Enviaments recents

  • Developing antioxidant capacity to cellulose-based materials by using enzymatically-modified products 

    Cusola Aumedes, Oriol; Valls Vidal, Cristina; Vidal Lluciá, Teresa; Roncero Vivero, María Blanca (2015)
    Comunicació de congrés
    Accés restringit per política de l'editorial
    In the present work various laccases (Lac) and different phenolic compounds potentially possessing antioxidant action were used in an enzymatic reaction to prepare several functionalization solutions (FS), which were then ...
  • Endoglucanase treatments for improving pulp reactivity in biobleached and commercial dissolving pulps 

    Quintana, Elisabet; Valls Vidal, Cristina; Vidal Lluciá, Teresa; Roncero Vivero, María Blanca (2015)
    Comunicació de congrés
    Accés restringit per política de l'editorial
    In this study, a bleached commercial dissolving pulp and a TCF sulphite pulp, bleached at the laboratory scale with a laccase–violuric acid system and complemented with a pressurized hydrogen peroxide stage (LVAPO), were ...
  • Effects of a cellulase treatment on the preparation process and final properties of nanocrystalline cellulose 

    Beltramino Heffes, Facundo; Roncero Vivero, María Blanca; Vidal Lluciá, Teresa; Torres López, Antonio Luis; Valls Vidal, Cristina (2015)
    Comunicació de congrés
    Accés restringit per política de l'editorial
    In this work, we introduced an enzymatic treatment with a cellulase prior to NCC isolation from fibers via sulfuric acid hydrolysis, combining biotechnological and chemical procedures. NCC isolation process has typically ...
  • New strategies to bleach dissolving pulps using enzymatic treatments 

    Quintana, Elisabet; Valls Vidal, Cristina; Vidal Lluciá, Teresa; Roncero Vivero, María Blanca (2014)
    Text en actes de congrés
    Accés obert
    A biobleaching sequence was applied to sulphite pulp in order to explore new bleaching possibilities using enzymatic treatments. Therefore, the well-known laccase-mediator system was used with the aim to achieve dissolving ...
  • Evaluating changes on cellulosic biobleached fibers by means of thermogravimetric analysis 

    Quintana, Elisabet; Garcia Barneto, Agustín; Valls Vidal, Cristina; Vidal Lluciá, Teresa; Ariza, J.; Roncero Vivero, María Blanca (2014)
    Comunicació de congrés
    Accés restringit per política de l'editorial
    The effects on fibre surface produced by the laccase-mediator system on softwood sulphite fibres were analysed in terms of surface crystallinity using thermogravimetric analysis. The starting pulp presented low content of ...
  • Monitoring oxidation-reduction potential of laccase-mediator system: can the efficiency of a redox mediator for deslignifying kenaf pulp be predicted? 

    Andreu Terrén, Glòria; Vidal Lluciá, Teresa (2014)
    Comunicació de congrés
    Accés restringit per política de l'editorial
    The oxidative ability of five phenolic compounds (acetosyringone, syringaldehyde, p-coumaric acid, vanillin and actovanillone) and the laccase–mediator systems was determined by monitoring the oxidation–reduction potential ...
  • Using glycosidases to modify TCF bleached specialty sisal fibers 

    Beltramino Heffes, Facundo; Valls Vidal, Cristina; Vidal Lluciá, Teresa; Roncero Vivero, María Blanca (2014)
    Comunicació de congrés
    Accés restringit per política de l'editorial
    Modifying fibers in order to upgrade them to dissolving grade involves several changes. Paper grade pulps can be used to yield this kind of raw materials, if the necessary modifications are carried out. Classic processes ...
  • Biografting of ferulic acid onto lignocellulosic fibers by the use of laccases 

    Rencoret, Jorge; Aracri, Elisabetta; Gutíerrez, Ana; del Rio Andrade, José Carlos; Torres López, Antonio Luis; Vidal Lluciá, Teresa; Martínez, Ángel T. (2014)
    Comunicació de congrés
    Accés restringit per política de l'editorial
    Laccases can functionalize paper pulps with phenolic compounds but little is known about the formed linkages. Treatment of a high-kappa sisal pulp with Trametes villosa laccase and ferulic acid resulted in strong increases ...
  • Photobleaching of eucalyptus kraft pulps. Thermogravimetric monitoring 

    Barneto, A. G.; Ariza, María; Vidal Lluciá, Teresa; Ariza, J. (2014)
    Comunicació de congrés
    Accés restringit per política de l'editorial
    This study assesses the potential of UV light as method to bleach eucalyptus pulps in different steps of their chemical bleaching process in a pulp mill. Higher brightness increasing were obtained on dirtier pulps, that ...
  • Xylanase treatment of eucalyptus pulps in different chemical bleaching stages 

    Ariza, María; Barneto, A. G.; Vidal Lluciá, Teresa; Ariza, J. (2014)
    Comunicació de congrés
    Accés restringit per política de l'editorial
    Xylanase significantly reduces the kappa number but almost not modifies brightness and viscosity in studied pulps. On average, xylanase decreases the kappa number of chemical pulps 25 %. This intense effect on the kappa ...

Mostra'n més