The formula of wine fermentation principle is as follows:
Namely: sugar+yeast = alcohol+carbon dioxide.
Because grapes contain sugar, when sugar meets yeast, and there is a suitable fermentation environment and temperature, carbon dioxide is naturally produced, so gas will appear in homemade wine.
Don't choose mildewed grapes when brewing wine. It's better to sterilize the grapes to kill harmful bacteria. In addition, self-brewed wine should be self-brewed, and adding water or wine is wrong. It should also be noted that a lot of gas will be produced during the fermentation of homemade wine. Never use plastic bottles, aluminum utensils, etc. to hold it, but use wooden barrels.
Extended data
First, the composition of wine
1, 80% water. This is pure water in the biological sense, which is directly drawn from the soil by vines.
2, 9.5%-15% ethanol, that is, the main alcohol. After sugar fermentation, it is slightly sweet and gives wine an aromatic taste.
3. acid. Some come from grapes, such as tartaric acid, malic acid and citric acid; Some are produced by alcohol fermentation and lactic acid fermentation, such as lactic acid and acetic acid. These main acids play an important role in the acidic flavor and balanced taste of wine.
4. Phenolic compounds. Per liter 1~5g, they are mainly natural red pigments and tannins, which determine the color and structure of red wine.
5. 0.2~5g sugar per liter. Different types of wine contain different amounts of sugar.
6, aromatic substances (hundreds of milligrams per liter), they are volatile, many kinds.
7. Amino acids, protein and vitamins (C, B 1, B2, B 12, PP) affect the nutritional value of wine.
Therefore, drinking wine in moderation is beneficial to human health, which can protect blood vessels, prevent arteriosclerosis and lower cholesterol.
Second, the efficacy of wine
1, nutrition
Moderate drinking of wine can directly affect the nervous system of human body and improve muscle tension. In addition, wine contains a variety of amino acids, minerals and vitamins, which can be directly absorbed by the human body. Therefore, wine can play a good role in maintaining and regulating the physiological function of human body, especially for the weak, people with sleep disorders and the elderly.
2. Special efficacy
The beauty beauty and anti-aging function of red wine comes from the super-strong antioxidant in the wine, in which SOD can neutralize the free radicals produced by the body, protect cells and organs from oxidation, avoid spots, wrinkles and loose skin, and restore the skin's whitening luster.
3, help digestion
Wine contains sorbitol and tannin, which is beneficial to the secretion of bile and pancreatic juice, increases the contractility of smooth muscle fibers in intestinal muscle system, strengthens the digestion and absorption of food in gastrointestinal tract, and can also adjust the function of colon, which has certain curative effect on colitis.
Baidu encyclopedia-wine
Baidu encyclopedia-fermentation