• Application of eco-design and life cycle assessment standards for environmental impact reduction of an industrial product 

      Navajas León, Alberto Upna Orcid; Uriarte Elizaga, Leire; Gandía Pascual, Luis Upna Orcid (MDPI, 2017)   Artículo / Artikulua  OpenAccess
      Eco-design is included within the framework of the standard for “Environmental management systems—Guidelines for incorporating Eco-design” (ISO 14006:2011). Eco-design process, as defined in standard, has six steps: (i) ...
    • Application of gold complexes in the development of sensors for volatile organic compounds 

      Luquin, Asunción Upna Orcid; Elosúa Aguado, César Upna Orcid; Vergara, Elena; Estella, Juncal Upna; Cerrada, Elena; Bariáin Aisa, Cándido Upna Orcid; Matías Maestro, Ignacio Upna Orcid; Garrido Segovia, Julián José Upna Orcid; Laguna, Mariano (World Gold Council, 2007)   Artículo / Artikulua  OpenAccess
      Two different kinds of sensors have been developed by using the same kind of vapochromic complexes. The vapochromic materials [Au2Ag2(C6F5)(4)L-2](n) have different colours depending on the ligand L. These materials change, ...
    • Asymmetric assembly of all‐carbon tertiary/quaternary nonadjacent stereocenters through organocatalytic conjugate addition of α‐cyanoacetates to a methacrylate equivalent 

      Iriarte, Igor; Vera, Silvia; Badiola, Eider; Mielgo, Antonia; Oiarbide, Mikel; García Castillo, Jesús María Upna Orcid; Odriozola Ibarguren, José Manuel Upna Orcid; Palomo, Claudio (Wiley, 2016)   Artículo / Artikulua  OpenAccess
      An efficient, highly diastereo- and enantioselective assembly of acyclic carbonyl fragments possessing nonadjacent all-carbon tertiary/quaternary stereoarrays is reported based on a Brønsted base catalyzed Michael ...
    • Asymmetric propionate aldol reactions of a chiral lithium enolate accessible from direct enolization with n-butyllithium 

      Palomo, Claudio; Oiarbide, Mikel; Gómez Bengoa, Enrique; Mielgo, Antonia; González Rego, María Concepción Upna; García Castillo, Jesús María Upna Orcid; González Guerrero, Alberto Upna; Odriozola Ibarguren, José Manuel Upna Orcid; Bañuelos, Patricia Upna; Linden, Anthony (ARKAT USA, Inc., 2005)   Artículo / Artikulua  OpenAccess
      The presented lithium enolate-based methodology is suitable for access to propionate syn-aldol motifs with high levels of stereocontrol. The reactive lithium enolate species is generated by direct treatment of a camphor-based ...
    • Bioavailability of heavy metals in soils amended with sewage sludge 

      Morera Luzán, María Teresa Upna; Echeverría Morrás, Jesús Upna Orcid; Garrido Segovia, Julián José Upna Orcid (Agricultural Institute of Canada, 2002)   Artículo / Artikulua  OpenAccess
      The recycling of sewage sludge to agricultural land results in the slow accumulation of potentially toxic heavy metals in soils. A greenhouse experiment was conducted to determine the bioavailability of Cu, Ni, Pb and ...
    • Catalytic hydroprocessing of lignin β-O-4 ether bond model compound phenethyl phenyl ether over ruthenium catalysts 

      Gómez Monedero, B.; Faria, J.; Bimbela Serrano, Fernando Upna Orcid; Ruiz, M. P. (Springer, 2017)   Artículo / Artikulua  OpenAccess
      The catalytic hydroprocessing of phenethyl phenyl ether (PPE), a model compound of one of the most significant ether linkages within lignin structure, β-O-4, has been studied. Reactions were carried out using two ruthenium-based ...
    • Encuesta de satisfacción de un proyecto de mejora de calidad del servicio aragonés de salud 

