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首页> 外文期刊>Environmental toxicology and chemistry >EFFECT OF TITANIUM DIOXIDE NANOMATERIALS AND ULTRAVIOLET LIGHT COEXPOSURE ON AFRICAN CLAWED FROGS (XENOPUS LAEVIS)
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EFFECT OF TITANIUM DIOXIDE NANOMATERIALS AND ULTRAVIOLET LIGHT COEXPOSURE ON AFRICAN CLAWED FROGS (XENOPUS LAEVIS)

机译：二氧化钛纳米材料和紫外光共暴露对非洲包埋的草（Xenopus laevis）的影响

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摘要

Titanium dioxide nanomaterials (nano-TiO_2) exhibit stronger photochemical oxidation/reduction capacity compared with their bulk counterparts, but the effectiveness of nano-TiO_2 interaction with ultraviolet (UV) light strongly depends on particle size. In this study, the dependence of nano-TiO_2 toxicity on particle size and interaction with UV light were investigated. Toxicity tests with Xenopus laevis included eight concentrations of nano-TiO_2 in the presence of either white light or UVA (315-400 nm). We quantified viability and growth of Xenopus laevis. Results showed that, regardless of UV light exposure, increasing TiO_2 concentration decreased X. laevis survival (p < 0.05). Coexposure to 5-nm TiO_2 and UVA caused near-significant decreases in X. laevis survival (p = 0.08). Coexposure to 10-nm TiO_2 and UVA significantly decreased X. laevis survival (p = 0.005). However, coexposure to 32-nm TiO_2 and UVA had no statistical effect on X. laevis survival (p = 0.8). For all three particle sizes, whether alone or with UV light, the nano-TiO_2 concentrations significantly affected growth of tadpole's as determined by total body length, snout-vent length, and developmental stage. High-concentration TiO_2 solutions suppressed tadpole body length and delayed developmental stages. Further research to explore reasons for the growth and mortality in tadpoles is still underway in our laboratory. Given the widespread application of nano-TiO_2, our results may be useful in the management of nano-TiO_2 released from industrial, municipal, and nonpoint sources.
机译：二氧化钛纳米材料（nano-TiO_2）与大量的同类材料相比具有更强的光化学氧化/还原能力，但纳米TiO_2与紫外线（UV）相互作用的有效性很大程度上取决于颗粒尺寸。在这项研究中，研究了纳米TiO_2毒性对颗粒大小和与紫外光相互作用的依赖性。用爪蟾的毒性测试包括在白光或UVA（315-400 nm）存在下八种浓度的纳米TiO_2。我们量化了非洲爪蟾的生存能力和生长。结果表明，无论紫外线照射如何，增加TiO_2的浓度都会降低X.laevis的存活率（p <0.05）。共同暴露于5nm TiO_2和UVA会导致X.laevis存活率显着降低（p = 0.08）。共暴露于10-nm TiO_2和UVA会显着降低X.laevis的存活率（p = 0.005）。然而，共同暴露于32-nm TiO_2和UVA对X.laevis的存活率无统计学影响（p = 0.8）。对于三种粒径，无论是单独使用还是用紫外线照射，纳米TiO_2的浓度均会显着影响of的生长，这取决于by体的总长度，口鼻部长度和发育阶段。高浓度TiO_2溶液抑制了body的体长并延迟了发育阶段。探索our生长和死亡原因的进一步研究仍在我们的实验室中进行。鉴于纳米TiO_2的广泛应用，我们的结果可能对管理从工业，市政和非点源排放的纳米TiO_2有用。

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  • 来源
    《Environmental toxicology and chemistry》 |2012年第1期|p.176-183|共8页
  • 作者

    Junling Zhang; Mlke Wages; Stephen B. Cox; Jonathan D. Maul; Yujia Li; Melane Barnes; Louisa Hope-Weeks; George P. Cobb;

  • 作者单位

    Department of Environmental Toxicology, Texas Tech University, Lubbock, Texas, USA;

    Department of Environmental Toxicology, Texas Tech University, Lubbock, Texas, USA;

    Department of Environmental Toxicology, Texas Tech University, Lubbock, Texas, USA;

    Department of Environmental Toxicology, Texas Tech University, Lubbock, Texas, USA;

    Department of Geoscience, Texas Tech University, Lubbock, Texas, USA;

    Department of Geoscience, Texas Tech University, Lubbock, Texas, USA;

    Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas, USA;

    Department of Environmental Toxicology, Texas Tech University, Lubbock, Texas, USA;

  • 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

    nanotoxicity; FETAX; amphibian; titanium dioxide; ultraviolet light;

    机译：纳米毒性FETAX;两栖动物二氧化钛;紫外光线;

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