Browsing by Title Artículos de revistas

Now showing items 38-57 of 2801

    • A non-conventional way to perform voltammetry 
      Moscoso Cabello, Raúl Andrés; Inostroza, E.; Squella Serrano, Juan (Elsevier, 2017)
      In a conventional voltammetric experiment, the electroactive species is dissolved in solution, and then diffuses from the solution phase to the electrode phase. In our proposed non-conventional voltammetric experiment, ...
    • A novel copper(II)-lanthanum(III) metal organic framework as a selective catalyst for the aerobic oxidation ... 
      Cancino, P.; Vega, Andrés; Santiago Portillo, Andrea; Navalon, Sergio; Alvaro, Mercedes; Aguirre Álvarez, Pedro; Spodine Spiridonova, Evgenia; García, Hermenegildo (Royal Society of Chemistry, 2016)
      The synthesis and structure of a novel heteronuclear Cu-II and La-III metal organic framework (MOF) having pyridinedicarboxylic acid (CuLa-MOF) is reported. The obtained MOF with the formula {[Cu0.5La2(HPDC)(PDC)(2)(SO4) ...
    • A novel in vivo model to study impaired tissue regeneration mediated by cigarette smoke 
      Alvarez, Marjorie; Chavez, Myra; Calorio Miranda, Miguel; Aedo, Geraldine; Allende Connelly, Miguel; Egaña, José (Nature Publishing Group, 2018)
      Cigarette smoke is associated with several pathologies including chronic respiratory diseases and cancer. In addition, exposure to cigarette smoke is correlated with impaired wound healing, where a significant decrease in ...
    • A phenolic-rich extract from ugni molinae berries reduces abnormal protein aggregation in a cellular model ... 
      Pérez Arancibia, Rodrigo Nicolás; Ordóñez, José Luis; Rivas, Alexis; Pihán, Philippe; Sagredo, Alfredo; Ahumada, Ulises; Barriga, Andrés; Seguel, Ivette; Cárdenas, César; Vidal, René L.; Hetz Flores, Claudio Andres; Delporte Vergara, Carla Luz (Public Library Science, 2021)
      Accumulation of misfolded proteins in the brain is a common hallmark of most age-related neurodegenerative diseases. Previous studies from our group identified the presence of anti-inflammatory and antioxidant compounds ...
    • A polarographic study of the photodegradation of nitrendipine 
      Squella Serrano, Juan; Zanocco, A.; Perna, S.; Núñez Vergara, Luis (1990)
      Nitrendipine produces a well-defined polarographic peak due to the four-electron reduction of the nitro group. This peak is used for tracking the photodecomposition of nitrendipine in both UV light and daylight conditions. ...
    • A polyphenol extract of tara pods (Caesalpinia spinosa) as a potential antioxidant in oils 
      Romero, Nalda; Fernández, Arturo; Robert Canales, Paz (2012)
      Tara is a native species of Peru and is widely distributed in Latin America; its fruits (pods) have a high potential for medical, industrial and food uses. A supercritical tara polyphenol extract (STPE) was obtained from ...
    • A Polyvinylpolypyrrolidone (PVPP)-Assisted Folin–Ciocalteu Assay to Assess Total Phenol Content of Commercial ... 
      Bridi, R.; Troncoso, M. J.; Folch Cano, Christian; Fuentes, J. Rodrigo; Speisky Cosoy, Hernán; López Alarcón, Camilo (Springer New York LLC, 2014)
      © 2014, Springer Science+Business Media New York. The use of a Folin–Ciocalteu (FC) assay to assess total phenolics in certain foods may be limited by the inability of this assay to discriminate between phenolics and ...
    • A pooled RP/SP mode, route and destination choice model to investigate mode and user-type effects in the ... 
      Schmid, Basil; Jokubauskaite, Simona; Aschauer, Florian; Peer, Stefanie; Hössinger, Reinhard; Gerike, Regine; Jara Díaz, Sergio; Axhausen, Kay W. (Elsevier Ltd, 2019)
      Being of great importance for transportation policy appraisals, we investigate mode and user-type effects in the value of travel time savings (VTTS) using a pooled RP/SP Mixed Logit modeling approach for mode, route and ...
    • A practical amine-free synthesis of symmetric ureas and thioureas by self-condensation if iso(thio)cyanates 
      Jiménez Blanco, José L.; Saitz Barría, Claudio; Benito, Juan M.; Ortíz Mellet, Carmen; Fuentes, José; Santoyo González, Francisco; García Fernández, José M. (Thieme Stuttgart, 1999)
      Isocianates and isothiocyanates are readily transformed into the corresponding symmetric N,N'-disubstituted ureas and thioureas upon treatment with pyridine-water with no formation of side products. Evidence is shown for ...
    • A regulatory RNA is involved in RNA duplex formation and biofilm regulation in sulfolobus acidocaldarius 
      Orell, Alvaro; Tripp, Vanessa; Aliaga-Tobar, Victor; Albers, Sonja-Verena; Maracaja Coutinho, Vinicius; Randau, Lennart (Oxford University Press, 2018-05-18)
      Non-coding RNAs (ncRNA) are involved in essential biological processes in all three domains of life. The regulatory potential of ncRNAs in Archaea is, however, not fully explored. In this study, RNA-seq analyses identified ...
