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Search Publications

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Displaying 4576 - 4600 of 13217

Application of Blue Laser Triangulation Sensors for Displacement Measurement Through Fire

September 23, 2016
Author(s)
Matthew S. Hoehler, Christopher M. Smith
… to measure displacement of a target located behind or in the close proximity of natural gas diffusion flames. This … is predominantly normally distributed and the soot present in natural gas flames did not noticeably diminish the signal … Measurement Science & Technology …

in situ methods for monitoring silver nanoparticle sulfidation in simulated waters

September 16, 2016
Author(s)
John M. Pettibone, Jingyu Liu
… perturbation is ideal. Thus, we employed a suite of in situ measurements (single particle inductively coupled … available 40 kDa PVP-coated silver nanoparticles (AgNPs) in aerated, sulfide-containing media. The corrosion of two … media (surface and moderately hard reconstituted water). In contrast to previous reports of citrate or PVP-capped AgNP …

Design, sensitivity analysis, and testing of a Caenorhabditis elegans nanoecotoxicity assay

August 11, 2016
Author(s)
Shannon Hanna, Gregory A. Cooksey, Bryant C. Nelson, John T. Elliott, Elijah J. Petersen
… nanomaterials (ENMs) has generated widespread interest in measuring their environmental and human health effects. … has often led to contradictory results. Our goal in this study was to assess the feasibility of using a … was used to catalog potential sources of variability in the assay protocol. Sensitivity analysis of five key …

Cure temperature influences electrical properties via carbon nanotube-rich domain formation

July 27, 2016
Author(s)
Chelsea S. Davis, Nathan D. Orloff, Jeremiah W. Woodcock, Christian J. Long, Kevin A. Twedt, Bharath NMN Natarajan, Jonathan E. Seppala, Jabez J. McClelland, Jan Obrzut, James A. Liddle, Jeffrey W. Gilman
… structural and electrical properties for applications in the automotive and aerospace industries. CNT mass fraction … temperature affect electrical properties remains unclear. In many cases, nanofillers such as carbon nanotubes appear in concentrated domains within the nanocomposite. Recent …

Influence of Antimony-Halogen Additives on Flame Propagation

July 8, 2016
Author(s)
Valeri I. Babushok, Peter Deglmann, Gregory T. Linteris, Roland H. Kraemer
… model for flame inhibition by antimony-halogen compounds in hydrocarbon flames is developed. Thermodynamic data for … Sb-Br-C-H-O system. The main Sb- and Br-containing species in the combustion products and reaction zone are determined … and these are used to develop the species and reactions in a detailed kinetic model for antimony flame inhibition. …

Measured Wavelength-Dependent Absorption Enhancement of Internally Mixed Black Carbon with Absorbing and Nonabsorbing Materials

June 30, 2016
Author(s)
Rian You, James Radney, Michael R. Zachariah, Christopher D. Zangmeister
… visible to near-IR (550 to 840 nm). Spectra were measured in situ using a photoacoustic spectrometer and step-scanning … the mixture was chosen as 0.13 to mimic particles observed in the terrestrial atmosphere. The manner in which BC mixed with each material was determined from …

Considerations of Environmentally-Relevant Test Conditions for Improved Evaluation of Ecological Hazards of Engineered Nanomaterials

June 8, 2016
Author(s)
Patricia Holden, Jorge Gardea-Torresdey, Frederick Klaessig, Ronald Turco, Monika Mortimer, Kerstin Hund-Rinke, David Avery, Damia Barcelo, Renata Behra, Yoram Cohen, Laurence Deydier-Stephan, Barbara Harthorn, Danail Hristozov, John Johnston, Agnes Kane, Larry Kaputska, Arturo Keller, Hunter Lenihan, Wess Lovell, Catherine Murphy, Roger Nisbet, Elijah Petersen, Martin Scheringer, Monita Sharma, David Speed, Yasir Sultan, Jason White, Eva Wong, Baoshan Xing, Meghan Steele Horan, Hilary Godwin, Andre Nel
… effective concentrations, which often exceed those in the environment. ENM behaviors in complex media impede measuring or predicting real-world … observable. What exposure conditions are typically used in assessing ENM hazards to populations? What conditions are …

An objectively-analyzed method for measuring the useful penetration of x-ray imaging systems

May 11, 2016
Author(s)
Jack L. Glover, Lawrence T. Hudson
… of the cabinet x-ray imaging systems that are used in aviation security as well as the portable x-ray systems … which are inherently subjective. We propose a new method in which the useful penetration capabilities of an x-ray … human- judged results. The method was developed to be used in technical performance standards and is currently under …

Quantification of carbon nanotubes in environmental matrices: Current capabilities, case studies, and future improvements

April 6, 2016
Author(s)
Elijah J. Petersen, D. X. Flores-Cervantes, Thomas Bucheli, Lindsay C. Elliott, Jeffrey A. Fagan, Alexander Gogos, Shannon Hanna, Antonio R. Montoro Bustos, Desiree L. Plata, Vytautas Reipa, Paul Westerhoff, Michael R. Winchester, Elisabeth Mansfield
… As such, quantitative measurements of CNTs in key environmental matrices (water, soil, sediment, and … methods for CNT quantification are not yet available. In this paper, we systematically and critically review each … laboratory. Overall, substantial progress has been made in improving CNT quantification during the past ten years, …

