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Synergisms in antioxidant and anti-hepatocellular carcinoma activities of artic...
Pereira, Carla; Calhelha, Ricardo C.; Barros, Lillian; Queiroz, Maria João R.P.; Ferreira, Isabel C.F.R.Artichoke, borututu and milk thistle are three medicinal plants well-known for their capacity to prevent oxidative stress and many liver diseases. In a previous work, we reported the bioactivity of infusions and pills based on these plants; herein, the aim was to provide scientific information about the antioxidant and anti-hepatocellular carcinoma activities of syrups based on these medicinal plants and evalua...
Exploring the antioxidant potential of Helichrysum stoechas (L.) Moench phenoli...
Barroso, Marisa; Barros, Lillian; Dueñas, Montserrat; Carvalho, Ana Maria; Santos-Buelga, Celestino; Fernandes, Isabel P.; Barreiro, M.F.The present work explores the antioxidant potential of Helichrysum stoechas (L.) Moench phenoliccompounds for cosmetic applications involving the following steps: chemical characterization, microen-capsulation and incorporation into a moisturizer. Eighteen different phenolic compounds were identifiedin flowering aerial parts (decoction and hydroalcoholic extract), being 3,5-O-dicaffeoylquinic acid andmyricetin ...
Nutritional composition, antioxidant activity and phenolic compounds of wild Ta...
Dias, Maria Inês; Barros, Lillian; Alves, Rita C.; Oliveira, M.B.P.P.; Santos-Buelga, Celestino; Ferreira, Isabel C.F.R.Flowers and vegetative parts of wild Taraxacum identified as belonging to sect. Ruderalia were chemically characterized in nutritional composition, sugars, organic acids, fatty acids and tocopherols. Furthermore, the antioxidant potential and phenolic profiles were evaluated in the methanolic extracts, infusions and decoctions. The flowers gave higher content of sugars, tocopherols and flavonoids (mainly luteol...
Analytical methods applied to the chemical characterization and antioxidant pro...
Reis, Filipa S.; Barros, Lillian; Sousa, Maria João; Martins, Anabela; Ferreira, Isabel C.F.R.The chemical composition and the antioxidant potential of three species of wild mushrooms from Northeastern Portugal, namely Agaricus albertii, Agaricus urinascens var. excellens, and Pleurotus eryngii, were compared. Standard procedures were followed in the nutritional value evaluation, while chromatographic procedures were used to analyze free sugars, fatty acids, tocopherols, phenolic compounds, and organic ...
Antifungal activity of phenolic compounds identified in flowers from the North ...
Alves, Carlos Tiago; Ferreira, Isabel C.F.R.; Barros, Lillian; Silva, Sónia; Azeredo, Joana; Oliveira, Rosário; Henriques, MarianaTo evaluate the antifungal effect of gallic acid, catechin, luteolin and quercetin, phenolic compounds identified from flowers of North Eastern Portugal, against Candida planktonic and biofilm cells. Materials & methods: The MICs were determined in Candida planktonic cells and the effect of phenolic compounds on Candida biofilms was assessed through quantification of CFUs. Results: MIC values demonstrated that ...
Nutritional and antioxidant contributions of Laurus nobilis L. leaves: would b...
Dias, Maria Inês; Barros, Lillian; Dueñas, Montserrat; Alves, Rita C.; Oliveira, M.B.P.P.; Santos-Buelga, Celestino; Ferreira, Isabel C.F.R.Medicinal and aromatic plants are used since ancient times in folk medicine and traditional food, but also in novel pharmaceutical preparations. The controversy lies in the use of cultivated and/or wild plants presenting both advantages and disadvantages in biological, ecological but also economic terms. Herein, cultivated and wild samples of Laurus nobilis L. were chemically characterized regarding nutritional...
Bioactivity of different enriched phenolic extracts of wild fruits from Northea...
Guimarães, Rafaela; Barros, Lillian; Calhelha, Ricardo C.; Carvalho, Ana Maria; Queiroz, Maria João R.P.; Ferreira, Isabel C.F.R.Arbutus unedo, Prunus spinosa, Rosa micrantha and Rosa canina are good sources of phenolic compounds, including anthocyanins. These compounds have potent antioxidant properties, which have been related to anticancer activity. Herein, the in vitro antioxidant and antitumor properties of enriched phenolic extracts (non-anthocyanin phenolic compounds enriched extract- PE and anthocyanins enriched extract- AE) of t...
Decoction, infusion and hydroalcoholic extract of Origanum vulgare L.: differen...
Martins, Natália; Barros, Lillian; Santos-Buelga, Celestino; Henriques, Mariana; Ferreira, Isabel C.F.R.Bioactivity of oregano methanolic extracts and essential oils is well known. Nonetheless, reports using aqueous extracts are scarce, mainly decoction or infusion preparations used for therapeutic applications. Herein, the antioxidant and antibacterial activities, and phenolic compounds of the infusion, decoction and hydroalcoholic extract of oregano were evaluated and compared. The antioxidant activity is relat...
Antibacterial potential of Northeastern Portugal wild plant extracts and respec...
Pinho, Eva; Ferreira, Isabel C.F.R.; Barros, Lillian; Carvalho, Ana Maria; Soares, Graça; Henriques, MarianaThe present work aims to assess the antibacterial potential of phenolic extracts, recovered from plants obtained on the North East of Portugal, and of their phenolic compounds (ellagic, caffeic, and gallic acids, quercetin, kaempferol, and rutin), against bacteria commonly found on skin infections. The disk diffusion and the susceptibility assays were used to identify the most active extracts and phenolic compo...
Castanea sativa Mill. flowers amongst the most powerful antioxidant matrices: a...
Carocho, Márcio; Barros, Lillian; Bento, Albino; Santos-Buelga, Celestino; Morales, Patricia; Ferreira, Isabel C.F.R.Infusions and decoction of chestnut tree flowers have been used for different medical purposes, but their phytochemical profile and antioxidant activity are still mostly unknown. Herein, decoctions and infusions of flowers from the two most appreciated chestnut cultivars (longal and judia) in Tr´as-os-Montes, Portugal, were prepared and characterized with regard to their content in free sugars, organic acids, a...
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