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Impact of and correction for instrument sensitivity drift on nanoparticle size measurements by single-particle ICP-MS

February 8, 2016

Author(s)

Hind El Hadri, Elijah Petersen, Michael R. Winchester

Engineered nanomaterials (ENMs) are already incorporated into numerous consumer products, and increasing product applications are expected in future years. To enable an understanding of potential risks associated with these products, it is important to

Quantitative EXAFS Analysis

February 1, 2016

Author(s)

Bruce D. Ravel

Dioctyl sodium sulfosuccinate (DOSS; CAS #577-11-7) a major component of the dispersant COREXIT is an obesogen

January 20, 2016

Author(s)

Alexis M. Temkin, Robert R. Bowers, Margaret E. Magaletta, Steven Holshouser, Adriana Maggi, Paolo Ciana, Louis J. Guillette Jr., John Bowden, John E. Baatz, Demetri D. Spyropoulos, John Kucklick

Background: Product safety testing typically involves lethal toxicity assessments, which likely miss long- term health impacts. Optimizing long-term product safety is critical for widespread chemical use. The obesity epidemic exemplifies a condition based

Precision Interferometric Measurement of Mirror Birefringence in High-Finesse Optical Resonators

January 19, 2016

Author(s)

Adam J. Fleisher, David A. Long, Qingnan Liu, Joseph T. Hodges

High-finesse optical resonators found in ultrasensitive laser spectrometers utilize supermirrors ideally consisting of isotropic high-reflectivity coatings with power reflectivity $R\geq99.99\%$. Strictly speaking, however, the optical coatings are often

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

A cavity ring-down spectrometer and condensation particle counter were used to investigate the limitations in the separation of singly and multiply charged aerosol particles by a tandem differential mobility analyzer (DMA) and aerosol particle mass

Organohalogen contaminants and vitamins in Northern Fur Seals (Callorhinus ursinus) collected during subsistence hunts in Alaska

January 1, 2016

Author(s)

Jessica L. Reiner, Paul R. Becker, Jennifer M. Lynch, Amanda J. Moors, Jennifer M. Ness, Rebecca S. Pugh, Catherine A. Rimmer, John R. Kucklick, Matthew O. Gribble, Danielle Peterson, Jody Rhoderick, Jennifer Trevillian

During native subsistence hunts from 1987 to 2007, blubber and liver samples from 50 subadult male northern fur seals (Callorhinus ursinus) were collected on St. Paul Island, Alaska. Samples were analyzed for legacy persistent organic pollutants (POPs)

Trace element concentrations in liver of 16 species of cetaceans stranded on Pacific Islands from 1997 through 2013

January 1, 2016

Author(s)

Angela M. Hansen, Colleen E. Bryan Sallee, Kristi West, Brenda Jensen

The impacts of anthropogenic contaminants on marine ecosystems are a concern worldwide. Anthropogenic activities can enrich trace elements in marine biota to concentrations that may negatively impact organism health. Exposure to elevated concentrations of

UV-assisted room-temperature chemiresistive NO2 sensor based on TiO2 thin film

December 24, 2015

Author(s)

Ting Xie, Nichole Sullivan, Kristen L. Steffens, Baomei Wen, Guannan Liu, Ratan K. Debnath, Albert Davydov, Romel D. Gomez, Abhishek Motayed

TiO2 thin film based, chemiresistive sensors for NO2 gas which operate at room temperature under ultraviolet (UV) illumination have been demonstrated in this work. The rf-sputter deposited and post-annealed TiO2 thin films have been characterized by atomic

Interlaboratory Analytical Comparison Study of Total Fatty Acid Concentrations in Human Serum: Results for Exercise 02: QA15FASER02

December 22, 2015

Author(s)

Michele M. Schantz

The National Institute of Standards and Technology (NIST), in conjunction with the Centers for Disease Control and Prevention (CDC) and NIHs Office of Dietary Supplements (ODS), initiated a second interlaboratory analytical comparison study of total fatty

Beam-Scanning for Rapid Coherent Raman Hyperspectral Imaging

December 14, 2015

Author(s)

Seungwan Ryu, Charles Camp, Ying Jin, Marcus T. Cicerone, Young Jong Lee

Coherent Raman imaging requires high peak power laser pulses to maximize the nonlinear multiphoton signal generation, but accompanying photo-induced sample damage often poses a challenge to microscopic imaging studies. We demonstrate that a beam-scanning

Chloride Incorporation Process in CH3NH3PbI3-xClx Perovskites via Nanoscale Bandgap Maps

December 9, 2015

Author(s)

Jungseok Chae, Qingfeng Dong, Jinsong Huang, Andrea Centrone

CH3NH3PbI3-xClx perovskites enable fabrication of highly efficient solar cells. Chloride ions benefit the morphology, carrier diffusion length and stability of perovskite films; however, whether those benefits stem from the presence of Cl- in the precursor

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.

The American alligator, a freshwater species, is known to forage in marine environments which could lead to increased dietary uptake of iodine, a nutrient necessary for the production of thyroid hormones. To explore the influence of dietary iodine on

Field Portable Low Temperature Porous Layer Open Tubular Cryoadsorption Headspace Sampling and Analysis Part II: Applications

December 8, 2015

Author(s)

Thomas J. Bruno, Jessica Nichols

In previous work, dynamic headspace vapor collection on short, porous layer open tubular (PLOT) capillary columns maintained at low temperature was introduced. In this paper, we extend this approach with the introduction of a small in situ pyrolysis

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