Publications by authors named "Rui Santos"

The World Health Organization estimates that currently available vaccines prevent 2 to 3 million deaths worldwide each year. Preventing infectious diseases is an important public health priority to ensure healthy ageing and improve quality of life. This study's aim is to identify the best strategies to increase vaccination coverage in the elderly.

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Essential oils (EOs) and oleoresins (ORs) are plant-derived extracts that contain both volatile and non-volatile compounds used for flavoring, coloring, and preservation. In the food industry, they are increasingly used to replace synthetic additives, aligning with consumer demand for natural ingredients, by substituting artificial flavors, colorants, and preservatives. Microcapsules can be added to a vast range of foods and beverages, including bakery products, candies, meat products, and sauces, as well as active food packages.

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The invasive seaweed Rugulopteryx okamurae, native to East Asia, is spreading rapidly along the western Mediterranean and southern Portugal, severely affecting coastal biodiversity, ecosystem structure, and economic sectors such as fisheries and tourism. This study examined the nutrient uptake kinetics of R. okamurae, including ammonium, nitrate, urea, amino acids, and phosphate, and their role in nitrogen and phosphorus budgets based on laboratory growth rates.

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  • Patchy data on litter decomposition in wetlands limits understanding of carbon storage, prompting a global study involving over 180 wetlands across multiple countries and climates.
  • The study found that freshwater wetlands and tidal marshes had more organic matter remaining after decay, indicating better potential for carbon preservation in these areas.
  • Elevated temperatures positively affect the decomposition of resistant organic matter, with projections suggesting an increase in decay rates by 2050; however, the impact varies by ecosystem type and highlights the need to recognize both local and global factors influencing carbon storage.
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  • - The HHH Workshop held in Dubrovnik in July 2023 focused on advancing the understanding of the Higgs boson and its properties within the Standard Model (SM).
  • - To confirm or challenge the SM, researchers need to measure the full potential of the Higgs, including the triple and quartic scalar couplings, particularly involving three scalar bosons at around 125 GeV.
  • - The report highlights ongoing experimental efforts and theoretical models aimed at improving measurement rates and addressing challenges related to multi-scalar final states.
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Objectives: The aim of the present study was to investigate if there are differences in mitigation acute pain following oral surgery procedures within a hospital setting and regarding various medication regimens.

Materials And Methods: A systematic literature search was performed between the years 2013 and 2023, including the databases PUBMED, Cochrane and Scopus, to identify the clinical trials investigating the prescription of non-steroidal (NSAID's) anti-inflammatory drugs before or after an oral surgery. A meta-analysis with meta-regression model was employed on the primary and secondary outcomes, such as pain, swelling and trismus.

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Background: Men's access to sexual health care is influenced by the nurses' symbolic universes, translated into maps of signification and normative idealization that structure their practices.

Aim: The aim of the study was to analyze nurses' social representations of men's sexual health, considering the barriers and possibilities in accessing health care.

Methods: Descriptive study with qualitative approach.

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Current evidence suggests that macroalgal-dominated habitats are important contributors to the oceanic carbon cycle, though the role of those formed by calcifiers remains controversial. Globally distributed coralline algal beds, built by pink coloured rhodoliths and maerl, cover extensive coastal shelf areas of the planet, but scarce information on their productivity, net carbon flux dynamics and carbonate deposits hampers assessing their contribution to the overall oceanic carbon cycle. Here, our data, covering large bathymetrical (2-51 m) and geographical ranges (53°N-27°S), show that coralline algal beds are highly productive habitats that can express substantial carbon uptake rates (28-1347 g C m day), which vary in function of light availability and species composition and exceed reported estimates for other major macroalgal habitats.

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The ongoing combination of global warming and increased anthropogenic pressure is causing latitudinal shifts in marine species, potentially impacting community composition, local richness, and marine trophic webs. This study investigates the factors influencing the distribution and diversity of intertidal seaweed and associated peracarid communities, including their functional traits, and explores various facets of beta diversity (taxonomic and functional). We hypothesize that: 1) abiotic factors such as temperature and anthropogenic pressure significantly influence seaweed distribution and diversity shifts, and 2) changes in seaweed functional diversity have an impact on the diversity and functioning of its associated peracarid communities.

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  • The study focuses on understanding how dental pulp changes after death to help estimate the post-mortem interval (PMI), particularly beyond the first week, using both qualitative and quantitative analysis of dental histomorphology.
  • A total of 27 sound teeth from 16 healthy patients were analyzed, considering various time intervals post-tooth extraction to simulate time elapsed since death.
  • Initial findings indicate that dental pulp shows signs of degeneration as soon as 7 hours post-mortem, though the specific histological changes exhibit significant variability.
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Soil contamination with metals is a major threat for the environment and public health since most metals are toxic to humans and to non-human biota, even at low concentrations. Thus, new sustainable remediation approaches are currently needed to immobilize metals in soils to decrease their mobility and bioavailability. In this work, we explore the application of discarded substrates from hydroponic cultivation, namely coconut shell and a mixture of coconut shell and pine bark, for immobilization of metals (Cd, Cr, Ni, Cu, Pb, Hg, Sb and As) in a naturally contaminated soil from a mining region in Portugal.

