Repository logo

Browsing by Author "Almeida, Diana"

Now showing 1 - 3 of 3
  • Hardy kiwifruit leaves (Actinidia arguta): an extraordinary source of value-added compounds for food industry
    Publication . Almeida, Diana; Pinto, Diana; Santos, Joana; Ferreira da Vinha, Ana; Palmeira, Josman; Ferreira, Helena N.; Rodrigues, Francisca; Oliveira, M. Beatriz P.P.
    The present study reports for the first time the identification and quantification of phenolic compounds, the antioxidant and antimicrobial activities as well as the in vitro radical scavenging activity and intestinal cell effects of A. arguta leaves extracts. Extractions were carried out under water, water:ethanol (50:50) and ethanol. The highest antioxidant activity were obtained in alcoholic extract (IC50 = 53.95 ± 3.09 μg/mL for DPPH; 6628.42 ± 382.49 µmol/mg dry weight basis for FRAP) while the phenolic profile confirmed by HPLC analysis revealed highest amounts of phenolic acids (hydroxycinnamic acid derivatives) and flavonoids (flavan-3-ol and flavonols derivatives). An excellent scavenging activity against reactive oxygen and nitrogen species were determined for all extracts as well as no adverse effects on Caco-2 and HT29-MTX cells in concentrations below 100 μg/mL and 1000 μg/mL, respectively. These results highlight the potentialities of hardy kiwi leaves valorization.
    2018-09Journal article Open access Show more
  • A influência da reeducação postural global na flexibilidade em nadadores federados do escalão infantil
    Publication . Almeida, Diana; Amaral, Luísa
    Introdução: A flexibilidade é reconhecida como uma qualidade motora indispensável na área desportiva. Uma das técnicas mais usadas no âmbito da fisioterapia que visa a manutenção ou aumento da amplitude de movimento e, consequentemente previne recidivas ou o aparecimento de lesões, é o alongamento. Objetivo: Analisar a influência do alongamento através da Reeducação Postural Global (RPG) na flexibilidade em nadadores federados do escalão Infantil. Metodologia: A amostra constituída por 19 nadadores foi dividida em dois grupos (controlo e experimental). No grupo experimental foi aplicado um protocolo de alongamento segundo a RPG (três posturas), durante 4 semanas, 2 vezes por semana. Ambos os grupos foram submetidos a uma avaliação inicial e final, tendo-se usado como instrumento o flexiteste, o teste do 3ºdedo-solo e o teste de extensão do tronco. Resultados: Verificou-se um aumento significativo dos níveis de flexibilidade no grupo experimental face ao grupo de controlo quando comparamos os dois momentos de avaliação (p≤0,05). Conclusão: A RPG demonstrou ser capaz de incrementar as amplitudes de movimento nos nadadores submetidos ao protocolo.
    2013Bachelor thesis Open access Show more
  • Preliminary study of Actinidia arguta leaves as source of bioactive compounds
    Publication . Almeida, Diana; Pinto, Diana; Rodrigues, Francisca; Ferreira da Vinha, Ana; Oliveira, M. Beatriz P.P.
    Actinidia arguta, commonly known as baby kiwi, is an abundant seasonal fruit in Asia, being recently introduced in Europe. The fruit is now available in Portugal, leading to a high consumer attention. During the baby kiwi harvest, a large amount of leaves falls and stay in the soil. To the best of our knowledge, few studies concerning their composition are reported. The aim of this study is to determine and compare the total phenolic and flavonoid contents (TPC and TFC, respectively) as well as the antioxidant activity (through DPPH and FRAP assays) of leaf extracts from different baby kiwi cultivars. The extracts were obtained taking into consideration sustainable conditions (namely solvents and temperatures).
    2018Conference object Restricted access Show more