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Now showing items 20657-20676 of 41648
Hydrodynamics and geochemistry at multiple scales : characterizing preferential flow-paths and wormholes in evaporitic sediments
The characterization of evaporitic aquifers for a better understanding of hydrodynamics and geochemical processes is of great importance, especially in environments where both the sustainability of unique ecosystems and ...
Hydrodynamics of flat plates in cross-flow near the free surface
Aquesta tesi presenta els resultats d'un estudi realitzat per comprendre l'efecte de la superfície lliure sobre les forces generades per una placa plana que es mou en un fluid estacionari, de manera que la superfície de ...
Hydrodynamics of pitching foils: flexibility and ground effects
En termes de propulsió la rigidesa flexural i l'efecte terra en una placa rectangular en piteig pur han estat investigats. Velocimetria per imatges per partícules, mesures de forces i moments amb una cèl·lula de carga de ...
The Hydroformylation Reaction: from Covalent to Supramolecular Approaches and Operando Kinetic Studies
S’ha estudiat la hidrofomilació d΄al·lens 1,1΄-disubstituïts catalitzada per rodi, emprant lligands de tipus bisfosfit amb un centre de regulació allunyat del centre catalític. L'ús de sals de metalls alcalins de BArF com ...
Hydrogel co-networks of gelatin methacryloyl and poly(ethylene glycol)diacrylate sustain 3D functional in vitro models of intestinal mucosa
Conventional in vitro cell culture models do not possess the complexity that the native tissues offer. Because of this, the functional properties of the tissues are not properly mimicked, which causes poorly predictive ...
Hydrogels based on short amphipathic peptides: self-assembly studies and apllications
I. Tema y objetivos de la tesis Debido a la estrecha relación entre el auto-ensamblaje de péptidos y proteínas con las enfermedades de tipo amiloide,(1) entender los principios que gobiernan este fenómeno resulta de ...
Hydrogen production from bioethanol using cobalt hydrotalcites
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 ...
Hydrogen production from wastewater in single chamber microbial electrolysis cells: studies towards its scaling-up
Les cel·les microbianes d’electròlisi (MEC) són sistemes biocatalitzats que ofereixen la possibilitat de valoritzar aigües residuals produint hidrogen, el qual és un bon vector energètic i un reactiu àmpliament utilitzat ...
HYDROGENOLYSIS OF GLYCEROL OVER NI-BASED CATALYSTS
La demanda de energía en el mundo va en aumento año a año. Los sistemas de producción y patrones de consumo actuales son insostenibles. Existe la necesidad de desarrollar nuevas formas de satisfacer no sólo, la demanda de ...
A hydrogeological approach in urban underground infrastructures
The competition for space in urban areas due to an exponential growth of population makes derground engineering plays a crucial role in the development of cities. Urban underground infrastructures deal with variables such ...
Hydrogeology of salt flats : the Salar de Atacama example
This thesis aims to advance the knowledge of the hydrogeological functioning of salt flats in order to achieve a sustainable management of their mineral resources and ecosystems. Salt flats are a major source of Li, B, I, ...
Hydrogeophysics as a multidisciplinary tool on aquifer appraisal: Focus on AMT capabilities
The shallow subsurface of the earth is an extremely important geological zone that yields much of our water resources, supports our agriculture and ecosystems. Safe and effective management of our natural resources is a ...
Hydrological alteration, critical swimming speed and life history in inland fish
Fresh waters are among the most biodiverse ecosystems globally but, at the same time, also the most threatened. Serious threats to freshwater ecosystems are, for example, habitat alteration, invasive alien species and ...
Hydrolysates and peptides from chicken foot proteins to manage hypertension
La hipertensió arterial es considera un dels problemes de salut pública més importants en la nostra societat. El tractament d’aquesta patologia es basa en una combinació de canvis en l’estil de vida i tractament farmacològic. ...
Hydrolysis of the trifluoromethyl group in triarylphosphines: scope of the reaction in the preparation of carboxylic-trifluoromethylated phosphines and their applications
La present tesi descriu la preparació d’una nova família de fosfines carboxíliques-trifluorometilades. Aquests lligands han sigut sintetitzats mitjançant la reacció d’hidròlisi del grup trifluorometil en triarilfosfines ...
Hydrometeorological and climatic control over lake phytoplankton: the importance of time scales
In the present thesis we focus on the two extremes of the wind speed – storms and atmospheric stilling – and analyse their impacts on lake environments and phytoplankton dynamics over short and long periods. As we realised ...
Hydropower and ecological conflicts. From resistance to transformations
El sector hidroeléctrico está pasando por una fase de expansión a nivel global, siendo promovido como una fuente de energía sostenible y renovable. Sin embargo, la construción de represas está causando un creciente número ...
Hydrotalcite-like compounds for the valorisation of renewable feedstocks
Como consecuencia de una demanda energética creciente, en los últimos años se ha incrementado la producción de biodiesel generándose un exceso de producción de glicerol y provocando que su precio disminuya considerablemente. ...
Hydroxyapatite-based materials for smart antitumor drug delivery systems, endocytic pathways and endosomal trafficking : polymers and biopolymers
Development of new drug molecule is expensive and time consuming. Improving safety efficacy ratio of “old” drugs has been attempted using different methods such as individualizing drug therapy, dose titration, and therapeutic ...
Hydroxypropyl Cellulose as Enabling Material for the Nanofabrication of Photonic Architectures
La creixent preocupació per l’impacte mediambiental i la sostenibilitat de les activitats humanes ha comportat un renovat interès per l’ús de materials d’origen natural. En aquest marc, la cel·lulosa, el polímer més abundant ...
