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Displaying 26 - 50 of 442

Facile fabrication and characterization of kraft lignin@Fe3O4 nanocomposites using pH driven precipitation: effects on increasing lignin content

April 1, 2021
Frankie A. Petrie, Justin Gorham, Robert T. Busch, Serhiy O. Leontsev, Esteban E. Urena-Benavides, Erick S. Vasquez
Kraft lignin@Fe3O4 multicore nanocomposites fabrication proceeded using a simple pH-driven precipitation technique. An alkaline solution for kraft lignin (pH 12) was rapidly injected into an aqueous-based magnetite (Fe3O4) nanoparticle colloidal suspension

Synthesis, Structural and Sorption Characterization of a Hofmann Compound, Ni(3-Methy-4,4'-bipyridine)[Ni(CN)4]

March 6, 2021
Winnie Wong-Ng, Jeffrey T. Culp, Daniel Siderius, Yu-Sheng Chen, S. Y. G. Wang, Andrew J. Allen, Eric J. Cockayne
Crystal structure of the guest-free Ni(CN)4-based metal organic framework Ni(3-Methy-4,4'-bipyridine)[Ni(CN)4] (nicknamed Ni-BpyMe(A)), was determined to be orthorhombic, Pmma, a= 12.6025(4) Å, b=7.3324(3) Å, c=11.3095(4) Å, V=1045.07 (2) Å3 and Z=2

National Institute of Standards and Technology Environmental Scan 2020

February 9, 2021
Heather Evans, Kristen K. Greene, William M. Healy, Elizabeth Hoffman, Kate Rimmer, Anna V. Sberegaeva, Neil M. Zimmerman
The 2020 National Institute of Standards and Technology Environmental Scan provides an analysis of key external factors that could impact NIST and the fulfillment of its mission in coming years. The analyses were conducted through four separate lenses

Study of the Reactions of OH with HCl, HBr, and HI between 298 K and 460 K.

November 25, 2020
Vladimir L. Orkin, Victor Khamaganov, Igor Larin
The reactions between OH radicals and hydrogen halides (HCl, HBr, HI) have been studied between 298 K to 460 K by using a discharge flow – electron paramagnetic resonance technique. The rate constants at room temperature were found to be kHCl(298 K) = (7.9

Characterization of Long-Term Sub-Hourly Thermal Comfort Performance Data

November 1, 2020
Hyojin Kim, Lisa Ng, Brian P. Dougherty, William V. Payne
Current thermal comfort standards do not provide guidelines on how to graphically characterize and benchmark long-term, sub-hourly, thermal comfort. In an effort to address this void, several statistical characterizations and advanced visualization methods


October 16, 2020
Katherine Shaw, Jennifer Lynch, George H. Balazs, T. T. Jones, Jeff Pawloski, Marc Rice, Amanda French, Jing Liu, David Klein
Hawaiian green sea turtles (Chelonia mydas) are exposed to trace elements through water, sediment, and food. High concentrations of elements have been shown to decrease immune function, impair growth, and decrease reproduction in wildlife. This study

Optical and Mechanical Design of a Telescope for Lunar Spectral Irradiance Measurements from a High-Altitude Aircraft

September 8, 2020
Clarence Zarobila, Steven Grantham, Steven W. Brown, John T. Woodward IV, Stephen Maxwell, Dana R. Defibaugh, Thomas C. Larason, Kevin Turpie
We have designed a non-imaging telescope for measurement of the spectral irradiance of the moon. The telescope was integrated into a wing pod of a NASA ER-2 research aircraft to measure lunar spectral irradiance during flight. The telescope and support

Niche partitioning of microbial communities at an ancient vitrified hillfort: implications for vitrified radioactive waste disposal

August 31, 2020
Jamie L. Weaver, Andrew Plymale, Jacqueline Wells, Carolyn I. Pearce, Colin Brislawn, Emily Graham, Tanya Cheeke, Jessica Allen, Vincent Danna, Kimberly Tyrrell, Rolf Sjoblom, Edward Vicenzi, John McCloy, Eva Hj?rthner-Holdar, Erik Ogenhall, Mia Englund, David Peeler, Albert Kruger, Rick L. Paul
A pre-Viking era vitrified hillfort, Broborg, provides a habitat analogue for disposed radioactive waste glass and shows strong niche partitioning among the organisms involved in glass alteration. Microbes cannot be eliminated from radioactive waste

