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21. Mechanisms and Measurement of Nanomaterial-Induced Oxidative Damage to DNA
Topic: Nanotech/Environment, Health & Safety
Published: 6/22/2010
Authors: Bryant C Nelson, Elijah J Petersen
Abstract: Many of the current investigations on the environmental health and human safety risks of engineered nanomaterials focus on their short-term acute effects. However, the long-term chronic effects of nanomaterials on living systems, and in particular, ...

22. Method for Assessing the Potential Effects of Nanoparticles and other Emerging Contaminants on the Catabolic Capabilities of Microbial Communities
Topic: Nanotech/Environment, Health & Safety
Published: 9/1/2013
Authors: Kela Weber, Elijah J Petersen, Sonja Bissegger, Lars Rehmann, Iris Koch, Jun Zhang, Kenneth Reimer, Robin Slawson, Raymond Legge, Denis O'Carroll
Abstract: With an increasing utilization of nanoparticles (NPs) in consumer products, the potential for release to the environment also increases. It is therefore imperative that methods to test their potential effects in ecosystems are developed. This study d ...

23. NIST Gold Nanoparticle Reference Materials Do Not Induce Oxidative DNA Damage
Topic: Nanotech/Environment, Health & Safety
Published: 2/1/2013
Authors: Bryant C Nelson, Donald H Atha, John T Elliott, Bryce J. Marquis, Elijah J Petersen, Danielle Cleveland, Stephanie S Watson, I-Hsiang Tseng, Andrew Dillon, Melissa Theodore, Joany Jackman
Abstract: Well-characterized, nanoparticle reference materials are urgently needed for nanomaterial toxicity studies. The National Institute of Standards and Technology has developed three gold nanoparticle (AuNP) reference materials (10 nm, 30 nm, 60 nm) to ...

24. Nanoscale Reference Materials for Environmental, Health, and Safety Measurements: Needs, Gaps, and Opportunities
Topic: Nanotech/Environment, Health & Safety
Published: 11/7/2012
Authors: Aleksandr B. Stefaniak, Vincent A Hackley, Gert Roebben, Kensei Ehara, Steve Hankin, Michael T Postek, Iseult Lynch, Wei-En Fu, Thomas P.J. Linsinger, Andreas Th?nemann
Abstract: There is a need to understand and manage potential risks posed to workers, the public, and the environment from exposure to engineered nanomaterials. In response, several organizations have developed lists of relevant nano-objects and of physico-che ...

25. Nanosilver suppresses growth and induces oxidative damage to DNA in Caenorhabditis elegans
Topic: Nanotech/Environment, Health & Safety
Published: 5/2/0013
Authors: Bryant C Nelson, Bryce J. Marquis, Piper Reid Hunt, Katherine M Tyner, Sean Conklin, Nicholas Olejnik, Robert L Sprando
Abstract: The utility of C. elegans as an alternative model to assess nanomaterial toxicity was evaluated using 10 nm silver particles (10nmAg). Endpoints of nanomaterial uptake and localization, larval growth, morphology, and DNA damage were assessed. Orall ...

26. Oxidatively Induced Damage to DNA: Potential Role of Single-Wall Carbon Nanotubes at the Molecular Level
Topic: Nanotech/Environment, Health & Safety
Published: 5/13/2013
Authors: Elijah J Petersen, Xiaomin X. Tu, M Miral Dizdar, Ming Zheng, Bryant C Nelson
Abstract: Ultrasonication is a physical process known to generate abundant levels of oxygen-derived species such as hydroxyl radicals, hydrogen atoms, and hydrogen peroxide. When used to process DNA solutions, these highly reactive hydroxyl radicals can react ...

Topic: Nanotech/Environment, Health & Safety
Published: 1/24/2011
Authors: Julian S. Taurozzi, Vincent A Hackley
Abstract: This work prescribes the preparation of a P25 nanoparticle dispersion in high purity deionized water, as a first step towards the preparation of nanoscale P25 dispersions in relevant biological and environmental matrices. This protocol should be used ...

28. Persistence of Singly Dispersed Silver Nanoparticles in Natural Freshwaters, Synthetic Seawater, and Simulated Estuarine Waters
Topic: Nanotech/Environment, Health & Safety
Published: 4/28/2011
Authors: Stephanie L Chinnapongse, Robert I. MacCuspie, Vincent A Hackley
Abstract: The use of silver nanoparticles (AgNPs) in consumer products has become increasingly widespread over the past decade. These products are being used and distributed world-wide, creating a risk of AgNPs flowing into rivers and oceans via wastewater. Th ...

29. Phase Distribution of 14C-labeled Multi-walled Carbon Nanotubes in Aqueous Systems Containing Model Solids: Peat
Topic: Nanotech/Environment, Health & Safety
Published: 1/11/2011
Authors: Elijah J Petersen, Liwen Zhang, Qingguo Huang
Abstract: Understanding the sorption interactions between nanoparticles and soils or sediments is a critical factor in determining their fate in environmental systems. As such, we examined the interactions of 14C-labeled multi-walled carbon nanotubes (MWNTs) ...

30. Photo-induced Surface Transformation of Silica Nanocomposites
Topic: Nanotech/Environment, Health & Safety
Published: 6/22/2012
Authors: Justin M Gorham, Tinh Nguyen, Coralie Bernard, Deborah L Stanley, Richard D Holbrook
Abstract: The physicochemical, UV-induced surface modifications to silica nanoparticle (SiNP) - epoxy composites have been investigated. The silica nanocomposites (SiNCs) were prepared using a two-part epoxy system with 10 % mass fraction of SiNPs and expose ...

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