Having a refrigerator is really convenient in the hot summer, so some people use the refrigerator as a panacea and put everything in it, which results in harm to people. In fact, not everything is in the refrigerator. It can be put in. If you want to use the refrigerator safely, you need to know what can be put in and what cannot be put in?
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1
The refrigerator is divided into two parts. One part is refrigerated, and the inside is constant temperature. The temperature is about two to ten degrees. The other part is the freezer, and the temperature inside is below zero. The things that can be placed in these two parts are different and cannot be placed randomly.
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We all know that the function of refrigeration is to keep things fresh, but it cannot be stored Too long, that is, about three days. If it takes a long time, it will go bad. The frozen part can be kept for several months, but don’t keep it in there just because you think it won’t go bad. It will also break after a long time. Freezing things makes them no longer nutritious.
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What kind of things are suitable to be placed in the refrigerator? General fruits, vegetables and drinks can be placed in it, as well as the leftover food from each meal, rice, steamed buns, etc. However, it needs to be heated when eating the next day, otherwise there will be a lot of bacteria in it.
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4
The frozen space is suitable for placing fish, meat, popsicles, etc., but there are some things that should not be placed. For example, beer, carbonated drinks, steamed buns, medicinal materials, vegetables, fruits and chocolate that girls like to eat. Beer drinks can easily cause explosions, and other things are more likely to freeze.
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When using the refrigerator, wipe it frequently and use plastic wrap to keep things fresh, otherwise it will not only be easily contaminated Bacteria can also cause odor to occur. The frost in the freezer must be removed in time, otherwise the freezing effect will be affected.
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Especially for families with children and elderly people, pay more attention to the safety of placing things. For safety, take things out It is best not to let children take it out when the food is taken out, especially those who cannot even reach the refrigerator door. Do not eat the food immediately, otherwise it will damage the stomach and intestines.
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Tips for storing vegetables in the refrigerator. Green leafy vegetables are easy to wilt. To keep them fresh, putting them in the refrigerator is indeed a way. However, it is best to control the temperature of the refrigerator between 0-4 degrees Celsius and put a fresh-keeping bag outside, or put it in a fresh-keeping box for storage. Freshness preservation effect. Remember that it is best not to wash before storing, and do not leave it for too long, otherwise the vegetables will easily become rotten. Tuberous vegetables such as potatoes, cucumbers, and carrots are not so delicate and can be stored at room temperature without refrigeration. It should be noted that tomatoes are not suitable for storage in the refrigerator. Because after tomatoes are frozen at low temperatures, the meat will become blistered, the umami flavor will disappear, it will not be easy to cook, and in severe cases, it will become rancid and rotten.
Fruits that are not suitable for storage in the refrigerator. There are also many fruits that are not suitable for storage in the refrigerator, especially fruits such as mangoes, persimmons, and bananas. The so-called jam fruits are those fruits that can be peeled and have a jam-like pulp. Under low temperature conditions, the flavor of berry fruits will decrease and the skin will deteriorate. For example, we all know that bananas tend to turn black and rot when stored below 12°C, and fresh lychees will have their skin turn black and their flesh change flavor if left in an environment of 0°C for a day. For citrus fruits such as oranges, lemons, and tangerines, at low temperatures, the oil on the skin can easily seep into the pulp, making the pulp bitter. Therefore, it is not suitable to store citrus fruits in the refrigerator. It is best to store citrus fruits at about 15 degrees Celsius. Store at room temperature. Ready-to-eat fruits such as strawberries, bayberries, and mulberries are best bought and eaten immediately. Putting them in the refrigerator will not only affect the taste, but also easily become moldy. Apples and watermelons can be temporarily stored in the refrigerator to extend their shelf life.
The suitable storage temperature for cabbage, celery, onions, carrots, etc. is around 0℃.
The suitable storage temperature for cucumbers, eggplants, tomatoes, etc. is between 7.2℃ and 10℃.
Pumpkins should be stored above 10℃.
Tomatoes After being frozen at low temperature, the meat of tomatoes will appear blistered, soft and rotten, or may fall apart, with black spots on the surface, undercooking, no flavor, and in severe cases, they will rot.
If bananas are stored in a place below 12℃, they will turn black and rot.
If fresh lychees are left in an environment of 0℃ for a day, the skin will turn black and the pulp will change flavor.
