The temperature in the freezer of the refrigerator is generally around-18℃. At this temperature, bacteria are generally inhibited or killed, so the food stored in it has better fresh-keeping effect. But freezing does not mean that it can be completely sterilized, and some bacteria with strong freezing resistance will survive. Therefore, from another perspective, if the refrigerator is not disinfected frequently, it will become a "hotbed" for some bacteria.
In addition, don't store too much food in the refrigerator, which will make the external temperature of food low and the internal temperature high, leading to deterioration.
Some housewives use the refrigerator as a fresh-keeping box to store food for a long time. How to use the refrigerator correctly is also an indispensable family knowledge for housewives. For the health of your family, you must know how long the food in the refrigerator can be kept.
1, milk must be protected from light.
Light can not only sterilize, but also "kill" the nutrients in milk. It was found that milk would be acidified and deteriorated after direct exposure for 4 minutes. Vitamin B2 in milk is very sensitive to light, and will be quickly lost under light. Light will also oxidize the lipids in milk, leading to the gradual destruction of other nutrients such as vitamins A, D, B6 and B 12. Among them, milk in glass cans or plastic cans is the most fragile. Even under the light of the supermarket freezer, the "best shelf life" of milk is only about 4 hours.
Green tea should be stored in the refrigerator.
Green tea has many health benefits, which have been proved to help prevent heart disease, cancer, Alzheimer's disease and so on, mainly because it contains catechins. However, a study published in the American Journal of Food Science pointed out that the catechin content of green tea would decrease after being left at room temperature for six months. So it's best to keep green tea in the refrigerator. Black tea can be stored at room temperature.
3. Fruits and vegetables are easy to deteriorate and "infect"
Vegetables and fruits are easy to deteriorate and "infect" when put together. The old Chinese medicine health network reminds that not only people will get infectious diseases, but also the deterioration between fruits and vegetables will be "contagious". The research of Pennsylvania State University reminds us that when apples, almonds, red peppers, peaches, cantaloupes and tomatoes are put together with other fruits and vegetables, ethylene gas will be released, which will make the latter mature and deteriorate rapidly. In addition, putting the above fruits and vegetables together with cruciferous vegetables and green leafy vegetables will also make the leaves of the latter turn yellow and rot quickly.
It is best to put delicate green leafy vegetables in the refrigerator and eat them as soon as possible. Radish, carrot, cabbage, potato, onion, apple, pear, etc. Are all storable food, suitable for balcony. Root vegetables such as potatoes, the smaller the vitamin C content, the higher it can be stored in paper bags to prevent excessive light and oxygen from destroying vitamin C.
Many users hope to find an effective way to remove the odor in the refrigerator. In fact, activated carbon can remove odor. It is best to prepare two copies of activated carbon for standby, change it once a week or two, and then take it to a dry and sunny place for exposure to ensure the best adsorption effect. It should be noted that the capacity of activated carbon, like batteries, will decrease slightly every time it is "charged and discharged", so remember to replace it in time.