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Topic Area: Nanotech/Environment, Health
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Displaying records 11 to 20 of 30 records.
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11. Quantifying Dithiothreitol Displacement of Functional Ligands from Gold Nanoparticles
Topic: Nanotech/Environment, Health & Safety
Published: 10/27/2012
Authors: De-Hao D. Tsai, Frank W DelRio, Sherrie R. Elzey, Suvajyoti S. Guha, Michael Russel Zachariah, Vincent A Hackley, Melanie P Shelton
Abstract: Dithiothreitol (DTT)-based displacement is widely utilized for separating ligands from their gold nanoparticle (AuNP) conjugates, a critical step for differentiating and quantifying surface-bound functional ligands and therefore the effective surface ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911354

12. Evaluation of viability and proliferation profiles on macrophages treated with silica nanoparticles in vitro via plate-based, flow cytometry, and Coulter counter assays
Topic: Nanotech/Environment, Health & Safety
Published: 9/3/2012
Authors: Simona Bancos, De-Hao D. Tsai, Vincent A Hackley, J L Weaver, Katherine M Tyner
Abstract: Nanoparticles (NPs) are known to interfere with many high throughput cell viability and cell proliferation assays, which complicates the assessment of their potential toxic effects. The aim of this study was to compare viability and proliferation res ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911765

13. Disentangling the effects of polymer coatings on silver nanoparticle agglomeration, dissolution, and toxicity to determine mechanisms of nanotoxicity
Topic: Nanotech/Environment, Health & Safety
Published: 9/1/2012
Authors: Justin M Zook, Melissa Danielle Halter, Danielle Cleveland, Stephen E Long
Abstract: Silver nanoparticles (AgNPs) are frequently coated by a variety of polymers, which may affect various intertwined mechanisms of toxicity, including agglomeration and dissolution rate. Here, we measure how citrate, dextran, poly(ethylene glycol) (PEG ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908497

14. Tumor Necrosis Factor Interaction with Gold Nanoparticles
Topic: Nanotech/Environment, Health & Safety
Published: 3/14/2012
Authors: De-Hao D. Tsai, Sherrie R. Elzey, Frank W DelRio, Robert I. MacCuspie, Suvajyoti S. Guha, Michael Russel Zachariah, Athena M Keene, Jeffrey D Clogston, Vincent A Hackley
Abstract: We report on a systematic investigation of molecular conjugation of tumor necrosis factor protein-α (TNF) onto gold nanoparticles (AuNPs) and the subsequent binding behavior to its antibody (anti-TNF). We employ a combination of physical and spe ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909899

15. Pilot Estuarine Mesocosm Study on the Environmental Fate of Silver Nanomaterials Leached from Consumer Products
Topic: Nanotech/Environment, Health & Safety
Published: 1/10/2012
Authors: Danielle Cleveland, Stephen E Long, Paul L. Pennington, Emily Cooper, Michael H. Fulton, Geoffrey I. Scott, Elijah J Petersen, Timothy M Brewer, Jeffrey M. Davis, Laura J Wood
Abstract: Although nanosilver consumer products (CPs) now enjoy widespread availability, little work has been done to determine the environmental fate and leaching of silver nanoparticles (AgNPs) from these products. This type of work is crucial, since the lif ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906343

16. Predictive Gold Nanocluster Formation Controlled by Metal-Ligand Complexes
Topic: Nanotech/Environment, Health & Safety
Published: 1/9/2012
Authors: John M Pettibone, Jeffrey W Hudgens
Abstract: The formation of ligand-protected transition metal nanoclusters in size-selective syntheses is driven by the inherent properties of the protecting ligands. We have previously reported the selective, monodisperse product formation of phosphine protect ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908225

17. Determination of Moisture Content of Single-Wall Carbon Nanotubes
Topic: Nanotech/Environment, Health & Safety
Published: 10/17/2011
Authors: Rolf Louis Zeisler, Rabia Oflaz, Ralph E. Sturgeon, Rick L Paul, Brian E Lang, Jeffrey A Fagan, Joseph W Lam, Anthony Windust, P Grinberg, Benoit Simard, Christopher T. Kingston
Abstract: Several techniques were evaluated for the establishment of reliable water/moisture content of single-wall carbon nanotubes. Karl Fischer titration (KF) provides for a direct measure of the water content and was used for benchmarking against results ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908873

18. Measuring agglomerate size distribution and dependence of localized surface plasmon resonance absorbance on gold nanoparticle agglomerate size using analytical ultracentrifugation
Topic: Nanotech/Environment, Health & Safety
Published: 9/3/2011
Authors: Justin M Zook, Vinayak Rastogi, Robert I. MacCuspie, Athena M Keene, Jeffrey A Fagan
Abstract: Nanoparticles frequently agglomerate when dispersed into relevant biological and environmental media, with the resulting change to the effective size distribution dramatically affecting the potential nanotoxicity and the absorbance for biosensor ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908878

19. Exposure and Fire Hazard Assessment of Nanoparticles in Fire Safe Consumer Products: Interagency Agreement Final Report
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7805
Topic: Nanotech/Environment, Health & Safety
Published: 8/4/2011
Authors: Rick D Davis, Yeon S. Kim, Richard H. Harris Jr., Marc R. Nyden, Nasir M. Uddin, Treye Thomas
Abstract: An innovative technology was evaluated to generate fire and health safe soft furnishings. Nanoparticle-based thin coatings on a polyurethane foam and nonwoven barrier fabric were applied using Layer-by-layer (Lbl) assembly. This is the first report ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908275

20. Measuring silver nanoparticle dissolution in complex biological and environmental matrices using UV-Visible absorbance
Topic: Nanotech/Environment, Health & Safety
Published: 8/2/2011
Authors: Justin M Zook, Stephen E Long, Danielle Cleveland, Carly Lay Geronimo, Robert I. MacCuspie
Abstract: Distinguishing the toxic effects of nanoparticles (NPs) themselves from the well-studied toxic effects of their ions is a critical but challenging measurement for nanotoxicity studies and regulation. This measurement is especially difficult for silv ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907804



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