Universitat de Barcelona
Now showing items 4766-4785 of 11039
El contexto geodinámico y tectónico del margen oeste de México se engloba dentro del régimen general de subducción de la placa oceánica del Pacífico bajo el continente Norteamericano (margen activo). <br/><br/>El oeste ...
1.- DELIMITACIÓN DE OBJETIVOS E HIPÓTESIS DE TRABAJO: <br/><br/>I. Evaluar la eficacia y factores pronósticos del tratamiento con I131 a dosis bajas calculadas del hipertirodismo por enfermedad de Graves: Incidencia de ...
A major challenge in evolutionary biology is understanding the main drivers that underlie morphological and species diversity. Ecological opportunity—access to new or previously inaccessible niches—has been identified as ...
Online social networks (OSNs) enable researchers to study the social universe at a previously unattainable scale. The worldwide impact and the necessity to sustain their rapid growth emphasize the importance to unravel the ...
Inosine is a guanosine analogue that when is found at the wobble position of the tRNAs (I34) expands its codon recognition capability. Inosine can wobble pair with cytosine, adenosine and uridine. Because inosine is not ...
In this Thesis we address the study of some non-linear evolution equations (e.g. pde's) modelling the dynamics of sexually-reproducing structured populations, with special emphasis on biological evolution driven by natural ...
La tesis está compuesta por un compendio de artículos. El objetivo principal es la clarificación de las relaciones filogenéticas del subgrupo Acrolophus del género Centaurea. Este grupo, predominantemente mediterráneo y ...
Gene translation is a central process in all cells, in which messenger RNA (mRNA) is decoded by the ribosome to produce a specific amino acid chain, that will later fold into an active protein. This process is facilitated ...
Angola is currently the 8th largest diamond producer in the world, but for historical reasons the subcontinental lithospheric mantle (SCLM) in the Congo-Kasai craton is still poorly studied. However, an understanding of ...
In the present work I analysed different aspects of the evolution of genus Limnebius (Coleoptera, Hydraenidae), including its molecular evolution using mitochondrial (COI, 16S, tRNA-leu, NAD1) and nuclear markers (18S, ...
This thesis studies a group of aquatic beetles (Agabus brunneus complex) that present important differences in the size of their geographic ranges. This complex is composed by an insular species (A. rufulus), a continental ...
The general aim of this dissertation is to investigate the evolution, the diversification and some ecological traits of the species of the strictly subterranean genus Troglocharinus Reitter, 1908. The genus Troglocharinus ...
The representation (or feature) learning has been an emerging concept in the last years, since it collects a set of techniques that are present in any theoretical or practical methodology referring to artificial intelligence. ...
[eng] During the last decade, advances in high-throughput sequencing (HTS) technologies have increased exponentially the generation of genomic data, especially of non-model species. In this thesis, we generated and used ...
Mygalomorphs is a cosmopolitan group that inhabits all the continents except Antarctica. The group and has been commonly described as ‘primitive’ because of the retention of plesiomorphic characters, such as the presence ...
How populations differentiate and become new species is a foundational question to the field of evolutionary biology and has important implications for the generation of both local and global patterns of species-level ...
The study of intraspecific diversity is essential in ecology and evolution as they reveal fine-scale patterns and it is crucial in conservation planning. The main aim of this thesis is to study the evolutionary history of ...
One of the most fascinating aspects of birds is their capability of migrate from one area to another throughout the year. Unravelling the patterns and processes involved in the evolution of migration is paramount to ...
This thesis is the final outcome of the project "Quantitative genetics of craniofacial traits: a functional approach to heritability", which received support from the Wenner-Gren Foundation for Anthropological Research in ...
In the present work, we studied the evolution of alternative splicing (AS) from different perspectives. First, we performed a preliminary analysis where we identified alternative exons with tissue-specific regulation in ...
