Repositório da Universidade dos Açores
Repositório Institucional da Universidade dos Açores
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sohlepse e satrop ertne odnaicila: osbal sortuo. outros lados: aliciando entre portas e espelhos
Publication . Costa Carvalho, Magda
O Ciclo Festa de Desaniversário foi começando muito antes de se dar por isso, devagarinho, pé ante pé... envolto em excitantes latências. Um desses começos deu-se com encontros filosofantes online, durante todo o mês de agosto de 2020, entre crianças açorianas e crianças brasileiras (crianças cronológicas e não cronológicas). Talvez por ter sido um tempo estranhosíssimo em que nos obrigávamos a ficar em casa, no calor do verão dos açores e no frio do inverno no brasil, foi como se abríssemos portas misteriosas no país das maravilhas ou deslizássemos para espelhos de outros mundos.
New national and regional bryophyte records, 84
Publication . Wilbraham, Joanna; Abdirasulov, Farrukh; Alvarez, Denise Jacqueline; Andrade, Rui; Pires Bento da Silva Elias, Rui Miguel; Gabriel, Rosalina; Zander, Richard
Unpacking Dimensionality and Response Bias in the Environmental Identity Scale: A Methodological Investigation in the Portuguese Context
Publication . Arroz, Ana; Picanço, Ana; Pereira, Enésima; Gabriel, Rosalina; Clayton, Susan
Understanding individuals’ connection to nature is crucial for promoting sustainable attitudes and behaviors. The environmental identity (EID) scale, widely used to assess this connection, plays a key role in environmental research; however, its cross-cultural application requires rigorous psychometric validation. Although the revised 14-item EID scale has demonstrated good reliability, questions remain regarding its dimensionality and the potential influence of acquiescence due to exclusively positive worded items. This study examined both issues in Portuguese samples. In Study 1, exploratory and confirmatory factor analyses were conducted to test the factorial structure. Results supported a two-factor model with correlated dimensions: Restorative Connection to Nature (RCN) and Ecological Identity (EI), rather than a strictly unidimensional solution. In Study 2 acquiescence was assessed by comparing the original version with a balanced version that included partially reverse-worded items. Item distributions, factor loadings, and reliability were analyzed. The balanced version did not improve control of acquiescence; instead, reversed-worded items showed weaker loadings, lower explanation variance, and method effects, suggesting increased measurement bias. Overall, the findings support the robustness of the revised 14-item EID scale in Portugal while indicating that environmental identity is better conceptualized as a bidimensional construct portraying both reflective connection and identity-based engagement with nature. The results also highlight the limitations of reverse-worded items as a strategy for reducing response bias in value-laden constructs.
Ionic Liquids and Deep Eutectic Solvents for Polyphenol Extraction: Opportunities and Limitations
Publication . Rosa, Gonçalo; Barreto, Maria do Carmo; Seca, Ana; Pinto, Diana; Vlase, Ana-Maria
Polyphenols are structurally diverse plant secondary metabolites with broad biological activities and growing applications across the food, health, and materials sectors. Conventional extraction based on organic solvents (e.g., methanol, ethanol) is often energy-intensive, inefficient, and environmentally burdensome. Ionic liquids (ILs) and deep eutectic solvents (DESs) have therefore emerged as greener alternatives for polyphenol extraction. This review evaluates recent advances in solvent design, extraction performance, and process sustainability. Imidazolium-based ILs frequently achieve high yields and selectivity, particularly when coupled with ultrasound or microwave-assisted extraction, but high cost, synthetic complexity, viscosity-related constraints, and potential toxicity hinder scaleup. By contrast, DESs—especially those derived from choline chloride or lactic acid—are easier to prepare, less costly, and more compatible with industrial implementation, with efficiency enhanced by tailoring hydrogen bond networks, water content, and process intensification. Critical downstream challenges persist for both solvent classes, notably in extract purification and solvent recovery due to low volatility; approaches such as resin adsorption, antisolvent precipitation, and direct formulation have been explored. Overall, ILs and DESs represent compelling alternatives to conventional solvents, and future progress will depend on integrated extraction–recovery strategies, systematic solvent selection, and validation under scalable, sustainable processing conditions.
Por entre números, curvas e estrelas: a vida de Carl Friedrich Gauss
Publication . Teixeira, Ricardo Cunha
Neste texto, convida-se o leitor a descobrir a vida e obra de Carl Friedrich Gauss, um dos maiores matemáticos de todos os tempos, cuja influência ultrapassou largamente os limites da Matemática. Em particular, aponta-se para a importância de valorizarmos a Matemática enquanto ciência dos padrões.