Artículos de revistas: Recent submissions

Now showing items 4561-4580 of 4968

    • Synthetic homoserine lactone-derived sulfonylureas as inhibitors of Vibrio fischeri quorum sensing regulator 
      Frezza, Marine; Soulère, Laurent; Reverchon, Sylvie; Guiliani Guerin, Nicolás; Jerez Guevara, Carlos; Queneau, Yves; Doutheau, Alain (PERGAMON-ELSEVIER, 2008-04-01)
      A series of 9 homoserine lactone-derived sulfonylureas substituted by an alkyl chain, some of them bearing a phenyl group at the extremity, have been prepared. All compounds were found to inhibit the action of 3-oxo-hexa ...
    • Identification of differentially expressed genes in an industrial bioleaching heap processing low-grade ... 
      Galleguillos, Pedro; Remonsellez, Francisco; Galleguillos, Felipe; Guiliani Guerin, Nicolás; Castillo, Danny; Demergasso, Cecilia (ELSEVIER, 2008-11)
      During the past few decades the microbial bioleaching of metallic sulphide ores has become a very important process utilized by the mining industry. The biodiversity studies of industrial systems have revealed the occurrence ...
    • Chemical reactivity of oxygen vacancies on the MgO surface: Reactions with CO2, NO2 and metals 
      Florez, Elizabeth; Fuentealba Rosas, Patricio; Mondragón, Fanor (ELSEVIER, 2008-06)
      Density functional theory was used to investigate the chemical reactivity of oxygen vacancies on the MgO surface towards CO2, NO2 and metal atoms. The oxygen vacancies induce changes in the electronic structure of the MgO ...
    • Theoretical surface-enhanced Raman spectra study of substituted benzenes II. Density functional theoretical ... 
      Díaz Fleming, Guillermo; Golsio, Italo; Aracena, Andrés; Celis, Freddy; Vera, Leticia; Koch, Rainer; Campos Vallette, Marcelo (PERGAMON-ELSEVIER SCIENCE LTD, 2008-12-01)
      The SERS modelling of o-, m-, and p-methoxybenzonitrile has been performed following the same methodology that in Part I. Optimized structure obtained from DFT calculations in a B3LYP-LANL2DZ level of calculation shows ...
    • Theoretical surface-enhanced Raman spectra study of substituted benzenes I. Density functional theoretical ... 
      Díaz Fleming, Guillermo; Golsio, Italo; Aracena, Andrés; Celis, Freddy; Vera, Leticia; Koch, Rainer; Campos Vallette, Marcelo (PERGAMON-ELSEVIER SCIENCE LTD, 2008-12-01)
      This paper reports a DFT modelling of SERS spectra for benzene and benzonitrile on the basis of a simple noncoordinate substrate-adsorbate model. Assignment of normal modes was obtained from internal force constants and ...
    • Simultaneous determination of acetaminophen and tramadol by second derivative spectrophotometry 
      Toral Ponce, María; Rivas, Jorge; Sadías, Marta; Soto Salazar, César; Orellana, Sandra (SOC CHILENA QUIMICA, 2008-06)
      A rapid method for the simultaneous determination of acetaminophen (A) and tramadol (T) by second derivative spectrophotometric has been developed. From a solvent effect studies and the spectral behaviours of A and T, ...
    • Theoretical study of the aggregation of d(10)-s(2) Au(I)-Tl(I) complexes in extended unsupported chains 
      Fernández, Eduardo J.; Laguna, Antonio; López de Luzuriaga, José M.; Monge, Miguel; Mendizábal Emaldía, Fernando (ELSEVIER, 2008)
      Model compounds are used to study the metallophilic attraction between gold and thallium atoms. Ab initio calculations on dimers and tetramers in different distributions of the minimal units are analyzed. An attraction is ...
    • Regulation of Dendritic Cell Migration by CD74, the MHC Class II-Associated Invariant Chain 
      Faure-André, Gabrielle; Vargas, Pablo; Yuseff, Maria-Isabel; Heuzé, Mélina; Diaz, Jheimmy; Lankar, Danielle; Steri, Veronica; Manry, Jeremy; Hugues, Stéphanie; Vascotto, Fulvia; Boulanger, Jérôme; Raposo, Graça; Bono Merino, María Rosa; Rosemblatt Silber, Mario César; Piel, Matthieu; Lennon Duménil, Ana María (AMER ASSOC ADVANCEMENT SCIENCE, 2008-12-12)
      Dendritic cells ( DCs) sample peripheral tissues of the body in search of antigens to present to T cells. This requires two processes, antigen processing and cell motility, originally thought to occur independently. We ...
    • Geographical variation in the use of intertidal rocky shores by the lizard Microlophus atacamensis in ... 
      Fariña, José M.; Sepúlveda, M.; Reyna, M. V.; Wallem, K. P.; Ossa-Zazzali, P. G. (BLACKWELL, 2008-05)
      The movement of materials and organisms between ecosystems is a common process in nature. In the present study we investigate the hypothesis that the movement of consumers between ecosystems depends not only on the ...
    • A Sarcocystid Misidentified as Hepatozoon didelphydis: Molecular Data from a Parasitic Infection in the ... 
