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

[アメリカツノカエルのオタマジャクシの発育速度に対するカルシウムサイクロトロン共鳴の影響] med./bio.

Influence of Calcium Cyclotronic Resonance on the Developmental Rates of Xenopus Laevis Tadpoles

著者: Severini M, Giliberti C, Tarantino G, Loy M, Bonori M, Congiu Castellano A, Bedini A, Palomba R, Giuliani L
掲載誌: PIERS Proceedings, Beijing, China (2009). The Electromagnetics Academy, 2009: pp. 983-987; ISBN 978-1-934142-08-0
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研究目的（著者による）

To investigate the effects of 50 Hz magnetic fields combined with static magnetic fields on the development of tadpoles.

詳細情報

Former studies have found biological effects of particularly weak AC magnetic fields but with a frequency close to the cyclotron resonance frequency corresponding to the charge-to-mass ratio of a calcium ion and to the applied DC field (for example Zhadin et al. (1999), Lisi et al. (2006), Garardi et al. (2008)).
Two experiments were performed: experiment 1) 50 Hz magnetic field plus static magnetic field of 65 µT (n=68) and a control group without exposure (n=68) and experiment 2) 50 Hz magnetic field without artificial static magnetic field (only geomagnetic field) (n=68) and a control group without exposure (n=68). Both experiments were repeated three times, i.e., in total 408 tadpoles were used per condition.

影響評価項目

ばく露

ばく露 パラメータ
ばく露1: 0–50 Hz
ばく露時間: not reported, probably during the whole development
ばく露2: 50 Hz
ばく露時間: not reported, probably during the whole development

ばく露1

主たる特性
周波数 0–50 Hz
タイプ
  • magnetic field
波形
  • sinusoidal
ばく露時間 not reported, probably during the whole development
ばく露装置
ばく露の発生源／構造
チャンバの詳細 aquarium with 0.26 m height, 0.26 m width and 0.40 m length
ばく露装置の詳細 solenoid had a length of 1.60 m and a diameter of 0.38 m and was made of 1600 copper wire turns (diameter 0.001 m); static field was obtained by adding a DC component to the AC component of the current generator
パラメータ
測定量 値 種別 Method Mass 備考
磁束密度 65 µT - 測定値 - static field
磁束密度 100 µT - 測定値 - 50 Hz

ばく露2

主たる特性
周波数 50 Hz
タイプ
  • magnetic field
波形
  • sinusoidal
ばく露時間 not reported, probably during the whole development
ばく露装置
ばく露の発生源／構造
Additional information geomagnetic field was 25 µT
パラメータ
測定量 値 種別 Method Mass 備考
磁束密度 100 µT - 測定値 - -

Reference articles

  • Severini M et al. (2003): [アフリカ・ツメガエルのオタマジャクシの発達における間欠弱磁界の亜致死的影響]

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:
調査の時期:
  • ばく露中

研究の主なアウトカム（著者による）

In the first experiment, no significant differences were found between the exposed tadpoles (static magnetic field of 65 µT plus 50 Hz magnetic field) and the control ones. However, in the second experiment, a significant delay regarding the developmental stage was found in exposed tadpoles (geomagnetic field plus 50 Hz magnetic field) compared to those from the control group.
The authors conclude that the geomagnetic field could play an important role in the development of tadpoles when exposed to a 50 Hz magnetic field and further hypothesize a correlation to increased calcium ion energy levels.

研究の種別:

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