Frozen food to thaw shall be within 24 hours after eating
In daily life, many people will be all kinds of food stored in the refrigerator, so all kinds of food in the refrigerator can put how long? The reporter interviewed quanzhou freezing industry association secretary general zhang is, he has been in freezing industry for decades.
The quanzhou area currently has more than 70 large freezer, proposed in storing the frozen meat, chicken wings, chicken feet, frozen fish, fruit and other kinds of food. Citizens if buying from the market is frozen pork, mutton, beef, frozen fish and seafood, once thawed, must eat within 24 hours, because the frozen meat in thawing process, such as hidden in the microbes, bacteria, fertility will greatly enhance the enzyme activity increase, the frozen again is easy to deteriorate, not easy to store. If not fully thawed frozen meat, put it in the refrigerator freezer, \"secondary\" frozen will reduce water retention capacity, the nutritional value of meat and taste will also be comprehensive.
\"On the market of apples, pears and other fruits from origin cold storage transportation come over, the fruit also belong to r.f, normal to buy back home, had better not put in the refrigerator, can be stored at room temperature, if repeated freezing, the water retention of the pulp decreases, the skin appears wrinkled skin.\" He introduced.
Household refrigerator frozen foods Had better not exceed 3 months
Household refrigerator used to keep food cold storage temperature of 4 ℃ 8 ℃, in this environment, the vast majority of bacteria growth speed will slow down. And freezers, freezer temperature generally around - 18 ℃, the temperature, the biological reaction decreased, while not totally suppressed, but more to prolong shelf life.
Standing director of refrigeration institute, jimei university in fujian province mechanical and energy engineering college professor jian-yi zhang remind, citizens need to pay attention to, the meat in - 18 ℃ storage period for 6 to 12 months, fish in - 18 ℃ storage period for four to eight months. But this is all based on temperature stays the same all the year round or under the condition of small temperature fluctuations. Considering the household refrigerator need often switch, temperature fluctuation is bigger, frozen food in general - 18 ℃ refrigerator can store for 3 months. As long as normal freezer, frozen storage time not more than three months, the quality of the food is guaranteed.
\"As you buy, fresh food had better eat, lest affect the food is delicious.\" The people's liberation army 180 hospital health management center, said senior nutritionists Lin Xiaomei even in low temperature under the condition of the freezer, some microbes can also survive and reproduce, just slow down. The be fond of of bacteria to temperature is different, some bacteria belong to the psychrophilic bacteria, 40 ℃ below zero can move, only the lower the temperature, the less activity is frequent, common cause have loose bowels of psychrophilic bacteria is the dysentery bacillus. Refrigerator if not disinfection, often be some bacteria \"hotbed\" instead.
Second affiliated hospital of fujian medical university nutritionist Yang Dong cloud said, although the refrigerated food will lead to loss of nutrition even bad, but as long as do the following, can reduce the adverse impact of the cold storage for food: first must ensure that food is in front of the quick-frozen fresh; Secondly instant cooling should be taken when refrigerated, best reaches a certain temperature in half an hour; Third, thawing can't take high temperature thawing, should let its natural thaw under normal temperature, or rinse with cool water, otherwise it will change the taste of food, loss of nutrition; Fourth, refrigerated quick-frozen food cannot be repeated thawing, otherwise food spoils easily; Finally, the cold storage time is too long, because of low temperature, also can reduce biological response is slow, but not completely suppressed, or there will be a bacteria activity.
Although household refrigerator can keep fresh food, but also has exquisite storage method. How to store food can keep fresh and safety?
Pigs, cattle, sheep and other large pieces of meat should be stored separately. Best is divided into small package, so eat when take very convenient, and prevent the large pieces of food repeatedly thaw and affect their nutritional value and taste.
With plastic wrap or plastic bag. Fresh fish, meat and other food have to deal with it in the fridge. Want to use plastic bag packaging, in the storage compartment. Vegetables and fruits to dry, the surface water into plastic bag, with above freezing temperature storage advisable.
Hot food should never be placed in operation in the refrigerator. Food is not cooked mix together, in order to keep health. According to the requirements of food storage time, temperature, reasonable use a space in the oven, don't put the food directly on the surface of the evaporator, want a jar, in order to avoid freezing on the evaporator, the inconvenience.
Storing food shoulds not be too full, too close, want to leave gaps. This is advantageous to the cold air convection, lighten the load, prolong service life, saves the electricity.
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