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Mostrando ítems 138-157 de 301

    • 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 Orcid; Recarte Callado, Vicente Upna Orcid; Pérez de Landazábal Berganzo, José Ignacio Upna Orcid; Zabala, Nerea; García, José Ángel; 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 ...

    • 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 ...

    • Impact of extraction conditions on the phenolic composition and antioxidant capacity of grape stem extracts 

      Jiménez Moreno, Nerea Upna Orcid; Volpe Sainz, Francesca Upna; Moler Cuiral, José Antonio Upna Orcid; Esparza Catalán, Irene Upna; Ancín Azpilicueta, Carmen Upna Orcid (MDPI, 2019)   Artículo / Artikulua  OpenAccess
      The use of grape stems for the extraction of bioactive compounds to be used in the pharmaceutical, food, and cosmetic industries is a promising objective. The aim of this work is to determine the influence of the different ...

    • 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 ...

    • Improved adhesion of cathodic arc PVD AlCrSiN coating on ion-implanted WC-Co substrates 

      Ortiz Membrado, Laia; García-González, Sandra; Orrit-Prat, Jordi; Bonet, Raül; Caro, Jaume; Fernández de Ara, Jonathan; Almandoz Sánchez, Eluxka Upna Orcid; Llanes, Luis; Jiménez-Piqué, Emilio (Elsevier, 2023)   Artículo / Artikulua  OpenAccess
      Ion implantation has been shown to improve adhesion strength of AlCrSiN coatings due to a synergic enhancement on fracture toughness and load bearing capability of the substrate that can potentially increase the in-service ...

    • Improved photocatalytic and antibacterial performance of Cr doped TiO2 nanoparticles 

      Gómez Polo, Cristina Upna Orcid; Larumbe Abuin, Silvia Upna; Gil Bravo, Antonio Upna Orcid; Muñoz Labiano, Delia Upna Orcid; Rodríguez Fernández, L.; Fernández Barquín, Luis; García-Prieto, Ana; Fernández-Gubieda, María Luisa; Muela, Alicia (Elsevier, 2021)   Artículo / Artikulua  OpenAccess
      The effect of Cr and N doping in the adsorption capacity, photocatalytic properties and antibacterial response of TiO2 anatase nanoparticles is analyzed. The nanoparticles (N-TiO2, Cr-TiO2 and Cr/N-TiO2) were prepared by ...

    • Improvement of the adsorption properties of an activated carbon coated by titanium dioxide for the removal of emerging contaminants 

      Taoufik, Nawal; Elmchaouri, Abdellah; Anouar, Fatna; Korili, Sophia A. Upna Orcid; Gil Bravo, Antonio Upna Orcid (Elsevier, 2019)   Artículo / Artikulua  OpenAccess
      Three activated carbon coated titanium dioxide composites are evaluated as adsorbents for the removal of three pharmaceutical compounds: clofibric, gallic and salicylic acids from aqueous solutions. These composite materials ...

    • In vitro evaluation of postbiotics produced from bacterial isolates obtained from rainbow trout and nile tilapia against the pathogens Yersinia ruckeri and Aeromonas salmonicida subsp. Salmonicida 

      Quintanilla Pineda, Mario Alejandro; Garrote Achou, Chajira Camila; Díaz, Jesús Vicente; Gutiérrez-Falcón, Ana; Bravo, María; Herrera-Muñoz, Juan Ignacio; Peña-Navarro, Nelson; Alvarado, Carlos; Ibáñez Moya, Francisco C. Upna Orcid; Marzo Pérez, Florencio Upna Orcid (MDPI, 2023)   Artículo / Artikulua  OpenAccess
      The use of antibiotics in aquaculture leads to the proliferation of multidrug-resistant bacteria, and an urgent need for developing new alternatives to prevent and control disease has, thus, arisen. In this scenario, ...

    • Incorporating climate effects in Larix gmelinii improves stem taper models in the Greater Khingan Mountains of Inner Mongolia, northeast China 

      Liu, Yang; Trancoso, Ralph; Ma, Qin; Yue, Chaofang; Wei, Xiaohua; Blanco Vaca, Juan Antonio Upna Orcid (Elsevier, 2020)   Artículo / Artikulua  OpenAccess
      Estimating timber volume and carbon stock in forests is fundamental for silviculture and for accurate estimation of national and global carbon budgets. Taper models are important tools for predicting diameter at any height ...

    • Indole-3-acetaldoxime delays root iron-deficiency responses and modify auxin homeostasis in medicago truncatula 

      Roman, Angela; Montenegro, Joaquín; Fraile, Laura; Urra Rodríguez, Marina; Buezo Bravo, Javier Upna; Cornejo Ibergallartu, Alfonso Upna Orcid; Morán Juez, José Fernando Upna Orcid; Gogorcena, Yolanda (Elsevier, 2023)   Artículo / Artikulua  OpenAccess
      Iron (Fe) is an essential plant micronutrient, being a major limiting growth factor in calcareous soils. To increase Fe uptake, plants induce lateral roots growth, the expression of a Fe(III)-chelate reductase (FCR), a ...

