• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Bioelectromagnetics. >Magnetic fields produced by hand held hair dryers, stereo headsets, home sewing machines, and electric clocks.
【24h】

Magnetic fields produced by hand held hair dryers, stereo headsets, home sewing machines, and electric clocks.

机译：手持式吹风机，立体声耳机，家用缝纫机和电子钟产生的磁场。

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A recent epidemiologic study reported associations between leukemia risk in children and their personal use of television (TV) sets, hair dryers, and stereo headsets, and the prenatal use by their mothers of sewing machines. To provide exposure data to aid in the interpretation of these findings, extremely and very low frequency (ELF and VLF) magnetic fields produced by a sample of each type of appliance were characterized in a field study of volunteers conducted in Washington DC and its Maryland suburbs. Questionnaire data regarding children's or mothers' patterns of usage of each type of appliance were also collected. ELF magnetic fields measured 10 cm from the nozzles of hair dryers were elevated over the ambient by a mean factor of 17 when these devices were in use. Fields near headsets being used to listen to music were not distinguishable from ambient levels except at frequencies below and well above 60 Hz and, even then, field levels were < 0.01 microT. Home sewing machines produced ELF magnetic fields that were elevated by a factor of 2.8 over ambient levels at the front surfaces of the lower abdomens of mothers. Estimated mean daily times of usage of hair dryers, stereo headsets, and sewing machines were 2.6, 19, and 17 minutes, respectively. These data and previously published data on TV sets, do not provide a consistent picture of increased (or decreased) leukemia risk in relation to increasing peak or time weighted average (TWA) ELF magnetic field exposure. The data could, however, conceivably be compatible with some more complex biophysical model with unknown properties. Overall, the results of this study provide little evidence supporting the hypothesis that peak or TWA ELF magnetic fields produced by appliances are causally related to the risk of childhood leukemia in children. Copyright 2002 Wiley-Liss, Inc.
机译：最近的一项流行病学研究报告说，儿童患白血病的风险与他们个人使用电视机，吹风机和立体声耳机之间的关联以及其缝纫机母亲的产前使用之间存在关联。为了提供暴露数据以帮助解释这些发现，在华盛顿特区及其马里兰郊区进行的志愿者现场研究中，对每种类型的设备的样品产生的极低频磁场（ELF和VLF）进行了表征。 。还收集了有关儿童或母亲使用每种器具的方式的问卷调查数据。使用这些设备时，距离吹风机喷嘴10厘米处测量的ELF磁场在整个环境中升高了17倍。除了在低于和高于60 Hz的频率下，用于听音乐的头戴式耳机附近的磁场与周围环境水平没有区别，即使在那时，磁场水平也小于0.01 microT。家用缝纫机产生的ELF磁场在母亲小腹前表面的环境水平上升高了2.8倍。估计平均每天使用吹风机，立体声耳机和​​缝纫机的时间分别为2.6、19和17分钟。这些数据和以前在电视机上发布的数据不能提供与峰值或时间加权平均（TWA）ELF磁场暴露增加有关的白血病风险增加（或减少）的一致描述。但是，该数据可能与某些特性未知的更复杂的生物物理模型兼容。总体而言，这项研究的结果几乎没有证据支持以下假说，即器具产生的峰值或TWA ELF磁场与儿童患儿童白血病的风险有因果关系。版权所有2002 Wiley-Liss，Inc.

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：[email protected]

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号

OSZAR »