Study type: Medical/biological study (experimental study)

Effects of microwave irradiation on some membrane-related processes in bacteria. med./bio.

Published in: Gen Physiol Biophys 1987; 6 (1): 57-64

Aim of study (acc. to author)

To study athermal effects of microwave exposure on some biological processes depending on the cell membrane activity in bacteria (intact cells or spheroplasts).

Endpoint

Exposure

Exposure Parameters
Exposure 1: 38.46–50 GHz
Exposure duration: 15 min

Exposure 1

Main characteristics
Frequency 38.46–50 GHz
Charakteristic
  • guided field
Exposure duration 15 min
Additional info Wavelength of 6.0 mm to 7.8 mm was used.
Modulation
Modulation type unspecified
Exposure setup
Exposure source
Setup Cultures were sucked into pipette tips and the tips were placed directly into the outlet of the waveguide.
Additional info Two identical cuvettes, made of stainless steel, were used for control and experiment.
Parameters
Measurand Value Type Method Mass Remarks
power density 50 W/m² unspecified measured - -

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Time of investigation:
  • after exposure

Main outcome of study (acc. to author)

The authors failed to detect non-thermal effects of microwaves on some membrane-relating processes in E. coli and B. subtilis. Thymine and thymidine uptake, leakage of potassium and hydrogen ions as well as the uptake of the transforming DNA (by B. subtilis) were shown to be affected in a way typical of that due to heating of a sample. No specific dependence of the effects measured on wavelength was observed.

Study character:

Study funded by

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