The rats (24 per group) were exposed daily until they were 8 weeks old. At this point six rats of each group were examined histologically to determine possible changes in brainmorphology. The remaining 18 rats per group went through a battery of behavioral tests over 4 further weeks.
The exposure system used earlier [Heikkinen et al., 2006] was modified so that it consisted of only three chambers for sham, low dose and high doseexposure. The chambers consisted of two parallel circular aluminium plates (152 cm in diameter and 15 cm apart) short-circuited at the edges with RF-absorbing material attached inside to reduce reflections.
Setup
Twenty-four rat cages made of polycarbonate were placed symmetrically around the antenna near the edge of each chamber. The rats could move freely in their cages. Only eight rats (one rat in every third cage) were placed in each chamber, and cylindrical homogeneous flask phantoms (110 ml) were placed in the empty cages.
Heikkinen P et al.
(2006):
No effects of radiofrequency radiation on 3-chloro-4-(dichloromethyl)-5-hydroxy-2(5H)-furanone-induced tumorigenesis in female Wistar rats
Finnish Research Programme HERMO (Health Risk Assessment of Mobile Communications), Finland
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