Universitat de Barcelona
Now showing items 21-40 of 101
The main subject of this Thesis is the production of hard, wear and corrosion resistant cermets tungsten carbide and cobalt cermets (WC-Co) with different contents in cobalt matrix, onto low carbon steels and aluminum alloy ...
This thesis is a multidisciplinary study of the solid state of squaric acid derivatives which combines approaches from areas such as crystal engineering, supramolecular chemistry and crystallography. The structural preferences ...
Proteins are flexible entities, and thus move. Its function is closely related to the flexibility. To carry out any function is necessary a conformational change. As protein motions imply an exchange of conformations, ...
El principal objetivo de la presente tesis es la obtención de espumas de quitosano mediante la utilización de emulsiones altamente concentradas de tipo aceite en agua (O/W). Para alcanzar dicho objetivo, este trabajo ha ...
Las emulsiones son dispersiones de dos líquidos inmiscibles que, generalmente están estabilizadas por moléculas tensioactivas. Cuando la fracción en volumen de fase dispersa es superior o igual a 0,74 (valor que corresponde ...
This Thesis deals with the resolution of hyperspectral imaging data by using chemometric methods, in particular by using appropriate data pretreatment methods and by using Multivariate Curve Resolution (MCR) methods. The ...
Dynamic combinatorial chemistry proposes the creation of a library of compounds (dynamic combinatorial library, DCL) inter-connected through reversible chemical processes. The concentrations in a DCL are determined by ...
Organic/inorganic interfaces play a key role in organic electronic devices such as organic light emitting diodes (OLED), organic field effect transistors (OFET) and organic solar cells (OSC). In these interfaces crucial ...
Els plastificants són additius o monòmers dels plàstics que s'empren durant la fabricació d'aquests per modificar propietats fisicoquímiques. Poden arribar al medi ambient a partir de focus industrials, ja que són produïts ...
Los retardantes de llama halogenados (HFRs) se aplican a una gran variedad de materiales, como muebles, textiles, material electrónico, etc., con el objetivo de prevenir los incendios. La demanda global se incrementa año ...
Les drogues d'abús i els fàrmacs estan considerats com contaminants d'interès emergent en el medi aquàtic, és a dir, són substàncies que no estan incloses en els programes habituals de control i monitorització d'aigües, ...
To direct post-transcriptionally gene silencing, RNAi machinery exploits the formation of base pairs between the loaded guide strand and the complementary mRNA. The Ago2 protein is the “slicer” effector of the RISC and ...
La presencia de substàncies d’origen antropogènic en el medi aquàtic és un de les fites importants a les que actualment s’ha d’enfrontar la química ambiental. En la darrera dècada les drogues d’abús s’han sumat al conjunt ...
En los últimos años, los contaminantes emergentes (ECs) están recibiendo una creciente atención debido a los efectos nocivos que suponen para los organismos vivos y al riesgo ambiental que representan. Existen una gran ...
Pharmaceuticals which are used worldwide are designed to facilitate the life for the human society and have an important role in treatment and prevention of disease for both humans and animals. They are ubiquitous in the ...
In the present thesis we have investigated the development of new methodologies for the selective and straightforward chemical modification of Trp amino acid either alone or in peptides. In the first chapter, we have ...
Pain is one of the main medical problems that in several cases results into a chronic disease with limited effective treatment, thus the discovery of new drugs to fight against constitutes a big challenge nowadays. Metabotropic ...
Arribar a comprendre les causes i efectes dels canvis globals i les interaccions sinèrgiques del sistema climàtic continua sent un repte científic complex. Els informes del Panell Intergovernamental sobre el Canvi Climàtic ...
Marine natural products (MNPs) are, undoubtedly, highly valuable starting points for drug-development programs. Generally, MNPs show a well-defined spatial orientation that have evolved for thousands of years to interact ...
Amyloid-beta peptide (Aβ) is strongly linked to the aetiology of Alzheimer’s disease (AD). Aβ is the main component of the amyloid plaques found in the brain of AD patients, however, Aβ is also present in the brain of ...
