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Do bioactive carotenoids contribute to the color of edible mushrooms?
Ribeiro, Bárbara; Pinho, Paula Guedes de; Andrade, Paula B.; Oliveira, Carla; Ferreira, António César Silva; Baptista, Paula; Valentão, PatríciaCarotenoids are biologically active phytochemicals present as micro-components in fruits and vegetables, being responsible for their yellow, orange and red colors. The chromatographic behavior and the UV absorption spectrum provided by HPLC-DAD analysis constitute the clues for their identification. Mushrooms are of increasing importance in modern nutrition and medicine, due to the presence of metabolites with ...
Relevant principal component analysis applied to the characterisation of Portug...
Martins, Rui C.; Lopes, Victor V.; Valentão, Patrícia; Carvalho, João C. M. F.; Isabel, Paulo; Amaral, Maria T.; Batista, Maria T.; Andrade, Paula B.The main purpose of this study was the characterisation of ‘Serra da Lousã’ heather honey by using novel statistical methodology, relevant principal component analysis, in order to assess the correlations between production year, locality and composition. Herein, we also report its chemical composition in terms of sugars, glycerol and ethanol, and physicochemical parameters. Sugars profiles from ‘Serra da Lousã...
Do cultivar, geographical location and crop season influence phenolic profile o...
Amaral, Joana S.; Valentão, Patrícia; Andrade, Paula B.; Martins, Rui C.; Seabra, Rosa M.Walnut leaves from nine different cultivars (Arco, Franquette, Hartley, Lara, Marbot, Mayette, Meylannaise, Parisienne and Rego) were studied for their phenolic compounds. Samples were harvested along three consecutive years, at two different geographical locations, in order to evaluate if significant differences in the phenolics composition can be related with genetic, climatic or geographical factors. Nine co...
Water and methanolic extracts of Salvia officinalis protect HepG2 cells from t-...
Lima, Cristóvão F.; Valentão, Patrícia; Andrade, Paula B.; Seabra, Rosa M.; Ferreira, Manuel Fernandes; Wilson, Cristina PereiraCommon sage (Salvia officinalis L., Lamiaceae) is an aromatic and medicinal plant well known for its antioxidant properties. Some in vivo studies have shown the biological antioxidant effects of sage. However, the intracellular antioxidant mechanisms of action are still poorly understood. In this study, we evaluated the cytoprotective effects of two sage extracts (a water and a methanolic extract) against tert-...
Limonete, Hipericão-do-Gerês, Cardo-do-Coalho, Fel-da-Terra : Metodologias de c...
Valentão, Patrícia Carla RibeiroNeste trabalho foram estudadas quatro espécies medicinais de grande consumo em Portugal: Lippia citriodora (Limonete), Hypericum androsaemum (Hipericão-do-Gerês), Cynara cardunculus (Cardo-do-Coalho) e Centaurium erythraea (Fel-da-Terra).Embora a caracterização química do Limonete e do Fel-da-Terra, definida em Farmacopeias, seja feita através da detecção de compostos terpénicos, foi objectivo deste trabalho pr...
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