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

Vapor-Liquid Equilibrium of Mixed Solvent Electrolyte Solutions: Measurements and Models

October 16, 2008

Author(s)

L. A. Watts

An equation of state has been developed to model the phase equilibria of mixtures of water + organic solvents + salts. This modeis based on the Peng-Robinson...

Refined Calculations of Effective Attenuation Lengths for SiO₂ Film Thicknesses by X-Ray Photoelectron Spectroscopy

October 16, 2008

Author(s)

Cedric J. Powell, W S. Werner, W Smekal

We report electron effective attenuation lengths (EALs) for SiO2 films on Si that were obtained from Monte Carlo simulations of substrate Si 2p3/2 photoelectron...

Report on the Key Comparison CCM.P-K4 in Absolute Pressure From 1 Pa to 1000 Pa

October 16, 2008

Author(s)

A P. Miiller, M Bergoglio, N Bignell, Kitty Fen, S S. Hong, Karl Jousten, Pardeep Mohan, R J. Redgrave, M Sardi, D Simpson

This report decribes a CCM key comparison of low absolute-pressure standards at seven National Measurement Institutes (NMIs) that was carried out during the...

Intermolecular Disulfide Bridge in the Crystal Structure of the ygfZ Protein From Escheriachia Coli

October 16, 2008

Author(s)

A Teplyakov, G Obmolova, A Howard, Andrey Galkin, W Krajewski, E Sarikaya, O Herzberg, G L. Gilliland

With large-scale genomic sequencing efforts meeting with success, post-genomics research efforts are focusing on functional assignment of gene products. One...

Thermodynamic Properties of Gaseous Nitrous Oxide and Nitric Oxide From Speed-of-Sound Measurements

October 16, 2008

Author(s)

John J. Hurly

The speed of sound was measured in gaseous nitrous oxide (N2O) and nitric oxide (NO) using an acoustic resonance technique with a relative standard uncertainty...

Effects of Substitution on Reorganization Energies in Oligo(-phenylene ethynylene) Molecular Wires

October 16, 2008

Author(s)

Steven W. Robey, Jacob Ciszek, J M. Tour

Observations of non-linear transport characteristics in nanoscale junctions triggered interest in phenylene ethynylene oligomers as potential electronic...

Interaction Between Putidaredoxin and Its Redox Partner, Putidaredoxin Reductase

October 16, 2008

Author(s)

Marcia J. Holden, M P. Mayhew, V L. Vilker

Using site-directed mutagenesis we altered surface residues on Putidaredoxin to investigate which side-chain residues might be involved in the binding of...

A Micro-Gas Delivery System in the Environmental Scanning Electron Microscope for In-Situ Microhotplate Chemical Vapor Deposition

October 16, 2008

Author(s)

Scott A. Wight, Richard E. Cavicchi, M J. Nystrom

A device has been developed for introducing small quantities of gas directly to the specimen in the environmental scanning electron microscope chamber. This...

Recombinant Anthranilate Synthase From the Marine Hyperthermophile Archaeoglobus Fulgidus: Expression, Purification, Characterization and Stabilization of the Cooperatively-Regulated Heterotetrameric Enzyme

October 16, 2008

Author(s)

W M. Byrnes, V L. Vilker

Thermostable anthranilate synthase from the marine sulfate-reducing hyperthermophile Archaeoglobus fulgidus has been expressed in Escherichia coli, purified...

Modeling the Water-R134a Partition Coefficients of Organic Solutes Using a Linear Solvation Energy Relationship

October 16, 2008

Author(s)

A F. Lagalante, A M. Clarke, Thomas J. Bruno

A linear solvation energy relationship (LSER) has been developed to predict the water-R134a partition coeffiecients for a published collection of organic...

Water Dissociation in the Presence of Metal Ions

October 16, 2008

Author(s)

Orkid Coskuner, Emily Jarvis, Thomas C. Allison

Hydrated metal ions are important in a variety of biological and environmental systems, yet a comprehensive picture of the dynamic local environment associated...

Remarks on Irreversible Processes and Entropy Increase

October 16, 2008

Author(s)

B Robertson

Thermodynamics defines entropy only at equilibrium and says that, for an isolated system that undergoes an irreversible process, the entropy is increased. It is...

Vapor-Liquid Equilibrium for the Binary Difluoromethane (R-32)+ Propane (R-290) Mixture

October 16, 2008

Author(s)

Yukihiru Higashi

The vapor-liquid equilibrium of the mixture composed of difluoromethane (R-32) and propane (R-290) was studied in the temperature range between 273.15 K and 313...

Electron-Excited Energy Dispersive X-Ray Spectrometry at High Speed and at High Resolution: Silicon Drift Detectors and Microcalorimeters

October 16, 2008

Author(s)

Dale E. Newbury

Two recent developments in x-ray measurement technology provide dramatic improvements in analytical x-ray measurement science that will impact the frontiers of...

Thermodynamic Properties of Some Arsenic Compounds of Import to Groundwater Applications

October 16, 2008

Author(s)

Donald G. Archer, D K. Nordstrom, J G. Webster

Thermodynamic properties of several arsenic-containing substances are reviewed here, and a consistent set of thermodynamic properties for these species, derived...

