Now showing items 1-20 of 32

    • A fungal ascorbate oxidase with unexpected laccase activity 

      Braunschmid, Verena; Fuerst, Sarah; Perz, veronika; Zitzenbacher, Sabine; Hoyo Pérez, Javier; Fernandez Sanchez, Cesar; Tzanov, Tzanko; Steinkellner, Georg; Gruber, Karl; Nyanhongo, Gibson S.; Ribitsch, Doris; Guebitz, Georg (2020-08-11)
      Article
      Open Access
      Ascorbate oxidases are an enzyme group that has not been explored to a large extent. So far, mainly ascorbate oxidases from plants and only a few from fungi have been described. Although ascorbate oxidases belong to the ...
    • A potential lignocellulosic biomass based on banana waste for critical rare earths recovery from aqueous solutions 

      Lapo Calderón, Byron Gonzalo; Bou Serra, Jordi; Hoyo Pérez, Javier; Tzanov, Tzanko; Carrillo, Manuel; Peña, Karina; Sastre Requena, Ana María (2020-04-29)
      Article
      Restricted access - publisher's policy
      Rare earth elements (REE) present multiple applications in technological devices but also drawbacks (scarcity and water contaminant). The current study aims to valorise the banana wastes - banana rachis (BR), banana ...
    • Antibody-enabled antimicrobial nanocapsules for selective elimination of Staphylococcus aureus 

      Ivanova, Kristina Dimitrova; Asenova Ivanova, Aleksandra; Ramon Portés, Eva; Hoyo Pérez, Javier; Sanchez-Gomez, Susana; Tzanov, Tzanko (2020-07-16)
      Article
      Open Access
      Targeted bactericide nanosystems hold significant promise to improve the efficacy of existing antimicrobials for treatment of severe bacterial infections, minimizing the side effects and lowering the risk of antibiotic ...
    • Biomimetic monolayer films of digalactosyldiacylglycerol incorporating plastoquinone 

      Hoyo Pérez, Javier; Guaus Guerrero, Ester; Torrent Burgués, Juan; Sanz Carrasco, Fausto (2015-06-01)
      Article
      Open Access
      The photosynthesis is the process used by plants and bacteria cells to convert inorganic matter in organic thanks to the light energy. This process consist on several steps, being one of them the electronic transport from ...
    • Biomimetic monolayer films of monogalactosyldiacylglycerol incorporating plastoquinone 

      Hoyo Pérez, Javier; Guaus Guerrero, Ester; Torrent Burgués, Juan; Sanz Carrasco, Fausto (2015-05-01)
      Article
      Restricted access - publisher's policy
      Photosynthetic organisms use light to convert the inorganic matter in organic one. Photosynthetic process consists on several steps, and one of them involves plastoquinone (PQ) that acts as electron and proton shuttle ...
    • Biomimetic monolayer films of monogalactosyldiacylglycerol incorporating ubiquinone 

      Hoyo Pérez, Javier; Torrent Burgués, Juan; Guaus Guerrero, Ester (2012-09-01)
      Article
      Open Access
      Ubiquinone and plastoquinone are two of the main electron and proton shuttle molecules in biological systems, and monogalactosyldiacylglycerol (MGDG) is the most abundant lipid in the thylakoid membrane of chloroplasts. ...
    • Bottom-up layer-by-layer assembling of antibacterial freestanding nanobiocomposite films 

      Francesko, Antonio; Ivanova, Kristina Dimitrova; Hoyo Pérez, Javier; Pérez-Rafael, Silvia; Petkova, Petya; Fernandes Macedo, Margarida Maria; Heinze, Thomas; Mendoza Gómez, Ernesto; Tzanov, Tzanko (2018-07-27)
      Article
      Open Access
      In this study, freestanding nanobiocomposite films were obtained by the sequential deposition of biopolymer-capped silver nanoparticles (AgNPs) and hyaluronic acid (HA). At first, dispersions ofAgNPs decorated with chitosan ...
    • Characterization of redox precesses in biomimetic cell membrane 

      Hoyo Pérez, Javier (Universitat Politècnica de Catalunya, 2010-09)
      Master thesis
      Restricted access - author's decision
    • Durable antimicrobial cotton textiles coated sonochemically with ZnO nanoparticles embedded in an in-situ enzymatically generated bioadhesive 

      Salat, Marc; Petkova, Petya; Hoyo Pérez, Javier; Perelshtein, Ilana; Gedanken, Aharon; Tzanov, Tzanko (2018-02-14)
      Article
      Open Access
      An important preventive measure for providing a bacteria-free environment for the patients is the introduction of highly efficient and durable antibacterial textiles in hospitals. This work describes a single step ...
    • Electrochemical behaviour of mixed LB films of ubiquinone-DPPC 

