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.

Journals

Using metagenomic methods to detect organismal contaminants in microbial materials.

September 12, 2017

Author(s)

Nathanael D. Olson, Justin M. Zook, Jayne B. Morrow, Nancy J. Lin

High sensitivity methods as next generation sequencing and PCR are adversely impacted by organismal and DNA contaminants. Current methods for detecting...

Two simple modifications to improve the magnetic field profile in radial magnetic systems

September 12, 2017

Author(s)

Stephan Schlamminger, Shisong Li

All current watt balances employ permanent magnet systems using a yoke with high permeability as flux return. Very often these systems are built with vertical...

Erratum to: Correlations for the Dielectric Constants of H2S, SO2, and SF6

September 11, 2017

Author(s)

Allan H. Harvey, Raymond D. Mountain

Erratum to previous publication to correct incorrect units for dipole moment printed in original.

Comparison of open-path dual frequency comb spectroscopy for high-precision atmospheric gas measurements

September 11, 2017

Author(s)

Eleanor M. Waxman, Kevin C. Cossel, Gar Wing Truong, Fabrizio R. Giorgetta, William C. Swann, Sean Coburn, Robert J. Wright, Gregory B. Rieker, Ian R. Coddington, Nathan R. Newbury

Determination of the Boltzmann constant with cylindrical acoustic gas thermometry: new and final results

September 11, 2017

Author(s)

Keith A. Gillis, XiaoJuan Feng, Jintao Zhang, H. Lin, James B. Mehl, Michael R. Moldover, K Zhang, Y.N. Duan

We report a new determination of the Boltzmann constant k B using a cylindrical acoustic gas thermometer. We determined the length of the copper cavity from...

Probing Elastic and Viscous Properties of Phospholipid Bilayers using Neutron Spin Echo Spectroscopy

September 11, 2017

Author(s)

Michihiro Nagao, Elizabeth G Kelley, Rana Ashkar, Robert David Bradbury, Paul Butler

The elastic and viscous properties of self-assembled amphiphilic membranes dictate the intricate hierarchy of their structure and dynamics ranging from the...

Formation of a crack-free, hybrid skin layer with tunable surface topography and improved gas permeation selectivity on elastomers using gel-liquid infiltration polymerization

September 11, 2017

Author(s)

Justin Gorham, Jason Killgore, Maryam Omidvar, Haiqing Lin, Frank W. DelRio, Lewis M. Cox, Zheng Zhang

Liquid-liquid interfacial polymerization (ll-IP) is conventionally used for manufacturing bulk polymers like nylon, as well as forming barrier layers for...

Multi-environment Nanocalorimeter with Electrical Contacts for Use in the Scanning Electron Microscope

September 11, 2017

Author(s)

Feng Yi, Ana Stevanovic, William Alexander Osborn, Andrei Kolmakov, David A. LaVan

We have developed a versatile nanocalorimeter sensor which allows imaging and electrical measurements of samples under different gaseous environments using the...

New measurement of the Boltzmann constant k by acoustic thermometry of helium-4 gas

September 11, 2017

Author(s)

Laurent Pitre, Fernando Sparasci, Michael R. Moldover, Cecile Guianvarch, Catherine Martin, Martin Himbert, Mark Plimmer, James B. Mehl, Giuliano Albo, Bo Gao, Lara Risegari

The SI unit of temperature will soon be redefined in terms of a fixed value of the Boltzmann constant k derived from an ensemble of measurements worldwide. We...

The Cytosolic Domain of T Cell Receptor ζ Associates with Membranes in a Dynamic Equilibrium and and Deeply Penetrates the Bilayer

September 11, 2017

Author(s)

Kerstin Zimmermann, Rebecca Eells, Frank Heinrich, Stefanie Rintoul, Brian Patrick Josey, Prabhanshu Shekhar, Mathias Loesche, Lawrence J. Stern

Interactions between lipid bilayers and the membrane-proximal regions of membrane-associated proteins play important roles in regulating membrane protein...

Under-Reporting of Wildland Fires in NFIRS: California

September 8, 2017

Author(s)

David T. Butry, Douglas S. Thomas

The absence of a comprehensive database on fire occurrence along with the possibility of inaccurate data entry in current datasets means that some proportion of...

An Efficient Synthesis of Dibenzo[a,l]tetracene and Dibenzo[a,j]tetracene and Their Identification in a Coal Tar Extract

September 8, 2017

Author(s)

Srinivasa Ramisetti, Jorge O. Ona Ruales, Stephen Wise, Shantu Amin, Arun Sharma

An efficient synthesis of dibenzo[a,l]tetracene (1) and dibenzo[a,j]tetracene (2) has been developed using Diels-Alder reaction of in situ generated ortho...

Optical Measurement of Radiocarbon Below Unity Fraction Modern by Linear Absorption Spectroscopy

September 7, 2017

Author(s)

Adam J. Fleisher, David A. Long, Qingnan Liu, Lyn Gameson, Joseph T. Hodges

High-precision measurements of radiocarbon (14C) near or below a fraction modern 14C of one (F14C ≤ 1) are costly, requiring the shipment of samples to...

Fine Tuning of MOF-505 Analogues to Reduce Low-Pressure Methane Uptake and Enhance Methane Working Capacity

September 7, 2017

Author(s)

Mingxing Zhang, Wei Zhou, Tony Pham, Katherine A. Forrest, Wenlong Liu, Yabing He, Hui Wu, Taner N. Yildirim, Banglin Chen, Brian Space, Yi Pan, Michael J. Zaworotko, Junfeng Bai

We present a crystal engineering strategy to fine tune the pore chemistry of a family of isomorphous MOFs with similar pore size, pore surface properties and...

