Now showing items 1-20 of 23

    • ENSO and NAO affect long-term leaf litter dynamics and stoichiometry of Scots pine and European beech mixedwoods 

      González de Andrés, Ester Upna; Blanco Vaca, Juan Antonio Upna; Imbert Rodríguez, Bosco Upna; Guan, Biing T.; Lo, Yueh-Hsin Upna; Castillo Martínez, Federico Upna (Wiley, 2019)   Artículo / Artikulua
      Litterfall dynamics (production, seasonality and nutrient composition) are key factors influencing nutrient cycling. Leaf litter characteristics are modified by species composition, site conditions and water availability. ...
    • Suitability of Totora (Schoenoplectus californicus (C.A. Mey.) Soják) for its use in constructed wetlands in areas polluted with heavy metals 

      Blanco Vaca, Juan Antonio Upna (MDPI, 2019)   Artículo / Artikulua  OpenAccess
      Schoenoplectus californicus subsp. tatora (totora) is an endemic plant from wetlands in South America´s Altiplano region. In the endorheic Titicaca-Desaguadero-Poopó-Salar de Coipasa system (TDPS), totora can be found along ...
    • Application of anti-transpirants temporarily alleviates the inhibition of symbiotic nitrogen fixation in drought-stressed pea plants 

      Aldasoro Galán, Joseba Upna; Larrainzar Rodríguez, Estíbaliz Upna; Arrese-Igor Sánchez, César Upna (Elsevier, 2019)   Artículo / Artikulua  OpenAccess
      Stomatal closure is one of the first plant responses under a water deficit situation. This leads to a decline in transpiration but also in the plant photosynthetic activity. Legume plants grown under symbiosis with rhizobium ...
    • Biodiesel production from heterogeneous catalysts based K2CO3 supported on extruded Γ-Al2O3 

      Silveira Junior, Euripedes Garcia; Perez, Victor Haber; Reyero Zaragoza, Inés Upna; Serrano Lotina, Ana; Justo, Oselys Rodriguez (Elsevier, 2019)   Artículo / Artikulua
      Catalytic biodiesel production from sunflower oil and ethanol using K2CO3/γ-Al2O3 in different configurations has been studied. To prepare the catalysts, boehmite was extruded with the aid of a binder and different percentages ...
    • IAOx induces the SUR phenotype and differential signalling from IAA under different types of nitrogen nutrition in Medicago truncatula roots 

      Buezo Bravo, Javier; Esteban Terradillos, Raquel; Cornejo Ibergallartu, Alfonso; López Gómez, Pedro; Marino Bilbao, Daniel Upna; Chamizo Ampudia, Alejandro; Gil Idoate, María José; Martínez Merino, Víctor; Morán Juez, José Fernando Upna (Elsevier, 2019)   Artículo / Artikulua
      Indole-3-acetaldoxime (IAOx) is a particularly relevant molecule as an intermediate in the pathway for tryptophan-dependent auxin biosynthesis. The role of IAOx in growth-signalling and root phenotype is poorly studied in ...
    • Thrust actuator with passive restoration force for wide gap magnetic bearings 

      Royo, Isaac; Beato López, Juan Jesús; Castellano Aldave J. C.; Gómez Polo, Cristina (Elsevier, 2019)   Artículo / Artikulua
      Active thrust magnetic bearings provide an axial force to balance the moving parts of machines. However, most devices produce null or unbalancing passive forces. Furthermore, reported designs usually feature very small ...
    • Phenyl siloxane hybrid xerogels: structure and porous texture 

      Moriones Jiménez, Paula Upna; Echeverría Morrás, Jesús Upna; Parra, Bernardo; Garrido Segovia, Julián José Upna (Springer US, 2019)   Artículo / Artikulua
      The aim of this research is to investigate the effect of phenyltriethoxysilane (PhTEOS) and tetraethoxysilane (TEOS) molar ratios as silicon precursors on the structure and porous texture of xerogels. We have prepared ...
    • Identification of a Ni-vacancy defect in Ni-Mn-Z (Z = Ga, Sn, In): an experimental and DFT positron-annihilation study 

      Unzueta, Iraultza; Sánchez-Alarcos Gómez, Vicente Upna; Recarte, Vicente; Pérez-Landazábal, José Ignacio; Zabala, Nerea; García, José Angel; Plazaola, Fernando (American Physical Society, 2019)   Artículo / Artikulua  OpenAccess
      By means of experimental positron-annihilation-lifetime measurements and theoretical density functional theory (DFT) positron-lifetime calculations, vacancy-type defects in Ni50Mn50−xSnx (x = 25, 20, 15, 13, 10) and ...
    • The proteome of Medicago truncatula in response to ammonium and urea nutrition reveals the role of membrane proteins and enzymes of root lignification 

      Royo Castillejo, Beatriz; Esteban Terradillos, Raquel; Buezo Bravo, Javier; Santamaría, Enrique; Fernández Irigoyen, Joaquín; Becker, Dirk; Morán Juez, José Fernando Upna (Elsevier, 2019)   Artículo / Artikulua
      Plants differ widely in their growth and tolerance responses to ammonium and urea nutrition, while derived phenotypes seem markedly different from plants grown under nitrate supply. Plant responses to N sources are complex, ...
    • Experimental Stark widths and shifts of MnII spectral lines 

