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Displaying records 11 to 20 of 35 records.
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11. Effects of Polyethyleneimine-Mediated Functionalization of Multi-Walled Carbon Nanotubes on Earthworm Bioaccumulation and Sorption by Soils
Topic: Nanotech/Environment, Health & Safety
Published: 3/24/2011
Authors: Elijah J Petersen, Roger A Pinto, Liwen Zheng, Qingguo Huang, Peter E Landrum, Walter J. Weber
Abstract: Carbon nanotubes (CNTs) are often modified for their different intended application potentials to enhance their aqueous stability or change properties such as their surface charge. Such changes may also profoundly impact their environmental behavior ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905634

12. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902692

13. Highly selective GaN-nanowire/TiO2-nanocluster hybrid sensors for detection of benzene and related environment pollutants
Topic: Nanotech/Environment, Health & Safety
Published: 6/15/2011
Author: Norman A Sanford
Abstract: Nanowire–nanocluster hybrid chemical sensors were realized by functionalizing gallium nitride (GaN) nanowires (NWs) with titanium dioxide (TiO2) nanoclusters for selectively sensing benzene and other related aromatic compounds. Hybrid sensor device ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909995

14. Humic Acid-Mediated Silver Nanoparticle Formation Under Environmentally Relevant Conditions
Topic: Nanotech/Environment, Health & Safety
Published: 4/1/2011
Authors: Nelson Akaighe, Robert I MacCuspie, Divina A Navarro, Diana S Aga, Sarbajit Banerjee, Mary Sohn, Virender K Sharma
Abstract: The formation of silver nanoparticles (AgNPs) via reduction of silver ions (Ag+) in the presence of humic acids (HAs) under various environmentally relevant conditions is described. HAs tested were from Suwannee River (SUW), and samples of three se ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907224

15. Impact of Porous Media Grain Size on the Transport of Multiwalled Carbon Nanotubes
Topic: Nanotech/Environment, Health & Safety
Published: 9/28/2011
Authors: Nikolai Mattison, Denis O'Carroll, R. Kerry Rowe, Elijah J Petersen
Abstract: Nanomaterials possess unique physical, electrical and chemical properties which make them attractive for use in a wide range of applications. Through their use and eventual disposal, nanomaterials may ultimately be released into the subsurface enviro ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907834

16. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906209

17. Magnetic Field-Induced Biomimetic Self-Assemblies of Cobalt Nanoparticles
Topic: Nanotech/Environment, Health & Safety
Published: Date unknown
Authors: Guangjun Cheng, D B Romero, Angela R Hight Walker
Abstract: Under the influence of a 300-Guass magnetic field, 15-nm Co nanoparticles can assemble into centimeter-long rigid chains in the colloidal solution. The magnetic field-induced (MFI) chains are retained after the removal of the magnetic field, but they ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841868

18. 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, ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905201

19. NIST Gold Nanoparticle Reference Materials Do Not Induce Oxidative DNA Damage
Topic: Nanotech/Environment, Health & Safety
Published: 5/23/2011
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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906893

20. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913561