研究のタイプ: 医学/生物学の研究 (experimental study)

[携帯電話からの900 MHzと1800 MHzの電磁界はラットの血液中のメラトニン分泌には影響はない] med./bio.

No effects of 900 MHz and 1800 MHz electromagnetic field emitted from cellular phone on nocturnal serum melatonin levels in rats.

掲載誌: Toxicol Ind Health 2005; 21 (1-2): 27-31

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研究目的(著者による)

To study the effects of exposure to a 900 MHz and 1800 MHz electromagnetic field on serum nocturnal melatonin levels of adult male rats.

影響評価項目

ばく露

ばく露 パラメータ
ばく露1: 900 MHz
Modulation type: CW
ばく露時間: repeated daily exposure, 30 min/day, 5 days/week for 4 weeks
ばく露2: 1,800 MHz
Modulation type: CW
ばく露時間: repeated daily exposure, 30 min/day, 5 days/week for 4 weeks

ばく露1

主たる特性
周波数 900 MHz
タイプ
  • electromagnetic field
ばく露時間 repeated daily exposure, 30 min/day, 5 days/week for 4 weeks
Modulation
Modulation type CW
ばく露装置
ばく露の発生源/構造
チャンバの詳細 The exposure system consisted of a ventilated round plastic tube cage (12 cm long, 5.5 cm in diameter) and a half-wave dipole antenna.
ばく露装置の詳細 The rat was positioned above the dipole antenna with a small distance to it.
Sham exposure A sham exposure was conducted.
パラメータ
測定量 種別 Method Mass 備考
電力密度 1 mW/cm² mean 測定値 - ± 0.4 mW/cm²
SAR 2 W/kg peak - - -

ばく露2

主たる特性
周波数 1,800 MHz
タイプ
  • electromagnetic field
ばく露時間 repeated daily exposure, 30 min/day, 5 days/week for 4 weeks
Modulation
Modulation type CW
ばく露装置
ばく露の発生源/構造
  • E1と同じ装置
Sham exposure A sham exposure was conducted.
パラメータ
測定量 種別 Method Mass 備考
電力密度 1 mW/cm² mean 測定値 - ± 0.4 mW/cm²
SAR 2 W/kg peak - - -

ばく露を受けた生物:

方法 影響評価項目/測定パラメータ/方法

研究対象とした生物試料:
研究対象とした臓器系:
調査の時期:
  • ばく露後

研究の主なアウトカム(著者による)

There were no statistically significant differences in melatonin concentrations between the 900 MHz electromagnetic field exposed group and the sham-exposed group. Also, there were no statistically significant differences in melatonin concentrations between the sham-exposed group and the 1800 MHz-exposed group.
These findings indicate that mobile phones, emitting 900 and 1800 MHz electromagnetic fields, have no effect on nocturnal serum melatonin levels in rats.

研究の種別:

研究助成

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