What are the food storage conditions
Generally speaking, we want to store food in the refrigerator in our daily life, but many people put food directly in the refrigerator, which is easy to lead to food deterioration without classification. What are some food storage conditions? What are the storage conditions of food? 1
The deterioration factors of food are often very complicated, and improper storage is one of the important factors leading to food spoilage. The function of food storage is not only to store food, but also to prevent it from spoilage and ensure food quality. There are two main ways to store food, namely, low temperature storage and normal temperature storage.
※ Low temperature storage is mainly suitable for the storage of perishable food (such as animal food). According to the different temperatures of low-temperature storage, low-temperature storage can be divided into refrigerated storage and frozen storage. Cold storage refers to the storage of food (such as vegetables, fruits, cooked food, dairy products, etc.) in a refrigerator or low-temperature cold storage at a temperature of 1 ~ 11℃; Frozen storage refers to the storage of food (such as aquatic products, livestock and poultry products, quick-frozen food, etc.) in a freezer or a low-temperature freezer at a temperature of-29 ~ 1℃.
※ Storage at room temperature Storage at room temperature is mainly suitable for non-perishable foods such as grain, edible oil, condiments, candy and bottled drinks. The basic requirements of normal temperature storage are: the storage place is clean and hygienic; Store in a cool, dry place to avoid high temperature and humidity; There are no pests such as cockroaches and rats in the storage place.
when purchasing food in shaped package, you should pay attention to the storage method and shelf life of the product identified in the product label (or product manual) on the outer packaging of the product, and store it according to the storage method identified in the product label (or manual). Bulk food and various edible agricultural products should be stored according to the characteristics of various foods.
How to store food
1 is the storage of fresh food. Many people tend to overlook
Let's talk about vegetables first. Fan Zhihong, director of China Nutrition Society and associate professor of Food College of China Agricultural University, said that the suitable storage temperature of vegetables is generally 1℃-11℃. For example, warm vegetables such as cucumber, bitter gourd, cowpea and pumpkin should be stored at around 11℃ and not lower than 8℃. Most leafy vegetables are cool-loving vegetables, and their suitable temperature is 1℃-2℃, not lower than 1℃. However, it should be noted that green leafy vegetables must be wrapped and put in the refrigerator, not close to the inner wall of the refrigerator to avoid frostbite, and it is best not to store them for more than three days. Beans, eggplant, tomatoes and green peppers can be stored at low temperature for 4-5 days. Potatoes, carrots, onions, white radishes, cabbages and the like can be put longer. Of course, it is best to put them in the refrigerator. If it is inconvenient, they can also be placed in a cool and ventilated place at home.
2. It's fruit
Most fruits need to be put in the freezer. If it is kept at room temperature, strawberries and grapes can be kept for a day or two, and apples and oranges can be kept for more than a week. Some tropical fruits, such as bananas and mangoes, don't need to be put in the refrigerator.
3. Fish and raw meat should be packaged in advance into a quantity that can be eaten at one time, and put in the freezer
Seafood and livestock and poultry meat should be isolated as much as possible, and should not be scattered.
4. Raw staple foods such as rice, flour and beans can be stored in a dry place at room temperature.
It is best to ventilate rice regularly to dissipate heat. Flour and beans should be sealed.
5. Cooked cooked food has different storage conditions according to different kinds of food.
Staple foods such as rice, steamed bread and bread can be stored in the freezer if they are only stored for a short time. If the storage time is more than three days, or if you want to keep the soft taste of the staple food, it is best to put it in the freezer.
6, cooked meat, there are three kinds of differences
(1) floss, dried meat and preserved meat, as well as ham sausage, canned food, etc., can be stored at room temperature, and eaten as soon as possible after opening, and it is best to put the unfinished meat in the refrigerator.
(2) Sauced and marinated meat products, such as sauced meat and braised pig's trotters, need to be refrigerated in the whole process, and the refrigeration temperature is below 4℃. If you want to keep it for a long time, you can also freeze it, but the taste will decrease after thawing.
