Browsing by Title Artículos de revistas

Now showing items 772-791 of 2801

    • 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 ...
    • DNA Extraction and Amplification from Contemporary Polynesian Bark-Cloth 
      Moncada, Ximena; Payacán, Claudia; Arriaza, Francisco; Lobos Camus, Sergio; Seelenfreund Hirsch, Daniela; Seelenfreund, Andrea (2013)
      Background: Paper mulberry has been used for thousands of years in Asia and Oceania for making paper and bark-cloth, respectively. Museums around the world hold valuable collections of Polynesian bark-cloth. Genetic ...
    • DNA isolation and AFLP fingerprinting of nectarine and peach varieties (Prunus persica) 
      Manubens, Augusto; Lobos, S.; Jadue, Yael; Toro, Manuel; Messina, Rosa; Lladser Prado, Manuel; Seelenfreund Hirsch, Daniela (Kluwr Academic Publisher, 1999)
      Traditional identification of peach and nectarine varieties relies on the assessment of agronomic traits of the adult plant. This leads to a significant delay of time, constraints to breeders in the surveillance of germplasm ...
    • DNA staining method based on formazan precipitation induced by blue light exposure 
      Paredes, Aaron J.; Alfaro Valdés, Hilda M.; Wilson Moya, Christian (Journal of Visualized Experiments, 2018)
      DNA staining methods are very important for biomedical research. We designed a simple method that allows DNA visualization to the naked eye by the formation of a colored precipitate. It works by soaking the acrylamide or ...
    • DNA, Cell Wall and General Oxidative Damage Underlie the Tellurite/Cefotaxime Synergistic Effect in Escherichia ... 
      Molina Quiroz, Roberto C.; Loyola, David E.; Muñoz Villagrán, Claudia; Quatrini, Raquel; Vásquez, Claudio C.; Pérez Donoso, José (PLoS ONE 8(11): e79499, 2013)
      The constant emergence of antibiotic multi-resistant pathogens is a concern worldwide. An alternative for bacterial treatment using nM concentrations of tellurite was recently proposed to boost antibiotic-toxicity and a ...
    • Domino inverse electron demand Diels-Alder reactions of chromones with ethyl vinyl ether 
      Heredia Moya, Jorge; Krohn, Karsten; Florke, Ulrich; Pessoa Mahana, Hernán; Weiss López, Boris; Estévez, A.; Araya Maturana, Ramiro (PERGAMON-ELSEVIER SCIENCE LTD, 2007-06-01)
      E)-Ethyl 3-(4-oxo-4H-chromen-3-yi)acrylate (3), (E)-3-(4-oxo-4H-chromen-3-yl)-2-propenenitrile (12) and their 5-hydroxy-derivatives 11 and 13 undergo alternative, solvent dependent, domino reactions with ethyl vinyl ether. ...
    • Dopamine in human follicular fluid is associated with cellular uptake and metabolism-dependent generation ... 
      Saller, Sabine; Kunz, L.; Berg, D.; Berg, U.; Lara Peñaloza, Hernán; Urra, J.; Hecht, S.; Pavlik, R.; Thaler, C.J.; Mayerhofer, A. (Oxford University Press, 2014)
      studyquestion: Is the neurotransmitter dopamine (DA) in the human ovary involved in the generation of reactive oxygen species (ROS)? summary answer: Human ovarian follicular fluid contains DA, which causes the generation ...
    • Dopamine-dependent iron toxicity in cells derived from rat hypothalamus 
      Paris Pizarro, Irmgard; Martínez Alvarado, P.; Cárdenas, S.; Pérez Pastene, C.; Graumann, Rebecca; Fuentes, P.; Olea Azar, Claudio; Caviedes Fernández, Pablo; Segura Aguilar, Juan (AMER CHEMICAL SOC, 2005-03)
      We report a new and specific mechanism for iron-mediated neurotoxicity using RCHT cells, which were derived from rat hypothalamus. RCHT cells exhibit immunofluorescent-positive markers for dopamine beta-hydroxylase and the ...
