Só está disponível o resumo. ; Sugar composition, phenolic content and antioxidant activity of P. tridentatum aqueous extracts: micropropagated shoots vs wild plants.
‘Rainha Claudia Verde’ is a regional cultivar of Prunus domestica L. well adapted to a specific region in the south of Portugal. In order to understand the postharvest behavior of this cultivar produced in different orchards, cell wall poly-saccharides and cell wall calcium fruit content were studied during ripening in two consecutive years. During harvest period pectic fractions soluble in water, carbonate and...
Brewers´ spent grain (BSG) is a by-product from beer industry that can be exploited as a source of arabinoxylo-oligosaccharides (AXOS) with prebiotic activity. In this study, microwave-assisted extractions were performed during 2 min at 140-210°Cin order to evaluate the feasibility of this extraction technology for quantitative extraction of the arabinoxylans (AX) or AXOS from BSG. The AX yield increasedwith...
Resumo não disponível.
In this work, the effect of high hydrostatic pressure (HHP) treatment of wine, as substitute of SO2, was evaluated by quantification of microbial load, antioxidant capacity, and colour. For this purpose, red wine of two consecutive harvests (2008 and 2009) was produced without the addition of SO2. At the end of the alcoholic fermentation, the wine was pressurized at 350 MPa for 20 min at 20 ºC. After nine month...
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A adição de sulfuroso nas diferentes etapas de vinificação tem por objectivo impedir o crescimento microbiológico de espécies nocivas ao vinho, assim como actuar como antioxidante, mantendo as características sensoriais do vinho. Contudo, os produtores têm procurado reduzir a utilização de sulfuroso dada a sensibilidade alérgica a este composto por cerca de um terço dos consumidores. Neste trabalho, testaram-se...
A adição de sulfuroso nas diferentes etapas de vinificação tem por objectivo impedir o crescimento de microrganimos nocivos ao vinho, bem como actuar como antioxidante, mantendo as características sensoriais do vinho. Contudo, os produtores têm procurado reduzir a utilização de sulfuroso dada a sensibilidade alérgica a este composto por cerca de um terço dos consumidores. Neste trabalho foram testados diferente...
The combination of pre-treatments with natural matrices processing may induce higher extraction yields andlor reduce the treatment times involved. In this essay, the application of a high pressure treatment prior to the supercritical fluid extraction of grape seed (Vitis vinifera) oil has been investigated. Experiments show that, under the operating conditions adopted, the final extraction yield slightly decrea...
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