      Bimbela Serrano, María Teresa; Bimbela Serrano, Fernando Upna Orcid; Bernués Vázquez, Luis (Universidad de Murcia, 2015)   Artículo / Artikulua  OpenAccess
      Introducción: Según el informe de 2008 del Sistema Nacional de Salud, existe un 4,7% de los usuarios que opina que el sistema sanitario debería rehacerse por completo y casi un 27%, que es necesario introducir cambios ...
    • Estrategias del alumnado de Educación Secundaria para estimar la densidad 

      Napal Fraile, María Upna Orcid; Echeverría Morrás, Jesús Upna Orcid; Zulet González, Amaia Upna; Santos Cervera, Leyre; Ibarra Murillo, Julia Upna Orcid (Universitat Autònoma de BarcelonaUniversitat de València, 2018)   Artículo / Artikulua  OpenAccess
      La densidad, o concentración de materia, es un concepto muy relevante pero que genera muchas dificultades de comprensión. Para medir la competencia en la estimación de la densidad del alumnado de la ESO, se pasó un ...
    • Fiber optic sensors based on hybrid phenyl-silica xerogel films to detect n-hexane: determination of the isosteric enthalpy of adsorption 

      Echeverría Morrás, Jesús Upna Orcid; Calleja, Ignacio; Moriones Jiménez, Paula Upna Orcid; Garrido Segovia, Julián José Upna Orcid (Beilstein-Institut, 2017)   Artículo / Artikulua  OpenAccess
      We investigated the response of three fiber optic sensing elements prepared at pH 10 from phenyltriethoxysilane (PhTEOS) and tetraethylsilane (TEOS) mixtures with 30, 40, and 50% PhTEOS in the silicon precursor mixture. ...
    • Gold supported on CuOₓ/CeO₂ catalyst for the purification of hydrogen by the CO preferential oxidation reaction (PROX) 

      Laguna, O. H.; Hernández, W. Y.; Arzamendi Manterola, María Cruz Upna Orcid; Gandía Pascual, Luis Upna Orcid; Centeno, M. A. (Elsevier, 2014)   Artículo / Artikulua  OpenAccess
      Hydrogen produced from the conversion of hydrocarbons or alcohols contains variable amounts of CO that should be removed for some applications such as feeding low-temperature polymer electrolyte membrane fuel cells (PEMFCs). ...
    • Hydrogen production from water electrolysis: current status and future trends 

      Ursúa Rubio, Alfredo Upna Orcid; Gandía Pascual, Luis Upna Orcid; Sanchis Gúrpide, Pablo Upna Orcid (IEEE, 2012)   Artículo / Artikulua  OpenAccess
      This paper reviews water electrolysis technologies for hydrogen production and also surveys the state of the art of water electrolysis integration with renewable energies. First, attention is paid to the thermodynamic and ...
    • Influence of the power supply on the energy efficiency of an alkaline water electrolyser 

      Ursúa Rubio, Alfredo Upna Orcid; Marroyo Palomo, Luis Upna Orcid; Gubía Villabona, Eugenio Upna Orcid; Gandía Pascual, Luis Upna Orcid; Diéguez Elizondo, Pedro Upna Orcid; Sanchis Gúrpide, Pablo Upna Orcid (Elsevier, 2009)   Artículo / Artikulua  OpenAccess
      Electric energy consumption represents the greatest part of the cost of the hydrogen produced by water electrolysis. An effort is being carried out to reduce this electric consumption and improve the global efficiency ...
    • Kinetic analysis and CFD simulations of the photocatalytic production of hydrogen in silicone microreactors from water-ethanol mixtures 

      Castedo, Alejandra; Uriz Doray, Irantzu Upna Orcid; Soler, Lluís; Gandía Pascual, Luis Upna Orcid; Llorca Piqué, Jordi (Elsevier, 2017)   Artículo / Artikulua  OpenAccess
      Silicone microreactors containing microchannels of 500 μm width in a single or triple stack configuration have been manufactured, coated with an Au/TiO2 photocatalyst and tested for the photocatalytic production of hydrogen ...
    • Kinetics of the acid-catalyzed hydrolysis of tetraethoxysilane (TEOS) by 29Si NMR spectroscopy and mathematical modeling 

