Study type: Medical/biological study (experimental study)

The effect of exposure duration on the biological activity of mobile telephony radiation. med./bio.

Published in: Mutat Res Genet Toxicol Environ Mutagen 2010; 699 (1-2): 17-22

Aim of study (acc. to author)

To study the effects of different durations of a single, daily exposure (ranging from 1 min. up to 21 min.) to the two established digital mobile phone systems (GSM 900 MHz and DCS 1800 MHz), on the reproductive capacity of the insect Drosophila melanogaster.

Background/further details

Each exposure/sham exposure group consisted of ten female and ten male newly emerged flies kept in separate vials for the first 48 h. After the 48 h, when both males and females of each group were sexually mature, they were put together (10 pairs) in another glass vial and they were allowed to mate and lay eggs for the next 72 h.

Endpoint

Exposure

Exposure Parameters
Exposure 1: 900 MHz
Modulation type: pulsed
Exposure duration: continuous for 1 min., 6 min., 11 min., 16 min. or 21 min./day on 5 days
Exposure 2: 1,800 MHz
Modulation type: pulsed
Exposure duration: continuous for 1 min., 6 min., 11 min., 16 min. or 21 min./day on 5 days

Exposure 1

Main characteristics
Frequency 900 MHz
Type
Exposure duration continuous for 1 min., 6 min., 11 min., 16 min. or 21 min./day on 5 days
Modulation
Modulation type pulsed
Repetition frequency 217 Hz
Additional info

mobile phone in speaking mode (modulated)

Exposure setup
Exposure source
Distance between exposed object and exposure source 30 cm
Sham exposure A sham exposure was conducted.
Parameters
Measurand Value Type Method Mass Remarks
magnetic flux density 0.01 µT average over time measured - +/- 0.002 µT at a distance of 30 cm
power density 10 µW/cm² average over time measured - +/- 2 µW/cm²
SAR 0.795 W/kg average over time measured - -
electric field strength 0.6 V/m average over time measured - +/- 0.1 V/m at a distance of 30 cm

Exposure 2

Main characteristics
Frequency 1,800 MHz
Type
Exposure duration continuous for 1 min., 6 min., 11 min., 16 min. or 21 min./day on 5 days
Modulation
Modulation type pulsed
Repetition frequency 217 Hz
Additional info

mobile phone in speaking mode (modulated)

Exposure setup
Exposure source
Distance between exposed object and exposure source 20 cm
Sham exposure A sham exposure was conducted.
Parameters
Measurand Value Type Method Mass Remarks
SAR 0.795 W/kg average over time measured - -
magnetic flux density 0.01 µT average over time measured - +/- 0.002 µT at a distance of 20 cm
electric field strength 0.65 V/m average over time measured - +/- 0.12 V/m at a distance of 20 cm
power density 11 µW/cm² average over time measured - +/- 3 µW/cm²

Reference articles

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Investigated organ system:
Time of investigation:
  • after exposure

Main outcome of study (acc. to author)

The data showed that the reproductive capacity decreased almost linearly with increasing exposure durations to both GSM 900 MHz and DCS 1800 MHz irradiation, suggesting that short-term exposures to these irradiations have cumulative effects on living organisms. Additionally, these results showed that GSM 900 MHz was slightly more bioactive than DCS 1800 MHz, at the same exposure durations and under equal irradiation intensities, as shown in previous experiments of the authors (see "related articels").

Study character:

Study funded by

Related articles