It is to do with the fermentation process, the concentration of alcohol is differed and hightened based on the amount of water in the wine, and expense.
Sweetness in wine is the result of sugar that is left unfermented. If the grapes have naturally high levels of sugar the wine will be sweet without any intervention because once the wine reaches a certain level of alcohol the yeasts that change the sugar into alcohol die. This point will vary with the chosen strain of yeast used. The process can also be stopped early to allow for a lighter, low alcohol sweet wine. Chilling the wine down will stop the fermentation, leaving the grape's natural sugar behind. Filtering can remove the yeasts themselves, bring fermentation to an end immediately. Sweet wines are frequently low in alcohol, unless they are "fortified" by a spirit (i.e port). Fortification is another way to prematurally haul fermentation because yeasts are intolerant of high levels of alcohol.
Alcohol, specifically, ethanol (C2H5OH)
Yes, dealcoholized wine has only a trace amount of alcohol remaining, but it is fermented in the usual fashion to give it other wine qualities. In other words, you will not get drunk or high on dealcoholized wine but you can still enjoy its flavor and body.
The alcohol content of wine is not determined by brand. This is because wine is a natural product, in some years the harvest will be sweet and the wine will have high alcohol and in other years the sugar content of the grapes will be lower. Thus the alcohol content is determined by crop success not brand.
Wines that have the highest concentration of alcohol are called fortified wines. Alcohol content in fortified wine can be as high as 18%, and happens when the yeast dies which adds more alcohol to the wine.
Age has nothing to do with blood alcohol levels, but how much you drink and how you metabolize the alcohol. A glass of wine with dinner is about all you can do to keep it under DUI levels.
Wine and beer production converts sugar to alcohol without distilling. However, the yeast that performs this process will die off at high alcohol levels, the reason it is difficult to produce any beer or wine with more than a 20% alcohol content. Nearly all alcohol product that has a higher percentage is distilled, but there are exceptions using special processes to get close to 30%.
No Yes, definitely. Effervescence causes alcohol to be absorbed into the bloodstream more quickly. And, of course, a sparkling wine such as champagne will also cause more rapid alcohol absorption.
A fortified wine is a wine that has had a spirit added to it in its fermentation stage. This adds a different flavor to the wine as well as preserving it. the sweetness of the wine is usually determined by when the alcohol is added in the fermentation stage, the sooner, the sweeter.
Not normally. They contain a great deal of sugar. It is possible that 'fox grapes' will occur. A hard frost will damage the grape and yeast will get into it and start the fermentation process. This can cause the grapes to have an alcohol content.
If you mean, what makes alcohol in wine? It's simple - sugar in grapes. During fermentation, sugar in the grapes turns into alcohol.
The sugar concentration in wine grapes directly impacts the alcohol concentration of the wine produced from those grapes. During the fermentation process, yeast converts sugar into alcohol. Higher sugar levels in the grapes will result in a higher alcohol content in the wine.