      Echeverría Morrás, Jesús Upna Orcid; Moriones Jiménez, Paula Upna Orcid; Arzamendi Manterola, María Cruz Upna Orcid; Garrido Segovia, Julián José Upna Orcid; Gil Idoate, María José Upna Orcid; Cornejo Ibergallartu, Alfonso Upna Orcid; Martínez Merino, Víctor Upna Orcid (Springer, 2018)   Artículo / Artikulua  OpenAccess
      Tetraethoxysilane (TEOS) is widely used to synthesize siliceous material by the sol–gel process. However, there is still some disagreement about the nature of the limiting step in the hydrolysis and condensation reactions. ...
    • Lipogenic enzyme activity in growing Rasa Aragonesa lambs 

      Arana Navarro, Ana Upna Orcid; Soret Lafraya, Beatriz Upna Orcid; Corroza Muro, Manuel Upna; Mendizábal Aizpuru, José Antonio Upna Orcid; Mendizábal Múgica, Francisco Javier Upna; Horcada, Alberto; Eguinoa Ancho, Paola Upna; Purroy Unanua, Antonio Upna (CIHEAM, 1995)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      The lipogenic enzyme activity of the following enzymes was studied: Glycerol 3-phosphate dehydrogenase (G3PDH), fatty acids synthetase (FAS), NADP-Malate dehydrogenase (ME) and Glucose 6-phosphate dehydrogenase (G6PDH) ...
    • Microwave-assisted pillaring of a montmorillonite with al-polycations in concentrated media 

      González, Beatriz; Pérez, Alba Helena; Trujillano, Raquel; Gil Bravo, Antonio Upna Orcid; Vicente, Miguel Ángel (MDPI, 2017)   Artículo / Artikulua  OpenAccess
      A montmorillonite has been intercalated with Al3+ polycations, using concentrated solutions and clay mineral dispersions. The reaction has been assisted by microwave radiation, yielding new intercalated solids and leading ...
    • Mobility of heavy metals in soils amended with sewage sludge 

      Morera Luzán, María Teresa Upna; Echeverría Morrás, Jesús Upna Orcid; Garrido Segovia, Julián José Upna Orcid (Agricultural Institute of Canada, 2001)   Artículo / Artikulua  OpenAccess
      Sewage sludges added to arable land can improve soil fertility and physical properties. However, the concentrations of heavy metals commonly found in sludges limits their application to soil. The purpose of this paper is ...
    • Navarra y China. Punto de partida 

      Sánchez Fernández, Carlos Upna (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2006)   Artículo / Artikulua  OpenAccess
      Es cierto, y no nos equivocamos al decir que China es diferente. Esta diferencia hace que insistamos una y otra vez en que China es, si no el lugar más difícil para hacer negocios, sí uno de los más difíciles. Pero, a ...
    • Outstanding performance of rehydrated Mg-Al hydrotalcites as heterogeneous methanolysis catalysts for the synthesis of biodiesel 

      Navajas León, Alberto Upna Orcid; Campo Aranguren, Idoia; Moral Larrasoaña, Ainara Upna; Echave, Javier; Sanz, Oihane; Montes, Mario; Odriozola, José Antonio; Arzamendi Manterola, María Cruz Upna Orcid; Gandía Pascual, Luis Upna Orcid (Elsevier, 2018)   Artículo / Artikulua  OpenAccess
      There is still a need for active, selective and stable heterogeneous catalysts for the synthesis of biodiesel. In this work, magnesium-aluminium hydrotalcites with Mg/Al molar ratios within the 1.5–5 range were synthesized ...
    • Preparation of Al/Fe-pillared clays: effect of the starting mineral 

      Muñoz Alvear, Helir Joseph; Blanco, Carolina; Gil Bravo, Antonio Upna Orcid; Vicente, Miguel Ángel; Galeano, Luis Alejandro (MDPI, 2017)   Artículo / Artikulua  OpenAccess
      Four natural clays were modified with mixed polyoxocations of Al/Fe for evaluating the effect of the physicochemical properties of the starting materials (chemical composition, abundance of expandable clay phases, cationic ...

      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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