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NIST Authors in Bold

Displaying 10176 - 10200 of 73697

SURVEY OF PEPTIDE QUANTIFICATION METHODS AND THEIR REPRODUCIBILITY COMPARISON: A CASE STUDY USING OXYTOCIN

March 20, 2019
Author(s)
Chensheng Li, Sitaram Bhavaraju, Jeremy Melanson, Andreas Blomgren, Torgny Rundlof, Eric L. Kilpatrick, Timothy Rudd, Yves Aubin, Kevin Grant, Edward Saravolac, Tursun Kerim, William Sherman, Yukari Nakagawa, Sergi Pavon, Tim Weel, Arunima Pola, Dinesh Chalasani, Stephen Walfish, Fouad Atouf
USP's peptide reference standards content is typically determined using an HPLC assay against an external standard for which the purity was determined by a mass balance approach. To explore the use of other analyti-cal methods, the USP Biologics Department

The Design and Development of a Tabletop Kibble Balance at NIST

March 20, 2019
Author(s)
Leon S. Chao, Frank C. Seifert, Darine El Haddad, Stephan Schlamminger
A global paradigm shift to redefine the International System of Units (SI) from a system based on seven fundamental units to seven fundamental constants is well under way. More specifically, the unit of mass, the kilogram, will be realized via a fixed

UV LEDs Based on p-i-n Core-Shell AlGaN/GaN Nanowire Heterostructures Grown by N-polar Selective Area Epitaxy

March 20, 2019
Author(s)
Matthew Brubaker, Kristen Genter, Alexana Roshko, Paul T. Blanchard, Bryan T. Spann, Todd E. Harvey, Kris A. Bertness
Ultraviolet light-emitting diodes (UV LEDs) fabricated from N-polar AlGaN/GaN core-shell nanowires with p-i-n structure produced electroluminescence at 365 nm with 5x higher intensities than similar GaN homojunction LEDs. The improved characteristics were

An Inter-Laboratory Comparative High Throughput Experimental Materials Study of Zn-Sn-Ti-O Thin Films

March 19, 2019
Author(s)
Jason R. Hattrick-Simpers, Zachary T. Trautt, Kamal Choudhary, Aaron G. Kusne, Feng Yi, Martin L. Green, Sara Barron, Andriy Zakutayev, Nam Nguyen, Caleb Phillips, John Perkins, Ichiro Takeuchi, Apurva Mehta
High throughput experimental (HTE) techniques are an increasingly important way to accelerate the rate of materials research and development for many possible applications. However, there are very few publications on the reproducibility of the HTE results

ASTM F48 Formation and Standards for Industrial Exoskeletons and Exosuits

March 19, 2019
Author(s)
William G. Billotte, Brian D. Lowe, Donald R. Peterson
Established in the fall of 2017, ASTM F48 is a technical committee that is addressing the need for standards related to wearable devices that augment, enable, assist, or enhance motion, posture, or physical activity – commonly referred to as “exoskeletons”

Correlating anisotropic mobility and intermolecular phonons in organic semiconductors to investigate transient localization

March 19, 2019
Author(s)
Emily G. Bittle, Adam J. Biacchi, Lisa A. Fredin, Andrew A. Herzing, Thomas C. Allison, Angela R. Hight Walker, David J. Gundlach
Charge transport in organic semiconductors is governed by a mix of polaron hopping and band- like transport mechanisms. The energy of polaron hopping and formation are similar in magnitude to the energies of inter- and intra- molecular modes, which points

Demonstration of Athena X-IFU Compatible 40-Row Time-Division-Multiplexed Readout

March 19, 2019
Author(s)
Malcolm S. Durkin, Joseph S. Adams, Simon R. Bandler, James A. Chervenak, Saptarshi Chaudhuri, Carl S. Dawson, Edward V. Denison, William B. Doriese, Shannon M. Duff, F. M. Finkbeiner, C. T. FitzGerald, Joseph W. Fowler, Johnathon D. Gard, Gene C. Hilton, Kent D. Irwin, Young I. Joe, R. L. Kelley, Caroline A. Kilbourne, A. R. Miniussi, Kelsey M. Morgan, Galen C. O'Neil, Christine G. Pappas, F. S. Porter, Carl D. Reintsema, David A. Rudman, Kazuhiro Sakai, Stephen J. Smith, Robert W. Stevens, Daniel S. Swetz, Paul Szypryt, Joel N. Ullom, Leila R. Vale, N. Wakeham, Joel C. Weber, B. A. Young
Time-division multiplexing (TDM) is the backup readout technology for the X-ray Integral Field Unit (X-IFU), a 3168-pixel X-ray transition-edge sensor (TES) array that will provide imaging spectroscopy for european space agency's Athena satellite mission

Designing Molecular Building Blocks for the Self-assembly of Complex Porous Networks

March 19, 2019
Author(s)
Tiara A. Maula, Harold Hatch, Vincent K. Shen, Rangarajan Srinivas, Jeetain Mittal
Molecular building blocks which self-assemble into large ordered porous networks have been long sought-after, and have led to the development of metal organic frameworks and covalent organic frameworks. However, despite the great potential possessed by

Ramsey Spectroscopy with Displaced Frequency Jumps

March 19, 2019
Author(s)
Moshe Shuker, Juniper Wren Y. Pollock, Rodolphe Boudot, V. I. Yudin, A. V. Taichenachev, John E. Kitching, Elizabeth A. Donley
Sophisticated Ramsey-based interrogation protocols using composite laser pulse sequences have been recently proposed to provide in next-generation high-precision atomic clocks a near perfect elimination of frequency shifts induced during the atom-probing

