https://hdl.handle.net/10216/25694 2026-04-17T11:26:56Z https://hdl.handle.net/10216/162903 Title: First Insight into Lignin Valorization as a Promising Biopolymer for the Modulation of the Physicochemical Properties of Port Wine Abstract: Lignosulfonate (LS), kraft lignin (KL), and organosolv lignin (OL) were evaluated as potential modulating agents of the physicochemical properties of Port wine at two different concentrations for 7 and 30 days. KL and LS demonstrated the ability to remove proteins and potentiate the anthocyanin concentration. LS reduced the tannin content and the interaction of salivary acidic proline-rich proteins with wine phenolic compounds. None of the lignin promoted a perceptible color change; however, the yellowish color of KL and OL at 100 g/hL contributed to an increase in the yellow tones of wines. Lignin improved wine aroma by reducing the amount of unwanted volatiles by 30% and increasing the content of ethyl esters associated with fruity aromas by up to 60%. The results suggest that lignin, especially LS, can be employed as a modulating agent, positively impacting wine's physicochemical properties. This valorization of a byproduct opens up new opportunities for the wine industry. 2024-01-01T00:00:00Z https://hdl.handle.net/10216/152995 Title: Antifouling Marine Coatings with a Potentially Safer and Sustainable Synthetic Polyphenolic Derivative Abstract: The development of harmless substances to replace biocide-based coatings used to prevent or manage marine biofouling and its unwanted consequences is urgent. The formation of biofilms on submerged marine surfaces is one of the first steps in the marine biofouling process, which facilitates the further settlement of macrofoulers. Anti-biofilm properties of a synthetic polyphenolic compound, with previously described anti-settlement activity against macrofoulers, were explored in this work. In solution this new compound was able to prevent biofilm formation and reduce a pre-formed biofilm produced by the marine bacterium, Pseudoalteromonas tunicata. Then, this compound was applied to a marine coating and the formation of P. tunicata biofilms was assessed under hydrodynamic conditions to mimic the marine environment. For this purpose, polyurethane (PU)-based coating formulations containing 1 and 2 wt.% of the compound were prepared based on a prior developed methodology. The most effective formulation in reducing the biofilm cell number, biovolume, and thickness was the PU-based coating containing an aziridine-based crosslinker and 2 wt.% of the compound. To assess the marine ecotoxicity impact of this compound, its potential to disrupt endocrine processes was evaluated through the modulation of two nuclear receptors (NRs), peroxisome proliferator-activated receptor gamma (PPAR gamma), and pregnane X receptor (PXR). Transcriptional activation of the selected NRs upon exposure to the polyphenolic compound (10 mu M) was not observed, thus highlighting the eco-friendliness towards the addressed NRs of this new dual-acting anti-macro- and anti-microfouling agent towards the addressed NRs. 2022-01-01T00:00:00Z https://hdl.handle.net/10216/173730 Title: Tidal signatures on surface chlorophyll a concentration in the Brazilian Equatorial Margin 2026-03-19T00:00:00Z https://hdl.handle.net/10216/127351 Title: Effect of acids and alkalis on the resistance of a polypropylene geotextile against thermo-oxidation Abstract: <jats:p>The long-term behaviour of geosynthetics is one of the most important topics in the research about these materials. This work studies the effect of some liquids (water, sulphuric acid 0.1 mol.L-1 and sodium hydroxide 0.1 mol.L-1) in the resistance of a polypropylene geotextile against thermo-oxidation. For that purpose, the geotextile was (1) exposed in isolation to the liquids (immersion tests) and to thermo-oxidation (oven-ageing tests) and (2) exposed consecutively to both degradation tests (combined effect). The damage suffered by the geotextile in the degradation tests was evaluated by monitoring changes in its tensile behaviour. Based on the changes occurred in tensile strength, reduction factors were determined. The reduction factors obtained in the successive exposures to liquids and thermo-oxidation were compared with the reduction factors determined by the traditional methodology for the combined effect of those agents. The results, among other findings, showed the existence of an effect of sulphuric acid 0.1 mol.L-1 in the resistance of the geotextile against thermo-oxidation. Indeed, the successive exposure to sulphuric acid 0.1 mol.L-1 and thermo-oxidation (two agents that individually did not cause relevant damage) led to some degradation. Due to the interaction occurred between the degradation agents, the traditional methodology was unable to predict correctly (by underestimating) the reduction factor for the combined effect of sulphuric acid 0.1 mol.L-1 and thermo-oxidation.