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Journals

Coordination Studies of Al-EDTA in Aqueous Solution

October 16, 2008

Author(s)

Orkid Coskuner, Emily A. Jarvis

The degree of aluminum toxicity is based on its complexation with organic ligands. One of these complexes is the AlEDTA- (Al=aluminum, EDTA...

High Precision Multiple keV X-Ray Analysis: Part I. Tests of K-Shell Ionization Cross

October 16, 2008

Author(s)

J T. Armstrong, Dale E. Newbury, Paul Carpenter

To evaluate which models of x-ray emission and ionization cross section give the most accurate results when applied to quantitative x-ray emission measurements...

Modern Applications for Single Nanopores. Can We Teach Old Proteins New Tricks?

October 16, 2008

Author(s)

John J. Kasianowicz

N/A

Nanoscale Mechanisms of Fatigue in Ionic Solids

October 16, 2008

Author(s)

Emily Jarvis, E A. Carter

We employ periodic density functional calculations to explore the effect of cyclic tensile loading on the behavior of alumina in the threshold region of crack...

A New Chemical Reactor for Protein Crystal Growth

October 16, 2008

Author(s)

David Travis Gallagher, C Stover, J Moses, D Charlton, E Steinberg, L Arnowitz

Current rapid advances in the genomic and biochemical sciences provide impetus for finding improved ways of crystallizing proteins for structure determination...

Determination of Sulfur In Fossil Fuels: User Prepared Standards With Concentrations And Uncertainties Traceable to NIST Values

October 16, 2008

Author(s)

William R. Kelly, Bruce S. MacDonald, Stefan D. Leigh

A procedure is presented whereby, the fossil fuel SRM user community could mix SRMs in different proportions and thereby, produce in their laboratory CRMs for...

Report from the NIST-MAS Workshop on The Accuracy Barrier in Quantitative EPMA and the Role of Standards

October 16, 2008

Author(s)

Dale E. Newbury, Ryna B. Marinenko, J T. Armstrong, John A. Small, Eric B. Steel

stract is attached.

Reference Material 8785: Air Particulate Matter on Filter Media

October 16, 2008

Author(s)

George A. Klouda, James J. Filliben, H J. Parish, J C. Chow, J Watson, R Cary

Reference Material (RM) 8785 Air Particulate Matter on Filter Media is intended primarily for use in the evaluation of analytical methods used to characterize...

A Hydrogen-Roaming Pathway for Formation of Methane in the 193 nm Photodissociation of Propene; CH₃CH=CH₂ and CD₃CD=CD₂

October 16, 2008

Author(s)

Yi-Lei Zhao, Allan H. Laufer, Joshua Halpern, Askar Fahr

Photodissociation channels and the final product yields from the 193 nm photolysis of propene-h6 (CH2=CHCH3) and propene-d6 (CD2=CDCD3) have been investigated...

Secondary Ion Mass Spectrometry Isotope Ration Data of Uranium Oxide Particles and Detection of Groupings

October 16, 2008

Author(s)

Albert J. Fahey, J Greg Gillen

Secondary ion mass spectrometry (SIMS) has been used in an automated way to survey a large number of particles to find isotopically rare materials and...

Origin of Discrepancies in Inelastic Electron Tunneling Spectra ofMolecular Junctions

October 16, 2008

Author(s)

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

We report inelastic electron tunneling spectroscopy (IETS) of multilayer molecular junctions with and without incorporated metal nano-particles. The...

Computer Assisted Expert Evaluation of NIST/NIH/EPA Mass Spectral Library

October 16, 2008

Author(s)

Anzor I. Mikaia, Stephen E. Stein, Vladimir G. Zaikin, D Zhu

The methods used to build a high quality, comprehensive reference library of positive ion EI mass spectra will be discussed. A description of the development of...

A Gravimetric Approach to the Standard Addition Method in Instrumental Analysis 1

October 16, 2008

Author(s)

William R. Kelly, Bruce S. MacDonald, William F. Guthrie

A general mathematical formulation for the method of standard additions is presented that has universal applicability. It is based on gravimetry rather than...

The New NIST Water Flow Calibration Facility

October 16, 2008

Author(s)

V S. Gowda, Tsyh Tyan Yeh, Pedro I. Espina, N Yende

A static-gravimetric liquid flow calibration facility is under construction at the NIST Gaithersburg Campus. The facility is designed to calibrate flow meters...

Neutron Irradiation in Activation Analysis: A New Rabbit for the NBSR

October 16, 2008

Author(s)

Richard M. Lindstrom, Rolf L. Zeisler, Elizabeth A. Mackey, P J. Liposky, Rachel S. Popelka-Filcoff, Robert E. Williams

Elementary activation analysis assumes that the reaction rate is proportional to the number of atoms of analyte present in the sample. On close examination...

A Systematically-Generated, Pressure-Dependent Mechanism for High-Conversion Ethane Pyrolysis. Part I: Pathways to the Minor Products

October 16, 2008

Author(s)

D M. Matheu, J M. Grenda

The deposition of carbon during hydrocarbon pyrolysis is part of many industrial processes. The rate and nature of deposition depend, in part, on the gas-phase...

