polycarbonate ventilated cages (45 cm x 20 cm x 35 cm, L x W x H) with room temperature of 22-25°C and relative humidity of 45-55%
Aufbau
exposure system consisted of an exposure device and a plastic rack, both made of acrylonitrile butadiene styrene plastic; the exposure device had five layers (200 cm x 100 cm x 200 cm, L x W x H) with a layer-to-layer distance of 35 cm; inside the exposure device, a plastic rack (140 cm x 70 cm x 200 cm, L x W x H) with four floors was placed; 24 plastic cages with 2-3 rats each were placed inside the system; bronze wires generated the uniform magnetic field; the wiring ratio of the five coils was 2:1:1:1:2 and the 3% uniformity area of each floor was 150 cm x 50 cm (L x W) and over the whole rack, uniformity was 5.2%; sound and temperature from the exposure system were close to those in the environment; exposure room was lacking other electric devices, e.g., computers and daylight lamps were kept far away from the system
currents in coils were in opposite directions in sham exposure system; exposure and sham exposure systems were located in separated and non-adjacent rooms with similar conditions
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