Zobrazeno 1 - 10
of 44
pro vyhledávání: '"Michael L. Gross"'
Publikováno v:
Organometallics. 24:3125-3135
The unsubstituted phosphirenylium ion, cyclo-C2H2P+, was generated in the gas phase via an addition−ablation strategy employing a modified quadrupole ion-trap mass spectrometer. The reaction of gas-phase PBr+ with acetylene affords H2C2P+ as the so
Publikováno v:
Chemical Research in Toxicology. 17:1038-1046
An environmental, estrogen-like substance, bisphenol A (BPA), is the monomer for the production of polycarbonate plastics used in baby bottles, dental sealants, and as a major component of epoxy resin for the lining of food cans. The oxidation of BPA
Autor:
Ercole L. Cavalieri, Michael L. Gross, J. K. Gooden, Eleanor G. Rogan, Liang Chen, Jaeman Byun
Publikováno v:
International Journal of Mass Spectrometry and Ion Processes. :241-249
Dibenzo[c,g]carbazole is the first heterocyclic aromatic compound that is known to be activated by one-electron oxidation; the resulting radical cation intermediate reacts with DNA to form adducts. We synthesized reference DNA adducts and studied the
Autor:
Michael L. Gross, Randall C. Schatzman, Francis J. Schmitz, Ronnel Cabuslay, Ilan Vidavsky, Maureen Laney, Syed A. Abbas, Xiong Fu
Publikováno v:
Tetrahedron. 53:799-814
Six new acetylenic compounds, 1, 7–11, were isolated from the marin sponge Pellina triangulata. Structures were established using NMR spectroscopy and chemical degradation. Collisional activation decomposition (CAD) tandem mass spectrometry of the
Publikováno v:
International Journal of Mass Spectrometry and Ion Processes. :189-198
The C5H10 adduct ions from the two highly exothermic reactions of propene (C3H6) radical cations with neutral ethene (C2H4) and cyclopropane radical cation with ethene were isolated and detected by incorporating an r.f.-only-mode event into the FTMS
Autor:
Michael L. Gross, George W. Haas
Publikováno v:
Journal of the American Society for Mass Spectrometry. 7:82-92
Substituent effects were determined for the gas-phase base-catalyzed Claisen-Schmidt reaction of the acetone enolate anion and various para-substituted benzaldehydes. Under chemical ionization conditions, the adduct for the reaction was detected and
Publikováno v:
International Journal of Mass Spectrometry and Ion Processes. :239-246
Various gas-phase C8H10 radical cations were investigated by using tandem mass spectrometry (MS/MS) and by utilizing AM1, PM3 and MNDO semi-empirical computations. The dissociation properties of the radical cations of bicyclo[2,2,2]octa-2,4-diene (di
Publikováno v:
Polycyclic Aromatic Compounds. 5:87-94
Radical cations are known to take part in biological chemistry. For example, polycyclic aromatic hydrocarbons (PAH) may be activated to radical cations enroute to damaging DNA and causing cancer. Mass spectrometry can be used to generate radical cati
Publikováno v:
Polycyclic Aromatic Compounds. 6:215-222
Tandem mass spectrometry was used in the structure determinations of adducts formed between nucleosides and the potent carcinogen dibenzo[a,l]pyrene. Adducts expected to arise from both the one-electron oxidation mechanism and by the diol epoxide mec
Publikováno v:
Polycyclic Aromatic Compounds. 6:103-110
The mass spectrometric detection limits for guanine, adenine, and an adeninddimethylbenthracene adduct were greatly improved by converting the materials to pentafluorobenzyl derivatives, as well as by doing coaxial continuous flow-FAB (coaxial cf-Fas