To study the effects of electromagnetic field exposure from third generation of mobile communication systems on the heart rate, blood pressure and ECG parameters in anaesthetized rats as well as whether melatonin administration can exert any protective effect on these parameters.
36 rats were divided into four groups (each group n=9): 1) exposure group, 2) exposure + melatonin (5 mg/kg body weight, daily for 20 days) group, 3) control group, 4) control + melatonin group. Parameters were recorded before the first and the final day of the experiment.
| Exposure | Parameters |
|---|---|
|
Exposure 1:
1.9–2.2 GHz
Exposure duration:
40 min/day for 20 days
|
- |
rats were treated in four groups: i) EMF exposure ii) EMF exposure + melatonin iii) control iv) control + melatonin
| Frequency | 1.9–2.2 GHz |
|---|---|
| Type | |
| Exposure duration | 40 min/day for 20 days |
| Exposure source |
|
|---|---|
| Setup | rats kept in 40 cm long, 30 cm wide and 15 cm high plastic cages without wood chip bedding; cell phone placed in contact with the cage's underside; each cell phone for 20 min passive (listening) and for 20 min active (speech) with 20 min recorded speech; cages placed 10 m apart; control group exposed to cell phones in stand-by mode |
No parameters are specified for this exposure.
The data did not show any significant differences in the blood pressure, heart rate and ECG parameters among the groups both before and after the experiment. Melatonin also did not exhibit any additional effects, neither beneficial nor hazardous.
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