Browsing by Title Artículos de revistas

Now showing items 4227-4246 of 4968

    • Summary of the third international workshop on iron and copper homeostasis 
      Núñez González, Marco; Garrick, Michael D. (SOCIEDAD BIOLGIA CHILE, 2006)
    • Summer dynamics of the deep chlorophyll maximum in Lake Tahoe 
      Coon, Thomas G.; Lopez, Matilde M.; Richerson, Peter J.; Powell, Thomas M.; Goldman, Charles R. (1987)
      Vertical profiles of chlorophyll and phytoplankton biomass were measured in Lake Tahoe from July 1976 through April 1977. A deep chlorophyll maximum (DCM) persisted during summer and early autumn (July-October) near 100 ...
    • Sums of squares of linear forms 
      Baeza, R.; Leep, D.; O'Ryan, M.; Prieto, J. P. (Springer-Verlag, 1986)
    • Superoxide dismutase is a critical enzyme to alleviate oxidative stress in Aloe vera (L.) Burm. plants ... 
      Ramírez, Isabel; Estay, Darío; Stange Klein, Claudia; Cardemil, Liliana (2012)
      Background:Aloe vera, a plant with crassulacean acid metabolism naturally adapted to water deficit, was introduced in the semi-arid regions of Chile in 1999.Aims: Our objective was to evaluate how A. vera scavenged the ...
    • Supersymmetric Majorana quantum cosmologies 
      Hojman Guiñerman, Sergio; Asenjo, Felipe A. (American Physical Society, 2015)
      The Einstein equations for an isotropic and homogeneous Friedmann-Robertson-Walker universe in the presence of a quintessence scalar field are shown to be described in a compact way, formally identical to the dynamics of ...
    • Suppression of neuroinflammation in forebrain-specific Cdk5 conditional knockout mice by PPARγ agonist ... 
      Utreras Puratich, Elías; Hamada, Ryusuke; Prochazkova, Michaela; Terse, Anita; Takahashi, Satoru; Ohshima, Toshio; Kulkarni, Ashok B. (BioMed Central Ltd., 2014)
      Background: Cyclin-dependent kinase 5 (Cdk5) is essential for brain development and function, and its deregulated expression is implicated in some of neurodegenerative diseases. We reported earlier that the forebrain-specific ...
    • Sur Les AlgÈbres De Bernstein 
      Alcalde, M. T.; Burgueno, C.; Labra, A.; Micali, A. (1989)
      Le but de cet article est de revoir les algebres de Bernstein au point de vue structure et de decrire les derivations et automorphismes de telles algebres aussi bien en caracteristique 2 qu'en caracteristique different de ...
    • Surface Bound States in the Continuum 
      Molina Gálvez, Mario; Miroshnichenko, Andrey E.; Kivshar, Yuri S. (AMER PHYSICAL SOC, 2012-02-13)
      We introduce a novel concept of surface bound states in the continuum, i.e., surface modes embedded into the linear spectral band of a discrete lattice. We suggest an efficient method for creating such surface modes and ...
    • Surface enhanced raman scattering of trans-p-coumaric and syringic acids 
      Clavijo Campos, Ernesto; Ross, D. J.; Aroca, R. F. (2009)
      The vibrational spectra of trans-p-coumaric acid (pCA) and syringic acid (SA) are discussed. The spectral fingerprints of the organic acids observed in the infrared and Raman spectra are assigned to fundamental vibrational ...
    • Surface enhanced Raman scattering study of l-lysine 
      Aliaga, A. E.; Osorio Román, Igor; Garrido, C.; Leyton, P.; Cárcamo Vega, José; Clavijo Campos, Ernesto; Gómez Jeria, Juan; Díaz Fleming, Guillermo; Campos Vallette, Marcelo (2009)
      Different SERS spectra of lysine (Lys) in Ag colloidal surface were obtained. No identical SERS spectra of Lys were observed after a stabilization period, suggesting that a unique conformation and orientation on the metal ...
    • Surface enhanced Raman scattering study of the antioxidant alkaloid boldine using prismatic silver nanoparticles 
      Herrera, M .A.; Jara, G. P.; Villarroel, R.; Aliaga, A. E.; Gómez Jeria, Juan; Clavijo Campos, Ernesto; Garrido, C.; Aguayo, T.; Campos Vallette, Marcelo (Elsevier, 2013)
      Prismatic silver nanoparticles (PNps) were used in the surface enhanced Raman scattering (SERS) study of the antioxidant alkaloid boldine (5,6,6a,7-tetrahydro-1,10-dimethoxy-6-methyl-4H-dibenzo[de,g]quinoline-2,9-diol). ...
