Browsing by Author "Matsuhiro, Betty"
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- ItemAnthocyanin composition in aged Chilean Cabernet Sauvignon red wines(2011) Aguirre Brockway, Mariana Javiera; Isaacs Casanova, Mauricio; Matsuhiro, Betty; Mendoza, Leonora; Santos, Leonardo S.; Torres, Simonet
- ItemAntifungal Activity of Resveratrol against Botrytis cinerea Is Improved Using 2-Furyl Derivatives(2011) Caruso, Francesco; Mendoza, Leonora; Castro Molina, Paulo Antonio; Cotoras Tadic, Milena; Aguirre, M.; Matsuhiro, Betty; Isaacs Casanova, Mauricio; Rossi, Miriam; Viglianti, Angela; Antonioletti, Roberto
- ItemCHARACTERIZATION OF PHENOLIC ACIDS PROFILE FROM CHILEAN RED WINES BY HIGH-PERFORMANCE LIQUID CHROMATOGRAPHY(2011) Mendoza, Leonora; Matsuhiro, Betty; Aguirre Brockway, Mariana Javiera; Isaacs Casanova, Mauricio; Sotes, Gaston; Cotoras Tadic, Milena; Melo, Ricardo
- ItemDETERMINATION OF LOW MOLECULAR WEIGHT CARBOHYDRATES IN CABERNET SAUVIGNON RED WINES(2009) Matsuhiro, Betty; Torres, Rodrigo; Zuniga, Elisa A.; Aguirre, Maria J.; Mendoza, Leonora; Isaacs Casanova, Mauricio
- ItemDetermination of S(IV) Oxoanions at Poly[Ru(5-NO2-Phen)(2)Cl] Tetrapyridylporphyrin Glassy Carbon Modified Electrode(2012) Dreyse, Paulina A.; Quezada Sandoval, Diego Alonso; Honores Sotelo, Jessica Scarlet; Aguirre, Maria Jesus; Mendoza, Leonora; Matsuhiro, Betty; Villagra, Diego; Isaacs Casanova, Mauricio
- ItemElectrochemical behaviour and antioxidant capacity of anthocyanins from Chilean red wine, grape and raspberry(2010) Aguirre, Maria J.; Chen Carrillo, Yo-Ying Adriana; Isaacs Casanova, Mauricio; Matsuhiro, Betty; Mendoza, Leonora; Torres, Simonet
- ItemElectrochemical Properties of a Conducting Film Derived from Iron(II) Tris(diaminopolypyridyl) Complex in the S(IV) Oxoanions Reduction(2011) Garcia, Camilo; Dominguez, Cristian; Aliaga, Alvaro; Matsuhiro, Betty; Mendoza, Leonora; Aguirre, Maria J.; Isaacs Casanova, Mauricio
- ItemElectrochemical Reduction of S(IV) Compounds in Water-Ethanol Solutions at Nafion/Tetraruthenated Porphyrins Glassy Carbon Modified Electrodes(2010) Calfuman, Karla; García, Macarena; Aguirre, Maria. J.; Matsuhiro, Betty; Mendoza, Leonora; Isaacs Casanova, Mauricio
- ItemElectrochemical reduction of SO2 on poly-Co-3-tetraaminophenylporphyrin glassy carbon modified electrode(2009) Fuenzalida, Francesca; Dreyse, Paulina A.; Villagra, Diego; Matsuhiro, Betty; Mendoza, Leonora; Aguirre, Maria J.; Isaacs Casanova, Mauricio
- ItemELECTROOXIDATION AND DETERMINATION OF SULFITE IN ETHANOL-WATER SOLUTIONS USING POLY-Cu(II)-TETRAKIS(x-AMINOPHENYL)PORPHYRIN/GLASSY CARBON MODIFIED ELECTRODES(2009) Bravo, Paz; Chen Carrillo, Yo-Ying Adriana; Ramírez Jofré, Galo; Canales, Maria J.; Matsuhiro, Betty; Mendoza, Leonora; Isaacs Casanova, Mauricio; García, Macarena; Arevalo, Maria C.; Aguirre, Maria J.
- ItemOn the Ligand-to-Metal Charge-Transfer Photochemistry of the Copper(II) Complexes of Quercetin and Rutin(2011) Torres, Simonet; Ferraudi, Guillermo; Aguirre, María Jesús; Isaacs Casanova, Mauricio; Matsuhiro, Betty; Chandia, Nancy P.; Mendoza, Leonora
- ItemSynthesis, structure and electrochemical properties of the cationic complex tris-(imidazolidine-1,10-phenanthroline)iron(II)(2009) García, Camilo; Villagra, Diego; Caruso, Francesco; Rossi, Miriam; Matsuhiro, Betty; Mendoza, Leonora; Aguirre, María J; Isaacs Casanova, Mauricio
- ItemVibrational spectroscopy characterization and anticoagulant activity of a sulfated polysaccharide from sea cucumber Athyonidium chilensis(ELSEVIER SCI LTD, 2012) Matsuhiro, Betty; Osorio Roman, Igor O.; Torres, RodrigoExtraction of Athyonidium chilensis body wall afforded a light brown powder in 4.2% yield which was fractionated by ion-exchange chromatography. The main fraction F1 contained glucuronic acid, galactosamine and fucose in a molar ratio of 1.0:1.1:1.1, and 32.9% of sulfate group. The second derivative FT-IR spectroscopy and Surface-enhanced Raman scattering (SERS) give more information than the normal IR and Raman spectroscopies. The broad band in the normal FT-IR spectrum of F1 at 850.6 cm(-1) assigned to sulfate group was resolved in the second derivative spectrum into three bands at 856.4 cm(-1), 837.4 cm(-1) and 818.6 cm(-1) assigned to sulfate group attached to axial C4 and equatorial C2 and C6, respectively, in glycosidic residues. The most important bands in SERS of F1, but not observed in Raman spectrum are bands at 1648 cm(-1) (nu C=O), 1377 cm(-1) (delta C-H) assigned to methyl group of N-acetyl group, at 1173 cm(-1) and at 956.2 cm(-1) (nu C-O-C) of glycosidic linkage: and bands at 925.5 cm(-1) and 890.4 cm(-1) (delta C-1-H) assigned to a and beta anomeric configurations of glycosidic residues, respectively. By NMR studies, glycosidic linkages and sulfation pattern of F1 was confirmed. Results obtained indicated that fraction F1 is chondroitin 4,6-disulfate substituted at position O-3 of glucuronic acid by partially 2,4-disulfated alpha-fucopyranosyl residues. Moreover, the anticogulant activity, measure in APTT of F1 showed at low concentration, a good correlation with heparin. (C) 2012 Elsevier Ltd. All rights reserved.