</jats:p> 2019-01-01T00:00:00Z https://hdl.handle.net/10216/173721 Title: Influence of metal ions on the oxidative resistance of polypropylene geotextiles 2026-01-08T00:00:00Z https://hdl.handle.net/10216/96882 Title: Heuristics and exact methods for number partitioning Abstract: Number partitioning is a classical NP-hard combinatorial optimization problem, whose solution is challenging for both exact and approximative methods. This work presents a new algorithm for number partitioning, based on ideas drawn from tree search, breadth first search, and beam search. A new set of benchmark instances for this problem is also proposed. The behavior of the new method on this and other testbeds is analyzed and compared to other well known heuristics and exact algorithms. 2010-01-01T00:00:00Z https://hdl.handle.net/10216/173365 Title: Complex Lagrangians in a hyperKahler manifold and the relative Albanese Abstract: Let M be the moduli space of complex Lagrangian submanifolds of a hyperKahler manifold X, and let omega : (A) over cap -> M be the relative Albanese over M. We prove that (A) over cap has a natural holomorphic symplectic structure. The projection omega defines a completely integrable structure on the symplectic manifold (A) over cap. In particular, the fibers of omega are complex Lagrangians with respect to the symplectic form on (A) over cap. We also prove analogous results for the relative Picard over M. 2020-01-01T00:00:00Z https://hdl.handle.net/10216/172945 Title: P31-27 Mitochondria-Targeted Edaravone Derivatives as Neuroprotective Agents 2025-01-01T00:00:00Z https://hdl.handle.net/10216/171072 Title: Recovering post-pandemic learning: analysis of a summer camp programme in a non-formal education context 2025-01-01T00:00:00Z https://hdl.handle.net/10216/151176 Title: The INOVMineral Project's Contribution to Mineral Exploration-A WebGIS Integration and Visualization of Spectral and Geophysical Properties of the Aldeia LCT Pegmatite Spodumene Deposit Abstract: Due to the current energetic transition, new geological exploration technologies are needed to discover mineral deposits containing critical materials such as lithium (Li). The vast majority of European Li deposits are related to Li-Cs-Ta (LCT) pegmatites. A review of the literature indicates that conventional exploration campaigns are dominated by geochemical surveys and related exploration tools. However, other exploration techniques must be evaluated, namely, remote sensing (RS) and geophysics. This work presents the results of the INOVMINERAL4.0 project obtained through alternative approaches to traditional geochemistry that were gathered and integrated into a webGIS application. The specific objectives were to: (i) assess the potential of high-resolution elevation data; (ii) evaluate geophysical methods, particularly radiometry; (iii) establish a methodology for spectral data acquisition and build a spectral library; (iv) compare obtained spectra with Landsat 9 data for pegmatite identification; and (v) implement a user-friendly webGIS platform for data integration and visualization. Radiometric data acquisition using geophysical techniques effectively discriminated pegmatites from host rocks. The developed spectral library provides valuable insights for space-based exploration. Landsat 9 data accurately identified known LCT pegmatite targets compared with Landsat 8. The user-friendly webGIS platform facilitates data integration, visualization, and sharing, supporting potential users in similar exploration approaches. 2023-01-01T00:00:00Z https://hdl.handle.net/10216/172998 Title: Goret, C., Koch-Larrouy, A., Kouogang,Internal solitary waves refraction and diffraction from interaction with eddies off the Amazon Shelf from SWOT. 2026-02-17T00:00:00Z https://hdl.handle.net/10216/171789 Title: Contributions of Geomathematics to Validate the Optimization on the Definition of Sampling Campaigns 2026-01-04T00:00:00Z https://hdl.handle.net/10216/172949 Title: Lie algebroid connections, twisted Higgs bundles and motives of moduli spaces Abstract: Let L = (L, [ , ], 8) be an algebraic Lie algebroid over a smooth projective curve X of genus g >= 2 such that L is a line bundle whose degree is less than 2 - 2g. Let r and d be coprime numbers. We prove that the motivic class of the moduli space of L-connections of rank r and degree d over X does not depend on the Lie algebroid structure [ , ] and 8 of L and neither on the line bundle L itself, but only on the degree of L (and of course on r, d and X). In particular it is equal to the motivic class of the moduli space of KX(D)-twisted Higgs bundles of rank r and degree d, for D any effective divisor with the appropriate degree. As a consequence, similar results (actually slightly stronger) are obtained for the corresponding E-polynomials. Some applications of these results are then deduced. 