An official website of the United States government
Here’s how you know
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.
Curtis W. Meuse, R W. Hendler, P D. Smith, John Kakareka
New procedures are presented for preparing thin films of bR in a CaF2 cell and maintaining the hydration level between 0.1 and 0.5 μL/cm2, at a pH near 7.1. The
We have re-examined the sequential proton-binding and -releasing amino acid side chains involved in the energy-driven transport of protons across the membrane
Fahim H. Sadek, Joseph Main, Hai S. Lew, Yihai Bao
This paper presents an experimental and computational assessment of the performance of steel and reinforced concrete beam-column assemblies under vertical
Robert J. Flatt, George W. Scherer, Jeffrey W. Bullard
Cement hydration continues to have an intriguing character, surrounded as it is by a number of intensively debated questions. Among the unresolved issues is the
Kambiz Raoufi, John Schlitter, Dale P. Bentz, Jason Weiss
This study used a finite element model to examine how the properties of cementitious mortar are related to the rate of stress development in the dual ring test
Leonardo Avarez-Valtierra, David F. Plusquellic, John T. Yi, David W. Pratt
Rotationally resolved fluorescence excitation spectroscopy has been used to study the dynamics, electronic distribution, and the relative orientation of the
Marc L. Salit, Lichun Jiang, Felix Schlesinger, Brian Oliver, Carrie Davis, Yu Zhang, Renhua Li, Thomas R. Gingeras
High-throughput sequencing of cDNA (RNA-seq) is a widely deployed transcriptome profiling and annotation technique, but questions about the performance of
The static method of measuring equilibrium vapor pressure requires locating the sample at the coldest part of the apparatus to avoid errors due to evaporation
Elizabeth A. Donley, Eugene N. Ivanov, Francois-Xavier R. Esnault
For heterodyne phase locking, frequency division of the beat note between two oscillators can improve the reliability of the phase lock and the quality of the
Thomas R. Gentile, C. D. Bass, Jeffrey S. Nico, H Breuer, R Farrell
We present results for detection of X-rays by large area avalanche photodiodes (APDs) in strong magnetic fields and at cryogenic temperatures. Whereas at room
This paper gives an overview of measurement techniques used in the THz region of the electromagnetic spectrum, from about 100 GHz to several THz. Currently
Steven J. Emmerich, Brian J. Polidoro, James W. Axley
In earlier work (Axley and Emmerich 2002), NIST developed a climate suitability analysis technique to evaluate the potential of a given location for direct
Building energy efficiency has been an important goal for decades. Since the energy crisis of the 1970s, much has been learned about how to improve energy
William H. Rippard, Ranko R. Heindl, Matthew R. Pufall, Stephen E. Russek, Anthony B. Kos
We have measured the relaxation time of a thermally unstable ferromagnetic nanoparticle incorporated into a magnetic tunnel junction (MTJ) as a function of
Phenytoin (PHT), phenobarbital (PHB), lamotrigine (LTG), and topiramate (TPM) are some of the most widely used antiepileptic drugs (AEDs). Monitoring of their
The analysis of complex fluids such as fuels poses significant challenges arising primarily from the multiplicity of components, the different properties of the
Joel Helton, Deepak Singh, Harikrishnan S. Nair, Suja Elizabeth
Hexagonal Dy 0.5Y 0.5MnO 3, a multiferroic rare earth manganite with geometrically frustrated antiferromagnetism, has been investigated with neutron diffraction
Using pre-synthesized Cu-Cu1.81S hetero-oligomer and Cu-Cu2S heterodimer NCs as templates and reactants, the addition of HAuCl4 leads to the preferential
Chad R. Snyder, Dean M. DeLongchamp, Jessica S. Henry
The impact of regioregularity in poly(3-hexylthiophene-2,5-diyl) (P3HT) on crystallization behavior and quantitative limits to possible crystal sizes is
Brad Bittel, Patrick Lenahan, Jason Ryan, Jody Fronheiser, Aivars Lelis
We demonstrate a very powerful electrically detected magnetic resonance (EDMR) technique, spin dependent charge pumping (SDCP) and apply it to 4H SiC metal
Andrew A. Herzing, Gemma L. Brett, Peter Miedziak, Nikolaos Dimitratos, Meenakshisundaram Sankar, Marco Conte, Jose A. Lopez-Sanchez, David W. Knight, Stuart H. Taylor, Graham J. Hutchings, Qian He, Christopher J. Kiely
AuPt or AuPd nanoparticles when supported on Mg(OH)2 are highly active for the selective oxidation of glycerol under base-free conditions at ambient
In this Letter we reinterpret the widely-used Steele 10-4-3 potential for a gas molecule interacting with a planar surface, and derive analogous potentials for
Konrad Rykaczewski, John H. Scott, Sukumar Rajauria, W R. Ashurst, Jeff Chinn, Amy Chinn, Wanda Jones
We report formation of nano-to-microscale satellite droplets in the geometrical shadow of high contact angle primary drops during dropwise water condensation on
We employed inelastic neutron scattering (INS) method to directly monitor the change of molecular hydrogen in the Pt-doped activated carbon (Pt/AC) samples and