    • Dora B. Goldstein – In Memoriam 
      Israel Jacard, Yedy; Crabbe, John C.; Harris, R. Adron (WILEY-BLACKWELL, 2012)
    • Double emulsions as potential fat replacers with gallic acid and quercetin nanoemulsions in the aqueous phases 
      Silva, Wladimir; Torres Gatica, María Fernanda; Oyarzún Ampuero, Felipe; Silva Weiss, Andrea; Robert Canales, Paz; Cofrades, Susana; Giménez, Begoña (Elsevier, 2018)
      The development of fat replacers to obtain healthier/functional foods is a constant challenge. With this aim, double emulsions (DE) with a blend of olive, linseed and fish oils as oil phase were developed. To prevent the ...
    • Double emulsions with olive leaves extract as fat replacers in meat systems with high oxidative stability 
      Robert Canales, Paz; Zamorano, Marcela; Prado González, Estefanía; Silva-Weiss, Andrea; Cofrades, Susana; Giménez, Begoña (Elsevier Ltd, 2019)
      Double emulsions (DE) with a healthy oil blend as lipid phase and an olive leave extract (OLE) encapsulated in the internal aqueous phase (DE/OLE) were incorporated as fat replacers in meat systems, in order to improve ...
    • Down syndrome and Alzheimer's disease: common molecular traits beyond the amyloid precursor protein 
      Gómez, Wileidy; Morales, Rodrigo; Maracaja Coutinho, Vinicius; Parra Ortiz, Valentina; Nassif, Melissa (Impact Journals LLC, 2020)
      Alzheimer’s disease (AD) is the most prevalent type of dementia. Down syndrome (DS) is the leading genetic risk factor for Early-Onset AD, prematurely presenting the classic pathological features of the brain with AD. ...
    • Down syndrome critical region 1 gene, Rcan1, helps maintain a more fused Mitochondrial Network 
      Parra Ortíz, María Valentina; Altamirano, Francisco; Hernández Fuentes, Carolina; Tong, Dan; Kyrychenko, Victoriia; Rotter, David; Pedrozo Cibils, Zully; Hill, Joseph A.; Eisner, Verónica; Lavandero González, Sergio; Schneider, Jay W.; Rothermel, Beverly A. (Lippincott Williams & Wilkins, 2018)
      Rationale: The regulator of calcineurin 1 (RCAN1) inhibits CN (calcineurin), a Ca2+-activated protein phosphatase important in cardiac remodeling. In humans, RCAN1 is located on chromosome 21 in proximity to the Down ...
    • DPPH and oxygen free radicals as pro-oxidant of biomolecules 
      Letelier Muñoz, María Eugenia; Molina Berríos, Alfredo Enrique; Cortés Troncoso, Juan; Jara Sandoval, José; Holst, Marianne; Palma, Karina; Montoya, Margarita; Miranda, Dante; González Lira, Víctor (PERGAMON-ELSEVIER SCIENCE LTD, 2008-03)
      Numerous investigations exist about the alterations that oxygen free radicals can provoke on biomolecules; these modifications can be prevented and/or reversed by different antioxidants agents. On the other hand, ...
    • Drimenol: A versatile synthon for compounds with trans-drimane skeleton 
      Cortés, Manuel; Delgado, Virginia; Saitz Barría, Claudio; Armstrong, Verónica (2011)
      Several reviews have been published on sesquiterpenes, and on drimane-type sesquiterpenes, going through drimenol and related compounds among others. However, to our knowledge, this is the first review exclusively on ...
    • Drug-loaded lipid-core micelles in mucoadhesive films as a novel dosage form for buccal administration of ... 
      Chou, Wai-Houng; Galaz, Ariel; Jara, Miguel O.; Gamboa, Alexander; Morales Montecinos, Javier (MDPI, 2020)
      The aim of the study was to develop a novel buccal dosage form to transport rhodamine 123 and human insulin as models for poorly water-soluble and biological drugs, using lipid-core micelles (LCMs)-loaded mucoadhesive ...