The first part of this publication is an experimental in vitro study about the possible effects on human blood lymphocytes caused by 954 MHz irradiation. The second part is an observational in vivo study. In this pilot experiment blood samples obtained from maintenance workers, occupationallly exposed to microwaves of several frequencies, were investigated.
| Exposure | Parameters |
|---|---|
|
Exposure 1:
954 MHz
Modulation type:
pulsed
Exposure duration:
continuous for 2 h
in vitro study
|
|
|
Exposure 2:
450–900 MHz
Modulation type:
pulsed
Exposure duration:
repeated daily exposure for at least 1 h/day for at least 1 year
in vivo study
|
- |
| Frequency | 954 MHz |
|---|---|
| Type | |
| Charakteristic | |
| Exposure duration | continuous for 2 h |
| Additional info | in vitro study |
| Exposure source | |
|---|---|
| Distance between exposed object and exposure source | 5 cm |
| Setup | Heparinized blood samples (10 ml) were aliquoted over three test tubes. Aliquot A was placed 5 cm from the emitting antenna in a cooled box at 17 ± 1 °C. Aliquot B was placed in a metallic box but the conditions were same as for A. Aliquot C served as control and was kept in another room away from the antenna. |
| Additional info | Three aliquots were made from each 10-ml blood sample: exposed, sham-exposed, and outside control. |
| Measurand | Value | Type | Method | Mass | Remarks |
|---|---|---|---|---|---|
| electric field strength | 49 V/m | unspecified | measured | - | 46-51 V/m |
| power density | 15 W/m² | unspecified | - | - | - |
| SAR | 1.5 W/kg | unspecified | calculated | - | - |
| Frequency | 450–900 MHz |
|---|---|
| Type | |
| Exposure duration | repeated daily exposure for at least 1 h/day for at least 1 year |
| Additional info | in vivo study |
| Additional info | and other frequencies |
| Modulation type | pulsed |
|---|
| Exposure source |
|
|---|---|
| Setup | Investigation on a limited sample of six workers occupationally exposed. |
| Additional info | A control sample of six healthy men was selected for comparable age and life-style. |
No parameters are specified for this exposure.
In conclusion, the present investigation failed to demonstrate any important cytogenetic damage in in vivo exposed subjects. Some cytogenetic effects were observed in in vitro exposed blood samples but only very close to the antenna.
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