Browsing by Author "Bollo Dragnic, Soledad"
Now showing items 1-20 of 35
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de la Fuente, Elizabeth; Adura, Carolina; Kogan Bocian, Marcelo; Bollo Dragnic, Soledad (2012)The inhibition of aggregation and disaggregation effect of a β-sheet breaker was evaluated by in situ electrochemistry of the Aβ 1-42 peptide. The exposition of 10tyr residue was followed using a carbon nanotubes modified ...
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Mosquera, Nerly; Aguirre, María J.; Ruiz León, Domingo; García, Camilo; Arce, Roxana; Bollo Dragnic, Soledad (Sociedad Chilena de Química, 2017)Hydrogen peroxide (H2O2) plays an important role as an intermediary in different biological, chemical and environmental systems. It has been widely used as an oxidizing and antimicrobial agent, in germicides production and ...
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Yañez, C.; Araya, M.; Bollo Dragnic, Soledad (2010)For first time the complexation of bentazon (Btz) with native β-cyclodextrin (β-CD) and modified sulfobutylether-β-CD (SBE-CD) was studied by differential pulse voltammetry. In addition, a spectrophotometry UV-Visible study ...
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Venegas, C.; Yedinak, E.; Marco, J.; Bollo Dragnic, Soledad; Ruiz León, Domingo (Elsevier B.V., 2017)Co-doped stannates, Zn2-xCoxSnO4(0.5 <= x <= 1.5), were produced by ceramic synthesis starting from the ZnSnO4 phase. Morphology, structure, and composition of synthesized compounds were examined using scanning electron ...
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Cyclic voltammetric and EPR spectroscopic studies of benzodiazepines: Loprazolam and flunitrazepam Núñez Vergara, Luis; Bollo Dragnic, Soledad; Olea Azar, Claudio; Navarrete-Encina, Patricio; Squella Serrano, Juan (Elsevier, 1997)The present paper reports on the electrochemical characterization by cyclic voltammetry of two 1,4-benzodiazepines, loprazolam and flunitrazepam in protic, aprotic and mixed media. In protic media (ethanol + 15 mM citrate ...
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Bollo Dragnic, Soledad; Yáñez, Claudia; Sturm, Juan; Núñez Vergara, Luis; Squella Serrano, Juan (2003)Potassium ferricyanide (Fe(CN)6]3-) reduction and ferrocenemethanol (Fc-OH) oxidation at a β-cyclodextrin (β-CD)-modified gold electrode were investigated by cyclic voltammetry (CV) and scanning electrochemical microscopy ...
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Cyclic voltammetry and digital simulation of the electroreduction of ortho- and meta-nitro aryl ... Bollo Dragnic, Soledad; Núñez Vergara, Luis; Squella Serrano, Juan (1999)Cyclic voltammetry (CV) and digital simulation methods are utilized to elucidate the mechanism of electrochemical reduction of a series of nitro aryl 1,4-dihydropyridines in protic (aqueous) and mixed media. The experimental ...
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González-Segura, Karina; Cañete Rosales, Paulina; Del Rio, Rodrigo; Yáñez, Claudia; Ferreyra, Nancy F.; Rivas, Gustavo A.; Bollo Dragnic, Soledad (2012)The electrochemical response of a glassy carbon electrode modified with carbon nanotubes (CNT) dispersed in two solvents, water and DMF, and two polymers, chitosan and Nafion is reported. The films were homogeneous when ...
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Gutierrez, Fabiana; Mazario, Eva; Menéndez, Nieves; Herrasti, Pilar; Rubianes, María D.; Zagal Moya, José; Yañez, C.; Rivas, Gustavo; Bollo Dragnic, Soledad; Recio, F. (Wiley-VCH Verlag, 2018)We report the advantages of hybrid nanomaterials prepared with electrogenerated ferrites (MFe2O4; M: Co, Mn) and multi-walled carbon nanotubes (MWCNTs) or thermally reduced graphene oxide (TRGO) on the electro-reduction ...
