Now showing items 81-100 of 155
Font Molins, Marc (Date of defense: 2015-02-13)
Aryl-Cu(III) species have been often implicated as the intermediate species that operate Ullmann-type couplings. However, such species have long remained elusive and the fundamental pathways that govern Ullmann-type ...
Soler Vives, Marta (Date of defense: 2015-02-02)
Nowadays, the search for new drugs against cancer is one of the major goals to improve the quality of life of patients. The development of more selective treatments against cancer cells may lead to a significant reduction ...
Valls Cantenys, Carme (Date of defense: 2014-11-21)
The presence of anthropogenic chemical substances in water resources can affect the ecological balance of aquatic systems, as well as human health, and therefore it is necessary to control their presence in water bodies. ...
Ruiz-Barragán, Sergi (Date of defense: 2014-09-19)
Conical Intersections (CI) are points in Potential Energy Surfaces (PES) of two or more states that have the same energy. They are fundamental to understand photo-chemical processes. These points are not isolated points, ...
Vilà Roura, Sílvia (Date of defense: 2014-07-28)
Les malalties causades per bacteris i fongs són responsables d’importants pèrdues econòmiques en cultius. Es considera que els pèptids antimicrobians, naturals i sintètics, són uns bons candidats per a ser utilitzats com ...
Parera Briansó, Magda (Date of defense: 2014-05-20)
The transition-metal catalysed [2+2+2] cycloaddition reaction is a highly efficient synthetic tool that allows six-membered polysubstituted carbo- and heterocyclic derivatives to be obtained in an atom economy process. ...
Godayol Boix, Anna (Date of defense: 2014-03-27)
Different analytical methodologies have been developed for the determination of odorous compounds and synthetic fragrances in water and air WWTP samples from Girona and Tarragona provinces. With regards to the odorous ...
Majumder, Santanu (Date of defense: 2013-10-30)
Apart from the geological controls that can cause As mobilization in groundwater in the Bengal Delta Plain, local anthropogenic factors may also contribute to some extent. Investigations showed that As(III) get enriched ...
Bhowmick, Subhamoy (Date of defense: 2013-10-31)
Arsenic (As) is one of the common cancers causing contaminant in groundwater of West Bengal, India along with other regions of the world. Scientists believe that As contamination in groundwater of these region are because ...
El Hamdi Lahfid, Majid (Date of defense: 2013-10-15)
Structural isomers are molecules that have the same number and type of atoms but arranged in different manner. The isomerization energy is the energy difference between two isomers, i.e. the energy cost corresponding to ...
Prat Casellas, Irene (Date of defense: 2013-06-14)
The functionalization of hydrocarbons in a sustainable manner is one of the main challenges for chemists. Their abundance in nature as natural gas or crude oil makes them the most convenient chemical feedstock. The oxidation ...
Alonso Roura, Mònica (Date of defense: 2012-12-14)
Hippocrates predicted many years ago that breath could tell something related with our health. On his treaties, he indicated that when the body starts moving after sleeping, and breathe with more frequency, something hot ...
Sagristà i Puig, Ester (Date of defense: 2012-11-23)
Extensive amounts of pharmaceuticals and personal care products (organic emerging pollutants) are introduced into the environment mainly through wastewater treatment plants discharges either effluent wastewater reaching ...
Luis Luis, Josep Maria (Date of defense: 1999-06-28)
The vibrational contribution to nonlinear optics (NLO) properties is the mean goal of study of this Thesis. The vibrational contribution can be split in the nuclear relaxation contribution and the curvature contribution. ...
Costas Salgueiro, Miquel (Date of defense: 1999-02-26)
This thesis is organized in seven independent chapters: I) a description of the structure and reactivity of the metalloproteins of copper and iron which deal with the oxygen processing into living organisms; II) an study ...
Sánchez Navarro, Juan Manuel (Date of defense: 1999-03-17)
For the selective separation of Noble Metals, different new chelating polymers with the same functional group, based on tri-isobutylphosphine sulphide, have been synthesised. Different spacers between the polymeric matrix ...
Planas i Grabuleda, Marta (Date of defense: 1996-03-15)
Spiro-γ-lactones are widely distributed among natural products, several of them being well known by their interesting biological activities. We describe herein the synthesis of 1-oxaspiro[4.4]nonan derivatives and ...
Heras i Corominas, Montserrat (Date of defense: 1999-07-27)
According to a strategy based on an Aza-Wittig reaction type, an efficient methodology in solution toward the synthesis of libraries of 2-aminoimidazolones with high molecular diversity has been developed. The strategy is ...
Iglesias Juncà, Mònica (Date of defense: 2000-03-03)
The present study focuses on the characterization of solid-liquid extraction techniques for the separation and preconcentration of rare-earth elements and precious metals. We developed an impregnated resin with di ...
Rodríguez Pizarro, Montserrat (Date of defense: 2000-06-20)
This doctoral dissertation is divided in two different parts. The first one deals with copper complexes and their magnetic properties. The second one describes the synthesis and characterization of a new family of ruthenium ...