4. Tomatoes: After freezing, some or all fruits will be soft and rotten in water, showing brown round spots.
5. Bread: During the baking process, the linear segment of starch in flour has aged, which is the reason why bread has elastic and soft structure. With the extension of storage time, the linear part of amylopectin in bread slowly associates, which makes the soft bread gradually harden. This phenomenon is called "aging". The speed of "aging" is related to temperature. At low temperature (above freezing point), bread will age faster, but after being put in the refrigerator, the degree of hardening will come faster.
6, cucumber green pepper: cucumber, green pepper in the refrigerator for a long time, there will be frozen "injury"-black, soft, stale. Cucumbers also have sticky hairs. Because the temperature of refrigerator storage is generally around 4℃ to 6℃, the suitable storage temperature of cucumber is 10℃ to 12℃, and the suitable storage temperature of green pepper is 7℃ to 8℃. So it shouldn't last long.
7. Ham: If it is stored in the refrigerator, the water in it will easily freeze, which will promote the oxidation of fat in ham, and the quality of ham will be significantly reduced, greatly shortening the shelf life. ?
8. Chocolate: The indoor temperature is generally around 25℃ in summer. At this point, if Chock is taken out of the refrigerator, the chocolate surface will frost immediately. After a long time, chocolate will become moldy or worm-like due to humidity.
9, leafy vegetables: it is best not to store in the refrigerator, you should buy and eat.
How long can all kinds of food be kept in the refrigerator?
Fresh eggs: refrigerated for 30~60 days
Cooked eggs: refrigerated for 6-7 days.
Milk: Refrigerate for 5~6 days.
Yogurt: refrigerated for 7~ 10 days.
Fish: refrigerated 1~2 days, frozen 90~ 180 days.
Beef: refrigerated 1~2 days, frozen for 90 days.
Steak: refrigerated for 2~3 days and frozen for 270 days.
Sausage: refrigerated for 9 days and frozen for 60 days.
Chicken: refrigerated for 2~3 days and frozen for 360 days.
Canned: Refrigerate for 360 days without opening cans.
Peanut butter and sesame paste: opened and refrigerated for 90 days.
Coffee: opened and refrigerated 14 days.
Apple: refrigerated for 7~ 12 days.
Citrus: refrigerated for 7 days
Pear: refrigerated 1~2 days.
Cooked tomatoes: refrigerated 12 days.
Spinach: Refrigerate for 3~5 days.
Carrots and celery: refrigerated for 7~ 14 days.
Other foods are suitable for storage and freezing in the refrigerator.