Particle Characteristics of Trace High Explosives: RDX and PETN

October 16, 2008

Author(s)

Jennifer R. Verkouteren

The sizes of explosives particles in fingerprint residues produced from C-4 and Semtex-1A were investigated with respect to a fragmentation model. Particles...

Controlling the Morphology of Zinc Oxide Nanorods Crystallized From Aqueous Solutions: The Effects of Crystal Growth Modifiers on Aspect Ratio

October 16, 2008

Author(s)

Simon Garcia, Stephen Semancik

The effect of growth modifiers on the morphology of zinc oxide (ZnO) nanorods crystallized from solution is characterized. During hydrolysis of zinc nitrate at...

Unclenching Chorismate Lynse: Effects of the C90A Active Site Mutation and of Binding the Inhibitor Vanillate

October 16, 2008

Author(s)

David Travis Gallagher, N Smith, M P. Mayhew, Marcia J. Holden

Chorismate Lyase from E. coli is strongly product inhibited retaining the product 4-hydroxybenzoate internally by extensive hydrogen bonding.The biological...

Comment on Remarks on the Information Entropy Maximization Method and Extended Thermodynamics

October 16, 2008

Author(s)

B Robertson

A recent paper by B. C. Eu discusses maximum entropy Jaynes, 1957}, the projection-operator technique, Zwanzig, 1960} and extended thermodynamics. It analyzes a...

The Disputed Discovery of Element 43: A Reexamination of an Elegant Early Use of Wavelength-Dispersive X-Ray Microanalysis

October 16, 2008

Author(s)

J T. Armstrong, P H. Van Assche

In 1925, Noddack, Tacke and Berg reported discovery of element Z = 43, which they named Masurium, based on line identification of x-ray emission spectra from...

Cloning and Characterization of Adenylyl Cyclase from Mycobacterium Tuberculosis H37Rv Reveals its Homology to the Eukaryotic Enzyme

October 16, 2008

Author(s)

M A. Kamireddi, K. Dhanireddi, A M. Davis, Prasad T. Reddy

The deduced amino acid sequence (443 aa) encoded by the adenylyl cyclase gene from the human pathogen Mycobaterium tuberculosis H37Rv (Mtb AC) is hypothesized...

Improved Performance in Electron-Excited Energy Dispersive X-Ray Spectrometry With the Silicon Drift Detector (SDD): Output Count Rates Above 100 kHz With Application to X-Ray Imaging

October 16, 2008

Author(s)

Dale E. Newbury

Energy dispersive x-ray spectrometry (EDS) is a key characterization method in electron beam instruments: the scanning electron microscope (SEM), analytical...

Electron Microprobe Characterization of Si-Ge Alloys and Films for Use as Microanalysis Reference Materials

October 16, 2008

Author(s)

Ryna B. Marinenko, Shirley Turner, Dale E. Newbury, Robert L. Myklebust, Lee L. Yu, Rolf L. Zeisler, David S. Simons, John A. Small

Bulk SiGe wafers cut from single-crystal boules and SiGe thick films on Si wafers were evaluated with the electron probe microanalyzer for the extent of...

Discrimination Between Wild-Type and Ampicillin-Resistant Escherichia coli by Matrix-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry

October 16, 2008

Author(s)

Johanna Camara

Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) was optimized to discriminate between wild-type and ampicillin...

Summary of ISO/TC 201 Standard: XXIX. ISO 20903: 2006 - Surface Chemical Analysis - Auger Electron Spectroscopy and X-Ray Photoelectron Spectroscopy - Methods Used to Determine Peak Intensities and Information Required When Reporting Results

October 16, 2008

Author(s)

Cedric J. Powell

This article is a brief summary of ISO Standard 20903. This standard provides information on methods for the measurement of peak intensities in Auger electron...

Isodesmic Reactions for Transition States: Reactions of Cl Atoms With Methane and Halogenated Methanes

October 16, 2008

Author(s)

Vadim D. Knyazev

The performance of the technique of isodesmic reactions for transition states has been analyzed via application to 17 reactions of abstraction of hydrogen atoms...

A Universal Algorithm for Calculating the Backscattering Factor in Auger Electron Spectroscopy

October 16, 2008

Author(s)

Cedric J. Powell, Aleksander Jablonski

We describe a universal Monte Carlo algorithm that can be used for the efficient calculation of backscattering factors (BFs) for quantitative Auger-electron...

The Discovery of Type-IV Binary Fluid Phase Behavior

October 16, 2008

Author(s)

Johanna Levelt Sengers

The analysis by Scott and Van Konynenburg of the binary Van der Waals mixture for constant excluded volume uncovered the Type-IV phase diagram as a transition...

Accuracy Issues in Chemical and Dimensional Metrology in the SEM and TEM

October 16, 2008

Author(s)

J H. Scott

In this work computer simulations are used to understand systematic errors and accuracy concerns in both dimensional and chemical metrology in the scanning...

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