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Background: Neonatal chest-Xray (CXR)s are commonly performed as a first line investigation for the evaluation of respiratory complications. Although lung area derived from CXRs correlates well with functional assessments of the neonatal lung, it is not currently utilised in clinical practice, partly due to the lack of reference ranges for CXR-derived lung area in healthy neonates. Advanced MR techniques now enable direct evaluation of both fetal pulmonary volume and area.

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A 55-year-old man submitted to emergency surgery due to cardiac perforation by stabbing. One month later, he presented with chest pain, and a transthoracic echocardiogram revealed moderate-severe mitral regurgitation. After 6 months, a new transthoracic echocardiogram showed a left ventricular pseudoaneurysm, being later submitted to pseudoaneurysm exclusion and mitral valvuloplasty.

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Introduction: Age Estimation has been considered as a human basic right, carried out through the use of tables for dental age assessment based on the chronology of tooth eruption. As such, the final aim of this investigation is to create tables with applicability to the Portuguese population, for the different scoring systems used and combined different statistical approaches.

Materials And Methods: For this purpose, dental age assessment was achieved in all four third molars, using different scoring systems, in a total sample of 626 orthopantomograms (324 females, 302 males), aged between 12 and 25 years old, from the database population of Lisbon North University Hospital Center, approved by the Ethic Committee.

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Introduction: Pulmonary artery aneurysm (PAA) is a rare abnormality of pulmonary vasculature. It can be idiopathic or secondary to various pathologies, frequently with multiple factors leading to its formation. We report the case of a man with concomitant sarcoidosis and PAA.

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  • * Those with persistent infections were found to have over 50% higher odds of experiencing long COVID symptoms compared to those without persistent infections.
  • * The research reveals viral mutations associated with these persistent infections, suggesting ongoing viral evolution and potential impacts on treatment and vaccine effectiveness.
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Introduction: Pericardial effusion is common in the setting of rheumatoid arthritis (RA); however, it is rarely its first manifestation.

Case Description: An 82-year-old male presented with abdominal pain, vomiting and fever. Blood analysis revealed elevated systemic inflammatory markers, and an abdominal computed tomography scan revealed non-specific alveolar condensation of the right pulmonary base and pericardial effusion subsequently quantified as medium size by transthoracic echocardiography.

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We employed microemulsion combined with the solvent evaporation technique to produce biodegradable polycaprolactone (PCL) MCs, containing encapsulated isophorone diisocyanate (IPDI), to act as crosslinkers in high-performance adhesive formulations. The MC production process was optimized by applying a design of experiment (DoE) statistical approach, aimed at decreasing the MCs' average size. For that, three different factors were considered, namely the concentration of two emulsifiers, polyvinyl alcohol (PVA) and gum arabic (GA); and the oil-to-water phase ratio of the emulsion.

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Background/objectives: Locoregional therapy (LRT) might impel hepatocellular carcinoma (HCC) to exhibit different phenotypes by modulating tumoral cell adaptation. HCCs presurgically treated with LRT were studied, focusing on stemness and mesenchymal features.

Methods: Clinicopathological and immunohistochemical data (Ki67, p53, EpCAM, CK19, CK7, ASMA and vimentin expression) were considered in 89 HCC nodules (30 treated with LRT; 59 non-treated), comprising 46 liver transplanted/surgically resected patients.

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Brazil is a continental country with significant socioeconomic and ethnic inequalities. It is important to understand how these differences are reflected in health care, especially during the COVID-19 pandemic. We investigated the potential impacts of the reduced number Transcranial Doppler Ultrasound (TCD) tests performed in Brazil during the COVID-19 pandemic, and its reflections according to region and race/color for patients with Sickle Cell Disease (SCD).

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  • The human hand is vital for daily activities, and disabilities can severely impact a person's ability to perform tasks independently.
  • The Nuada Glove is a robotic exoskeleton designed to help individuals with hand impairments regain function, particularly for grasping movements.
  • A pilot study involving 63 participants showed that 98% improved their hand function with the Nuada Glove, indicating its effectiveness and user-friendliness, and future research is needed to test it in real-world settings.
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Tidal marshes store large amounts of organic carbon in their soils. Field data quantifying soil organic carbon (SOC) stocks provide an important resource for researchers, natural resource managers, and policy-makers working towards the protection, restoration, and valuation of these ecosystems. We collated a global dataset of tidal marsh soil organic carbon (MarSOC) from 99 studies that includes location, soil depth, site name, dry bulk density, SOC, and/or soil organic matter (SOM).

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How locoregional therapy (LRT) may change tumor compositional and functional heterogeneity, consequently contributing to treatment resistance and tumor recurrence remains largely unknown. A series of hepatocellular carcinomas (HCCs) treated with preoperative locoregional therapy (LRT) that relapsed after surgery was studied. Thirty HCCs comprising 15 patients treated with LRT prior to liver transplantation (n = 14)/surgical resection (n = 1) were studied.

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Influenza is a respiratory disease caused by the influenza virus, which is highly transmissible in humans. This paper presents a systematic review and meta-analysis of randomized controlled trials (RCTs) and test-negative designs (TNDs) to assess the vaccine effectiveness (VE) of seasonal influenza vaccines (SIVs) in humans aged 15 to 64 years. An electronic search to identify all relevant studies was performed.

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