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

[ニワトリ胚発生に対する弱いパルス磁界の影響] med./bio.

Effects of weak pulsed magnetic fields on chick embryogenesis.

掲載誌: Selected Papers from the International Scientific Conference on Works with Display Units: Stockholm, Schweden, May 12-15, 1986 Elsevier, 1987: 135-140, ISBN 9780444701718

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研究目的(著者による)

To study whether magnetic fields with a asymmetrical sawtooth waveform could influence the early development of chick embryos.

詳細情報

285 fertilized eggs were divided into the exposure group (n=149) and control group (n=136). Exposure eggs were exposed to three different magnetic flux densities (0.1, 1.5 and 16 µT) during the first two days of development.

影響評価項目

ばく露

ばく露 パラメータ
ばく露1: 20 kHz
Modulation type: pulsed
ばく露時間: continuous for 42 h
ばく露2: 20 kHz
Modulation type: pulsed
ばく露時間: continuous for 42 h
ばく露3: 20 kHz
Modulation type: pulsed
ばく露時間: continuous for 47 h

ばく露1

主たる特性
周波数 20 kHz
タイプ
  • magnetic field
波形
  • sawtooth-shaped
ばく露時間 continuous for 42 h
Modulation
Modulation type pulsed
Rise time 45 µs
Fall time 5 µs
Additional information

simulation of a visual display terminal

ばく露装置
ばく露の発生源/構造
ばく露装置の詳細 eight coils with a diameter of 6 cm, 8.3 cm long, made of 98 turns of 0.7 mm enamelled copper wire; coils connected in parallel; exposure system placed inside an incubator at a constant temperature of 38°C ± 0.2°C; each egg placed horizontally inside one coil; electric equipment placed half a meter from the incubator chamber and the fan was covered with magnetic shielding alloy to limit the 50 Hz background fields
Sham exposure A sham exposure was conducted.
パラメータ
測定量 種別 Method Mass 備考
磁束密度 0.1 µT - - - -
参照 - - - - dB/dt = 0.03 T/s

ばく露2

主たる特性
周波数 20 kHz
タイプ
  • magnetic field
波形
  • sawtooth-shaped
ばく露時間 continuous for 42 h
Modulation
Modulation type pulsed
Rise time 45 µs
Fall time 5 µs
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
磁束密度 1.5 µT - - - -
参照 - - - - dB/dt = 0.3 T/s

ばく露3

主たる特性
周波数 20 kHz
タイプ
  • magnetic field
波形
  • sawtooth-shaped
ばく露時間 continuous for 47 h
Modulation
Modulation type pulsed
Rise time 45 µs
Fall time 5 µs
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
磁束密度 16 µT - - - -
参照 - - - - dB/dt = 3.3 T/s

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)

No statistically significant differences between exposed and control embryos were observed with respect to developmental stage and malformations.

研究の種別:

研究助成

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