Envíos recientes

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

    Navajas León, Alberto; Uriarte Elizaga, Leire; Gandía Pascual, Luis (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) ...
  • Rosa canina extracts have antiproliferative and antioxidant effects on caco-2 human colon cancer 

    Jiménez Alonso, Sandra; Gascón, Sonia; Luquin, Asunción Upna; Laguna, Mariano; Ancín Azpilicueta, Carmen Upna; Rodríguez Yoldi, María Jesús (Public Library of Science, 2016)   Artículo / Artikulua  OpenAccess
    The in vitro antiproliferative and antioxidant effects of different fractions of Rosa canina hips on human colon cancer cell lines (Caco-2) was studied. The compounds tested were total extract (fraction 1), vitamin C ...
  • Preparation of Al/Fe-pillared clays: effect of the starting mineral 

    Muñoz, Helir Joseph; Blanco, Carolina; Gil Bravo, Antonio Upna; Vicente, Miguel A.; 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 ...
  • 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; Calleja, Ignacio; Moriones Jiménez, Paula Upna; Garrido Segovia, Julián José Upna (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. ...
  • Estrategias del alumnado de Educación Secundaria para estimar la densidad 

    Napal Fraile, María Upna; Echeverría Morrás, Jesús Upna; Zulet González, Amaia Upna; Santos Cervera, Leyre; Ibarra Murillo, Julia Upna (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 ...
  • Therapeutic applications of rose hips from different rosa species 

    Mármol, Inés; Sánchez de Diego, Cristina; Jiménez Moreno, Nerea Upna; Ancín Azpilicueta, Carmen Upna; Rodríguez Yoldi, María Jesús (MDPI, 2017)   Artículo / Artikulua  OpenAccess
    Rosa species, rose hips, are widespread wild plants that have been traditionally used as medicinal compounds for the treatment of a wide variety of diseases. The therapeutic potential of these plants is based on its ...
  • Microwave-assisted pillaring of a montmorillonite with al-polycations in concentrated media 

    González, Beatriz; Pérez, Alba Helena; Trujillano, Raquel; Gil Bravo, Antonio Upna; Vicente, Miguel A. (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 ...
  • 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; González Guerrero, Alberto Upna; Odriozola Ibarguren, José Manuel Upna; 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; Garrido Segovia, Julián José Upna (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 ...
  • Application of gold complexes in the development of sensors for volatile organic compounds 

    Luquin, Asunción Upna; Elosúa Aguado, César Upna; Vergara, Elena; Estella, Juncal Upna; Cerrada, Elena; Bariáin Aisa, Cándido Upna; Matías Maestro, Ignacio Upna; Garrido Segovia, Julián José Upna; 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, ...
  • Mobility of heavy metals in soils amended with sewage sludge 

    Morera Luzán, María Teresa Upna; Echeverría Morrás, Jesús Upna; Garrido Segovia, Julián José Upna (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 ...