Browsing by Author "Matsuhiro, Betty"
Now showing items 1-5 of 5
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Characterization of sodium alginate and its block fractions by surface-enhanced Raman spectroscopy Campos Vallette, Marcelo; Chandía, Nancy P.; Clavijo Campos, Ernesto; Leal, David; Matsuhiro, Betty; Osorio Román, Igor; Torres, Simonet (JOHN WILEY & SONS LTD, 2009-10-23)The surface-enhanced Raman scattering (SERS) of sodium alginates and their hetero- and homopolymeric fractions obtained from four seaweeds of the Chilean coast was studied. Alginic acid is a copolymer of β-D-mannuronic ...
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Aguirre, María Jesús; Chen, Yo Y.; Isaacs Casanova, Mauricio; Matsuhiro, Betty; Mendoza, Leonora; Torres, Simonet (ELSEVIER, 2010)The anthocyanin fractions were extracted from Cabernet Sauvignon red wine, skins of Vitis vinifera grapes and raspberry fruits (Rubus idaeus). In red wine extract, 16 anthocyanins were identified, malvidin-3-Oglucoside being ...
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Calfumán, Karla; García, Macarena; Aguirre, María Jesús; Matsuhiro, Betty; Mendoza, Leonora; Isaacs Casanova, Mauricio (Wiley InterScience, 2010)This work describes electrocatalytic detection of S(IV) compounds in water-ethanol solutions under acidic conditions, on a glassy carbon electrode modified with Co(II) tetraruthenated porphyrin electrostatically assembled ...
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Calfumán, Karla; Aguirre, María Jesús; Villagra, Diego; Yáñez Soto, Claudia; Arévalo, Carmen; Matsuhiro, Betty; Mendoza, Leonora; Isaacs Casanova, Mauricio (Springer, 2010)In this work, the modification of a glassy carbon electrode with tetraruthenated porphyrins electrostatically assembled onto a Nafion film, previously adsorbed on the electrode surface, is reported. This modified electrode ...
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Torres, Simonet; Ferraudi, Guillermo; Aguirre, María Jesús; Isaacs Casanova, Mauricio; Matsuhiro, Betty; Chandía, Nancy P.; Mendoza, Leonora (2011)In contrast to the UV-photoinduced ligand photoionization of the flavonoid complexes of FeIII, redox reactions initiated in ligand-to-metal charge-transfer excited states were observed on irradiation of the quercetin (1) ...