Výsledky vyhledávání - "Peter H. Krygsman"

Detection of alkyl, alkoxyl, and alkyperoxyl radicals from the thermolysis of azobis(isobutyronitrile) by ESR/spin trapping. Evidence for double spin adducts from liquid-phase chromatography and mass spectroscopy

Autor: David A. Lindsay, Peter H. Krygsman, D. Larry Haire, Edward G. Janzen

Publikováno v: Journal of the American Chemical Society. 112:8279-8284

The thermolysis of azobis(isobutyronitrile) (AIBN) in the presence of oxygen has been investigated by spin trapping by using {alpha}-phenyl N-tert-butyl nitrone (PBN) and 5,5-dimethylpyrroline N-oxide (DMPO). The aminoxyl products identified by ESR a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::dc9efb434339260819dc74524052ab51
https://doi.org/10.1021/ja00179a010

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Structure Identification of Free Radicals by Esr And Gc/Ms of Pbn Spin Adducts From theIn Vitroandin vivoRat Liver Metabolism Of Halothane

Autor: Edward G. Janzen, D. Larry Haire, J. Lee Poyer, Peter H. Krygsman, Rheal A. Towner

Publikováno v: Free Radical Research Communications. 9:343-351

Free radicals were detected from the in vitro metabolism of halothane (rat liver microsomes) by the PBN spin trapping method. The detected radical species include the 1-chloro-2,2,2-trifluoro-1-ethyl radical (I), as determined by mass spectral analys

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ca6defeb9c214384f10e51418a602fda
https://doi.org/10.3109/10715769009145693

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Thallium-205 and carbon-13 NMR studies of human sero- and chicken ovotransferrin

Autor: Peter H. Krygsman, James M. Aramini, Hans J. Vogel

Publikováno v: Biochemistry. 33(11)

We have examined the binding of TP+ to human serotransferrin and chicken ovotransferrin in the presence of carbonate and oxalate by 205Tl and 13C NMR spectroscopy. With carbonate as the synergistic anion, one observes two 2osTl NMR signals due to the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2e5393f9c262038962c21dc246b03ad3
https://pubmed.ncbi.nlm.nih.gov/8136366

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Mass spectroscopy and chromatography of the trichloromethyl radical adduct of phenyl tert-butyl nitrone

Autor: J. Lee Poyer, Edward G. Janzen, Rheal A. Towner, Edward K. Lai, Peter H. Krygsman, Paul B. McCay, Gemma Brueggemann

Publikováno v: Free radical research communications. 9(3-6)

Positive structural identification of the PBN-trichloromethyl spin adduct in vitro was accomplished with the use of high pressure liquid chromatography and/or gas chromatography coupled with mass spectrometry. Both thin layer and liquid chromatograph

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::05c45eb593095f903878bccad288cd29
https://pubmed.ncbi.nlm.nih.gov/2167273

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Enhanced Recognition of Spin Trapped Radicals In Complex Mixtures: Deuterated Nitronyl Adducts Provide A Gas Chromatographic/Mass Spectrometric Marker

Autor: D. Larry Haire, Peter H. Krygsman, Rheal A. Towner, Edward G. Janzen

Publikováno v: Analytical Letters. 22:1009-1020

The use of deuterated analogues of α-phenyl-N-tert-butyl nitrone (PBN) are reported for GC/MS analysis of spin trapping products. PBN-d9 and PBN-d41, deuterated in the tert-butyl group (the latter also deuterated in the phenyl ring), result in a mor

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f43efbb6b33cfb494bfd467d2a27acdb
https://doi.org/10.1080/00032718908051384

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The application of gas chromatographic/mass spectrometric techniques to spin trapping. Conversion of α-phenylN-tert-butyl nitrone (PBN) spin adducts to stable trimethylsilylated derivatives

Autor: D. Larry Haire, Peter H. Krygsman, Edward G. Janzen

Publikováno v: Biological Mass Spectrometry. 15:111-116

The reaction of an aminoxyl and the corresponding hydroxylamine with silylating agents is studied in detail. The gas chromatographic/mass spectrometric analysis of the products is consistent with the production of an unsaturated product when an alkyl

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a8e312c3e02508adb47c894afb44ff91
https://doi.org/10.1002/bms.1200150209

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