Study type: Medical/biological study (experimental study)

Cytogenetic effects of 900 MHz (GSM) microwaves on human lymphocytes. med./bio.

Published in: Bioelectromagnetics 2001; 22 (2): 91-96

Aim of study (acc. to editor)

To investigate cytogenetic effects of 900 MHz radiofrequency fields on human lymphocytes. Synergisms with the mutagen mitomycin C or X-rays were also investigated.

Endpoint

Exposure

Exposure Parameters
Exposure 1: 900 MHz
Modulation type: CW
Exposure duration: continuous for 2 h
Exposure 2: 900 MHz
Modulation type: pulsed
Exposure duration: continuous for 2 h
Exposure 3: 900 MHz
Modulation type: pulsed
Exposure duration: continuous for 2 h

Exposure 1

Main characteristics
Frequency 900 MHz
Type
Charakteristic
  • guided field
Exposure duration continuous for 2 h
Modulation
Modulation type CW
Exposure setup
Exposure source
Setup Blood in 0.5 ml polypropylene vials was positioned at the center of the TEM cell.
Additional info From each sample a non-exposed control aliquot was investigated as well.
Parameters
Measurand Value Type Method Mass Remarks
power 2 W - - - -
SAR 0.4 W/kg - calculated - -
power 8 W - - - -
SAR 2 W/kg - calculated - -
power 15 W - - - -
SAR 3.5 W/kg - calculated - -
power 25 W - - - -
SAR 5.5 W/kg - calculated - -
power 50 W - - - -
SAR 10 W/kg - calculated - -

Exposure 2

Main characteristics
Frequency 900 MHz
Type
Charakteristic
  • guided field
Exposure duration continuous for 2 h
Modulation
Modulation type pulsed
Additional info

pseudo-random signal (corresponding to a GSM-signal obtained during conversation)

Exposure setup
Exposure source
Parameters
Measurand Value Type Method Mass Remarks
power 2 W - - - -
SAR 0.4 W/kg - calculated - -
power 8 W - - - -
SAR 2 W/kg - calculated - -
power 15 W - - - -
SAR 3.5 W/kg - calculated - -
power 25 W - - - -
SAR 5.5 W/kg - calculated - -
power 50 W - - - -
SAR 10 W/kg - calculated - -

Exposure 3

Main characteristics
Frequency 900 MHz
Type
Charakteristic
  • guided field
Exposure duration continuous for 2 h
Modulation
Modulation type pulsed
Additional info

dummy burst signal (corresponding to the GSM-signal in stand-by mode)

Exposure setup
Exposure source
Parameters
Measurand Value Type Method Mass Remarks
power 2 W - - - -
SAR 0.4 W/kg - calculated - -
power 8 W - - - -
SAR 2 W/kg - calculated - -
power 15 W - - - -
SAR 3.5 W/kg - calculated - -
power 25 W - - - -
SAR 5.5 W/kg - calculated - -
power 50 W - - - -
SAR 10 W/kg - calculated - -

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Time of investigation:
  • after exposure

Main outcome of study (acc. to author)

The investigation was not able to give supporting evidence of a genotoxic effect of 900 MHz microwaves alone or in combination with a chemical or physical mutagen. There was no dose-effect relationship for any of the three modes of radiation.

Study character:

Study funded by

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