CIPAGRAF - Grup de Recerca Paperer i Gràfic: Enviaments recents

Ara es mostren els items 1-12 de 50

    • Laccase-mediated coupling of nonpolar chains for the hydrophobization of lignocellulose 

      García Ubasart, Jordi; Vidal Lluciá, Teresa; Torres López, Antonio Luis; Rojas, Orlando J. (2013-04-09)
      Article
      Accés restringit per política de l'editorial
      We investigate the use of laccase enzymes to couple short nonpolar chains containing aromatic groups onto flax fibers and nanofibrillated cellulose (NFC) with different lignin contents. Trametes villosa, Pycnoporus ...

    • Biomodification of cellulose flax fibers by a new cellulase 

      García Ubasart, Jordi; Torres López, Antonio Luis; Vila, Carlos; Pastor, Francisco J.; Vidal Lluciá, Teresa (2013-01)
      Article
      Accés restringit per política de l'editorial
      The potential of the new cellulase Cel9B from Paenibacillus barcinonensis for the modification of cellulose flax fibers was for the first time assessed in this work. Cel9B treatments were found to enhance the development ...

    • Effect of commercial xylanases applied at extreme conditions in a eucalyptus pulp mill 

      Fillat Latorre, Úrsula; Roncero Vivero, María Blanca; Bassa, Alexandre; Sacón, Vera Maria (2012-10)
      Article
      Accés restringit per política de l'editorial
      In this study, we examined the effect of treating eucalyptus pulp with various commercial xylanases to identify the most effective enzyme for use under the industrial bleaching conditions used at the Jacareí mill of the ...

    • Laccase for biobleaching of eucalypt kraft pulp by means of a modified industrial bleaching sequence 

      Moldes, Diego; Vidal Lluciá, Teresa (2012-09)
      Article
      Accés restringit per política de l'editorial
      Biobleaching of kraft pulp is a possible application of laccase, but it has not been described in detail for complete industrial bleaching sequences yet. Therefore, in this work, the biobleaching of Eucalyptus globulus ...

    • Effect of residual lignin and heteropolysaccharides in nanofibrillar cellulose and nanopaper from wood fibers 

      Ferrer Carrera, Ana; Quintana, Elisabet; Filpponen, Ilari; Solala, Iina; Vidal Lluciá, Teresa; Rodríguez Pascual, Alejandro; Laine, Janne; Rojas, Orlando J. (2012-12)
      Article
      Accés restringit per política de l'editorial
      Unbleached (UN), oxygen-delignified and fully-bleached (FB) birch fibers with a residual lignin content of ca. 3, 2 and\1 %, respectively, were used to produce nanofibrillated cellulose (NFC) and nanopaper by using an ...

    • A new approach to the internal sizing of paper via biotechnological processes 

      García Ubasart, Jordi; Roncero Vivero, María Blanca; Vidal Lluciá, Teresa (2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This work deals with the study of a new biotechnological procedure, employing laccase in combination with hydrophobic compounds, for the biomodification of fibres and the internal sizing of paper. Cellulose fibres from ...

    • Effect of the laccase mediator system on the fibre properties of TCF bleached kraft pulp 

      Cadena Chamorro, Edith Marleny; Cusola Aumedes, Oriol; Vidal Lluciá, Teresa; Torres López, Antonio Luis (2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The application of the laccase mediator system (L stage) to TCF bleached pulp from Eucalyptus globulus with a low residual lignin content provides useful information about its effect in the hexenuronic acids content, ...

    • Cyclodextrin functionalization of several cellulosic substrates for prolonged release of antibacterial agents 

      Cusola Aumedes, Oriol; Tabary, Nicolas; Naceur Belgacem, Mohamed; Bras, Julien (Wiley InterScience, 2012-11-13)
      Article
      Accés restringit per política de l'editorial
      Several cellulosic substrates have been surface-functionalized with cyclomaltoheptaose (b-cyclodextrin, b-CD) using citric acid as a crosslinker agent to obtain new surface-modified materials able to release antiseptic ...

    • Application of surface enzyme treatments using laccase and a hydrophobic compound to paper-based media 

      Cusola Aumedes, Oriol; Valls Vidal, Cristina; Vidal Lluciá, Teresa; Roncero Vivero, María Blanca (2013-01-11)
      Article
      Accés restringit per política de l'editorial
      A new approach for the hydrophobization of finished cellulosic substrates based on a previously reported enzymatic technique is proposed. Commercial finished paper was hydrophobized by using laccase from Trametes villosa ...

    • Laccase from Pycnoporus cinnabarinus and phenolic compounds: can the efficiency of an enzyme mediator for delignifying kenaf pulp be predicted? 

      Andreu Terrén, Glòria; Vidal Lluciá, Teresa (2012-03)
      Article
      Accés restringit per política de l'editorial
      In this work, kenaf pulp was delignified by using laccase in combination with various redox mediators and the efficiency of the different laccase–mediator systems assessed in terms of the changes in pulp properties after ...

    • Enzymatic grafting of natural phenols to flax fibres: development of antimicrobial properties 

      Fillat Latorre, Amanda; Gallardo Román, Óscar; Vidal Lluciá, Teresa; Pastor Blasco, Francisco I. Javier; Díaz Lucea, Pilar; Roncero Vivero, María Blanca (2012-01-04)
      Article
      Accés restringit per política de l'editorial
      Unbleached flax fibres for paper production were treated with laccase from Pycnoporus cinnabarinus and low molecular weight phenols (syringaldehyde – SA, acetosyringone – AS and p-coumaric acid – PCA) to evaluate the ...

    • Use of cyclic voltammetry as an effective tool for selecting effcient enhancers for oxidative bioprocesses: importance of pH 

      Aracri, Elisabetta; Tzanov, Tzanko; Vidal Lluciá, Teresa (American Chemical Society (ACS), 2013-01-04)
      Article
      Accés restringit per política de l'editorial
      Seven natural phenols and two synthetic compounds were evaluated by means of cyclic voltammetry as enhancers for the oxidation of the lignin model compound veratryl alcohol (VAl) and a sulfonated lignin (SL). Their ...