Bacteriospermia and porcine reproduction: effects on sperm quality and fertility potential of boar spermatozoa 

    Sepúlveda, Lilian (Fecha de defensa: 2016-09-30)

    Boar semen is not collected under sterile conditions,so boar ejaculates are commonly contaminated with a broad range of microorganisms, which may affect sperm quality and lead to a low reproductive performance and severe ...

    Barcelona y el turismo coreano. Un análisis a través de los medios de comunicación coreanos 

    Kang, Sin Gyu (Fecha de defensa: 2022-02-07)

    The Spanish Tourism Office pointed out in 2012 that between 40,000 and 50,000 South Koreans had traveled to Spain. This figure, validated by the National Institute of Statistics (INE) reflects that in nine years the ...

    Basin-scale hydrodynamics in a Mediterranean reservoir. Implications for the phytoplankton dynamics 

    Vidal Hurtado, Javier (Fecha de defensa: 2007-04-27)

    Procesos hidrodinámicos determinan, en un alto grado la calidad del agua en embalse, sin embargo dichos procesos han sido tradicionalmente olvidados en la gestión de embalse. En esta tesis se presentan evidencias de los ...

    Basis set superposition error effects, excited-state potential energy surface and photodynamics of thymine 

    Asturiol Bofill, David (Fecha de defensa: 2010-02-05)

    En aquesta tesi he estudiat l'efecte de l'error de superposició de base (BSSE) en la planaritat d'algunes molècules. He observat que l'ús d'alguns mètodes de càlcul amb determinades funcions de base descriuen mínims d'energia ...

    Benestar i acolliment d'infants en família extensa: percepcions, avaluacions i aspiracions dels principals agents implicats 

    Montserrat Boada, Carme (Fecha de defensa: 2006-09-04)

    La importància que els acolliments en família extensa han assolit en la darrera dècada dins dels sistemes de protecció infantil en la major part dels països occidentals, contrasta tant amb l'escassa i recent investigació ...

    Bereavement and addiction: complicated grief symptoms, psychopathology and associated variables in a substance use disorder sample 

    Masferrer Boix, Laura (Fecha de defensa: 2017-12-01)

    The loss of a loved one is a universal experience to which the majority of people adjust adequately. A substantial minority do not allow the natural process and, despite the passing of time, they continue to live with great ...

    Beyond trust. Using fuzzy contextual filters for reliability assessment in multi agent systems 

    Acebo Peña, Esteve del (Fecha de defensa: 2011-05-27)

    Trust modeling is widely recognized as an aspect of essential importance in the construction of agents and multi agent systems (MAS). As a consequence, several trust formalisms have been proposed over the last years. All ...

    Bienestar subjetivo en niños, niñas y adolescentes que participan en programas públicos después de clases en Chile 

    Ditzel, Ana Loreto (Fecha de defensa: 2022-06-07)

    This doctoral thesis aims to explore different aspects of the subjective well-being of children living in conditions of social vulnerability and participating in after-school programs in Chile. To this end, an investigation ...

    Bienestar subjetivo y satisfacción escolar en la adolescencia 

    Luna Soca, Francisco Javier (Fecha de defensa: 2013-02-01)

    The main objective of this research is to explore the relationship between the subjective well-being and a set of school factors that characterize both the functioning of the classroom and the school, and the academic ...

    Bienestar subjetivo, psicopatología y desempeño en matemáticas en adolescentes 

    Rubio Rivera, Andrés (Fecha de defensa: 2020-07-17)

    The present investigation is made up of two studies. Study 1 has as general objectives (1) to know the prevalence of the risk of psychopathology in adolescents, (2) to analyze the levels of subjective well-being and risk ...

    Bioelectrochemical systems for ammonium removal in contaminated water 

    Osset Álvarez, Miguel (Fecha de defensa: 2023-03-08)

    Summary Nowadays, ammonium (NH4+) is a pollutant present in all kinds of water bodies, leading to multiple environmental and health issues. The current NH4+-removing technologies are very expensive, as they require a lot ...

    Bioelectrochemical transformation of carbon dioxide to target compounds through microbial electrosynthesis 

    Batlle Vilanova, Pau (Fecha de defensa: 2016-11-25)

    In 2015 the average concentration of CO2 in the atmosphere exceeded 400 ppm. Some technologies, including CO2 capture and storage, are palliative. However, the development of alternatives to burning of fossil fuels focuses ...

    Bioenergetics mechanism and autophagy in breast cancer stem cells 

    Cufí González, Sílvia (Fecha de defensa: 2015-05-22)

    Aquest és el primer informe que demostra que l'autofàgia està mecànicament vinculat al manteniment de les cèl•lules tumorals que expressen alts nivells de CD44 i baixos nivells de CD24, que són típics de les cèl•lules mare ...

    Biofilm responses to flow intermittency in Mediterranean rivers 

    Colls Lozano, Miriam (Fecha de defensa: 2020-07-31)

    Currently, global change is promoting the spatiotemporal occurrence of temporary streams, altering fluvial ecosystem function and structure, and the ecosystem services they provide. To effectively protect fluvial ecosystems, ...

    Biofilm responses to multiple stressors associated to global change in river ecosystems 

    Proia, Lorenzo (Fecha de defensa: 2012-07-20)

    The main goal of this thesis is to investigate the effects of consequences of global change on fluvial biofilms. To achieve this objective a multi-marker approach has been used at different experimental scales. Our results ...

    Bioinspired copper and nonheme iron models for oxygen activation: unprecedented reactivities 

    Serrano Plana, Joan (Fecha de defensa: 2016-07-26)

    The oxidation of hydrocarbons is one of the most important processes in the chemical industry, and it is often related to highly toxic reagents that generate a big amount of undesired residues. In sharp contrast, oxygenase ...

    Bioinspired iron and manganese catalysts for the effective and selective oxidation of alkanes and alkenes 

    Gómez Martín, Laura (Fecha de defensa: 2010-06-04)

    La gran eficiència, selectivitat i les condicions suaus exhibides per les reaccions que tenen lloc al centre actiu de les metal·looxigenases són la font d'inspiració per la present dissertació. Amb l'objectiu de dissenyar ...

    Bioinspired iron models: from diiron complexes to supramolecular functionalized metallocavitands 

    Vidal Sánchez, Diego (Fecha de defensa: 2019-07-24)

    The oxidation of hydrocarbons under soft and selective conditions is a reaction almost exclusively produced under these conditions by enzymes. A lot of these enzymes, posses iron in their metal center, responsible for the ...

    Bioinspired ligands and model substrates for the mechanistic elucidation of oxygen activation and cross-coupling reactions mediated by first-row transition metals 

    Magallón Gubau, Carla (Fecha de defensa: 2022-05-16)

    Nowadays, one of the main goals in organic chemistry and fine industry is the development of new synthetic methodologies for the preparation of life-relevant products in a sustainable manner. The use of first-row ...

    Bioinspired metal-based oxidants: selectivity in catalytic hydroxylation of aliphatic C-H bonds and insight into the reactivity of oxoiron species 

    Dantignana, Valeria (Fecha de defensa: 2020-12-03)

    Selective oxidation of C-H bonds is an important reaction, as it can disclose novel synthetic strategies to get functionalized products through efficient paths. Nonetheless, due to the inert character of C-H bonds, the use ...