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.
Defects within the insulin signaling pathways are a major locus for the development of insulin resistance and type 2 diabetes. The phorbol 12-myristate 13...
Formalin-fixed, paraffin embedded tissue specimens for histopathology are cut to 3-20 μm thickness to allow transmission of light, and optimize tissue...
Geraldine S. Cheok, Marek Franaszek, James J. Filliben
An acceptance sampling method, based on obtaining physical measurements, for accepting 2D building plans generated from 3D imaging data is evaluated and...
Guerda Massillon, Ronaldo Minniti, Christopher G. Soares, M.J. Maryanski, S Robertson
In this work, the properties of the new BANG gel, specifically made for high-ionization density dosimetry, were investigated. The measurements were performed at...
Angela R. Hight Walker, Jeffrey A. Fagan, Stephanie A. Hooker, Michael T. Postek, Stephen A. Wise, Andras Vladar, Rolf L. Zeisler
Harmonized sample pre-treatment is an integral first step in ensuring metrological quality of measurements as regards repeatability, inter-laboratory...
Despite significant investment in tissue engineering research, few profitable products have come to market. Hence, there is a need to accelerate tissue...
This is an Editorial for the December, 2009 issue of IEEE Microwave Magazine. Kate Remley, the Editor-in-Chief, writes about timely topics for the members of...
Jun-Feng Song, Theodore V. Vorburger, Susan M. Ballou, Li Ma, Thomas Brian Renegar, Xiaoyu Alan Zheng, Martin Ols
The National Institute of Standards and Technology (NIST) in collaboration with the Bureau of Alcohol, Tobacco, Firearms, and Explosives (ATF) has developed the...
Julie N. Albert, Michael J. Baney, Christopher Stafford, Jennifer Y. Kelly, Thomas H. Epps
We utilize an innovative vapor deposition set-up and cross-diffusion of functionalized chlorosilanes under dynamic vacuum to generate a linear gradient in...
A single, closed three-state -system in room-temperature rubidium is investigated experimentally using a copropagating beam parallel-polarization configuration...
Robert D. Chirico, Vladimir Diky, Andrei F. Kazakov, Chris D. Muzny, Michael D. Frenkel
ThermoData Engine (TDE) is the first full-scale software implementation of the dynamic data evaluation concept, as reported recently in this journal. This paper...
Gila Stein, James Alexander Liddle, Andrew Aquila, Eric M. Gullikson
The size, shape, and roughness of poly(styrene-b-methyl methacrylate) block copolymer domains assembled on an epitaxial template are characterized with soft x...
Properties of six-component electromagnetic field solutions of a matrix form of the Maxwell equations, analogous to the four-component solutions of the Dirac...
Dmitriy Krepkiy, Mihaela Mihailescu, J. Alfredo Freites, Eric V. Schow, David Worcester, Klaus Gawrisch, Douglas Tobias, Stephen White, Kenton J. Swartz
Despite the growing number of atomic-resolution membrane protein structures, direct structural information about proteins in their native membrane environment...
Sergey V. Polyakov, Alan L. Migdall, Giorgio Brida, Ivo P. Degiovanni, Fabrizio Piacentini, V Schettini
We present a photon-counting detection system at telecom wavelengths that overcomes the difficulties of photon-counting at high rates. Our detection system uses...
ABSTRACT: We studied the complex conductivity of regio-regular poly(3-hexylthiophene) (P3HT) in the temperature range between 193K to 333 K (-80 C to 60 C) and...
Daniel K. Havey, Joseph T. Hodges, David A. Long, Mitchio Okumura, Charles E. Miller
We report frequency-stabilized cavity ring-down spectroscopy measurements of high-J O2 A-band magnetic dipole line parameters. Our goals were to measure...
N Boeuf, I Chaperot, E Dauler, G Jaeger, Andreas Muller, Alan L. Migdall
This is a program for calculating characteristics of collinear and non-collinear phase matching in both uniaxial and biaxial crystals. In particular, this...
Eun S. Park, John R. Sieber, Charles M. Guttman, Kirk D. Rice, Kathleen M. Flynn, Stephanie S. Watson, Gale A. Holmes
There is great interest in the degradation of ballistic fibers from exposure to sunlight and high humidity, because it directly affects the lives of people who...
Current existing and proposed U.S. flammability standards for soft furnishings such as mattresses and upholstered furniture specify a standard cigarette as the...
The p-ρ-T behavior of high-purity (99.999%) propane was measusred from 265 K to 500 K with pressures to 36 MPa with a two-sinker densimeter. The measurements...
Times New RomanA formulation is presented for the thermodynamic properties of propane. The equation of state is valid for temperatures from the triple point...
Richard A. Perkins, Jesus C. Sanchez Ochoa, Joe W. Magee
Molar heat capacities at constant volume (C v) were measured with an adiabatic calorimeter for pure propane. The high purity of the samples was verified by...
We review the progress in acoustic metrology of gases that has occurred since the 1988 measurement of the universal gas constant R using a spherical acoustic...
Samuel P. Benz, D. R. White, Jifeng Qu, Horst Rogalla, Weston L. Tew
Currently, the CODATA value of the Boltzmann constant is dominated by a single gas-based-thermometry measurement with a relative uncertainty of 1.8 ձ0^-6. This...