Now showing items 1-4 of 4

    • Antioxidant activity of gallates: an electrochemical study in aqueous media 

      Gunckel Ulisse, María Soledad; Santander Gutiérrez, Ingrid Paola; Cordano, G.; Ferreira Parker, Jorge; Muñoz, S.; Núñez Vergara, Luis; Squella Serrano, Juan (ELSEVIER SCI IRELAND, 1998-07-03)
      The electron-donating ability of gallates, which are food and pharmaceutical antioxidants, is quantitatively assessed on the basis of their electrochemical characteristics. Gallic acid and the propyl, i-propyl, butyl, ...
    • Electrochemical and ESR characterization of free radicals from C-4 nitroso phenyl 1,4-dihydropyridines in aprotic media 

      Núñez Vergara, Luis; Santander Gutiérrez, Ingrid Paola; Navarrete Encina, Patricio; Valenzuela Pedevila, Jorge; Sturm Schaub, Juan; Squella Serrano, Juan (ELECTROCHEMICAL SOC, 2006)
      The present paper deals with the electrochemical and electron spin resonance (ESR) characterization of a number of nitroso phenyl 1,4-dihydropyridines in aprotic media on a hanging drop mercury electrode (HDME). The ...
    • Synthesis of new 4-nitrosophenyl-1,4-dihydropyridines of pharmacological interest 

      Santander Gutiérrez, Ingrid Paola; Núñez Vergara, Luis; Squella Serrano, Juan; Navarrete Encina, Patricio (GEORG THIEME VERLAG KG, 2003-12-18)
      The synthesis and characterization of a series of 4-nitrosophenyl-1.4-dihydropyridines derived from the respective nitro compounds of pharmacological interest is described. The complete synthetic pathway is based on the ...
    • Voltammetric determination of melatonin and pyridoxine (vitamin B6) in tablets 

      Santander Gutiérrez, Ingrid Paola; Núñez Vergara, Luis; Sturm Schaub, Juan; Squella Serrano, Juan (SOCIEDAD CHILENA DE QUIMICA, 2001-06)
      Melatonin and Vitamin B6 can be oxidized at the glassy carbon electrode showing well-resolved anodic peaks by differential pulse voltammetry. Vitamin B6 shows an oxidation peak potential of about 650 mV vs Ag/AgCl in ammonia ...