To investigate the effects of exposure to a radiofrequency electromagnetic field and to an extremely low frequency magnetic field on the nasal mucosa and nose skin of rats.
Two experiments were performed. In the first experiment, Wistar rats were exposed (n=14) to a radiofrequency electromagnetic field similar to that emitted from GSM mobile phones or sham exposed (n=7). In the second experiment, Sprague-Dawley rats were exposed to an extremely low frequency magnetic field with a magnetic flux density of 100 µT (n=10) or 500 µT (n=10) or sham exposed (n=10).
| Exposure | Parameters |
|---|---|
|
Exposure 1:
900 MHz
Exposure duration:
continuous for 2 h/day, 7 days/week for 10 months
|
|
|
Exposure 2:
50 Hz
Exposure duration:
continuous for 2 h/day, 7 days/week for 10 months
|
|
| Frequency | 900 MHz |
|---|---|
| Type | |
| Exposure duration | continuous for 2 h/day, 7 days/week for 10 months |
| Exposure source |
|
|---|---|
| Distance between exposed object and exposure source | 0.6 cm |
| Setup | rats placed so in a plexiglas carousel that the heads pointed towards the antenna; antenna positioned in the center of the carousel |
| Sham exposure | A sham exposure was conducted. |
| Measurand | Value | Type | Method | Mass | Remarks |
|---|---|---|---|---|---|
| power | 2 W | - | - | - | - |
| Frequency | 50 Hz |
|---|---|
| Type | |
| Polarization | |
| Exposure duration | continuous for 2 h/day, 7 days/week for 10 months |
| Additional info | oriented vertically |
| Exposure source | |
|---|---|
| Setup | pair of Helmholtz coils with a diameter of 25 cm and 225 turns of 1.0 mm diameter insulated soft copper wire, placed horizontally facing each other; rats kept in a methacrylate cage between the coils; animals could move freely inside the cage |
| Sham exposure | A sham exposure was conducted. |
| Measurand | Value | Type | Method | Mass | Remarks |
|---|---|---|---|---|---|
| magnetic flux density | 100 µT | - | measured | - | - |
| magnetic flux density | 500 µT | - | measured | - | - |
In both experiments, no differences were observed between the exposed and the sham exposed rats.
The authors conclude that exposure to a radiofrequency electromagnetic field or to an extremely low frequency magnetic field has no influence on the morphology of the nasal mucosa and nose skin of rats.
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