James J. Sullivan
Hewlett-Packard
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Featured researches published by James J. Sullivan.
Pure and Applied Chemistry | 1996
Eric Block; Xiao-Jia Cai; Peter C. Uden; Xing Zhang; Bruce D. Quimby; James J. Sullivan
By using the technique of gas chromatography with atomic emission detection (GC-AED), a variety of low molecular weight organoselenium and mixed organosulfur-organoselenium compounds have been identified in natural abundance in the headspace above chopped AZZium and Brussicu spp. and in human breath after ingestion of garlic. Selenoamino acid precursors to these organoselenium volatiles have been identified in these plants using the same
Journal of Chromatography A | 1973
James J. Sullivan
Abstract A theoretical upper limit of electron attachment rate constants is derived, based on collision-limited electron interaction with polarizable molecules. This limit is shown to give upper limits for electron capture response factors. Evidence is presented showing that this limit is approached to within a factor of two for a wide variety of highly electrophilic compounds. It is suggested that this limit can be used as an approximation for electron capture response factors for suitable compounds, and that properly chosen derivatizing reagents may allow detection of derivatives with fairly accurate prediction of response factors.
Analytical Proceedings | 1994
Xiao-Jia Cai; Peter C. Uden; James J. Sullivan; Bruce D. Quimby; Eric Block
A novel inlet headspace sampler interfaced with gas chromatography was used to determine trace levels of volatile organoselenium compounds in garlic flavorants. Volatiles from crushed garlic were detected by atomic plasma emission and mass spectroscopy.
Analytical Chemistry | 1990
Bruce D. Quimby; James J. Sullivan
Journal of Agricultural and Food Chemistry | 1995
Xiao-Jia Cai; Eric Block; Peter C. Uden; Xing Zhang; Bruce D. Quimby; James J. Sullivan
Analytical Chemistry | 1990
James J. Sullivan; Bruce D. Quimby
Journal of Agricultural and Food Chemistry | 1995
Xiao-Jia Cai; Eric Block; Peter C. Uden; Bruce D. Quimby; James J. Sullivan
Journal of Agricultural and Food Chemistry | 1994
Xiao-Jia Cai; Peter C. Uden; Eric Block; Xing Zhang; Bruce D. Quimby; James J. Sullivan
Hrc-journal of High Resolution Chromatography | 1989
James J. Sullivan; Bruce D. Quimby
Hrc-journal of High Resolution Chromatography | 1990
Philip L. Wylie; James J. Sullivan; Bruce D. Quimby