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Topic Area: Nanotech/Environment, Health
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Displaying records 11 to 20 of 49 records.
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11. 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

12. Tools and Approaches for the Assessment of Nanomaterial Induced Oxidative DNA Damage
Topic: Nanotech/Environment, Health & Safety
Published: 5/13/2013
Authors: Elijah J Petersen, Bryce Marquis, Pawel Jaruga, M Miral Dizdar, Bryant C Nelson
Abstract: Hyphenated mass spectrometry techniques have been employed as one of the primary analytical tools for investigating the effects of ionizing radiation, chemical/biological carcinogens, and oxygen derived free radicals on the induction and subsequent r ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913562

13. FABRICATION AND CHARACTERIZATION OF STANDARDS FOR ATOMIC FORCE MICROSCOPE TIP WIDTH CALIBRATION
Topic: Nanotech/Environment, Health & Safety
Published: 3/25/2013
Authors: Ronald G Dixson, Craig Dyer McGray, Boon Ping Ng, Ndubuisi George Orji, Jon C Geist
Abstract: The National Institute of Standards and Technology (NIST) has been developing methods and standards to enable the traceable calibration of critical dimension atomic force microscopy (CD AFM). This technique involves flared tips and two-dimensional s ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912865

14. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906893

15. Standard Guide for Size Measurement of Nanoparticles Using Atomic Force Microscopy
Topic: Nanotech/Environment, Health & Safety
Published: 1/1/2013
Authors: Vincent A Hackley, Frank W DelRio
Abstract: The purpose of this document is to provide guidance on the quantitative application of atomic force microscopy (AFM)to determine the size of nanoparticles2 deposited in dry form on flat substrates using height (z-displacement) measurement. Unlike ele ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912221

16. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910519

17. Aggregation/agglomeration state of carbon nanotubes
Topic: Nanotech/Environment, Health & Safety
Published: 10/12/2012
Authors: Vivek M Prabhu, Toshiya Okazaki, Takeshi Eitoku, Masayoshi Tange, Haruhisa Kato
Abstract: Evaluation of aggregation and agglomeration of carbon nanotube (CNT) solution has been one of the key issues for applications. Here we introduce a simple method based on depolarized dynamic light scattering (DDLS) performed at multiple scattering ang ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912177

18. UV-induced photochemical transformations of citrate capped silver nanoparticle suspensions
Topic: Nanotech/Environment, Health & Safety
Published: 9/14/2012
Authors: Justin M Gorham, Robert I. MacCuspie, Kate L Klein, D Howard Fairbrother, Richard D Holbrook
Abstract: Due to the increasing use of silver nanoparticles (AgNPs) in consumer products, it is essential to understand how variables, such as light exposure, may change the physical and chemical characteristics of AgNP suspensions. To this end, the effect o ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911250

19. Protective roles of single-wall carbon nanotubes in ultrasonication-induced DNA base damage
Topic: Nanotech/Environment, Health & Safety
Published: 8/27/2012
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. Highly reactive hydroxyl radicals can react with DNA to generate strand breaks and a m ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911310

20. Effects of chlorine and other water quality parameters on the release of silver nanoparticles from a ceramic surface
Topic: Nanotech/Environment, Health & Safety
Published: 8/11/2012
Authors: Michael W Stewart, Angela Bielefeldt, Elisabeth Mansfield, R. Scott Summers, Joseph N Ryan
Abstract: A quartz crystal microbalance was used to determine the effects of different water quality parameters on the desorption of silver nanoparticles from surfaces representative of ceramic water filters (CWFs). Silver nanoparticles stabilized with 25-30% ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911517



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