    • A research note on rheological behavior of some processed products from cactus pear (Opuntia ficus-indica ... 
      Cerezal Mezquita, Pedro; Castro Montero, Eduardo; Duarte, G. (BLACKWELL PUBLISHING, 2007-12)
      A study of some textural and rheological properties of cactus pear products was carried out in this research. The parameters of brittleness and hardness in peeled cactus pears in syrup (PCPS), and the compression stress ...
    • A reusable CuII based metal-organic framework as a catalyst for the oxidation of olefins 
      Cancino, Patricio; Paredes García, Verónica; Aguirre, Pedro; Spodine Spiridonova, Evgenia (Royal Society of Chemistry, 2014)
      The metal-organic framework [Cu2(bipy)2(btec)] ∞ was used as a heterogeneous catalyst in the liquid phase oxidation of styrene and cyclohexene with tert-butylhydroperoxide (TBHP) as the oxidant either in water-dichloroethane ...
    • A role for adrenaline and calmodulin in modulating cyclic AMP levels during the lactogenic cycle 
      Muñoz, Aira; Lavandero González, Sergio; Donoso, Eduardo; Puente Piccardo, Javier; Sapag Hagar, Mario (1985)
      The effect on lactose production of several external modulators of intracellular cyclic AMP was studied in rat mammary gland tissue slices and explants. Adrenaline, a β-adrenergic receptor effector, forskolin, a direct ...
    • A simple derivatization of multiwalled carbon nanotubes with nitroaromatics in aqueous media: Modification ... 
      Moscoso Cabello, Raúl Andrés; Carbajo, J.; López, M.; Núñez Vergara, Luis; Squella Serrano, Juan (ELSEVIER SCIENCE INC, 2011-02)
      We report that GCE modified with MWCNTs can be derivatized by the nitroaromatic drug nitrendipine (NTD) ((RS)-ethyl methyl 2,6-dimethyl-4-(3-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate) simply by dipping the electrode ...
    • A Synthetic Overview of New Molecules with 5-HT1A Binding Affinities 
      Araya Maturana, Ramiro; Saitz Barría, Claudio; Pessoa Mahana, Hernán; Pessoa, D. (Bentham Science Publishers, 2003)
      The present review discusses the synthetic strategies of new ligands exhibiting mainly 5-HT1A binding affinities. Specifically we focused our attention in the synthesis of compounds structurally related to arylpiperazine, ...
    • A systematic study of antibacterial silver nanoparticles: efficiency, enhanced permeability, and cytotoxic effects 
      Azócar, Manuel; Tamayo, Laura; Vejar, Nelson; Gómez, Grace; Zhou, Xiangrong; Thompsom, George; Cerda, Enrique; Kogan Bocian, Marcelo; Salas, Edison; Páez, Maritza (Kluwer Academic Publishers, 2014)
      We report here a systematic study of the antibacterial behavior of silver nanoparticles coated with fatty acids (oleic: AgNP-O, linoleic: AgNP-L, and palmitic acids: AgNP-P) in water. We have found remarkable differences ...
    • A tale of textiles: Genetic characterization of historical paper mulberry barkcloth from Oceania 
      Peña Ahumada, Bárbara; Saldarriaga Córdoba, Mónica; Kardailsky, Olga; Moncada, Ximena; Moraga Vergara, Mauricio; Matisoo Smith, Elizabeth; Seelenfreund, Daniela; Seelenfreund, Andrea (Public Library Science, 2020)
      Humans introduced paper mulberry (Broussonetia papyrifera) from Taiwan into the Pacific over 5000 years ago as a fiber source to make barkcloth textiles that were, and still are, important cultural artifacts throughout the ...
    • A taxonomy for Whole Building Life Cycle Assessment (WBLCA) 
      Rodriguez, Barbara X.; Simonen, Kathrina; Huang, Monica; De Wolf, Catherine (Emerald Group Publishing Ltd., 2019)
      Purpose: The purpose of this paper is to present an analysis of common parameters in existing tools that provide guidance to carry out Whole Building Life Cycle Assessment (WBLCA) and proposes a new taxonomy, a catalogue ...
    • A tRNA(Glu) that uncouples protein and tetrapyrrole biosynthesis 
      Levicán, Gloria; Katz, Assaf; Valenzuela, Patricio; Söll, Dieter; Orellana, Omar (2005)
      Glu-tRNA is either bound to elongation factor Tu to enter protein synthesis or is reduced by glutamyl-tRNA reductase (GluTR) in the first step of tetrapyrrole biosynthesis in most bacteria, archaea and in chloroplasts. ...
    • A Vibrational and theoretical interpretation of the conformation of mono- and disubstituted N-benzylideneanilines 
      Figueroa, K.; Campos Vallette, Marcelo; Quezada, E.; Venegas, D.; Quiroz, A. (1991)
      Infrared data for N-benzylideneanilines mono- and disubstituted predict, in agreement with CNDO molecular orbital calculations, that the internal energy transfer is induced mainly by a donor group in para position of the ...