      Hoyo Pérez, Javier; Guaus Guerrero, Ester; Torrent Burgués, Juan; Sanz Carrasco, Fausto (2012-03)
      Article
      Open Access
      The structure and the electrochemical behaviour of Langmuir and Langmuir–Blodgett (LB) films of the biological ubiquinone-10 (UQ) and a mixture of dipalmytoilphosphatidylcholine (DPPC) and UQ at the molar ratios DPPC:UQ ...
    • Electrochemistry of LB films of mixed MGDG:UQ on ITO 

      Hoyo Pérez, Javier; Guaus Guerrero, Ester; Torrent Burgués, Juan; Sanz Carrasco, Fausto (2015-02-21)
      Article
      Open Access
    • Electron transfer processes in biomimetic membranes incorporating prenylquinones 

      Hoyo Pérez, Javier (Universitat Politècnica de Catalunya, 2014-10-17)
      Doctoral thesis
      Open Access
      The photosynthesis is the process used by the plants and bacteria cells to convert the inorganic matter in organic thanks to the light energy. This process consist on several steps, being one of them the plastoquinone-9 ...
    • Enzymatic synthesis of a thiolated chitosan-based wound dressing crosslinked with chicoric acid 

      Stefanov, Ivaylo; Hinojosa Caballero, Dolores; Maspoch, Santiago; Hoyo Pérez, Javier; Tzanov, Tzanko (Royal Society of Chemistry (RSC), 2018-10-26)
      Article
      Open Access
      This work describes the enzymatic synthesis of multifunctional hydrogels for chronic wound treatment using thiolated chitosan and the natural polyphenol chicoric acid. Gelation was achieved by ...
    • Hybrid tellurium-lignin nanoparticles with enhanced antibacterial properties 

      Morena Gatius, Ángela Gala; Bassegoda Puigdomenech, Arnau; Hoyo Pérez, Javier; Tzanov, Tzanko (2021-04-07)
      Article
      Open Access
      The surge of antibiotic-resistant bacteria is leading to the loss of antibiotic treatment effectiveness, resulting in prolonged infections and even death. Against this healthcare threat, antimicrobial nanoparticles that ...
    • Incorporation of ubiquinone in supported lipid bilayers on ITO 

      Hoyo Pérez, Javier; Guaus Guerrero, Ester; Oncins, Gerard; Torrent Burgués, Juan; Sanz Carrasco, Fausto (2013-05-31)
      Article
      Restricted access - publisher's policy
      Ubiquinone (UQ) is one of the main electron and proton shuttle molecules in biological systems, and dipalmitoylphosphatidylcholine (DPPC) is one of the most used model lipids. Supported planar bilayers (SPBs) are extensively ...
    • Influence of membrane galactolipids and surface pressure on plastoquinone behaviour 

      Hoyo Pérez, Javier; Guaus Guerrero, Ester; Torrent Burgués, Juan (2016-10)
      Article
      Open Access
      In this work biomimetic monolayers of a MGDG, monogalactosyldiacylglycerol, and DGDG, digalactosyldiacylglycerol mixture (MD), in a ratio close to that of the thylakoid membranes of oxygenic photosynthetic organisms, have ...
    • Innovative approaches for controlling clinically relevant biofilms: current trends and future prospects 

      Ivanova, Kristina Dimitrova; Tzanov, Tzanko; Hoyo Pérez, Javier; Ramon Portés, Eva (2017-01-05)
      Article
      Open Access
      Bacteria that colonize and form biofilms on living tissues and medical devices are a global healthcare concern. They cause life threatening infections and are associated with increased mortality and morbidity in the ...
    • Interaction of silver-lignin nanoparticles with mammalian mimetic membranes 

      Hoyo Pérez, Javier; Ivanova, Kristina Dimitrova; Torrent Burgués, Juan; Tzanov, Tzanko (Frontiers Media SA, 2020-05-08)
      Article
      Open Access
      Silver nanoparticles (AgNPs) have broad spectrum antibacterial activity, but their toxicity to human cells has raised concerns related to their use as disinfectants or coatings of medically relevant surfaces. To address ...
    • Layer-by-layer decorated nanoparticles with tunable antibacterial and antibiofilm properties against both gram-positive and gram-negative bacteria 

      Asenova Ivanova, Aleksandra; Ivanova, Kristina Dimitrova; Hoyo Pérez, Javier; Sanchez-Gomez, Susana; Heinze, Thomas; Tzanov, Tzanko (2018-01-09)
      Article
      Open Access
      acteria-mediated diseases are a global healthcare concern due to the development and spread of antibiotic resistant strains. Cationic compounds are considered membrane active biocidal agents having a great potential to ...
    • Lipid artificial tears at a mimetic ocular interface 

      Torrent Burgués, Juan; Hoyo Pérez, Javier; Tzanov, Tzanko (2021-08)
      Article
      Open Access
      We studied the behaviour of three lipid tear products, commercialised by the same brand, as Langmuir films at the air/liquid interface to simulate the ocular environment. No significant differences were observed in the ...