Ara es mostren els items 19-38 de 93

    • Cellulose oxidation by Laccase-TEMPO treatments 

      Quintana, Elisabet; Roncero Vivero, María Blanca; Vidal Lluciá, Teresa; Valls Vidal, Cristina (2017-02-10)
      Article
      Accés obert
      In this work, laccase-TEMPO (Lac-T) treatments were applied to bleached commercial dissolving pulp in order to introduce carbonyl and carboxyl groups, which were found to improve dry and wet strength-related properties. ...
    • Coating of laccase-activated phenols for the industrially-feasible functionalization of cellulose-based substrates 

      Cusola Aumedes, Oriol; Valls Vidal, Cristina; Vidal Lluciá, Teresa; Roncero Vivero, María Blanca (2014)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      The present work describes an innovative method for the hydrophobization of cellulosic material by impregnation with an enzymatically obtained functionalization solution (FS). Application of FS to the surface of previously ...
    • Comparative evaluation of the action of two different endoglucanases. Part I: on a fully bleached, commercial acid sulfite dissolving pulp 

      Quintana, Elisabet; Valls Vidal, Cristina; Vidal Lluciá, Teresa; Roncero Vivero, María Blanca (2015-04-19)
      Article
      Accés obert
      A fully bleached commercial acid dissolving pulp was treated with two endoglucanases, one obtained from Paenibacillus barcinonensis (B) and the other one produced from Cerrena unicolor (F) with the intention to improve ...
    • Comparative evaluation of the action of two different endoglucanases. Part II: on a biobleached acid sulphite pulp 

      Quintana, Elisabet; Valls Vidal, Cristina; Vidal Lluciá, Teresa; Roncero Vivero, María Blanca (2015-04-30)
      Article
      Accés obert
      A TCF sulphite pulp, bleached at the laboratory scale with a laccase–violuric acid system and complemented with a pressurized hydrogen peroxide stage, was treated with two endoglucanases, one obtained from Paenibacillus ...
    • Conferring antioxidant capacity to cellulose based materials by using enzymatically-modified products 

      Cusola Aumedes, Oriol; Valls Vidal, Cristina; Vidal Lluciá, Teresa; Roncero Vivero, María Blanca (2015-05-30)
      Article
      Accés obert
      A new, industrially feasible method for conferring cellulosic substrates antioxidant properties by using enzymatic products was developed. The method allows cellulose surfaces such as those of paper sheets to be conferred ...
    • 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 ...
    • 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 ...
    • 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, ...
    • Effectiveness of novel xylanases belonging to different GH families on lignin and hexenuronic acids removal from specialty sisal fibres 

      Valenzuela Mayorga, Susana Valeria; Valls Vidal, Cristina; Roncero Vivero, María Blanca; Vidal Lluciá, Teresa; Díaz Lucea, Pilar; Pastor Blasco, Francisco Ignacio Javier (2014)
      Article
      Accés restringit per política de l'editorial
      Background: The effectiveness of xylanases on lignin removal from pulps differs widely depending on the enzyme family, the type of pulp and the bleaching sequence among other factors. Xylanases can also reduce the presence ...
    • 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 ...
    • Electrochemical insights on the hydrophobicity of cellulose substrates imparted by the enzymatically-oxidized gallates with increasing alkyl chain length 

      Cusola Aumedes, Oriol; Valls Vidal, Cristina; Vidal Lluciá, Teresa; Tzanov, Tzanko; Roncero Vivero, María Blanca (2015-06-09)
      Article
      Accés obert
      In this work, we studied the influence of the alkyl chain length in enzymatically-oxidized gallates on the development of hydrophobicity on paper-based materials, and further correlated the obtained effect to the redox ...
    • Elucidating the chemical nature of laccase-modified alkyl gallates 

      Cusola Aumedes, Oriol; Valls Vidal, Cristina; Vidal Lluciá, Teresa; Roncero Vivero, María Blanca (2020-06-12)
      Article
      Accés obert
      In the first part of the present work, relevant findings concerning the laccase (Lacc) activation of alkyl gallates, and its implementation in developing hydrophobic properties on cellulose-based substrates are reported. ...
    • 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)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      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 ...
    • Elucidating the effects of laccase-modifying compounds treatments on bast and core fibers in flax pulp 

      Fillat Latorre, Amanda; Roncero Vivero, María Blanca; Vidal Lluciá, Teresa (2012-01)
      Article
      Accés restringit per política de l'editorial
      Laccases in combination with various chemical compounds have been tested with a view to obtain environmental friendly, high-value paper products from unbleached flax pulp, which is currently being assessed as a raw material ...
    • 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 ...
    • Enhanced fully cellulose based forward and reverse blood typing assay 

      Casals Terré, Jasmina; Farré Lladós, Josep; López Martínez, Joan Antoni; Vidal Lluciá, Teresa; Roncero Vivero, María Blanca (2019-05-07)
      Article
      Accés obert
      This study presents an enhanced paper-based analytical device (PAD) for forward and reverse group blood typing. The proposed PAD uses a novel methodology, which provides highly reliable results on a fully cellulose based ...
    • 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 ...
    • Enzymatic strategies to improve removal of hexenuronic acids and lignin from cellulosic fibers 

      Valls Vidal, Cristina; Vidal Lluciá, Teresa; Roncero Vivero, María Blanca (2014)
      Article
      Accés restringit per política de l'editorial
      Different enzymatic strategies were applied to improve lignin and hexenuronic acid (HexA) removal. Three laccases (L) with different redox potentials were applied in combination with 1-hydroxybenzotriazole or methyl syringate ...
    • Enzymatic treatments of pulp using laccase and hydrophobic compounds 

      García Ubasart, Jordi; Esteban, Alberto; Vila Babarro, Carlos; Roncero Vivero, María Blanca; Colom Pastor, José F.; Vidal Lluciá, Teresa (2011-02)
      Article
      Accés restringit per política de l'editorial
      The aim of this work was to develop an innovative method for the internal sizing of paper by use of laccase and hydrophobic compounds. Nine different products containing hydrophobic moieties were tested in combination ...
    • Enzymatic treatments of pulp using laccase and hydrophobic compounds 

      García Ubasart, Jordi; Esteban, Alberto; Vila Babarro, Carlos; Roncero Vivero, María Blanca; Colom Pastor, José F.; Vidal Lluciá, Teresa (2011-09-01)
      Article
      Accés restringit per política de l'editorial