Study type: Medical/biological study (experimental study)

Comparison of bioactivity between GSM 900 MHz and DCS 1800 MHz mobile telephony radiation. med./bio.

Published in: Electromagn Biol Med 2007; 26 (1): 33-44

Aim of study (acc. to author)

To compare the effects of radiofrequency electromagnetic irradiation at 900 MHz, emitted by GSM mobile phones and at 1800 MHz, emitted by DCS mobile phones, on reproductive capacity of the insect Drosophila melanogaster.

Background/further details

There were four exposure groups: group 1 was exposed to GSM 900 MHz with the antenna in contact with the glass vial containing flies, group 2 was exposed to GSM 900 MHz with the antenna of the mobile phone at 1 cm distance from the vial, group 3 was exposed to DCS 1800 MHz with the antenna in contact with the glass vial, and group 4 was sham exposed. Each group consisted of ten female and ten male newly emerged flies.
Ten replicate experiments were carried out.

Endpoint

Exposure

Exposure Parameters
Exposure 1: 900 MHz
Modulation type: pulsed
Exposure duration: 6 min/day for 5 days
Exposure 2: 1,800 MHz
Modulation type: pulsed
Exposure duration: 6 min/day for 5 days

General information

experiments were done in four groups: i) exposure to GSM signal with the phone's antenna in contact with the glass vial containing the flies ii) exposure to GSM signal with the phone's antenna in 1 cm distance of the glass vial containing the flies iii) exposure to DCS signal with the phone's antenna in contact with the glass vial containing the flies iv) sham exposure

Exposure 1

Main characteristics
Frequency 900 MHz
Type
Exposure duration 6 min/day for 5 days
Modulation
Modulation type pulsed
Repetition frequency 217 Hz
Exposure setup
Exposure source
Setup dual band commercial mobile phone in speaking mode
Sham exposure A sham exposure was conducted.
Parameters
Measurand Value Type Method Mass Remarks
power density 0.407 mW/cm² mean measured - +/- 0.061 mW/cm²
electric field strength 22.3 V/m average over time measured - +/- 2.2 V/m at zero distance
electric field strength 13.9 V/m average over time measured - +/- 1.6 V/m at 1 cm distance
magnetic flux density 0.04 µT average over time measured - +/- 0.007 µT at zero distance

Exposure 2

Main characteristics
Frequency 1,800 MHz
Type
Exposure duration 6 min/day for 5 days
Modulation
Modulation type pulsed
Repetition frequency 217 Hz
Exposure setup
Exposure source
Sham exposure A sham exposure was conducted.
Parameters
Measurand Value Type Method Mass Remarks
power density 0.283 mW/cm² mean measured - +/- 0.043 mW/cm²
electric field strength 14.2 V/m average over time measured - +/- 1.7 V/m
magnetic flux density 0.038 µT average over time measured - +/- 0.007µT

Exposed system:

Methods Endpoint/measurement parameters/methodology

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

Main outcome of study (acc. to author)

Both types of exposure decreased significantly and non thermally the insect's reproductive capacity, but GSM 900 MHz seemed to be even more bioactive than DCS 1800 MHz. The effect seemed to be dependent on field intensity and less on carrier frequency.

Study character:

Study funded by

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