Now showing items 1-20 of 141

    [2+2+2] cycloaddition reactions involving allenes catalysed by rhodium 

    Haraburda, Ewelina (Date of defense: 2015-07-28)

    The development of new chemical processes for the formation of carbon-carbon bonds is an important topic in organic chemistry. In particular, the transition metal catalysed [2+2+2] cycloaddition reaction is a highly efficient ...

    Activació d'O2, HOOH i t-BuOOH amb complexos de Cu i Fe amb lligands N-heterocíclics aromàtics i macrocíclics per l'oxidació de substrats orgànics i inorgànics en condicions suaus 

    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 ...

    Analysis and impact of antibiotics in marine organisms. Laboratory experiments and field studies 

    Serra Compte, Albert (Date of defense: 2021-03-26)

    Antibiotic residues in the environment are amongst the most concerning micropollutants due to their potential impact on the natural ecosystems and human health. In this thesis, laboratory and field studies were conducted ...

    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 ...

    Analysis of chemotherapy drugs and related compounds in aquatic environment: removal, transformation and risk evaluation in eco-friendly and advanced technologies 

    Ferrando Climent, Laura (Date of defense: 2016-11-28)

    In order to evaluate the increasing environmental and human risk of anticancer drugs in the environment, more information needs to be gathered about their presence, their toxicity, bioaccumulation and persistence. In ...

    Analysis of cooperation and electron delocalization in intermolecular hydrogen bonds 

    Guillaumes Domènech, Laia (Date of defense: 2015-06-15)

    This thesis presents different studies on hydrogen bonds that occur between two molecules. It is because of the biological importance of DNA that the base pairs, and other compounds with similar hydrogen bonds as these ...

    Analysis, occurrence, fate and behaviour of emerging micropollutants in wastewater and the receiving environment 

    Gusmaroli, Lucia (Date of defense: 2020-05-25)

    The presence of xenobiotics - such as pharmaceutically active compounds, endocrine disrupting compounds and pesticides - in the aquatic environment has risen great environmental concern due to their high toxicity even at ...

    Analytical methodologies based on X-Ray Fluorescence Spectrometry (XRF) and Inductively Couple Plasma Spectroscopy (ICP) for the assessment of metal dispersal around mining environments 

    Marguí Grabulosa, Eva (Date of defense: 2006-05-19)

    La investigació que es presenta en aquesta tesi es centra en l'aplicació i millora de metodologies analítiques existents i el desenvolupament de nous procediments que poden ser utilitzats per a l'estudi dels efectes ...

    Analytical methodology based on a silicone rod (SR) micro extraction combined with HPLC-DAD method for the determination of pharmaceuticals and antibacterial products in effluent wastewaters: characterization of the sorption removal processes by cork 

    Mallek, Maryam (Date of defense: 2018-10-25)

    Solid-phase microextraction (SPME) allow the achievement of high enrichment levels by using small volumes of solvents, enabling the low detection limits required for the determination of ketoprofen, naproxen, carbamazepine, ...

    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 ...

    Aplicación de la técnica GPC al análisis de polímeros de interés industrial 

    López Lastra, Adrián (Date of defense: 2020-07-28)

    Polymers are one of the most used compounds in the chemical industry because they have application in a wide variety of products for daily use. Polymer preparation and its analysis is a very active field of research in ...

    Aproximacions a la síntesi estereoselectiva de noves heteroarilglicines 

    Serrat i Sitjas, Xavier (Date of defense: 1999-06-04)

    L'objectiu principal de la present tesi doctoral ha consistit fonamentalment en la síntesi de noves heteroarilglicines òpticament pures. Amb aquesta idea s'han desenvolupat dues estratègies diferents: síntesi estereoselectiva ...

    Aproximacions sintètiques per a la preparació en dissolució i fase sòlida de llibreries de sistemes herocíclics de 5 membres amb elevada diversitat molecular. Síntesi d'imidazolones, triazoles i imidazoxazoles 

    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 ...

    Aproximacions sintètiques per a la preparació estereoselectiva de noves quinolil i pirazolilglicines i per a la preparació en fase sòlida de llibreries de benzotiazoles, 1,2,4-triazines i benzimidazoles 

    Cabarrocas Duran, Gemma (Date of defense: 1999-12-17)

    El treball experimental que ha permès redactar la present Tesi Doctoral ha estat dividit en dues parts. A la primera part es presenten els resultats referents a la síntesi estereocontrolada de noves heteroarilglicines ...

    Arsenic and its speciation analysis in biological and environmental samples using ICP techniques 

    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 ...

    Assessment of wastewater phytotechnologies for the attenuation of emerging organic contaminants and development of innovative analytical methods for their determination 

    Garcia Rodríguez, Aida (Date of defense: 2016-09-23)

    Emerging organic contaminants (EOCs), like pharmaceuticals and endocrine disrupting compounds, are continuously introduced into the environment. Some 2/2 have been found in water bodies, posing a risk on human health and ...

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

    Serrano Plana, Joan (Date of defense: 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 (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 ...

    Bioinspired iron models: from diiron complexes to supramolecular functionalized metallocavitands 

    Vidal Sánchez, Diego (Date of defense: 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 (Date of defense: 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 ...