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Chemistry

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Displaying 951 - 975 of 1926

Development and Application of Multiple D-Layer Reference Materials for Semiconductor Analysis

January 1, 2005

Author(s)

K J. Kim, D Moon, P Chi, David S. Simons

The rapid progress in the semiconductor industry requires more precise in-depth profiling analysis of doping elements in narrower and shallower regions. Secondary ion mass spectrometry (SIMS) is the most popular technique for the depth distribution of

Global communications and expert systems in thermodynamics: Connecting property measurement and chemical process design

January 1, 2005

Author(s)

Michael D. Frenkel

This paper has been presented as a plenary Lecture at the Eighteenth International Conference on Chemical Thermodynamics held August 17-20, 2004, in Beijing,China. Unprecedented growth in the number of custom-designed software tools for engineering

Instrumental Neutron Activation Analysis: A Valuable Link in Chemical Metrology

January 1, 2005

Author(s)

Rolf L. Zeisler, Richard M. Lindstrom, Robert R. Greenberg

Nuclear Science Manpower and Education Panel

January 1, 2005

Author(s)

Rolf L. Zeisler, S B. Clark, S J. Parry, Susan F. Heller-Zeisler

Polycyclic Aromatic Hydrocarbons in Flames, in Diesel Fuels, and in Diesel Emissions

January 1, 2005

Author(s)

Robert A. Fletcher, R Dobbins, Bruce A. Benner Jr, S Hoeft

Diesel fuels and emissions are composed of numerous hydrocarbon species. Combustion generated or pyrogenic polycyclic aromatic hydrocarbons (PAHs) derived from premixed and diffusion flames often consists of the most stable benzenoid PAHs. In contrast

Submillimeter and THz Detection of Chemical-Warfare Agents in Air

December 31, 2004

Author(s)

Vyacheslav B. Podobedov, R J. Lavrich, T M. Korter, Gerald T. Fraser, David F. Plusquellic, A C. Samuels

Experimental measurements and theoretical calculations were performed to assess the potential for using continuous-wave submillimeter and THz (far-infrared) linear-absorption spectroscopies to detect chemical-warfare agents in air at ambient temperatures

Samples and Standards

December 13, 2004

Author(s)

Richard M. Lindstrom, C Yonezawa

For analytical accuracy, the detailed interaction of neutrons with the sample is of more importance in prompt-gamma activation analysis (PGAA) with a neutron beam than in conventional activation analysis. Selection of an optimum sample size and shape is

Monitoring Mercury in the Loggerhead Sea Turtle, Caretta caretta

December 10, 2004

Author(s)

Russell D. Day, Steven J. Christopher, Paul R. Becker, D W. Whitaker

Persistent Organic Pollutants in Two Dolphin Species with Focus on Toxaphene and Polybrominated Diphenyl Ethers

December 9, 2004

Author(s)

K. J. Tuerk, John R. Kucklick, Paul R. Becker, H M. Stapleton, J. E. Baker

An Accurate and Sensitive Method for the Determination of Methylmercury in Biological Specimens Using GC-ICPMS with Solid Phase Microexctraction

December 1, 2004

Author(s)

William C. Davis, Stacy S. Vander-Pol, Michele M. Schantz, Stephen E. Long, Steven J. Christopher

An Approach to the Metrologically Sound Traceable Assessment of the Chemical Purity of Organic Reference Materials

December 1, 2004

Author(s)

David L. Duewer, Reenie M. Parris, Edward White, Willie E. May, H. Elbaum

Molecular Spectrometry Data Interchange Applications for NIST's SpectroML

December 1, 2004

Author(s)

Anh D. Nguyen, A Arslan, John C. Travis, Melody V. Smith, R Schaefer, Gary W. Kramer

NIST Mixed Stain Study 3: Signal Intensity Balance in Commercial Short Tandem Repeat Multiplexes

December 1, 2004

Author(s)

David L. Duewer, Margaret C. Kline, Janette W. Redman, John M. Butler

Organochlorine Contaminants in Loggerhead Sea Turtle Blood: Extraction Techniques and Distribution Among Plasma and Red Blood Cells

December 1, 2004

Author(s)

Jennifer M. Lynch, John R. Kucklick, P D. McClellan-Green

Persistent Organic Pollutants in Alaskan Murre (Uria spp.) Eggs: Geographical, Species, and Temporal Comparisons

December 1, 2004

Author(s)

Stacy S. Schuur, Paul R. Becker, John R. Kucklick, Rebecca S. Pugh, David G. Roseneau, K. S. Simac

Polybrominated diphenyl ether congers and toxaphene in selected marine standard reference materials

December 1, 2004

Author(s)

John R. Kucklick, K. J. Tuerk, Stacy S. Vander-Pol, Michele M. Schantz, Stephen A. Wise

Semiconductor nanocrystal probes for human chromosomes and DNA

December 1, 2004

Author(s)

Yan Xiao, Peter E. Barker

Standardization of Isotope Ratio Measurements for Doping Control

December 1, 2004

Author(s)

R M. Verkouteren

Pharmaceutical steroids are known to differ in isotopic composition from those produced naturally in the body. By measuring the 13 C/ 12C ratio of specific steroids deteched in urine, the technique of Gas Chromatography-Combustion-Isotope Ratio Mass