Now showing items 1-20 of 36

  • Aggregate expansivity due to sulfied oxidation - I. Reaction system and rate model 

    Casanova Hormaechea, Ignasi; Agulló Fité, Luís; Aguado de Cea, Antonio (Aggregate expansivity due to sulfied oxidation - I. Reaction system and rate model, 1996)
    Article
    Open Access
    Oxidation and hydration of sulfides in aggregate materials can yield to expansive reactions that affect the durability of concrete. This process is, in principle, independent from the potential alkali-aggregate reactivity, ...
  • Amorphous carbon modified nano-sized tungsten carbide as a gas diffusion electrode catalyst for the oxygen reduction reaction 

    Liu, Zhiwei; Li, Ping; Zhai, Fuqiang; Wan, Qi; Volinsky, Alex A.; Qu, Xuanhui (2015-01-01)
    Article
    Open Access
    Nanostructured tungsten carbide with high surface area and containing amorphous carbon is prepared by a low temperature combustion synthesis method. The nanostructured tungsten carbide is used as the catalyst in a gas ...
  • Asymmetric sulfoxidation by engineering the heme pocket of a dye-decolorizing peroxidase 

    Linde, Dolores; Cañellas, Marina; Coscolín, Cristina; Davó-Siguero, Irene; Romero, Antonio; Lucas, Fátima; Ruiz-Dueñas, Francisco J.; Guallar, Víctor; Martínez, Ángel T. (Royal Society of Chemistry, 2016-05-23)
    Article
    Open Access
    The so-called dye-decolorizing peroxidases (DyPs) constitute a new family of proteins exhibiting remarkable stability. With the aim of providing them new catalytic activities of biotechnological interest, the heme pocket ...
  • Avocado seed: A comparative study of antioxidant content and capacity in protecting oil models from oxidation 

    Segovia Gómez, Francisco José; Hidalgo Lopez, Gádor-Indra; Villasante, Juliana; Ramis Juan, Xavier; Almajano Pablos, María Pilar (2018-09-21)
    Article
    Open Access
    Increasingly, consumers want products containing little or no synthetic compounds. Avocado seeds, which are a residue of the food industry, could be used to obtain extracts with high antioxidant power. In the present study, ...
  • Comportament a alta temperatura d'aliatges de titani per aplicacions en el sector aeroespacial 

    Margalef Solé, Josep (Universitat Politècnica de Catalunya, 2017-10)
    Bachelor thesis
    Open Access
    En aquest treball s’estudien els fenòmens d’oxidació que tenen lloc en l’aliatge de titani Ti-6Al-4V quan és sotmet a tractaments tèrmics cíclics a elevades temperatures, per tal de simular condicions en servei que pot ...
  • Corn starch and gelatin-based films added with guabiroba pulp for application in food packaging 

    Malherbi, Naiane Miriam; Schmitz, Ana Camila; Grando, Remili Cristiani; Bilck, Ana Paula; Velasco Perero, José Ignacio (Elsevier Ltd, 2019-03-01)
    Article
    Restricted access - publisher's policy
    The guabiroba pulp (GP) has natural antioxidant compounds, such as phenolic compounds and ascorbic acid. The aim of this work was to produce an active biodegradable film based on blends of gelatin (GEL) and corn starch ...
  • Degradation and mineralization of Bisphenol A by the photo fenton process 

    Navarro Jordà, Marina; Graells Sobré, Moisès; Pérez Moya, Montserrat (2014)
    Conference lecture
    Open Access
    Bisphenol A (BPA; 2,2-bis (4-hydroxyphenyl) propane) is an industrial organic chemical basically used in the plastics industry as a monomer for producing epoxy resins and polycarbonates [1,2]. It is also a well-known endocrine ...
  • Elucidating the chemical nature of laccase-modified alkyl gallates 

    Cusola Aumedes, Oriol; Valls Vidal, Cristina; Vidal Lluciá, Teresa; Roncero Vivero, María Blanca (Universidade de Aveiro, 2018)
    Conference lecture
    Restricted access - publisher's policy
    In the present work we investigated the chemical changes undergone by enzyme-oxidized lauryl gallate (LG, dodecyl 3,4,5,-trihydroxybenzoate) by using Fourier transform infrared (FTIR) spectroscopy, and an oxidation mechanism ...
  • Entwicklung von Platin-MMC Elektrodenwerkstoffen für Zündkerzen 

    Yedra Cardona, Lluís (Universitat Politècnica de Catalunya / Universität Saarlandes, 2008)
    Master thesis (pre-Bologna period)
    Restricted access - confidentiality agreement
  • Environment related surface phenomena and their influence on properties of Ti-6Al-4V and Ti-6Al-2Sn-4Zr-2Mo : oxidation at elevated temperature and corrosion during chemical treatment 

    Sefer, Birhan (Universitat Politècnica de Catalunya, 2016-09-29)
    Doctoral thesis
    Open Access
    Covenantee:  Luleå tekniska universitet
    This thesis covers investigation of the surface phenomena of Ti-6Al-4V and Ti-6Al-2Sn-4Zr-2Mo alloys related with oxidation at elevated temperature and corrosion during chemical treatment in hydrofluoric-nitric acid (HF/HNO3) ...
  • Estudi de la interacció metall-suport en catalitzadors Au/CeO2 a través de les reaccions d'oxidació de CO i CO-PrOx per a la purificació d'hidrogen 

