Browsing by Issue Date Artículos de revistas

Now showing items 1201-1220 of 2801

    • Construction and characterization of a lead(II) ion selective electrode with 1-furoil-3,3-diethylthiourea ... 
      Lazo, A. R.; Bustamante, M.; Arada, M. A.; Jiménez, J.; Yazdani-Pedram Zobeiri, Mehrdad (ASOC QUIMICOS, INST QUIMICO SARRIA, 2005-11)
      Lead(II) ion selective electrode, ISE, based on plasticized PVC membranes with 1-furoyl 3,3 diethyl thiourea as ionophore and tributylphosphate as plasticizer have been developed. The membrane was applied on a conducting ...
    • Stability study of simvastatin under hydrolytic conditions assessed by liquid chromatography 
      Álvarez Lueje, Alejandro; Valenzuela, C.; Squella Serrano, Juan; Núñez Vergara, Luis (AOAC INTERNATIONAL, 2005-11)
      In this work, a liquid chromatography stability-indicating method was developed and applied to study the hydrolytic behavior of simvastatin in different pH values and temperatures. The selected chromatographic conditions ...
    • Two new dammarane triterpenoids from Kageneckia angustifolia D. Don 
      López Pérez, J. L.; Erazo, Silvia; Delporte Vergara, Carla; Negrete Córdova, Rosa; Muñoz Muñoz, Orlando; García, R.; Backhouse Erazo, Nadine; San Feliciano, Arturo (JOHN WILEY & SONS LTD, 2005-11)
      Two new dammarane triterpenoids, 20R,21-epoxydammar-24-ene-3,23-dione and 20R,21-epoxy-3 beta-hydroxydammar-24-ene-23-one have been isolated from the aerial parts of Kageneckia angustifolia D. Don, Rosaceae, along with the ...
    • Mechanisms of cell death: molecular insights and therapeutic perspectives 
      Díaz Cuevas, Laín; Chiong Lay, Mario; Quest, Andrew F. G.; Lavandero González, Sergio; Stutzin Schottlander, Andrés (NATURE PUBLISHING GROUP, 2005-11)
      Editorial Material
    • IGF-1 protects cardiac myocytes from hyperosmotic stress-induced apoptosis via CREB 
      Maldonado, Carola; Cea, Paola; Adasme, Tatiana; Collao, Andrés; Díaz Araya, Guillermo; Chiong Lay, Mario; Lavandero González, Sergio (ACADEMIC PRESS INC ELSEVIER SCIENCE, 2005-11-04)
      Hyperosmotic stress stimulates a rapid and pronounced apoptosis in cardiac myocytes which is attenuated by insulin-like growth factor-1 (IGF-1). Because in these cells IGF-1 induces intracellular Ca2+ increase, we assessed ...
    • Gadolinium and neodymium citrates: Evidence for weak ferromagnetic exchange between gadolinium(III) cations 
      Baggio, Ricardo; Calvo, Rafael; Garland, María Teresa; Peña, Octavio; Perec, Mireille; Rizzi, Alberto (AMER CHEMICAL SOC, 2005-11-28)
      A new lanthanide citrate motif of general formula [Ln(Hcit)(H2O)(2)center dot H2O](n), where Ln = Gd (1) and Nd (2) and HCit(3-)= C(OH)(COO-)(CH2COO-)(2), has been synthesized hydrothermally from Ln(2)O(3) and citric acid ...
    • Zn(II) and Cu(II) Uptake from Acid Solutions with Microcapsules Containing a Non-Specific Alkyl Phosphonic ... 
      Valenzuela, Fernando; Yazdani-Pedram Zobeiri, Mehrdad; Araneda, Claudio; Basualto Flores, Carlos; Kamio, Eiji; Kondo, Kazuo (SOCIEDAD CHILENA DE QUIMICA, 2005-12)
      It is studied the uptake of Zn(II) and Cu(II) from acid aqueous solutions using microcapsules containing 2-ethylhexylphosphonic acid mono-2-ethylhexyl ester, a non-specific extractant, as an alternative method for metals ...
    • Reppe Reaction Catalyzed by Soluble Carbonylrhodium Complexes 
      Uzcátegui, G. C.; Hung, F.; Ortega, Marisol C.; Pardey, Alvaro J.; Longo, C.; Aguirre, P.; Moya, S. A. (SOCIEDAD CHILENA DE QUIMICA, 2005-12)
      The catalysis of the hydroesterification and hydroformylation-acetalization of 1-hexene by rhodium(I), cis-[Rh(CO)2(amine)2](PF6) complexes (amine = pyridine, 2-picoline, 3-picoline, 4-picoline, 3,5-lutidine or 2,6-lutidine) ...
    • Assessment of the hydrolytic degradation of lovastatin by HPLC 
      Álvarez Lueje, Alejandro; Pastine Sepúlveda, Javiera; Squella Serrano, Juan; Núñez Vergara, Luis (SOCIEDAD CHILENA DE QUIMICA, 2005-12)
      In this work an HPLC stability-indicating method was developed and applied to study the hydrolytic behaviour of lovastatin in different simulated fluids. The selected chromatographic conditions were a C-18 column, ...
    • Increased aortic NADPH oxidase activity in rats with genetically high angiotensin-converting enzyme levels 
      Jalil Milad, Jorge; Pérez, Alfonso; Ocaranza, María Paz; Bargetto, Jorge; Galaz, Alfonso; Lavandero González, Sergio (LIPPINCOTT WILLIAMS & WILKINS, 2005-12)
      In humans and rats, angiotensin I-converting enzyme activity is significantly determined by a gene polymorphism. Homozygous Brown Norway rats have higher plasma angiotensin I-converting enzyme activity and circulating ...
