täglich wiederholte Exposition (nicht angegeben) für 2 Wochen
A wooden cage of 40 cm x 40 cm x 30 cm was used with a stainless steel ground plane of 1 m x 0.5 m placed under it.
A monopole magnet whip antenna, about 30 cm high, was positioned vertically at half length of one side of the cage. The transmitter was a commercial CB hand-held portable transceiver of 4 W, 40 channels.
The rats were allocated to three groups: control, RF exposed, and RF exposed plus melatonin treated. The latter group received an i.p. injection of 4 mg/kg melatonin in ethanol (5%) in physiological saline (0.1 ml/100 g) daily after RF exposure. The others were injected with the vehicle only. Remark: It is not clear, why the authors talk about magnetic fields, instead of electromagnetic fields.
The exposure was always over the recommended limit of 0.2 mW/cm² for 6 min. It seems that E1 and E2 are the maximum and minimum values measured within the cage.
Mess- und Berechnungsdetails
The RF power of the first channel was measured on a dummy load of 50 Ω connected to the antenna connector. The channel frequency was measured using a counter. Calibration measurements were performed at 38 target points within the cage using an SWR meter, a spectrum analyser, and a loop probe antenna. Results were averaged to obtain the power density for the cage.