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Displaying 601 - 625 of 1756

Antioxidant Cerium Oxide Nanoparticles in Biology and Medicine

May 17, 2016

Author(s)

Bryant C. Nelson, Monique E. Johnson, Marlon L. Walker, Kathryn R. Riley, Christopher M. Sims

Previously, catalytic cerium oxide nanoparticles (CNPs, nanoceria, CeO2-x NPs) have been widely utilized for chemical mechanical planarization in the semiconductor industry and for reducing harmful emissions and improving fuel combustion efficiency in the

Intensity Ratio of Resonant Raman Modes for (n,m) Enriched Semiconducting Carbon Nanotubes

April 29, 2016

Author(s)

Yanmei Piao, Jeffrey R. Simpson, Jason K. Streit, Geyou Ao, Ming Zheng, Angela R. Hight Walker

Relative intensities of resonant Raman spectral features, specifically the radial breathing mode (RBM) and G modes, of eleven chirality-enriched single-wall carbon nanotube (SWCNT) species were established under second-order optical transition excitation

Engineered metal nanoparticles in the sub-nanomolar levels kill cancer cells

April 18, 2016

Author(s)

Yasmine C. Daniels, William A. MacCrehan, Shinichiro Muramoto, Gheorghe NMN Stan, Vitaly Vodyanoy, Oleg Pustovyy

Zinc and copper metal nanoparticles were produced from bulk metal rods by an underwater high-voltage discharge method. The metal nanoparticles, with estimated diameters of 1 nm to 2 nm, were determined to be more than 85 % non-oxidized. Exposure of rat RG2

Influence of Nanoparticle Processing and Additives on PES Casting Solution Viscosity and Cast Membrane Characteristics

April 12, 2016

Author(s)

Lauren F. Greenlee, Nikki S. Rentz

Nanoparticle stabilizer type, casting solution additives, and nanoparticle processing by centrifugal or magnetic separation were varied, and specific membrane characteristics were evaluated. Specifically, membrane casting solution viscosity, cast membrane

Kinetics of Photodegradation and Nanoparticle Surface Accumulation of a Nanosilica/Epoxy Coating Exposed to UV Light

April 11, 2016

Author(s)

Li Piin Sung, Justin Gorham, Deborah Jacobs, Savelas A. Rabb, Lee L. Yu, Tinh Nguyen

Temperature effect on the kinetics of photodegradation, surface accumulation of nanoparticles, and nanoparticle release in an epoxy nanocoating exposed to ultraviolet light (UV) was investigated. A model epoxy coating containing 5 % untreated nanosilica

Chironomus riparius exposure to fullerene-contaminated sediment results in oxidative stress and may impact life cycle parameters

April 8, 2016

Author(s)

Greta Waissi-Leinonen, S Bold, J Akkanen, Matti Leppanen, Elijah Petersen, JVK Kukkonen

A key component of understanding the potential environmental risks of fullerenes (nC60) is their potential effects on benthic invertebrates. Using the sediment dwelling invertebrate Chironomus riparius we explored the effects of acute (12 h and 24 h) and

Consumer Exposure Studies I: General Products Consumer Exposure Studies I: General Products

March 28, 2016

Author(s)

Keana C. Scott, Marina Vance

Adhesive contact between a rigid spherical indenter and an elastic multi-layer coated substrate

March 8, 2016

Author(s)

Gheorghe Stan, George Adams

In this work the frictionless, adhesive contact between a rigid spherical indenter and an elastic multi-layer coated half-space was investigated by means of an integral transform formulation. The indented multi-layer coats were considered as made of

Analytical Measurements of Nanoparticles in Challenging and Complex Environments

March 3, 2016

Author(s)

Bryant C. Nelson, Vytautas Reipa

Robust analytical methods for the characterization and measurement of engineered nanoparticles (ENPs) in complex media (e.g. soils, air, foods, tissues) are critical for nanomaterial environmental health and human safety risk assessments. However, there

Biodistribution and Toxicity of Radio-labeled Few Layer Graphene in Mice after Intratracheal Instillation

February 11, 2016

Author(s)

Bingcai Pan, Maoji Hu, Liang Mao, Xuxiang Zhang, Elijah Petersen

BACKGROUND: The potential human health risks from graphene inhalation exposure have attracted substantial scientific interest as a result of the numerous exciting potential commercial applications of graphene. However, the long-term distribution in

Noise analysis for through-focus scanning optical microscopy method

February 3, 2016

Author(s)

Ravikiran Attota

Strategies for scanning electron microscopy sample preparation and characterization of multiwall carbon nanotube polymer composites

January 20, 2016

Author(s)

Andras Vladar

This guideline presents methods for the preparation and investigation of samples of multiwall carbon nanotube-polymer composites by scanning electron microscopy. It is focused on multiwall carbon nanotube epoxy composite, but the strategy should be

Does Your SEM Really Tell the Truth?-How Would You Know? Part 4: Charging and its Mitigation

January 19, 2016

Author(s)

Michael T. Postek, Andras E. Vladar

This is the fourth part of a series of tutorial papers discussing various causes of measurement uncertainty in scanned particle beam instruments. Scanned particle beam instruments especially the scanning electron microscope (SEM) have gone through

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