Journal ArticleDOI
Physiological effects of nanoparticles on fish: A comparison of nanometals versus metal ions
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It is concluded that nanometals do have adverse physiological effects on fish, and the hazard for some metal NPs will be different to the traditional dissolved forms of metals.About:
This article is published in Environment International.The article was published on 2011-08-01. It has received 359 citations till now. The article focuses on the topics: Metal toxicity.read more
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Immobilized silver nanoparticles enhance contact killing and show highest efficacy: elucidation of the mechanism of bactericidal action of silver
TL;DR: In this study, AgNPs were immobilized on an amine-functionalized silica surface and their bactericidal activity was studied concurrently with the silver release profile over time, concluding that contact killing is the predominant bactericidal mechanism and surface immobilized nanoparticles show greater efficacy than colloidal AgNPS, as well as a higher concentration of silver ions in solution.
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The antibacterial effects of silver, titanium dioxide and silica dioxide nanoparticles compared to the dental disinfectant chlorhexidine on Streptococcus mutans using a suite of bioassays.
TL;DR: Metal-containing nanomaterials have the potential to be used in dentistry for infection control, but little is known about their antibacterial properties, and Ag NPs were the best disinfectant and performed better than chlorhexidine.
Journal ArticleDOI
Zebrafish as a model system to study toxicology.
Yu-Jie Dai,Yong-Fang Jia,Na Chen,Wan-Ping Bian,Qinkai Li,Yan-Bo Ma,Yan-Ling Chen,De-Sheng Pei +7 more
TL;DR: The authors address the new direction of developing high‐throughput detection of genetically modified transparent zebrafish to open a new window for monitoring environmental pollutants.
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Nanoparticle toxicity by the gastrointestinal route: evidence and knowledge gaps.
TL;DR: Focus was placed on three categories of nanomaterials: nanometals and metal oxides, carbon-based nanoparticles, and polymer/dendrimers with emphasis on those particles of greatest relevance to gastrointestinal exposures.
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Impacts of metal and metal oxide nanoparticles on marine organisms.
TL;DR: In marine systems, Me(O)NPs can absorb to micro-organisms with potential for trophic transfer following consumption, and their likely fate here is sedimentation following hetero-aggregation with natural organic matter and/or free anions, putting benthic, sediment-dwelling and filter feeding organisms most at risk.
References
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Biotic Ligand Model, a Flexible Tool for Developing Site-Specific Water Quality Guidelines for Metals
Soumya Niyogi,Chris M. Wood +1 more
TL;DR: The biotic ligand model is critically evaluated for copper, silver, zinc, and nickel and gill binding approaches for cadmium, lead, and cobalt on which BLMs could be based and issues of concern include the arbitrary nature of LA50 adjustments.
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Manufacture and use of nanomaterials: current status in the UK and global trends
TL;DR: An overview of the production and use of nanomaterials (NMs), particularly in the UK, is provided, the main emphasis being the bulk markets in metals and metal oxides, and some niche markets such as carbon nanotubes and quantum dots.
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Toxicity Assessments of Multisized Gold and Silver Nanoparticles in Zebrafish Embryos
TL;DR: It is proposed that nanoparticle chemistry is as, if not more, important than specific nanosizes at inducing toxicity in vivo and should lead to the identification of nanomaterial characteristics that afford minimal or no toxicity and guide more rational designs of materials on the nanoscale.
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Toxicity of single walled carbon nanotubes to rainbow trout, (Oncorhynchus mykiss): respiratory toxicity, organ pathologies, and other physiological effects.
TL;DR: It is concluded that SWCNTs are a respiratory toxicant in trout, the fish are able to manage oxidative stress and osmoregulatory disturbances, but other cellular pathologies raise concerns about cell cycle defects, neurotoxicity, and as yet unidentified blood borne factors that possibly mediate systemic pathologies.
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Exposure to Copper Nanoparticles Causes Gill Injury and Acute Lethality in Zebrafish (Danio rerio)
Robert J. Griffitt,Roxana Weil,Kelly A. Hyndman,Nancy D. Denslow,Kevin W. Powers,David Taylor,David S. Barber +6 more
TL;DR: Zebrafish were exposed to 100 microg/L of nanocopper or to the concentration of soluble copper matching that present due to dissolution of the particles, clearly demonstrating that the effects of Nanocopper on gill are not mediated solely by dissolution.