Artículos de revistas: Recent submissions

Now showing items 4681-4700 of 4968

    • Lymphoid B cells induce NF-kappa B activation in high endothelial cells from human tonsils 
      Naves, Rodrigo; Reyes, Lilian I.; Rosemblatt Silber, Mario César; Jacobelli, Sergio; González, Alfonso; Bono Merino, María Rosa (OXFORD UNIV PRESS, 2006-02)
      Immune surveillance depends on still poorly understood lymphocyte-endothelium interactions required for lymphocyte transendothelial migration into secondary lymphoid organs. The nuclear factor kappa B (NF-kappa B) regulatory ...
    • On uniformly quasisymmetric groups of circle diffeomorphisms 
      Navas Flores, Andrés (SUOMALAINEN TIEDEAKATEMIA, 2006)
      This article deals with the conjugacy problem of uniformly quasisymmetric groups of circle homeomorphims to groups of Mobius transformations. We prove that if the involved maps have some degree of regularity and the uniform ...
    • Reduction of cocycles and groups of diffeomorphisms of the circle 
      Navas Flores, Andrés (BELGIAN MATHEMATICAL SOC TRIOMPHE, 2006-06)
      We prove two theorems of reduction of cocycles taking values in the group of diffeomorphisms of the circle. They generalize previous results obtained by the author concerning rigidity for smooth actions on the circle of ...
    • Magnetic resonance study of vanadium pentoxide gels 
      Nascimento, Otaciro R.; Magon, Claudio José; Lopes, L. V. S.; Donoso, José Pedro; Benavente Espinosa, Eglantina; Páez, J.; Lavayen, Vladimir; Santa Ana, María Angélica; González Moraga, Guillermo (TAYLOR & FRANCIS LTD, 2006)
      This work describes an Electron Paramagnetic Resonance (EPR) and Nuclear Magnetic Resonance (NMR) study of the vanadium pentoxide xerogel V2O5:nH(2)O with n approximate to 1.8 Experiments were performed in the temperature ...
    • The prion strain phenomenon: Molecular basis and unprecedented features 
      Morales, Rodrigo; Abid, Karim; Soto, Claudio (ELSEVIER SCIENCE BV, 2007-06)
      Prions are unconventional infectious agents responsible for transmissible spongiform encephalopathies. Compelling evidences indicate that prions are composed exclusively by a misfolded form of the prion protein (PrPSc) ...
    • A nonextensive statistics approach for Langmuir waves in relativistic plasmas 
      Muñoz Gálvez, Víctor (EUROPEAN GEOSCIENCES UNION, 2006)
      The nonextensive statistics formalism proposed by Tsallis has found many applications in systems with memory effects, long range spatial correlations, and in general whenever the phase space has fractal or multi-fractal ...
    • Stage-dependent patterns of drought tolerance and gas exchange vary between sexes in the alpine willow, ... 
      Dudley, Leah S.; Galen, Candace (SPRINGER, 2007-08)
      Females and males of sexually dimorphic species have distinct resource demands due to differential allocation to reproduction. Sexual allocation theory predicts that functional traits will diverge between sexes to support ...
    • Alteration of the hydrologic cycle due to forest clearing and its consequences for rainforest succession 
      Díaz, María Francisca; Bigelow, Seth; Armesto, Juan J. (ELSEVIER SCIENCE BV, 2007-06)
      Since the 19th century, 41% of the land on Chiloe´ Island (418500S, 738400W) in Chile was cleared. Following clearing and burning, much of the converted land remains in sparse shrub cover. We hypothesized that the arrested ...
    • Patterns of endemism in south-eastern Pacific benthic polychaetes of the Chilean coast 
      Moreno, Rodrigo A.; Hernández, Cristián; Rivadeneira, Marcelo; Vidal, Marcela A.; Rozbaczylo, Nicolás (BLACKWELL, 2006-04)
      Aim In this study we evaluate patterns of endemism for benthic polychaete species along the southeastern Pacific coast of Chile. Our goals were (1) to describe latitudinal gradients of endemism and identify areas of high ...
    • Functionalization of bentonite by intercalation of surfactants 
      Moreno, Mabel; Benavente Espinosa, Eglantina; González Moraga, Guillermo; Lavayen, Vladimir; Sotomayor Torres, Clivia (TAYLOR & FRANCIS, 2006)
      The functionalization of bentonite by intercalation of surfactants dodecylamine, hexadecylamine, octadecylamine, and the octadecyltrimethylammonium cation is described. Products are characterized by elemental analysis, ...
    • Discrete surface solitons in semi-infinite binary waveguide arrays 
      Molina Gálvez, Mario; Garanovich, Ivan L.; Sukhorukov, Andrey A.; Kivshar, Yuri S. (OPTICAL SOC AMER, 2006-08-01)
      We analyze discrete surface modes in semi-infinite binary waveguide arrays, which can support simultaneously two types of discrete solitons. We demonstrate that the analysis of linear surface states in such arrays provides ...
