At the moment when vegetables and fruits are harvested in the farmland and meat is cut off from poultry, the nutrients of these harvested ingredients begin to gradually lose, and even go to the point of decay. In order to avoid this behavior of squandering natural resources, people have been trying to think of various ways to slow down the deterioration of food, such as air drying, pickling, placing in ice cubes, etc., and finally invented it.

After the food loses its life, the nutrients begin to lose

What is more curious is, do the nutrients begin to lose bit by bit before the food is spoiled? According to nutritionist Chen Yunfan, "When the food loses its life, it will continue to oxidize inside, producing bad bacteria, and begin to lose nutrients until it decays. Moreover, if it is squeezed physically during harvesting, or if it is stored in a bad environment after harvesting, exposed to direct sunlight or the temperature is too high, it will accelerate the decay of the food. In order to prolong the shelf life of food, nutritionist Chen Yunfan also put forward two methods:

1. Reducing water activity: air drying, or pickling with high salt or sugar content, so as to reduce water activity in food and increase food life.

2. high temperature sterilization: milk, for example, goes through a series of sterilization processes before it can be drunk.

Reducing water activity and high-temperature sterilization will destroy the original flavor of food

But the way of reducing water activity will destroy the taste and mouthfeel of food itself. For example, fresh squid is air-dried into dried squid, or cabbage is pickled into kimchi, which is quite different from the original taste of ingredients. Strictly speaking, this method is obviously not suitable for making ingredients original flavor. However, the freshly squeezed milk, after the process of high-temperature sterilization, will also begin to produce bad bacteria and gradually deteriorate. It can be seen that high-temperature sterilization can not fully meet the needs of delaying food deterioration. Germany LIEBHERR refrigerator SBSes7155

healthy fresh-keeping technology and direct cooling/air-cooling dual cooling system can retain more nutrition

since nutritionist Chen Yunfan mentioned it; "If the temperature is too high, it will speed up the decay of ingredients. Looking at it from another angle, if food is stored at a proper temperature, it can inhibit the reproduction of bad bacteria and delay the decay of ingredients. Therefore, the refrigerator has become one of the necessary household appliances for every family, especially for Taiwan Province people living in the subtropical zone, who rely on the refrigerator to store all kinds of ingredients. Many people think that putting food in the refrigerator is like putting on protective clothing, which is durable, fresh and secure. Is this true? It is best to buy food in moderation and eat it fresh, but when it is necessary to use the refrigerator to store food, the preservation ability of the refrigerator becomes the key; With the modern people's eating habits and health considerations, the function of refrigerator is brought forth new ideas. LIEBHERR refrigerator in Germany launched the exclusive "BioFresh Healthy Fresh-keeping Technology", which can accurately maintain the refrigerator temperature at about 1 C and maintain appropriate humidity to improve the fresh-keeping ability, so that food can be kept fresh for a long time. In addition to preserving the delicious taste of food, it can also completely preserve the nutrients of food, which can be improved by more than three times compared with the previous ordinary refrigerators. Taking the preservation of fruits and vegetables as an example, the retained vitamin C is 92% more than that of the general traditional refrigerator, almost reaching 1 times; There is also a "direct cooling/air cooling dual cooling system". The direct cooling technology reduces water loss and preserves the freshness and charming flavor of fresh fruits and vegetables. Freezing and frost-free air cooling technology rapidly freezes the rich taste and nutrients of fish food, opening a new era of food storage technology. In addition, freezing and cold storage have their own independent circulating cooling systems, so that the smells of freezing and cold storage are not mixed, and the freshness of ingredients is maintained with high efficiency. At the same time, it has an excellent dual-circulating cooling system, which breaks through the problem of food mixing easily caused by the single-circulating system of traditional refrigerators, so that the freezing room and the cold storage room can operate separately, and the independent cold flow circulation of the upper and lower spaces does not interfere with each other, forming the most ideal storage space and having an ideal storage space, so as to ensure that the food retains the most original and fresh flavor. Nutritionist Chen Yunfan mentioned that the key to preserving ingredients lies in the NG behavior of using the refrigerator when the temperature is < P >, so don't mistakenly think that the food won't go bad < P > Finally, nutritionist Chen Yunfan wants to remind everyone of some myths about the use of the refrigerator. Many people think that the ingredients will not go bad when they are put in the refrigerator, especially when they are frozen, which is a wrong idea, because the refrigerator can only slow down the speed of food corruption, but can't completely stop it; Secondly, it is suggested that the space for storing food in the refrigerator should not exceed 7 minutes at most, so as not to hinder the normal convection circulation of cold air in the refrigerator, which not only reduces the efficiency of the refrigerator, but also easily deteriorates the stored food due to insufficient coolness; It should also be noted that many cooks will stuff all the food after a large purchase into the freezer, causing the refrigerator to heat up because of a large amount of food at room temperature; It is suggested to pay attention to whether the refrigerator at home has the function of rapid freezing. As long as the function is started before going out for shopping, even if more normal temperature food is put in, the temperature of the refrigerator will not increase instantly and other foods will suffer.

To make delicious and healthy dishes, you need not only good cooking skills, but also fresh nutritious ingredients. After the selection of fresh ingredients and before cooking, properly store the ingredients in the high-tech fresh-keeping refrigerator and cook them as soon as possible, so as to keep the food nutritious and delicious and take care of the health of the whole family.