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Displaying 1926 - 1950 of 2086

Bioassay-Directed Fractionation and Chemical Characterization of One Organic Extract of Indoor Air Fine Particles from Xuan Wei, China with High Lung Cancer Mortality Rate

May 1, 1992

Author(s)

J. C. Chuang, Stephen Wise, S. Cao, J. L. Mumford

Standard Reference Materials for Trace Organic Contaminants in the Marine Environment

April 1, 1992

Author(s)

Stephen A. Wise, Michele M. Schantz, Reenie M. Parris, R. E. Rebbert, Bruce A. Benner Jr

Evaluation of Reversed-Phase Liquid Chromatography Columns for Recovery and Selectivity of Selected Carotenoids

March 20, 1992

Author(s)

K. S. Epler, Neal E. Craft, Lane C. Sander, Stephen Wise, R. Zeigler

Optimization of an Isocratic High-Performance Liquid Chromatographic Separation of Carotenoids

January 10, 1992

Author(s)

Neal E. Craft, J. H. Soares, Stephen Wise

Preparation and Analysis of a River Sediment Reference Material for the Determination of Trace Organic Constituents

January 1, 1992

Author(s)

R. E. Rebbert, S. N. Chesler, Franklin R. Guenther, B. J. Koster, Michele M. Schantz, Stephen Wise

Shape Discrimination in Liquid Chromatography Using Charge Transfer Phases

November 1, 1991

Author(s)

Lane C. Sander, Reenie M. Parris, Stephen A. Wise, P. Garrigues

Preparation and Analysis of a Frozen Mussel Tissue Reference Material for the Determination of Trace Organic Constituents

October 1, 1991

Author(s)

Stephen A. Wise, Bruce A. Benner Jr, Richard G. Christensen, B. J. Koster, J. Kurz, Michele M. Schantz, Rolf L. Zeisler

Electron impact mass spectra of substituted benzyl(1-allylcycloalkyl)amines and their cyclization products

September 1, 1991

Author(s)

Anzor I. Mikaia, SV Lantsetov, VV Kuznetsov, Alexey V. Varlamov, Nikolay A. Prostakov

Unusual behavior of spiro-benzoazepines and their precursors under electron ionization is discussed

Micro-Analysis of Explosives and Propellants by On-Line Supercritical Fluid Extraction/Chromatography with Triple Detection

April 1, 1991

Author(s)

A. Munder, Richard G. Christensen, Stephen Wise

Determination of Glycyrrhetinic Acid in Human Plasma by High Performance Liquid Chromatography

January 17, 1991

Author(s)

Jeanice M. Brown Thomas, Richard G. Christensen, R. Rieger, W. Malone, Willie E. May

Comparison of the Liquid Chromatographic Behavior of Selected Steroid Isomers Using Different Reversed-Phase Materials and Mobile Phase Compositions

January 1, 1991

Author(s)

M. Olsson, Lane C. Sander, Stephen Wise

Mass spectrometry of derivatives and heterocyclic analogues of 9,10-dihydroanthracene

January 1, 1991

Author(s)

Anzor I. Mikaia, Vladimir G. Zaikin, Alexey V. Varlamov, Nikolay A. Prostakov

Fragmentation of derivatives of 9,10-dihydroanthracene and of its heterocyclic analogues containing atoms of O, S, N, P, Si, As, Se and Te at positions 9 and/or 10 is examined. The conditions reviewed are electron impact and chemical ionization in positive

Comparison of Liquid Chromatography with Fluorescence Detection and Gas Chromatography/Mass Spectrometry for the Determination of Polycyclic Aromatic Hydrocarbons in Environmental Samples

December 1, 1990

Author(s)

Stephen A. Wise, L.R. Hilpert, G. D. Byrd, Willie E. May

Capillary Supercritical Fluid Chromatography of Explosives: Investigations on the Interactions Between the Analytes, the Mobile Phase, and the Stationary Phase

November 14, 1990

Author(s)

A. Munder, S. N. Chesler, Stephen Wise

Mass spectra of 10,10-dimethyl-9,10-dihydro-10-sila-2-azaanthracenes with heterocyclic substituents at C-9

September 1, 1990

Author(s)

Anzor I. Mikaia, Victor Shevtsov, Sergei Poshivalov, Alexey V. Varlamov

Major fragmentation of dihydrosilaazaanthracenes, contammg an azetidine substituent, spiro-3-lactam ring, or spirotetrahydrofuryl residue at C9 upon electron impact are due to the presence of these rings. The azetidine ring may be eliminated as a radical

Polycyclic Aromatic Hydrocarbon Emissions from the Combustion of Crude Oil on Water

September 1, 1990

Author(s)

Bruce A. Benner Jr, Nelson P. Bryner, Stephen A. Wise, George W. Mulholland, R. Lao, M. F. Fingas

Synthesis and properties of azoles and their derivatives.25. Electron impact mass spectra of nitro- and nitroalkyl-substituted 3-aryl-isoxazolines.

September 1, 1990

Author(s)

Anzor I. Mikaia, Andre Baranski

It is determined that dissociation of molecular ions of aryl-isoxazolines under electron ionization takes place primarily through the nitro- and halogen-containing groups. Detailed analysis of the most important fragmentation pathways are presented

Electron impact mass spectra of substituted b-nitrostyrenes

August 1, 1990

Author(s)

Anzor I. Mikaia, Andre Baranski

Peaks of characteristic ions in the electron ionization mass spectra of substituted β-nitrostyrenes are identified, and mechanisms of their formation are determined

Alaskan Marine Mammal Tissue Archival Project

July 1, 1990

Author(s)

Paul R. Becker, B. J. Koster, Stephen A. Wise, Rolf L. Zeisler

The Anomalous Behavior of Selected Methyl-Substituted Polycyclic Aromatic Hydrocarbons in Reversed-Phase Liquid Chromatography

July 1, 1990

Author(s)

Stephen A. Wise, Lane C. Sander, R. Lapouyade, P. Garrigues

14 C Source Apportionment Technique Applied to Wintertime Urban Aerosols and Gases for the EPA Integrated Air Cancer Project

June 1, 1990

Author(s)

George A. Klouda, Lloyd A. Currie, A. E. Sheffield, B, I. Diamondstone, Bruce A. Benner Jr., Stephen Wise, R. K. Stevens, R. G. Merrill