6,486 Studies Reviewed. 85.2% of Original Studies Found Biological Effects. The Evidence is Clear.

Note: This study found no significant biological effects under its experimental conditions. We include all studies for scientific completeness.

Measurement of DNA damage after exposure to electromagnetic radiation in the cellular phone communication frequency band (835.62 and 847.74 MHz).

No Effects Found

Malyapa RS, Ahern EW, Straube WL, Moros EG, Pickard WF, Roti Roti JL. · 1997

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Exposure of cultured mammalian cells to cellular phone communication frequencies at 0.6 W/kg SAR did not cause DNA damage as measured by the alkaline comet assay.

Plain English Summary

Summary written for general audiences

Researchers exposed mouse C3H 10T1/2 fibroblasts and human glioblastoma U87MG cells to FMCW (835.62 MHz) and CDMA (847.74 MHz) radiation at 0.6 W/kg SAR for up to 24 hours. They used the alkaline comet assay to measure DNA damage. No significant differences were found between exposed cells and sham controls.

Why This Matters

The study aimed to investigate whether cellular phone frequency radiation produces DNA damage in vitro. Temperatures were kept at 37 ± 0.3°C during exposure. Each experiment included sham-exposed negative controls and gamma-irradiated positive controls.

Exposure Details

SAR
0.6 W/kg
Source/Device
835.62 and 847.74 MHz
Exposure Duration
24 h

Exposure Context

This study used 0.6 W/kg for SAR (device absorption):

Building Biology guidelines are practitioner-based limits from real-world assessments. BioInitiative Report recommendations are based on peer-reviewed science. Check Your Exposure to compare your own measurements.

Where This Falls on the Concern Scale

Study Exposure Level in ContextStudy Exposure Level in ContextThis study: 0.6 W/kgExtreme Concern - 0.1 W/kgFCC Limit - 1.6 W/kgEffects observed in the Extreme Concern range (Building Biology)FCC limit is 3 times higher than this level
A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 847.7 MHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 847.7 MHzPower lines50/60 Hz5G mm28 GHzLogarithmic scale

Study Details

Mouse C3H 10T1/2 fibroblasts and human glioblastoma U87MG cells were exposed to cellular phone communication frequency radiations to investigate whether such exposure produces DNA damage in in vitro cultures

Two types of frequency modulations were studied: frequency-modulated continuous-wave (FMCW), with a ...

No significant differences were observed between the test group exposed to FMCW or CDMA radiation an...

Our results indicate that exposure of cultured mammalian cells to cellular phone communication frequencies under these conditions at an SAR of 0.6 W/kg does not cause DNA damage as measured by the alkaline comet assay.

Cite This Study
Malyapa RS, Ahern EW, Straube WL, Moros EG, Pickard WF, Roti Roti JL. (1997). Measurement of DNA damage after exposure to electromagnetic radiation in the cellular phone communication frequency band (835.62 and 847.74 MHz). Radiat Res 148(6):618-627, 1997.
Show BibTeX
@article{rs_1997_measurement_of_dna_damage_2921,
  author = {Malyapa RS and Ahern EW and Straube WL and Moros EG and Pickard WF and Roti Roti JL.},
  title = {Measurement of DNA damage after exposure to electromagnetic radiation in the cellular phone communication frequency band (835.62 and 847.74 MHz).},
  year = {1997},
  
  url = {https://meridian.allenpress.com/radiation-research/article-abstract/148/6/618/40733/Measurement-of-DNA-Damage-after-Exposure-to},
}

Quick Questions About This Study

Mouse C3H 10T1/2 fibroblasts and human glioblastoma U87MG cells were used.
FMCW at 835.62 MHz and CDMA at 847.74 MHz were studied.
Cells were exposed at 0.6 W/kg SAR for up to 24 hours.
The alkaline comet assay was used to measure DNA damage.