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41. 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) ...

42. Colloidal Stability of Silver Nanoparticles in Biologically Relevant Conditions
Topic: Nanotech/Environment, Health & Safety
Published: 12/30/2010
Author: Robert I. MacCuspie
Abstract: Understanding the colloidal stability of nanoparticles may play a key role in interpretation of toxicological experiments, in determining if single nanoparticles or their aggregates provided the dominant result. This report examines a variety of ins ...

43. Influence of Polyethyleneimine Graftings of Multi-Walled Carbon Nanotubes on Their Accumulation and Elimination by and Toxicity to Daphnia magna
Topic: Nanotech/Environment, Health & Safety
Published: 12/23/2010
Authors: Elijah J Petersen, Roger A Pinto, Danielle J Mai, Peter E Landrum, Walter J. Weber
Abstract: Carbon nanotubes (CNTs) are often modified for different intended applications which often changes the nanotubes‰ physicochemical properties, such as surface charge. Assessing the extent to which such modifications to carbon nanotubes influence thei ...

44. Ultrasonic Dispersion of Nanoparticles for Environmental, Health and Safety Assessment--Issues and Recommendations
Topic: Nanotech/Environment, Health & Safety
Published: 11/30/2010
Authors: Julian S. Taurozzi, Vincent A Hackley, Mark R. Wiesner
Abstract: A common approach for the study of the environmental and biological interactions of nanomaterials relies on the ultrasonic disruption of powders to obtain nanoparticle suspensions. Yet, the widespread and inconsistent use of ultrasonic treatment acro ...

45. Dispersion Stabilization of Silver Nanoparticles in Synthetic Lung Fluid Studied under In-Situ Conditions
Topic: Nanotech/Environment, Health & Safety
Published: 8/23/2010
Authors: Robert I. MacCuspie, Andrew John Allen, Vincent A Hackley
Abstract: The dispersion stabilization of silver nanoparticles in synthetic lung fluid is studied systematically to determine the key ingredients for colloidal stabilization. A variety of in-situ techniques are used, including dynamic light scattering, UV-Vis ...

46. Reporting Guidelines for the Preparation of Nanoparticle Dispersions from Dry Materials
Topic: Nanotech/Environment, Health & Safety
Published: 7/8/2010
Authors: Julian S. Taurozzi, Vincent A Hackley, Mark R. Wiesner
Abstract: This document provides general guidelines for reporting relevant conditions and critical parameters relating to the dispersion of nanoparticles in liquid media, including the application of ultrasonic energy or other mechanical dispersion methods (se ...

47. 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, ...

48. First approaches to standard protocols and reference materials for the assessment of potential hazards associated with nanomaterials
Topic: Nanotech/Environment, Health & Safety
Published: 9/19/2009
Authors: Iseult Lynch, Hans Bouwmeester, Hans Marvin, Alan Casey, Gordon Chambers, Markus Berges, Martin Clift, Teresa Fernandes, Lise Fjellsbo, Lucienne Juillerat, Gert Roebben, Christoph Klein, Qinglan Wu, Vincent A Hackley, Jean-Pierre Kaiser, Wolfgang Kreyling, C. Michael Garner, Peter Hatto, Kenneth Dawson, Michael Riediker
Abstract: This report presents the outcome of the discussions of 60 experts in the field of safety assessment of manufactured NMs from academia, industry, government and non-profit organizations on some of the critical issues pertaining to the development of s ...

49. Transmission electron microscopy characterization of colloidal copper nanoparticles and their chemical reactivity
Topic: Nanotech/Environment, Health & Safety
Published: 2/16/2009
Authors: Guangjun Cheng, Angela R Hight Walker
Abstract: A colloidal synthesis route was developed to produce face-centered cubic (fcc) copper (Cu) nanoparticles in the presence of the surfactants in an organic solvent under an argon environment. Various synthetic conditions have been explored to control t ...

50. 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 ...

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