Why should food be in the fridge 20

Keeping food in the refrigerator can delay the reproduction and growth of bacteria, thus prolonging the preservation time of the food, so that the food will not spoil too quickly Because the spoilage of food is a direct consequence of the proliferation of bacteria in the food.

Food that is not put in the refrigerator is particularly prone to spoilage due to high outside temperature, rapid bacterial multiplication, and food. Eating spoiled food can cause a large number of bacteria and their toxins to enter the body, which can easily cause gastrointestinal diseases.

Under the right conditions, a single bacterium can produce 16 million bacteria after 8 hours of continuous reproduction. The suitable reproduction temperature of most bacteria is about 37 °C, below 10 °C, and most bacteria reproduce slowly. Therefore, food stored in the refrigerator can delay the growth of bacteria

However, it is worth noting that some pathogenic bacteria, such as listeria and Yersinia can multiply slowly at about 4 °C, so the refrigerator is not a safe, and the food should not be stored in the refrigerator for too long, and must be reheated before eating.

Salting, candied and dried are all effective ways to control the growth of bacteria and improve the flavor of food. Marinated foods should be cooled as soon as possible after they are out of the pan to avoid the proliferation of bacteria remaining in them.

The lower the temperature, the lower the energy activity, and the lower the energy activity, the longer the food lasts!

For example, an apple can be stored for 3 days at 35°, then it can be stored for 1 week at 7°C, and if it is minus 273 to 15 degrees Celsius, it can theoretically be kept fresh forever!

The change in temperature is easy to spoil food, so the refrigerator appears in this world, and it can best achieve the purpose of preserving the freshness of food.

In order to keep it fresh and store for a long time.

Why are you asking this? You don't want to put it in the refrigerator and put it in your stomach.

The 10 most inappropriate foods to store in the refrigerator.

What foods can't be kept in the fridge? Many people like to buy a lot of food at once and throw it in the refrigerator for storage. This is not the right way to do this, some foods are easy to spoil faster when thrown into the refrigerator, and they can also spoil other foods.

1. Starchy foods.

Starchy foods such as steamed buns, flower rolls, and bread cannot be put in the refrigerator, which will speed up the speed of drying and hardening, and if you can't eat them for a short time, you can seal them and put them in the freezer to freeze.

In addition, bread and biscuits should not be stored together, so that the moisture in the bread will be transferred to the biscuits, making the biscuits soft and the bread hard, which is not good for both.

2. Chocolate.

After the chocolate is taken out in the refrigerator, the surface is prone to white frost, which not only loses its original mellow taste, but also facilitates the reproduction of bacteria. Rui Lily says that the best temperature for storing chocolate is 5 to 18 . Good auspicious.

It can be sealed in a plastic bag and then stored in the refrigerator. When taking it out, do not open it immediately and allow it to slowly warm to room temperature before serving.

3. Fish. The fish in the refrigerator should not be stored for too long, the refrigeration temperature of the household refrigerator is generally -15, and the best refrigerator can only reach -20, and aquatic products, especially fish, when the storage temperature does not reach -30 below, the fish body tissue will be dehydrated or other changes, such as crucian carp refrigerated for a long time, it is easy to appear rancidity of the fish body, the meat quality changes, inedible.

4. Medicinal materials. Medicinal materials should not be placed in the refrigerator, and if the medicinal materials are mixed with other foods for a long time, not only will various bacteria easily invade the medicinal materials, but also be easily damp, which will destroy the medicinal properties of the medicinal materials.

Therefore, for some valuable medicinal materials, such as ginseng, deer antler, gastrodia, codonopsis, etc., if they need to be stored for a long time, they can be placed in a clean glass bottle, and then put in an appropriate amount of glutinous rice that is fried with a simmer until it is dark yellow, and put it in after cooling, seal the bottle cap tightly, and put it in a cool and ventilated place.

5. Tomatoes.

After the tomatoes are frozen at low temperature, the flesh is blister-like, soft and rotten, or there are spalling phenomena, there are black spots on the surface, undercooked, no umami, and in serious cases, it is rotten.

6. Cucumber and green pepper.

Cucumbers and green peppers will turn black, soft, and taste when stored in the refrigerator for a long time. Cucumbers also grow sticky hair. Because the storage temperature in the refrigerator is generally about 4 to 6, while the suitable storage temperature for cucumbers is 10 to 12, and green peppers are 7 to 8, so it should not be stored for a long time.

7. Green leafy vegetables.

Leafy greens not only spoil the leaves faster when they are kept in the refrigerator, but they may also produce toxic nitrites due to enzymes and bacteria.

8. Bananas. If the banana is stored in a place below 12, it will make the banana black and rotten.

9. Fresh lychee.

If the lychee is left in an environment of 0 for one day, the skin will turn black and the flesh will become flavorful.

10. Strawberries.

When strawberries are stored in the refrigerator, not only will the flesh be foamy and the taste will be greatly reduced, but they will also be susceptible to mildew.

The following foods should not be stored in the refrigerator:

1) Bananas: Stored in an environment below 12 will make them black and rotten.

3) Cucumber: If you leave it in the refrigerator for three days, the skin will become water-soaked and lose the flavor it holds.

4) Tomatoes: After freezing, some or all of the fruits will be soaked in water and soft and rot, showing brown round spots.

It is better not to put bread in the refrigerator: the starch straight chain part of the flour has aged during the baking process, which is why the bread develops an elastic and soft structure. As the bread is left for a longer period of time, the amylopectin in the bread slowly associates, and the soft bread gradually hardens, a phenomenon called "aging".

The rate at which "aging" is temperature dependent. It ages faster at low temperatures (above the freezing point), while bread hardens faster when it is stored in the refrigerator.

Cucumbers and green peppers should not be stored in the refrigerator for a long time: If green peppers are stored in the refrigerator for a long time, they will have frostbite "injury" - blackening, softness, and taste. Cucumbers also grow sticky hair.

Because the temperature stored in the refrigerator is generally about 4 to 6, while the suitable storage temperature for cucumbers is 10 to 12, and green peppers are 7 to 8. Therefore, it is not suitable to exist for a long time.

Another place to be clear is that the principle of storing food in the refrigerator is to slow down the growth and reproduction of microorganisms, and cannot kill microorganisms. The most suitable reproduction temperature for most microorganisms is around 37 degrees Celsius, and some can multiply rapidly above 20 degrees Celsius, although the vast majority of microorganisms grow slowly below 10 degrees Celsius, but there are still some bacteria that can survive or even multiply at lower temperatures.

Therefore, inappropriate storage temperature, high food temperature, raw and cooked cross-storage, etc., all affect the refrigeration effect and reduce the "insurance coefficient" of the refrigerator.

Because some foods can be put in the refrigerator, which will affect the nutritional value and taste of the food, some foods cannot be put in the refrigerator.

Bananas, lychees, cucumbers, bread, tomatoes, green leafy vegetables and traditional Chinese medicine, etc., are not suitable for storage in the refrigerator and are easy to accelerate their deterioration.

When buying vegetables and cooking, you should also abide by the principle of moderation, do not cook too much at one time, otherwise you need to put it in the refrigerator, which will affect the taste on the one hand, and may also lead to the breeding of bacteria.