Now showing items 1-20 of 375

    • Association of intrinsic capacity with respiratory disease mortality 

      Ramírez Vélez, Robinson; Iriarte-Fernández, María; Santafé Rodrigo, Guzmán Upna Orcid; Malanda Trigueros, Armando Upna Orcid; Beard, John R.; García Hermoso, Antonio; Izquierdo Redín, Mikel (Elsevier, 2023)   Artículo / Artikulua
      The World Health Organization (WHO) introduced a framework for healthy aging in 2015 that emphasizes functional ability instead of absence of disease. Healthy ageing is defined as “the process of building and maintaining ...
    • Achieving transfer from mathematics learning 

      Orón, José Víctor; Lizasoain Iriso, María Inmaculada Upna Orcid (MDPI, 2023)   Artículo / Artikulua  OpenAccess
      The question of transfer is a special challenge in mathematics teaching because the wide range and fragmentation of the curricula have in many cases fostered an instrumental understanding, which makes transfer difficult ...
    • The Southwestern Europe Meteor Network: notable meteors spotted between December 2022 and January 2023 

      Madiedo, J. M.; Ortiz, J. L.; Izquierdo, J.; Santos-Sanz, P.; Aceituno, J.; Guindos, E. de; Yanguas Sayas, Patricia Upna Orcid; Palacián Subiela, Jesús Francisco Upna Orcid; San Segundo, A.; Ávila, D.; Tosar, B.; Gómez-Hernández, A.; Gómez-Martínez, Juan; García, Antonio; Aimee, A. I. (MeteorNews, 2023)   Artículo / Artikulua  OpenAccess
      We present in this report the analysis of some of the notable meteors registered in the framework of the Southwestern Europe Meteor Network between December 2022 and January 2023. These were recorded from Spain. Their peak ...
    • Synthesis strategies of alumina from aluminum saline slags 

      Grande López, Lucía Upna; Vicente, Miguel Ángel; Korili, Sophia A. Upna Orcid; Gil Bravo, Antonio Upna Orcid (Elsevier, 2023)   Artículo / Artikulua  OpenAccess
      Aluminum saline slags is a waste of the metallurgical industry that presents serious environmental problems since it needs very extensive areas for its disposal, the toxicity it causes in the atmosphere and groundwater, ...
    • Gaseous fueling of an adapted commercial automotive spark-ignition engine: simplified thermodynamic modeling and experimental study running on hydrogen, methane, carbon monoxide and their mixtures 

      Urroz Unzueta, José Carlos Upna Orcid; Diéguez Elizondo, Pedro Upna Orcid; Arzamendi Manterola, María Cruz Upna Orcid; Arana Burgui, Miguel Upna Orcid; Gandía Pascual, Luis Upna Orcid (Elsevier, 2023)   Artículo / Artikulua  OpenAccess
      In the present work, methane, carbon monoxide, hydrogen and the binary mixtures 20 % CH4–80 % H2, 80 % CH4–20 % H2, 25 % CO–75 % H2 (by volume) were considered as fuels of a naturally aspirated port-fuel injection four-cylinder ...
    • Analysis of bright bolides recorded between October and November 2022 by the Southwestern Europe Meteor Network 

      Madiedo, J. M.; Ortiz, J. L.; Izquierdo, J.; Santos-Sanz, P.; Aceituno, J.; Guindos, E. de; Yanguas Sayas, Patricia Upna Orcid; Palacián Subiela, Jesús Francisco Upna Orcid; San Segundo, A.; Ávila, D.; Tosar, B.; Gómez-Hernández, A.; Gómez-Martínez, Juan; García, Antonio; Aimee, A. I. (MeteorNews, 2023)   Artículo / Artikulua  OpenAccess
      We present in this work the analysis of some of the bright fireballs spotted in the framework of the Southwestern Europe Meteor Network (SWEMN) between October and November 2022. They have been observed from the Iberian ...
    • Magnetic carbon Fe3O4 nanocomposites synthesized via magnetic induction heating 

