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Anthocyanin-rich edible flowers – Impact of food matrix on anthocyanin stabilit...
Teixeira, Margarida; Tao, Wen; Ferreira, Isabel M.P.L.V.O.; Faria, Ana; de Freitas, Victor; Mateus, Nuno; Oliveira, HélderEdible flowers are emerging functional ingredients and dietary sources of anthocyanins, yet the influence of food matrices and digestion on their bioaccessibility and absorption remains unclear. Wild pansy (Viola tricolor), cosmos (Cosmos bipinnatus), and cornflower (Centaurea cyanus) were evaluated for nutritional composition, phytochemical content, and anthocyanin stability, digestibility, and absorption. All...
Phytochemical composition, antioxidant activity, and sensory evaluation of edib...
Rinaldi, Alessandra; Brandão, Elsa; Tao, Wen; Faria, Ana; Bordiga, Matteo; Piana, Gianluca; Soares, Susana; Mateus, Nuno; Freitas, VictorThis study examined white wine vinegar enriched with Cornflower, Cosmos, and Wild Pansy over a 30-day infusion. All infused vinegars showed significant changes in volatile and phenolic profiles. Cosmos and Cornflower increased anthocyanin content and color intensity, while Wild Pansy exhibited the highest antioxidant activity. Phenolic transfer varied by species, with Cosmos contributing the most diverse profil...
Análise e avaliação de um projeto de investimento no setor imobiliário
Oliveira, HélderEste trabalho consiste na avaliação de um projeto de investimento no setor imobiliário situado em Paranhos, Porto. A recolha de informações foi realizada em colaboração com os investidores e a empresa construtora do edifício, de forma a se considerar as perspetivas e os conhecimentos de cada interveniente. O principal objetivo será avaliar o valor gerado pelo projeto, tendo em consideração as estimativas de flu...
Sistema de Iluminação Inteligente com Arduíno
Silvestre, Daniel; Oliveira, Hélder; Rebelo, Rúben; Finuras, LuísO trabalho propõe um sistema de iluminação inteligente baseado em Arduíno. O objetivo é ajustar a intensidade da iluminação artificial com base na luz natural medida por um photoresistor, detetar altas temperaturas e humidade por meio de sensores e enviar sinais de alerta. O sistema é controlado remotamente por meio de uma aplicação móvel com conexão Bluetooth. A arquitetura do protótipo consiste em diversos co...
Children’s perceived barriers to a healthy diet: the influence of child and com...
Magalhães, Paula; Vilas, Catarina Viana Oliveira; Pereira, Beatriz Neves; Silva, Cátia; Oliveira, Hélder; Aguiar, Camila; Rosário, PedroA healthy diet influences the promotion and maintenance of health throughout an individual’s life. Many individuals struggle to have a healthy diet, despite it being mainly under their control. The current study aims to explore children’s perceived barriers to a healthy diet. A qualitative study with the open-ended question, “Please identify the top 5 barriers to a healthy diet”, was undertaken between January–...
Impact of a purified blueberry extract on in vitro probiotic mucin-adhesion and...
Silva, Sara; Costa, Eduardo M.; Oliveira, Hélder; Freitas, Vitor de; Morais, Rui M.; Calhau, Conceição; Pintado, ManuelaSeveral arguments have been made to substantiate the need for natural antimicrobials for the food industry. With blueberry extracts, the most compelling are both their healthy connotation and the possibility of obtaining a multipurpose solution that can be an antioxidant, colorant, and antimicrobial. From an antimicrobial perspective, as blueberry/anthocyanin-rich extracts have been associated with a capacity t...
Invasive and minimally invasive optical detection of pigment accumulation in br...
Oliveira, Luís; Gonçalves, Tânia; Pinheiro, Maria; Fernandes, Luís; Martins, Inês; Silva, Hugo; Oliveira, Hélder; Tuchin, Valery; Oliveira, LuísThe estimation of the spectral absorption coefficient of biological tissues provides valuable information that can be used in diagnostic procedures. Such estimation can be made using direct calculations from invasive spectral measurements or though machine learning algorithms based on noninvasive or minimally invasive spectral measurements. Since in a noninvasive approach, the number of measurements is limited,...
Behind the scenes of anthocyanins—From the health benefits to potential applica...
Câmara, José S.; Monica Locatelli; Pereira, Jorge A. M.; Oliveira, Hélder; Arlorio, Marco; Fernandes, Iva; Perestrelo, Rosa; Freitas, Victor<jats:p>Anthocyanins are widespread and biologically active water-soluble phenolic pigments responsible for a wide range of vivid colours, from red (acidic conditions) to purplish blue (basic conditions), present in fruits, vegetables, and coloured grains. The pigments’ stability and colours are influenced mainly by pH but also by structure, temperature, and light. The colour-stabilizing mechanisms of plants ar...
Antitumor Activity of Fucus vesiculosus-Derived Phlorotannins through Activatio...
Catarino, Marcelo D.; Fernandes, Iva; Oliveira, Hélder; Carrascal, Mylène A.; Ferreira, Rita; Silva, Artur M. S.; Cruz, Maria Teresa; Mateus, NunoSeaweeds are one of the largest producers of biomass in the marine environment and a source of multiple bioactive metabolites with valuable health benefits. Among these, phlorotannins have been widely recognized for their promising bioactive properties. The potential antitumor capacity of Fucus vesiculosus-derived phlorotannins remains, however, poorly explored, especially in gastrointestinal tract-related tumo...
Development of functionally graded materials from thermoplastic elastomers waste
Bessa, João; Ramião, Juliana; Cunha, Fernando; Merino, Fernando; Oliveira, Hélder; Amorim, Rui; Fangueiro, RaúlThis work presents thermal and chemical characterization of EVA waste, and their potential to produce functionally graded materials. Moreover, it were also tested the use of blowing agents and PU foams in order to promote better properties in terms of thermal resistance and different type of mechanical properties along its thickness.