Now showing items 1-20 of 191

    • A comparative study of acid and alkaline aluminum extraction valorization procedure for aluminum saline slags 

      Jiménez, Alejandro; Rives, Vicente Upna Orcid; Vicente, Miguel A.; Gil Bravo, Antonio Upna Orcid (Elsevier, 2022)   Artículo / Artikulua  OpenAccess
      A management process for saline slags, one of the wastes from Secondary Aluminum Production, is proposed. The process begins with a grinding step, followed by washing with water, which removed the fluxing salts but provoking ...
    • Tryptophan levels as a marker of auxins and nitric oxide signaling 

      López Gómez, Pedro Upna Orcid; Smith, Edward N.; Bota, Pedro; Cornejo Ibergallartu, Alfonso Upna Orcid; Urra Rodríguez, Marina; Buezo Bravo, Javier Upna; Morán Juez, José Fernando Upna Orcid (MDPI, 2022)   Artículo / Artikulua  OpenAccess
      The aromatic amino acid tryptophan is the main precursor for indole-3-acetic acid (IAA), which involves various parallel routes in plants, with indole-3-acetaldoxime (IAOx) being one of the most common intermediates. ...
    • 25 years of continuous sewage sludge application vs. mineral fertilizers on a calcareous soil affected pH but not soil carbonates 

      Soto García, Isabel Sonsoles de Upna Orcid; Zamanian, Kazem; Urmeneta Martín-Calero, Henar; Enrique Martín, Alberto Upna Orcid; Virto Quecedo, Íñigo Upna Orcid (Frontiers Media, 2022)   Artículo / Artikulua  OpenAccess
      Inorganic and organic fertilizers have been widely used to maintain crop yields. However, several studies have demonstrated that the dissolution of carbonates in agricultural soils by the acidification induced by N-fertilizers ...
    • The importance of the urea cycle and its relationships to polyamine metabolism during ammonium stress in Medicago truncatula 

      Urra Rodríguez, Marina; Buezo Bravo, Javier Upna; Royo Castillejo, Beatriz Upna; Cornejo Ibergallartu, Alfonso Upna Orcid; López Gómez, Pedro Upna Orcid; Cerdán Ruiz, Daniel; Esteban Terradillos, Raquel; Martínez Merino, Víctor Upna Orcid; Gogorcena, Yolanda; Tavladoraki, Paraskevi; Morán Juez, José Fernando Upna Orcid (Oxford University Press, 2022)   Artículo / Artikulua  OpenAccess
      The ornithine–urea cycle (urea cycle) makes a signifcant contribution to the metabolic responses of lower photosynthetic eukaryotes to episodes of high nitrogen availability. In this study, we compared the role of the plant ...
    • Influence of the geometry on the performance of GMI in meander configuration 

      Beato López, Juan Jesús Upna Orcid; Lete, N.; García-Arribas, A.; Gómez Polo, Cristina Upna Orcid (Elsevier, 2022)   Artículo / Artikulua
      The effect of geometry on Giant Magnetoimpedance effect (GMI) in a meander structure composed of three amorphous magnetic ribbons ((Co0.94 Fe0.06)72,5 Si12.5 B15; 20 mm length) connected electrically in series is analyzed. ...
    • Valorization of onion waste by obtaining extracts rich in phenolic compounds and feasibility of its therapeutic use on colon cancer 

      Paesa, Mónica; Pires Nogueira, Danielle; Velderrain-Rodríguez, Gustavo; Esparza Catalán, Irene Upna; Jiménez Moreno, Nerea Upna Orcid; Mendoza, Gracia; Osada, Jesús; Martin-Belloso, Olga; Rodríguez Yoldi, María Jesús; Ancín Azpilicueta, Carmen Upna Orcid (MDPI, 2022)   Artículo / Artikulua  OpenAccess
      In this study, the total phenolic content, the antioxidant and antiproliferative activities of onion waste extracts were characterized. Some phenolic compounds present in the extracts were also identified and quantified ...
    • Extraction of phenolic compounds from populus salicaceae bark 

