Study type: Medical/biological study (experimental study)

Diverse radiofrequency sensitivity and radiofrequency effects of mobile or cordless phone near fields exposure in Drosophila melanogaster. med./bio.

Published in: PLoS One 2014; 9 (11): e112139

Aim of study (acc. to author)

The effects of a near field exposure of Drosophila melanogaster to 900 and 1880 MHz electromagnetic fields on the oviposition should be investigated.

Background/further details

Flies were kept and exposed in glass vials. Male and female animals were separately exposed during the first two days and from day 3 on, they were exposed in groups of 8 male and 8 female individuals per vial. For each exposure source, 5 vials were exposed and 5 vials were used as control. A mobile phone and a cordless phone were used as exposure sources.

Endpoint

Exposure

Exposure Parameters
Exposure 1: 864.1–868.1 MHz
Modulation type: pulsed
Exposure duration: continuous for 20 min/day for 5 days
  • power: 2 W maximum
  • SAR: 5 mW/kg (for flies)
Exposure 2: 1,880 MHz
Exposure duration: continuous for 20 min/day for 5 days
  • power: 0.25 W maximum
  • SAR: 0.7 mW/kg (for flies)

Exposure 1

Main characteristics
Frequency 864.1–868.1 MHz
Type
Charakteristic
Exposure duration continuous for 20 min/day for 5 days
Additional info mobile phone
Modulation
Modulation type pulsed
Repetition frequency 217 Hz
Exposure setup
Exposure source
Chamber flies were kept in 50 ml glass vials (10 cm high, 2.5 cm in diameter) also containing food
Setup glass vials were placed in direct lateral contact with the antenna of the phone
Parameters
Measurand Value Type Method Mass Remarks
power 2 W maximum - - -
SAR 5 mW/kg - estimated - for flies

Exposure 2

Main characteristics
Frequency 1,880 MHz
Type
Charakteristic
Exposure duration continuous for 20 min/day for 5 days
Additional info cordless phone
Exposure setup
Exposure source
Parameters
Measurand Value Type Method Mass Remarks
power 0.25 W maximum - - -
SAR 0.7 mW/kg - estimated - for flies

Exposed system:

Methods Endpoint/measurement parameters/methodology

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

Main outcome of study (acc. to author)

No significant differences could be observed in the quantity of oviposition between the 1880 MHz group and the control group. However, a significant decrease in the number of eggs was observed in the 900 MHz GSM group compared to the control group and to the 1880 MHz group.
The authors conclude that a near field exposure to a 900 MHz GSM field from a mobile phone means a more intense stress factor for Drosophila melanogaster with effects on reproduction than an exposure to a 1880 MHz field from a cordless phone.

Study character:

Study funded by

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