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Chemistry

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Published Date
Displaying 951 - 975 of 1934

High Spatial Resolution Quantitative Electron Beam Microanalysis for Nanoscale Materials

March 21, 2005
Author(s)
Dale E. Newbury, J H. Scott, Scott A. Wight, J T. Armstrong, John A. Small
Transmission (TEM) and scanning electron microscopes (SEM) provide ideal platforms for electron and x-ray spectrometry to characterize nanoscale particles and nanostructured bulk materials. Electron spectrometry includes electron energy loss spectrometry

Thermal decomposition kinetics of RP-1 rocket propellant

March 16, 2005
Author(s)
Peter C. Andersen, Thomas J. Bruno
As part of a thermophysical and transport property measurement project, the global decomposition kinetics of the kerosene based rocket propellant, RP-1, was investigated. We measured the decomposition of RP-1 at elevated temperatures (that is, under

Thermodynamic Properties of 2-Methylquinoline and 8-Methylquinoline

February 9, 2005
Author(s)
Robert D. Chirico, William Steele
Measurements leading to the calculation of the standard thermodynamic properties for gaseous 2-methylquinoline (Chemical Abstracts registry number [91-63-4]) and 8 methylquinoline (Chemical Abstracts registry number [611-32-5]) are reported. Experimental

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
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