Browsing by Title Artículos de revistas

Now showing items 757-776 of 2801

    • Differential inhibitory effect of alpha-, beta-, gamma-, and delta-tocopherols on the metal-induced oxidation ... 
      Valenzuela, A.; Sanhueza, J.; Nieto, S. (Institute of Food Technologists, 2002)
      Cholesterol oxidation, products (COPs) are present in biological tissues and in foods. The inhibitory effect of antioxidants, such as tocopherols, on COPs formation has been only partially investigated. The antioxidant ...
    • Differential Participation of Angiotensin II Type 1 and 2 Receptors in the Regulation of Cardiac Cell Death ... 
      Aránguiz Urroz, Pablo Daniel; Soto Muñoz, Dagoberto; Contreras Ferrat, Ariel Eduardo; Troncoso Cotal, Rodrigo; Chiong Lay, Mario; Montenegro Obregón, José Joaquín; Venegas Pino, Daniel Esteban; Smolic Smolic, Christian; Ayala Jeria, Pedro Segundo; Thomas, W. G.; Lavandero González, Sergio; Díaz Araya, Guillermo (NATURE PUBLISHING GROUP, 2009-05)
      The Angiotensin II (Ang II) type 1 (AT(1)R) and type 2 (AT(2)R) receptors are increased in the heart following myocardial infarction and dilated cardiomyopathy, yet their contribution at a cellular level to compensation ...
    • Differential prooxidative effect of adult and fetal hemoglobin 
      Valenzuela Bonomo, Carlos; Guerra, Ricardo; Lazcano, Laura; Canãs, Patricio (1986)
      Human fetal hemoglobin assayed in a peroxidizing system shows an increased prooxidative effect when compared to human adult hemoglobin. This effect is related only to the oxyhemoglobin form since both fetal and adult ...
    • Differential pulse polarographic and UV-vis spectrophotometric study of inclusion complexes formed by ... 
      Yáñez, C.; Núñez Vergara, Luis; Squella Serrano, Juan (2003)
      The formation of inclusion complexes of well-known 1,4-dihydropyridine calcium antagonists, such as nifedipine (NF) and nicardipine (NC), with beta-cyclodextrin (betaCD) was investigated by differential pulse polarography ...
    • Differential pulse voltammetric assay of lercanidipine in tablets 
      Álvarez Lueje, Alejandro; Pujol, Silvina; Núñez Vergara, Luis; Squella Serrano, Juan (AOAC INTERNATIONAL, 2002-11)
      Lercanidipine in ethanol-0.04M Britton-Robinson buffer (20 + 80) gives an irreversible anodic response on a glassy carbon electrode in a broad pH range (2-12) that depends on pH. This signal can be attributed to oxidation ...
    • Differential roles for pathogenicity islands SPI-13 and SPI-8 in the interaction of Salmonella Enteritidis ... 
      Espinoza, Rodrigo A.; Silva Valenzuela, Cecilia A.; Amaya, Fernando A.; Urrutia, ítalo M.; Contreras, Inés; Santiviago, Carlos A. (BioMed Central, 2017)
      Background: Salmonella pathogenicity island (SPI)-13 is conserved in many serovars of S. enterica, including S. Enteritidis, S. Typhimurium and S. Gallinarum. However, it is absent in typhoid serovars such as S. Typhi and ...
    • Dihydroeuparin as sunscreen 
      Ortega, Pedro A.; Guzmán, Miguel E.; Vera, Leonel R.; Velázquez, Jorge A.; Abuín, Eisa B. (Sociedad Chilena de Quimica, 2000)
      Physicochemical parameters, ε, λ, solubility in water and Brij-35, pKa, Ka and photostability for dihydroeuparin, 5-acetyl-2, 3-dihydro-6-hydroxi-2-isopropenyl-benzo (b) furan (from Senecio Graveolens), were obtained and ...
    • Dihydropyridine-fused and pyridine-fused coumarins: Reduction on a glassy carbon electrode in dimethylformamide 
      Núñez Vergara, Luis; Pardo Jiménez, V; Barrientos, C.; Olea Azar, Claudio; Navarrete-Encina, P. A.; Squella Serrano, Juan (2012)
      In this study, two series of dihydropyridine-fused and pyridine-fused coumarins were synthesised and electrochemically characterised in aprotic medium. In both series, the most easily reducible groups were the endocyclic ...
    • Dinámica del carbono en suelos con distintos sistemas de labranza 
      Aguilera S., S. María; Borie B., Gilda; Peirano V., Pedro (Universidad de la Frontera. Facultad de Ciencias Agropecuarias, 1999)
      La dinámica del carbono se evaluó en suelos con problemas de acidificación y de alto contenido de Al activo. En estos estudios, además se incluyen los resultados obtenidos en sistemas de cero-labranza, para definir en ...
    • Discovery two potent and new inhibitors of 15-lipoxygenase: (E)-3-((3,4-dihydroxybenzylidene) amino)-7-hy ... 
      Nuñez, Carolina; Morales, Nicole; García Beltrán, Olimpo; Mascayano, Carolina; Fierro, Angelica (Birkhauser Boston, 2017)
      The mechanisms of action and structural determinants of lipoxygenases inhibitors have been explored on several occasions, but many questions remain unanswered, especially about the differences of the inhibition mechanisms ...
