Repositorio Académico de la Universidad de Chile: Recent submissions

Now showing items 44321-44340 of 98648

    • 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 ...
    • Patterns and drivers of recent disturbances across the temperate forest biome 
      Sommerfeld, Andreas; Senf, Cornelius; Buma, Brian; D’Amato, Anthony W.; Després, Tiphaine; Díaz Hormazábal, Ignacio; Fraver, Shawn; Frelich, Lee E.; Gutiérrez, Álvaro G.; Hart, Sarah J.; Harvey, Brian J.; He, Hong S.; Hlásny, Tomáš; Holz, Andrés; Kitzberger, Thomas; Kul (Nature Publishing Group, 2018)
      © 2018, The Author(s). Increasing evidence indicates that forest disturbances are changing in response to global change, yet local variability in disturbance remains high. We quantified this considerable variability and ...
    • Vibrational and optical properties of CZTS derivatives for photovoltaic applications: Synthesis of ... 
      Pinto, C.; López, F.; Galdámez, A.; Barahona, P.; Moris, S. (Elsevier Masson SAS, 2018)
      © 2018 Elsevier Masson SAS Herein, we report the vibrational and optical properties of new Cu2ZnSn1-xGexS2Se2 solid solutions prepared by isomorphic substitution of a fraction of Se by S in Cu2ZnSn1-xGexSe4 (CZTGeSe) through ...
    • Vasodilator and hypotensive effects of pure compounds and hydroalcoholic extract of Xenophyllum poposum ... 
      Cifuentes, Fredi; Palacios, Javier; Kuzmicic, Jovan; Carvajal, Lorena; Muñoz, Fernanda; Quispe, Cristina; Nwokocha, Chukwuemeka R.; Morales, Glauco; Norambuena Soto, Ignacio; Chiong Lay, Mario; Paredes, Adrián (Elsevier GmbH, 2018)
      © 2018 Background: Xenophyllum poposum is an endemic species of the Andes Cordillera, popularly known as Popusa. Popusa is widely used by mountain communities as a folk medicine to treat altitude sickness and hypertension. ...
    • Er-doped nanostructured BaTiO3 for NIR to visible upconversion 
      Meneses Franco, Ariel; Campos Vallette, Marcelo; Vásquez Arancibia, Sergio; Soto Bustamante, Eduardo (MDPI AG, 2018)
      Photoluminescent mechanisms in erbium-doped barium titanate nanoparticle systems were studied. Er3+ ions were introduced into the BaTiO3 lattice by the sol-gel method. The resulting Er3+ concentration was between 0% and ...
    • Impact of environmental variables on PCDD/F and dl-PCB levels in dairy milk of the farming region of Chile 
      Pizarro Aránguiz, Nicolás; García Mendoza, Diego; Muñoz Obregón, Rubén; San Martín Núñez, Betty; Morales, Rodrigo (Pontificia Universidad Catolica de Chile, Facultad de Agronomia e Ingenieria Forestal, 2018)
      According to a One Health perspective, the importance of persistent organic pollutants (POPs) must be assessed because of their impact on the environment, food chain and human health. However, information on these toxic ...
    • Morphological characterization of sweet chestnut fruits from forest plantations in central Chile Caracterización ... 
      Benedetti, Susana; Balocchi, Francisco; Gonzalez, Marta; Garcia-Chevesich, Pablo (Pontificia Universidad Catolica de Chile, Facultad de Agronomia e Ingenieria Forestal, 2018)
      © 2018, Pontificia Universidad Catolica de Chile, Facultad de Agronomia e Ingenieria Forestal. All rights reserved. The sweet chestnut (Castanea sativa Mill.) is one of the most important starchy foods worldwide due to its ...
    • Energetics and electronic properties of interstitial chlorine in CdTe 
      Orellana, Walter; Menéndez Proupin, Eduardo; Flores, Mauricio A. (Wiley, 2018)
      The role of interstitial chlorine in the electronic properties of CdTe isaddressed by density functional theory calculations including hybrid func-tionals and large unit cells. The stability and diffusion energy barriers ...
    • Expression of the ectodomain-releasing protease ADAM17 is directly regulated by the osteosarcoma and ... 
      Araya López, Héctor; Sepulveda, Hugo; Lizama, Carlos O.; Vega Villa, Oscar; Jerez, Sofia; Briceño, Pedro F.; Thaler, Roman; Riester, Scott M.; Antonelli Anativia, Marcelo; Salazar Onfray, Flavio; Rodríguez Vives, Juan Pablo; Moreno, Ricardo D.; Montecino, Martín; Charbonneau, Martine; Dubois, Claire; Galindo Díaz, Mario; Stein, Gary; van Wijnen, Andre (Wiley-Liss Inc., 2018)
      Osteoblast differentiation is controlled by transcription factor RUNX2 which temporally activates or represses several bone-related genes, including those encoding extracellular matrix proteins or factors that control ...
    • The urban matrix matters: Quantifying the effects of surrounding urban vegetation on natural habitat remnants ... 
      Fernández, Ignacio C.; Wu, Jianguo; Simonetti Zambelli, Javier Andrés (Elsevier B.V., 2018)
      © 2018 Elsevier B.V. Urbanization destroys and fragments natural habitats, resulting in a system of natural remnants embedded in an urban matrix. Urban natural remnants (UNRs) can provide multiple ecosystem services for ...