(3) Home-cooked dishes with meat, such as shredded pork and stewed meat, need to be kept in the cold room of the refrigerator at a temperature below 4℃.
7. Try not to leave the vegetables for the next meal
If you can't eat them all at once and don't want to throw them away, you should leave some of them when you take them out of the pot and put them directly in the refrigerator for 1 days.
8. Soups and soups are the most troublesome to keep, and many people often stew a large pot of soup
When drinking soup, they should eat as much as possible, so that the soup that has not been eaten is easier to keep. If the remaining soup is eaten the next day, it can be covered and stored in the refrigerator and stored below 4℃. If you want to eat it after two days, you should put it in a sealed box and put it in the freezer.
Finally, I would like to remind you that it is best to measure the temperature of refrigerators that have been used for a long time frequently to ensure that the refrigerating room is around 4℃ and the freezing room is around MINUS 18℃. What are the storage conditions of food? 2
How to keep food correctly
In the hot summer, we should not only know how to eat food, but also clearly understand the methods of food preservation, so as to ensure food safety and keep the nutrition of food as much as possible. Because improper storage will lead to the growth of bacteria, which will lead to the loss of food nutrition. Let's follow me to find out.
methods for preserving four kinds of food
methods for preserving food: green vegetables
Usually, after you buy green leafy vegetables home, you should air dry the water on the surface first, and then put them in food bags and put them in the refrigerator. It should be noted that the bag should not be completely sealed. Before storage, several air holes can be punched in the bag to ensure the good air permeability of green leafy vegetables.
Leftovers of food preservation methods
After the leftovers are aired, wrap them in a clean container (fresh-keeping box or fresh-keeping bag) and put them in the refrigerator. When you take them out to eat next time, you should fully heat them. Fruits that can't be eaten should be covered with clean plastic wrap and put in the refrigerator, and the surface layer should be cut off before.
Eggs as food preservation methods
Generally, there are two kinds of eggs in the market, namely, bulk eggs and boxed eggs. Before leaving the factory, most of the boxed eggs have been cleaned, disinfected, coated and other processes, which can well ensure the quality of eggs, and there is no need to clean them again. Bulk eggs are generally not cleaned. Before being preserved, the surface dust should be gently wiped off with a clean cloth, and then placed in a separate box in the refrigerator to avoid cross infection.
the method of food preservation meat
neither pig, beef, mutton nor poultry and aquatic products have the same protection mechanism as vegetables, and it is easy to cause bacterial growth whether raw or cooked. In particular, fresh meat contains more bacteria, so it is more conducive to preservation after heating.
The above is the specific food preservation method I introduced to you. Do you understand? Different foods should be preserved in different ways. In addition, we should remind everyone that it is best to measure the temperature after the refrigerator has been used for a long time. Generally, the refrigerating room should be kept at around 4℃ and the freezing room should be kept at around MINUS 18℃.
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The ways to preserve food are
Bread preservation: put a fresh celery in a plastic bag filled with bread to keep the bread fresh.
Storage of milk:
(1) Fresh milk should be placed in a cool place immediately, preferably in the refrigerator.
(2) Don't expose milk to sunlight or light. Both sunlight and light will destroy several vitamins in milk, and at the same time, it will lose its fragrance.
(3) The milk should be put in the refrigerator, and the bottle cap should be covered to prevent other odors from entering the milk.
Cooling cooked food:
Cooking food according to the standard cooking method, then placing it in an airflow cooler to reduce the temperature of the food to 3 degrees, and storing it in a refrigerator at this temperature. When the cooked food is taken out of the cold storage, it only needs to exchange heat (without cooking) for 1.2-21 minutes with a specially designed dish-loading furnace, so that the temperature can meet the use requirements.
Frozen food is prepared food, which can save processing time and labor. It is easy to control components and calculate costs. Food is not affected by seasons, which saves storage space, and increasing the inventory quantity can ensure the inventory quality. Fruits and vegetables are deeply frozen for several months, with little loss of vitamin C.