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Displaying 451 - 475 of 1184

Remineralization Effects of A Two-Solution Fluoride Mouthrinse: An in situ Study

October 1, 1999
Author(s)
Laurence C. Chow, Shozo Takagi, Clifton M. Carey, B A. Sieck
… and 228 ppm two-solution rinses were more effective (p < 0.05) than the 250 ppm F NaF rinse in reducing lesion … two-component rinse was statistically equivalent (p > 0.05) to that produced by the NaF rinse with 4 times the F …

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

Certification of Standard Reference Material 2365 BK Virus DNA Quantitative Standard

August 29, 2018
Author(s)
Megan H. Cleveland, Natalia Farkas, Kevin M. Kiesler, Blaza Toman, Peter M. Vallone
Standard Reference Material (SRM) 2365 is intended for use in the value assignment of BK virus deoxyribonucleic acid (DNA) to BK DNA controls and standards. A unit of SRM 2365 consists of a well characterized, linearized plasmid, containing BK virus DNA

Verification of Calibration Methods for Determining Photon-Counting Detection Efficiency using Superconducting Nano-Wire Single Photon Detectors

September 4, 2017
Author(s)
Igor Vayshenker, Robert D. Horansky, John H. Lehman, Malcolm G. White, Sae Woo Nam, Ingmar Mueller, Lutz Werner, G. Wuebbeler
In the recent years several ways to radiometrically calibrate optical fiber-coupled detectors have been developed. However, fiber-coupled calibration methods for single photon detectors have not been compared by national metrology institutes validating the

Effect of a micro-copolymer addition on the thermal conductivity of fly ash mortars

November 5, 2015
Author(s)
Alejandro Duran-Herrera, Joana K. Campos-Dimas, P Valdez, Dale P. Bentz
In this study, a copolymer composed of hollow spherical particles with an average particle size of 90 µm was evaluated as a lightweight aggregate in Portland cement-fly ash mortars to improve the thermal conductivity (k) of the composite. Mortars were

Millimeter-Wave Modulated-Signal and Error-Vector-Magnitude Measurement With Uncertainty

May 1, 2015
Author(s)
Catherine A. Remley, Dylan F. Williams, Paul D. Hale, Chih-Ming Wang, Jeffrey A. Jargon, Youngcheol Park
We provide techniques to generate and characterize precision wideband millimeter-wave modulated signals. We use predistortion to obtain a significant improvement in signal quality and an associated reduction in the error vector magnitude (EVM) of the

Diffusive Transport of Multiwall carbon nanotubes through an HDPE geomembrane

September 30, 2013
Author(s)
Pooneh Taghizadeh-Saheli, R. K. Rowe, Elijah Petersen, Denis O'Carroll
Carbon nanotubes are used in a wide range of consumer products. During the last few years, the applications for, and production of, carbon nanotubes has increased substantially. Due to their potential environmental and human health risks and eventual

Development of a Quantum-Voltage-Calibrated Noise Thermometer at NIM

September 11, 2013
Author(s)
Jifeng Qu, Samuel Benz, Jianqiang Zhang, Horst Rogalla, Yang Fu, Alessio Pollarolo, Jintao Zhang
A quantum-voltage-calibrated Johnson-noise thermometer was developed at NIM, which measures the Boltzmann constant k through comparing the thermal noise across a 100  sense resistor at the temperature of the triple point water to the comb-like voltage

Simple Test and Modeling of RFID Tag Backscatter

July 1, 2012
Author(s)
Daniel G. Kuester, David R. Novotny, Jeffrey R. Guerrieri, Aniwar Ibrahim, Zoya Popovic
We consider here worst-case analysis of backscatter from passive radio frequency identification (RFID) tags. The basis is a figure of merit "B" to relate link power at reader ports to tag circuit parameters. A minimum bound for received monostatic

Thermodynamic Properties of o-Xylene, m-Xylene, p-Xylene, and Ethylbenzene

June 27, 2012
Author(s)
Eric W. Lemmon, Yong Zhou, Jiangtao Wu
Equations of state for the xylene isomers (o-xylene, m-xylene, and p-xylene) and ethylbenzene have been developed with the use of the Helmholtz energy as the fundamental property with independent variables of density and temperature. The general

Compressed-liquid densities of two highly polar + non-polar binary systems

June 24, 2012
Author(s)
Stephanie L. Outcalt, Arno R. Laesecke
The binary systems ethanol + 2,2,4-trimethylpentane and 2-butanol + 2,2,4-trimethylpentane were studied as models for blends of gasoline with biofuels. Their densities were measured with a vibrating-tube densimeter at compressed-liquid states of three

CfA4: 93 Type Ia Supernova Light Curves from the CfA

May 17, 2012
Author(s)
Malcolm Hicken, Peter Challis, Robert Kirshner, Claire E. Cramer, Armin Rest, W. M. Wood-Vasey, Gaspar Bakos, Perry Berlind, Warren R. Brown, Nelson Caldwell, Michael Calkins, Maria Contreras, Gil Esquerdo, Mark Everett, Emilio Falco, Ted Groner, Matthew J. Holman, Robert Hutchison, Michael Pahre, Wayne Peters, Benjamin Ripman, Timothy Spahr, Andrew Szentgyorgyi, Manuel A. Torres, Amali Vaz
… has a precision of . 0.025 mag in BVr'i' and . 0.05 mag in Uu′ for points brighter than 17.5 mag. We also …

Spectroscopic Measurement of the Vapour Pressure of Ice

January 1, 2012
Author(s)
Katarzyna E. Bielska, Daniel K. Havey, Gregory E. Scace, D Lisak, Joseph T. Hodges
We present a laser absorption technique to measure the vapor pressure of ice. This method is referenced to the triple point state of water and uses frequency-stabilized cavity ring-down spec- troscopy to probe four rotation-vibration transitions of H16 2 O

Common Origin of the Two Types of Magnetic Fluctuations in Iron Chalcogenides

December 5, 2011
Author(s)
Songxue Chi, Jose Rodriguez Rivera, Jeffrey W. Lynn, Chenglin Zhang, D. Phelan, Deepak Singh, Rick L. Paul, Pengcheng Dai
We use inelastic neutron scattering to study the low energy spin excitations in moderately doped non-superconducting Fe 1.01Te 0.72Se 0.28. The spin excitations in this system contain components near (0.5,0,0) and (0.5, 0.5,0) in a-b plane reciprocal
Displaying 451 - 475 of 1184
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