      Autor, E.; Cornejo Ibergallartu, Alfonso Upna Orcid; Bimbela Serrano, Fernando Upna Orcid; Maisterra Udi, Maitane Upna; Gandía Pascual, Luis Upna Orcid; Martínez-Merino, V. (MDPI, 2022)   Artículo / Artikulua  OpenAccess
      Lignocellulosic residues have the potential for obtaining high value-added products that could be better valorized if biorefinery strategies are adopted. The debarking of short-rotation crops yields important amounts of ...
    • Luminance calibration of a full sky HDR imaging system using sky scanner measurements 

      García Ruiz, Ignacio Upna Orcid; Sáenz Gamasa, Carlos Upna Orcid; Hernández Salueña, Begoña Upna Orcid; García Santos, Rafael Rogelio; Torres Escribano, José Luis Upna Orcid (Solar Energy Society, 2022)   Artículo / Artikulua  OpenAccess
      A full sky High Dynamic Range imaging system, based on a Single-Lens Reflex camera with a fisheye lens, has been constructed and calibrated with a sky scanner luminance meter. The method considers the geometrical, spectral, ...
    • Vanadium trapped by oblique nano-sheets to preserve the anisotropy in Co-V thin films at high temperature 

      Favieres Ruiz, Cristina Upna Orcid; Vergara Platero, José Upna Orcid; Magén, César; Ibarra, Manuel Ricardo; Madurga Pérez, Vicente Upna Orcid (Elsevier, 2022)   Artículo / Artikulua  OpenAccess
      In this study, oriented nano-sheets generated during the growth of cobalt-rich Co–V and Co–Zn thin films induced a large anisotropy in the magnetic and transport properties. The regular nano-sheets were tilted 52–54 deg. ...
    • Impact of a thermoelectric subcooler heat exchanger on a carbon dioxide transcritical refrigeration facility 

      Casi Satrústegui, Álvaro Upna Orcid; Aranguren Garacochea, Patricia Upna Orcid; Araiz Vega, Miguel Upna Orcid; Alegría Cía, Patricia; Astrain Ulibarrena, David Upna Orcid (Elsevier, 2022)   Artículo / Artikulua  OpenAccess
      To improve the performance of vapour compression refrigeration cycles, the inclusion of a thermoelectric subcooler for low-medium power units has been the focus of recent studies due to its robustness, compactness and ...
    • Progress and recent strategies in the synthesis and catalytic applications of perovskites based on lanthanum and aluminum 

      Muñoz Alvear, Helir Joseph; Korili , Sophia A. Upna Orcid; Gil Bravo, Antonio Upna Orcid (MDPI, 2022)   Artículo / Artikulua  OpenAccess
      Lanthanum aluminate-based perovskite (LaAlO3) has excellent stability at high temperatures, low toxicity, and high chemical resistance and also offers wide versatility to the substitution of La3+ and Al3+, thus, allowing ...
    • Acoustic and psychoacoustic levels from an internal combustion engine fueled by hydrogen vs. gasoline 

      Arana Burgui, Miguel Upna Orcid; San Martín Murugarren, Ricardo Upna Orcid; Urroz Unzueta, José Carlos Upna Orcid; Diéguez Elizondo, Pedro; Gandía Pascual, Luis Upna Orcid (Elsevier, 2022)   Artículo / Artikulua  OpenAccess
      Whereas noise generated by road traffic is an important factor in urban pollution, little attention has been paid to this issue in the field of hydrogen-fueled vehicles. The objective of this study is to analyze the influence ...
    • A techno-economic and life cycle assessment for the production of green methanol from CO2: catalyst and process bottlenecks 

      Cordero-Lanzac, Tomas; Ramirez, Adrián; Navajas León, Alberto Upna Orcid; Gevers, Lieven; Brunialti, Sirio; Gandía Pascual, Luis Upna Orcid; Aguayo, Andrés T.; Sarathy, S. Mani; Gascon, Jorge (Elsevier, 2022)   Artículo / Artikulua  OpenAccess
      The success of catalytic schemes for the large-scale valorization of CO2 does not only depend on the development of active, selective and stable catalytic materials but also on the overall process design. Here we present ...
    • Traffic restrictions during COVID-19 lockdown improve air quality and reduce metal biodeposition in tree leaves 

