Why are the apples, pears, and other fruits that have gone to skin become black? It's a pity that the blackened fruit has been thrown. Oh, eat it, and fear that it will hurt the body. Normally, when we eat fruit, the fruit will be washed and peeled, and the flesh will have direct contact with the air. Under the action of oxygen contained in the air, phenols contained in fruits, such as catechins, react with polyphenol oxidases in fruits to cause enzymatic browning reactions and form melanin, which is what we often say. The fruit of the skin turns black. After the fruit is peeled and blackened by oxidation, the color does not look good, and the nutrition also loses a lot. Fruits contain several phenolic substances that are beneficial to the body, such as catechol, which can both resist oxidation, soften blood vessels, and delay aging. However, once the fruit is oxidized and discolored, these phenolic substances will lose their original health care functions and the nutrients of the fruit will be lost. Is there any way to prevent the discoloration of fruit and ensure that the nutritional content of the fruit is not lost? In fact, the method is very simple. We can put the peeled or diced fruit into clean water (preferably cold and white) for half an hour, and soak the fruit completely in water. In other words, the height of the water must not have fruits. This will not only prevent fruit color from changing, but will also not affect the loss of nutrients. Soaking in water can avoid the discoloration of fruit. The reason is that the peeled fruit and pulp are exposed to oxygen in the air. The amount of oxygen in the water is much lower than in the air. Dipping the peeled fruit in water to isolate it from oxygen can prevent this discoloration reaction from taking place and also reduce the loss of nutrients. Unless fruits are particularly stressed after peeling, they need to be soaked in salt water, such as pineapple. It is generally not recommended to soak the peeled fruit with salt water so as not to affect the original flavor of the fruit. Peel the fruit as much as possible to reduce the storage time, eat with the skin. Even when wrapped in cling film, it seems to be isolated from the oxygen in the air, but otherwise it will be oxidized to black. Nucleic Acid Extraction System Nucleic Acid Extraction Kit,Nucleic Acid Purification Kit,Nucleic Acid Extraction System,Nucleic Acid Extraction Instrument HANGZHOU DIAN BIOTECHNOLOGY CO., LTD. , https://www.dianbiotech.com