Study type: Medical/biological study (experimental study)

Preliminary evaluation of nanoscale biogenic magnetite-based ferromagnetic transduction mechanisms for mobile phone bioeffects. med./bio.

Published in: IEEE Trans Nanobioscience 2003; 2 (1): 40-43

Aim of study (acc. to author)

Ferromagnetic transduction models have been proposed as a potential mechanism for mobile phone effects. These models are based on the coupling of radiofrequency and pulsed electromagnetic emissions to biogenic magnetite present in the human brain via either ferromagnetic resonance or mechanical activation of cellular ion channels.
In this study, these models are tested using a bacterial analogue (Magnetospirillum magnetotacticum) which produces intracellular biogenic magnetite similar to that present in the human brain.

Endpoint

Exposure

Exposure Parameters
Exposure 1: 900 MHz
Modulation type: pulsed
Exposure duration: continuous for 16 min
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Exposure 1

Main characteristics
Frequency 900 MHz
Type
Exposure duration continuous for 16 min
Modulation
Modulation type pulsed
Repetition frequency 217 Hz
Additional info

Discontinuous transmission signals (DTX) of 2 Hz were created.

Exposure setup
Exposure source
Setup A sterile plastic tube containing 1 ml of medium was placed on a plastic mount directly above the base of the mobile phone. A tone was generated at 2 min on/ 2 min off and fed by earpiece to the microphone of the mobile phone in order to create periods of DTX signals.
Additional info For sham exposures, the tone sequence was running but the phone was switched off.
Parameters

No parameters are specified for this exposure.

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Time of investigation:
  • after exposure

Main outcome of study (acc. to author)

The data revealed that exposure to mobile phone emissions resulted in a consistent and significantly higher proportion of cell death in exposed cultures versus sham-exposed cultures. Though there seems to be a repeatable trend toward higher cell mortality in magnetite-producing bacteria exposed to mobile phone emissions, it is not yet clear that this would extrapolate to a deleterious health effect in humans.

Study character:

Study funded by

Replication studies

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