    • Loss of synaptonemal complex protein-1, a synaptonemal complex protein, contributes to the initiation of ... 
      Paredes Vargas, Alfonso; García Rudaz, C.; Kerr, B.; Tapia, V.; Dissen, G. A.; Costa, M. E.; Cornea, A.; Ojeda, Sergio R. (ENDOCRINE SOC, 2005-12)
      In the rat ovary, germ and somatic cells become organized into primordial follicles 48-72 h after birth. Although several genes have been implicated in the control of early follicular growth, less is known about the factors ...
    • Role of stress and sympathetic innervation in the development of polycystic ovary syndrome 
      Greiner Gebauer, Monika Marcela; Paredes Vargas, Alfonso; Araya, Verónica; Lara Peñaloza, Hernán (HUMANA PRESS INC, 2005-12)
      This article presents a review of the role of the sympathetic activity in ovarian pathologies affecting reproductive function. We provide a succinct outline of the findings of our group in this area. The participation of ...
    • Fast high performance liquid chromatography and ultraviolet-visible quantification of principal phenolic ... 
      Troncoso, N.; Sierra, H.; Carvajal, L.; Delpiano, P.; Günther Sapunar, Germán (ELSEVIER SCIENCE BV, 2005-12-23)
      An improved HPLC method is reported for the determination of rosemary's principal phenolic antioxidants, rosmarinic and carnosic acids, providing a fast and simultaneous determination for both of them by using a solid phase ...
    • In vitro sensitivity of Botrytis cinerea to anthraquinone and anthrahydroquinone derivatives 
      Mendoza, Leonora; Araya Maturana, Ramiro; Cardona, Wilson; Delgado Castro, Tomás; García, C.; Lagos, C.; Cotoras, M. (AMER CHEMICAL SOC, 2005-12-28)
      The effect on mycelial growth of the fungus Botrytis cinerea of a set of structurally related tricyclic hydroquinones [9,10-dihydroxy-4,4-dimethyl-2,3,5,8-tetrahydroantracen-1(4H)-one and 9,10-dihydroxy-4,4-dimethyl-5,8- ...
    • Speciation of the Fe(II)-Fe(III)-H2SO4-H2O system at 25 and 50 degrees C 
      Casas de Prada, Jesús; Crisóstomo, G.; Cifuentes, L. (ELSEVIER SCIENCE BV, 2005-12-30)
      This work presents theoretical and experimental results on the speciation of the Fe(Il)-Fe(III)-H2SO4-H2O system in concentrated solutions (up to 2.2 m H2SO4 and 1.3 m Fe). The aim was to study the chemical equilibria of ...
    • Electrochemical and ESR characterization of free radicals from C-4 nitroso phenyl 1,4-dihydropyridines in ... 
      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 ...
    • La evolución y el ascenso bioquímico-molecular del hombre: del Big Bang a la conciencia valórica. 
      Sapag Hagar, Mario (Real Academia Nacional de Farmacia del Instituto de España, 2006)
      Al momento de examinar la asociación de hitos que han marcado la historia de la Ciencia, se deduce que los sistemas basados en grandes ideas unificadoras suelen asociarse, consciente o inconscientemente, con pensamientos ...
    • Active metabolites and biological activities from Malesherbia auristipulata 
      Erazo, Silvia; Negrete Córdova, Rosa; Zaldívar San Román, María Mercedes; Backhouse Erazo, Nadine; Belmonte, E.; Rojas, Oriana; San Martín, Aníbal; Masson Salaué, Lilia; García, R.; Delporte Vergara, Carla (University of Salerno, 2006)
      The antimicrobial activity of the resinous exudate from the aerial part of Malesherbia auristipulata showed an active mixture against Gram (+) bacteria: S.aureus, B. subtilis and M. flavus and less active against Gram (-) ...
    • Estudio de las modificaciones en proteinas de reineta (Brama australis), sometidas a congelación y ... 
      Abugoch James, Lilian; Quitral Robles, Vilma; Larraín Barth, María Angélica; Vinagre, Julia; Kriukov, Andrei; Chávez, Gloria (Sociedad Latinoamericana de Nutrición, 2006)
      El presente trabajo tuvo como objetivo estudiar las propiedades funcionales y térmicas en carne de reineta (Brama australis) congelada, mediante los análisis de capacidad de retención de agua (CRA), capacidad formadora de ...
    • IGF-1: Un factor de crecimiento con acciones cardiovasculares pleiotrópicas. 
      Contreras Ferrat, Ariel Eduardo; Aránguiz Urroz, Pablo Daniel; Díaz Elizondo, Jessica; Chiong Lay, Mario; Muñoz, Juan Pablo; Parra Ortíz, María Valentina; Ibarra, Cristián; Rojas Rivera, Diego; Troncoso Cotal, Rodrigo; Eisner, Verónica; Salas, Daniela; Rodríguez Villarroel, Andrea Elizabeth; Carrasco Alarcón, Loreto del Pilar; Díaz Araya, Guillermo; Lavandero González, Sergio (Sociedad Chilena de Cardiología y Cirugía Cardiovascular, 2006)
      El factor de crecimiento análogo a insulina tipo 1 (IGF-1) es un péptido relacionado estructural y funcionalmente con insulina que posee efectos mitogénicos y citoprotectores. Sus efectos biológicos dependen de la activación ...