この研究は、ラットの精子パラメータおよび全抗酸化能力に対する携帯電話の電波の影響について、ばく露時間および周波数を変えて調べた。成獣Wister雄ラット28匹を7匹ずつの4群に分けた：対照群、915MHz信号への2週間ばく露群、915MHz信号への3週間ばく露群、950MHz信号への2週間ばく露群。915MHz信号は、搬送波915MHzを217Hzでパルス変調したもの、950MHz信号は、搬送波950MHz、変調は同じである。ばく露は、半径15cmのパイレックスガラスの円筒内に半径5cmの円筒を中心を一致して配置し、大小円筒の間の空間に7匹のラットを一緒に入れて、内側円筒の内部にモノポールアンテナを置いて行った。ばく露空間の電力密度測定値は平均1.60 mW/cm2と述べている。その結果、ばく露した3つの群ではいずれも、対照群に比べ、精子の生存率・運動率・全抗酸化能力が有意に低下した；ばく露期間が2週間から3週間に延びると、精子の生存率・運動率は有意に低下した、と報告している。
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To investigate the effects of microwaves emitted by cell phones on sperms and total antioxidant capacity in rats.
Four groups were examined (n=7 per group): 1.) control group, 2.) exposure to 915 MHz-microwaves for 14 days, 3.) exposure to 915 MHz-microwaves for 21 days and 4.) exposure to 950 MHz-microwaves for 14 days.
| ばく露 | パラメータ |
|---|---|
|
ばく露1:
915 MHz
Modulation type:
AM, pulsed
ばく露時間:
8 hours a day for 14 consecutive days
|
|
|
ばく露2:
915 MHz
Modulation type:
AM, pulsed
ばく露時間:
8 hours a day for 21 consecutive days
|
|
|
ばく露3:
950 MHz
Modulation type:
AM, pulsed
ばく露時間:
8 hours a day for 14 consecutive days
|
|
1.) 915 MHz for 14 days 2.) 915 MHz for 21 days 3.) 950 MHz for 14 days
| 周波数 | 915 MHz |
|---|---|
| タイプ |
|
| ばく露時間 | 8 hours a day for 14 consecutive days |
| Additional information | simulated cell phone receiver waves |
| Modulation type | AM, pulsed |
|---|---|
| Modulation frequency | 200 kHz |
| Repetition frequency | 217 Hz |
| ばく露の発生源／構造 |
|
|---|---|
| チャンバの詳細 | rats were exposed in a Plexiglas cylinder that consisted of an internal (radius 5 cm, height 30 cm) and an external (radius 15 cm, height 30 cm) cylinder, rats were placed in the space between the two cylinders, antenna was placed vertically in the internal cylinder |
| Additional information | distance between measurement device and exposed object: 5, 10 or 15 cm |
| 測定量 | 値 | 種別 | Method | Mass | 備考 |
|---|---|---|---|---|---|
| 電力密度 | 1.6 mW/cm² | mean | 測定値 | - | - |
| 周波数 | 915 MHz |
|---|---|
| タイプ |
|
| ばく露時間 | 8 hours a day for 21 consecutive days |
| Additional information | simulated cell phone receiver waves |
| Modulation type | AM, pulsed |
|---|---|
| Modulation frequency | 200 kHz |
| Repetition frequency | 217 Hz |
| ばく露の発生源／構造 |
|
|---|
| 測定量 | 値 | 種別 | Method | Mass | 備考 |
|---|---|---|---|---|---|
| 電力密度 | 1.6 mW/cm² | mean | 測定値 | - | - |
| 周波数 | 950 MHz |
|---|---|
| タイプ |
|
| ばく露時間 | 8 hours a day for 14 consecutive days |
| Additional information | simulated cell phone antenna waves |
| Modulation type | AM, pulsed |
|---|---|
| Modulation frequency | 200 kHz |
| Repetition frequency | 217 Hz |
| ばく露の発生源／構造 |
|
|---|
| 測定量 | 値 | 種別 | Method | Mass | 備考 |
|---|---|---|---|---|---|
| 電力密度 | 1.6 mW/cm² | mean | 測定値 | - | - |
No differences were found between the groups regarding the number and morphology of sperms. The sperm viability, the sperm motility and the sperm antioxidative capacity were significantly decreased in all exposure groups (group 2, 3 and 4) compared to the control group. Furthermore, in group 3 (exposure for 21 days) the sperm viability and the sperm motility were additionally significantly decreased compared to group 2 (exposure for 14 days).
(remark EMF-Portal: No results are presented for antioxidative capacity in the blood plasma.)
The authors conclude that exposure to microwaves emitted by cell phones could decrease the sperm viability, sperm motility and sperm antioxidative capacity in rats.
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