Zobrazeno 1 - 10 of 24 pro vyhledávání: '"María V. Alipázaga"'
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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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2
Effect of some antioxidants on oxidative DNA damage induced by autoxidation of microquantities of sulfite in the presence of Ni(II)/Gly–Gly–L–His
Autor: María V. Alipázaga, Nina Coichev, Horacio Dorigan Moya
Publikováno v: Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
NiIIGGH (GGH, glycylglycyl-L-histidine) reacts rapidly with S(IV), in air-saturated solution, to produce NiIIIGGH. A mechanism is proposed where NiIII oxidizes to , which reacts with dissolved oxygen to produce , initiating radical chain reactions. D
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f024f19abb328c3a3bfefa22de94b0c9
https://doi.org/10.1080/00958972.2010.491544
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3
Rotating ring-disk voltammetric investigations on the degradation rate of the nickel(III)-glycylglycyl-L-histidine complex
Autor: María V. Alipázaga, Nina Coichev, Mauro Bertotti, Denise Lowinsohn
Publikováno v: Canadian Journal of Chemistry. 85:1064-1069
The voltammetric behavior of the Ni(II)/glycylglycyl-L-histidine complex and the degradation of the electrogenerated Ni(III) species were investigated by cyclic voltammetry. Results of electrochemical and spectrophotometric experiments indicated some
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c9c4d4e5efe0fd7e1974e3585fa89488
https://doi.org/10.1139/v07-128
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4
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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5
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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6
Studies on the stability of the electrochemically generated Cu(III)–triglycine complex
Autor: María V. Alipázaga, Mauro Bertotti, Denise Lowinsohn, Nina Coichev
Publikováno v: Electrochimica Acta. 49:1761-1766
The electrochemistry of Cu(II) in aqueous solutions containing triglycine has been investigated at glassy carbon surfaces. Experiments were carried out at the pH range comprising 7 and 10 and a correlation between the electrochemical behaviour and th
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8c94479bc24865ad85c5c0d9e0c55fa3
https://doi.org/10.1016/j.electacta.2003.12.007
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7
Indirect FIA Amperometric Determination of Sulphite Based on the Autocatalytic Generation of Cu 3+ Complexes
Autor: Mauro Bertotti, Denise Lowinsohn, María V. Alipázaga, Nina Coichev
Publikováno v: Microchimica Acta. 144:57-62
Sulphite was determined in alcoholic (wine) and non-alcoholic (fruit juice) samples using an indirect amperometric FIA method. The current measured at 0 V was proportional to the amount of the Cu3+ species chemically generated by the sulphite-induced
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::54de1e5694022459196afcc2caefa3e3
https://doi.org/10.1007/s00604-003-0107-0
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8
Sulfite induced autoxidation of Ni(ii) and Co(ii) tetraglycine complexes. Spectrophotometric and rotating ring-disc voltammetric studies
Autor: Mauro Bertotti, Denise Lowinsohn, María V. Alipázaga, Nina Coichev
Publikováno v: Dalton Trans.. :267-272
The oxidation of Ni(II) and Co(II) tetraglycine complexes in borate buffer aqueous solution, by dissolved oxygen, is strongly accelerated by sulfite. The formation of Ni(III) and Co(III) complexes with maximum absorbances at 327 and 265 nm, respectiv
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cf0a230dc738fb1fbc66e29bd3f1a154
https://doi.org/10.1039/b312195j
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9
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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10
Synergistic Effect of Some Transition Metal Ions on the Sulfite Induced Autoxidation of Cu(II)/Tetraglycine Complex. Analytical Applications
Autor: María V. Alipázaga, Nina Coichev
Publikováno v: Analytical Letters. 36:2255-2275
The present work describes an alternative spectrophotometric method for sulfite determination based on its effect of accelerating the oxidation of Cu(II)/tetraglycine complex by oxygen. The analytical range was (0.5–10)× 10−5 mol L−1 sulfite a
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ad0553fc597600a5fd2beb45da7bd057
https://doi.org/10.1081/al-120023717
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