Study type: Medical/biological study (experimental study)

Effects of different electromagnetic fields on circadian rhythms of some haematochemical parameters in rats. med./bio.

Published in: Biomed Environ Sci 2009; 22 (4): 348-353

Aim of study (acc. to author)

To study the effects of different electromagnetic fields on some haematochemical parameters of circadian rhythms in rats.

Background/further details

The study was carried out in 18 male and 18 female rats exposed to 50 Hz sinusoid magnetic fields (at magnetic flux densities of 1000 µT, 100 µT, and 0 µT (control group); six rats per group), and in 18 male and 18 female rats exposed to 1.8 GHz electromagnetic fields (at the intensity of 50 V/m, 25 V/m and 0 V/m (control group); six rats per group).
Blood was collected every three hours for 24 h from rats exposed to extremely low frequency electromagnetic fields at 84 weeks of age and from those exposed to radiofrequency electromagnetic fields at 56 weeks of age.

Endpoint

Exposure

Exposure Parameters
Exposure 1: 50 Hz
Exposure duration: continuous for 19 hr/day - number of exposure days not given in this article
Exposure 2: 1.8 GHz
Exposure duration: continuous for 19 hr/day - number of exposure days not given in this article

Exposure 1

Main characteristics
Frequency 50 Hz
Type
Waveform
Exposure duration continuous for 19 hr/day - number of exposure days not given in this article
Exposure setup
Exposure source
  • not specified
Setup 41 cm x 26 cm x 15 cm macrolon cage with stainless-steel wire top
Sham exposure A sham exposure was conducted.
Parameters
Measurand Value Type Method Mass Remarks
magnetic flux density 100 µT - - - -
magnetic flux density 1,000 µT - - - -

Exposure 2

Main characteristics
Frequency 1.8 GHz
Type
Exposure duration continuous for 19 hr/day - number of exposure days not given in this article
Exposure setup
Exposure source
  • not specified
Setup 41 cm x 26 cm x 15 cm macrolon cage with plastic top placed in an anechoic room
Sham exposure A sham exposure was conducted.
Parameters
Measurand Value Type Method Mass Remarks
electric field strength 25 V/m - - - -
electric field strength 50 V/m - - - -

Exposed system:

Methods Endpoint/measurement parameters/methodology

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

Main outcome of study (acc. to author)

Different effects of electromagnetic fields on circadian rhythms of both male and female rats were found. Different changes occurred in some haematochemical parameters for glucose, triglycerides, and total cholesterol.
The authors conclude that exposure to different electromagnetic fields is responsible for the variations of some haematochemical parameters in rats.

Study character:

Study funded by

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