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Tannins are a natural preservative in wine. Un-aged wines with high tannin content can be less palatable than wines with a lower level of tannins. Tannins can be described as leaving a dry and puckered feeling with a "furriness" in the mouth that can be compared to a stewed tea, which is also very tannic.
The astringency from the tannins is what causes the dry and puckery feeling in the mouth following the consumption of unripened fruit, red wine or tea. [2] Likewise, the destruction or modification of tannins with time plays an important role when determining harvesting times.
Wine contains natural preservatives such as tannin, sugar and alcohol, [2] and can be preserved through physical preservation methods, such as storage at an appropriate temperature. [3] However, bacterial growth is still possible, so chemical preservatives are added to most wines.
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A new study from UC Davis looks at the properties of red wine that result in a headache. Here's what the study says, and what it means for a wind-down drink. Actually, Tannins Might Not Be Causing ...
Cooking with alcohol means using alcohol in the preparation of food either as an ingredient, a cooking fuel, or for visual display. Wine is frequently used as an ingredient for its acidic properties, its bitter tannins, and its fruit components. Beer and liqueurs are also commonly used as alcoholic ingredients.
Cooking with wine can be totally confusing. “Unless you’re making a sweet dish, choose a low-alcohol wine with some acidity that’s fresh with a little fruit on the nose.”
Wine is a complex mixture of chemical compounds in a hydro-alcoholic solution with a pH around 4. The chemistry of wine and its resultant quality depend on achieving a balance between three aspects of the berries used to make the wine: their sugar content, acidity and the presence of secondary compounds.