Refrigerator is a "little weapon" for the preservation of daily food. It is common to use refrigerators to store ingredients, but recently foreign media reported that there are many common foods that are not suitable for storage in the refrigerator.
cucumber
Cucumbers in the refrigerator for a long time, there will be frozen "injury" - black, soft, and taste. Cucumbers also have long hair sticks. Because the temperature stored in the refrigerator is generally about 4-6 ° C, and the suitable storage temperature for cucumber is 10-12 ° C, and the green pepper is 7-8 ° C, so it is not suitable for a long time.
eggplant
Eggplant fresh-keeping does not need to be placed in the refrigerator, as long as it is placed in a fresh-keeping bag in a cool and ventilated place, but the surface layer of the eggplant must not be washed with water before storage to prevent the protective wax layer covered by the eggplant surface from being washed away, causing microbial damage. And prematurely rot.
tomato
The low-temperature freezing of the refrigerator will cause the tomato meat to become blister-like, becoming soft and rotten, and spalling. There will be dark spots on the surface, boiled and cooked, and severely rot. Not only that, but refrigeration will also delay the ripening speed of tomatoes, destroy the tomato skin film, affect its meat quality and taste.
Therefore, we'd better put the tomatoes in the basket or in the bowl. After buying them, the best pedicles (the parts of the tomatoes that are connected with branches or rhizomes with green leaves) are placed down to ensure that they are fresh and delicious.
Unripe banana
Bananas grow in tropical and subtropical regions and do not have the capacity to cope with cold environments. Suitable for storage at around 12 °C. If the green banana is placed in the refrigerator, its "maturation mechanism" will be harmed. Even if you get the room temperature and give me ripening, it is difficult to mature.
According to the Canadian Agricultural Marketing Association (CPMA), bananas are best kept at room temperature before maturity. The cold storage environment actually makes bananas mature more slowly, and the damp and dark environment in the refrigerator will only accelerate the decay of bananas. Therefore, there is no mature banana, do not put it in the refrigerator to save.
Mature bananas are different. The low temperature in the refrigerator can reduce the activity of amylase and pectinase, and slow down the banana to further maturation. In other words, refrigerated can keep the taste of ripe bananas longer.
Immature avocado
Immature avocados should not be placed in the refrigerator. Because cryopreservation delays the ripening speed of avocado.
If you don't want it to get too fast and want to keep it longer, it's best to put the avocado in a brown paper bag. If you want it to mature early, you can put it in the fruit bowl with the banana.
onion
The purchased onions should be placed in a low temperature, dry, dark and well ventilated area. Don't put the onions in plastic bags and refrigerators, so the onions that would have been resistant will soon rot.
When buying onions, buy the ones that are heavy in your hands, dry and firm, without scratches and smells (because the onions will smell when they are scratched or scratched). Store in a fresh, dry environment and avoid placing it with potatoes.
After the onion is refrigerated, it will not be cut. The onion is all open, and the sulfide inside will react, causing people to shed tears. The onions can be refrigerated in the refrigerator for 10-15 minutes before cutting. In addition, with a sharper knife, the chance of an onion squatting is smaller. In addition, the root must be cut at the end because the root has the highest sulphide content.
potato
Fan Zhihong, an associate professor in the Department of Nutrition and Food Safety at the College of Food Science, China Agricultural University, pointed out that storage studies have found that potatoes prefer a colder environment, and the higher the storage temperature, the higher the toxins produced. Foreign studies have found that if there is light, the toxin content will double at 24 °C at 7 °C; 4 times at 16 °C, and even 9 times at 24 °C. Therefore, if there is no vegetable, it is best not to buy more potatoes, and eat them in time.
In the hot summer and autumn season, potatoes must be placed in the refrigerator in time after they are bought. When the winter and spring days are cooler, don't put them in a heated room, preferably on a cold balcony. At the same time, it is best to wrap it in a black or opaque bag, and don't let it see the light, lest the potatoes are ready to germinate and increase the toxin content.
garlic
Garlic is stored in the refrigerator, easy to germinate, easy to soften, affecting the taste, and speeding up the decay. The correct way to save is to put the garlic in a plastic bag and seal the bag.
chocolate
After the chocolate placed in the refrigerator is taken out, the surface is prone to hoarfrost, which not only loses the original mellow taste, but also facilitates the reproduction of bacteria.
The optimum temperature for storing chocolate is 5 ° C - 18 ° C. When the room temperature is too high in summer, it can be sealed with a plastic bag and stored in a refrigerator freezer. When removing, do not open it immediately, let it slowly warm to room temperature before eating.
bread
During the baking process, the linear portion of the starch in the flour has aged, which is why the bread produces an elastic and soft structure.
As the standing time is extended, the linear portion of the amylopectin in the bread is slowly associated, and the soft bread is gradually hardened. This phenomenon is called "changing". The speed of "changing" is related to temperature. At low temperatures (above the freezing point), the aging is faster, and when the bread is placed in the refrigerator, the degree of hardening is faster.
coffee
Coffee is absorbent and easily absorbs the taste of other foods in the refrigerator. Low temperatures can also cause coffee to dehydrate, damaging its aroma and taste. It is recommended to store it indoors in a cool, dark place.
honey
Honey is inherently fresh-keeping and can be kept fresh for a long time in a sealed state. We don't need to put it in the refrigerator for preservation.
Conversely, if you put honey in the refrigerator, it will cause it to crystallize and precipitate glucose. This change does not affect the safety of honey, nor does it affect its nutritional value. It will only be difficult to extract and will affect the uniformity of the taste. Therefore, honey can be stored at room temperature.
Tea, milk powder
These foods can be stored at room temperature without cryopreservation. If they are placed in the refrigerator, if they are not tightly sealed, they will absorb the odor and moisture in the refrigerator, which will affect the flavor and be mildewed and deteriorated.
If tea and milk powder need to be stored for a long time, they must be sealed and then placed in the refrigerator for storage at a low temperature (can be stored frozen).
traditional Chinese medicine
It should not be placed in the refrigerator. The medicine is placed in the refrigerator and mixed with other foods for a long time. Not only can various bacteria easily invade the medicine, but also it is easy to get wet and destroy the medicinal properties of the medicine.
For some valuable medicinal materials, such as ginseng, velvet, gastrodia, codonopsis, etc., if you need to keep it for a long time, put it in a clean glass bottle, and then put a proper amount of simmer into the dark yellow glutinous rice. Seal the cap and leave it in a cool, ventilated place.