Adsorption, X-ray Diffraction, Photoelectron, and Atomic Emission Spectroscopy Benchmark Studies for the Eighth Industrial Fluid Properties Simulation Challenge

January 31, 2016
Author(s)
Daniel Siderius, Vincent K. Shen, Raymond D. Mountain, Richard B. Ross, David B. Aeschliman, Riaz Ahmad, John K. Brennan, Myles L. Brostrom, Kevin A. Frankel, Jonathan D. Moore, Joshua D. Moore, Derrick M. Poirier, Matthias Thommes, Nathan E. Schultz, Kenneth D. Smith
… methods to predict the adsorption of organic adsorbates in activated carbon materials. The challenge focused, in particular, on the adsorption of perfluorohexane in the activated carbon standard BAM-P109 [1]. Entrants were … Adsorption Science & Technology …

The Eighth Industrial Fluid Properties Simulation Challenge

January 31, 2016
Author(s)
Daniel Siderius, Vincent K. Shen, Raymond D. Mountain, Nathan E. Schultz, Riaz Ahmad, John K. Brennan, Kevin A. Frankel, Jonathan D. Moore, Richard B. Ross, Matthias Thommes, Kenneth D. Smith
… methods to predict the adsorption of organic adsorbates in activated carbon materials. In particular, the eighth challenge focused on the adsorption of perfluorohexane in the activated carbon BAM-109. Entrants were challenged to … Adsorption Science & Technology …

Practical limitations of aerosol separation by a tandem differential mobility analyzeraerosol particle mass analyzer

January 4, 2016
Author(s)
James G. Radney, Christopher D. Zangmeister
… particle counter were used to investigate the limitations in the separation of singly and multiply charged aerosol … affects the isolation of the singly charged particles. In cases where the DMA?APM was unable to fully resolve the … the peak mass deviated by up to 13% leading to errors in the mass specific extinction cross section of over 100%. …

Polyester composite water uptake and organic contaminant release affected by carbon nanofiber reinforcements

January 1, 2016
Author(s)
Aaron Forster, Maryam Salehi, Kuang-Ting Hsiao, Andrew J. Whelton
… to a polyester only sample. Specimens were immersed in water for 30 days under nominal pressure at 23 °C, below … of water chemistry which is similar to exposures in flowing systems. Composite mass and water quality were … reduced water absorption due to the reduction in the resin volume fraction in the composite. The addition …

Urinary iodine and stable isotope analysis to examine habitat influences on thyroid hormones among coastal dwelling American alligators

December 9, 2015
Author(s)
Ashley S. Boggs-Russell, Heather J. Hamlin, James C. Nifong, Brittany L. Kassim, Russell H. Lowers, Thomas M. Galligan, Stephen E. Long, Louis J. Guillette Jr.
… alligator, a freshwater species, is known to forage in marine environments which could lead to increased dietary … hormones. Alligators under 135 SVL exhibited seasonality in thyroid hormones and a positive relationship between UI … Both techniques demonstrate that adult alligators in coastal environments are utilizing estuarine/marine …

Quantification of Nanoparticle Release from Polymer Nanocomposite Coatings due to Environmental Stressing

December 8, 2015
Author(s)
Yeon S. Kim, Nasir M. Uddin, Marc R. Nyden, Richard H. Harris Jr., Savelas A. Rabb, Rick D. Davis
… (ENP) reduce the flammability of components used in soft furnishings (mattresses and upholstered furniture). … basis for assessing their health and environmental impact. In this manuscript, we report on our efforts to identify … applied to the surfaces of BF and PUF. The ENPs released in simulated chewing and mechanical stressing experiments …

Applications of the Spline Filter for Areal Filtration

November 4, 2015
Author(s)
D Ott, Hao H. Zhang, Daniel B. Ott, Wei Chu, Jun-Feng Song
… which replace the first order finite difference in the traditional spline formulation. These improvements … surfaces and extend the applications of the spline filter in areal filtration. … Measurement Science & Technology …

The Fiber Break Evolution Process in a 2-D Epoxy/Glass Multi-Fiber Array

November 2, 2015
Author(s)
Edward D. McCarthy, Jae H. Kim, N. Alan Heckert, Stefan D. Leigh, Jeffrey W. Gilman, Gale A. Holmes
… at the critical fragment length. Because the IFSS is used in unidirectional composite models to predict strength and … of a single isolated fiber has often been questioned. In this paper, the spatial distribution of fiber breaks in a 2-D array of glass fibers is compared with break …

Abiotic bromination of soil organic matter

October 15, 2015
Author(s)
Bruce D. Ravel, Alessandra C. Leri
… One such reaction is halogenation, which occurs naturally in the soil environment and has been associated with … that naturally produced organobromine is ubiquitous in SOM, we hypothesized that inorganic bromide could be subject to abiotic oxidations resulting in bromination of SOM. Through lab-based degradation …
Displaying 4576 - 4600 of 13217
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