Study type: Medical/biological study (experimental study, observational study)

Cytogenetic Effects of Microwaves from Mobile Communication Frequencies (954 MHz). med./bio.

Published in: Electro Magnetobiol 1995; 14 (2): 91-98

Aim of study (acc. to editor)

The first part of this publication is an experimental in vitro study about the possible effects on human blood lymphocytes caused by 954 MHz irradiation. The second part is an observational in vivo study. In this pilot experiment blood samples obtained from maintenance workers, occupationallly exposed to microwaves of several frequencies, were investigated.

Endpoint

Exposure

Exposure Parameters
Exposure 1: 954 MHz
Modulation type: pulsed
Exposure duration: continuous for 2 h
in vitro study
Exposure 2: 450–900 MHz
Modulation type: pulsed
Exposure duration: repeated daily exposure for at least 1 h/day for at least 1 year
in vivo study
-

Exposure 1

Main characteristics
Frequency 954 MHz
Type
Charakteristic
Exposure duration continuous for 2 h
Additional info in vitro study
Modulation
Modulation type pulsed
Additional info

GSM

Exposure setup
Exposure source
Distance between exposed object and exposure source 5 cm
Setup Heparinized blood samples (10 ml) were aliquoted over three test tubes. Aliquot A was placed 5 cm from the emitting antenna in a cooled box at 17 ± 1 °C. Aliquot B was placed in a metallic box but the conditions were same as for A. Aliquot C served as control and was kept in another room away from the antenna.
Additional info Three aliquots were made from each 10-ml blood sample: exposed, sham-exposed, and outside control.
Parameters
Measurand Value Type Method Mass Remarks
electric field strength 49 V/m unspecified measured - 46-51 V/m
power density 15 W/m² unspecified - - -
SAR 1.5 W/kg unspecified calculated - -

Exposure 2

Main characteristics
Frequency 450–900 MHz
Type
Exposure duration repeated daily exposure for at least 1 h/day for at least 1 year
Additional info in vivo study
Additional info and other frequencies
Modulation
Modulation type pulsed
Exposure setup
Exposure source
Setup Investigation on a limited sample of six workers occupationally exposed.
Additional info A control sample of six healthy men was selected for comparable age and life-style.
Parameters

No parameters are specified for this exposure.

Exposed system:

Methods Endpoint/measurement parameters/methodology

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

Main outcome of study (acc. to author)

In conclusion, the present investigation failed to demonstrate any important cytogenetic damage in in vivo exposed subjects. Some cytogenetic effects were observed in in vitro exposed blood samples but only very close to the antenna.

Study character:

Study funded by

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