Removal of Synthetic Azo Dye using Bimetallic Nickel-Iron Nanoparticles

March 19, 2019
Author(s)
Shelby Foster, Katie Estoque, Michael Voecks, Nikki Rentz, Lauren Greenlee
Bimetallic nanoparticles comprised of Iron (Fe) and Nickel (Ni) were investigated for the removal of an azo dye contaminant in water. NiFe nanoparticles were synthesized using a batch aqueous synthesis method that is scalable and environmentally safe

A Rydberg Atom-Based Mixer: Measuring the Phase of a Radio Frequency Wave

March 18, 2019
Author(s)
Christopher L. Holloway, Matthew T. Simons, Abdulaziz H. Haddab, Joshua A. Gordon
Rydberg atoms have been shown to be very useful in performing absolute measurements of the magnitude of a radio frequency (RF) field using electromagnetically-induced transparency (EIT). However, there has been less success in using Rydberg atoms for the

Correlated Spin Canting in Ordered Core-Shell Fe 3 O 4 /Mn x Fe 3-x Od4^ Nanoparticle Assemblies

March 18, 2019
Author(s)
Y. Ijiri, Kathryn L. Krycka, I. Hunt-Isaak, H. Pan, J. Hsieh, Julie Borchers, James Jennings Rhyne, Samuel D. Oberdick, A. Abdelgawad, S. A. Majetich
Polarization-analyzed small-angle neutron scattering methods are used to determine the spin arrangements in ordered three-dimensional assemblies of 7.4 nm diameter core-shell Fe 3O 4/Mn xFe 3-xO 4 nanoparticles. In moderate to high magnetic fields, the

Optimization of Time-and Code-Division-Multiplexed Readout for Athena X-IFU

March 18, 2019
Author(s)
William B. Doriese, Simon R. Bandler, Saptarshi Chaudhuri, Carl S. Dawson, Edward V. Denison, Shannon M. Duff, Malcolm S. Durkin, C. T. FitzGerald, Joseph W. Fowler, Johnathon D. Gard, Gene C. Hilton, Kent D. Irwin, Young I. Joe, Kelsey M. Morgan, Galen C. O'Neil, Christine G. Pappas, Carl D. Reintsema, David A. Rudman, Stephen J. Smith, Robert W. Stevens, Daniel S. Swetz, Paul Szypryt, Joel N. Ullom, Leila R. Vale, Joel C. Weber, B. A. Young
Readout of a large, spacecraft-based array of superconducting transition-edge sensors (TESs) requires careful management of the layout area and power dissipation of the cryogenic-circuit components. We present three optimizations of our time- (TDM) and

Data for secondary electron production from ion precipitation at Jupiter II: Simultaneous and non-simultaneous target and projectile processes in collisions of Oq+ + H2 (q=0-8)

March 15, 2019
Author(s)
David R. Schultz, Heman Gharibnejad, Thomas Cravens, Stephen Houston
To improve the physical completeness of the data previously calculated [Schultz et al. ADNDT 113, 1 (2016)] to enable modeling of the effects of secondary electrons produced by energetic ion precipitation at Jupiter, we extend the treatment to include

interlab: A Python module for analyzing interlaboratory comparison data

March 15, 2019
Author(s)
David A. Sheen
interlab was developed as a software tool to perform consensus analysis on spectral data from interlaboratory studies. It is designed to estimate the spread in the spectral data and to identify possible outliers among both spectral populations and

Bubble Point Measurements of Neopentane + Ethane Mixtures

March 14, 2019
Author(s)
Elisabeth Mansfield, Vladimir Diky
Bubble point measurements have been taken on three compositions of neopentane + ethane systems. The results are modeled with a Peng-Robinson equation with symmetrical mixing rule and a Helmholtz-energy based 4-parameter model. Interaction parameters for

Microporous Metal-Organic Framework with Dual Functionalities for Efficient Separation of Acetylene from Light Hydrocarbon Mixtures

March 14, 2019
Author(s)
Hao Li, Libo Li, Rui-Biao Lin, Giorgio Ramirez, Wei Zhou, Rajamani Krishna, Zhangjing Zhang, Shengchang Xiang, Banglin Chen
Separating acetylene from light hydrocarbon mixtures like ethylene is a very important process for downstream industrial applications. Herein, we report a new MOF [CuL 2(SiF 6)](UTSA-220, L = 1E,2E)-1,2-bis(pyridin-4-ylmethylene)hydrazine) with dual

Multi-Energy X-Ray Tomography of an Optical Fiber: The Role of Spatial Averaging

March 14, 2019
Author(s)
Zachary H. Levine, Adele P. Peskin, Edward J. Garboczi, Andrew Holmgren
Using a commercial X-ray tomography instrument, we have obtained reconstructions of a graded-index optical fiber with voxels of edge length 1.05 µm at 12 tube voltages. The fiber manufacturer created a graded index in the central region by varying the

Pore Space Partition within a Metal-Organic Framework for Highly Efficient C 2 H 2 /CO 2 Separation

March 14, 2019
Author(s)
Yingxiang Ye, Zhenlin Ma, Rui-Biao Lin, Rajamani Krishna, Wei Zhou, Quanjie Lin, Zhangjing Zhang, Shengchang Xiang, Banglin Chen
The pore space partition (PSP) approach has been employed to realize a novel porous MOF (FJU-90) with dual functionalities for the challenging C 2H 2/CO 2 separation under ambient conditions. By virtue of a triangular ligand (Tripp = 2,4,6-tris-(4-pyridyl
Displaying 10176 - 10200 of 73697
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