      Cervera Gabalda, Laura María Upna; Gómez Polo, Cristina Upna Orcid (Springer Nature, 2023)   Artículo / Artikulua  OpenAccess
      Magnetic Induction Heating (MIH) of magnetite nanoparticles is employed as a novel synthesis procedure of carbon based magnetic nanocomposites. Magnetic nanoparticles (Fe3O4) and fructose (1:2 weight ratio) were mechanically ...
    • Development of an α′-hydroxy enone for the aminocatalytic asymmetric formal conjugate addition of aldehydes to acrylates, vinyl ketones and acrolein 

      Odriozola Ibarguren, José Manuel Upna Orcid; Razkin Lizarraga, Jesús; Lorea Revilla, Beñat; Mielgo, Antonia; García Castillo, Jesús María Upna Orcid; Oiarbide, Mikel; Palomo, Claudio (Royal Society of Chemistry, 2023)   Artículo / Artikulua
      Aminocatalytic asymmetric conjugate addition of aldehydes to Michael acceptors is a well established C-C bond forming methodology. However, various acrylic-type acceptors, including acrylic acid derivatives and acrolein, ...
    • Antioxidant properties of bioactive compounds in fruit and vegetable waste 

      Jiménez Moreno, Nerea Upna Orcid; Esparza Catalán, Irene Upna; Ancín Azpilicueta, Carmen Upna Orcid (MDPI, 2023)   Artículo / Artikulua  OpenAccess
      In recent years, great interest has arisen in the study of compounds with antioxidant activity present in agri-food residues. The growing demand from consumers for antioxidants of natural origin, the continuous growth ...
    • Non-linear GMI decoding in 3D printed magnetic encoded systems 

      Beato López, Juan Jesús Upna Orcid; Algueta-Miguel, Jose M. Upna Orcid; Galarreta Rodríguez, Itziar; Garayo Urabayen, Eneko Upna Orcid; López Ortega, Alberto Upna Orcid; Gómez Polo, Cristina Upna Orcid; Pérez de Landazábal Berganzo, José Ignacio Upna Orcid (Elsevier, 2023)   Artículo / Artikulua  OpenAccess
      The nonlinear giant magnetoimpedance (GMI) effect was explored as a highly sensitive sensing technology in 3D-printed magnetic encoded systems. Magnetic nanoparticles with low (magnetite, Fe3O4) and high (Co ferrite, ...
    • CASPT2 study of the electronic structure and photochemistry of protonated N-nitrosodimethylamine (NDMA-H+) at 453 nm 

      Soto, Juan; Peláez, Daniel; Algarra González, Manuel (American Institute of Physics, 2023)   Artículo / Artikulua  OpenAccess
      In this work, we have studied the photodissociation of the protonated derivatives of N-nitrosodimethylamine [(CH3)2N–NO] with the CASPT2 method. It is found that only one of the four possible protonated species of the ...
    • CO2 methanation over nickel catalysts: support effects investigated through specific activity and operando IR spectroscopy measurement 

      González Rangulan, Vigni Virginia; Reyero Zaragoza, Inés Upna Orcid; Bimbela Serrano, Fernando Upna Orcid; Romero Sarria, Francisca; Daturi, Marco; Gandía Pascual, Luis Upna Orcid (MDPI, 2023)   Artículo / Artikulua  OpenAccess
      Renewed interest in CO2 methanation is due to its role within the framework of the Power-to-Methane processes. While the use of nickel-based catalysts for CO2 methanation is well stablished, the support is being subjected ...
    • A comparative study in the design of TIO2 assisted photocatalytic coatings monitored by controlling hydrophilic behavior and rhodamine b degradation 

      Sandúa Fernández, Xabier; Rivero Fuente, Pedro J. Upna Orcid; Conde, Ana; Esparza Gorráiz, Joseba; Rodríguez Trías, Rafael Upna Orcid (MDPI, 2023)   Artículo / Artikulua  OpenAccess
      This work presents a comparative study related to the photocatalytic efficiency associated with wettability measurements and organic dye degradation, as well as other relevant properties (i.e., corrosion resistance, ...
    • Monitoring oocyte-based human pluripotency acquisition using synchrotron-based FTIR microspectroscopy reveals specific biomolecular trajectories 

