Zobrazeno 1 - 10
of 111
pro vyhledávání: '"John E, Bartmess"'
Autor:
John E. Bartmess
Publikováno v:
PATAI'S Chemistry of Functional Groups. :1-27
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0084def0eb3ca3f3dc236aa9824d6bad
https://doi.org/10.1002/9780470682531.pat0979
https://doi.org/10.1002/9780470682531.pat0979
Publikováno v:
Rapid Communications in Mass Spectrometry. 34
Rationale Over the last ten years, helium direct analysis in real time time-of-flight mass spectrometry (He DART-TOFMS) has become an established technique in rapid screening of forensic drugs to decrease the time necessary to triage forensic drug ca
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::66e917adc99ff8879a43f4a86abee9b6
https://doi.org/10.1002/rcm.8558
https://doi.org/10.1002/rcm.8558
Publikováno v:
Journal of the American Society for Mass Spectrometry. 29:640-650
Nitrogen can be an inexpensive alternative to helium used by direct analysis in real time (DART), especially in consideration of the looming helium shortage. Therefore, the ionization mechanism of positive-ion N2 DART has been systematically investig
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3c45b5b55e92a7ec6c473d49d52cd046
https://doi.org/10.1007/s13361-017-1885-7
https://doi.org/10.1007/s13361-017-1885-7
Publikováno v:
Rapid communications in mass spectrometry : RCMREFERENCES. 34(1)
Over the last ten years, helium direct analysis in real time time-of-flight mass spectrometry (He DART-TOFMS) has become an established technique in rapid screening of forensic drugs to decrease the time necessary to triage forensic drug cases, there
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::e4d116781cfb7efde0665bf2d48abd14
https://pubmed.ncbi.nlm.nih.gov/31429149
https://pubmed.ncbi.nlm.nih.gov/31429149
Publikováno v:
Chemical Physics Letters. 732:136638
The photoelectron spectra of the linear CnH2n+1O− (n = 1–9) alkoxide anions are presented, building on previous reports pertaining to n = 1–3. The vertical detachment energies (VDE) and electron affinities (EA) show a monotonic increase with ca
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::74ca6061f87b7daeaabfe588633c3777
https://doi.org/10.1016/j.cplett.2019.136638
https://doi.org/10.1016/j.cplett.2019.136638
Autor:
Joel F. Liebman, John E. Bartmess
Publikováno v:
Structural Chemistry. 24:2035-2045
The effect on heats of formation, of conjoined or proximate functional groups which can interact via polar or resonance effects, is examined using the –CF3 group as a standard. Two metrics are applied: the difference in heat of formation of G–CF3
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b238e3aff74c9d34c667aa8328078e73
https://doi.org/10.1007/s11224-013-0296-z
https://doi.org/10.1007/s11224-013-0296-z
Autor:
John E. Bartmess, Richard M. Pagni
Publikováno v:
Chirality. 25:16-21
A theoretical investigation of the photochemistry of racemic compounds with circularly polarized light was undertaken. The exact solutions of the differential equations by numerical integration to the approximate solutions used in an earlier article
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::79c7bbcb8884192311bdb804c37b89b9
https://doi.org/10.1002/chir.22105
https://doi.org/10.1002/chir.22105
Autor:
Liguo Song, Kelsey D. Cook, Zhenqian Zhu, Mary Ellen P. McNally, John E. Bartmess, Ron M. Hoffman
Publikováno v:
Analytical Chemistry. 84:7547-7554
Although qualitative and/or semiquantitative real-time monitoring of chemical reactions have been reported with a few mass spectrometric approaches, to our knowledge, no quantitative mass spectrometric approach has been reported so far to have a cali
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6ef3ffd31ceb1a4436b259da77d74d87
https://doi.org/10.1021/ac3017136
https://doi.org/10.1021/ac3017136
Publikováno v:
Rapid Communications in Mass Spectrometry. 26:1320-1328
Rationale Differentiation of underivatized monosaccharides is essential in the structural elucidation of oligosaccharides which are closely involved in many life processes. So far, such differentiation has been usually achieved by electrospray ioniza
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8d61c2f6d68e482baa4926b0d51885fd
https://doi.org/10.1002/rcm.6229
https://doi.org/10.1002/rcm.6229
Publikováno v:
Tetrahedron. 67:9265-9272
A method for appending the ascorbyl moiety onto the framework of phenolic natural products has been developed. This reaction proceeds in two steps from l -ascorbic acid and employs acetic acid catalysis. Excellent stereoselectivity is observed during
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::df9b3f08adf60097a3fd900b51452b01
https://doi.org/10.1016/j.tet.2011.09.102
https://doi.org/10.1016/j.tet.2011.09.102