Universitat de Barcelona
Now showing items 2932-2951 of 11039
Cells, either as unicellular organisms or as part of a tissue of a multicellular organism, can acquire different functions thanks to their capability of changing their expression state. The enzyme synthesis, cell division ...
Helium is the second lightest element and the second most abundant element in the universe. It is named for the Greek god of the sun, Helios, and it was first discovered by French astronomer Jules Janssen as an unknown ...
Spontaneous activity in the cerebral cortex changes in different brain states. During desynchronized brain states (e.g. wakefulness, REM sleep), populations of neurons in the cerebral cortex fire action potentials in a ...
It is estimated that within a few years chronic obstructive pulmonary disease (COPD) will be the third leading cause of death worldwide. The morbidity and mortality associated with COPD are due, in part to acute exacerbation ...
The objective of this thesis is to study the first-order dynamics of subduction systems characterized by opposite dip polarity in adjacent plate segments. The absence of previous studies analyzing the geodynamic evolution ...
The El Niño-Southern Oscillation (ENSO) is a natural mode of climate variability in the tropical Pacific, which not only perturbs the local atmosphere, but whose impacts can also reach remote, extra-tropical regions through ...
El present estudi pretén analitzar el procés de conformació política d’una comunitat local a l’edat mitjana. Tal com la historiografia ha posat de manifest, poden ser diversos els factors que intervenen en la consolidació ...
E-grocery shopping is increasingly popular, but a significant part of the food products available online do not comply with food law requirements. The official control systems designed by Member States on the basis of the ...
E-glass fiber-reinforced composites (FRC) have become popular in dental and medical applications for load-bearing applications. This is due to their enhanced biomechanical matching with living tissues compared to traditional ...
In the behavioral sciences, the concept of phenotypic plasticity can be roughly categorized into two classes: developmental and activational plasticity. Developmental plasticity denotes the capacity of an individual carrying ...
Countless environmental aggressors could damage the integrity of tissues and organs. In humans, the limited regenerative ability prevents often the recovery of injured tissues, but this is not the case of the fruit fly ...
Macrophages are key regulators of immune system connecting innate and specific immune responses. Macrophages proliferate in presence of their growth factor, M-CSF. The addition of bacterial lipopolysacharide, LPS, induces ...
La història natural de "Sciurus vulgaris" a l'àrea de distribució d'Europa occidental és coneguda en la zona nòrdicacentral (70º N - 50º N), però és gairebé desconeguda en el terç meridional (50° N - 37' N), tot i que té ...
La complicació vascular més greu després del trasplantament hepàtic és la trombosi de l'artèria hepàtica. Quan aquesta complicació se sospita clínicament es realitza una ecografia Doppler amb la finalitat d'establir el ...
[cat] HIPÒTESIS: a) Hipòtesis principals: 1. L’ecografia uroginecològica (EUG) presenta patrons ecogràfics que permeten avaluar el funcionalisme del dispositiu col·locat a nivell suburetral per a tractar la IUE, de ...
Aquest treball aborda l'ecologia de les comunitats d'un dels grups de macroinvertebrats bentònics més diversos i abundants dels nostres rius, els quironòmids. El principal objectiu d'aquesta tesi ha estat estudiar l'estructura ...
La rata d'aigua meridional, Arvicola sapidus, és un rosegador endèmic de la Península Ibèrica i França, catalogat com a vulnerable. La fragilitat de les poblacions i l’insuficient coneixement per establir mesures destinades ...
Benthic diatoms, photoautotrophic, silicate plated, single-celled aquatic organisms dwelling on substrates, have been used in bioindication, since they are good indicators of ecological water state. In this thesis, we have ...
Seabirds have evolved within an open and dynamic environment, the ocean. As meso-top predators, seabirds are greatly influenced by the oceanographic conditions driving marine productivity, and therefore, distribution of ...
Cold-water coral (CWC) habitats dwell on continental shelves, slopes, canyons, seamounts, and ridge systems around the world’s oceans, from 50 m to depths up to 4000 m. CWC species provide heterogeneous habitats supporting ...
