exposed human immune cells to 1950 MHz cell phone radiation (the frequency used by 3G networks) to see if it would trigger oxidative stress, a cellular damage process linked to aging and disease. They tested various exposure durations and power levels, both alone and combined with iron compounds known to cause oxidative stress. The study found no increase in harmful reactive oxygen species or cell death from the radiation exposure under any conditions tested.
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.