    • Recent IBA setup improvements in Chile 
      Miranda, P. A.; Chesta, Miguel Ángel; Cancino, S. A.; Morales Peña, José; Dinator Ramírez, María Inés; Wachter, J. A.; Tenreiro, C. (ELSEVIER, 2006-07)
      This paper describes the main characteristics of the ion beam facility based on a 3.75 MeV Van de Graaff accelerator model KN3750 of HVE at the University of Chile. Recent setup improvements on three beam lines available, ...
    • Impurity modes and wave scattering in discrete chains with nonlinear defect states 
      Molina Gálvez, Mario; Vicencio Poblete, Rodrigo; Kivshar, Yuri S. (ELSEVIER, 2006-01-30)
      We study the properties of localized impurity modes and the transmission of plane waves across a general nonlinear impurity embedded in an infinite one-dimensional linear chain. Using the formalism of the lattice Green ...
    • Discrete solitons and nonlinear surface modes in semi-infinite waveguide arrays 
      Molina Gálvez, Mario; Vicencio Poblete, Rodrigo; Kivshar, Yuri S. (OPTICAL SOC AMER, 2006-06-01)
      We discuss the formation of self-trapped localized states near the edge of a semi-infinite array of nonlinear optical waveguides. We study a crossover from nonlinear surface states to discrete solitons by analyzing the ...
    • Surface Enhanced Raman Spectrum of Nanometric Molecular Systems 
      Leyton, Patricio; Lizama Vergara, P. A.; Campos Vallette, Marcelo; Becker, María Inés; Clavijo Campos, Ernesto; Córdova Reyes, I.; Vera, M.; Jerez Guevara, Carlos (SOCIEDAD CHILENA DE QUIMICA, 2005-12)
      Surface-enhanced Raman spectroscopy (SERS) was demonstrated to be a useful and sensitive structural spectroscopic tool for the characterization of different types of supramolecular architectures, ideally suited for trace ...
    • "Para-Ni-Tetraaminophenylporphyrin/Co-Cobaltite/SnO2:F Modified Electrodes: Electrocatalytic Behavior Toward ... 
      Bravo, Paz; Isaacs, Fabiola; Ramírez, Galo; Armijo, Francisco; Isaacs Casanova, Mauricio; Aguirre, María Jesús; Zamora, Claudia; Trollund, Ejnar (SOCIEDAD CHILENA DE QUIMICA, 2005-12)
      The aim of this work was the study of three different modified electrodes where the substrate and the porphyrin used to modify the electrodic surface was the same. The surface electrode was a glass covered by a layer of ...
    • Caracterización de obsidianas del norte y centro sur de Chile mediante análisis de fluorescencia de rayos X 
      Seelenfreund, Andrea; Miranda, Javier; Dinator Ramírez, María Inés; Morales Peña, José (Universidad de Tarapacá, Facultad de Ciencias Sociales Administrativas y Económicas, Departamento de Antropología, 2005-12)
      Con el objeto de estudiar la procedencia de obsidianas encontradas en sitios arqueológicos y caracterizar fuentes de obsidiana en distintas partes de Chile, iniciamos un estudio de caracterización de fuentes por medio de ...
    • The modular structure of the floral phenotype in Mimulus luteus var. luteus (Phrymaceae) 
      Carvallo, Gastón; Medel Contreras, Rodrigo (SOCIEDAD BIOLGIA CHILE, 2005-12)
      Most studies of multivariate evolution on the floral phenotype assume that traits evolve independently one from each other, ignoring the modular structure that results from genetic correlations or developmental constraints. ...
    • Ultraviolet Absorption Bands and Electronic Charge Transfers in Singlet Excited States of Sulfur Aromatic ... 
      Araya, Carmen G.; Vargas Cortés, Víctor; Morales, Raúl (SPECTROSCOPY LETTERS, 2005)
      Indoline-2-thione (BC), benzimidazole-2-thione (BN), benzoxazole-2-thione (BO), and benzothiazole-2-thione (BS) define an interesting series of aromatic compounds containing a NCS synthonic unit in a heterocyclic ring of ...
    • Thermolytic Transformation of Organometallic Polymers Containing the Cr(CO)5 Precursor into Nanostructured ... 
      Díaz Valenzuela, Carlos; Castillo, Paola; Valenzuela, María Luisa (JOURNAL OF CLUSTER SCIENCE, 2005-12)
      Thermal treatment in air of the organometallic polymer{[NP(O2C12H8)]0.8[NP(OC6H4CH2CN • [Cr(CO)5]0.13)2]0.18}n (1) results in the formation of nanometer-size metal oxide particles. Cr particles in the 35–85 nm range, ...