...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental toxicology and chemistry >CHRONIC TOXICITY OF 2,4,2',4'-TETRABROMODIPHENYL ETHER ON THE MARINE ALGA SKELETONEMA COSTATUM AND THE CRUSTACEAN DAPHNIA MAGNA
【24h】

CHRONIC TOXICITY OF 2,4,2',4'-TETRABROMODIPHENYL ETHER ON THE MARINE ALGA SKELETONEMA COSTATUM AND THE CRUSTACEAN DAPHNIA MAGNA

机译：2,4,2'，4'-四溴二苯醚对海洋藻类藻类和甲壳类蚤的慢性毒性

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

Polybrominated diphenyl ethers form a group of highly hydrophobic and persistent chemicals that are detected in various environmental matrices, such as soil, water, sediments, and biota. Although a variety of biological effects have been documented in vertebrates, the effects in invertebrates seem to be largely unknown. The objective of the present study was to determine the toxic effects of 2,4,2',4'-tetrabromodiphenyl ether (BDE 47) on the growth of the marine diatom Skeletonema costatum and on the parthogenetic reproduction and filtering activity of the freshwater crustacean Daphnia magna. The results showed that BDE 47 caused growth inhibition in S. costatum (no-observed-effect concentration [NOEC], 6.6 μg/L; median effect concentration, 70 μg/L; 95% confidence interval, 64-77 μg/L) and depressed the reproductive output of D. magna (NOEC, 14 μg/L). No effects were seen on the filtering rate of D. magna at any of the concentrations tested. Although sublethal toxicity was observed at low-μg/L levels, documented environmental water concentrations are many orders of magnitude lower, thus suggesting that BDE 47 is of minor risk to these organisms through direct water exposure.
机译：多溴联苯醚形成一组高度疏水和持久的化学物质，可在各种环境基质（例如土壤，水，沉积物和生物区系）中检测到。尽管已在脊椎动物中记录了多种生物学效应，但在无脊椎动物中的效应似乎很大程度上未知。本研究的目的是确定2,4,2'，4'-四溴二苯醚（BDE 47）对海洋硅藻骨架骨骼生长以及淡水甲壳类动物的单基因繁殖和过滤活性的毒性作用水蚤。结果表明，BDE 47引起了南美白对虾的生长抑制（未观察到的作用浓度[NOEC]为6.6μg/ L；中间作用浓度为70μg/ L； 95％置信区间为64-77μg/ L）并降低了D. magna（NOEC，14μg/ L）的生殖能力。在任何测试浓度下，均未观察到对D. magna过滤速度的影响。尽管在低μg/ L的水平下观察到了亚致死毒性，但已记录的环境水浓度却低了多个数量级，因此表明BDE 47通过直接暴露于水对这些生物体的危害较小。

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：kefu@zhangqiaokeyan.com

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