Study type: Medical/biological study (experimental study)

Exposure of magnetic bacteria to simulated mobile phone-type RF radiation has no impact on mortality. med./bio.

Published in: IEEE Trans Nanobioscience 2003; 2 (3): 146-149

Aim of study (acc. to author)

To examine the effect of mobile phone radio frequency emissions on magnetite-containing (magnetic) bacteria.

Background/further details

Magnetic and electron microscopic analyses of human brain tissue have revealed that biogenic magnetite in human brain tissue is similar to that of magnetite-containing bacteria. Magnetite-containing bacteria cells and closely related nonmagnetic bacteria cells (control group) were exposed and sham-exposed for 30 min.

Endpoint

Exposure

Exposure Parameters
Exposure 1: 1.8 GHz
Modulation type: pulsed
Exposure duration: continuous for 30 min
  • SAR: 2 W/kg maximum

Exposure 1

Main characteristics
Frequency 1.8 GHz
Type
Charakteristic
  • guided field
Exposure duration continuous for 30 min
Modulation
Modulation type pulsed
Repetition frequency 217 Hz
Additional info

The GSM signal included an 8-Hz component (every 26th pulse was blanked) and a 2-Hz DTX component for 34% of the time.

Exposure setup
Exposure source
Chamber Two waveguides housed in a temperature-controlled CO2 incubator set at 30 °C were selected at random and blinded by a computer for RF or sham exposure.
Setup Six tissue culture Petri dishes (40 mm x 12 mm) containing 3 ml of equally concentrated magnetotactic bacterial cells or CC-26 cells and sealed with laboratory film to make them airtight were placed in each waveguide.
Sham exposure A sham exposure was conducted.
Additional info The exposure system provided very well controlled dosimetry and continuous monitoring of temperature conditions.
Parameters
Measurand Value Type Method Mass Remarks
SAR 2 W/kg maximum - - -

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Time of investigation:
  • after exposure

Main outcome of study (acc. to author)

Both the magnetite-containing bacteria and the nonmagnetite bacterial strain did not show any consistent bioeffects due to radio frequency exposure. Group comparisons did not reveal significant differences in cell mortality.
In the present study previous findings (see publication 11548) could not be replicated.

Study character:

Study funded by

Replicated studies

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