Grape maturation optimal

The extensive number of cultivars in the Douro and their adaptation to its different climatic conditions are proof of the region s ability to offer optimal conditions for vine growth and fruit maturation. There are more than 150 grape varieties, a substantial portion of which originated in the region (Cardoso and Silva, 2007). However, the grape varieties that... 

Vincent, D., Wheatley, M.D. and Cramer, G.R. (2006) Optimization of protein extraction and solubilization for mature grape berry cluster, Electrophoresis, 27, 1853-1865. 

The organoleptical quality of tannins is directly related to maturation conditions. Enologists have defined this quality in terms of good tannins and bad tannins. The chemical understanding of these phenolic compounds has made it possible to make a better choice of winemaking techniques that optimize the quality of various kinds of grapes. A perfect state of phenolic maturity not only supposes a maximum tannin concentration it also corresponds to soft, non-aggressive, non-bitter tannins. 

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