Metrology in Support of Trace Explosive Detection Equipment for Airport Security Applications.

October 16, 2008

Author(s)

George A. Klouda, J Greg Gillen, Robert A. Fletcher, E S. Etz, Jennifer R. Verkouteren, R. Michael Verkouteren, E Ferguson

We are working in collaboration with the Transportation Security Agency's Trace Explosive Detection Group to build a chemical metrology program to help support...

Gas-Gas Equilibria - From Van der Waals to Ulrich Franck

October 16, 2008

Author(s)

Johanna Levelt Sengers

The experimental work of Ulrich Franck and his collaborators on phase separation in binary aqueous mixtures of gases at high pressures and temperatures is...

Molecular Depth Profiling of Multilayer Polymer Films Using Time of Flight Secondary Ion Mass Spectrometry

October 16, 2008

Author(s)

M S. Wagner

The low penetration depth and high sputter rates obtained using polyatomic primary ions have facilitated their use for the molecular depth profiling of some...

Energy Dispersive Spectrometry

October 16, 2008

Author(s)

Dale E. Newbury

Energy dispersive x-ray spectrometry (EDS) is a spectral measurement tool used with a wide variety of excitation sources: electrons, ions and x-ray. Photon...

Cluster Models of Bioenergetics. 4. Interaction Energies of Acetylcholine With Aromatic and Polar Molecules

October 16, 2008

Author(s)

C A. Deakyne, M Meot-Ner (Mautner)

The binding energies of the quaternary ions (CH 3)4N + and acetylcholine (ACh) to neutral molecules have been measured by pulsed high-pressure mass spectrometry...

Variable Magnification of Kirkpatrick-Baez Optics for Xynchrotron X-Ray Absorption Microscopy

October 16, 2008

Author(s)

Terrence J. Jach, A S. Bakulin, S M. Durbin, J Pedulla, A T. Macrander

Hard x-ray imaging microscopy using multilayer-coated Kirkpatrick-Baez mirrors produces absorption images with one micron resolution or better when used with a...

Rhodopsin Chemistry and Structure

October 16, 2008

Author(s)

K D. Ridge

Rhodopsin is a retinal photoreceptor protein of bipartite structure consisting of the transmembrane protein opsin and the light Sensitive chromophore 11-cis...

Quantitative Electron Probe Microanalysis of Rough Targets

October 16, 2008

Author(s)

Dale E. Newbury

Rough samples with topography on a scale that is much greater than the micrometer dimensions of the electron interaction volume present an extreme challenge to...

Metrology for Cancer Biomarkers: Affinity Analysis of Human HER2 and Telomerase With IgYs

October 16, 2008

Author(s)

Yan Xiao, G Gannot, M Emmert-Buck, S Srivastava, Paul D. Wagner, Peter E. Barker

To improve quantitation of HER2 and telomerase as cancer biomarkers, we have generated novel avian polyclonal antibodies of IgY isotype for comparison with...

Thermophysical Properties of Netrogen Trifuoride, Ethylene Oxide, and Trimethyl Gallium, from Speed-of-Sound Measurements

October 16, 2008

Author(s)

John J. Hurly

The speed of sound was measured in gaseous nitrogen trifluoride, ethylene oxide, and trimethyl gallium using a highly precise acoustic resonance technique. The...

International Comparison CCQM-K41: Hydrogen Sulfide in Nitrogen

October 16, 2008

Author(s)

Franklin R. Guenther, Walter R. Miller Jr.

This key comparison was intended to compare the capabilities for the preparation and value assignment of gas standards for hydrogen sulfide in nitrogen...

Probing Structural Contributions to Charge Transport Across Ni-Octanedithiol Multilayer Junctions

October 16, 2008

Author(s)

Lam H. Yu, Christopher D. Zangmeister, James G. Kushmerick

We report the fabrication and characterization of multilayer thin films incorporating 1,8-octanedithiols and Ni atoms. Low-temperature charge transport...

Delivery of DNA Through the CD5 Receptor Using an Avidinbiotin T101 Antibody Conjugate System

October 16, 2008

Author(s)

M C. Chakrabarti, J A. Carrasquillo, D Drumm, R D. Neumann, I Panyutin

We investigated the selective transfer of a plasmid to the target cells using an internalizing monoclonal antibody. We used T101 (IgG2a), a murinemonoclonal...

Heats of Apsorption of Hydocarbons on Laponite-RD Clay by Gas-Solid Chromatography: A WCOT Approach

October 16, 2008

Author(s)

A Lewandowska, F Tsvetkov, Howard J. Hanley, Thomas J. Bruno

Heats of adsoption for a series of hydocarbons on Laponite-RD clay were determined by two gas chromatographic methods. The first method was an extension of...

How Good Are Force Fields for Gas-Phase Protonated Peptides?

October 16, 2008

Author(s)

Christopher Kinsinger, Karl K. Irikura

With the increase in mass-spectrometry-based proteomics, many research projects depend on the chemistry of peptide fragmentation. Elucidating fragmentation...

Was this page helpful?