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Cellular Effects

Effects of ELF magnetic field in combination with Iron(III) chloride (FeCl3) on cellular growth and surface morphology of Escherichia coli (E. coli).

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Esmekaya MA, Acar SI, Kıran F, Canseven AG, Osmanagaoglu O, Seyhan N. · 2013

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Magnetic field exposure damaged bacterial cell membranes even when standard viability tests showed no effect, revealing hidden cellular damage.

Plain English Summary

Summary written for general audiences

Scientists exposed E. coli bacteria to 50 Hz magnetic fields for 24 hours. While the bacteria survived normally, the magnetic field exposure damaged their cell surfaces, creating holes and destroying membranes. This shows EMF can harm cells even when they appear healthy overall.

Why This Matters

This study reveals something important about how we assess EMF biological effects. The researchers found that standard viability tests showed no harm, but deeper investigation using electron microscopy revealed clear structural damage to bacterial cell membranes. This pattern appears repeatedly in EMF research - effects that aren't immediately obvious through conventional testing become apparent with more sophisticated analysis. The 2 millitesla exposure level used here is quite high compared to typical household magnetic field exposure, which usually ranges from 0.01 to 0.2 millitesla. However, the finding that EMF can damage cell membranes while leaving basic cellular functions intact raises questions about what other subtle but potentially significant effects we might be missing when we only look at surface-level indicators of biological harm.

Exposure Details

Magnetic Field
2 mG
Source/Device
50 Hz
Exposure Duration
24 h

Exposure Context

This study used 2 mG for magnetic fields:

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: 2 mGExtreme Concern - 5 mGFCC Limit - 2,000 mGEffects observed in the Severe Concern rangeFCC limit is 1,000x higher than this level
A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 50 Hz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 50 HzCell phones~1 GHzWiFi2.4 GHz5G mm28 GHzLogarithmic scale

Study Details

This study investigated the effects of extremely low frequency (ELF) magnetic field with/without iron(III) chloride (FeCl3) on bacterial growth and morphology.

The ELF exposures were carried out using a pair of Helmholtz coil-based ELF exposure system which wa...

No significant results were seen in terms of cell viability between ELF and sham-exposed bacterial s...

We concluded that ELF magnetic field exposure at 2 mT does not affect cell viability; however, it may affect bacterial surface morphology.

Cite This Study
Esmekaya MA, Acar SI, Kıran F, Canseven AG, Osmanagaoglu O, Seyhan N. (2013). Effects of ELF magnetic field in combination with Iron(III) chloride (FeCl3) on cellular growth and surface morphology of Escherichia coli (E. coli). Appl Biochem Biotechnol. 169(8):2341-2349, 2013.
Show BibTeX
@article{ma_2013_effects_of_elf_magnetic_641,
  author = {Esmekaya MA and Acar SI and Kıran F and Canseven AG and Osmanagaoglu O and Seyhan N.},
  title = {Effects of ELF magnetic field in combination with Iron(III) chloride (FeCl3) on cellular growth and surface morphology of Escherichia coli (E. coli).},
  year = {2013},
  doi = {10.1007/s12010-013-0146-x},
  url = {https://link.springer.com/article/10.1007/s12010-013-0146-x},
}
DOI: 10.1007/s12010-013-0146-x

Cited By (5 papers)

Quick Questions About This Study

Yes, 24-hour exposure to 50 Hz magnetic fields at 2 mT damaged E. coli cell membranes, creating pores and destroying surface structures. However, the bacteria remained viable and continued growing normally despite this membrane damage, suggesting EMF can harm cellular structures without killing cells.
This 2013 study found that iron chloride (FeCl3) treatment did not increase E. coli sensitivity to 50 Hz magnetic fields. Both with and without iron treatment, magnetic field exposure caused similar membrane damage while bacteria survival rates remained unchanged.
The study exposed E. coli bacteria to 50 Hz magnetic fields for 24 hours before observing membrane damage. Researchers found pore formation and surface destruction after this exposure period, though they did not test shorter durations to determine minimum timing.
E. coli bacteria maintained normal viability even with damaged membranes because the 50 Hz magnetic field exposure affected surface structures without disrupting essential cellular functions needed for survival and reproduction. The damage was morphological rather than lethal to the cells.
The 2 mT (millitesla) magnetic field used in this bacterial study is extremely strong compared to typical household exposure. Most homes experience 0.1-0.2 mT near appliances, making these bacterial findings less directly applicable to everyday EMF exposure levels.