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Ara es mostren els items 17-36 de 134

    • 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 ...

    • 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 ...

    • Composites of cellulose nanocrystals in combination with either cellulose nanofibril or carboxymethylcellulose as functional packaging films 

      Fernández Santos, Julia; Valls Vidal, Cristina; Cusola Aumedes, Oriol; Roncero Vivero, María Blanca (Elsevier, 2022-06-30)
      Article
      Accés obert
      Cellulose nanocrystals (CNC) were mixed with either cellulose nanofibril (CNF) or carboxymethylcellulose (CMC) in variable proportions (0/100, 20/80, 40/60, 50/50, 60/40, 80/20 and 100/0) to obtain cast films with acceptable ...

    • 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 ...

    • Decoloració de paper reciclat mitjançant processos biotecnològics 

      Valls Vidal, Cristina; Cusola Aumedes, Oriol; Roncero Vivero, María Blanca (OmniaScience, 2020-01-31)
      Text en actes de congrés
      Accés obert
      En aquest treball es proposa una nova seqüència biotecnològica per decolorar papers de color (vermell i negre). Per a aquest propòsit, s’utilitzen enzims del tipus lacasa en combinació amb mediadors naturals. Les propietats ...

    • 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 ...

    • Development of advanced and multifunctional biomaterials from two- or three-dimensional structures of cellulose 

      Durango Giraldo, Geraldine; Valls Vidal, Cristina; Roncero Vivero, María Blanca (2023-05-17)
      Comunicació de congrés
      Accés obert

    • Development of an antimicrobial bioactive paper made from bacterial cellulose 

      Buruaga Ramiro, Carolina; Valenzuela, Susana V.; Valls Vidal, Cristina; Roncero Vivero, María Blanca; Javier Pastor, F.I.; Diaz Lucea, M. Pilar; Martinez Soler, Josefina (2020-09-01)
      Article
      Accés obert
      Bacterial cellulose (BC) has emerged as an attractive adsorptive material for antimicrobial agents due to its fine network structure, its large surface area, and its high porosity. In the present study, BC paper was first ...

    • Differential activity of lytic polysaccharide monooxygenases on celluloses of different crystallinity. Effectiveness in the sustainable production of cellulose nanofibrils 

      Valenzuela, Susana V.; Valls Vidal, Cristina; Schink, Viviane; Sanchez, Daniel; Roncero Vivero, María Blanca; Diaz Lucea, M. Pilar; Martinez, Josefina; Javier Pastor, F.I. (2019-03-01)
      Article
      Accés obert
      A series of cellulosic substrates has been produced, treated with lytic polysaccharide monooxygenase (LPMO) from Streptomyces ambofaciens (SamLPMO10C), and analyzed by high performance anion exchange chromatography (HPAEC) ...