To investigate the effects of a pulsed 150-MHz exposure on spore germination of the fungus Mycotypha africana.
Depending upon an appropriate carbon nutrition source the fungus M. africana grows as a mycelium (M-culture) or in a yeast-like form (Y-culture).
| Exposure | Parameters |
|---|---|
|
Exposure 1:
150 MHz
Exposure duration:
continuous for 5 h
|
|
|
Exposure 2:
150 MHz
Exposure duration:
continuous for 24 h
|
|
| Frequency | 150 MHz |
|---|---|
| Exposure duration | continuous for 5 h |
| Exposure source |
|
|---|---|
| Distance between exposed object and exposure source | 0.006 m |
| Setup | Petri dishes were placed on the top of the coil at a constant temperature of 21°C. |
| Additional info | Control dishes were kept in the same room at 3.5 m away from the coil where no magnetic field was detected. |
| Measurand | Value | Type | Method | Mass | Remarks |
|---|---|---|---|---|---|
| power | 200 µW | - | cf. remarks | - | 101 mW |
| electric field strength | 3 mV/m | minimum | cf. remarks | - | 500 mV/cm |
| Frequency | 150 MHz |
|---|---|
| Exposure duration | continuous for 24 h |
| Measurand | Value | Type | Method | Mass | Remarks |
|---|---|---|---|---|---|
| power | 200 µW | - | cf. remarks | - | 101 mW |
| electric field strength | 3 mV/m | minimum | cf. remarks | - | 500 mV/cm |
5 h and 24 h exposure of Y-cultures led to the same effects. At low intensity levels an 2 to 3 fold increased germination rate was observed, whereas a mid intensity level decreased it up to a factor of 4.
M-cultures exhibited the same germination pattern for a 5 h exposure but no effect was found for a 24 h exposure.
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