Zobrazeno 1 - 10 of 12 pro vyhledávání: '"John E. Bunch"'
1
Derivatization Solid-Phase Microextraction Gas Chromatographic--Mass Spectrometric Determination of Organic Acids in Tobacco
Autor: John E. Bunch, T. Jeffrey Clark
Publikováno v: Journal of Chromatographic Science. 35:209-212
Isovaleric, valeric, hexanoic, benzoic, phenylacetic, 3-methylvaleric, heptanoic, octanoic, and nonanoic acids are converted to their methyl esters and quantitated for flue-cured tobacco grades of increasing stalk position using derivatization headsp
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::50a17dcfb41511482f8e7bfabdfd7efd
https://doi.org/10.1093/chromsci/35.5.209
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2
Quantitative Determination of Phenols in Mainstream Smoke with Solid-Phase Microextraction-Gas Chromatography--Selected Ion Monitoring Mass Spectrometry
Autor: John E. Bunch, T. Jeffrey Clark
Publikováno v: Journal of Chromatographic Science. 34:272-275
A method that uses solid-phase microextraction-gas chromatography-selected ion mode mass spectroscopy has been developed for the quantitative determination of phenolic compounds in cigarette smoke condensate. The concentrations of phenol, ο-, m-, an
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::926c51f90939fe58e599c0d3ebac380d
https://doi.org/10.1093/chromsci/34.6.272
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3
The Effects of Upholstery Fabric Properties on Fabric Ignitabilities by Smoldering Cigarettes. II
Autor: R.W. Dwyer, Shirley L. Smith, Arthur M. Ihrig, Dawn Furin, Leslie S. Lewis, Linda G. Fournier, Rufus H. Honeycutt, William Z. Hudson, John E. Bunch
Publikováno v: Journal of Fire Sciences. 13:445-471
Upholstery fabrics for residential use were obtained from various fabric shops and manufacturers' catalogs. Screening was conducted with four experimental cigarettes of varying design. By the National Institute of Stan dards and Technology (NIST) cot
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ea50d2330ad117c5ff51653289802c58
https://doi.org/10.1177/073490419501300603
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5
Determination of Volatile Acids in Tobacco, Tea, and Coffee Using Derivatization--Purge and Trap Gas Chromatography--Selected Ion Monitoring Mass Spectrometry
Autor: John E. Bunch, T. Jeffrey Clark
Publikováno v: Journal of Chromatographic Science. 35:206-208
Short-chain organic acids from agricultural products are simultaneously extracted and derivatized using methanolic hydrochloric acid. Acetic, isobutyric, butyric, isovaleric, valeric, hexanoic, 3-methylvaleric, heptanoic, and nonanoic acids are quant
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b1a069b2c0bb2d18e892b25d473c39d8
https://doi.org/10.1093/chromsci/35.5.206
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6
On the role of the CF3 group in determining the relative stability of E, Z-isomers
Autor: John E. Bunch, Myung-Hwan Whangbo, Carl L. Bumgardner
Publikováno v: Tetrahedron Letters. 27:1883-1886
Although base-catalyzed addition of PhSH to PhCCCF, under thermodynamic control gives E-Ph(PhS)CCH(CF3), Z-Ph(PhO)CCH(CF3) is the thermodynamically favored product from similar reaction of PhOH with PhCCCF3. The preference for the cis -co
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0d620d4804ffafbda206a26b2a4b6b41
https://doi.org/10.1016/s0040-4039(00)84401-9
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