To study the effects of radiofrequency irradiation emitted from cellular phones on 1) trace elements such as manganese, iron, copper, zinc, 2) T1 relaxation times in serum, and 3) rectal temperature of rats.
| Exposure | Parameters |
|---|---|
|
Exposure 1:
890–915 MHz
Modulation type:
pulsed
Exposure duration:
repeated daily exposure, 20 min/day, 7 days a week for 1 month
|
|
16 rats were divided into equally into exposure and sham exposure group.
| Frequency | 890–915 MHz |
|---|---|
| Exposure duration | repeated daily exposure, 20 min/day, 7 days a week for 1 month |
| Modulation type | pulsed |
|---|---|
| Repetition frequency | 217 Hz |
| Exposure source | |
|---|---|
| Distance between exposed object and exposure source | 0.005 m |
| Chamber | Plexiglas cages (20 cm x 10.5 cm x 10 cm) with ventilation holes |
| Setup | Rats were confined in the cages with the mobile phones placed 0.5 cm under the cages |
| Measurand | Value | Type | Method | Mass | Remarks |
|---|---|---|---|---|---|
| electric field strength | 13.59 V/m | mean | measured | - | - |
| power density | 47 µW/cm² | mean | measured | - | - |
| SAR | 290 µW/g | mean | measured | whole body | to 870 µW/g |
T1 relaxation time and the concentrations of iron and copper in the serum of the exposed group were not changed compared to the control group. However, manganese and zinc values of the exposed animals were significantly different from the control animals. The difference in rectal temperature measured before and after irradiation in the exposed animals was not statistically different from control.
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