この研究は、高周波電磁界がメラトニン合成に影響を与えるか否かを実験で調べた。ばく露に用いた900MHz電磁界は、連続波および217 Hzパルス変調波で、電力密度は0.1〜0.6mW / cm2であった。SARは、ラットでは約0.06〜0.36W / kg、ジャンガリアンハムスターでは0.04W / kgとなった。ばく露は、昼または夜に15分間~6時間行なった。その結果、いずれのばく露条件においても、オスおよびメスの、Sprague-Dawleyラットおよびジャンガリアンハムスターの、松果体メラトニン合成に明らかな短期的影響はなかった；松果体細胞のシナプスリボン数（ラットのみで測定）も同様に影響を受けなかった、と報告している。
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To study whether short-term exposure to electromagnetic fields of 900 MHz has demonstrable effects on the pineal gland.
| ばく露 | パラメータ |
|---|---|
|
ばく露1:
900 MHz
Modulation type:
CW
ばく露時間:
continuous for 15, 30, or 60 min
|
|
|
ばく露2:
900 MHz
Modulation type:
pulsed
|
|
|
ばく露3:
900 MHz
Modulation type:
pulsed
ばく露時間:
continuous for 6 h
|
|
|
ばく露4:
900 MHz
Modulation type:
pulsed
ばく露時間:
continuous for 90 min
|
| 周波数 | 900 MHz |
|---|---|
| タイプ |
|
| 偏波 |
|
| ばく露時間 | continuous for 15, 30, or 60 min |
| Modulation type | CW |
|---|
| ばく露の発生源／構造 |
|
|---|---|
| Distance between exposed object and exposure source | 385 mm |
| チャンバの詳細 | The ventilated exposure box, made of plywood and covered with a hood, was completely shielded on the outside with an 0.1-mm aluminium foil and covered on the inside with flat absorber material. The box consisted of two compartments separated by a glass plate. The lower one contained the antenna, and the upper one received the polystyrene cage of 0.37 x 0.24 x 0.175 cm with three animals inside. |
| ばく露装置の詳細 | The antenna in the first box produced a left-hand polarized field in the main radiation direction, i.e., the antenna axis. For simultaneous and sham exposure, an additional exposure box with a right-hand polarized antenna was used. The boxes were randomly selected for real and sham exposures. |
| Sham exposure | A sham exposure was conducted. |
| Additional information | In the first 12 experiments, real and sham exposures had to be carried out sequentially since only one box was available. In the following experiments (13-26), real and sham exposures were carried out simultaneously. |
| Modulation type | pulsed |
|---|---|
| Repetition frequency | 217 Hz |
| Additional information |
GSM standard |
| ばく露の発生源／構造 |
|
|---|---|
| Sham exposure | A sham exposure was conducted. |
| 周波数 | 900 MHz |
|---|---|
| タイプ |
|
| 偏波 |
|
| ばく露時間 | continuous for 6 h |
| Modulation type | pulsed |
|---|---|
| Repetition frequency | 217 Hz |
| Additional information |
GSM standard |
| ばく露の発生源／構造 |
|
|---|---|
| Sham exposure | A sham exposure was conducted. |
| 周波数 | 900 MHz |
|---|---|
| タイプ |
|
| 偏波 |
|
| ばく露時間 | continuous for 90 min |
| Modulation type | pulsed |
|---|---|
| Repetition frequency | 217 Hz |
| Additional information |
GSM standard |
| ばく露の発生源／構造 |
|
|---|---|
| Sham exposure | A sham exposure was conducted. |
Both continuous and/or pulsed microwaves at day or night had no notable short-term effect on pineal melatonin synthesis in Sprague-Dawley rats and Djungarian hamsters. Pineal synaptic ribbon profile numbers were likewise not affected.
The 900 MHz electromagnetic fields, unpulsed or pulsed, have no short-term effect on the mammalian pineal gland.
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