    Urrich Subinas, Aitor (Universitat Politècnica de Catalunya, 2017-09)
    Open Access
    L’hidrogen, en un món on cada vegada s’utilitzen menys recursos amb contingut de carboni, es perfila com a actor principal en el marc energètic, i cada vegada serà més explotat com a al·limentació en les PEMFC (Polymer ...
  • Evolution of pyrrhotite oxidation in aggregates for concrete 

    Oliveira da Silva, Izelman; Pialarissi Cavalaro, Sergio Henrique; Aguado de Cea, Antonio (2014-11-17)
    Article
    Open Access
    Rocks containing pyrrhotite bands are sometimes used to produce concrete. These rocks oxidize and produce long-term expansive reactions that damage concrete structures, leading to important economic and risk related ...
  • Improving selective thermal emission properties of three-dimensional macroporous silicon through porosity tuning 

    Garin Escriva, Moises; Todorov Trifonov, Trifon; Rodríguez Martínez, Ángel; Alcubilla González, Ramón; Marquier, F.; Arnold, C.; Greffet, J.-J. (American Institute of Physics, 2008-08-27)
    Article
    Restricted access - publisher's policy
    We present a theoretical and experimental study on the effect of progressive porosity increase, through multiple oxidation/oxide removal steps, upon the optical characteristics in threedimensional macroporous silicon. ...
  • Improving the Oxidative Stability of a High Redox Potential Fungal Peroxidase by Rational Design 

    Sáez-Jiménez, Veronica; Acebes, Sandra; Guallar, Víctor; Martínez, Angel T.; Ruiz-Dueñas, Francisco Javier (PLoS, 2015-04-29)
    Article
    Open Access
    Ligninolytic peroxidases are enzymes of biotechnological interest due to their ability to oxidize high redox potential aromatic compounds, including the recalcitrant lignin polymer. However, different obstacles prevent ...
  • Increased conductivity of a hole transport layer due to oxidation by a molecular nanomagnet 

    Cheylan, Stephanie; Puigdollers i González, Joaquim; Bolink, Henk J.; Coronado Miralles, Eugenio; Voz Sánchez, Cristóbal; Alcubilla González, Ramón; Badenes Guia, Gonçal (American Institute of Physics, 2008-05-14)
    Article
    Restricted access - publisher's policy
    Thin film transistors based on polyarylamine poly?N,N?-diphenyl-N,N ?bis?4-hexylphenyl?- ?1,1?biphenyl?-4,4?-diamine ?pTPD? were fabricated using spin coating in order to measure the mobility of pTPD upon oxidation. ...
  • Increased conductivity of a hole transport layer due to oxidation by a molecular nanomagnet - art. no. 096110 

    Cheylan, Stephanie; Puigdollers i González, Joaquim; Bolink, H J; Coronado, E; Voz Sánchez, Cristóbal; Alcubilla González, Ramón; Badenes, G (American Institute of Physics (AIP), 2008-05)
    Article
    Restricted access - publisher's policy
    Thin film transistors based on polyarylamine poly(N,N'-diphenyl-N,N'bis(4-hexylphenyl)-[1,1'biphenyl]-4,4'-diamine (pTPD) were fabricated using spin coating in order to measure the mobility of pTPD upon oxidation. Partially ...
  • Influence of cyclic thermal treatments on the oxidation behavior of Ti-6Al- 2Sn-4Zr-2Mo alloy 

    Fargas Ribas, Gemma; Roa Rovira, Joan Josep; Sefer, B.; Mateo García, Antonio Manuel (2018-11-01)
    Article
    Restricted access - publisher's policy
    Ti-6Al-2Sn-4Zr-2Mo is one of the most common titanium alloys for aerospace industry. This alloy experiences oxidation phenomenon at elevated temperatures. In the present study, cyclic thermal treatments were performed in ...
  • Influence of cyclic thermal treatments on the oxidation behavior of Ti-6Al-2Sn-4Zr-2Mo alloy 

    Fargas Ribas, Gemma; Roa Rovira, Joan Josep; Sefer, Birhan; Mateo García, Antonio Manuel (2018-11-01)
    Article
    Restricted access - publisher's policy
    Ti-6Al-2Sn-4Zr-2Mo is one of the most common titanium alloys for aerospace industry. This alloy experiences oxidation phenomenon at elevated temperatures. In the present study, cyclic thermal treatments were performed in ...
  • Macroporous silicon microreactor for the preferential oxidation of CO 

    Divins, N.J.; López, E.; Llorca, J.; Vega, Didac; Rodríguez Martínez, Ángel; González de Rivera, F.; Angurell, I.; Seco, M.; Rossell, O. (Institute of Electrical and Electronics Engineers (IEEE), 2013)
    Conference report
    Restricted access - publisher's policy
    A macroporous silicon micromonolith containing ca. 40,000 regular channels of 3.3 μm in diameter per square millimeter has been successfully functionalized with an Au/TiO2 catalyst for CO preferential oxidation (CO-PrOx) ...
  • Magnetite-supported palladium single-atoms do not catalyse the hydrogenation of alkenes but small clusters do 

    Rosell, Marta D.; Caparrós, Francisco J.; Angurell Purroy, Inmaculada; Müller Jevenois, Guillermo; Llorca Piqué, Jordi; Seco García, Miquel Angel; Rosell, Oriol (2016-01-01)
    Article
    Open Access
    The activity of supported noble metal catalysts strongly depends on the particle size. The ultimate small-size limit is the single-atom catalyst (SAC), which maximizes the catalytic efficiency in the majority of the examples. ...