Mostrando ítems 261-280 de 1852

    • Nivel de actividad física y estrés académico percibido por estudiantes universitarios del área de salud durante el periodo de exámenes 

      Muñoz-Donoso, Diego [Univ Mayor, Chile]; Soto-Sánchez, Johana [Univ Mayor, Chile]; Leyton, Barbara; Carrasco-Beltrán, Hernaldo; Valdés-Cabezas, Eduardo [Univ Mayor, Chile] (FEDERACION ESPANOLA ASOC DOCENTES EDUCACION FISICA-FEADEF, 2023-05-24)
      Introducción: La práctica regular de actividad física (AF) es reconocida por su efecto en la salud. Durante, la formación universitaria, surge la sobrecarga académica. Los objetivos de este estudio son 1). Determinar las ...
    • Efectos de intervenciones sobre las habilidades motoras fundamentales y actividad física en preescolares: revisión sistemática 

      Fernández-Valero, Paz Belén; Soto-Sánchez, Johana [Univ Mayor, Chile]; Muñoz-Lara, Marcelo (FEDERACION ESPANOLA ASOC DOCENTES EDUCACION FISICA-FEADEF, 2023-03-11)
      Preescolares con mayor desarrollo de habilidades motoras fundamentales (HMF) se relaciona con mayor tiempo en actividad física (AF). Sin embargo, se sabe poco acerca de si la participación después de una intervención provoca ...
    • Aprendizaje basado en investigación para el fortalecimiento de la formación inicial docente en pedagogía en educación física 

      Poblete-Valderrama, Felipe; Garrido-Méndez, Alex; Matus Castillo, Carlos; Castro Cáceres, Ricardo; Toro- Salinas, Andrés; Cuevas Aburto, Jesualdo; Illanes Aguilar, Lucia [Univ Mayor, Chile]; Cenzano-Castillo, Lizette; Hetz Rodríguez, Katherine; Flores Rivera, Carol (FEDERACION ESPANOLA ASOC DOCENTES EDUCACION FISICA-FEADEF, 2023)
      La sistematización de la presente experiencia pedagógica explica la implementación de un programa piloto de Aprendizaje Basado en Investigación (ABI) en el proceso de Formación Inicial Docente (FID) del Profesorado de ...
    • Editorial: Impacts of climate change on long term viability of tree species with recalcitrant seeds 

      Brock, JMR.; Craven, Dylan [Univ Mayor, Ctr Modelac & Monitoreo Ecosistemas, Chile]; Morales, Narkis S. (FRONTIERS MEDIA SA, 2023-08-07)
      Sin resumen.
    • Suitability of band angle indices for burned area mapping in the Maule Region (Chile) 

      Oliva, Patricia [Univ Mayor, Escuela Ingn Forestal, Fac Ciencias Ingn & Tecnol, Hemera Ctr Observac Tierra, Chile]; Mansilla, Roxana [Univ Mayor, Escuela Ingn Forestal, Fac Ciencias Ingn & Tecnol, Magister Teledetecc, Chile]; Roteta, Ekhi; Pérez-Martínez, Waldo [Univ Mayor, Escuela Ingn Forestal, Fac Ciencias Ingn & Tecnol, Hemera Ctr Observac Tierra, Chile] (FRONTIERS MEDIA SA, 2023-01-04)
      In January 2017, 114 active fires burned throughout Chile at the same time. These fires spread quickly due to high temperatures, fast dry winds, and low vegetation water content. The fire events burned more than 570,000 ...
    • Occurrence, source estimation, and risk assessment of Polycyclic Aromatic Hydrocarbons in coastal seawaters from the Quintero Industrial Complex (Valparaiso, Chile) 

      Galbán-Malagón, CJ.; Zapata, J.; Pérez-Venegas, DJ.; Vargas, R.; Latorre-Padilla, N.; Luarte, T.; Ahrendt, C.; Hirmas-Olivares, A.; Gómez-Aburto, V.; Tapia, P.; Isamit, V.; Arce, P.; Sánchez, C. [Univ Mayor, Escuela Geol, Chile]; Pozo, K. (ELSEVIER, 2023-06-20)
      In the 1960s, the Quintero industrial complex was inaugurated in Chile. This began a history of dramatic anthropo-genic impacts on the Chilean coast. Among the known, we could mention high atmospheric emissions of chemicals ...
    • Climate variability of the southern Amazon inferred by a multi-proxy tree-ring approach using Cedrelafissilis Vell 

