Production of low-calorie candied fruits was investigated by substituting sucrose with fructose, maltitol, sorbitol and actilight. Quality of candied fruits was evaluated with respect to yields obtained for the fruit candied process, chemical composition, microbial growth, rheological characteristics, color, and sensory attributes. The sensory attributes investigated were influenced by the osmotic agent used. E...
Cold stabilization is the most common wine operation for wine tartaric stabilization. This operation consists in cooling the wine at temperatures near the wine freezing point [1, 2], to induce potassium bitartrate crystals precipitation. However, this is a slow and costly operation. Electrodialysis is a process that allows the separation of anions and cations according to their electrical charge through a selec...
The result of the continuous evolution in Telecommunications is the growing easiness to access information, and the emergence of the so called Information Society. The final consequence of such situation, is the development of nations and the well-being of their citizens. This paper focuses the ISDN, and the steps that have been taken in order to transform it in the basic and funda...
As castas Malvasia Fina e Gouveio da Região Demarcada do Douro originam vinhos com propriedades organoléticas muito características. A casta Malvasia Fina caracteriza-se, por dar origem a um vinho elegante e fino, com pouca intensidade e complexidade, tanto no aroma como no gosto. Já a casta Gouveio por sua vez caracteriza-se, por originar um vinho de cor citrina, frutado, fresco, vivo e com riqueza ácida. Assi...
As proteínas, embora em reduzida concentração no vinho branco, podem ser fatores de instabilidade, e podem afetar a limpidez e/ou originar depósitos amorfos. Para prevenir a instabilidade proteica é tradicionalmente efetuada a colagem dos vinhos brancos com bentonite. Contudo, esta cola inorgânica apresenta algumas limitações, particularmente quando aplicada em doses elevadas. Neste contexto, foram avaliadas vá...
A instabilidade proteica é um defeito que pode conduzir à rejeição do vinho. A desnaturação e precipitação das proteínas instáveis, podem afetar a limpidez e/ou originar depósitos amorfos. A concentração e composição das proteínas, dependem da casta, condições climáticas, estado de maturação das uvas e da vinificação. A colagem com bentonite é o processo mais comum na prevenção desta instabilidade, mas apresent...
This thesis presents de development of a surveillance system, based on a PC Windows platform, focusing on the integration of the support for videotelephony equipment compliant to the ITU-T's H.320 recommendation. (...)keywords: video surveillance; ISDN; videotelephony; H.320; computer telephony; PC video; SIVIL; interoperability; modularityM.S., 1999more info. - http://opac.ua.pt/F/?func=find-b&fi...
Wine haze formation is mainly due to protein insolubilization and precipitation. This problem affects considerably its commercial acceptance. Wine protein instability may be due to intrinsic or extrinsic factors, such as proteins molecular weight, isoelectric point, ionic strength, alcohol degree and wine pH or due to inadequate storage temperature.
This presentation intends to make a brief description of the studies being investigated by our research group in the area valorization of fibrous feed utilizing the white-rot fungi (basidiomycetes fungi) enzyme complexes.
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