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Calfumán, Karla; Aguirre, Maria Jesús; Cañete Rosales, Paulina; Bollo Dragnic, Soledad; Llusar, Rosa; Isaacs, Mauricio (Elsevier Ltd, 2011)This paper describes the electrochemical reduction of nitrite ion in neutral aqueous solution mediated by tetraruthenated metalloporphyrins (Co(II), Ni(II) and Zn(II)) electrostatically assembled onto a Nafion film previously ...
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Núñez Vergara, Luis; Bollo Dragnic, Soledad; Fuentealba Arcos, Jorge Patricio; Sturm Schaub, Juan; Squella Serrano, Juan (KLUWER ACADEMIC/PLENUM PUBL, 2002-04)Purpose. To characterize the electrochemical behavior of the photodegradation product of nifedipine, i.e., 2,6-dimethyl-4-(2-nitrosophenyl)-3,5-pyridine-carboxylic acid dimethyl ester (NPD) in different electrolytic media. ...
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Núñez Vergara, Luis; Bontá, M.; Sturm, J. C.; Navarrete Encina, Patricio; Bollo Dragnic, Soledad; Squella Serrano, Juan (PERGAMON-ELSEVIER SCIENCE, 2001-08-31)This paper reports a comprehensive study by tast polarography, d.p.p., and cyclic voltammetry on the electrochemical reduction in different electrolytic media of ortho- and meta-nitrotoluene derivatives. Controlled potential ...
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Bollo Dragnic, Soledad; Muñoz,; Núñez Vergara, Luis; Squella Serrano, Juan (2000)Tacrine, 9-amino-1,2,3,4-tetrahydroacridine, an antialzheimer's disease agent was electrochemically studied and a polarographic method for its quantitative determination in pharmaceuticals was developed. Tacrine was ...
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Squella Serrano, Juan; González, P.; Bollo Dragnic, Soledad; Núñez Vergara, Luis (KLUWER ACADEMIC/PLENUM PUBL, 1999-01)
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Núñez Vergara, Luis; Ortiz, Luis J.; Bollo Dragnic, Soledad; Squella Serrano, Juan (1997)This paper reports a comprehensive study by cyclic voltammetry on the electrochemical characteristics and the reactivity of the one-electron reduction product from a series of nitro aryl 1,4-dihydropyridines in mixed and ...
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Squella Serrano, Juan; Huerta, M; Bollo Dragnic, Soledad; Pessoa, H; Núñez Vergara, Luis (Elsevier, 1997)The electrochemical reduction of three nitrotetralone derivatives by tast and differential pulse polarography and cyclic voltammetry in a wide pH range was studied. In aqueous media, the reduction of mono- and dinitrotetralone ...
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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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Catalán, Mabel; Álvarez Lueje, Alejandro; Bollo Dragnic, Soledad (2010)In this study the interaction between new benzimidazole molecules, 2-(2-nitrophenyl)-1H-benzimidazole (NB) and N-benzoyl-2-(2-nitrophenyl)-benzimidazole (BNB), with dsDNA and ssDNA was assessed at pH 7.4. Using differential ...
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Cañete Rosales, Paulina; Álvarez Lueje, Alejandro; Bollo Dragnic, Soledad (Sociedad Chilena de Química, 2014)For the first time, the study of the effect of length and degree of oxidation of multi-walled carbon nanotubes (CNTs) on the electroanalytical DNA sensing properties of modified glassy carbon electrodes (GCEs) is reported. ...
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Luque, Guillermina L.; Ferreyra, Nancy F.; Granero, Adrián; Bollo Dragnic, Soledad; Rivas, Gustavo A. (2011)This work reports the electrochemical response of the complex between dsDNA and PEI formed in solution and at the surface of glassy carbon electrodes (GCE) modified with a dispersion of multi-walled carbon nanotubes in ...