John Wiley & Sons, Ltd.

Size‐dependent impacts of silver nanoparticles on the lifespan, fertility, growth, and locomotion of Caenorhabditis elegans

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The increased bioavailability of nanoparticles engineered for good dispersion in water may have biological and environmental impacts. To examine the present issue, we assessed the biological effects in nematodes as they relate to exposure to silver nanoparticles (AgNP) of different sizes at low (1 mg/L Ag), medium (10 mg/L Ag), and high concentrations (100 mg/L Ag). Over multiple generations, we commonly found that the smallest particle at 2 nm had a notable impact on nematode fertility. In contrast, the largest particle at 10 nm significantly reduced the lifespan of parent nematodes (P0) by 28.8% and over the span of three generations (F1‐F3). Additionally, a computer vision system automatically measured the adverse effects in body length and motility, which were not size‐dependent. Environ Toxicol Chem © 2014 SETAC

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