Browsing Departament de Química by Date of defense

Síntesi i reactivitat de nous macrocicles nitrogenats poliinsaturats

González Molina, Iván (Date of defense: 2008-12-19)

En aquesta tesi s'han sintetitzat macrocicles nitrogenats poliinsaturats de diferents mides i s'ha estudiat la seva reactivitat. <br/>S'han preparat macrocicles de quinze i setze baules triacetilènics i de quinze baules ...

Síntesi i caracterització de nous complexos de ruteni contenint lligands quirals. Aplicacions en catàlisi asimètrica

Serrano Núñez, Isabel (Date of defense: 2009-01-23)

La Tesis describe una serie de complejos de Rutenio conteniendo ligandos quirales y su aplicación en catálisis asimétrica. <br/><br/>Por un lado se describe el complejo [RuCl(bpea)((S)-BINAP)](BF4), donde (S)-BINAP es una ...

Theoretical study of reactivity and dynamics of hybride-bridged diruthenium complexes and silylium

Tussupbayev, Samat (Date of defense: 2009-02-26)

Esta tesis presenta un estudio computacional de los sistemas con hidruros puente. En la primera parte se estudia la química de complejos de dirutenio con cuatro hidruros puente. Esto incluye las siguientes reacciones: el ...

Síntesi de base sòlida de pèptids biarílics contenint 5-arilhistidines

Cerezo Frias, Vanessa (Date of defense: 2009-05-28)

Els aminoàcids biarílics es troben en una àmplia varietat de pèptids naturals amb important activitat biològica. Concretament, les arilhistidines formen part de les aciculitines, pèptids amb activitat citotòxica i antifúngica, ...

Síntesi de nucleopèptids en fase sòlida, i de derivats de Pantocina B

Mejias Ruiz, Francesc Xavier (Date of defense: 2010-06-04)

La tesis doctoral está dividida en 3 partes:<br/>La primera presenta la aplicación del grupo TCP a la síntesis de PNAs en fase sólida. La segunda está dedicada a la síntesis de un nuevo tipo de nucleoaminácido para la ...

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

Gómez Martín, Laura (Date of defense: 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 ...

Design and synthesis of short antimicrobial peptides for plant protection. Study of their mode of action

Ferre Malagon, Rafael (Date of defense: 2010-07-23)

Aquesta tesi doctoral està basada en el desenvolupament de nous agents antimicrobians derivats del pèptid híbrid cecropina A-melitina WKLFKKILKVL-NH2 (Pep3) que siguin sostenibles i útils per al control de malalties de ...

Analysis of chemical bonding and aromaticity from electronic delocalization descriptors

Feixas Geronès, Ferran (Date of defense: 2011-02-04)

Interactions between electrons determine the structure and properties of matter from molecules to solids. Therefore, the understanding of the electronic structure of molecules will enable us to extract relevant chemical ...

Analytical strategies based on inductively coupled plasma sprectroscopy (ICP) and diffusive gradients in thin fims (DGT) techniques for the assessment of environmental pollution indicators

Colon i Bosch, Mireia (Date of defense: 2011-02-11)

In this thesis, simple methods to determine sulfide at low levels (µg L-1) in aqueous samples and sediments by water free hydrogen sulfide vapor generation using a commercially available vapor generation accessory have ...

Selenium cycling in volcanic environments: the role of soils as reactive interfaces

Floor, Geerke Henriette (Date of defense: 2011-03-29)

Selenium (Se) is an element with important health implications that is emitted in significant amounts from volcanoes. Attracted by the fertility of volcanic soils, around 10% of the world population lives within 100 km of ...

Pèptids biarílics a partir de 4-iodofenilalanina o 3-iodotirosina per borilació i reacció de Suzuki-Miyaura en fase sòlida. Avaluació de l'activitat antimicrobiana

Afonso Afonso, Ana (Date of defense: 2011-07-22)

En aquesta tesi doctoral es va estudiar la preparació de pèptids biarílics en fase sòlida. En primer lloc, es varen borilar residus de fenilalanina o tirosina presents a la seqüència peptídica a través d’una reacció de ...

Rhodium(I) catalyzed [2+2+2] cycloaddition reactions: experimental and theoretical studies

Dachs Soler, Anna (Date of defense: 2011-07-29)

The [2+2+2] cycloaddition reaction involves the formation of three carbon-carbon bonds in one single step using alkynes, alkenes, nitriles, carbonyls and other unsaturated reagents as reactants. This is one of the most ...

Development of chemical separation processes for the treatment and monitoring of metallic cations and oxoanions in polluted waters

Güell Martí, Raquel (Date of defense: 2011-10-07)

The chemical contamination of natural waters is a global problem with a worldwide impact. Considering the relevance of this problem, this thesis is intended, on one hand, to develop different separation/preconcentration ...

Efecto de la aplicación de altas presiones hidrostáticas en un producto de origen animal, el jamón curado y en un producto vegetal, el nabo

Clariana Orduña, Maria (Date of defense: 2011-12-16)

High pressure processing is a food preservation technique which can be an alternative to heat treatment. Pressurization, in theory, produces changes in organoleptic properties and antioxidant compounds to a lesser extent. ...

Managanese and dicopper complexes for bioinspired oxidation reactions: catalytic and mechanistic studies on C-H and C=C oxidations

Garcia Bosch, Isaac (Date of defense: 2011-12-20)

Enzymes are high-weight molecules which catalyze most of the metabolic processes in living organisms. Very often, these proteins contain one or more 1st row transition metal ions in their active center (Fe, Cu, Co, Mn, Zn, ...

Synthesis of antimicrobial peptides derived from BP100 and BPC194

Güell Costa, Imma (Date of defense: 2012-01-27)

In the present PhD thesis we studied the solid-phase peptide synthesis of antimicrobial peptides derived from the lead peptides BP100 and BPC194. First, peptides derived from BP100 containing D-amino acids at different ...

Reaccions de cicloaddició [2+2+2] catalitzades per Rh(I)

Garcia López, Lídia (Date of defense: 2012-02-24)

The development of new chemical processes and efficient catalysts for the formation of carbon-carbon bonds is an important topic in organic chemistry. In particular, the [2+2+2] cycloaddition reaction involving different ...

Synthesis of unusual alpha-amino acids and study of the effect of their incorporation into antimicrobial peptides. Total synthesis of biactive marine natural products and analogues thereof

El Marrouni El Ghazaoui, Abdellatif (Date of defense: 2012-04-13)

The principle theme of this thesis was the synthesis of bioactive compounds. To this end, this work was focus on two main projects. The first one, which was carried out in the Department of Chemistry of the University of ...

Metalls de transició en la formació d'enllaços carboni-carboni: cicloaddicions [2+2+2] catalitzades per Rh(I) i acoblaments creuats catalitzats per Pd(0) i Ni(0)

Brun Massó, Sandra (Date of defense: 2012-04-27)

Carbon-carbon bond formation reactions catalyzed by transition metals represent one of the most versatile and efficient strategies in organic synthesis. The catalytic transformations contribute to the development of ...

Reactivity of well-defined organometallic copper(III) complexes in carbon-heteroatom bond forming reactions

Casitas Montero, Alícia (Date of defense: 2012-06-01)

This thesis is focused on the unexplored field of organometallic copper(III) chemistry. Arylcopper(III) complexes have been proposed as key intermediates in Ullmann condensation reactions that consist in the coupling of ...