...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >Low Bioavailability of Silver Nanoparticles Presents Trophic Toxicity to Marine Medaka (Oryzias melastigma)
【24h】

Low Bioavailability of Silver Nanoparticles Presents Trophic Toxicity to Marine Medaka (Oryzias melastigma)

机译：银纳米颗粒的低生物利用度对海洋Medaka（Oryzias melastigma）具有营养毒性。

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

Concerns for the potential risks of silver nanoparticles (AgNPs) to aquatic organisms have increased. The present study investigated the trophic transfer of AgNPs from brine shrimp (Artemia salina) nauplii to marine medaka. We found that the aggregated AgNPs (20 and 80 nm) and well dispersed 80-nm AgNPs (stabilized by 20 μM Tween 20) could be readily accumulated by brine shrimp, while far less well-dispersed 20-nm AgNPs were accumulated. The assimilation efficiency (AE) of AgNPs in medaka fed AgNPs-contaminated brine shrimp was low (＜6%), resulting in a low trophic transfer efficiency (0.01-0.04) after 28 days of chronic dietary exposure. However, such low bioavailability of dietary AgNPs could inhibit the whole-body Na~+/ K~+-ATPase and superoxide dismutase (SOD) activity in the fish within the first 2 weeks of exposure. Significant (p ＜ 0.05, two-way ANOVA) inhibition occurred in the high AgNPs-contaminated brine shrimp treatment over 28 days of chronic exposure. Furthermore, reduced growth and water content percentage were also observed in fish fed high dosages of AgNPs-contaminated brine shrimp. Our study highlighted the potential of trophically available AgNPs in bringing toxicity to the marine fish.
机译：人们越来越担心银纳米颗粒（AgNP）对水生生物的潜在风险。本研究调查了AgNPs从卤水虾（无卤）到海的营养转移。我们发现聚集的AgNPs（20和80 nm）和分散良好的80 nm AgNPs（被20μMTween 20稳定）可以很容易地被盐水虾聚集，而分散得不太好的20 nm AgNPs。饲喂高加仑AgNPs的盐水虾中AgNPs的同化效率低（＜6％），导致慢性饮食暴露28天后营养传递效率低（0.01-0.04）。然而，如此低的日粮AgNPs生物利用度可能会在暴露的前两周内抑制鱼体内的全身Na〜+ / K〜+ -ATPase和超氧化物歧化酶（SOD）活性。长期暴露28天后，在高度被AgNPs污染的盐水虾处理中，发生了显着（p ＜0.05，双向ANOVA）抑制作用。此外，在喂食高剂量被AgNPs污染的盐水虾的鱼中，也观察到生长和水分含量降低。我们的研究强调了营养上可用的AgNP在给海洋鱼类带来毒性方面的潜力。

著录项

  • 来源
    《Environmental Science & Technology》 |2014年第14期|8152-8161|共10页
  • 作者

    Jian Wang; Wen-Xiong Wang;

  • 作者单位

    Division of Life Science, State Key Laboratory of Marine Pollution, Hong Kong University of Science and Technology (HKUST), Clearwater Bay, Kowloon, Hong Kong, China;

    Division of Life Science, State Key Laboratory of Marine Pollution, Hong Kong University of Science and Technology (HKUST), Clearwater Bay, Kowloon, Hong Kong, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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