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Search Publications

NIST Authors in Bold

Displaying 6576 - 6600 of 73697

Surveying the vampire bat (Desmodus rotundus) serum proteome: a resource for identifying immunological proteins and detecting pathogens

April 10, 2021
Author(s)
Ben Neely, Michael G. Janech, Alison Bland, Brock Fenton, Nancy B. Simmons, Daniel J. Becker
Bats (Order: Chiroptera) are increasingly studied as model systems for longevity and for their ability to seemingly tolerate typically virulent viruses without showing clinical disease. Yet our ability to characterize immune mechanisms of viral tolerance

Flourescently labeled cellulose nanofibers for environmental health and safety studies

April 9, 2021
Author(s)
Jeremiah Woodcock, Ilabahen A. Patel, Ryan Beams, Stephan J. Stranick, Jeffrey W. Gilman, Douglas M. Fox, Marina Mulenos, Christie Sayes, Maryam Salari, Deloid Glen, Philip Demokritou, Bryan Harper, Harper Stacey, Ong Kimberly, Jo Anne Shatkin
An optimal methodology for locating and tracking cellulose nanofibers (CNF) in vitro and in vivo is crucial to evaluate the environmental health and safety properties of these nanomaterials. Here, we report the use of a new boron-dipyrromethene (BODIPY)

Characterization and suppression of background light shifts in an optical lattice clock

April 8, 2021
Author(s)
Robert J. Fasano, Yun Jhih Chen, Will McGrew, Wesley Brand, Richard W. Fox, Andrew Ludlow
Experiments involving optical traps often require precise control of the ac Stark shifts induced by strong confining light fields. By carefully balancing light shifts between two atomic states of interest, optical traps at the magic wavelength have been

Intermediate Scattering Functions of a Rigid Body Monoclonal Antibody Protein in Solution Studied by Dissipative Particle Dynamic Simulation

April 8, 2021
Author(s)
Yanqin Zhai, Nicos Martys, William L. George, Joseph E. Curtis, Jannatun Nayem, Y. Z, Yun Liu
In the past decade, there is increased research interest in studying internal motions of flexible proteins in solution using Neutron Spin Echo (NSE) as NSE can simultaneously probe the dynamics at the length and time scale comparable to protein domain

Review of Research on the Fire Behavior of Simple Shear Connections

April 8, 2021
Author(s)
Erica Fischer, Rachel Chicchi, Lisa Choe
Previous building fires and research has shown that simple (shear) connections develop large axial force and flexural demands during a fire leading to potential failure of the connections and progressive collapse of a building. These findings have

Single-Zone Simulations Using FaTIMA for Reducing Aerosol Exposure in Educational Spaces

April 8, 2021
Author(s)
Lisa Ng, Dustin Poppendieck, Brian Polidoro, William Stuart Dols, Steven Emmerich, Andrew K. Persily
On March 11, 2020, the World Health Organization declared the novel coronavirus (COVID-19) outbreak a global pandemic. Following this announcement, school closures around the United States began, and starting in June 2020, many schools decided to reopen

Gamma and Decay Energy Spectroscopy Measurements of Trinitite

April 7, 2021
Author(s)
David Mercer, Katrina Koehler, Mark Croce, Andrew Hoover, Philip Hypes, Stosh Kozimor, Veronika Mocko, Paul Saey, Dan Schmidt, Joel Ullom
We report gamma ray spectroscopy measurements of trinitite samples and analogous samples obtained from detonation sites in Nevada and Semipalatinsk, as well as in situ measurements of topsoil at the Trinity site. We also report the first isotopic

Membrane transporter dimerization driven by differential lipid solvation energetics of dissociated and associated states

April 7, 2021
Author(s)
Rahul Chadda, Nathan Bernhardt, Elizabeth Kelley, Susana Marujo Teixeira, Kacie Griffith, Alejandro Gil-Ley, Tugba Ozturk, Lauren Hughes, Ana Forsythe, Venkatramanan Krishnamani, Jose Faraldo-Gomez, Janice Robertson
Over two-thirds of integral membrane proteins of known structure assemble into oligomers. Yet, the forces that drive the association of these proteins remain to be delineated, as the lipid bilayer is a solvent environment that is both structurally and

