Zobrazeno 1 - 10
of 25
pro vyhledávání: '"Carl S. Weisbecker"'
Publikováno v:
Journal of the American Society for Mass Spectrometry. 27:394-401
Carboxamides bearing an N–H functionality are known to undergo deprotonation under negative-ion-generating mass spectrometric conditions. Herein, we report that N–H bearing carboxamides with acidities lower than that of the hydroperoxyl radical (
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6e397d2a6c6ebc4878785f7708c6a7cd
https://doi.org/10.1007/s13361-015-1296-6
https://doi.org/10.1007/s13361-015-1296-6
Publikováno v:
The Journal of Organic Chemistry. 79:4378-4389
A dramatic "ortho effect" was observed during gas-phase dissociation of ortho-, meta-, and para-methoxybenzoate anions. Upon activation under mass spectrometric collisional activation conditions, anions generated from all three isomers undergo a CO2
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::04294ac53ae8e56115933754f18a924f
https://doi.org/10.1021/jo500234w
https://doi.org/10.1021/jo500234w
Publikováno v:
Journal of Mass Spectrometry. 49:195-200
Upon collisional activation, gaseous metal adducts of lithium, sodium and potassium oxalate salts undergo an expulsion of CO2, followed by an ejection of CO to generate a product ion that retains all three metals atoms of the precursor. Spectra recor
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::53fdc33e454977d80155b731d31b1f84
https://doi.org/10.1002/jms.3322
https://doi.org/10.1002/jms.3322
Publikováno v:
Rapid Communications in Mass Spectrometry. 25:681-688
Gaseous metal anions such as Na(-), K(-), Cs(-), and Ag(-) can be generated at ambient temperatures by the collision-induced dissociation of the anions of several dicarboxylic acid salts, including oxalate, maleate, fumarate, succinate, and glutamate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6fd930d4deb20c72aea24d4239955ac0
https://doi.org/10.1002/rcm.4913
https://doi.org/10.1002/rcm.4913
Publikováno v:
Chemometrics and Intelligent Laboratory Systems. 93:20-26
Lithographic offset inks are pigment dispersions that behave as pseudoplastic, thixotropic fluids. Printers, who use these fluids in offset printing, judge some aspects of ink quality using a set of practiced visual and tactile perceptions that are r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4b1f76ba50a0a8405c9bb7796c3ab7b4
https://doi.org/10.1016/j.chemolab.2008.03.004
https://doi.org/10.1016/j.chemolab.2008.03.004
Autor:
Carl S. Weisbecker, John A. Hibbs, John Ressler, Rahul L. Khade, Yong Zhang, Athula B. Attygalle, Freneil B. Jariwala
Publikováno v:
Journal of the American Society for Mass Spectrometry. 25(9)
We describe a diagnostic ion that enables rapid semiquantitative evaluation of the degree of oxygen contamination in the collision gases used in tandem mass spectrometers. Upon collision-induced dissociation (CID), the m/z 359 positive ion generated
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0f810e03ef5f14bbc677fee9c0ef1016
https://pubmed.ncbi.nlm.nih.gov/25001381
https://pubmed.ncbi.nlm.nih.gov/25001381
Publikováno v:
Journal of the American Society for Mass Spectrometry. 25(6)
Collision-induced fragmentation of protonated N-alkyl-p-toluenesulfonamides primarily undergo either an elimination of the amine to form CH3-(C6H4)-SO2 + cation (m/z 155) or an alkene to form a cation for the protonated p-toluenesulfonamide (m/z 172)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7c16f868c60f8fff85836fcd2e129be1
https://pubmed.ncbi.nlm.nih.gov/24676895
https://pubmed.ncbi.nlm.nih.gov/24676895
Publikováno v:
Journal of mass spectrometry : JMS. 49(3)
Upon collisional activation, gaseous metal adducts of lithium, sodium and potassium oxalate salts undergo an expulsion of CO2, followed by an ejection of CO to generate a product ion that retains all three metals atoms of the precursor. Spectra recor
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::ce215d09e5f2ff53f2b5c38c302b738b
https://pubmed.ncbi.nlm.nih.gov/24619545
https://pubmed.ncbi.nlm.nih.gov/24619545
Publikováno v:
Journal of the American Society for Mass Spectrometry. 24(8)
In addition to the well-known SO2 loss, there are several additional fragmentation pathways that gas-phase anions derived from N-phenyl benzenesulfonamides and its derivatives undergo upon collisional activation. For example, N-phenyl benzenesulfonam
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0696396ef715e179da13cd0c4f8f59e4
https://pubmed.ncbi.nlm.nih.gov/23780491
https://pubmed.ncbi.nlm.nih.gov/23780491
Publikováno v:
Chemistry of Materials. 8:2121-2127
Cadmium telluride nanoclusters were prepared by vapor-phase deposition of elemental tellurium in Na+−zeolite A, followed by partial exchange of the zeolite with aqueous Cd(NO3)2, and reduction with hydrogen at 450 °C. The stability of the nanoclus
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c1fdc6486c63432008b63f3a88b77224
https://doi.org/10.1021/cm960045s
https://doi.org/10.1021/cm960045s