| Literature DB >> 21333422 |
Jiyan Shi1, Aamir D Abid, Ian M Kennedy, Krassimira R Hristova, Wendy K Silk.
Abstract
CuO nanoparticles (CuO-NP) were synthesized in a hydrogen diffusion flame. Particle size and morphology were characterized using scanning mobility particle sizing, Brunauer-Emmett-Teller analysis, dynamic light scattering, and transmission electron microscopy. The solubility of CuO-NP varied with both pH and presence of other ions. CuO-NP and comparable doses of soluble Cu were applied to duckweeds, Landoltia punctata. Growth was inhibited 50% by either 0.6 mg L(-1) soluble copper or by 1.0 mg L(-1) CuO-NP that released only 0.16 mg L(-1) soluble Cu into growth medium. A significant decrease of chlorophyll was observed in plants stressed by 1.0 mg L(-1) CuO-NP, but not in the comparable 0.2 mg L(-1) soluble Cu treatment. The Cu content of fronds exposed to CuO-NP is four times higher than in fronds exposed to an equivalent dose of soluble copper, and this is enough to explain the inhibitory effects on growth and chlorophyll content.Entities:
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Year: 2011 PMID： 21333422 PMCID： PMC3277788 DOI： 10.1016/j.envpol.2011.01.028
Source DB: PubMed Journal: Environ Pollut ISSN： 0269-7491 Impact factor: 8.071