Dipòsit Digital de la Universitat de Barcelona
El Dipòsit Digital de la Universitat de Barcelona és el repositori institucional que conté en format digital els materials derivats de l'activitat docent, investigadora i institucional de la comunitat universitària.
Enviaments recents
ArticleValidation of a spanish-language version of the weight pressures in sport scale for male athletes
(Human Kinetics, 2020-12-01) Teixidor Batlle, Clara; Ventura Vall-llovera, Carles; Reel, Justine J.; Andrés, Ana
The study purpose was to validate the psychometric properties of a Spanish-language version of the weight pressures in sport scale for male athletes. The weight pressures in sport scale for male athletes assesses risk factors associated with sport-specific weight pressures from coaches, peers, and team uniform. The scale was back translated and administered to 407 Spanish male college athletes. The sample was randomly split to perform the exploratory and confirmatory analysis. After item analysis, three items were removed. The exploratory analysis identified two latent constructs (referring to coaches and teammates pressures, and pressures due to uniform), and the confirmatory analysis produced a two-factor model (comparative fit indexSB = .946, Tucker–Lewis indexSB = .925, root mean square of approximationSB = .071, standardized root mean square residualSB = .068). The overall scale showed adequate internal consistency (α = .82) and demonstrated adequate convergent validity with the other questionnaires. The Spanish-language version of the weight pressures in sport scale for male athletes can be used to measure weight-related pressures among male athletes in sport psychology and clinical settings.
Tesi
Extracellular vesicles from microbiota-derived Escherichia coli strains as a postbiotic strategy to Enhance intestinal maturation and modulate gut-liver and gut-brain communication axes
(Universitat de Barcelona, 2025-09-19) Martínez Ruiz, Sergio; Baldomà Llavinés, Laura; Badía Palacín, Josefa; Universitat de Barcelona. Departament de Bioquímica i Fisiologia
[eng] The intestinal microbiota plays a crucial role in maintaining mucosal and systemic homeostasis, particularly during early life when the immune and epithelial systems are still developing. Among microbial-derived components, extracellular vesicles (EVs) produced by beneficial gut bacteria have emerged as promising postbiotic agents capable of modulating host physiology beyond the gut. This thesis investigates the immunomodulatory, antiviral, metabolic, and neurodevelopmental effects of EVs derived from Escherichia coli strains EcN (probiotic) and EcoR12 (commensal) in in vivo neonatal and in vitro models.
In healthy neonatal rats, oral administration of E. coli EVs enhanced humoral and cellular immune responses, promoted intestinal epithelial maturation, and accelerated the development of a balanced Th1/Th2 immune profile without inducing inflammation. In a neonatal rotavirus infection model, EV treatment reduced diarrhea severity, preserved mucosal integrity, and stimulated virus-specific immunity. These protective effects were linked to the modulation of serotonin-related pathways and mucin secretion.
Beyond the gut, administered EVs reached the liver and induced gene expression profiles favoring anti-inflammatory, antioxidant, and lipid oxidation pathways, supporting their role in gut–liver axis communication under physiological conditions. In In vitro cellular models derived from human inducible pluripotent steam cells (iPSC), EVs upregulated the expression of tight junction proteins in intestinal organoids and enhanced dendritic branching during neuronal differentiation. These findings suggested that microbiota EVs may have a dual action along the gut–brain axis, modulating intestinal epithelial barrier integrity and neurodevelopment.
Collectively, the findings presented in this thesis position EcN- and EcoR12-derived EVs as safe and effective postbiotic candidates capable of supporting early-life immune and epithelial maturation, enhancing antiviral defenses, and modulating organ functions across diverse gut-organ axis. Moreover, they provide a strong rationale for further investigation of microbiota-derived EVs in disease-relevant models and future translational studies.
InformeCRAI Biblioteca d'Informació i Mitjans Audiovisuals. Memòria 2025
(Universitat de Barcelona. CRAI, 2026-04-17) Universitat de Barcelona. CRAI Biblioteca d'Informació i Mitjans Audiovisuals
Memòria que recull les activitats realitzades al CRAI Biblioteca d'Informació i Mitjans Audiovisuals durant l'any 2026.
Treball de fi de grauFormación y consolidación de la identidad fetichista. Etnografía sobre el footfetish.
(2026-03-18) Rodríguez Pagador, Sara; Celigueta, Gemma
Este trabajo explora la formación y consolidación de la identidad fetichista. Mediante entrevistas a hombres que se identifican como tal, observación participante en locales kinkis de Barcelona y etnografía virtual, se examinan los procesos, agentes y significados que intervienen en la construcción y solidificación de esta etiqueta. La investigación tiene en cuenta la construcción social e histórica de la sexualidad que jerarquiza las practicas fetichistas en un rango inferior. Bajo esta situación el estigma, tabú y secreto emergen en el individuo que elaborará estrategias de gestión y anonimato
ArticleInvestigating isotopic markers for hazelnut geographical authentication: Promising variables and potential applications
(Elsevier B.V., 2024-08-15) Torres Cobos, Berta; Rosell, Mònica; Soler, Anna; Rovira, Mercè; Romero, Agustí; Guardiola Ibarz, Francesc; Vichi, S. (Stefania); Tres Oliver, Alba
Hazelnuts' features and price are influenced by their geographical origin, making them susceptible to fraud, especially counterfeit claims regarding their provenance. Stable isotope analysis is a recognised approach to establish the geographical origin of foods, yet its potential in hazelnut authentication remains unexplored. In this prospective study, we assessed multiple isotopic markers in hazelnuts from different origins and evaluated the most promising variables for geographical authentication by chemometric tools. Our findings indicate that bulk δ18O, along with δ2H and δ13C in the main fatty acid methyl esters, exhibit significant potential in discriminating geographical origins, and 87Sr/86Sr analysis could serve as a proficient confirmatory tool. Though no single marker alone can differentiate between all the studied origins, employing a multi-isotopic approach based on PLS-DA models achieved up to 92.5 % accuracy in leave-10 %-out cross-validation. These findings will probably lay the groundwork for developing robust models for hazelnut geographical authentication based on larger datasets.