      Ortega Rodríguez, Daigard Ricardo; Sánchez-Salguero, Rail; Hevia, Andrea; Granato-Souza, Daniela; Cintra, Bruno B. L.; Hornink, Bruna; Andreu-Hayles, Laia; Assis-Pereira, Gabriel; Roig, Fidel A. [Univ Mayor, Escuela Ingn Forestal, Fac Ciencias, Hemera Ctr Observac Tierra, Chile]; Tomazello-Filho, Mario (ELSEVIER, 2023-02-01)
      The analysis of climate variability and development of reconstructions based on tree-ring records in tropical forests have been increasing in recent decades. In the Amazon region, ring width and stable isotope long-term ...
    • Spin-lattice-dynamics analysis of magnetic properties of iron under compression 

      dos Santos, Gonzalo; Meyer, Robert; Tramontina, Diego; Bringa, Eduardo M. [Univ Mayor, Fac Ciencias, Ctr Nanotecnol Aplicada, Chile]; Urbassek, Herbert M. (NATURE PORTFOLIO, 2023-08-31)
      Compression of a magnetic material leads to a change in its magnetic properties. We examine this effect using spin-lattice dynamics for the special case of bcc-Fe, using both single- and poly-crystalline Fe and a bicontinuous ...
    • Simulated nanoindentation into single-phase fcc FexNi1-x alloys predicts maximum hardness for equiatomic stoichiometry 

      Alabd Alhafez, Iyad; Deluigi, Orlando R.; Tramontina, Diego; Ruestes, Carlos J.; Bringa, Eduardo M. [Univ Mayor, Ctr Nanotecnol Aplicada, Chile]; Urbassek, Herbert M. (NATURE PORTFOLIO, 2023-06-16)
      We investigate by molecular dynamics simulation the mechanical behavior of concentrated alloys under nanoindentation for the special example of single-phase fcc FexNi1-x alloys. The indentation hardness is maximum for the ...
    • Influence of mobile genetic elements and insertion sequences in long- and short-term adaptive processes of Acidithiobacillus ferrooxidans strains 

      Moya-Beltrán, Ana; Gajdosik, Martin; Rojas-Villalobos, Camila; Beard, Simon; Mandl, Martin; Silva-García, Danitza [Univ Mayor, Fac Ciencias, Ctr Genom & Bioinformat, Chile]; Johnson, D. Barrie; Ramírez, Pablo; Quatrini, Raquel; Kucera, Jiri (NATURE PORTFOLIO, 2023-07-05)
      The recent revision of the Acidithiobacillia class using genomic taxonomy methods has shown that, in addition to the existence of previously unrecognized genera and species, some species of the class harbor levels of ...
    • Combined association of physical activity and sitting time with cardiometabolic risk factors in Chilean adults 

      Estrada-Saldaña, Esteban; Marques, Adilson; Silva, Danilo R.; Farías-Valenzuela, Claudio; Ferrero-Hernández, Paloma; Guzmán-Habinger, Juan [Univ Mayor, Sci Fac, Sports Med & Phys Act Specialty, Chile]; Rezende, LFM.; Ferrari, Gerson (NATURE PORTFOLIO, 2023-06-07)
      In this study we examined the combined association of physical activity and sitting time with cardiometabolic risk factors in adults in Chile. This is a cross-sectional study based on 3201 adults aged from 18 to 98 years ...
    • Imaging the subsurface architecture in porphyry copper deposits using local earthquake tomography 

      Comte, Diana; Palma, Gisella [Univ Mayor, Escuela Geol, Chile]; Vargas, Jimena; Calle-Gardella, Daniela; Peña, Matías [Univ Mayor, Escuela Geol, Chile]; García-Fierro, Sergio [Univ Mayor, Escuela Geol, Chile]; D'Andres, Joelle; Roecker, Steven; Pichott, Sergio (NATURE PORTFOLIO, 2023-04-26)
      An essential part of the world's remaining mineral resources is expected to reside deep in the crust or under post-mineralization cover. For porphyry copper deposits, the world's primary source of Cu, Mo, and Re, identifying ...
    • Machine learning modeling for the prediction of plastic properties in metallic glasses 

      Amigo, Nicolás; Palominos, Simón [Univ Mayor, Escuela Ingn Ind, Fac Ciencias Ingn & Tecnol, Chile]; Valencia, Felipe J. (NATURE PORTFOLIO, 2023-01-07)
      Metallic glasses are one of the most interesting mechanical materials studied in the last years, but as amorphous solids, they differ strongly from their crystalline counterparts. This matter can be addressed with the ...
    • Fast simultaneous electrochemical detection of Bisphenol-A and Bisphenol-S in urban wastewater using a graphene oxide-iron nanoparticles hybrid sensor 

      Piña, Samuel; Sepúlveda, Pamela [Univ Mayor, Fac Ciencias, Ctr Nanotecnol Aplicada CNAP, Chile]; García-García, Alejandra; Moreno-Bárcenas, Alejandra; Toledo-Neira, Carla; Salazar-González, Ricardo (PERGAMON-ELSEVIER SCIENCE LTD, 2023-11-10)
      In this work, a novel and sensitive electrochemical sensor was developed for the simultaneous determination of low concentration levels of Bisphenol-A (BPA) and Bisphenol-S (BPS) in a secondary effluent from a wastewater ...
    • Electrochemical fabrication of nanowires poly (Indole-6-carboxylic acid) adorned with nanorod MnO2 for evaluation of its capacitive properties 

