Browsing by Author "Jara Ulloa, Paola Andrea"
Now showing items 1-11 of 11
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Ramírez, Eduardo Alejandro; Zon, María Alicia; Jara Ulloa, Paola Andrea; Squella Serrano, Juan; Núñez Vergara, Luis; Fernández, Héctor (PERGAMON-ELSEVIER SCIENCE LTD, 2010-01-01)We study the thermodynamics and kinetics of the adsorption of a redox couple having quinone nature on glassy carbon electrodes. This couple is produced by the anodic oxidation of mycotoxin ochratoxin A in 10% acetonitrile ...
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Jara Ulloa, Paola Andrea; Cañete Rosales, Paulina; Núñez Vergara, Luis; Squella Serrano, Juan (2011)1-Methyl-4-nitro-2-brominemethylimidazole (4-NimMeBr), was electrochemically reduced on mercury, glassy carbon and multiwalled carbon nanotubes (MWCNT) modified electrodes. 4-NimMeBr was adsorbed on the MWCNT modified ...
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Inclusion complexes of estrone and estradiol with beta-cyclodextrin: Voltammetric and HPLC studies Yáñez Soto, Claudia; Basualdo Legüe, Julio Manuel; Jara Ulloa, Paola Andrea; Squella Serrano, Juan (WILEY, 2007-07)The interaction of estrone and estradiol with beta-cyclodextrins (beta CD) was investigated by differential pulse voltammetry (DPV) and high-performance liquid chromatography (HPLC) in mixed media. The co-solvent influence ...
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Jara Ulloa, Paola Andrea; Núñez Vergara, Luis; Squella Serrano, Juan (Wiley-V CH Verlag GMBH, 2007-07)Tne reductive electrochemistry of 1-methyl-4-nitro-2-hydroxymethylimidazole, a 4-nitroimidazole derivative, was examined in the presence of surfactants anionic as sodium dodecyl sulfate (SDS), nonionic, Triton-X, Cationic, ...
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Jara Ulloa, Paola Andrea; Salgado Figueroa, Paola; Moscoso Cabello, Raúl Andrés; Squella Serrano, Juan (2013)A molecularly imprinted polypyrrole polymer-based film and its properties regarding the recognition of gallic acid were investigated. The polypyrrole film was prepared by including a template molecule during the ...
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Bollo Dragnic, Soledad; Jara Ulloa, Paola Andrea; Finger Caraccioli, Sebastián; Núñez Vergara, Luis; Squella Serrano, Juan (ELSEVIER SCIENCE SA, 2005-04-01)A scanning electrochemical microscope (SECM), in the tip generation substrate collection and feedback modes, was used in a method to characterize the electrode mechanism of the O-2/O-2*(-) couple in dimethylsulphoxide ...
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Salgado Figueroa, Paola; Jara Ulloa, Paola Andrea; Álvarez Lueje, Alejandro; Squella Serrano, Juan (2013)In this work, a new method to quantify nitrofurantoin in aqueous media using a flow injection system connected to commercially available screen-printed carbon nanofibers was developed. A pretreatment of the screen-printed ...
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Turchán Labbé, Mariella Jéssica; Jara Ulloa, Paola Andrea; Bollo Dragnic, Soledad; Núñez Vergara, Luis; Squella Serrano, Juan; Álvarez Lueje, Alejandro (ELSEVIER SCIENCE BV, 2007-10-31)A complete electrochemical study and a novel electroanalytical procedure for brombexine quantitation are described. Bromhexine in methanol/0.1 mol L-1 Britton-Robinson buffer solution (2.5/97.5) shows an anodic response ...
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Jara Ulloa, Paola Andrea; Salgado Figueroa, Paola; Yañez,; Núñez Vergara, Luis; Squella Serrano, Juan (2012)We report the adsorptive voltammetric determination of nifedipine on multiwalled carbon nanotubes (MWCNT)-modified glassy carbon electrode (GCE). Nifedipine was adsorbed on the MWCNT and then reduced using linear sweep and ...
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Bollo Dragnic, Soledad; Jara Ulloa, Paola Andrea; Zapata Torres, Gerald; Cutiño,; Sturm,; Núñez Vergara, Luis; Squella Serrano, Juan (Elsevier Ltd, 2010)The voltammetric reduction of 1-methyl- and 1-H- 4-nitroimidazole derivatives was studied in different protic and aprotic media to investigate the influence of the N-1 substitution in the mechanism of reduction, the ...
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Jara Ulloa, Paola Andrea; Bollo Dragnic, Soledad; Núñez Vergara, Luis; Squella Serrano, Juan (WILEY-V C H VERLAG GMBH, 2008-06)We report the electrochemical behavior of a 4-nitroimidazole derivative, 1-methyl-4-nitro-2-hydroxymethylimidazole (4-NImMeOH), on glassy carbon electrode (GCE) modified with multiwalled carbon nanotubes (MWCNT). As ...