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Displaying 51 - 75 of 74397

Measuring the Influence of CO2 and Water Vapor on the Dynamics in Polyethylenimine To Understand the Direct Air Capture of CO2 from the Environment

June 5, 2024
Author(s)
Avery Baumann, Takeshi Yamada, Kanae Ito, Chad R. Snyder, John Hoffman, Craig Brown, Christopher Stafford, Christopher Soles
Aminopolymer sorbents are leading candidates for extracting CO2 directly from the atmosphere under ambient conditions. For effective carbon capture, this requires not only that the CO2 actively binds with amine groups of the polymer under low gas

NIST Greenhouse Gas Measurements Program: A Decade of Critical Accomplishments

June 5, 2024
Author(s)
James Whetstone, Tamae Wong, Hratch Semerjian
At COP 21 (Paris), there was general agreement that programs to reduce greenhouse gas emissions and mitigate atmospheric warming will require an understanding of existing emissions as well as programs to monitor, report, and verify emissions from a broad

Research on Fixture-Level Peak Probability of Water Use in Commercial Buildings

June 5, 2024
Author(s)
Tao Li, Steven Buchberger, Toritseju Omaghomi, Gary Klein, William M. Healy
novel wireless sensor network is developed and demonstrated for monitoring indoor fixture level water use in buildings. The new technology consists of a low-cost, battery-powered, miniature wireless sensor module for non-invasive detection of flow through

Comprehensive Overview of Bottom-Up Proteomics using Mass Spectrometry

June 4, 2024
Author(s)
Yuming Jiang, Devasahayam Rex, Dina Schuster, Ben Neely, German Rosano, Norbert Volkmar, Amanda Momenzadeh, Trenton Peters-Clarke, Susan Egbert, Simion Kreimer, Emma Doud, Oliver Cook, Amit Yadav, Muralidharan Vanuopadath, Martin Mayta, Anna Duboff, Nicholas Riley, Robert Moritz, Jesse Meyer
Proteomics is the large scale study of protein structure and function from biological systems through protein identification and quantification. "Shotgun proteomics" or "bottom-up proteomics" is the prevailing strategy, in which proteins are hydrolyzed

Standards and Performance Metrics for On-Road Automated Vehicles

June 4, 2024
Author(s)
Craig I. Schlenoff, Zeid Kootbally, Prem Rachakonda, Suzanne Lightman, Apostol Vassilev, David A. Wollman, Edward Griffor
On September 5–8, 2023, the National Institute of Standards and Technology (NIST) held the second Standards and Performance Metrics for On‐Road Automated Vehicles Workshop. This four‐day virtual event provided updates on NIST's recent work in automated

Water-Enhanced CO2 Capture with Molecular Salt Sodium Guanidinate

June 4, 2024
Author(s)
Hayden Evans, Marcus Carter, Wei Zhou, Taner N. Yildirim, Craig Brown, Hui Wu
Solid-state amine absorbent materials, including those containing guanidine derivatives, have received tremendous attention as the world combats the challenges of climate change. Although these materials are attractive for their selective CO2 capture

A Critical Analysis of Circular Product Attributes and Limitations of Product Circularity Assessment Methods

May 29, 2024
Author(s)
Junwon Ko, Gisele Bortolaz Guedes, Fazleena Badurdeen, I.S. Jawahir, KC Morris, Vincenzo Ferrero, Buddhika Hapuwatte, Ryan Bradley, Ardeshir Mashhadi
The Circular Economy (CE) has been proposed as a strategy to promote the efficient use of resources, maximizing the benefits derived from materials and products through value recovery strategies, and minimizing waste generation. However, ambiguity remains

Advancing Methodologies for Hurricane Disaster Research Using Social Media Data

May 29, 2024
Author(s)
Emina Herovic, Caerwyn Hartten, Emily Walpole, Katherine Johnson, Cameron Busser
The National Institute of Standards and Technology's (NIST) investigations of disasters and failures that affect the United States including devastating hurricanes like Hurricane Maria (NIST, 2023), require the assessment of risk communication, especially

Identification of Candidate Protein Biomarkers Associated with Domoic Acid Toxicosis in Cerebrospinal Fluid of California Sea Lions (Zalophus californianus)

May 28, 2024
Author(s)
Gautam Ghosh, Ben Neely, Alison Bland, Emily Whitmer, Cara Field, Padraig Duignan, Michael Janech
Since 1998, California sea lion (Zalophus californianus) stranding events associated with domoic acid toxicosis have consistently increased. Currently there are no practical non-lethal clinical tests for the diagnosis of domoic acid toxicosis (DAT) that

Optical n(p, T_90) measurement suite 2: H_2O and D_2O

May 28, 2024
Author(s)
Patrick Egan, Yuanchao Yang
A suite of measurements of refractive index n(p, T_90) is reported for gas phase ordinary water H_2O and heavy water D_2O. The methodology is optical refractive index gas metrology, operating at laser wavelength 633 nm and covering the range (293 T_90 43

Fiber-coupled 2 mL vacuum-gap Fabry-Perot reference cavity for laser stabilization

May 25, 2024
Author(s)
Charles McLemore, Naijun Jin, Megan Kelleher, Yizhi Luo, Dahyeon Lee, Yifan Liu, Takuma Nakamura, David Mason, Peter Rakich, Scott Diddams, Franklyn Quinlan
Vacuum-gap Fabry-Perot cavities are indispensable tools for vastly improving the frequency stability of lasers, with applications across a diverse range of scientific and industrial pursuits. However, making these cavity-based laser stabilization systems

Letter to the editor: Unit one is intrusive

May 24, 2024
Author(s)
David W. Flater
The SI brochure's treatment of quantities that it regards as dimensionless, with the associated unit one, requires certain physical quantities to be regarded as simply numbers. The resulting formal system erases the nature of these quantities and excludes

Dual-comb correlation spectroscopy of thermal light

May 23, 2024
Author(s)
Eugene Tsao, Alexander Lind, Connor Fredrick, Ryan Cole, Peter Chang, Kristina Chang, Dahyeon Lee, Matthew Heyrich, Nazanin Hoghooghi, Franklyn Quinlan, Scott Diddams
The detection of light of thermal origin is the principal means by which humanity has learned about our world and the cosmos. In optical astronomy, in particular, direct detection of thermal photons and the resolution of their spectra have enabled

Mixture effects of PFAS on embryonic and larval sheepshead minnows (Cyprinodon variegatus)

May 22, 2024
Author(s)
Philip Tanabe, Peter Key, Katy Chung, Emily Pisarski, Jessica Reiner, Alix Rodowa, Jason Magnuson, Marie DeLorenzo
Per- and polyfluoroalkyl substances (PFAS) are ubiquitous and persistent environmental contaminants originating from many everyday products. Perfluorooctane sulfonic acid (PFOS) and perfluorooctanoic acid (PFOA) are two PFAS that are commonly found at high
Displaying 51 - 75 of 74397