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Antimicrobial activities of commercial nanoparticles

Jun 26, 2009 · The release of heavy metal-containing nanoparticles (NP) into the environment may be harmful to the efficacy of beneficial microbes that function in element cycling, pollutant degradation and plant growth. Nanoparticles of Ag, CuO and ZnO are of interest as antimicrobials against pathogenic bacteria. We demonstrate here their antimicrobial activity against the beneficial soil microbe CuO and ZnO Nanoparticle Application in Synthetic Soil with 41 nm ZnO (200600 mg/kg soil) and 47 nm CuO (12.550 mg/kg soil) nanoparticles (NPs) to analyze growth response and yield character-istics. B. nigra seed germination was not aected by CuO NPs, but signicant toxicity was observed by ZnO NP treatment. Both NPs signicantly increased the growth prole of B. nigra, i.e., the

The neglected nano-specific toxicity of ZnO nanoparticles

Apr 20, 2016 · Ivask, A. et al. Mechanisms of toxic action of Ag, ZnO and CuO nanoparticles to selected ecotoxicological test organisms and mammalian cells in vitro:A comparative review. Nanotoxicology 8, 57 Toxicity and translocation of Ag, CuO, ZnO and TiO2 In conventional monolayers on impermeable supports, cell viability declined according to classical sigmoidal doseresponse curves with EC50 values between 0.28 mg L 1 and >100 mg L 1 in the following rank order, from the most toxic (lowest EC50) to the least toxic (highest EC50):PVPAg NPs < uncoated Ag NPs < CuO NPs < ZnO NPs < TiO 2 NPs. When cells were cultured on permeable Toxicity of Ag, CuO and ZnO nanoparticles to selected Jun 01, 2013 · Surprisingly, the NPs were less toxic to bacteria than to aquatic organisms:the median MIC values for bacteria were 7.1, 200 and 500 mg/L for Ag, CuO and ZnO NPs, respectively. In comparison, the respective median L(E)C50 values for mammalian cells were 11.3, 25 and 43 mg/L.

Toxicity of TiO2, SiO2, ZnO, CuO, Au and Ag engineered

Acute toxicity of four metal oxide nanoparticles (TiO 2, SiO 2, ZnO and CuO) and two metal nanoparticles (Ag and Au) to nauplii of Artemia and on the hatching of their hydratedcysts hasbeen studied.Forthe standardArtemiatestandhatchingtest,mortality and hatching rates were considered as end points. Both the tests exhibit a good inverse Toxicity of TiO2, SiO2, ZnO, CuO, Au and Ag engineered May 25, 2018 · In parallel, Standard Artemia toxicity test was conducted on the nauplii monitoring the viability. A comparison of results obtained in both experiments is discussed. The toxicity of the nanoparticles was compared and the order of toxicity is estimated as Ag>CuO>ZnO>Au>TiO2>SiO2. WO3ZnO and CuOZnO nanocomposites as highly efficient Apr 08, 2020 · Transient photocurrents of the WO 3 /ZnO and CuO/ZnO nanocomposites in 0.1 M NaOH solution (pH = 13) under simulated AM 1.5 (100 mW cm 2) illumination are shown in figure 4. Photocurrents of the nanocomposites were measured in a three-electrode configuration with a Ag/AgCl reference electrode and Pt counter-electrode to evaluate their

Toxicity of Ag, CuO and ZnO nanoparticles to selected

The need for toxicity data on ZnO, CuO and Ag (nano)particles Toxicity data and data quality gaps for nanoparticles The scientic information on potential harmful effects of NPs severely lags behind the development of nano-technologies (Shvedova et al. 2010;KahruandIvask 2013). In addition, the available nanotoxicity data are