      Manrique Rosel, Javier; Aragón Garbizu, Carlos Upna; Aguilera Andoaga, José Antonio Upna (Oxford University Press, 2019)   Artículo / Artikulua  OpenAccess
      Stark widths and shifts of MnII lines with wavelengths in the range 2300-3500 Å have been measured by laser-induced breakdown spectroscopy. The use of fused glass samples with varying Mn concentrations has allowed minimization ...
    • Influence of porosity on the elastic modulus of Ti-Zr-Ta-Nb foams with a low Nb content 

      Aguilar, Claudio; Arancibia, Mariette; Alfonso, Ismeli; Sancy, Mamie; Tello, Karem; Salinas, Vicente; Cuevas Jiménez, Fernando de las (MDPI, 2019)   Artículo / Artikulua  OpenAccess
      The development of titanium foams with a low elastic modulus has increased their scientific and technological relevance due to the evident need to avoid stress shielding problems. In this work, we studied the synthesis and ...
    • Effect of stoniness on the hydraulic properties of a soil from an evaporation experiment using the wind and inverse estimation methods 

      Arias Fariñas, Nerea Upna; Virto Quecedo, Íñigo Upna; Enrique Martín, Alberto Upna; Bescansa Miquel, Paloma Upna; Walton, Riley; Wendroth, Ole (MDPI, 2019)   Artículo / Artikulua  OpenAccess
      Stony soils are distributed all over the world. The study of their characteristics has gained importance lately due to their increasing use as agricultural soils. The effect that rock fragments exert on the soil hydraulic ...
    • Modification of the Thomas model for predicting unsymmetrical breakthrough curves using an adaptive neural-based fuzzy inference system 

      Amiri, Mohammad Javad; Khozaei, Maryam; Gil Bravo, Antonio Upna (IWA Publishing, 2019)   Artículo / Artikulua  OpenAccess
      The Thomas equation is a popular model that has been widely used to predict breakthrough curves (BTCs) when describing the dynamic adsorption of different pollutants in a fixed-bed column system. However, BTCs commonly ...
    • Unpacking scientific competence for effective integration in the curriculum design 

      Napal Fraile, María Upna; Mendioroz Lacambra, Ana Upna; Peñalva Vélez, Alicia Upna (2019)   Artículo / Artikulua  OpenAccess
      Educating for Sustainability involves promoting sustainable competences in students. Not in vain, wider societal changes that ensure a balance between economic growth, respect for the environment and social justice must ...
    • Hábitos de uso de Internet en niños y niñas de 8 a 12 años: un estudio descriptivo 

      Peñalva Vélez, Alicia Upna; Napal Fraile, María Upna (Universidad Alas Peruanas, 2019)   Artículo / Artikulua  OpenAccess
      La irrupción de la Web 2.0 ha supuesto la aparición de nuevas formas de producir, distribuir, intercambiar y recibir información a través de medios electrónicos. En este contexto, es necesario alfabetizar a la población ...
    • Development of the digital competence in Secondary Education teachers' training 

      Napal Fraile, María Upna; Peñalva Vélez, Alicia Upna; Mendioroz Lacambra, Ana Upna (MDPI, 2018)   Artículo / Artikulua  OpenAccess
      Digital competence is one of the 8 key competences for life-long learning developed by the European Commission, and is requisite for personal fulfilment and development, active citizenship, social inclusion and employment ...
    • Tailoring the structural and magnetic properties of Co-Zn nanosized ferrites for hyperthermia applications 

      Gómez Polo, Cristina; Recarte Callado, Vicente Upna; Cervera Gabalda, Laura María; Beato López, Juan Jesús; López García, Javier; Rodríguez Velamazán, José Alberto; Ugarte Martínez, María Dolores Upna; Mendonça, E. C.; Duque, J. G. S. (Elsevier, 2018)   Artículo / Artikulua
      A comparative study of the magnetic properties (magnetic moment, magnetocrystalline anisotropy) and hyperthermia response in Co-Zn spinel nanoparticles is presented. The CoxZn1-xFe2O4 nanoparticles (x = 1, 0.5, 0.4, 0.3, ...
    • Extruded catalysts with magnetic properties for biodiesel production 

      Silveira Junior, Euripedes Garcia; Justo, Oselys Rodriguez; Perez, Victor Haber; Reyero Zaragoza, Inés Upna; Serrano Lotina, Ana; Campos Ramirez, Leonardo; Santos Dias, Dayana F. dos (Hindawi, 2018)   Artículo / Artikulua  OpenAccess
      The aim of this work was to evaluate the performance of different extruded catalysts containing K2CO3 as active phase and adding conveniently γ-Al2O3 and/or sepiolite and magnetic particles on the biodiesel production from ...
    • Micrometric non-contact position magnetoimpedance sensor 

      Beato López, Juan Jesús; Royo, Isaac; Gómez Polo, Cristina (Elsevier, 2018)   Artículo / Artikulua
      In this work a sensitive micrometric non-contact position sensor based on the Giant MagnetoImpedance effect (GMI) is analyzed. A nearly zero magnetostrictive CoFeSiBCr wire was employed as sensor nucleus. The sensing ...
    • Development of digital competence in secondary education teachers' training 

      Napal Fraile, María Upna; Peñalva Vélez, Alicia Upna; Mendioroz Lacambra, Ana Upna (MDPI, 2018)   Artículo / Artikulua  OpenAccess
      Digital competence is one of the eight key competences for life-long learning developed by the European Commission, and is a requisite for personal fulfilment and development, active citizenship, social inclusion, and ...