Zobrazeno 1 - 10
of 32
pro vyhledávání: '"Christopher F. Rodriquez"'
Autor:
and Alan C. Hopkinson, Houssain El Aribi, Galina Orlova, K. W. Michael Siu, David R. P. Almeida, Christopher F. Rodriquez
Publikováno v:
The Journal of Physical Chemistry B. 108:18743-18749
Dissociation chemistries of the primary fragment ions from the tripeptides, GAG and AGG, were examined both experimentally and theoretically, and compared with those from GGG [El Aribi, H.; Rodriqu...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::45a49cb90075cf383e456688d43194e4
https://doi.org/10.1021/jp046449m
https://doi.org/10.1021/jp046449m
Publikováno v:
Rapid Communications in Mass Spectrometry. 18:1798-1802
Molecular radical cations have proven to be difficult to generate from aliphatic peptides under electrospray ionization mass spectrometry (ESI-MS) conditions. For a family of small aliphatic peptides GGX, where X = G, A, P, I, L and V, these cations
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7df83e1598e370fc2ca2f088ceb3d7d4
https://doi.org/10.1002/rcm.1551
https://doi.org/10.1002/rcm.1551
Autor:
Christopher F. Rodriquez, Houssain El Aribi, Tamer Shoeib, K. W. Michael Siu, Yun Ling, and Alan C. Hopkinson
Publikováno v:
The Journal of Physical Chemistry A. 106:8798-8805
The binding energies at 0 K of sodium and silver ions to ammonia, methylamine, ethylamine, acetonitrile, and benzonitrile were determined using threshold collision-induced dissociation (CID) and molecular orbital calculations at the ab initio and den
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9cca976c7203647796050b0948360d61
https://doi.org/10.1021/jp020991y
https://doi.org/10.1021/jp020991y
Autor:
Christopher F. Rodriquez, Jeffrey C. Smith, K. W. Michael Siu, R. Natasha Grewal, Houssain El Aribi, Alan C. Hopkinson
Publikováno v:
International Journal of Mass Spectrometry. 219:89-99
Multiply-sodiated ions were observed by electrospraying oligoglycines and their N-acetylated and O-amidated derivatives in the presence of sodium hydroxide. These ions have all their hydrogens in the peptide linkages replaced by sodiums; one hydrogen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f0718567d00cfe9d513deddf07fa864f
https://doi.org/10.1016/s1387-3806(02)00561-4
https://doi.org/10.1016/s1387-3806(02)00561-4
Autor:
Alan C. Hopkinson, Vincenzo Addario, Yuzhu Guo, Giuseppe D. Ruggerio, Christopher F. Rodriquez, Yun Ling, Ivan K. Chu, K. W. Michael Siu
Publikováno v:
International Journal of Mass Spectrometry. 219:101-114
The proton affinities of the methyl esters of N -acetylated amino acids, Ac-Xxx-OMe, where Xxx is Gly, Leu, Phe, Pro, Glu and Arg have been calculated and characterized at B3LYP/6-31++G(d,p) and compared against experimentally measured values by the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a47bb6f8c128c414edc62dcc9a278402
https://doi.org/10.1016/s1387-3806(02)00564-x
https://doi.org/10.1016/s1387-3806(02)00564-x
Autor:
Houssain El Aribi, K. W. Michael Siu, and Alan C. Hopkinson, Yun Ling, Tamer Shoeib, Christopher F. Rodriquez
Publikováno v:
The Journal of Physical Chemistry A. 106:2908-2914
The binding enthalpies at 0 K of the silver ion to water, methanol, ethanol, diethyl ether, and acetone were calculated using density functional theory (DFT) using the hybrid B3LYP level of theory with the DZVP basis set; they were also measured usin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::51d1232f6bcc0c8cd654be190e249c9d
https://doi.org/10.1021/jp014005+
https://doi.org/10.1021/jp014005+
Publikováno v:
Journal of the American Chemical Society. 123:3006-3012
Proton migration in protonated glycylglycylglycine (GGG) has been investigated by using density functional theory at the B3LYP/6-31++G(d,p) level of theory. On the protonated GGG energy hypersurface 19 critical points have been characterized, 11 as m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b2137b9ee3cfbb00d95c259ca0d25af4
https://doi.org/10.1021/ja0015904
https://doi.org/10.1021/ja0015904
Autor:
Christopher F. Rodriquez, Tai-Chu Lau, Ivan K. Chu, Tamer Shoeib, Xu Guo, K. W. Michael Siu, Alan C. Hopkinson
Publikováno v:
Journal of the American Society for Mass Spectrometry. 12:163-175
Tandem mass spectrometry performed on a pool of 18 oligopeptides shows that the product ion spectra of argentinated peptides, the [b n + OH + Ag]+ ions and the [y n − H + Ag]+ ions bearing identical sequences are virtually identical. These observat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4fe2df25fd14c9176be975c7597b8d0d
https://doi.org/10.1016/s1044-0305(00)00216-6
https://doi.org/10.1016/s1044-0305(00)00216-6
Autor:
L Chen, Gabriela Mladenova, K W Siu, Edward Lee-Ruff, Christopher F. Rodriquez, Linda J. Johnston, Alan C. Hopkinson
Publikováno v:
The Journal of Organic Chemistry. 66:1109-1114
The substituted fluorenyl cation, 9-(diphenylmethyl)fluoren-9-yl cation (4), is formed under stable ion conditions (low temperature/strong acid) from its corresponding alcohol 3. This ion is transformed to a substituted diphenyl methyl cation 8 at am
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::51d87d90ce25341cecc1e4b58ccfd915
https://doi.org/10.1021/jo0009200
https://doi.org/10.1021/jo0009200
Publikováno v:
Physical Chemistry Chemical Physics. 3:853-861
Density functional calculations at B3LYP/DZVP were used to obtain structural information, relative free energies of different isomers and binding energies for the following reaction in the gas phase: M+ + (glycyl)nglycine → M–(glycyl)nglycine+, w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a62e19fee7f9669c5cc899c6129800f6
https://doi.org/10.1039/b008836f
https://doi.org/10.1039/b008836f