The region of Beira Alta, Portugal distinguishes itself as a favorable area for apple growing that produces fruits with great economic importance. The polyphenoloxidase (EC 1.14.18.1, PPO) a copper-enzyme located in plastids, catalyzes the oxidation of phenols to quinones present in the vacuoles, generating brown coloration products. In general, the enzymatic browning occurs when phenolic compounds are released...
The determination of functional value of a particular food includes the discovery and characterization of their antioxidant properties, as its phenols contents, its ability to scavenge reactive oxygen species (ROS) or its biological activity to reverse oxidative stress markers, as triggered by vanadium (V) in eukaryotic models as S. cerevisiae, which exhibit high homology between their enzyme antioxidant respon...
Apple juices are described as potential inhibitors of oxidative stress preventing chronic disorders such as cancer and cardiovascular disease. Accordingly, the main intention of this study was to evaluate the influence of Golden Delicious apple juice, from Beira Alta, Portugal on cell proliferation of S. cerevisiae UE-ME3 exposed to oxidant, vanadium pentoxide. The results show that 2.0 mM vanadium pentoxide i...
The preservation and expansion of agricultural production require the recognition of specific properties of a product which contribute to increase their market value, since the conditions of soil and climate are important to achieve the properties which characterize and individualized it. Currently the region of Beira Alta, Portugal have a Protected Geographical Status (PGS) called Apple of Beira Alta which inc...
Os resultados mostram que em células crescidas na presença de nanopartículas de titânio ou de pentóxido de vanádio ocorreu um decréscimo significativo de unidades formadoras de colónias, bem como, da actividade específica fosfatase alcalina. Contudo, S. cerevisiae crescidas na presença de pentóxido de vanádio, um pró-oxidante, e sumo de maçã golden mostraram uma reversão significativa da citototoxidade do vanád...
Os resultados mostram que em células crescidas na presença de nanopartículas de titânio ou de pentóxido de vanádio ocorreu um decréscimo significativo de unidades formadoras de colónias, bem como, da actividade específica fosfatase alcalina. Contudo, S. cerevisiae crescidas na presença de pentóxido de vanádio, um pró-oxidante, e sumo de maçã golden mostraram uma reversão significativa da citototoxidade do vanád...
The Malus domestica, Borkh, tients for over 2500 years, was domesticated and expanded in Europe by the Greeks and Romans. Due to their high adaptability to different climates and soils, the apple orchards were quickly installed throughout the world, from countries with relatively cool to subtropical climates. In Portugal, Romans have carried out their introduction and later by religious influence led to the sp...
The Malus domestica, Borkh, tients for over 2500 years, was domesticated and expanded in Europe by the Greeks and Romans. Due to their high adaptability to different climates and soils, the apple orchards were quickly installed throughout the world, from countries with relatively cool to subtropical climates. In Portugal, Romans have carried out their introduction and later by religious influence led to the sp...
A capacidade antioxidante da variedade Bravo de Esmolfe medida pelo DPPH e pelo FRAP manteve-se estável ao longo do período de conservação de 83 dias, a 4 ºC (p <0,05). Por outro lado esta variedade exibiu propriedades de conservação promissoras, tendo em conta o nível baixo e tardio da actividade PPO detectada. O aumento do teor em glúcidos redutores e em fenóis ao longo do período de conservação de 83 dias, c...
As favas maduras de Stryphnodendron obovatum Benth. procedentes de Mato Grosso, administradas a sete vacas com 3 a 7 meses de gestação, na dose de 5 g/kg/dia, durante 9 a 26 dias, causaram doença caractrizada por diminuição do apetite, diminuição da atividade ruminal, sialorréia, dificuldade em se levantar, andar desequilibrado, tremores musculares, acentuado emagrecimento e finalmente em 3 das 7 vacas, aborto ...
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