Study type: Medical/biological study (experimental study)

Absence of chromosomal damage in human lymphocytes exposed to microwave radiation with hyperthermia med./bio.

By: Lloyd DC, Saunders RD, Moquet JE, Kowalczuk CI
Published in: Bioelectromagnetics 1986; 7 (2): 235-237
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Aim of study (acc. to editor)

To study chromosomal damage in human lymphocytes exposed to microwave radiation with hyperthermia.

Endpoint

Exposure

Exposure Parameters
Exposure 1: 2.45 GHz
Exposure duration: 20 min
  • SAR: 4 mW/g minimum (unspecified) (40 W/kg, 100 W/kg.)
  • SAR: 200 mW/g maximum (unspecified)

Exposure 1

Main characteristics
Frequency 2.45 GHz
Type
Waveform
Charakteristic
  • guided field
Exposure duration 20 min
Additional info Reference Article: Lloyd DC, Saunders RD, Finnon P, Kowalczuk CI (1984): No clastogenetic effect from in vitro microwave irradiation of G0 human lymphocytes. Int. J Radiant Biol 46: 135-141.
Exposure setup
Exposure source
Setup Two replicates of 2 ml aliquots were irradiated in waveguide during which the temperature rose from 37°C to 40°C in 5 min and remained constant for the remaining period.
Additional info Control tubes were kept at 37°C in water bath. Details of exposure set-up and method of dosimetry are described in the reference article.
Parameters
Measurand Value Type Method Mass Remarks
SAR 4 mW/g minimum unspecified unspecified 40 W/kg, 100 W/kg.
SAR 200 mW/g maximum unspecified unspecified -

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Time of investigation:
  • after exposure

Main outcome of study (acc. to author)

The authors have been unable to demonstrate a positive clastogenic effect at hyperthermic temperatures for 20 min of microwave irradiation even at SAR above the proposed average whole-body limit of 0.4 W/kg for occupational exposure to persons in the UK.

Study character:

Study funded by