Asashima M, Shimada K, Pfeiffer C J
Department of Biology, Yokohama City University, Japan.
Bioelectromagnetics. 1991;12(4):215-24. doi: 10.1002/bem.2250120403.
Developing larvae of the Japanese newt, Cynops pyrrhogaster, were subjected for 5 days to a shielded environment in which the static magnetic field was about 10,000 times weaker (5 nT) than the geomagnetic norm, which ranges between 30 and 60 microT at the earth's surface. Larvae from non-cleavage to neurula stages were exposed under shielded or normal (control) conditions and then examined for evidence of developmental abnormalities either 1 day or 20 days after treatment. The magnetic shielding was associated with an increased incidence of somatic defects, especially in larvae that were examined 20 days after shielding. Bi-headedness and intestinal protrusion were observed in magnetically shielded larvae but not in controls. Other abnormalities more frequently observed in shielded larvae were spinal curvature, malformed eyes, and retarded or blocked development. These data are among the first to illustrate the effects of magnetic-field deprivation on a developing animal.
日本蝾螈（Cynops pyrrhogaster）的发育幼虫在屏蔽环境中放置5天，该环境中的静磁场比地磁场标准弱约10000倍（5纳特斯拉），地球表面地磁场标准在30至60微特斯拉之间。处于未分裂期至神经胚期的幼虫在屏蔽或正常（对照）条件下暴露，然后在处理后1天或20天检查发育异常的证据。磁屏蔽与躯体缺陷发生率增加有关，尤其是在屏蔽后20天检查的幼虫中。在磁屏蔽幼虫中观察到双头和肠突出，但在对照中未观察到。在屏蔽幼虫中更频繁观察到的其他异常包括脊柱弯曲、眼睛畸形以及发育迟缓或受阻。这些数据是最早说明磁场剥夺对发育中动物影响的一批数据。