      Lorca-Ponce, J. [Univ Mayor, Fac Ciencias Ingn & Tecnol, Ctr Nanotecnol Aplicada, Chile]; Cisterna, Jonathan; Cattin, Linda; Bernede, Jean-Christian; Louarn, G.; Ramírez, AMR. (PERGAMON-ELSEVIER SCIENCE LTD, 2023-10-01)
      A poly(indole-6-carboxy acid) nanowire composite with & beta;-MnO2 nanorod (6-PICA|& beta;-MnO2-NRs) was prepared by an electrochemical method and hydrothermal. The incorporation of & beta;-MnO2-NRs and the formation of ...
    • Pubertal development at age 14 is associated with male adolescents' combustible cigarette smoking and dual use, but not with e-cigarette use - Findings from the UK Millennium Cohort Study 

      Silva-Gallardo, Constanza P. [Univ Mayor, Soc & Hlth Res Ctr, Chile]; Maggs, Jennifer L. (ELSEVIER IRELAND LTD, 2023-12-01)
      Background: Adolescent nicotine exposure via electronic cigarettes (e-cigarettes) is a global health concern. Pubertal development earlier than peers increases the risk of tobacco smoking compared to peers experiencing ...
    • Does substance use disorder treatment completion reduce the risk of treatment readmission in Chile? 

      Ruiz-Tagle Maturana, José [Univ Mayor, Soc & Hlth Res Ctr, Fac Humanidades, Chile]; González-Santa Cruz, Andrés [Univ Mayor, Soc & Hlth Res Ctr, Sch Psychol, Fac Ciencias Sociales & Artes, Chile]; Rocha-Jiménez, Teresita [Univ Mayor, Soc & Hlth Res Ctr, Sch Psychol, Fac Ciencias Sociales & Artes, Chile]; Castillo-Carniglia, Alvaro [Univ Mayor, Soc & Hlth Res Ctr, Sch Psychol, Fac Ciencias Sociales & Artes, Chile] (ELSEVIER IRELAND LTD, 2023-07-01)
      Background: Recovery from substance use disorders (SUD) often entails multiple treatment episodes, which clashes with a context of a treatment system with limited resources and long waiting. Treatment retention and completion ...
    • Probing radiation resistance in simulated metallic core-shell nanoparticles 

      Tramontina, DR.; Deluigi, OR.; Pinzón, R.; Rojas-Núñez, J.; Valencia, FJ.; Pasianot, RC.; Baltazar, SE.; Gonzalez, RI. [Univ Mayor Chile, Fac Ciencias, Ctr Nanotecnol Aplicada, Chile]; Bringa, EM. [Univ Mayor Chile, Fac Ciencias, Ctr Nanotecnol Aplicada, Chile] (ELSEVIER, 2023-08)
      We present molecular dynamics (MD) simulations of radiation damage in Fe nanoparticles (NP) and bimetallic FeCu core-shell nanoparticles (CSNP). The CSNP includes a perfect body-centered cubic (bcc) Fe core coated with a ...
    • Plastic behavior of a nanoporous high-entropy alloy under compression 

      Deluigi, O.; Amingo, N.; Valencia, FJ.; Aquistapace, F.; Tramontina, DR.; Gonzalez, RI. [Univ Mayor, Ctr Appl Nanotechnol, Chile]; Bringa, Eduardo M. [Univ Mayor, Ctr Appl Nanotechnol, Chile] (ELSEVIER, 2023-06-25)
      Nanoporous High-entropy alloys (HEA) have attracted increasing attention in recent years due to their remark-able mechanical properties and their capability as storage devices. However, chemical complexity involves ...
    • Genome sequencing reveals molecular subgroups in oral epithelial dysplasia 

      Márquez, Agustín; Mujica, Isidora; Jordán, Natalia; Báez, Pablo; Tarquinio, Sandra; Nunes, Jean; Adorno, Daniela; Martínez, Benjamín [Univ Mayor, Fac Dent, Santiago, Chile]; Morales-Pisón, Sebastián [Univ Mayor, Precis Oncol Ctr, Santiago, Chile]; Fernández-Remires, Ricardo [Univ Mayor, Fac Med & Heatlh Sci, Santiago, Chile] (SOCIEDADE BRASILEIRA DE PESQUISA ODONTOLOGICA, 2023-07-16)
      This study aimed to analyze the molecular characteristics of oral epithelial dysplasia (OED), highlighting the pathways and variants of genes that are frequently mutated in oral squamous cell carcinoma (OSCC) and other ...


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