ENVR 97 |
| The present study examined the effects of copper nanoparticles (50-100nm) and ionic Cu2+ on the development of zebrafish embryos. The embryos were exposed to copper nanoparticle suspensions (0.01, 0.1, 1 or 10 mg/L) and the Cu2+ solutions of the same molarity, resepectively. The mortality, hatching rate and abnormalities of larvae were investigated at 24, 48, 72, 96, 120, 144 and 192 h post-fertilization. Results indicated that copper nanoparticles of low concentraion (<0.1mg/L) only affected the 48h hatching rate. However, higher concentrations (1.0 and 10 mg/L) of copper nanoparticles significantly reduced the hatching rate at all time points. Cu2+ showed stronger effects than that of the nanoparticles. Abnormalities of larvae were found in both cases. The solubility of copper nanoparticles in water seems not to be the only reason of the toxicity to the development of zebrafish embryos. |
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Environmental Behavior and Fate of Manufactured Nanomaterials
8:30 AM-12:15 PM, Tuesday, April 8, 2008 Morial Convention Center -- Rm. 235, Oral
Division of Environmental Chemistry |