      Soba Hidalgo, David Upna; Gámez Guzmán, Angie Lorena Upna Orcid; Becerril, José María; Esteban Terradillos, Raquel; Aranjuelo Michelena, Iker (Elsevier, 2022)   Artículo / Artikulua  OpenAccess
      The coronavirus disease (COVID-19) has had a great global impact on human health, the life of people, and economies all over the world. However, in general, COVID-19´s effect on air quality has been positive due to the ...
    • A global synthesis on the effects of forest thinning on hydrological processes: implications for forest management 

      Campo, Antonio D. del; Otsuki, Kyoichi; Serengil, Yusuf; Blanco Vaca, Juan Antonio Upna Orcid; Yousefpour, Rasoul; Wei, Xiaohua (Elsevier, 2022)   Artículo / Artikulua  OpenAccess
      Forest thinning can significantly affect hydrological processes. However, these effects largely vary with forest types, climate, thinning intensity, and hydrological variables of interest. Understanding these effects and ...
    • Long-term carbon sequestration in pine forests under different silvicultural and climatic regimes in Spain 

      Navarro Cerrillo, Rafael M.; Ruiz Gómez, Francisco J.; Camarero, Jesús J.; Castillo, Víctor M.; Barberá, Gonzalo G.; Palacios Rodríguez, Guillermo; Navarro, Francisco B.; Blanco Vaca, Juan Antonio Upna Orcid; Imbert Rodríguez, Bosco Upna Orcid; Cachinero Vivar, Antonio M.; Molina, Antonio J.; Campo, Antonio D. del (MDPI, 2022)   Artículo / Artikulua  OpenAccess
      Proactive silviculture treatments (e.g., thinning) may increase C sequestration contributing to climate change mitigation, although, there are still questions about this effect in Mediterranean pine forests. The aim of ...
    • Tailoring magnetic and transport anisotropies in Co100−x –Cux thin films through obliquely grown nano-sheets 

      Favieres Ruiz, Cristina; Vergara Platero, José Upna Orcid; Madurga Pérez, Vicente Upna Orcid (MDPI, 2022)   Artículo / Artikulua  OpenAccess
      The magnetic and transport properties of pulsed laser-deposited Co100−x –Cux thin films were tailored through their nano-morphology and composition by controlling for the deposition geometry, namely normal or oblique ...
    • Catalytic photodegradation of organic compounds using TiO2/pillared clays synthesized using a nonconventional aluminum source 

      Cardona, Yaneth Upna Orcid; Węgrzyn, Agnieszka; Miśkowiec, Paweł; Korili , Sophia A. Upna Orcid; Gil Bravo, Antonio Upna Orcid (Elsevier, 2022)   Artículo / Artikulua  OpenAccess
      This study evaluates the photocatalytic degradation of 2,6-dichlorophenol (2,6-DCP), triclosan (TCS) and bisphenol A (BPA) by ultraviolet (UV) and visible (VIS) light in the presence of TiO2/catalysts synthesized by wet ...
    • Cellulose polymers with β-amino ester pendant group: design, synthesis, molecular docking and application in adsorption of toxic metals from wastewater 

      Nairat, Noor; Hamed, Othman; Berisha, Avni; Jodeh, Shehdeh; Algarra González, Manuel; Azzaou, Khalil; Dagdag, Omar; Samhan, Subhi (BioMed Central, 2022)   Artículo / Artikulua  OpenAccess
      Background: Cellulose polymers with multidentate chelating functionalities that have high eficiency for toxic metal ions present in water were designed, synthesized, and analyzed. The synthesis was carried out by reacting ...
    • Nanoparticle size distribution and surface effects on the thermal dependence of magnetic anisotropy 

      Gomide, Guilherme; Cabreira Gomes, Rafael; Gomes Viana, Márcio; Cortez Campos, Álex Fabiano; Aquino, Renata; López Ortega, Alberto Upna Orcid; Perzynski, Régine; Depeyrot, Jérõm (ACS Publications, 2022)   Artículo / Artikulua
      Standard approaches to investigate the anisotropy of nanoparticle assemblies are either by means of zero-field-cooled-field-cooled DC magnetization curves or by analyzing the coercivity at low temperatures. However, these ...