Now showing items 38-57 of 141

    Desenvolupament de metodologia analítica per a la determinació de glifosat i adjuvants 

    Corbera Mas, Marta (Date of defense: 2008-02-15)

    El glifosat és un herbicida no selectiu àmpliament utilitzat en cultius agrícoles i zones no agrícoles que requereixen un control de la vegetació. Tot i la baixa toxicitat del glifosat en si mateix, la seva aplicació es ...

    Desenvolupament de metodologia analítica per al seguiment d'herbicides fenoxiacètics i cafeïna en el medi ambient 

    Moret Solà, Sònia (Date of defense: 2006-12-15)

    El control d'herbicides i altres anàlits orgànics presents en el medi ambient constitueix una pràctica habitual en els laboratoris des de l'establiment de legislacions que limiten la seva concentració. Per aquesta raó, cal ...

    Desenvolupament de mètodes de determinació de compostos fenòlics en aigües i sòls. Caracterització dels processos d'adsorció en diferents tipus de sòls. 

    Sirvent Masias, Gemma (Date of defense: 2005-04-22)

    El desenvolupament de mètodes d'anàlisi de compostos fenòlics és una pràctica habitual en molts laboratoris des de l'establiment de mesures legislatives de control de les concentracions d'aquestes substàncies en el medi ...

    Desenvolupament de mètodes de preconcentració emprant membranes líquides suportades i extracció en fase sòlida per a la determinació de l'herbicida glifosat i el seu metabòlit AMPA en aigües naturals 

    Rios Losada, Carolina (Date of defense: 2004-04-16)

    El glifosat, N-(fosfonometil) glicina, és un dels herbicides més utilitzats arreu del món a causa de la seva baixa toxicitat i al seu ampli espectre d'aplicació. A conseqüència del gran ús que se'n fa, és necessari ...

    Desenvolupament, implementació i aplicació de nova metodologia pel càlcul de la contribució vibracional a les propietats elèctriques: contribucions de relaxació nuclear i curvatura 

    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. ...

    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 ...

    Design, preparation and characterization of polymer inclusion membranes as an emerging technique for preconcentration and speciation measurements 

    Vera Chamorro, Ruben (Date of defense: 2019-03-15)

    Water is essential for humankind not only for its direct consumption but also for its multiple applications in industry or agriculture, among others. The presence of undesirable substances or pollutants directly affects ...

    Detecció de compostos volàtils, clorofenols, cloroanisoles i 2,4,6-tribromoanisole, relacionats amb el "gust del suro" 

    Insa Aguilar, Sara (Date of defense: 2006-05-22)

    D'entre els defectes organolèptics associats al vi, en destaca l'anomenat "gust de suro" habitualment vinculat a la presència de cloroanisoles, els quals són productes de l'activitat microbiana formats a partir dels ...

    Development and application of new methodologies for chemical bonding analysis 

    Gimferrer Andrés, Martí (Date of defense: 2023-03-27)

    In the last decades, electronic structure methods have been crucial for chemists to achieve deeper insight into chemistry itself and to make predictions before performing the actual experiments. The development of computational ...

    Development of analytical methodologies for the assessment of odorous and fragrance compounds in wastewater treatment plants 

    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 ...

    Development of analytical methodologies for the determination of emerging contaminants and phosphorus compounds 

    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. ...

    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 ...

    Development of flexible cavitand receptors based on calix[5]arene. Rational design, synthesis and study of their properties 

    Álvarez Yebra, Rubén (Date of defense: 2023-11-07)

    Cavitands are macromolecules with a permanent cavity where smaller molecules or ions can be accommodated. The hydrophobic cavity of these supramolecules allows the binding of other molecules though non-covalent interactions, ...

    Development of new reusable materials based on Ru complexes with catalytic activity for olefin epoxidation and nitrile hydration 

    Ferrer Vall-llosada, Íngrid (Date of defense: 2015-07-16)

    In this thesis we present the synthesis and characterization of different types of ruthenium complexes containing N-donor ligands together with dmso, Cl and H2O ligands, along with their complete characterization through ...

    Development of new solvent-free microextraction techniques for the analysis of volatile organic compounds: application to the use of breath analysis as a toxicological tool for explosure analysis 

    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 ...

    Development of new transition metal complexes for their use in sustainable catalytic processes and as antitumoral agents 

    Manrique Salas, Ester (Date of defense: 2018-10-22)

    In this thesis we present the synthesis and characterization of different types of ruthenium complexes containing N-donor ligands together with monodentate ligands, along with their complete characterization through s ...

    Development of structurally and electronally versatile aminopyridine cobalt complexes for photo-(electro) reduction of water and ketones 

    Call Quintana, Arnau (Date of defense: 2016-12-13)

    The increasing need for more efficient synthetic methods and sustainable processes for fuel and high-value organic molecules production can be seen as one of the major challenging goals for the future. Nature has developed ...

    Disseny i síntesi de lipopèptids cíclics i de pèptids conjugats derivats de BPC194 amb activitat antimicrobiana 

    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 ...

    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. ...

    Electronic structure, chemical bonding, and electronic delocalization of organic and inorganic systems with three-dimensional or excited state aromaticity 

    El Bakouri El Farri, Ouissam (Date of defense: 2017-11-22)

    Aromaticity is a key concept in chemistry, used by chemists to explain the structure, stability, and reactivity of many compounds. Aromatic compounds are present in industrial processes as well as in living systems. ...