Levin M, Ernst S G
Department of Biology, Tufts University, Medford, Massachusetts 02155, USA.
Bioelectromagnetics. 1995;16(4):231-40. doi: 10.1002/bem.2250160405.
This study demonstrates that exposure to 60 Hz magnetic fields (3.4-8.8 mT) and magnetic fields over the range DC-600 kHz (2.5-6.5 mT) can alter the early embryonic development of sea urchin embryos by inducing alterations in the timing of the cell cycle. Batches of fertilized eggs were exposed to the fields produced by a coil system. Samples of the continuous cultures were taken and scored for cell division. The times of both the first and second cell divisions were advanced by ELF AC fields and by static fields. The magnitude of the 60 Hz effect appears proportional to the field strength over the range tested. The relationship to field frequency was nonlinear and complex. For certain frequencies above the ELF range, the exposure resulted in a delay of the onset of mitosis. The advance of mitosis was also dependent on the duration of exposure and on the timing of exposure relative to fertilization.
本研究表明，暴露于60赫兹磁场（3.4 - 8.8毫特斯拉）以及直流至600千赫兹范围内的磁场（2.5 - 6.5毫特斯拉）会通过诱导细胞周期时间的改变来影响海胆胚胎的早期发育。将一批批受精卵暴露于线圈系统产生的磁场中。采集连续培养的样本并对细胞分裂进行评分。极低频交流磁场和静磁场均使第一次和第二次细胞分裂的时间提前。在测试范围内，60赫兹效应的强度似乎与场强成正比。与场频率的关系是非线性且复杂的。对于某些高于极低频范围的频率，暴露会导致有丝分裂开始延迟。有丝分裂的提前还取决于暴露持续时间以及相对于受精的暴露时间。
