Mostrando ítems 21-40 de 51
Blancafort Jorquera, Miquel (Fecha de defensa: 2019-11-15)
The study of superfluid helium has been carried out mainly by physicists. In recent years, taking advantage of the potentialities presented by superfluid helium nanodroplets (HeNDs) as inert matrices at very low temperatures ...
Alonso Benito, Gerard (Fecha de defensa: 2019-11-29)
Two main topics are treated in this doctoral thesis from a theoretical and computational point of view: the gas capture and separation from post-combustion flue gases, and the enhanced oil recovery from oil reservoirs. The ...
Rius Ayra, Oriol (Fecha de defensa: 2019-10-30)
A la natura existeixen diferents animals o plantes com ara els sabaters (Gerris remigis), la flor de lotus (Nelumbo nucifera) o les fulles d’arròs (Oriza sativa) que presenten propietats extraordinàries com ara l’auto-neteja ...
Mamani Challapa, Verónica Lisbeth (Fecha de defensa: 2019-07-05)
Los sistemas de almacenamiento de energía termoquímica presentan la ventaja de usar materiales que almacenan una alta densidad energética por un tiempo ilimitado, características importantes para ser aprovechadas para ...
Calvo de la Rosa, Jaume (Fecha de defensa: 2019-10-25)
This doctoral Thesis has been focused on the preparation of magnetic materials by different methods, the characterization of their structural characteristics, and the understanding of their mechanical and magnetic properties. ...
Calderón Díaz, Alejandro (Fecha de defensa: 2019-10-24)
Renewable energies have a major role in today’s energy systems development, energy security and climate change fight. Thermal Concentrating Solar Power (CSP) has the potential to get up to 11.3% of world’s electricity ...
Pagès Casas, Josep M. (Fecha de defensa: 2019-07-19)
Particles dispersed in nematic liquid crystals (NLCs), also called nematic colloids, are nowadays typical experimental systems studied in the field of Soft Matter. In this scenario, the interactions and forces between ...
Prats Garcia, Hèctor (Fecha de defensa: 2019-03-25)
The research work presented in this thesis is divided in two main topics: gas separation and heterogeneous catalysis. Although the systems studied in one part and another are quite different, they share two fundamental ...
Francese, Tommaso (Fecha de defensa: 2019-03-25)
In this work, we characterized and studied the properties associated to DTA-based bistable organic molecular magnetic systems, namely PDTA and TDPDTA, respectively. In both cases, the low and high temperature phases have ...
Escobar Romero, Ana Maria (Fecha de defensa: 2018-12-09)
La modificació de les superfícies dels materials permet obtenir propietats diferents a les que presenta el substrat prèviament o preservar-lo del medi que l’envolta. Les tècniques emprades amb aquest objectiu són molt ...
Cuko, Andy (Fecha de defensa: 2018-09-24)
Properties of nanomaterials are known to be size dependent and generally are very different from those of the corresponding bulk. Such behaviour, which is strongly system and structure dependent, allows one to tune material’s ...
Mondelo-Martell, Manel (Fecha de defensa: 2018-06-18)
Quantum confinement effects, understood as the changes on the structure and dynamics of a molecule when it goes from a free environment to a cavity with some characteristic length of the order of the nanometer, represent ...
Posada Pérez, Sergio (Fecha de defensa: 2018-03-12)
Our society has a problem with the use of fossil fuels, due to the vast and exceeding emissions derived from human activities. Two ways could be consider to mitigate these harmful effects. On the one hand, the capture, ...
Gumí Audenis, Berta (Fecha de defensa: 2018-04-27)
Biological membranes (BMs) are self-sealing boundaries, which confine the permeability barriers of cells and organelles and provide the means to compartmentalize functions. Apart from being crucial for the cell structure, ...
Alcón Rovira, Isaac (Fecha de defensa: 2018-03-14)
In this PhD thesis I have studied through state-of-the-art quantum simulations (mainly within the density functional theory approach, DFT) triarylmethyl (TAM) based systems with potential for future nano-devices and designed ...
Pont Villanueva, Laura (Fecha de defensa: 2017-07-14)
Esta tesis doctoral se ha centrado en el desarrollo de metodologías analíticas adecuadas que permitan la separación, detección, caracterización e identificación de proteínas y metabolitos como biomarcadores de diferentes ...
Ozaeta Laverde, Pablo (Fecha de defensa: 2017-07-12)
Natural Gas with more than 80% methane has a liquefaction temperature around -165 ° C. Temperature at which the gas reduces its volume by a factor of 600/1. This operating temperature makes the use of ferritic materials ...
López Martínez, Montserrat (Fecha de defensa: 2017-09-26)
Electron Transfer (ET) plays essential roles in crucial biological processes such as cell respiration and photosynthesis. It takes place between redox proteins and in protein complexes that display an outstanding efficiency ...
Lamiel Garcia, Josep Oriol (Fecha de defensa: 2017-09-27)
En aquesta tesi s’han realitzat càlculs DFT per tal d’estudiar els sistemes TiO2 i ZnO i poder analitzar-ne les característiques de l’estructura electrònica, geometria i estabilitat energètica principalment. Primerament ...
Flores Tapia, Nelly Ester (Fecha de defensa: 2017-11-28)
La degradación individual de los ácidos trans-cinámico, trans-ferúlico y 4-hidroxifenilacético se llevó a cabo utilizando varios EAOPs. Se trataron disoluciones de 100 ml de cada ácido en Na2SO4 0,050 M a pH 3,0 y temperatura ...