Browsing by Author "Squella Serrano, Juan"
Now showing items 81-100 of 231
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Bollo Dragnic, Soledad; Gunckel, S.; Núñez Vergara, Luis; Chauviere, G.; Squella Serrano, Juan (WILEY-V C H VERLAG GMBH, 2005-02)The electrochemical behavior of three different megazol analogues substituted at position 4 and their comparison with the parent compound megazol in protic and aprotic media by cyclic voltarnmetry, Tast and differential ...
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Squella Serrano, Juan; Sturm Schaub, Juan; Weiss López, Boris; Bontá, M.; Núñez Vergara, Luis (ELSEVIER SCIENCE, 1999-05-14)The electrochemical reduction of a series of beta-nitrostyrene and beta-methyl-beta-nitrostyrene derivatives: by tast and differential pulse polarography and cyclic voltammetry over a wide pH range was studied. The reduction ...
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Álvarez Lueje, Alejandro; Peña, C.; Núñez Vergara, Luis; Squella Serrano, Juan (WILEY-V C H VERLAG GMBH, 1998-11)Flutamide, 4-nitro-3-trifluoromethyl-isobutylanilide a synthetic antiandrogenic with therapeutic use in prostatic cancer, is electrochemically studied to propose a new electroanalytical alternative for its quantitative ...
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Álvarez Lueje, Alejandro; Naranjo, Luis; Núñez Vergara, Luis; Squella Serrano, Juan (PERGAMON-ELSEVIER SCIENCE, 1998-01)The anodic and cathodic behavior of nisoldipine, 3-isobutyl-5-methyl-1,4-dihydro-2,6-dimethyl-4-(2-nitrophenyl)pyridine-3,5-dicarboxylate, are reported. This drug belongs to the nitroaryl-1,4-dihydropyridine family, known ...
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Electrochemical study of nitrostilbene derivatives: nitro group as a probe of the push-pull effect Bollo Dragnic, Soledad; Núñez Vergara, Luis; Soto Bustamante, Eduardo; Squella Serrano, Juan (ELSEVIER SCIENCE, 2000-09-29)This paper reports electrochemical (tast polarography, differential pulse polarography, cyclic voltammetry) and spectroscopic investigations covering a series of stilbene derivatives having either one or two electron-donating ...
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Squella Serrano, Juan; Berguecio, María; Hernández, A.; Cassels Niven, Bruce; Núñez Vergara, Luis (Elsevier , Science Ltd., 1991-11-26)A set of 2,5-dimethoxyamphetarnines differing in their substitution at C4 was studied by differential pulse voltammetry and linear scan cyclic voltammetry in aqueous media. These experiments showed a single oxydation ...
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Squella Serrano, Juan; Núñez Vergara, Luis (1981)
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Squella Serrano, Juan; Bollo Dragnic, Soledad; Fuente Urrutia, Julio de la; Núñez Vergara, Luis (1994)The cyclic voltammetric behavior of nicardipine was studied. Particular attention was directed to the one-electron ArNO2/ArNO2•- couple as measured by the cyclic voltammetric mode in aqueous DMF mixed media. Analysis of ...
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Squella Serrano, Juan; Sturm, J. C.; Weiss López, Boris; Bontá, M.; Núñez Vergara, Luis (Elsevier Sequoia SA, 1999)The electrochemical reduction of a series of β-nitrostyrene and β-methyl-β-nitrostyrene derivatives by tast and differential pulse polarography and cyclic voltammetry over a wide pH range was studied. The reduction potentials ...
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De Souza, Antonio A.; De Moura, Maria Aline B.F.; De Abreu, Fabiane C.; Goulart, Marília O. F.; Da Silva, Eufrânio N.; Pinto, Antonio V.; Ferreira, Vitor F.; Moscoso Cabello, Raúl Andrés; Núñez Vergara, Luis; Squella Serrano, Juan (2010)The electrochemistry of 2,2-dimethyl-(3H)-3-(N-3'-nitrophenylamino) naphtho[1,2-b]furan-4,5-dione ([Q]-PhNO2), on mercury was investigated. The first peak is consistent with a quasi-reversible one-electron reduction of the ...
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Núñez Vergara, Luis; Sturm Schaub, Juan; Olea Azar, Claudio; Navarrete Encina, Patricio; Bollo Dragnic, Soledad; Squella Serrano, Juan (HARWOOD ACAD PUBL GMBH, 2000)This paper deals with the reactivity of the nitro radical anion electrochemically generated from nitrofurantoin with glutathione. Cyclic voltammetry (CV) and controlled potential electrolysis were used to generate the nitro ...
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Barrientos, C; Navarrete Encina, P.; Squella Serrano, Juan (Electrochemical Soc Inc, 2020)The present studies reveal superoxide radical anion reactivity against synthesized coumarins. Free radicals play an important role in many diseases and they have a protective function also. Therefore, we must keep a balance ...
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Urzúa, J.; Carbajo, J.; Yánez, C.; Marco, J. F.; Squella Serrano, Juan (Springer, 2016)We report that glassy carbon electrodes (GCE) modified with multi-walled carbon nanotubes (MWCNTs) can be derivatized with 2,7-dinitro-9-fluorenone (2,7-NFN). The derivatization procedure involves simple immersion of the ...
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Retamales Castro, Pía (Universidad de ChileCyberDocs, 2010)
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Moscoso Cabello, Raúl Andrés (Universidad de Chile, 2015)Los electrodos basados en nanotubos de carbono como material electródico, tienen múltiples ventajas; su bajo costo, buena conductividad eléctrica, un amplio rango de potencial, presentan actividad electro-catalítica muchas ...
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Electrogeneration of nitranion species from nitrofuryl substituted 1,4-dihydropyridine derivatives Argüello da Silva, Jacqueline; Núñez Vergara, Luis; Squella Serrano, Juan (ELSEVIER SCIENCE, 2005-01)We have synthesized and studied the electroreduction of 1,4-dihydropyridine derivatives with a nitrofuryl substituent at 4-position. The one-electron reduction of these compounds in non-aqueous medium generates the ...
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Núñez Vergara, Luis; Salazar González, Ricardo Andrés; Navarrete Encina, Patricio; Camargo Grandón, Rodrigo; Yáñez Soto, Claudia; Squella Serrano, Juan (ELECTROCHEMICAL SOC, 2007)A study of the electrolytic oxidation of three new C-4 nitrofuryl 1,4-dihydropyridines in nonaqueous aprotic medium is presented. Controlled-potential electrolysis (CPE) in dimethylformamide +0.1 M tetrabutyl-ammonium ...
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Squella Serrano, Juan; Jimenez,; Bollo Dragnic, Soledad; Núñez Vergara, Luis (Elsevier Ltd, 1997)Electrochemical studies on 4-(nitrophenyl) substituted 1,4-dihydropyridines of pharmacological importance have allowed us to generate the one-electron reduction product, the nitro radical anion, ArNȮ- 2 , in aprotic media. ...
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Squella Serrano, Juan; Álvarez Lueje, Alejandro; Sturm,; Núñez Vergara, Luis (1993)A differential pulse polarographic method for the identification and quantitative determination of enoxacin is described. The method is based on the electrochemical reduction of the drug at the dropping mercury electrode. ...
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Salgado Figueroa, Paola Johanna (Universidad de Chile, 2013)El uso de antibacterianos de tipo nitrofurano en animales que serán utilizados como productos de consumo humano en cualquiera de sus etapas, se encuentra prohibido a nivel mundial. Debido a esto se hace necesario realizar ...