Burch J B, Reif J S, Yost M G
Department of Environmental Health, Colorado State University, Fort Collins 80523, USA.
Neurosci Lett. 1999 May 14;266(3):209-12. doi: 10.1016/s0304-3940(99)00308-0.
The effects of geomagnetic disturbances on urinary excretion of the melatonin metabolite, 6-hydroxymelatonin sulfate (6-OHMS), were studied in conjunction with 60 Hz magnetic field (MF) and ambient light exposure in 132 electric utility workers. Geomagnetic activity was assessed using a local (equivalent amplitude or A(K), Boulder, CO) and global (average antipodal or aa) index. Personal exposures to 60 Hz MFs and light were obtained using data-logging meters. The relationship between geomagnetic activity and 6-OHMS was assessed with adjustment for age, light exposure, and month of participation. Mean overnight 6-OHMS excretion was lower on days when the 36-h A(K) or aa values exceeded 30 nT. A greater reduction in 6-OHMS excretion was observed when increased geomagnetic activity was combined with elevated 60 Hz MF or reduced ambient light exposures.
在132名电力公司工作人员中，结合60赫兹磁场（MF）和环境光照暴露，研究了地磁干扰对褪黑素代谢物硫酸6-羟基褪黑素（6-OHMS）尿排泄的影响。使用当地（等效振幅或A(K)，科罗拉多州博尔德）和全球（平均对映体或aa）指数评估地磁活动。使用数据记录仪获取个人对60赫兹MF和光照的暴露情况。在调整年龄、光照暴露和参与月份后，评估地磁活动与6-OHMS之间的关系。当36小时A(K)或aa值超过30纳特斯拉时，夜间6-OHMS平均排泄量较低。当地磁活动增加与60赫兹MF升高或环境光照暴露减少相结合时，观察到6-OHMS排泄量有更大程度的降低。