After chocolate is refrigerated in the refrigerator, once it is taken out, a layer of white frost will form on the surface at room temperature, and it is easy to become moldy and deteriorate, losing its original flavor.
If ham is stored in the refrigerator at low temperature, the water in it will freeze, the fat will precipitate, the ham meat will become lumpy or loose, the meat will change flavor, and it will easily go rancid.
During the baking process of bread, the amylose part of the flour has aged, which is why the bread has an elastic and soft structure.
As the prevention progresses, the linear chains of the amylose part of the bread slowly associate, making the soft bread gradually harden. This phenomenon is called "staleness" in society. The rate of aging is related to temperature. Bread hardens faster in a low temperature room. Bread hardens faster in the refrigerator than at room temperature. Therefore, if it is stored for a short time, the bread should be placed at room temperature to prevent the bread from hardening.
Chinese medicines should not be stored in the refrigerator. If the medicinal materials are placed in the refrigerator and mixed with other foods for a long time, not only will various bacteria easily invade the medicinal materials, but they will also easily get damp, destroying the medicinal properties of the medicinal materials. Therefore, it is If some valuable medicinal materials, such as ginseng, velvet antler, gastrodia elata, Codonopsis pilosula, etc., need to be stored for a long time, they can be placed in a clean glass bottle, then add an appropriate amount of glutinous rice that is stir-fried over a slow fire until dark yellow, and then put in after it cools down. Seal the bottle cap tightly and store it in a cool and ventilated place.
Don’t put leftover mooncakes in the refrigerator. Mooncakes are baked pastries made with ingredients such as flour, oil, sugar and nuts. Baked goods should not be stored in the refrigerator. Although for some types of mooncakes, putting them in the refrigerator can extend their shelf life, but it will still affect their flavor. This is because the starch in the mooncake raw materials matures and becomes soft after baking. However, under low temperature conditions, the mature starch will precipitate moisture and become aged (that is, "regenerated"), causing the mooncakes to become soft. Hard and taste worse.
Mooncake varieties that contain less fat and less water, such as old Beijing's red and white mooncakes, will harden more obviously. Putting them in a low-temperature and humid environment in the refrigerator will not only cause It hardens quickly and is prone to mold. But for Cantonese-style mooncakes, they have high fat content and less flour, so the taste change will be relatively small.
Fish in the refrigerator should not be stored for too long. The refrigeration temperature of household refrigerators is generally -15°C, and the best refrigerator can only reach -20°C. Aquatic products, especially fish, are When the storage temperature does not reach below -30℃, the fish tissue will undergo dehydration or other changes. For example, if crucian carp is refrigerated for a long time, the fish body will easily become rancid, the meat quality will change, and it is inedible. Therefore, fish should not be stored in the refrigerator for too long.
Frozen foods should not be stored after thawing. Frozen foods bought from the market, such as meat, fish, chicken, duck, eggs, quick-frozen vegetables, etc., must be processed and eaten as soon as possible once defrosted and should not be stored. If the meat, fish, chicken, duck, etc. are stored for too long, the vitality of bacteria and enzymes will recover. Not only can they quickly multiply and decompose proteins, causing deterioration, but they can also produce toxic histamine substances, which can cause food poisoning if people eat them. ; If frozen vegetables are stored for too long, they will not only change color, lose nutrients, and degrade in quality, but they will also easily rot and become inedible. When frozen meat, fish, chicken, duck, etc. are frozen, their tissue cells are damaged due to the action of water crystallization. Once thawed, a large amount of protein will leak out from the destroyed tissue cells, which becomes nourishment for bacterial reproduction. . Experiments have shown that if fresh mackerel that has been frozen for 1 day is placed at 30°C for 6 hours, its spoilage rate is twice as fast as that of fresh fish; if thawed egg yolk is placed at 18°C ??for 2 hours, the number of bacteria will increase. About 2 times, after 8 hours, the number of bacteria increases by more than 50 times; if frozen fresh eggs are placed at a temperature of 0 to 15°C for more than 10 days, not only will the egg membrane become loose due to the long changes in cold and hot temperatures, , the egg white is thin, and the shell becomes sticky, yellow, even mildewed, smelly, and cannot be eaten; frozen vegetables, especially in hot weather, should not be stored, otherwise the green leafy vegetables will turn yellow quickly, and vitamin C will also be easily absorbed. destroy.