2024-01-01T00:00:00Z https://hdl.handle.net/10216/172914 Title: A general Cayley correspondence and higher rank Teichmuller spaces Abstract: We introduce a new class of sl 2-triples in a complex simple Lie algebra g , which we call magical. Such an sl 2-triple canonically defines a real form and various decompositions of g . Using this decomposition data, we explicitly parametrize special connected components of the moduli space of Higgs bundles on a compact Riemann surface X for an associated real Lie group, hence also of the corresponding character variety of representations of pi 1X in the associated real Lie group. This recovers known components when the real group is split, Hermitian of tube type, or SO p,q with 1 < p < q, and also constructs previously unknown components for the quaternionic real forms of E-6, E-7, E(8 )and F-4. The classification of magical sl 2-triples is shown to be in bijection with the set of Theta-positive structures in the sense of Guichard-Wienhard, thus the mentioned parametrization conjecturally detects all examples of higher rank Teichmuller spaces. Indeed, we discuss properties of the surface group representations obtained from these Higgs bundle components and their relation to Theta-positive Anosov representations, which indicate that this conjecture holds. 2024-01-01T00:00:00Z https://hdl.handle.net/10216/171570 Title: Leveraging LLMs to improve human annotation efficiency with INCEpTION Abstract: Manual text annotation is a complex and time-consuming task. However, recent advancements demonstrate that such a task can be accelerated with automated pre-annotation. In this paper, we present a methodology to improve the efficiency of manual text annotation by leveraging LLMs for text pre-annotation. For this purpose, we train a BERT model for a token classification task and integrate it into the INCEpTION annotation tool to generate span-level suggestions for human annotators. To assess the usefulness of our approach, we con- ducted an experiment where an experienced linguist annotated plain text both with and without our model's pre-annotations. Our results show that the model-assisted approach reduces annotation time by nearly 23%. 2025-01-01T00:00:00Z https://hdl.handle.net/10216/160225 Title: ACE-2005-PT: corpus for event extraction in portuguese Abstract: Event extraction is an NLP task that commonly involves identifying the central word (trigger) for an event and its associated arguments in text. ACE-2005 is widely recognised as the standard corpus in this field. While other corpora, like PropBank, primarily focus on annotating predicate-argument structure, ACE-2005 provides comprehensive information about the overall event structure and semantics. However, its limited language coverage restricts its usability. This paper introduces ACE-2005-PT, a corpus created by translating ACE-2005 into Portuguese, with European and Brazilian variants. To speed up the process of obtaining ACE-2005-PT, we rely on automatic translators. This, however, poses some challenges related to automatically identifying the correct alignments between multi-word annotations in the original text and in the corresponding translated sentence. To achieve this, we developed an alignment pipeline that incorporates several alignment techniques: lemmatization, fuzzy matching, synonym matching, multiple translations and a BERT-based word aligner. To measure the alignment effectiveness, a subset of annotations from the ACE-2005-PT corpus was manually aligned by a linguist expert. This subset was then compared against our pipeline results which achieved exact and relaxed match scores of 70.55% and 87.55% respectively. As a result, we successfully generated a Portuguese version of the ACE-2005 corpus, which has been accepted for publication by LDC. 2024-01-01T00:00:00Z https://hdl.handle.net/10216/171498 Title: NarratEX dataset: explaining the dominant narratives in news texts 2025-01-01T00:00:00Z https://hdl.handle.net/10216/172792 Title: POTARCH INDUSTRIES AND ENVIRONMENTAL IMPACT FROM THE MIDDLE AGES TO THE EARLY MODERN PERIOD 2025-01-01T00:00:00Z https://hdl.handle.net/10216/146883 Title: Target-Oriented Synthesis of Marine Coelenterazine Derivatives with Anticancer Activity by Applying the Heavy-Atom Effect Abstract: Photodynamic therapy (PDT) is an anticancer therapeutic modality with remarkable advantages over more conventional approaches. However, PDT is greatly limited by its dependence on external light sources. Given this, PDT would benefit from new systems capable of a light-free and intracellular photodynamic effect. Herein, we evaluated the heavy-atom effect as a strategy to provide anticancer activity to derivatives of coelenterazine, a chemiluminescent single-molecule widespread in marine organisms. Our results indicate that the use of the heavy-atom effect allows these molecules to generate readily available triplet states in a chemiluminescent reaction triggered by a cancer marker. Cytotoxicity assays in different cancer cell lines showed a heavy-atom-dependent anticancer activity, which increased in the substituent order of hydroxyl < chlorine < bromine. Furthermore, it was found that the magnitude of this anticancer activity is also dependent on the tumor type, being more relevant toward breast and prostate cancer. The compounds also showed moderate activity toward neuroblastoma, while showing limited activity toward colon cancer. In conclusion, the present results indicate that the application of the heavy-atom effect to marine coelenterazine could be a promising approach for the future development of new and optimized self-activating and tumor-selective sensitizers for light-free PDT. 2021-01-01T00:00:00Z https://hdl.handle.net/10216/172573 Title: Coping with the flow: state mediation in european higher education 2026-01-01T00:00:00Z