2007
2007
O bicudo-do-algodoeiro (Anthonomus grandis) e a lagarta do cartucho (Spodoptera frugiperda) são insetos que causam perdas significativas para a agricultura devido aos danos causados à cultura do algodão. Estratégias biotecnológicas utilizam proteínas envolvidas com a defesa de plantas, incluindo as d-endotoxinas e os inibidores de a-amilases (aAIs), como ferramentas no desenvolvimento de plantas resistentes aos...
2005
A multivariate data matrix containing a number of missing values was obtained from a study on the changes in colour and phenolic composition during the ageing of port. Two approaches were taken in the analysis of the data. The first involved the use of multiple imputation (MI) followed by principal components analysis (PCA). The second examined the use of maximum likelihood principal component analysis (MLPCA)....
Fortified wines which suffer extended periods of wood ageing develop characteristics which in many cases define the product. An important component of this style is contributed by the specific phenolic compounds and furans which are either extracted from the wood or formed during the barrel ageing process. An HPLC method is presented here for the determination of phenolic compounds and furans in wood aged forti...
Studies have been carried out on red and white monovarietal wines vinified during the 1995, 1996 and 1997 harvests. The essential aim being to evaluate sensory quality, correlate it with chemical analytical data and relate these to the various winemaking options available. Hence selective native varieties from the Douro, Dao, Bairrada and Vinhos Verdes regions have been studied and the analytical / sensorial da...
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