It is an official definition of wine . Here it is: "the wine is the product obtained exclusively from the total or partial alcoholic fermentation of fresh grapes, whether or not crushed, or musts grape . "
In plain language this means that we take care of your arteries and your pleasures. The wine is a product subject to the regulations stricter, for the well being of everyone. Obviously, more naturally and without seeking to define, the wine is simply the result of fermentation of a fruit, the grape .
Ferment it means that instead of rot and die stupidly by oxidizing in the open, the fruit will turn and give another life by placing it under specific conditions: the absence of air and by controlling the temperature. And then, the sugar content in grapes , especially in the pulp, which, under the action of yeast, into alcohol. Yeasts are the same as for making beer or bread. These are microorganisms that occur naturally on the fruit (native) or that can be added into the tanks. To make 1 ° alcohol, yeasts consume 17 g of sugar. As an average, in the grape , found 200 grams of sugar, one automatically reaches 12 ° alcohol.
So we will have more sugar in the grapes , the more it will be high in alcohol. This explains why in the south, with the sun heats the grapes into alcohol levels go up very quickly. Fermentation is complete when there are less than 2 grams of sugar per liter. Yeasts have nothing to eat and more alcohol kills them.
The wine , it is not yet fully born. He still has a few stages, the malolactic fermentation of red wines systematic, optional on white wines , and then most importantly, in barrel or tank . It will explain in another article.
Keep in mind that wine is the fruit of the resurrection of the grape that instead of dying becomes a pleasure.
I can be searched badly, but I can not find your article on wine tanks. I wish I read it ...