Precautions for storing food in refrigerator ppt, now many people will buy a lot of food at one time for convenience and store it in the refrigerator. Food is stored in the refrigerator, but there are actually many places to pay attention to. Let's take a look at the precautions for storing food in refrigerator ppt.

Precautions for food storage in refrigerator ppt 1 Tomato: After low-temperature freezing, the tomato meat is blistered, soft or cracked, with black spots on the surface, immature and tasteless, and in severe cases it is rancid and rotten;

Fresh litchi: When fresh litchi is placed in an environment of 0 degrees Celsius for one day, the skin will turn black and the pulp will turn sour;

Chocolate: once taken out in the refrigerator, chocolate will form a layer of frost on its surface at room temperature, which is easy to go moldy and deteriorate and lose its original flavor;

Ham: when ham is stored in the refrigerator at low temperature, water will freeze, fat will precipitate, leg meat will agglomerate or loosen, and meat will become stale and easy to rot;

Banana: Bananas will turn black and rot when stored below 12 degrees Celsius.

How to keep food in the refrigerator? How many days can food be kept in the refrigerator?

How many days can food be kept in the refrigerator? Refrigerator has become a container for storing food in our life. However, people mistakenly think that the refrigerator is a "food disinfection cabinet" at home and that the food stored in the refrigerator is hygienic. In fact, the refrigerator will breed a lot of bacteria because it stores food for a long time and is not cleaned often. In fact, although the food in the refrigerator looks fresh, it has actually gone bad. Cooked meat should not be stored in the refrigerator for more than 4 days.

The common cold storage temperature of food in the refrigerator is 4℃ to 8℃. In this environment, the growth rate of most bacteria will slow down. But some bacteria are psychrophilic, such as Yersinia, Listeria, etc., which can grow and reproduce rapidly at this temperature. If you eat food infected with this kind of bacteria, it will cause intestinal diseases.

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.

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.

Carrot and celery: after 7~ 14 days of cold storage, do not eat leftovers for 3 days, fruits and vegetables for up to one week, and sauces for two months. Many people think that once food is put in the refrigerator, it is equivalent to putting on "protective clothing". In fact, the nutrition and umami taste of food will slowly fade during storage. The latest issue of American Cooking Light magazine pointed out that there are tricks to keep food fresh.

Jackie nugent, a registered dietitian and spokesperson for the American Diabetes Association, said that there are three key points in storing food in the refrigerator: space, temperature and taking out food when it is in the best fresh state. Generally speaking, the refrigerator door frame has the highest temperature; The crisper rarely turns over and is close to the lower floor, so the temperature there is the lowest.

Refrigerator door frame: suitable for storing foods with strong antibacterial properties, such as unsealed pickles, jam, sesame paste, sour food, condiments, etc., most of which can be stored for 2 months. Because the refrigerator door is often opened, warm air will enter, so it is the least suitable place to store perishable food, such as unsealed hot meat, milk and so on.

Upper floor of cold storage room: suitable for storing hot meat, bacon, yogurt and hard cheese. Unsealed meat should be eaten before the shelf life. Once unsealed, hot meat can only be kept for 3~5 days; Bacon and hard cheese can be kept for three weeks.

Lower floor of the cold storage room: it can store food that needs to be heated quickly, such as leftovers, cooked eggs, fish and so on. In addition, leafless vegetables and fruits that are prone to frostbite are also best stored here. Cooked eggs can be kept for 7 days: leftovers should not exceed 3 days, leftovers should not stay overnight (leafy vegetables should be eaten at one time, not left), and they should be thrown away once they feel abnormal; Fresh fish can only be refrigerated in the refrigerator 1 day, and cooked fish can not exceed 3-4 days.

Fresh-keeping box: located at the bottom of the cold storage room, with the highest humidity, it is more suitable for storing vegetables, such as green leafy vegetables, peppers and broccoli. This kind of food can be stored for about 1 week at most.

It is particularly worth reminding that if the food has the following conditions, it means that it is not fresh, and it is best not to eat it.

Fruits and vegetables: Wet, soft and sticky fruits and vegetables should be thrown away immediately. Wilting vegetables are only dehydrated, but they can still be eaten. It is best to make soup. Leftovers change color and must be thrown away.

Meat: cooked meat such as unopened steak has expired for 4 days. Don't eat it. Frozen meat lasts longer, but it should not be frozen again after thawing. In addition, sticky or strange-smelling meat should be thrown away immediately.

Fish: If fish fills the refrigerator with strange smell, throw it away immediately.

Dairy products: milk is the easiest way to judge whether it has gone bad. If the milk turns sour, you'd better throw it away. In addition, milk caking or caking is also a sign of deterioration: it is difficult to judge whether butter and cheese have deteriorated, and its safety period is generally around 10 days after the shelf life. Yogurt can still be eaten after a few days of expiration, but its taste and nutritional value will be greatly reduced.

Cheese and butter have the longest shelf life, but for safety reasons, it is best to eat them within 4 weeks. No matter what kind of food is put in the refrigerator, it is best to seal it with containers or food bags and plastic wrap before putting it in the refrigerator, which is conducive to preservation and will not produce odor.

