Recent Submissions

  • 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 ...
  • Along-the-path exponential integration for Floquet stability analysis of wind turbines 

    Ros Ganuza, Javier Upna Orcid; Olcoz Alonso, Álvaro; Plaza Puértolas, Aitor Upna Orcid (IOP Publishing, 2022)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    Traditionally, stability assessment of wind turbines has been performed by eigenanalysis of the azimuthally-averaged linearized system after applying the Multi-Blade Coordinate (MBC) transformation. However, due to ...
  • 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, ...
  • Mesoporous Sn-in-MCM-41 catalysts for the selective sugar conversion to methyl lactate and comparative life cycle assessment with the biochemical process 

    Iglesia, Óscar de la; Sarango, Miryan; Munárriz, Mikel; Malankowska, Magdalena; Navajas León, Alberto Upna Orcid; Gandía Pascual, Luis Upna Orcid; Coronas, Joaquín; Téllez, Carlos (ACS Publications, 2022)   Artículo / Artikulua  OpenAccess
    The use of biomass for the production of energy and higher added value products is a topic of increasing interest in line with growing environmental concerns and circular economy. Mesoporous material Sn-In-MCM-41 was ...
  • 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 ...
  • 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 ...
  • Nitrene formation is the first step of the thermal and photochemical decomposition reactions of organic azides 

    Soto, Juan; Algarra González, Manuel; Peláez, Daniel (Royal Society of Chemistry, 2022)   Artículo / Artikulua  OpenAccess
    In this work, the decomposition of a prototypical azide, isopropyl azide, both in the ground and excited states, has been investigated through the use of multiconfigurational CASSCF and MS-CASPT2 electronic structure ...
  • Martensitic transformation controlled by electromagnetic field: from experimental evidence to wireless actuator applications 

    Garayo Urabayen, Eneko Upna Orcid; La Roca, Paulo Matías Upna; Gómez Polo, Cristina Upna Orcid; Sánchez-Alarcos Gómez, Vicente Upna Orcid; Recarte Callado, Vicente Upna Orcid; Pérez de Landazábal Berganzo, José Ignacio Upna Orcid (Elsevier, 2022)   Artículo / Artikulua  OpenAccess
    Mechanical actuators based on shape memory alloys (SMA) are becoming a key component in the development of novel soft robotic applications and surgically implantable devices. Their working principle relies in the temperature ...
  • Hybrid xerogels doped with Tb(III) and Eu (III) and a water soluble Pybox ligand 

    Cruz Quesada, Guillermo Upna Orcid; Espinal-Viguri, Maialen Upna Orcid; Garrido Segovia, Julián José Upna Orcid (2021)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    Hybrid organic-inorganic siliceous materials (ORMOSiLs) are a key focus within the nanoscience area as they combine advantages of inorganic materials without losing characteristics intrinsic of organic molecules. In the ...
  • New hybrid organochlorinated xerogels 

    Cruz Quesada, Guillermo Upna Orcid; Espinal-Viguri, Maialen Upna Orcid; López Ramón, María Victoria; Garrido Segovia, Julián José Upna Orcid (2021)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    Hybrid silica xerogels (HSXG) combine the properties of organic and inorganic components in the same material, which makes them promising and versatile candidates for multiple applications. These materials can be easily ...
  • Unraveling nitrate-mediated mechanisms in response to ammonium toxicity in plants 

    Rivero Marcos, Mikel Upna Orcid (2022)   Tesis doctoral / Doktoretza tesia
    Intensive use of nitrate in agriculture has resulted in serious environmental and health problems; however, using ammonium as an exclusive, alternative nitrogen source can have deleterious effects on plant growth. Even at ...
  • 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 ...
  • Organic carbon storage and dynamics as affected by the adoption of irrigation in a cultivated calcareous mediterranean soil 

    Antón Sobejano, Rodrigo Upna; Derrien, Delphine; Urmeneta Martín-Calero, Henar; Van der Heijden, Gregory; Enrique Martín, Alberto Upna Orcid; Virto Quecedo, Íñigo Upna Orcid (Frontiers Media, 2022)   Artículo / Artikulua  OpenAccess
    Irrigation is in the spotlight of land-use planning in semi-arid and sub-humid regions. It can be a promising practice to promote soil organic C storage (SOC), although it may also involve an increase in soil GHG emissions. ...
  • Potencialidades del frijol caupí para la resiliencia al cambio climático en sistemas agrícolas locales 

    Santana-Baños, Yoerlandy; González García, Esther Upna Orcid; Ariz, Idoia Upna Orcid; Carrodeguas Díaz, Sergio (2022)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    Las evidencias científicas sugieren tres usos fundamentales del frijol caupí, con agro-ecológicas y beneficios productivos, sociales y ambientales en los sistemas agrícolas locales; sin embargo, su rendimiento a nivel ...
  • Iron based nanostructures: synthesis, characterization and environmental applications 

    Cervera Gabalda, Laura María Upna (2022)   Tesis doctoral / Doktoretza tesia
    En los últimos años, la contaminación ambiental se ha convertido en un tema de preocupación pública. Debido a diferentes actividades, diversos compuestos orgánicos e inorgánicos acaban en el medio ambiente afectando sobre ...
  • 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. ...
  • 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. ...
  • Subjective evaluation of the localization performance of the spherical wavelet format compared to ambisonics 

    Eguinoa Cabrito, Rubén; San Martín Murugarren, Ricardo Upna Orcid; Arteaga, Daniel; Scaini, Davide (IEEE, 2021)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    A common goal of most spatial audio techniques is to reproduce the precise location and size of sound sources. Ambisonics is a well-established spatial audio technique that renders sound sources with increasing accuracy ...
  • Desarrollo de catalizadores basados en rodio y otros metales de transición para la producción de gas de síntesis a partir de biogás 

    Navarro Puyuelo, Andrea (2021)   Tesis doctoral / Doktoretza tesia
    El objetivo último de esta tesis doctoral es formular catalizadores de Rh y Co y desarrollar, a partir de las mejores formulaciones, sistemas catalíticos estructurados para la producción de gas de síntesis mediante el ...
  • 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 ...

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