    • A discrete dinuclear Cu(II)-Gd(III) complex derived from a Schiff base ligand, [CuGd(ems)(NO3)(3)H2O]Cu(ems) ... 
      Atria Salas, Ana María; Moreno N., Yanko; Spodine Spiridonova, Evgenia; Garland, María Teresa; Baggio, Ricardo (ELSEVIER SCIENCE SA, 2002-06-27)
      A Cu(II)-Gd(III) heteronuclear complex with N,N'-ethylene-bis-5-methoxy salicylaldiimine (ems) as ligand has been synthesized. The complex crystallizes in the monoclinic system C2/c space group. The structure consists of ...
    • Dispersion of bamboo type multi-wall carbon nanotubes in calf-thymus double stranded DNA 
      Primo, Emiliano N.; Cañete Rosales, Paulina; Bollo Dragnic, Soledad; Rubianes, María D.; Rivas, Gustavo A. (2013)
      We report for the first time the use of double stranded calf-thymus DNA (dsDNA) to successfully disperse bamboo-like multi-walled carbon nanotubes (bCNT). The dispersion and the modified electrodes were studied by different ...
    • Disposition kinetics of dibekacin in normal subjects and in patients with renal failure 
      Arancibia, Aquiles; Chávez Arrué, Jorge; Ibarra, R.; Ruiz, I.; Icarte, A.; Thambo Becker, Sergio; Chávez, H. (Dustri-Verlag Dr. Karl Feistle, 1987)
      Dibekacin pharmacokinetics was studied in ten healthy volunteers and six patients with renal failure presenting Clcr<10ml.min-1 per 1.73m2 of body surface, given as a low intravenous bolus to the volunteers and as 30-minute ...
    • Disposition kinetics of dibekacin in patients with renal-failure and in patients undergoing hemodialysis 
      Arancibia, Aquiles; Baillarie, D.; Bravo, M.; Chávez Arrué, Jorge (Dustri-Verlag Dr Karl Feistle, 1995-11)
      Dibekacin pharmcokinetics was studied in 3 healthy volunteers, 5 patients with renal failure presenting Cl-cr, between 4.0 and 67 ml min (-1) per 1.73 m(2) of body surface and 5 anephric patients given as a 30 minute ...
    • Dissection of the 16S rRNA binding site for ribosomal protein S4 
      Sapag, Amalia; Vartikar, J. V.; Draper, D. E. (Elsevier Science Publishers B. V., 1990)
      The ribosomal protein S4 from Escherichia coli is essential for initiation of assembly of 30S ribosomal subunits. We have undertaken the identification of specific features required in the 16S rRNA for S4 recognition by ...
    • Dissolution kinetics evaluation of controlled-release tablets containing propranolol hydrochloride 
      Velasco-De-Paola, M. V.R.; Santoro, M. I.R.M.; Gai, M. N. (Marcel Dekker Inc., 1999)
      In the present research, controlled-release propranolol hydrochloride tablets were prepared for twice-daily administration, allowing more uniform plasmatic levels of the drug. Pharmaceutical formulations were prepared with ...
    • Distinct protein kinases regulate SNAP-25 expression in chromaffin cells 
      Montiel, C.; Mendoza, I.; García, C. J.; Awad, Y.; García Olivares, J.; Solís Garrido, L. M.; Lara Peñaloza, Hernán; García, A. G.; Cárdenas, A. M. (WILEY-LISS, DIV JOHN WILEY & SONS INC, 2003-02-01)
      The contribution of distinct Ca2+-sensitive protein kinases to the regulation of the expression of the synaptosomal-associated protein SNAP-25 was examined in bovine chromaffin cells. Prolonged incubation with high K+ (38 ...
    • Distortion isomerism in ferrous thiourea complexes-II(1) thermodynamics and kinetics 
      Latorre, R.; Costamagna, J.; Frank, E.; Abeledo, C.; Frankel, R. (1979)
      Mössbauer spectroscopy as a function of temperature of Fe(II)(N,N′-dicyclohexyl-thiourea)6(ClO4)2(FeDCTU) shows the existence of two isomeric forms A and B which coexist in the temperature range 200 < T < 300 K. The relative ...
    • Distribución del carbono en residuos orgánicos y su interacción con elementos metálicos, nutrientes y/o ... 
      Borie B., Gilda; Peirano V., Pedro; Espinoza González, Jeannette; Zunino Venegas, Hugo; Aguilera S., S. María (Sociedad Chilena de la Ciencia del Suelo, 2000)
      Universalmente se hace necesario y urgente implementar políticas de uso de residuos orgánicos en los suelos, tanto por la necesidad de disponer de estos residuos, como también por la necesidad apremiante de recuperar el ...
    • Distribution of urocanic acid isomers between aqueous solutions and n-octanol, liposomes or bovine serum albumin 
      Campos, Ana M.; Cárcamo, Carlos; Silva, Eduardo; García, Sandra; Lemp Miranda, Else; Alarcón, Emilio; Edwards, Ana María; Günther Sapunar, Germán; Lissi Gervaso, Eduardo A. (ELSEVIER, 2008-01-30)
      The distribution of urocanic acid (UCA) isomers between aqueous solutions and n-octanol, egg yolk phosphatidylcholine (eggPC) liposomes or bovine serum albumin (BSA) has been evaluated. Regarding its partitioning between ...