42 documents found, page 1 of 5
Impact of COVID-19 pandemic restrictions in pediatric cervical abscesses
Andrade, Antonio; Marques, Maria João; Pinto, João Viana; Valente, Pedro; Vaz, Ricardo; Mendes Leal, Manuel; Spratley, JorgeObjective: Compare the incidence and management of pediatric cervical abscesses (PCA) during the COVID-19 pandemic with a reference cohort. Study Design: Retrospective observational. Methods: Surgically treated PCA cases from January/2015 to July/2021 were reviewed, categorized into pre-COVID-19 (January/2015 to February/2020) and COVID-19 (March/2020 to July/2021) groups. Incidence, demographic data, etiology,...
Unmet Challenges in COVID-19 Prevention for Immunocompromised Individuals: A Co...
Cunha, Ana Soraia; Raposo, Beatriz; V. Cordeiro, João; Marques, Maria João; Pedro, Ana RitaIntroduction: The COVID-19 pandemic, caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), resulted in significant disease burden and mortality. Despite vaccination successes, new virus variants persist, affecting unvaccinated and immunocompromised individuals (ICI) severely. These high-risk groups face elevated mortality and hospitalization rates. Vigilance and targeted health measures remain...
Exploring Marine Biomineralization on the Al-Mg Alloy as a Natural Process for ...
Marques, Maria João; Mercier, Dimitri; Seyeux, Antoine; Zanna, Sandrine; Tenailleau, Christophe; Duployer, Benjamin; Jeannin, Marc; Marcus, PhilippeABSTRACT: This study provides a detailed characterization of the AA5083 aluminum alloy, surface, and interface over 6 months of immersion in seawater, employing techniques such as SEM/EDX, GIXRD, mu-Raman and XPS. The purpose was to evaluate the evolution of the biomineralization process that occurs on the Al-Mg alloy. By investigating the specific conditions that favor the in situ growth of layered double hydr...
La biominéralisation comme bioinspiration pour le développement de solutions an...
BASSEGUY, Regine; Marques, Maria JoãoRÉSUMÉ: Dans le domaine de la corrosion, la nature se révèle être une source d’inspiration pour développer de nouveaux concepts de protection verts. En effet, il est largement reconnu que les micro-organismes sont capables non seulement d’accélérer la orrosion mais ils peuvent également l'inhiber et/ou protéger les matériaux qu’ils colonisent [1]. Ce constat a ainsi conduit à proposer des stratégies à base micr...
Enhancing Corrosion Resistance of Al-Mg Alloys through Biomineralization [Resumo]
Marques, Maria João; Fori, Benoit; Mercier, Dimitri; Seyeux, Antoine; Zanna, Sandrine; Marcus, Philippe; BASSEGUY, RegineABSTRACT: In recent decades, new emerging microbiological technologies have been studied, based on the recognition that microorganisms can inhibit corrosion by different mechanisms, the so-called MICI (microbiologically influenced corrosion inhibition), opening up different lines of research. In this context, biomineralization has been attracting the attention of researchers, with an increasing number of studie...
A Corrosão em Imagens
Simões, Alda; Sushkova, Alesia; Alves, Alexandra; Franco, Alexandra; Sá, Ana Isabel; Mata, Ana Leonor; Pereira, Ana Marisa; Vieira, Ana SoaresPREFÁCIO: No vasto panorama da ciência dos materiais, Portugal, abriga uma comunidade multidisciplinar dedicada ao estudo da corrosão e da proteção de materiais. Neste contexto, as Jornadas de Corrosão e Proteção de Materiais nascem como um evento crucial, marcado pela sua natureza técnico-científica. Estas jornadas são um fórum de divulgação e de discussão dos resultados da investigação científica e do desenvo...
The positive impact of biomineralization for marine corrosion protection of AA5...
Marques, Maria João; Jaume, Julien; Mercier, Dimitri; Seyeux, Antoine; Zanna, Sandrine; Basseguy, Regine; Marcus, PhilippeABSTRACT: This paper investigates, using surface characterisation techniques (SEM, XPS and ToF-SIMS), the impact of marine biological activity on AA5083 corrosion behaviour during seawater immersion. Different solar exposure (light vs. dark) results in distinct marine fouling development, influencing surface modifications. On the dark side, an Al/Mg oxide/hydroxide layer forms, allowing Cl - penetration. Pittin...
Marine biomineralization for enhanced corrosion resistance: Insights from the A...
Marques, Maria João; Nkoua, C.; Jaume, Julien; Diderot, Anthony; Mercier, Dimitri; Seyeux, Antoine; Délia, Marie-Line; Silva, S. da; Fori, B.; Blanc, C.ABSTRACT: Concerns about marine pollution and ecological threats caused by traditional corrosion protection technologies have driven the development of new environmentally friendly anti-corrosion solutions. In recent years, it became clear that microorganisms have the potential to positively impact corrosion behavior, a phenomenon known as MICI (microbiologically influenced corrosion inhibition) [1,2]. Although...
The corrosion behavior of aluminium-magnesium alloy in natural seawater: effect...
Marques, Maria João; Benedetti, A.; Castelli, F.; Delucchi, Marina; Faimali, Marco; Delsante, S.; Valenza, F.; Garaventa, F.; Pavanello, G.; Losurdo, M.ABSTRACT: Concerning the corrosion in seawater environments, microorganisms can cause corrosion (Microbiologically Influenced Corrosion - MIC) [1], but also inhibit it or protect against it, a process known as MIC Inhibition (MICI) [2-3]. Corrosion studies of Al-Mg alloys of the 5XXX series, widely used in the shipbuilding industry, requires wider comprehension regarding the impact of the microbial activity [4-...
Marine Microbial Induced Mineralization: Exploring Mechanisms for Bioinspired A...
Marques, Maria João; Zanna, Sandrine; Marcus, Philippe; Basseguy, RegineABSTRACT: In the field of corrosion, nature has proved to be a source of inspiration for developing new green protection concepts. Over the last decades, new emerging microbial-based technologies have been studied, based on the recognition that microorganisms can influence corrosion behaviour in an advantageous way, the so-called MICI (microbiologically influenced corrosion inhibition), opening different lines ...