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Ara es mostren els items 9-28 de 132

    • An enzyme-catalysed bleaching treatment to meet dissolving pulp characteristics for cellulose derivatives applications 

      Quintana, Elisabet; Valls Vidal, Cristina; Vidal Lluciá, Teresa; Roncero Vivero, María Blanca (2013-11)
      Article
      Accés restringit per política de l'editorial
      Bleached cellulose with good end-properties (_90% ISO brightness and 62% cellulose preservation) was obtained by using a totally chlorine-free biobleaching process (TCF). Unbleached sulphite cellulose was treated with ...

    • Antioxidant activity of xylooligosaccharides produced from glucuronoxylan by Xyn10A and Xyn30D xylanases and eucalyptus autohydrolysates 

      Valls Vidal, Cristina; Pastor Blasco, Francisco Ignacio Javier; Vidal Lluciá, Teresa; Roncero Vivero, María Blanca; Diaz Lucea, M. Pilar; Martinez, Josefina; Valenzuela Mayorga, Susana Valeria (2018-08-15)
      Article
      Accés obert
      Antioxidant activity of xylooligosaccharides (XOS) released from beechwood and birchwood glucuronoxylans by two different xylanases, one from family GH10 (Xyn10A) and another from family GH30 (Xyn30D) was examined. The ...

    • 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 ...

    • Aprovechamiento de un residuo papelero para la obtención de nanocelulosa 

      Huete Matute, Noemi; Roncero Vivero, María Blanca (OmniaScience, 2021-02-01)
      Comunicació de congrés
      Accés obert
      La constante búsqueda de mejoras productivas en la industria papelera y la creciente concienciación de la sociedad por los problemas derivados del uso de materiales procedentes de la industria petroquímica, hace que ...

    • Assessing the environmental impact of biobleaching: effects of the operational conditions 

      Valls Vidal, Cristina; Quintana, Elisabet; Roncero Vivero, María Blanca (2012-01)
      Article
      Accés restringit per política de l'editorial
      The environmental impact of enzyme bleaching stages applied to oxygen-delignified eucalypt kraft pulp was assessed via the chemical oxygen demand (COD), color, absorbance spectrum, residual enzyme activity and Microtox ...

    • Assessing the enzymatic effects of cellulases and LPMO in improving mechanical fibrillation of cotton linters 

      Valls Vidal, Cristina; Pastor Blasco, Francisco Ignacio Javier; Roncero Vivero, María Blanca; Vidal Lluciá, Teresa; Diaz Lucea, M. Pilar; Martinez Soler, Josefina; Valenzuela, Susana V. (2019-06-26)
      Article
      Accés obert
      Background: The increasing interest in replacing petroleum-based products by more sustainable materials in the packaging sector gives relevance to cellulose as a biodegradable natural resource. Moreover, its properties can ...

    • Assessing the use of xylanase and laccases in biobleaching stages of a TCF sequence for flax pulp 

      Fillat Latorre, Amanda; Roncero Vivero, María Blanca; Vidal Lluciá, Teresa (2011-12)
      Article
      Accés restringit per política de l'editorial

    • Assessment of the potential of enzymes to produce dissolving pulps 

      Valls Vidal, Cristina; Quintana, Elisabet; Vidal Lluciá, Teresa; Roncero Vivero, María Blanca (Universidade de Aveiro, 2018)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      In this work, a totally chlorine free (TCF) sequence including a laccase-mediator system was developed in a softwood sulfite pulp. Then, purification was carried out employing strong alkaline extractions and hydrolytic ...

    • Bacterial cellulose for increasing barrier properties of paper products 

      Fillat Latorre, Amanda; Martinez, Josefina; Valls Vidal, Cristina; Cusola Aumedes, Oriol; Roncero Vivero, María Blanca; Vidal Lluciá, Teresa; Valenzuela, Susana V.; Diaz Lucea, M. Pilar; Pastor Blasco, Francisco Ignacio Javier (2018-08-07)
      Article
      Accés obert
      Bacterial cellulose was combined with wood cellulose papers in order to obtain biomaterials with increased barrier properties. For this purpose, different parameters were assessed: two producing bacterial strains ...

