Browsing by Issue Date, starting with "2023-05-16"
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- Analysing the effects of different types of exercise on dyspnoea and fatigue in adults through COPD - systematic review and meta-analysis of randomised clinical trialsPublication . Couto, Nuno; Cid, Luís; Alves, Susana; Brito, João Paulo; Pimenta, Nuno; Bento, TeresaBackground: Chronic obstructive pulmonary disease (COPD) is a heterogeneous lung condition, the main symptoms of which are dyspnoea and fatigue. Though exercise has been recommended for subjects with COPD, its benefits remain unclear. The aim of this study was to summarise, through a systematic review and meta-analysis, the available evidence on the effects of aerobic, resistance, stretching, and combined exercise on the main symptoms of COPD. Methods: Search was performed using the electronic databases PubMed and Web of Science. Randomised controlled trials (RCTs) with interventions based on aerobic, resistance and/or combined exercise published until July 2022 were identified. The effects were summarised based on standardised mean differences (95% confidence intervals) using random and fixed effect models. Results: Eight studies were selected, including a total of 375 subjects. The results obtained showed that resistance exercise, aerobic exercise and combined exercise seem to improve dyspnoea and fatigue symptoms in COPD subjects. Conclusions: In general, we can conclude that exercise-based interventions appear to improve the main COPD symptoms and may benefit quality of life in this population.
- De-colonizar o dualismo natureza-cultura: ressonâncias teológicas da proposta de Bruno LatourPublication . Duque, João ManuelO artigo pretende considerar a teologia latino-americana especificamente na sua relação com o pensamento decolonial. Para tal, pretende explorar o enquadra- mento epistemológico e antropológico fundamental da perspetiva colonial no âmbito do desenvolvimento de certo pens- amento da modernidade, que originou con- traposições binárias com efeitos colonialis- tas, seja na relação da Europa com o resto do mundo, seja no interior de todas as relações dos humanos com o mundo não humano. Para a exploração desse camin- ho seguem-se de perto as propostas de Bruno Latour, seja no sentido de uma antropologia simétrica, seja no sentido de uma re-animação do planeta, superando o dualismo entre sujeito e objeto. Essa proposta poderá inspirar um pensamento geral, também teológico, que recupere modos não coloniais de relação dos humanos ao mundo e dos humanos entre si.
- 'Rocha’ Pear ripening under the 1-mcp evergreen effect: the impact of the auxin 1-naphthaleneacetic acid treatmentPublication . Dias, Cindy Leonor Alves; Rodrigues, Ana Cristina; Vasconcelos, Marta; Ferrante, Antonio; Pintado, Manuela E.‘Rocha’ pear (Pyrus communis L. cv. Rocha), is a DOP cultivar from the West region of Portugal that is appreciated worldwide. Combined with controlled atmosphere storage, 1-methylcyclopropene (1-MCP) application, an antagonist of ethylene action, has been one of the most applied techniques to extend the storage of ‘Rocha’ pear. However, fruit industry is facing a problem resulting from 1-MCP application: it prevents the normal ripening of the fruit and affects the final quality at the consumer level. In this study, we exposed 1-MCP treated fruits to an auxin 1-naphthaleneacetic acid (1- NAA) solution (2 mM) and analyzed the efficacy in restoring the ripening of ‘Rocha’ pear. First, during the first 24 h, we determined the primary impact of 1-NAA on the expression of genes encoding ethylene receptors (PcETRs) and ethylene biosynthesis enzymes (PcACS and PcACO), combined with lipid peroxidation and reactive oxygen species. We also studied the effect of 1-NAA on ethylene production, respiration, and other ripening markers (firmness and sugars) across shelf life. Herein, the expression of PcACS1 and PcACS4 increased in 1-MCP fruit treated with 1- NAA compared to pear treated only with 1-MCP. Additionally, the expression of PcETR2 and PcETR5 was enhanced, revealing the potential of the 1-NAA treatment in inducing the production of new ethylene receptors. Time course physicochemical analysis revealed that fruit ripening was accelerated by 1- NAA treatment, as judged by ethylene evolution and respiration associated with softening. The 1-NAA treatment increased firmness loss (ca. 60%) and internal ethylene production (ca. 50%). Also, exogenous 1-NAA treatment increased 1- aminocyclopropane carboxylic acid (ca. 28%) and ACC oxidase activity (ca. 15%) corroborating the increased in gene expression. Our findings reveal that 1-NAA treatment may circumvent 1-MCP effect providing valuable information for ripening studies in pear.
- Biodegradation of pollutants in the environment: omics approachesPublication . Moreira, Irina S.
- A arte ao serviço da liturgia no pré e no pós Vaticano IIPublication . Costa, Paula Isabel Ferreira Braga; Abreu, José Paulo LeiteA história da arte cristã deu-nos, ao longo de vários séculos, imagens, símbolos, reflexões profundas, técnicas, doutrina e sermões e sobretudo respostas a questões que só através de uma pesquisa se esclarecem. O Cristianismo marcou e marca de forma indelével a arte Europeia e Ocidental por mais de dois mil anos. As suas raízes, mais marcantes, a sua essência, a sua natureza e as suas mais íntimas transformações e adaptações, muitas vezes desconhecidas, refletem-se na obra deixada, quer no âmbito espiritual, quer na obra edificada. O que se pretende evidenciar, através deste trabalho é o caminho que a arte cristã percorreu, através de várias épocas, marcadas e identificadas, sempre fiel à sua grande inspiração que é Cristo. A simples construção de um edifício, tem na arte cristã o seu lugar de destaque uma vez que edificar, por si só, é uma palavra estruturante de Deus na sua obra de salvação. Desta forma, sigo um itinerário que põe a descoberto a adaptação da arte cristã, cujas modificações são visíveis através da renovação dos espaços de acordo com o Concílio Vaticano II. Para que seja mais visível essa transformação, no espaço, estabeleço o paralelo emblemático entre duas igrejas que falam por si, cada uma delas manifestando a diferença, mas preservando um fator comum, a sua beleza que, dentro da diferença, conserva, no pormenor, a sua inicial identidade.
- Drivers, advances, and significance of measures for effective circular food packagingPublication . Poças, Fátima; Selbourne, Maria do CéuThis paper provides an overview of the fundamental aspects pertaining an effective circular packaging. The main challenges of food packaging systems to comply with the principles of circular economy are addressed. A perspective of the technical issues that drive packaging developments is given, and the main barriers and limiting factors for packaging waste reduction, reusing, and recycling are discussed, particularly as applied to plastic packaging. The state-of-art of recycling plastics for food contact is presented, as well as the gaps for safety assurance. The relevance of consumer and the impact on the whole chain is discussed under the framework of citizens motivation, ability, and opportunity to engage the different measures. Finally, the main measures under the scope of the packaging and waste regulation, and foreseen amendments, and of the plastics recycling directive are briefly presented.