Now showing items 13-29 of 29

    Enhancement of methane production from the anaerobic digestion of chemical pulp and paper mill effluents 

    Rodriguez-Chiang, Lourdes (Date of defense: 2018-05-04)

    Sustainability of resources such as energy, water and waste have become important drivers in our current economy. For large industries that are water and energy intensive like pulp and paper (P&P) mills, this is a specifically ...

    Hydrogen production from bioethanol using cobalt hydrotalcites 

    Espinal Bustos, Raúl Uziel (Date of defense: 2013-12-20)

    Hydrogen constitutes a promising alternative to manage our energy supply more efficiently. Hydrogen can be stored and used in fuel cells to produce electricity, where it combines with the oxygen present in the air and ...

    Impacte dels canvis anatòmics sobre la distribució de dosi en els pacients amb càncer de cap i coll tractats amb 3DCRT i IMRT 

    Beltrán Vilagrasa, Mercè (Date of defense: 2012-12-14)

    En aquesta tesi s’estudien les implicacions dosimètriques que comporten els canvis anatòmics que pateixen els pacients afectats de càncer de cap i coll (CCC) durant el tractament de radioteràpia (RT). L’estudi es realitza ...

    Improvement of early warning monitoring using gamma spectrometry 

    Camp Brunés, Anna (Date of defense: 2017-09-15)

    The present thesis is focused on the improvement of radiological surveillance networks using gamma spectrometry. Tipically they are equipped with gamma dose rate monitors, while they do not have gamma spectrometry monitors. ...

    Island-based polygeneration systems : feasibility of bBiomass-driven distributed concepts 

    Wegener, Moritz (Date of defense: 2021-02-12)

    The colossal risks and challenges posed by climate change require innovative solutions that must fulfil energy service demands sustainably. The concept of small-scale, biomass-based polygeneration (SBP) is one such ...

    Levels and behaviour of radionuclides in water treatment plants : the case of the Barcelona metropolitan area urban water cycle 

    Mulas, Dani (Date of defense: 2020-02-28)

    The Barcelona metropolitan area (BMA; 3.2 M inhabitants) has an integrated urban water cycle management. Different type of treatment plants are located along the drinking, sewerage and reuse networks where specific treatments ...

    Local optics corrections in the HL-LHC 

    Coello de Portugal - Martínez Vázquez, Jaime Maria (Date of defense: 2021-06-16)

    In order to increase the performance of particle colliders, it is crucial to make the beam sizes at the collision points as small as possible. This causes an increase of the beam size in the region surrounding the collision ...

    Neutron capture cross section measurement of the heaviest s-process branching 204Tl and of 203Tl at CERN n_TOF 

    Casanovas Hoste, Adrià (Date of defense: 2020-10-27)

    Neutron capture cross sections are fundamental in the study of the slow neutron capture process of nucleosynthesis, also known as the s-process, which produces half of the observed solar system abundances of elements heavier ...

    Neutron-induced fission cross section of 240,242Pu 

    Salvador Castiñeira, Paula (Date of defense: 2014-11-07)

    A recent sensitivity analysis done for the new generation of fast reactors [1] has shown the importance of improved cross section data for several actinides. Among them, the neutron-induced fission cross section of 240,242Pu ...

    On-site pure hydrogen production in a catalytic membrane reactor by ethanol steam reforming 

    Hedayati, Ali (Date of defense: 2016-09-26)

    Hydrogen is considered as a clean energy carrier that can be converted to electricity by fuel cell with high efficiency. To be economically feasible and comparable, hydrogen needs to be liquefied, compressed, or adsorbed ...

    Optimization of alpha emitter's determination in water. Behavior of radionuclides in water treatment plants 

    Montaña Guerra, Montserrat (Date of defense: 2013-07-24)

    La determinació de l’índex alfa total en aigües és d’interès per ser un dels paràmetres inclòs en la legislació nacional e internacional associada a la qualitat de l’aigua per al consum humà. Aquest índex informa de la ...

    Optimization of field matching in external photon beam radiation therapy 

    Hernández Masgrau, Víctor (Date of defense: 2013-11-07)

    Radiation therapy is one of the main modalities used for treating cancer patients, together with surgery and chemotherapy. Radiotherapy treatments can be carried out with a great variety of devices, but most treatments are ...

    Producción fotocatalítica de H2 con microrreactores y cristales fotónicos 

    Castedo Rodríguez, Alejandra (Date of defense: 2018-09-21)

    The depletion of fossil fuels and increase of global warming lead to a high demand for alternative energy sources that should be cheap and renewable to fulfill the future energy demand. The photocatalytic generation of H2 ...

    Quantification of dopaminergic neurotransmission SPECT studies with 123 l-labelled radioligands 

    Gallego Blanco, Judith (Date of defense: 2016-02-02)

    Dopaminergic neurotransmission SPECT studies with 123I-labelled radioligands can help in the diagnosis of neurological and psychiatric disorders such as Parkinson¿s disease and schizophrenia. Nowadays, interpretation of ...

    Solar fuels via two-step thermochemical redox cycles for power and fuel production 

    Uddin, Azhar (Date of defense: 2019-07-23)

    With the issue of the rise of anthropogenic CO2, global warming and rise of the primary energy demand, strong measures for the energy transition and the diversification with renewables and existing fossil-based infrastructure ...

    Study of a Compton camera based on CsI(Tl) scintillator bars for radiological environmental imaging 

    Rodríguez, María D. (Date of defense: 2020-10-26)

    Compton cameras are used for radiological imaging, which can be useful in environmental applications and especially in determining the position of hidden sources. Current Compton cameras are based on pixelated detectors ...

    Valorization of low concentration sugar side-stream from dissolving pulp production 

    Gómez Millán, Gerardo (Date of defense: 2019-12-16)

    Among the platform chemicals that can be produced from lignocellulosic biomass, furfural (FUR) constitutes a promising intermediate that can be processed into a variety of advanced end products. In this thesis, the ...