    • Influence of bi content on the temperature of the formation of the hard magnetic MnBi phase: simultaneous irreversible drop of resistance 

      Vergara Platero, José Upna Orcid; Favieres Ruiz, Cristina Upna Orcid; Madurga Pérez, Vicente Upna Orcid (MDPI, 2022)   Artículo / Artikulua  OpenAccess
      Pulsed laser-deposited (PLD) MnBi films were fabricated by alternating deposition of Mn and Bi layers. In order to obtain the ferromagnetic MnBi phase, heat treatments were performed on the samples. Simultaneously, the ...

    • Influence of porosity on the elastic modulus of Ti-Zr-Ta-Nb foams with a low Nb content 

      Aguilar Ramírez, Claudio Eduardo; Arancibia, Mariette; Alfonso, Ismeli; Sancy, Mamie; Tello, Karem; Salinas, Vicente; Cuevas Jiménez, Fernando de las Upna Orcid (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 ...

    • Influence of structural defects on the properties of metamagnetic shape memory alloys 

      Pérez de Landazábal Berganzo, José Ignacio Upna Orcid; Sánchez-Alarcos Gómez, Vicente Upna Orcid; Recarte Callado, Vicente Upna Orcid; Lambri, Osvaldo Agustín; López García, Javier Upna (MDPI, 2020)   Artículo / Artikulua  OpenAccess
      The production of µ-particles of Metamagnetic Shape Memory Alloys by crushing and subsequent ball milling process has been analyzed. The high energy involved in the milling process induces large internal stresses and high ...

    • 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. ...

    • Innovative flow-through reaction system for the sustainable production of phenolic monomers from lignocellulose catalyzed by supported Mo2C 

      Maisterra Udi, Maitane Upna; Atienza Martínez, María Upna Orcid; Hablich Alvarracin, Karina Lissett Upna; Moreira, Rui; Martínez Merino, Víctor Upna Orcid; Gandía Pascual, Luis Upna Orcid; Cornejo Ibergallartu, Alfonso Upna Orcid; Bimbela Serrano, Fernando Upna Orcid (Wiley, 2024)   Artículo / Artikulua  OpenAccess
      Molybdenum carbide supported on activated carbon (β-Mo2C/AC) has been tested as catalyst in the reductive catalytic fractionation (RCF) of lignocellulosic biomass both in batch and in Flow-Through (FT) reaction systems. ...

    • Insecticidal activity of bacillus thuringiensis proteins against coleopteran pests 

      Domínguez Arrizabalaga, Mikel Upna Orcid; Villanueva San Martín, Maite Upna Orcid; Escriche, Baltasar; Ancín Azpilicueta, Carmen Upna Orcid; Caballero Murillo, Primitivo Upna Orcid (MDPI, 2020)   Artículo / Artikulua  OpenAccess
      Bacillus thuringiensis is the most successful microbial insecticide agent and its proteins have been studied for many years due to its toxicity against insects mainly belonging to the orders Lepidoptera, Diptera and ...

    • Interactions between climate and nutrient cycles on forest response to global change: the role of mixed forests 

      González de Andrés, Ester Upna Orcid (MDPI, 2019)   Artículo / Artikulua  OpenAccess
      Forest ecosystems are undergoing unprecedented changes in environmental conditions due to global change impacts. Modification of global biogeochemical cycles of carbon and nitrogen, and the subsequent climate change are ...

    • La intervención adulta determina el desarrollo de las destrezas científicas en la etapa de infantil 

      Napal Fraile, María Upna Orcid; Vázquez Bienzobas, Lara (Universitat de València, 2023)   Artículo / Artikulua  OpenAccess
      Los niños y niñas de edad preescolar alcanzan cierto dominio de las destrezas procedimentales científicas (SPS) al exponerse a contextos de aprendizaje ricos, donde la intervención adulta resulta determinante. Por ese ...

    • Iron oxide nanorings and nanotubes for magnetic hyperthermia: the problem of intraparticle interactions 

      Das, Raja; Alonso Masa, Javier; Kalappattil, Vijaysankar; Nemati, Zohreh; Rodrigo, Irati; Garayo Urabayen, Eneko Upna Orcid; García, José Ángel; Manh-Huong, Phan; Srikanth, Hariharan (MDPI, 2021)   Artículo / Artikulua  OpenAccess
      Magnetic interactions can play an important role in the heating efficiency of magnetic nanoparticles. Although most of the time interparticle magnetic interactions are a dominant source, in specific cases such as multigranular ...

    • Isolation of the elusive heptavanadate anion with trisalkoxide ligands 

      Fernández-Navarro, Leticia; Nunes-Collado, Aitor; Artetxe, Beñat; Ruiz-Bilbao, Estíbaliz; San Felices, Leire; Reinoso, Santiago Upna Orcid; San José Wéry, Ana; Gutiérrez Zorrilla, Juan M. (ACS, 2021)   Artículo / Artikulua  OpenAccess
      The unprecedented heptavanadate cluster has been isolated from reactions between trisalkoxide ligands and vanadatein water at pH = 2 as a series of alkylammonium [HxV7O18(H2O)((OCH2)3CR)](4−x)‑salts (1−3,R=CH2OH;4,R=CH3). ...
      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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