News Column

Reports Summarize Nanoparticles Study Results from University of California

May 13, 2014



By a News Reporter-Staff News Editor at Life Science Weekly -- Current study results on Nanoparticles have been published. According to news reporting originating in Davis, California, by NewsRx journalists, research stated, "The increasing use of manufactured nanoparticles (NP) in different applications has triggered the need to understand their putative ecotoxicological effects in the environment. Copper oxide nanoparticles (CuO NP) are toxic, and induce oxidative stress and other pathophysiological conditions."

The news reporters obtained a quote from the research from the University of California, "The unique properties of NP can change depending on the characteristics of the media they are suspended in, altering the impact on their toxicity to aquatic organisms in different environments. Here, Mozambique tilapia (O. mossambicus) were exposed to flame synthesized CuO NP (0.5 and 5 mg · L(-1)) in two environmental contexts: (a) constant freshwater (FW) and (b) stepwise increase in environmental salinity (SW). Sublethal effects of CuO NP were monitored and used to dermine exposure endpoints. Fish exposed to 5 mg · L(-1) CuO in SW showed an opercular ventilation rate increase, whereas fish exposed to 5 mg · L(-1) in FW showed a milder response. Different effects of CuO NP on antioxidant enzyme activities, accumulation of transcripts for metal-responsive genes, GSH ? GSSG ratio, and Cu content in fish gill and liver also demonstrate that additive osmotic stress modulates CuO NP toxicity."

According to the news reporters, the research concluded: "We conclude that the toxicity of CuO NP depends on the particular environmental context and that salinity is an important factor for modulating NP toxicity in fish."

For more information on this research see: Sublethal effects of CuO nanoparticles on Mozambique tilapia (Oreochromis mossambicus) are modulated by environmental salinity. Plos One, 2014;9(2):e88723. (Public Library of Science - www.plos.org; Plos One - www.plosone.org)

Our news correspondents report that additional information may be obtained by contacting F.D. Villarreal, Dept. of Animal Science, University of California-Davis, Davis, California, United States. Additional authors for this research include G.K. Das, A. Abid, I.M. Kennedy and D. Kultz (see also Nanoparticles).

Keywords for this news article include: Davis, California, United States, Nanotechnology, Emerging Technologies, North and Central America.

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Life Science Weekly


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