The NIH Somatic Cell Genome Editing program

April 7, 2021
Author(s)
Samantha Maragh
The move from reading to writing the human genome offers new opportunities to improve human health. The United States National Institutes of Health (NIH) Somatic Cell Genome Editing (SCGE) Consortium aims to accelerate the development of safer and more

Characterization of extracellular vesicles and artificial nanoparticles with four orthogonal single-particle analysis platforms

April 6, 2021
Author(s)
Emily Mallick, Tanina Arab, Yiyao Huang, Liang Dong, Zhaohao Liao, Zezhou Zhao, Barbara Smith, Norman J. Haughey, Kenneth Pienta, Barbara Slusher, Patrick Tarwater, Juan Pablo Tosar, Angela M. Zivkovic, Wyatt Vreeland, Michael E. Paulaitis, Kenneth W. Witwer
We compared four orthogonal technologies for sizing, counting, and phenotyping of extracellular vesicles (EVs) and synthetic particles. The platforms were: single-particle interferometric reflectance imaging sensing (SP-IRIS) with fluorescence

Characterizing LTE User Equipment Emissions Under Closed-Loop Power Control

April 6, 2021
Author(s)
Jason Coder, Aric Sanders, Michael R. Frey, Adam Wunderlich, Azizollah Kord, Jolene Splett, Lucas N. Koepke, Daniel Kuester, Duncan McGillivray, John M. Ladbury
This report presents a laboratory-based characterization of Long Term Evolution (LTE) User Equipment (UE) emissions under closed-loop power control, building on our prior work (NIST TN 2069), which assessed the impact of a large number of factors affecting

Evaluations of a Detector-Limited Digital Impedance Bridge

April 6, 2021
Author(s)
Mona Feige, Stephan Schlamminger, Yicheng Wang
We tested a simple digital impedance bridge using two nominally equal resistors to form a 1:1 ratio. We focused on resolution and stability of the detectors. Fluctuations of the source voltages were largely removed through postprocessing of the digitized

UE-to-Network Relay Model B Discovery in ProSe-Enabled LTE Networks

April 6, 2021
Author(s)
Alexandre C. Moreaux, Samantha Gamboa Quintiliani, David W. Griffith, Richard A. Rouil
In this paper, we expand previous analytical models to offer a more complete representation of Model B ProSe direct discovery. Using these models, we can obtain performance metrics such as the average time a given Remote User Equipment (UE) takes to

Accurate Gain Measurement Technique for Limited Antenna Separations

April 5, 2021
Author(s)
Ben Jamroz, Antonius van den Biggelaar, S J. Geluk, Dylan Williams, A. B. Smolders, U. Johannsen, Laurens A. Bronckers
The Friis equation is often used to determine the gain of antennas but assumes that far-field (FF) conditions are met. For limited antenna separations on the order of the Fraunhofer distance, its use requires a precise estimate of the amplitude centers of

CCM pilot study overview: geometrical measurement of the Rockwell diamond indenter

April 5, 2021
Author(s)
Renato R. Machado, Samuel Low, Alessandro Germak
This paper describes an overview of the capability of the NMIs that participated on the CCM Pilot Study measurement systems, conducted by the CIPM/CCM/Working Group on Hardness, to characterize the Rockwell hardness diamond indenter geometry, by measuring

Estimations of the effective Young's modulus of specimens prepared by fused filament fabrication

April 5, 2021
Author(s)
Lichen Fang, Yishu Yan, Ojaswi Agarwal, Jonathan Seppala, Kalman D. Migler, Thao D. Nguyen, Kevin Hemker, Sung Hoon Kang
The elastic response of homogeneous isotropic materials is most commonly represented by their Young's modulus (E), but geometric variability associated with additive manufacturing results in materials that are neither homogeneous nor isotropic. Here we
Displaying 6576 - 6600 of 73697
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