Study type: Medical/biological study (experimental study)

Evaluation of the maximum permissible level of low-intensity electromagnetic radiation at mobile connection frequency (1 GHz) by changes in motor activity of Spirostomum Ambiguum med./bio.

Published in: Bull Exp Biol Med 2009; 147 (4): 431-433

Aim of study (acc. to editor)

To study the effect of the maximum permissible level of low intensity electromagnetic irradiation (10 µW/cm², 1 GHz) in Russia (which is much more stringent than in Europe and the USA) on changes of spontaneous motor activity of the protozoa Spirostomum ambiguum.

Background/further details

60 control and 60 exposed spirostomes were investigated after exposure of different durations.



Exposure Parameters
Exposure 1: 1 GHz
Exposure duration: continuous for 15 min, 30 min, 45 min, 1h, 2 hr, 3 hr, 4 hr, 6 hr, 8 hr, 10 hr

Exposure 1

Main characteristics
Frequency 1 GHz
Exposure duration continuous for 15 min, 30 min, 45 min, 1h, 2 hr, 3 hr, 4 hr, 6 hr, 8 hr, 10 hr
Exposure setup
Exposure source
Measurand Value Type Method Mass Remarks
power density 10 µW/cm² maximum - - -

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Time of investigation:
  • after exposure

Main outcome of study (acc. to author)

Electromagnetic exposure at the mobile connection frequency (1 GHz) at maximum energy flow density permitted in Russia caused serious functional disorders in the studied protozoa Spirostomum ambiguum: reduction of their spontaneous motor activity. This effect was observed after 30 minutes of exposure and occured in the same manner during the prolonged exposure (independent of time).

Study character:

Study funded by

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