Browsing by Title Artículos de revistas

Now showing items 2329-2348 of 2801

    • Stereoselective synthesis of dodecaammine-ì-hexoltetracobalt(III) in carbohydrates solution Sintesis ... 
      Larrazábal Rojas, Guillermo; Bunel Torrealba, Sergio; Ibarra, Carmen; Parada Aliste, José (2002)
      Reaction between cis-[Co(NH3)(H2O)(2)](3-) and ammonia in aqueous solution, in the presence of a carbohydrate, leads to the formation of the tetranuclear complex of cobalt (III): [Co-4(NH3)(12)(OH)(6)](6+) partially resolved. ...
    • The stereoselective synthesis of the Werner complex with substoichiometric sugars 
      Parada Aliste, José; Larrazábal Rojas, Guillermo; Aguirre Álvarez, Pedro; Zolezzi Carvallo, Santiago; Vega, Carmen; Garrido, Cristián (Sociedad Chilena de Química, 2008)
      A tetranuclear complex of Co(III) with hydroxo bridges, so-called “Werner Complex”, was synthesized in the presence of several sugars (1-8) with partial resolution of this complex. The sugars in 10 mol % with respect to ...
    • The stereoselective synthesis of the Werner complex with substoichiometric sugars 
      Parada Aliste, José; Larrazábal Rojas, Guillermo; Aguirre Álvarez, Pedro; Zolezzi Carvallo, Santiago; Loewenstein Vega, Carmen; Garrido, Cristián (SOC CHILENA QUIMICA, 2008-03)
      A tetranuclear complex of Co(III) with hydroxo bridges, so-called "Werner Complex", was synthesized in the presence of several sugars (1-8) with partial resolution of this complex. The sugars in 10 mol % with respect to ...
    • Stereoselective synthesis of tris[di-M-hydroxy-bis-(ethylenediamine)] tetracobalt(III) 
      Parada Aliste, José; Larrazábal Rojas, Guillermo; Aguirre Álvarez, Pedro (SOCIEDAD CHILENA DE QUIMICA, 2005-06)
      Tetranuclear complexes of Co(III) with bidentate ligands and hydroxo bridges were synthesized in the presence of D-glucosamine, D-mannosamine. D- and L-xylose with the partial resolution the these complexes.
    • Stim-activated TRPC-ORAI channels in pulmonary hypertension induced by chronic intermittent hypoxia 
      Castillo Galán, Sebastián; Arenas, Germán A.; Reyes, Roberto V.; Krause, Bernardo J.; Iturriaga, Rodrigo (SAGE, 2020)
      Obstructive sleep apnea (OSA), a breathing disorder featured by chronic intermittent hypoxia (CIH) is associated with pulmonary hypertension (PH). Rodents exposed to CIH develop pulmonary vascular remodeling and PH, but ...
    • Stoichiometry and conditional stability constants of Cu(II) or Zn(II) clioquinol complexes; implications ... 
      Ferrada, Evandro; Arancibia, Verónica; Loeb, Bárbara; Norambuena, Ester; Olea Azar, Claudio; Huidobro Toro, Juan Pablo (ELSEVIER SCIENCE BV, 2007-05)
      Successful trials with 5-chloro-7-iodo-8-hydroxyquinoline (clioquinol, CQ) for Alzheimer’s disease treatment prompted renewed interest in assessing whether its therapeutic action is related to the coordination of ...
    • Stopping power of palladium for protons in the energy range 0.300-3.100 MeV 
      Miranda, P.; Sepúlveda, A.; Morales, J.; Rodriguez, T.; Burgos, E.; Fernández, H. (2014)
      The stopping power of palladium for protons has been measured using the transmission method with an overall uncertainty of around 5% over the energy range Ep=(0.300-3.100) MeV. These stopping power data are then compared ...
    • Strategies of elicitation to enhance bioactive compound content in edible plant sprouts: a bibliometric study 
      Toro, María Trinidad; Ortiz Viedma, Jaime Alejandro; Becerra, José; Zapata, Nelson; Fierro, Paulo; Illanes, Marcelo; López, María Dolores (MDPI, 2021)
      Vegetable sprouts are a food source that presents high content of bioactive compounds which can also be enhanced through elicitation mechanisms. To better understand the scientific production and research trends on this ...
    • Stress and the Reproductive Axis 
      Toufexis, D.; Rivarola, M. A.; Lara Peñaloza, Hernán; Viau, V. (British Society for Neuroendocrinology, 2014)
      There exists a reciprocal relationship between the hypothalamic-pituitary-adrenal (HPA) and the hypothalamic-pituitary-gonadal (HPG) axes, wherein the activation of one affects the function of the other and vice versa. ...
    • Stress promotes development of ovarian cysts in rats - The possible role of sympathetic nerve activation 
      Paredes Vargas, Alfonso; Gálvez, Anita; Leyton Canales, Víctor; Zúñiga Aravena, Gabriel; Fiedler Temer, Jenny; Bustamante Cádiz, Diego; Lara Peñaloza, Hernán (HUMANA PRESS INC, 1998-06)
      The ovarian content of neuropeptide Y (NPY) (colocalized with NE) was significantly decreased. These results suggest that NE synthesis and its secretion are increased during this period and correlate with the increase in ...