    • 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 ...
    • Surface enhanced vibrational (IR and Raman) spectroscopy in the design of chemosensors based on ester ... 
      Leyton, Patricio; Domingo, C.; Sánchez Cortés, S.; Campos Vallette, Marcelo; García Ramos, J. V. (AMER CHEMICAL SOC, 2005-12-06)
      Surface-enhanced IR (SEIR) and Raman scattering (SERS) have been employed to study the adsorption of ester functionalized tert-butyl calix[4]arenes on Ag and Au nanostructured surfaces as well as their complexes with pyrene. ...
    • Surface functionalization of an aluminum alloy to generate an antibiofilm coating based on poly(methyl ... 
      Muñoz, Lisa; Tamayo, Laura; Gulppi, Miguel; Rabagliati, Franco M.; Flores Carrasco, Marcos; Urzúa Acevedo, Marcela; Azócar, Manuel; Zagal Moya, José H.; Encinas, María V.; Zhou, Xiaorong; Thompson, George; Páez, Maritza (MDPI AG, 2018)
      © 2018 by the authors. An experimental protocol was studied to improve the adhesion of a polymeric poly(methyl methacrylate) coating that was modified with silver nanoparticles to an aluminum alloy, AA2024. The nanoparticles ...
    • Surface multi-gap vector solitons 
      Garanovich, Ivan L.; Sukhorukov, Andrey A.; Kivshar, Yuri S.; Molina Gálvez, Mario (Optical Society of American (OSA), 2006)
      We analyze nonlinear collective effects near surfaces of semiinfinite periodic systems with multi-gap transmission spectra and introduce a novel concept of multi-gap surface solitons as mutually trapped surface states with ...
    • Surface on Surface. Survey of the Monolayer Gold-Graphene Interaction from Au12 and PAH via Relativistic ... 
      Muñoz Castro, Alvaro; Gómez, Tatiana; MacLeod Carey, Desmond; Miranda Rojas, Sebastián; Mendizábal Emaldía, Fernando; Zagal Moya, José H.; Arratia Pérez, Ramiro (American Chemical Society, 2016)
      © 2016 American Chemical Society.Gold-graphene interaction at the interface is evaluated through different polyaromatic hydrocarbons (PAH), accounted by C6H6, C24H12, C54H16, and C96H18, focusing into different energetic ...
    • Surface on Surface. Survey of the Monolayer Gold−Graphene Interaction from Au12 and PAH via Relativistic ... 
      Muñoz Castro, Álvaro; Gómez, Tatiana; MacLeod Carey, Desmond; Miranda Rojas, Sebastián; Mendizábal Emaldía, Fernando; Zagal Moya, José H.; Arratia Pérez, Ramiro (Amer Chemical Society, 2016)
      Gold−graphene interaction at the interface is evaluated through different polyaromatic hydrocarbons (PAH), accounted by C6H6, C24H12, C54H16, and C96H18, focusing into different energetic terms related to the overall ...
    • Surface properties of cationic polyelectrolytes hydrophobically modified 
      Ríos, Hernán E.; González Navarrete, Javier; Vargas, Víctor; Urzúa Acevedo, Marcela (Elsevier, 2011)
      Poly (N,N-dimethyl-N,N-diallyl ammonium) chloride, a highly hydrophilic polyelectrolyte, was hydrophobically modified and the surface properties of the resulting amphipathic polyelectrolytes were determined. The surface ...
    • Surface roughness and size effects of thin gold films on mica 
      Munoz, Raúl C.; Concha, Andres; Mora, Fernando; Espejo, Roberto; Vidal, Guillermo; Mulsow, Marcelo; Arenas, Claudio (2000)
      We report measurements of the topography of a gold film deposited on a mica substrate using scanning tunneling microscope (STM), and measurements of the conductivity σ of the film performed between 4 and 300 K. From images ...
    • Surface roughness and surface-induced resistivity of gold films on mica: Influence of roughness modelling 
      Munoz, Raúl C.; Vidal, Guillermo; Kremer, Germán; Moraga, Luis; Arenas, Claudio; Concha, Andres (2000)
      We report measurements of the temperature dependent resistivity ρ(T) of a gold film 70 nm thick deposited on mica preheated to 300°C in UHV, performed between 4 K and 300 K, and measurements of the surface topography of ...