If the refrigerator smells, clean it thoroughly, then squeeze some toothpaste, wipe the refrigerator with a wet rag, and then wipe it with a clean rag. After drying, add some tea, fresh orange peel, grapefruit peel, coffee, activated carbon and so on. To get rid of the smell in the refrigerator.

Precautions for storing food in refrigerator ppt2 1. Pay attention to classified storage: meat, vegetables, condiments, etc. Need to be stored separately, fresh meat and frozen meat should also be stored separately. Traditional refrigerators have few temperature zones and simple partitions, but the requirements for food preservation temperature are different, and stacking and mixing are easy to bring annoying odor problems. Therefore, refrigerators with obvious food storage areas are very important.

You can refer to the beautiful refrigerator. Their Van Di Duo Duo door refrigerator has many partitions, and the partitions are obvious. It can store food in different categories, providing scientific storage temperature and space for different ingredients, which is not only conducive to the preservation of food, but also provides a lot of convenience for our daily access.

2. Pay attention to the shelf life: Many foods have their own shelf life, which is mainly determined by the best storage temperature of the food itself. Food that has passed the shelf life may look fresh on the surface, but it is actually inedible, so pay attention. The temperature of the freezer is about-18℃.

It can store fresh or frozen meat, fish, poultry and cooked food for about 3 months. The temperature of the refrigerating room is about 5℃, and all raw and cooked foods can be refrigerated, and the storage period is about one week. The ice temperature fresh-keeping room located in the upper part of the cold storage room can keep fresh meat, fish, shellfish, dairy products and other foods for about three days at a temperature of about 0℃.

Take Midea's refrigerator as an example, its cold storage room and variable temperature room can be independently adjusted and closed, and the rooms can be freely combined according to food types, quantities, seasons, lifestyles and other needs. And can set the best energy-saving and fresh-keeping mode, which is more conducive to food storage.

3. Pay attention to the separation of raw and cooked food: raw food is often contaminated with germs, parasitic eggs and other dirt. If raw food and cooked food are put together, the bacteria on raw food will soon pollute cooked food, which is not conducive to human health. So raw and cooked food should be stored separately.

Be careful not to put hot food in the refrigerator: putting hot food in the refrigerator will increase the temperature of the refrigerator, increase the burden of the refrigerator and increase energy consumption.

5, be careful not to put it too full: don't put it too tightly in the refrigerated food, leaving a gap will be conducive to the circulation of cold air, make the food cool faster, reduce the number of compressor operations, and save electricity.

6. Pay attention to the handling of meat before putting it in the refrigerator: first clean the meat food (frozen meat can be directly refrigerated, aiming at ordinary meat), cut it and put it in a fresh-keeping bag or box, preferably a fresh-keeping box, and store it according to daily consumption needs. Take as much as you eat to avoid secondary thawing and produce more bacteria.

7. Be careful not to put bottled drinks in the freezer: bottled drinks may burst after being put in the refrigerator freezer, causing an explosion, so be careful.

8. Be careful not to put chemicals and food together in the refrigerator: the food in the refrigerator is for eating. If chemicals are added, food will be easily polluted, which will affect human health. Many people also like to store cosmetics in the refrigerator, which is not good, because cosmetics contain a variety of chemicals, which is not good for human health.

Precautions for food preservation in refrigerator ppt3 drugs

Anyone who drinks Chinese medicine at home and uses Chinese medicine for health and diet should pay attention. The medicinal materials are very good, but it is best not to store them in the refrigerator. Storing the medicine in the refrigerator will not only affect the efficacy of the medicine, but also cause the medicine to be contaminated by bacteria in the refrigerator, which is harmful to the health!

Naked leftovers

Of course, it is also possible to put leftovers in the freezer of the refrigerator, but it is necessary to avoid the situation that leftovers are naked in the freezer without a cover. The food placed in this way is easy to cross-talk between foods, and it will also increase the risk of cross-infection of bacteria in the refrigerator.

Leftovers should be put in a sealed fresh-keeping box, or covered with plastic wrap and put in the refrigerator. Not only is it not easy to go bad, but it can also ensure that you will not eat bad stomach to a great extent.

All leafy vegetables

All leafy vegetables, including cabbage, water spinach, lettuce, cabbage, onion, etc. In fact, it is not suitable for storage in the refrigerator. After leafy vegetables are put into the refrigerator, they are easy to get frostbite, but their taste is not very good. Chinese chives, in particular, are frozen in the refrigerator for one night, and the wrapped jiaozi is not delicious.

Moreover, after leafy vegetables are frozen, they will soon produce an unpleasant smell in the refrigerator, affecting all the food in the refrigerator.

After buying leafy vegetables, you'd better cook and eat them now, and don't leave them for too long, otherwise the taste will be particularly affected.

If leafy vegetables must be stored, the best storage temperature is about 0 to 4 degrees. At this time, it is a good choice to put them in a ventilated and dry place in the kitchen without heating. If the temperature in the kitchen is too high, you can tie a plastic bag and put it outside the window. Vegetables will not go bad and taste good.