      Merino, Santiago; Vásquez Salfate, Rodrigo; Martínez, Javier; Celis Diez, Juan Luis; Martínez de la Fuente, Josué; Marín Vial, Paula; Sánchez Monsalvez, Inocencia; Peirce, Michael A. (BLACKWELL, 2008-12)
      The blood of 21 adult South American mouse opossums (Thylamys elegans) captured from April through August of 2005 in central Chile was examined for parasites. Light microscopic analysis of blood smears initially suggested ...
    • Haematozoa in forest birds from southern Chile: Latitudinal gradients in prevalence and parasite lineage richness 
      Merino, Santiago; Moreno, Juan; Vásquez Salfate, Rodrigo; Martínez, Javier; Sánchez Monsalvez, Inocencia; Estades Marfán, Cristián; Ippi, Silvina; Sabat Kirkwood, Alejandro Pablo; Rozzi, Ricardo; Mcgehee, Steven (BLACKWELL, 2008-05)
      The existence of latitudinal gradients in species richness and their abundance is known for many free living organisms but few cases have been reported for parasitic diseases. In addition, asymmetries between the Northern ...
    • Daucus carota as a novel model to evaluate the effect of light on carotenogenic gene expression 
      Stange Klein, Claudia; Fuentes, Paulina; Handford, Michael; PIizarro, Lorena (SOC BIOLGIA CHILE, 2008)
      Carotenoids are synthesized in prokaryotic and eukaryotic organisms. In plants and algae, these lipophilic molecules possess antioxidant properties acting as reactive oxygen species scavengers and exert functional roles ...
    • Spatially localized modes in two-dimensional chirped photonic lattices 
      Molina Gálvez, Mario; Kartashov, Yaroslav V.; Torner, Lluis; Kivshar, Yuri S. (AMER PHYSICAL SOC, 2008-05)
      We numerically study both linear and nonlinear surface modes in semi-infinite chirped two-dimensional photonic lattices in the framework of an effective discrete nonlinear model. We demonstrate that the lattice chirp can ...
    • Bulk and surface localized modes on a magnetic nonlinear impurity 
      Molina Gálvez, Mario (ELSEVIER, 2008-11-17)
      We study localized modes on a single magnetic impurity positioned in the bulk or at the surface of a one-dimensional chain, in the presence of a magnetic field 8 acting at the impurity site. The strong on-site nonlinear ...
    • Molecular insights into quorum sensing in Acidithiobacillus ferrooxidans bacteria via molecular modelling ... 
      Soulère, Laurent; Guiliani Guerin, Nicolás; Queneau, Yves; Jerez Guevara, Carlos; Doutheau, Alain (SPRINGER, 2008-07)
      Amino acid sequence alignments of the transcriptional regulator AfeR, which is involved in type 1 quorum sensing (QS) in Acidithiobacillus ferrooxidans bacteria, with other acyl homoserine lactone (AHL)- dependent QS ...
    • Interface solitons in two-dimensional photonic lattices 
      Molina Gálvez, Mario; Kivshar, Yuri S. (OPTICAL SOC AMER, 2008-12-01)
      We analyze localization of light at the interfaces separating square and hexagonal photonic lattices, as recently realized experimentally for two-dimensional laser-written waveguides in silica glass with self-focusing ...
    • Nonlinear localized modes at phase-slip defects in waveguide arrays 
      Molina Gálvez, Mario; Kivshar, Yuri S. (OPTICAL SOC AMER, 2008-05-01)
      We study light localization at a phase-slip defect created by two semi-infinite mismatched identical arrays of coupled optical waveguides. We demonstrate that the nonlinear defect modes possess the specific properties of ...
    • Localized modes on an Ablowitz-Ladik nonlinear impurity 
      Molina Gálvez, Mario (ELSEVIER, 2008-10-13)
      We study localized modes on a single Ablowitz-Ladik impurity embedded in the bulk or at the surface of a one-dimensional linear lattice. Exact expressions are obtained for the bound state profile and energy. Dynamical ...
    • Strength of polycrystalline coarse-grained platinum to 330 GPa and of nanocrystalline platinum to 70 GPa ... 
      Singh, Anil K.; Liermann, Hanns-Peter; Akahama, Yuichi; Saxena, Surendra K.; Menéndez Proupin, Eduardo (AMER INST PHYSICS, 2008-03-15)
      X-ray diffraction patterns from platinum foil 300 nm grain size have been recorded up to 330 GPa using a beveled-anvil diamond cell. The compressive strength has been determined from the analysis of the diffraction ...
    • FIRST RECORD OF XYLOCOPA (SCHONNHERRIA) SPLENDIDULA LEPELETIER 1841 (HYMENOPTERA: APIDAE: XYLOCOPINI) IN ... 
      Montalva, José; Dudley, Leah S.; Arroyo, Mary T. K. (EDICIONES UNIV, CONCEPCION, COMITE DE PUBLICACION, 2008)
      Se reporta la presencia de Xylocopa splendidula para Santiago, Chile. En Marzo de 2007, hembras fueron observadas nidificando en Acacia dealbata Link y entre diciembre 2007 y febrero 2008 fueron observadas forrajeando ...