    • Bacterial cellulose matrices to develop enzymatically active paper 

      Buruaga Ramiro, Carolina; Valenzuela, Susana V.; Valls Vidal, Cristina; Roncero Vivero, María Blanca; Javier Pastor, F.I.; Diaz Lucea, M. Pilar; Martínez Martínez, Josefina (2020-01-31)
      Article
      Accés obert
      This work studies the suitability of bacterial cellulose (BC) matrices to prepare enzymatically active nanocomposites, in a framework of more environmentally friendly methodologies. After BC production and purification, ...

    • Bacterial cellulose-chitosan paper with antimicrobial and antioxidant activities 

      Cabañas Romero, L. Verónica; Valls Vidal, Cristina; Valenzuela, Susana V.; Roncero Vivero, María Blanca; Javier Pastor, F.I.; Diaz Lucea, M. Pilar; Martínez Martínez, Josefina (2020-03-12)
      Article
      Accés obert
      The production of paper-based bacterial cellulose-chitosan (BC-Ch) nanocomposites was accomplished following two different approaches. In the first, BC paper sheets were produced and then immersed in an aqueous solution ...

    • Biobleaching of high quality pulps with laccase mediator system: influence of treatment time and oxygen supply 

      Fillat Latorre, Úrsula; Roncero Vivero, María Blanca (Elsevier, 2009)
      Article
      Accés obert
      In this study we examined the influence of the treatment time and addition of oxygen on the efficiency of a laccase mediator system (L) applied to flax pulp at atmospheric pressure. The redox potential and the dissolved ...

    • Biorefinery: the paper mill of tomorrow 

      Vidal Lluciá, Teresa; Torres López, Antonio Luis; Valls Vidal, Cristina; Cusola Aumedes, Oriol; Quintana, Elisabet; Andreu Terrén, Glòria; Aracri, Elisabetta; Fillat Latorre, Amanda; García Ubasart, Jordi; Beltramino, Facundo; Clemente Escuin, Antonio; Roncero Vivero, María Blanca (Campus de Terrassa de la UPC, 2013-06-13)
      Text en actes de congrés
      Accés obert

    • Bleached dissolving pulps applying laccase treatments 

      Quintana, Elisabet; Valls Vidal, Cristina; Roncero Vivero, María Blanca (2012)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      A biobleaching sequence, using a laccase enzyme (Trametes Villosa) in combination with different mediators, was applied to softwood dissolving cellulose in order to study its bleaching efficiency and its potential in terms ...

    • Breve estado del arte de la celulosa bacteriana y sus aplicaciones 

      Durango Giraldo, Geraldine; Valls Vidal, Cristina; Roncero Vivero, María Blanca (OmniaScience, 2024-01)
      Comunicació de congrés
      Accés obert
      La celulosa es un biopolímero, el cual constituye la pared celular de las plantas, junto con la lignina y la hemicelulosa. La celulosa también puede ser producida por microorganismo, tales como bacterias. Esta celulosa, ...

    • CARACTERITZACIÓ D' AIGÜES (Examen 1r quadrimestre, 2n parcial) 

      Escalas Cañellas, Antoni; Roncero Vivero, María Blanca (Universitat Politècnica de Catalunya, 2011-01-18)
      Examen
      Accés restringit a la comunitat UPC

    • Cellulose acetate films from chemo-enzymatic dissolving pulps 

      Quintana, Elisabet; Ago, Mariko; Valls Vidal, Cristina; Fernández Santos, Julia; Roncero Vivero, María Blanca; Rojas, Orlando J. (2022)
      Comunicació de congrés
      Accés obert
      The purpose of this work is to obtain dissolving cellulose fibers that are suitable for the manufacturing of cellulose derivatives. Therefore, the combination of enzymatic and chemical treatments during the bleaching stage ...

    • 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 ...