この研究は、ラットへの2450MHz（cw）マイクロ波の8時間連続ばく露の影響を、入射電力密度0、2および10mW / cm 2で調べた。結果として、血清サイロキシン（T4）およびトリヨードチロニン（T3）ならびにT3の取り込み、遊離チロキシン指数など、甲状腺軸機能は、どのばく露条件でも変化しなかった；副腎軸活性も、8時間のマイクロ波ばく露の影響を受けなかった；血清コルチコステロン濃度は、10mW / cm2群では7.8 μg/dl、0または2 mW / cm 2群では9.9 μg/dl、無処置群では7.0 μg/dlであった、と報告している。
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To study the endocrine effects of microwave exposure of rats.
Rats were exposed in vivo, and possible endocrine changes were investigated by determination of several endocrine hormones in blood samples. Investigations were carried out concerning the hormones thyroxine (T4), triiodothyronine (T3), and corticosterone. T4 and T3 are formed and secreted by the thyroid gland, whereas corticosterone is a adrenal cortex product.
|ばく露時間||continuous for 8 h|
|Distance between exposed object and exposure source||1.55 m|
|チャンバの詳細||chamber 2,5 m x 3,0 m x 2,5 m lined with HPY-18 microwave absorber( -45dB)|
|ばく露装置の詳細||animals placed in 2.5 cm thick Styrofoam cages (10 cm x 20 cm) positioned inside the chamber|
|Sham exposure||A sham exposure was conducted.|
The microwave exposure had no effects on the serum concentrations of thyroxine (T4), triiodothyronine (T3) and the uptake of T3. These unaltered hormone concentrations could be interpreted in that way that the thyroid gland was not affected by exposure. The serum concentrations of corticosterone, which is adrenal cortex made, were nonuniform. Low level exposure leads to increased concentration, whereas at high level exposure the corticosterone concentration was similar to the unexposed controles.
These results suggest that the experimental procedure effects the adrenal cortex, and that this effect could be counteracted by high level exposure.