U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Publications

NIST Authors in Bold

Displaying 1901 - 1925 of 143797

Recommendations for setting a criterion and assessing commutability of sample materials used in external quality assessment/proficiency testing schemes

November 2, 2023
Author(s)
Sverre Sandberg, Pernille Fauskanger, Jesper Johansen, Thomas Keller, Jeffrey Budd, Neil Greenberg, robert rej, MAURO PANTEGHINI, VINCENT DELATOUR, Ferruccio Ceriotti, Liesbet Deprez, Johanna Camara, Finlay MacKenzie, Alicia Lyle, Eline van der Hagen, Chris Burns, W. Greg Miller
It is important for external quality assessment materials (EQAMs) to be commutable with clinical samples; i.e., they should behave like clinical samples when measured using end-user clinical laboratory in vitro diagnostic medical devices (IVD-MDs). Using

Watching (De)Intercalation of 2D Metals in Epitaxial Graphene: Insight into the Role of Defects

November 2, 2023
Author(s)
Falk Niefind, Qian Mao, Nadire Nayir, Malgorzata Kowalik, Jungjoon Ahn, Andrew Winchester, Chengye Dong, RINU ABRAHAM MANIYARA, Joshua A. Robinson, Adri van Duin, Sujitra Pookpanratana
The de-intercalation processes of 2D Ag and 2D Ga from the graphene-SiC interface was tracked using full-field photoemission electron microscopy. The intercalation "windows" are observed in both systems and follow very different dynamics. The de- and re

A Review of UTe2 at High Magnetic Fields

November 1, 2023
Author(s)
Sylvia Lewin, Corey Frank, Sheng Ran, Johnpierre Paglione, Nicholas Butch
ranium ditelluride (UTe2) is recognized as a host material to unconventional spin-triplet superconductivity, but it also exhibits a wealth of additional unusual behavior at high magnetic fields. One of the most prominent signatures of the unconventional

Dietary Supplement Laboratory Quality Assurance Program: Exercise 1 Final Report

November 1, 2023
Author(s)
Carolyn Burdette, Hugh Hayes, Jenna Klingsick, Colleen E. Bryan Sallee, Charles Barber, Steven J. Christopher, Lee L. Yu
The DSQAP was launched, in collaboration with the NIH ODS, in 2007. The program was established to enable laboratories to improve the accuracy of measurements in samples for nutrients, marker compounds, toxic elements, and/or contaminants in dietary

Divalent ions as mediators of carbonylation in cardiac myosin binding protein C

November 1, 2023
Author(s)
Christina Bergonzo, Baikuntha Aryal, Ashutosh Rao
The dosing and efficacy of chemotherapeutic drugs can be limited by toxicity caused by off-pathway reactions. One hypothesis for how such toxicity arises is via metal-catalyzed oxidative damage of cardiac myosin binding protein C (cMyBP-C) found in cardiac

NIST SI Units Card Deck

November 1, 2023
Author(s)
Dinelka Jagoda, Elizabeth Benham
Welcome to the SI Units Card Deck! This interactive educational activity offers a fun way for students to enhance their understanding of the International System of Units (SI), including the Defining Constants, Base Units, Derived Units with Special Names

Superconducting X-ray Sensors for Tomography of Microelectronics

November 1, 2023
Author(s)
Joseph Fowler, Zachary H. Levine, Paul Szypryt, Daniel Swetz
Tomographic imaging of integrated circuits at scales smaller than 1 micrometer is a challenging x-ray measurement. We describe a research instrument based upon superconducting x-ray microcalorimeters, which help to discriminate among materials in a sample

Synthesis, Structure and Canted Antiferromagnetism of Layered Cobalt Hydroxide Sorbate

November 1, 2023
Author(s)
Jonathan B. Lefton, Wenhao Liu, Claire Lamberti, Bing Lv, Craig Brown, Ryan Klein, Tom Runcevski
Layered hybrid organic–inorganic compounds of the transition metal hydroxides, in which part of the hydroxide ions are exchanged for organic ligands that act as spacers of the 2-dimensional inorganic layers, elicit new or enhanced properties. The

A model for partially dependent component damage fragilities in seismic risk analysis

October 31, 2023
Author(s)
Jack Baker, Edward Almeter, Dustin Cook, ABBIE LIEL, Curt Haselton
This paper proposes a model to quantify dependencies in component damage in the FEMA P-58 seismic performance assessment methodology, and to simulate damage realizations with the desired dependencies. The model is compatible with the prior FEMA P-58

High-Pressure Vapor-Liquid Equilibrium Measurements of Methane + Water Mixtures by Nuclear Magnetic Resonance Spectroscopy

October 31, 2023
Author(s)
Samantha Miller, Chris Suiter, Mark O. McLinden, Jason A. Widegren, Nancy Levinger, Bret Windom, Michael Sartini
Accurate vapor-liquid equilibrium (VLE) data are required to predict the condensation of low-volatility components in natural gas pipelines. Here we apply 1H nuclear magnetic resonance (NMR) spectroscopy to measure the VLE of methane + water mixtures at

Modeling of hierarchical solidification microstructures in metal additive manufacturing: Challenges and opportunities

October 31, 2023
Author(s)
Dilip K. Banerjee, Supriyo Ghosh, Julien Zollinger, Miha Zaloznik, Christopher Newman, Raymundo Arroyave
Metal-based additive manufacturing (AM) processes often produce parts with improved properties compared to conventional manufacturing and metal working routes. However, currently, only a few alloys can be reliably additively manufactured as the vast

Superconducting Nanowire Single-Photon Detector Arrays for the Near- to Mid-Infrared

October 31, 2023
Author(s)
Benedikt Hampel, Richard Mirin, Sae Woo Nam, Varun Verma
Superconducting Nanowire Single-Photon Detectors (SNSPDs) are excellent devices for the analysis of faint light from the ultraviolet to the mid-infrared. Recent developments push their broad wavelength bandwidth further into the mid-infrared towards 20 μm

Nanosecond time-resolved dual-comb absorption spectroscopy

October 30, 2023
Author(s)
David Long, Matthew Cich, Carl Mathurin, Garrett Mathews, Adam Heiniger, Augustine Frymire, Gregory Rieker
Frequency combs have revolutionized the field of optical spectroscopy, enabling researchers to probe molecular systems with a multitude of accurate and precise optical frequencies. Although there have been tremendous strides in direct frequency comb

Effects of Glycans and Hinge on Dynamics in the IgG1 Fc

October 28, 2023
Author(s)
Christina Bergonzo, J. Todd Hoopes, Zvi Kelman, David Travis Gallagher
The crystallizable fragment (Fc) domain of immunoglobulin subclass IgG1 antibodies is engineered for a wide variety of pharmaceutical applications. Two important structural variables in Fc constructs are the hinge region connecting the Fc to the antigen

Monoclonal Antibodies as SARS-CoV-2 Serology Standards: Experimental Validation and Broader Implications for Correlates of Protection

October 28, 2023
Author(s)
Lili Wang, Paul Patrone, Anthony Kearsley, Jerilyn Izac, Adolfas Gaigalas, John Prostko, Hang Xie, Linhua Tian, Elzafir Elsheikh, Edward Kwee, Troy Kemp, Simon Jochum, Natalie Thornburg, Clifford McDonald, Adi Gundlapalli, Sheng Lin-Gibson
COVID-19 has highlighted the need for more accurate and reproducible measurements of humoral immunity, including antibody levels and neutralization potential, which are critical for diagnostics, seroprevalence estimates, and development of vaccines and
Displaying 1901 - 1925 of 143797
Was this page helpful?