      Dučić, Tanja; Sánchez-Mata, Alicia; Castillo-Sánchez, Jesús; Algarra González, Manuel; González-Muñoz, Elena (Elsevier, 2023)   Artículo / Artikulua  OpenAccess
      The reprogramming of human somatic cells to induced pluripotent cells (iPSCs) has become a milestone and a paradigm shift in the field of regenerative medicine and human disease modeling including drug testing and genome ...
    • Analysis by temperature-programmed reduction of the catalytic system Ni-Mo-Pd/Al2O3 

      Pedroarena Apezteguía, Iván Upna Orcid; Grande López, Lucía Upna; Torrez Herrera, Jonathan Josué Upna; Korili, Sophia A. Upna Orcid; Gil Bravo, Antonio Upna Orcid (Elsevier, 2023)   Artículo / Artikulua  OpenAccess
      Alumina-supported nickel catalysts are used to facilitate many reactions at various scales. However, the deactivation of these catalysts is an important problem that has prompted the search for solutions such as the ...
    • Study of effect of nickel content on tribocorrosion behaviour of nickel-aluminium-bronzes (NABs) 

      Berlanga Labari, Carlos Upna Orcid; Claver Alba, Adrián Upna Orcid; Biezma Moraleda, María Victoria; Palacio, José F. (MDPI, 2023)   Artículo / Artikulua  OpenAccess
      The simultaneous existence of mechanical erosion and electrochemical corrosion is a common scenario for engineering alloys used in marine environments, such as pump impellers and valves. Nickel–aluminium–bronzes (NABs) are ...
    • Graphene oxide: key to efficient charge extraction and suppression of polaronic transport in hybrids with poly (3-hexylthiophene) nanoparticles 

      Colom, Eduardo; Hernández-Ferrer, Javier; Galán-González, Alejandro; Ansón-Casaos, Alejandro; Navarro-Rodríguez, Mario; Palacios-Lidón, Elisa; Colchero, Jaime; Padilla, Javier; Urbina Yeregui, Antonio; Arenal, Raúl; Benito, Ana M.; Maser, Wolfgang K. (American Chemical Society, 2023)   Artículo / Artikulua  OpenAccess
      Nanoparticles (NPs) of conjugated polymers in intimate contact with sheets of graphene oxide (GO) constitute a promising class of water-dispersible nanohybrid materials of increased interest for the design of sustainable ...
    • Uniform convergent expansions of the error function in terms of elementary functions 

      Ferreira González, Chelo Upna; López García, José Luis Upna Orcid; Pérez Sinusía, Ester Upna Orcid (Springer, 2023)   Artículo / Artikulua  OpenAccess
      We derive a new analytic representation of the error function erfz in the form of a convergent series whose terms are exponential and rational functions. The expansion holds uniformly in z in the double sector | arg (±z) ...
    • One-pot synthesis of green-emitting nitrogen-doped carbon dots from xylose 

      Rodríguez-Carballo, Gabriela; García-Sancho, Cristina; Algarra González, Manuel; Castro, Eulogio; Moreno-Tost, Ramón (MDPI, 2023)   Artículo / Artikulua  OpenAccess
      Carbon dots (CDs) are interesting carbon nanomaterials that exhibit great photoluminescent features, low cytotoxicity, and excellent water stability and solubility. For these reasons, many fields are starting to integrate ...
    • Elucidating individual magnetic contributions in bi-magnetic Fe3O4/Mn3O4 Core/Shell nanoparticles by polarized powder neutron diffraction 

      Golosovsky, Igor V.; Kibalin, Iurii A.; Gukasov, Arsen; Gómez Roca, Alejando; López Ortega, Alberto Upna Orcid; Estrader, Marta; Vasilakaki, Marianna; Trohidou, Kalliopi; Hansen, T. C.; Puente-Orench, I.; Lelièvre-Berna, E.; Nogués, Josep (Wiley, 2023)   Artículo / Artikulua  OpenAccess
      Heterogeneous bi-magnetic nanostructured systems have had a sustained interest during the last decades owing to their unique magnetic properties and the wide range of derived potential applications. However, elucidating ...

      El Repositorio ha recibido la ayuda de la Fundación Española para la Ciencia y la Tecnología para la realización de actividades en el ámbito del fomento de la investigación científica de excelencia, en la Línea 2. Repositorios institucionales (convocatoria 2020-2021).
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