Construction of ntt-Type Metal-Organic Framework from C₂-Symmetry Hexacarboxylate Linker for Enhanced Methane Storage

September 7, 2017

Author(s)

Guohai Xu, Bin Li, Hui Wu, Wei Zhou, Banglin Chen

Methods and Considerations to Determine Sphere Center from Terrestrial Laser Scanner Point Cloud Data

September 6, 2017

Author(s)

Prem K. Rachakonda, Balasubramanian Muralikrishnan, Luc Cournoyer, Geraldine S. Cheok, Vincent D. Lee, Katharine M. Shilling, Daniel S. Sawyer

The Dimensional Metrology Group (DMG) at the National Institute of Standards and Technology (NIST) is performing research to support the development of...

Above threshold scattering about a Feshbach resonance for ultracold atoms in an optical collider

September 6, 2017

Author(s)

Eite Tiesinga, Milena S. Horvath, Ryan Thomas, Amita B. Deb, Niels Kjaergaard

Studies of magnetically tunable Feshbach resonances in ultracold atomic gases have predominantly been car- ried out in the zero collision-energy limit. Here, we...

Fibronectin in Layer-by-Layer Assembled Films Switches Tumor Cells between 2D and 3D Morphology

September 6, 2017

Author(s)

Kiran Bhadriraju, Jennifer S. Hong, Steven Lund, Darwin Reyes-Hernandez

Cells in tissues dynamically sense and modulate the adhesive and mechanical properties of their surroundings, according to the functional requirements of normal...

Effects of Microstructure on Electrochemical Reactivity and Conductivity in Nanostructured Ceria Thin Films

September 6, 2017

Author(s)

Jilai Ding, Evgheni Strelcov, Nazanin Bassiri-Gharb

The low temperature proton conductivity in nanostructured ceria (NC) is crucial in determining electrochemistry and transport phenomena in a number of...

Pressure reciprocity calibration of a MEMS microphone

September 5, 2017

Author(s)

Randall Wagner, Steven E. Fick

ESTABLISHING BRDF CALIBRATION CAPABILITIES THROUGH SHORTWAVE INFRARED

September 5, 2017

Author(s)

Catherine C. Cooksey, Georgi T. Georgiev, James Butler, Kurtis J. Thome, Leibo Ding

Satellite instruments operating in the reflective solar wavelength region require accurate and precise determination of the Bidirectional Reflectance...

Intrinsic conductivity, particle shape, and the Coulter particle counting method

September 4, 2017

Author(s)

Edward J. Garboczi

The Coulter particle counting method has been in use for more than five decades. It records a change in resistance when a particle flows from a large reservoir...

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...

Anion Capture and Exchange by Functional Coatings: New Routes to Mitigate Steel Corrosion in Concrete Infrastructure

September 4, 2017

Author(s)

Gabriel Falzone, Magdalena Balonis, Dale P. Bentz, Scott Jones, Gaurav Sant

Chloride induced corrosion is a major cause of degradation of reinforced concrete infrastructure. While the binding of chloride ions (Cl-) by cementitious...

Experimental Investigation of Wood Decking Assemblies Exposed to Firebrand Showers

September 1, 2017

Author(s)

Samuel Manzello, Sayaka Suzuki

Wildland-Urban Interface (WUI) fires have become a problem of great concern across multiple continents. An important mechanism of structure ignition in WUI...

Ionizing Radiation Processing and its Potential in Advancing Biorefining and Nanocellulose Composite Materials Manufacturing

September 1, 2017

Author(s)

Michael T. Postek, Dianne L. Poster, Andras Vladar, Mark S. Driscoll, Jay A. LaVerne, Zios Tsinas, Mohamad Al-Sheikhly

Nanocellulose is a high value material that has gained increasing attention because of its high strength, stiffness, unique photonic and piezoelectric...

3.5 GHz Environmental Sensing Capability Detection Thresholds and Deployment

September 1, 2017

Author(s)

Thao Nguyen, Anirudha Sahoo, Michael R. Souryal, Timothy Hall

Spectrum sharing in the 3.5~GHz band between commercial and government users along U.S. coastal areas depends on an Environmental Sensing Capability (ESC)--...

Quantum Light Turned on by Nanotube Chemistry

September 1, 2017

Author(s)

Ming Zheng, Kartik A. Srinivasan

Room-temperature single-photon emission at telecom wavelengths is realized by organic color centers chemically implanted on chirality-defined single-wall carbon...

Optimizing High-Resolution Mass Spectrometry for the Identification of Low-Abundance Post- Translational Modifications of Intact Proteins

September 1, 2017

Author(s)

Lisa E. Kilpatrick, Eric L. Kilpatrick

Intact protein analysis by liquid chromatography-mass spectrometry (LC-MS) is now possible due to the improved capabilities of mass spectrometers yielding...

An experimental study of precast concrete moment frames under a column removal scenario

September 1, 2017

Author(s)

Hai S. Lew, Joseph Main, Yihai Bao, Fahim Sadek, Vincent P. Chiarito, Stephen D. Robert, Jorge Torres

This paper presents a full-scale experimental study of two precast concrete moment-frame assemblies, each comprising three columns and two beams. The assemblies...

Was this page helpful?