Study type: Medical/biological study (experimental study)

Activity of membrane-bound enzymes exposed to sinusoidally modulated 2450-MHz microwave radiation. med./bio.

Published in: Radio Sci 1979; 14: 85-91

Aim of study (acc. to author)

The activity of two membrane-bound enzyme systems were studied during exposure to test the hypothesis if electromagnetic irradiation can alter the function of such systems.

Background/further details

Mitochondrial cytochrome oxidase was isolated from rat liver tissue, and sodium potassium ATPase (Na+-K+-ATPase) from rat erythrocytes.



Exposure Parameters
Exposure 1: 2.45 GHz
Modulation type: AM
Exposure duration: not given in the article

Exposure 1

Main characteristics
Frequency 2.45 GHz
Exposure duration not given in the article
Modulation type AM
Modulation frequency 16–120 Hz
Modulation depth 100 %
Additional info

16, 30, 90, and 120 Hz

Exposure setup
Exposure source
  • Cary 15 spectrophotometer with slotted waveguide applicator
Sham exposure A sham exposure was conducted.
Measurand Value Type Method Mass Remarks
SAR 26 mW/g - calculated - -

Reference articles

  • Allis JW et al. (1977): Measurement of microwave radiation absorbed by biological systems, 1. Analysis of heating and cooling data.
  • Allis JW et al. (1975): Crossed-beam apparatus for simultaneous spectrophotometric observation and microwave exposure of biochemical samples.
  • Allis JW (1975): Discussion paper: Irradiation of bovine serum albumin with a crossed-beam exposure-detection system.

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Time of investigation:
  • during exposure

Main outcome of study (acc. to author)

No statistically significant differences in enzymatic activity were found between irradiated and control samples. This result applies to both of the tested enzymes and for any of the modulation frequencies used.

Study character:

Study funded by

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