    • Stress promotes development of ovarian cysts in rats: The possible role of sympathetic nerve activation 
      Paredes, Alfonso; Gálvez, Anita; Leyton, Victor; Aravena, Gabriel; Fiedler Temer, Jenny; Bustamante, Diego; Lara Peñaloza, Hernán (1998)
      Activation of the sympathetic innervation precedes the induction of polycystic ovaries in rats given estradiol valerate (EV). The mechanism of induction by EV may thus involve both direct and neurogenic components. We ...
    • Stressing out the ER: A role of the unfolded protein response in prion-related disorders 
      Hetz Flores, Claudio; Soto, Claudio (2006)
      Transmissible Spongiform Encephalopathies are fatal and infectious neurodegenerative diseases characterized by extensive neuronal apoptosis and the accumulation of an abnormally folded form of the cellular prion protein ...
    • StructRNAfinder: an automated pipeline and web server for RNA families prediction 
      Arias Carrasco, Raúl; Vásquez Moran, Yessenia; Nakaya, Helder I.; Maracaja Coutinho, Vinicius (BIOMED Central Ltd., 2018)
      Background: The function of many noncoding RNAs (ncRNAs) depend upon their secondary structures. Over the last decades, several methodologies have been developed to predict such structures or to use them to functionally ...
    • Structural and photophysical properties of [(CO) 
      Gallardo, Hector; Cepeda-Plaza, Marjorie; Nonell, Santi; Günther Sapunar, Germán; Chamorro, Eduardo; Pizarro, Nancy; Vega, Andrés (Elsevier Ltd, 2015)
      © 2015 Elsevier Ltd. All rights reserved.The multimetallic complex [[(CO)<inf>3</inf>(phen)Re(μ-Br)Re(phen)(CO)<inf>3</inf>][(CO)<inf>3</inf>Re(μ-Br)<inf>3</inf>Re(CO)<i ...
    • Structural and photophysical properties of [(CO)(3)(phen) Re(mu-Br)Re(phen)(CO)(3)](+)[(CO)(3)(+)[Re(mu-B ... 
      Gallardo, Héctor; Cepeda Plaza, Marjorie; Nonell, Santi; Günther Sapunar, Germán; Chamorro, Eduardo; Pizarro, Nancy; Vega, Andrés (Elsevier, 2015)
      The multimetallic complex [[(CO)(3)(phen) Re(mu-Br)Re(phen)(CO)(3)][(CO)(3)[Re(mu-Br)(3)Re(CO)(3)]]center dot CH2Cl2 was prepared by direct reaction of (Re(CO)(3)(THF)Br)(2) (THF: tetrahydrofuran) and 1,10-phenanthroline ...
    • Structural changes in DODAC unilamellar liposomes by addition of sucrose esters monitored by using fluorescent ... 
      Lemp Miranda, Else; Zanocco Loyola, Antonio; Günther Sapunar, Germán (ELSEVIER SCIENCE BV, 2003-11-24)
      The effect of the incorporation of the non-ionic surfactant sucrose palmitate in dioctadecyldimethylammonium chloride(DODAC) large unilamellar vesicles was studies by using several spectroscopic techniques. Significant ...
    • Structural effects on the reactivity 1,4-dihydropyridines with alkylperoxyl radicals and ABTS radical cation 
      Yáñez Soto, Claudia; Lápez Alarcón, Camilo Ignacio; Camargo Grandón, Rodrigo; Valenzuela, V.; Squella Serrano, Juan; Núñez Vergara, Luis (PERGAMON-ELSEVIER SCIENCE, 2004-05-01)
      A series of eight commercial C-4 substituted 1,4-dihydropyridines and other synthesized related compounds were tested for direct potential scavenger effect towards alkylperoxyl radicals and ABTS radical cation in aqueous ...
    • Structural Effects upon Catalysis by Cationic Micelles 
      Bunton, C. A.; Robinson, L.; Sepulveda, L. (1970)
      The catalytic efficiencies of phenyl- and 2,4-dimethoxyphenylcetyldimethylammonium bromides (CPDA and CDPDA) are greater than that of cetyltrimethylammonium bromide (CTABr) for the spontaneous hydrolyses of the dianions ...
    • Structural elucidation and antimicrobial characterization of novel diterpenoids from Fabiana densa var. ramulosa 
      Quaglio, Deborah; Corradi, Silvia; Erazo Giuffra, Silvia; Vergine, Valeria; Berardozzi, Simone; Sciubba, Fabio; Cappiello, Floriana; Crestoni, María Elisa; Ascenzioni, Fiorentina; Imperi, Francesco; Delle Monache, Franco; Mori, Mattia; Loffredo, Maria Rosa; Ghirga, Francesca; Casciaro, Bruno; Botta, Bruno; Mangoni, Maria Luisa (American Chemical Society, 2020)
      Novel diterpenoids were isolated from the extracts of Fabiana densa var. ramulosa and found to display a selective activity against Gram-positive bacterial strains with negligible cytotoxicity toward human keratinocytes. ...
    • Structural elucidation of bioactive principles in floral extracts of german chamomille (matricaria recutita L.) 
      Buono Core, Gonzalo; Vanessa Núñez, M.; Lucero, Andrea; Vargas M., Robinson; Jullian Matthaei, Carolina (Sociedad Chilena de Quimica, 2011)
      In this work, bioactive compounds present in flower heads of German Chamomille, were extracted and isolated in pure forms by chromatographic techniques. These compounds, spiroketal enol ethers, present in both isomeric ...