Zobrazeno 1 - 10 of 16 pro vyhledávání: '"Ruben G. M. Moreno"'
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Akademický článek
Lesões em DNA induzidas pela autoxidação de S(IV) na presença de íons metálicos de transição
Autor: Ruben G. M. Moreno, María V. Alipázaga, Marisa H. G. Medeiros, Nina Coichev
Publikováno v: Química Nova, Vol 29, Iss 5, Pp 1086-1093 (2006)
The oxidation of sulfite catalyzed by transition metal ions produces reactive oxysulfur species that can damage plasmid and isolated DNA in vitro. Among the four DNA bases, guanine is the most sensitive to one-electron oxidation promoted by the speci
Externí odkaz: https://doaj.org/article/d0ff4ae96a1a4773b8e8e892686aee8b
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3
DNA damage and 2′-deoxyguanosine oxidation induced by S(IV) autoxidation catalyzed by copper(II) tetraglycine complexes: Synergistic effect of a second metal ion
Autor: Nina Coichev, María V. Alipázaga, Edlaine Linares, Ruben G. M. Moreno, Osmar F. Gomes, Marisa Helena Gennari de Medeiros
Publikováno v: Journal of Inorganic Biochemistry. 101:866-875
S(IV) (SO(2),HSO(3)(-)andSO(3)(2-)) autoxidation catalyzed by Cu(II)/tetraglycine complexes in the presence of DNA or 2'-deoxyguanosine (dGuo) resulted in DNA strand breaks and formation of 8-oxo-7,8-dihydro-2'-deoxyguanosine (8-oxodGuo), respectivel
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1ba0d54589c97a8d1641cc1014d7e48e
https://doi.org/10.1016/j.jinorgbio.2007.02.003
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4
Lesões em DNA induzidas pela autoxidação de S(IV) na presença de íons metálicos de transição
Autor: María V. Alipázaga, Nina Coichev, Ruben G. M. Moreno, Marisa Helena Gennari de Medeiros
Publikováno v: Química Nova, Vol 29, Iss 5, Pp 1086-1093 (2006)
Química Nova v.29 n.5 2006
Química Nova
Sociedade Brasileira de Química (SBQ)
instacron:SBQ
Química Nova, Volume: 29, Issue: 5, Pages: 1086-1093, Published: OCT 2006
The oxidation of sulfite catalyzed by transition metal ions produces reactive oxysulfur species that can damage plasmid and isolated DNA in vitro. Among the four DNA bases, guanine is the most sensitive to one-electron oxidation promoted by the speci
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ada431c07610d58769056bdbd3e9a575
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422006000500032&lng=en&tlng=en
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5
Synergistic effect of Ni(ii) and Co(ii) ions on the sulfite induced autoxidation of Cu(ii)/tetraglycine complex
Autor: María V. Alipázaga, Nina Coichev, Ruben G. M. Moreno
Publikováno v: Dalton Trans.. :2036-2040
The synergistic effect of Ni(II) and Co(II) on the sulfite induced autoxidation of Cu(II)/tetraglycine was investigated spectrophotometrically at 25.0 degrees C, pH = 9.0, 1 x 10(-5) mol dm(-3)or = [S(IV)]or = 8 x 10(-5) mol dm(-3), [Cu(II)]= 1 x 10(
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1c9397533093637905c7dc11c5e28541
https://doi.org/10.1039/b404047c
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6
An electrochemical flow-cell for permanent modification of graphite tube with palladium for mercury determination by electrothermal atomic absorption spectrometry
Autor: Elisabeth de Oliveira, Ruben G. M. Moreno, Jairo J. Pedrotti, Pedro Vitoriano de Oliveira
Publikováno v: Spectrochimica Acta Part B: Atomic Spectroscopy. 57:769-778
An electrochemical procedure for palladium deposition on the inner surface of pyrolytic graphite-coated tubes for permanent chemical modification and a cold vapor generation system for the pre-concentration and determination of mercury trace levels i
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f268c04a011419f47564e3f410886002
https://doi.org/10.1016/s0584-8547(02)00009-5
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7
An electrochemical flow cell for permanent modification of graphite tube employed in atomic absorption
Autor: Pedro Vitoriano de Oliveira, Jairo J. Pedrotti, Elisabeth de Oliveira, Ruben G. M. Moreno
Publikováno v: Química Nova, Vol 24, Iss 3, Pp 404-407 (2001)
Química Nova, Volume: 24, Issue: 3, Pages: 404-407, Published: JUN 2001
Química Nova v.24 n.3 2001
Química Nova
Sociedade Brasileira de Química (SBQ)
instacron:SBQ
A flow cell assembled on the original geometry of a graphite tube to achieve permanent chemical modifier is proposed. The graphite tube operates as the working electrode. A stainless steel tube, positioned downstream from the working electrode, was u
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d0271bdf5aa5d4030a021275ca04d717
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422001000300018
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8
Further studies on the synergistic effect of Ni(II) and Co(II) ions on the sulfite induced autoxidation of Cu(II) penta and hexaglycine complexes
Autor: María V. Alipázaga, Luciana Batista de Carvalho, Nina Coichev, Ruben G. M. Moreno
Publikováno v: Journal of the Brazilian Chemical Society, Volume: 18, Issue: 6, Pages: 1247-1253, Published: 2007
Journal of the Brazilian Chemical Society v.18 n.6 2007
Journal of the Brazilian Chemical Society
Sociedade Brasileira de Química (SBQ)
instacron:SBQ
The autoxidation of Cu(II)/penta and hexaglycine complexes at pH = 9 is very slow showing a large induction period (about 4 h). The presence of S(IV) practically does not affect the rate of this reaction. Addition of small amounts of Ni(II) or Co(II)
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::426056436b2133c0d967f890a619b0f0
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532007000600021&lng=en&tlng=en
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9
Oxidative DNA damage induced by autoxidation of microquantities of S(IV) in the presence of Ni(II)-Gly-Gly-His
Autor: Marisa Helena Gennari de Medeiros, María V. Alipázaga, Ruben G. M. Moreno, Edlaine Linares, Nina Coichev
Publikováno v: Dalton transactions (Cambridge, England : 2003). (23)
NiIIGGH (GGH = glycylglycylhistidine) reacts rapidly with S(IV), in air-saturated solution, to produce NiIIIGGH. A mechanism is proposed where initial NiIII oxidizes SO3(2-) to SO3*-, which reacts with dissolved oxygen to produce SO5*-, initiating ra
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ca96d93873f3fbacad10b6c1bb569411
https://pubmed.ncbi.nlm.nih.gov/16471054
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10
DNA damage induced by sulfite autoxidation catalyzed by copper(II) tetraglycine complexes
Autor: María V. Alipázaga, Nina Coichev, Marisa Helena Gennari de Medeiros, Ruben G. M. Moreno
Publikováno v: Dalton transactions (Cambridge, England : 2003). (6)
Copper(II)/(III) tetraglycine complexes were investigated for their ability to catalyze the autoxidation of sulfite resulting in oxidative DNA damage. The focus of this work is on DNA damage by Cu(III) and oxysulfur radicals formed by the oxidation o
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9948f2742618d6782d6cf999f6217f65
https://pubmed.ncbi.nlm.nih.gov/15739013
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