Evaluation of Thermal Optical Analysis (TOA) Using an Aqueous Binary Mixture

June 30, 2020
Courtney D. Grimes, Joseph Conny, Russell Dickerson
Thermal Optical Analysis (TOA), a commonly implemented technique used to measure the amount of particulate carbon in the atmosphere or deposited on a filter substrate, distinguishes organic carbon (OC) from elemental carbon (EC) through the monitoring of

Simultaneous Transmission and Absorption Photometry of particle-laden filters from Wildland Fires during the Biomass Burning Observation Project (BBOP) field campaign

June 20, 2020
Cary Presser, Ashot Nazarian, Duli Chand, Arthur Sedlacek, John Hubbe
Transmissivity and absorptivity measurements were carried out simultaneously in the visible (wavelength of 532 nm) at laboratory conditions using particle-laden filters obtained from a three-wavelength particle/soot absorption photometer (PSAP). The

New Insights into Female Humpback Whale (Megaptera novaeangliae) Reproductive Endocrinology Revealed by Steroid Hormone Profile Analysis

February 20, 2020
Greta Dalle Luche, Ashley Russell, John Kucklick, Jasmin Gross, Darryl Hawker, Susan Bengston Nash
The blubber steroid hormone profiles of 52 female humpback whales migrating along the east coast of Australia were investigated for possible seasonal endocrinological changes associated with reproduction. Individuals were randomly sampled in southeast

Blubber steroid hormone profiles as indicators of physiological state in free-ranging common bottlenose dolphins (Tursiops truncatus)

January 1, 2020
Thomas M. Galligan, Ashley Russell, Brian C. Balmer, Teresa Rowles, Cynthia Smith, Forrest Townsend, Randall Wells, Nicholas Kellar, Eric Zolman, Lori Schwacke
Assessing endocrine health in free-ranging marine mammals can be difficult due to limited access to blood samples, which is the most commonly used sample matrix for endocrine assessment in wildlife. Blubber contains steroid hormones and can be collected

Measurement of Airborne Emissions from Extinguished Cigarettes: Final Report

December 16, 2019
Dustin G. Poppendieck
Three series of experiments were conducted in this study. First, studies were performed to the determine the relative distributions of the target chemicals in freshly smoked butts by analyzing six types of samples consisting of different parts of the butts

Prey-size plastics are invading larval fish nurseries

November 11, 2019
Jamison Gove, Jonathan Whitney, Margaret McManus, Joey Lecky, Felipe Carvalho, Jennifer Lynch, Jiwei Li, Philipp Neubauer, Jana Phipps, Donald Kobayashi, Karla Balagso, Emily Contreras, Mark Manuel, Mark Merrifield, Jeffrey Polovina, Gregory Asner, Jeffrey Maynard, Gareth Williams
Life for many of the world's marine fish begins at the ocean surface. Ocean conditions dictate food availability and govern survivorship, yet little is known about the habitat preferences of larval fish during this highly vulnerable life-history stage

Estimating real-time infiltration for use in residential ventilation control

September 19, 2019
Lisa C. Ng, Stephen M. Zimmerman, Jeremy Good, Brian Toll, Steven J. Emmerich, Andrew K. Persily
Minimum outdoor air ventilation rates specified in standards such as ASHRAE Standard 62.2 are generally based on envelope airtightness, building floor area, geographical location, and number of occupants. ASHRAE Standard 62.2 allows for a constant

AMAP Review: Biological Effects from Contaminants on Arctic Wildlife and Fish

August 13, 2019
Rune Dietz, Robert Letcher, Colleen E. Bryan Sallee, John Kucklick, Stacy Schuur, Jean-Pierre Desforges, Igor Eulaers, Bjorn Munro Jenssen, Melissa McKinney, Christian Sonne, Niladri Basu, Simon Wilson, Sara Pedro, Jenny Bytingsvik, Garry Stenson, Anuschka Polder, Joshua T. Ackerman, Collin A. Eagles-Smith, Mark P. Herzog, Alex Hartman, Sarah Peterson, Allyson Jackson, Birgit Braune, Derek Muir, Frank Riget, Milton Levin, Anders Bignert, Maria Dam, Marlene Evans, Magali Houde, Katrin S. Hoydal
Since the last Arctic Monitoring and Assessment Programme (AMAP) effort to review biological effects of the exposure to persistent organic pollutants (POPs) classified as organohalogen compounds (OHCs) in Arctic biota there has been a considerable number
Displaying 26 - 50 of 442