Most fenshui fruits

All tropical fruits, including bananas, litchi, papaya and other fruits, as well as tomatoes, cucumbers and other vegetables, are not suitable for long-term storage in the refrigerator.

Bananas are easy to deteriorate, turn black and rot in the refrigerator, which is shorter than the shelf life of bananas that can be preserved at room temperature. Tomatoes freeze easily in cold storage and become as soft as soaking water.

Apples, peaches, oranges, kiwis and other fruits don't need to be put in the refrigerator. Sealed, non-perishable healthy fruits can be stored for about 15-30 days even if they are not stored in the refrigerator, but they will be contaminated by bacteria and may be more likely to deteriorate.

There is only one case where fruit needs to be put in the refrigerator.

For the purpose of keeping fresh and avoiding deterioration, the cut but not eaten fruits can be stored in the refrigerator, but the following steps must be completed:

First of all, put plastic wrap and plastic bags to prevent fruits from being exposed and corroded by bacteria in the refrigerator;

And the preservation time must be short, and you should eat it as soon as possible, otherwise you will definitely have diarrhea.

Put it in the refrigerator and get twice the result with half the effort.

preservative film

Sticking a layer of cling film on the inner wall and interlayer of refrigerator will greatly reduce the frosting speed of the inner wall of refrigerator and make the refrigerator easier to clean. Just take off the plastic wrap without wiping or washing, and the stains on the inner wall of the refrigerator will fall off, which is especially easy to use!

Healthy paper

Frost in the refrigerator is mostly due to too much water in the refrigerator. Putting a roll of toilet paper in the refrigerator can absorb excess water in the refrigerator, thus avoiding frosting. Toilet paper can also absorb the odor in the refrigerator and prevent food from stinking.

Cheats of ice box storage

Deception 1: pay attention to food placement!

Should not be too full, leaving space around the refrigerator;

Separate raw from cooked to avoid cross infection of bacteria!

Should not be too full, leaving space around the refrigerator;

Separate raw from cooked to avoid cross infection of bacteria!

● Refrigerator door

The inside of the refrigerator door is the highest temperature in the refrigerator, because the door will be opened and closed frequently, resulting in great temperature changes.

Suitable for canned food such as beverage, fruit juice, wine, seasoning and jam.

Not suitable: yogurt, boxed milk, eggs.

● Refrigeration room

From top to bottom, the temperature of the refrigerator changes from high to low, so there is corresponding pressure when placing food. Similar foods should be put together as far as possible, which is not only convenient to take, but also can avoid bacterial pollution caused by cross-contact.

Top floor: eggs, dairy products (yogurt, cheese, etc. ), the leftovers are stored in a fresh-keeping box.

Middle layer: cooked meat, cooked food and milk.

Below: raw meat, raw fish, seafood.

Drawer/fresh-keeping room: You can put some vegetables and fruits, because their freshness needs a lot of humidity. But vegetables and fruits should be separated, with vegetables in one drawer and fruits in the other. Don't mix them together.

● Freezing room

Upper layer: jiaozi, wonton and other quick-frozen foods. Freeze-hardening and placing in the middle layer.

Middle layer: steamed bread, bread, steamed buns, ice cream, cooked food, etc.

Lower floor: raw meat, raw fish and seafood that need to be stored for many days. Remember to separate raw food from cooked food to avoid cross-contamination.

Cheats 2. Safe time for food storage

● Eggs: The refrigerated storage time is 30 days. Cooked eggs are refrigerated for 6-7 days.

● Fruit: within one week.

● Vegetables: green leafy vegetables 1-2 days, and radishes and celery can be preserved for about 5 days.

● Fresh: refrigerated for 24-48 hours and frozen for 90 days.

● Packaged food: it can be said that it will be refrigerated for several degrees, eaten within a few days, and stored according to the tips on the outer packaging.

Whether the food is fresh or frozen, eating nutrition as soon as possible will save more.

Trick 3: Never freeze repeatedly.

Food freezing will not kill bacteria, and the temperature will increase when it is thawed. With the change of humidity, bacteria on the surface can easily multiply. Repeated freezing of food will destroy food cells, and such an environment is more conducive to bacterial reproduction. Nutrition is easy to lose.

It is recommended to store food in a separate package before freezing. In the best case, eat and buy now, and don't freeze it repeatedly. This not only affects the taste, but also easily leads to bacterial contamination and food safety problems.

Tip: How to get rid of refrigerator odor?

● Deodorization with vinegar

Put half a bowl of vinegar in the corner of the refrigerator and change it once every half month.

Deodorization with low sodium bicarbonate

Put a third of baking soda in the bowl in the corner of the refrigerator and change it once a month.

● Deodorization of coffee beans

Coffee beans or leftover coffee grounds can be wrapped in gauze and put in the refrigerator once a month, which can effectively remove the odor in the refrigerator.

● Tea deodorizing

Wrap the tea in gauze and put it in the refrigerator. A bag of tea is preferably not less than 50 grams, which can remove the odor and can also use scented tea. After half a month, take the tea out to dry, and you can use it repeatedly!