    • Enhancement photocatalytic activity of the heterojunction of two-dimensional hybrid semiconductors ZnO/V2O5 
      Aliaga, Juan; Cifuentes, Nasla; González Moraga, Guillermo; Sotomayor Torres, Clivia; Benavente Espinosa, Eglantina (MDPI AG, 2018)
      © 2018 by the authors. Licensee MDPI, Basel, Switzerland. In this work, we report the fabrication of the new heterojunction of two 2D hybrid layered semiconductors—ZnO (stearic acid)/V2O5 (hexadecylamine)—and its behavior ...
    • Jitterbug/Filamin and Myosin-II form a complex in tendon cells required to maintain epithelial shape and ... 
      Manieu, Catalina; Olivares, Gonzalo H.; Vega-Macaya, Franco; Valdivia, Mauricio; Olguín, Patricio (Elsevier Ireland Ltd, 2018)
      © 2018 Elsevier B.V. During musculoskeletal system development, mechanical tension is generated between muscles and tendon-cells. This tension is required for muscle differentiation and is counterbalanced by tendon-cells ...
    • Cold-active pectinolytic activity produced by filamentous fungi associated with Antarctic marine sponges 
      Poveda, Gabriela; Gil Durán, Carlos; Vaca Cerezo, Inmaculada; Levicán, Gloria; Chávez, Renato (2018)
      BACKGROUND: Pectinase enzymes catalyze the breakdown of pectin, a key component of the plant cell wall. At industrial level, pectinases are used in diverse applications, especially in food-processing industry. Currently, ...
    • Saturable impurity in an optical array: Green function approach 
      Molina Gálvez, Mario (American Physical Society, 2018)
      © 2018 American Physical Society. We examine a one-dimensional linear waveguide array containing a single saturable waveguide. By using the formalism of lattice Green functions, we compute in closed form the localized mode ...
    • A systematic electronic structure study of the O–O bond dissociation energy of hydrogen peroxide and the ... 
      Carmona, Danilo J.; Contreras, David R.; Douglas-Gallardo, Oscar A.; Vogt-Geisse, Stefan; Jaque, Pablo; Vöhringer-Martinez, Esteban (Springer New York LLC, 2018)
      © 2018, Springer-Verlag GmbH Germany, part of Springer Nature. Hydroxyl radical reduction and peroxide bond breaking in hydrogen peroxide are reactions involved in various processes such as the Fenton reaction, which has ...
    • Gastroprotective activity of Parastrephia quadrangularis (Meyen), cabrera from the atacama desert 
      Ardiles, Alejandro; Barrientos, Ruth; Simirgiotis, Mario J.; Bórquez, Jorge; Sepúlveda, Beatriz; Areche, Carlos (MDPI AG, 2018)
      © 2018 MDPI AG. All rights reserved. Forty-three metabolites including several methoxylated flavonoids, tremetones, and ent-clerodane diterpenes were accurately identified for the first time in the ethanolic extract of P. ...
    • Disentangling demographic co-effects of predation and pollution on population dynamics 
      Reyes, Claudio A.; Ramos Jiliberto, Rodrigo; Arim, Matías; Lima, Mauricio (Blackwell, 2018)
      In nature species react to a variety of endogenous and exogenous ecological factors. Understanding the mechanisms by which these factors interact and drive population dynamics is a need for understanding and managing ...
    • “Shepherd’s crook” neurons drive and synchronize the enhancing and suppressive mechanisms of the midbrain ... 
      Garrido Charad, Florencia; Vega Zúñiga, Tomás; Gutiérrez Ibáñez, Cristián; Fernandez, Pedro; López-Jury, Luciana; González-Cabrera, Cristian; Karten, Harvey J.; Luksch, Harald; Marín, Gonzalo J. (National Academy of Sciences, 2018)
      © National Academy of Sciences. All rights reserved. The optic tectum (TeO), or superior colliculus, is a multisensory midbrain center that organizes spatially orienting responses to relevant stimuli. To define the stimulus ...
    • Thorson's rule, life-history evolution, and diversification of benthic octopuses (Cephalopoda: Octopodoidea) 
      Ibáñez, Christian M.; Rezende, Enrico; Sepúlveda, Roger D.; Avaria Llautureo, Jorge; Hernández, Cristián E.; Sellanes, Javier; Poulin, Elie; Pardo Gandarillas, María Cecilia (Society for the Study of Evolution, 2018)
      Here, we evaluate the so-called Thorson’s rule, which posits that direct-development and larger eggs are favored toward the poles in marine organisms and whose validity been the subject of considerable debate in the ...
    • Gating charge displacement in a monomeric voltage-gated proton (Hv1) channel 
      Carmona, Emerson M.; Peter Larsson, H.; Neely, Alan; Alvarez, Osvaldo; Latorre, Ramón; Gonzalez, Carlos (National Academy of Sciences, 2018)
      © 2018 National Academy of Sciences. All Rights Reserved. The voltage-gated proton (Hv1) channel, a voltage sensor and a conductive pore contained in one structural module, plays important roles in many physiological ...