Phenolic content in wine the ellagic and gallic acid found in the wood. In the vineyards, there is also a growing distinction being made between "ripe" and "unripe" tannins present in the grape. This "physiological ripeness", which is roughly determined by tasting the grapes off the vines, is being used along with sugar levels as a determination of when to harvest. The idea is that "riper" tannins will taste softer but still impart some of the texture components found favorable in wine. In winemaking, the amount of the time that the must spends in contact with the grape skins, stems and seeds will influence
Mexican wine by clergy. The Santo Tomás Mission, founded in Baja California by Jesuit priests in 1791, reactivated larger scale production of wine in Mexico. In 1843, Dominican priests began growing grapes at the nearby Nuestra Señora de Guadalupe del Norte mission, located in what is now called Valle de Guadalupe. This valley is one of the few in the world, along with others such as the Napa Valley and the Rhone Valley, in which premium wine grapes can be grown. In the 1850s, as part of Mexico’s Reform War, many of the Church’s land holdings were taken by the state. Most