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Topic Area: Chemistry

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Displaying records 921 to 930 of 1000 records.
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921. Incorporation of Non-Steady Unimolecular and Chemically Activated Kinetics into Complex Kinetic Schemes. 1. Isothermal Kinetics at Constant Pressure
Topic: Chemistry
Published: 5/20/1999
Authors: Vadim Dmitrievich Knyazev, Wing Tsang
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=100711

922. Comparison of Zeeman Background Corrected Atomic Absorption Spectrometric and Inductively Coupled Plasma Mass Spectrometric Detection of Trace Elements in Electrothermally Vaporized Serum
Topic: Chemistry
Published: 5/1/1999
Authors: A K Skipor, J J Jacobs, Lee Lijian Yu, J Black
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=100825

923. Development of a Triplasmatron Ion Source for the Generation of SF^d5^+ and F- Primary Ion Beams on an Ion Microscope Secondary Ion Mass Spectrometry Instrument
Topic: Chemistry
Published: 5/1/1999
Authors: John G Gillen, R Lance King, F Chmara
Abstract: A hot filament duoplasmatron ion source operating with argon has been modified by addition of an enclosed expansion cup mounted to the extraction side of the duoplasmatron anode. Using sulfur hexafluoride (SF^d6^) as a feed gas, this triplasmatron i ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=831074

924. Proceedings - International Workshop on Green Chemistry and Engineering: Global Collaborations
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 6337
Topic: Chemistry
Published: 5/1/1999
Author: Ellyn S. Beary
Abstract: The 2nd Annual Green Chemistry and Engineering Conference was held in Washington, DC in early July, 1998. After two days of technical presentations by international experts on cutting-edge technological advances in sustainable chemistry and engineer ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830004

925. Elemental and Molecular Imaging of Human Hair Using Secondary Ion Mass Spectrometry
Topic: Chemistry
Published: 4/1/1999
Authors: John G Gillen, S V. Roberson, C M. Ng, M Stranick
Abstract: Secondary ion mass spectrometry (SIMS) is used to image the spatial distribution of elemental and molecular species on the surface and in cross-sections of doped human hair using a magnetic sector SIMS instrument operated as an ion microprobe. Analy ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=831098

926. Fractal Dimension of Particle Outlines: Meaning, Utility, Limitations, Standard Images and Examples
Topic: Chemistry
Published: 4/1/1999
Author: David S. Bright
Abstract: Only a handful of shape parameters, such as aspect ratio and circularity, are in common use for characterizing individual microscopic particles. The fractal dimension, D, is seeing increased use as an additional shape parameter because particle shape ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=831092

927. Quantitative Absorption Measurements Using Cavity Ringdown Spectroscopy With Pulsed Lasers
Topic: Chemistry
Published: 4/1/1999
Authors: J P. Looney, Joseph Terence Hodges, Roger D van Zee
Abstract: The theory and implementation of quantitative gas phase absorption measurements based on cavity-ringdown spectroscopy with pulsed lasers is discussed. The response of ringdown cavities is modeled using an eigenmode description of the electromagnetic ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=831468

928. The Kilogram: Last remaining artifact
Topic: Chemistry
Published: 4/1/1999
Author: Zeina Jabbour Kubarych
Abstract: The unit of mass, the kilogram, is the last remaining basic unit defined by an artifact. Worldwide efforts are underway to replace the artifact-based definition with invariant alternatives. This paper describes briefly the history of the kilogram, th ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=820097

929. Monitoring the Destruction of Carbon Phases in Soils and Sediments for Sequential Chemical Extractions
Topic: Chemistry
Published: 3/1/1999
Authors: M K Schultz, S R. Biegalski, K G Inn, Lee Lijian Yu, W. C. Burnett, J. L. W. Thomas , G. E. Smith
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=100822

930. Shear-Induced Restructuring of Concentrated Colloidal Silica Gels
Topic: Chemistry
Published: 2/15/1999
Authors: H J Hanley, Chris D Muzny, B D. Butler, G C. Straty, J Bartlett, E. Drabarek
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=100685



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