Ponències/Comunicacions de congressos
Recent Submissions
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SOC and diffusion rate estimation in redox flow batteries: An I&I-based high-gain observer approach
(2021)
Conference report
Open AccessThis paper presents an adaptive non-linear observer for the state of charge estimation in vanadium redox flow batteries. The study is based directly on the use of non-linear equations that describe the evolution of the ... -
Flow controlling tuning for the voltage of a redox flow battery considering the effect of overpotentials
(Institute of Electrical and Electronics Engineers (IEEE), 2021)
Conference report
Open AccessThis conference paper presents a comparison between a H8 control technique and a classical PID, applied on a redox flow battery system. The study presents a dynamic nonlinear electrochemical model that considers the effect ... -
Potencial de la celulosa en la construcción de nuevos materiales
(2019)
Conference report
Open AccessActualmente, más de una tercera parte de los tipos de papeles que hoy empleamos son para nuevos usos que hace diez años no existían. Además, la demanda creciente de productos basados en materias primas renovables y la ... -
Elucidating the chemical nature of laccase-modified alkyl gallates
(Universidade de Aveiro, 2018)
Conference lecture
Restricted access - publisher's policyIn 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 ... -
Assessment of the potential of enzymes to produce dissolving pulps
(Universidade de Aveiro, 2018)
Conference lecture
Restricted access - publisher's policyIn 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 ... -
Developing antioxidant capacity to cellulose-based materials by using enzymatically-modified products
(2015)
Conference lecture
Restricted access - publisher's policyIn 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
(2015)
Conference lecture
Restricted access - publisher's policyIn 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
(2015)
Conference lecture
Restricted access - publisher's policyIn 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
(2014)
Conference report
Open AccessA 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
(2014)
Conference lecture
Restricted access - publisher's policyThe 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?
(2014)
Conference lecture
Restricted access - publisher's policyThe 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
(2014)
Conference lecture
Restricted access - publisher's policyModifying 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 ...
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