Dagui Town, Dafeng City, Liu Guijun, December 23, 2010, came to the phone and asked how the persimmon was shredded and crisp.
Persimmon fruit contains a special kind of cell, and its plasmin contains many tannins. The vast majority of the tannins in the fruit of the astringent persimmon are present in the tannin cells in a soluble state. After puncturing the fruit, the tannins flow out and are dissolved by the saliva, making the person feel strongly astringent. Destringency is the conversion of soluble tannins to insoluble tannins.
Hard persimmon feeding, after the astringent persimmon fruit crispy and sweet, sweet, you can take the following methods to remove astringent.
Astringency of warm water will put fresh persimmon fruit into aluminum pan or jar (can not use iron container to prevent chemical change of iron and tannin, affect quality), pour warm water of about 40°C to submerge persimmon fruit, Sealed cylinder port, isolated air circulation. The key to de-astringency in warm water is to control the water temperature, and the water temperature should be maintained at 40°C. The water temperature is too low, and the dehydration is slow; when the water temperature is too high, the pericarp is easily cracked, the pulp is water-stained, the fruit color is brown, and the activity of the enzyme is inhibited or destroyed. The astringency is still very strong after treatment. The method of maintaining the temperature varies depending on the specific conditions, and it may be heated or wrapped with glutinous rice straw, wheat straw, etc., or may be mixed with hot water for a certain period of time. The length of the astringent time is related to the variety and maturity. Generally, the astringent time can be removed within 10 to 24 hours. Using this method to remove astringent, the taste of persimmon is slightly light, and it cannot be stored for a long time. After 2 to 3 days, the color becomes brown and soft, and it cannot be removed from the astringent mass.
Cold water is more than astringent in the South, the persimmon fruit into the basket, even the basket immersed in the pond, after 5 to 7 days change can be astringent; or the persimmon fruit into the water in the tank, the water to flood the persimmon, the water taste When you need to change the water, you can also add 1~2 kilograms of persimmon leaves in 50 kilograms of cold water, pour the persimmon fruit into water and cover it with rice straw. After 5~7 days, remove the astringent. Although it is a long time to cool off the astringent, it does not need to be warmed, and no special equipment is required. The fruit is also more fragile than the warm water.
Astringency of lime water Each aliquot of per kilogram of persimmon lime is 1~2 kg. Take a small amount of water to dilute the lime and then add water to dilute it. The amount of water should submerge the persimmon fruit, and the astringent can be removed after 3~4 days. With this method, the persimmon fruit is particularly brittle and has a good effect on freshly colored and less mature fruits. However, a layer of lime is attached to the surface of the fruit after the astringency, which is not very beautiful. Improper handling can also cause cracking.
Carbon dioxide is removed from the astringent. Persimmon fruit is packed in a sealed container. A small hole is drilled above and below the container. Carbon dioxide is injected slowly into the bottom hole. When the gas discharged from the small hole above can extinguish the lighted match, the container has been Filled with carbon dioxide, they plug the hole. The speed of astringency is related to the species and carbon dioxide concentration. The temperature is 25~30°C. It can be removed within 7~10 days under normal pressure. If it is pressurized to 7~11 kg, the temperature is maintained at about 20°C. After 2~3 days, Edible. Add a small amount of alcohol in the container to speed up the astringent. After removing the astringent, remove the persimmon fruit and put it in a ventilated place. The irritating gas can be consumed after being volatilized. Using this method requires a certain equipment, suitable for bulk astringent.
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