CEBIMED - Congress and other Meeting Presentations/ Apresentações em Congressos e em Outras Reuniões
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- Acorns as a food resourcePublication . Pacheco, R.; Ferreira da Vinha, Ana; Oliveira, M.B.P.P.The oaks (Quercus spp.) comprise the largest genus Fagaceae, an important family of evergreen or deciduous trees of temperate and tropical climatic areas. The acorn is a one-seeded nut, the hard, dry and indehiscent fruit of oaks, derived from a unilocular ovary of fused carpels. Acorns are an interesting source of carbohydrates, fats and fibers and also contain protein, amino acids and vitamins, mostly A and C. Additionally, it has been proven its antioxidant effects. Appreciation of acorn has been increasing, because of its potential as a food resource. The goal of the present review is to compile the published information about nutritional, phytochemical and bioactive composition of acorns.
- Adansonia digitata fruit: compounds and antioxidante activity against reactive speciesPublication . Pinto, Diana; Ferreira da Vinha, Ana; Freitas, Marisa; Oliveira, M. Beatriz P.P.Baobab (Adansonia digitata) is an African native fruit, of which both chemical composition and antioxidant activity against physiologically relevant reactive oxygen species (ROS) and reactive nitrogen species (RNS) were not yet investigated. It is generally accepted that the antioxidant activity of natural resources could be related with the prevention of several diseases. Baobab leaves, fruit pulp, root, stem, seeds and bark have shown medicinal properties, including diuretic, anti-inflammatory, antioxidant, hepato-protective, analgesic, anti-diarrhea, anti-dysentery, anti rheumatoid and antiviral activities.
- Antifungal activity of endemic Origanum virens from PortugalPublication . Soares, M.O.; Ferreira da Vinha, Ana; Lima, R.P.; Coutinho, F.; Catarino, P.Origanum virens is widely used in Portuguese, and Mediterranem, cuizin. Althout it is use as food condiment, it is also used in traditional medicin as antiseptic. The antifungal activity of Origanum virens essential oil on Candida albicans ATCC 10231 and physicchemical characterization of several extracts were evaluated.
- Antimicrobial activity of essential oil of Cymbopogon citratus (DC) Stapf. Poaceae-Gramineae from Angola in ATCC and multidrug resistant strainsPublication . Soares, M.O.; Ferreira da Vinha, Ana; Lima, R.P.; Coutinho, F.; Machado, M.; Catarino, P.Cymbopogon citratus (DC) Stapf. Poaceae-Gramineae (C. citratus) is an herb from India, which grows in several countries in tropical and sub-tropical, as the Republic of Angola, where tea is known as caxinde. This tea is consumed, as aromatic drink, as well as in traditional cuisine due to its lemon flavor. Cymbopogon citratus (DC) is widelly used in folk medicine, where infusions and decoctions, feature anti-spasmatic, carminatives and anti-hypertension properties. The essential oil of C. citratus is often applied, in pharmaceutical industry, as flavor and fragrance, and is also used as a source of new phytochemical molecules for the development of new pharmaceutical products.
- Antioxidant activity and antimicrobial properties of lemon grass essential oilPublication . Ferreira da Vinha, Ana; Soares, M.O.; Barreira, Sérgio; Castro, A.; Alves, R.C.; Oliveira, M.B.P.P.Essential oils have been explored comprehensively as potential sources of compounds with antioxidant and antimicrobial activities.
- Atividade bioterapêutica de plantas medicinais angolanasPublication . Soares, M.O.; Ferreira da Vinha, Ana; Pires, P.; Catarino, P.Os resultados apresentados neste trabalho demonstram que as plantas medicinais Angolanas têm diversas acções terapêuticas, muitas não descritas no seu uso tradicional. O extracto aquoso do Chá de cachinde apresenta um efeito antioxidante elevado e um efeito bactericida. O presente trabalho foi o primeiro a claramente demonstrar que o óleo essencial de Cymbopogon citratus inibe o crescimento do Staphylococcus aureus MRSA, agente patogénico responsável pela maioria das infecções nosocomiais, com concentrações aproximadas de 0,92mM, assim como o St. epidermidis resistente à vancomicina, e a Escherichia coli, transmitido por contaminação fecal-oral, e causadores de infecções hospitalares, que apresentam elevada sensibilidade a este óleo.
- Avaliação in vitro da actividade antioxidante do extracto aquoso de plantas aromáticas com efeitos fitoterapêuticosPublication . Ferreira da Vinha, Ana; Soares, Marta; Pires, Pedro; Machado, MarisaO interesse pela descoberta de novos antioxidantes, a partir de fontes naturais, tem aumentado nos últimos anos, devido ao potencial uso como conservantes alimentares e agentes protetores da oxidação celular.
- Bactericidal effect of essential oil of Angolan Cymbopogon citratus and its majority componentPublication . Soares, Marta Isabel Lopes Rodrigues de; Silva, Andreia; Coutinho, Filipe; Ferreira da Vinha, Ana; Herdeiro, Teresa; Catarino, Pedro; Gárcia Estevez, José M.; Iglesias, Raúl; Machado, MarisaCymbopogon citratus (DC) Stapf. (erva príncipe), Poaceae – Gramineae, originated in India but it is also grown elsewhere in tropical and sub‐tropical as Angola, where this is of great importance in the country's traditional medicine. Is consumed as a beverage aromatic and used in traditionalby its lemon fragrance. It is also used in traditional medicine of almost all continents and covers a wide range of such indications of disorders digestives, infectious, inflammatory, nerve, as well as other health problems. Its use in traditional medicine covers a wide range of indications by tradition, trust, and lack of economic power. The antimicrobial properties of essential oils arouse interest are an alternative to consumers in the natural additive practice as a source of food conservation.
- Baobab fruit: assessment of seed kernel lipid fractionPublication . Passos, Fábio; Nunes, M. Antónia; Pimentel, Filipa; Costa, Anabela S.G.; Ferreira da Vinha, Ana; Oliveira, M. Beatriz P.P.Fruit seeds are important sources of oils for nutritional, pharmaceutical and industrial purposes, despite their differences in fatty acids composition. To study the viability of baobab seed kernel valorization as a new alternative edible oil source, it is essential to characterize its lipid fraction. Oil was obtained by Soxhlet extraction with petroleum ether (2.5 h). Fatty acid methyl esters (FAME) were then analyzed by GC, in a Shimadzu GC-2010 gas chromatograph with a flame ionization detector (Shimadzu, Columbia). Vitamin E profile (α, β, γ and δ-tocopherols and α, β, γ and δ-tocotrienols) was determined by NP-HPLC/DAD/FLD, in an HPLC integrated system (Jasco, Japan).
- Bioactive compounds and reducing ability of medicinal herbal infusions: a regard over their labelsPublication . Baptista, N.; Costa, A.; Ferreira da Vinha, Ana; Nunes, A.; Alves, R.; Cunha, L.M.; Oliveira, M.B.P.P.Consumer interest in a healthy diet has been growing exponentially. Consequently, food industries provide, nowadays, an increasing number of products (including teas and infusions) that label beneficial health and/or well-being effects. In this work, a preliminary survey of several herbs commonly used in commercial mixtures for infusions (horsetail, lemongrass, green tea, fennel, St. John’s wort, senna and tilia) was performed. Infusions of single plants (n=13) and mixtures (n=18) were analyzed and their labels verified in order to identify possible gaps in their claims. Total phenolics, total flavonoids and tannins contents, as well as the reducing ability (using FRAP assay) of samples, were determined.