Is it true that watermelons increase in bacteria after being put in the refrigerator and used plasti

Sealing plastic wrap affects watermelon storageAccording to the insufficiency, when we store food in the refrigerator daily, we rely on the cold air in the refrigerator to contact the ingredients, so that the temperature of the ingredients gradually decreases to inhibit the reproduction of bacteria. However, plastic wrap is a very thin layer, which does not have an obvious effect on hindering heat conduction, and its function is mainly to prevent cross-contamination of ingredients in the refrigerator. Therefore, we still advocate that when the food is placed in the refrigerator, it is best to put it in a crisper box, or there is a layer of plastic wrap on the surface, rather than putting it directly in the open mouth, otherwise it will be easier to carry over the flavor and cross-contamination.

Taking a step back, if we say that our watermelons are covered with a thin layer of plastic wrap, which will affect the preservation effect, is it that our fresh-keeping box cannot be used at all, because the effect of the fresh-keeping box to hinder the transmission of cold air is stronger than that of plastic wrap, but everyone will obviously think it is ridiculous to say this. Therefore, the argument that adding a layer of plastic wrap will hinder the refrigeration of watermelon is not well-founded. How to keep food fresh in summer Refrigeration in time is the key, in fact, the most important thing in food preservation is not to seal the plastic wrap or put it in the crisper box, but to refrigerate it in time.

When the food is just cooked or the fruit is just cut, the number of bacteria carried in the food is very small, and it is best to seal it and store it in the refrigerator at this time. When the food is in contact with the outside air for a period of time, the bacteria have gone through the initial reproduction, at this time put the food in the refrigerator, although it can delay the reproduction of bacteria, but the effect is far less than the effect of putting it directly into the refrigerator, and the freshness time will be reduced accordingly. Therefore, timely refrigeration of food is the top priority.

As for whether to use plastic wrap, start with bacteria. On the watermelon, note that it is not the cross-section of the watermelon, but the whole watermelon, and the bacteria are mainly external pollution and internal bacterial reproduction. When the watermelon is put in the refrigerator, the presence of plastic wrap does cool down a little slowly, but it is not particularly noticeable.

Except for a small amount of water on the surface that may evaporate, the water inside the entire watermelon is almost constant, so the bacterial reproduction inside the watermelon will not change significantly. In addition, the external pollution, cover the plastic wrap, the biggest pollution is brought by the plastic wrap, but the plastic wrap does not have the necessary conditions for bacterial growth, and the amount of bacteria is very low without deliberate pollution. However, without covering the plastic wrap, the quality of other foods in the refrigerator can be guaranteed, which is likely to lead to cross-contamination, and the apples next to the bad apples are more likely to spoil.

In addition, ethylene from ripe fruits is more likely to ripen watermelons without plastic wrap. Therefore, if you don't use plastic wrap, it is likely that the bacterial content is higher and it is more likely to spoil. <>

If the texture and internal condition of the watermelon itself are the same, if the process of cutting the watermelon does not introduce external bacterial sources, then before putting it in the refrigerator (sealing plastic wrap and not sealing plastic wrap) the two conditions (moisture, oxygen content, bacterial community) should be basically the same; The cling film is generally considered to be breathable, so the internal condition of the watermelon refrigerated after sealing the plastic wrap should be closer to the internal condition of a complete uncut watermelon than the part of the watermelon that is directly open and refrigerated; If it is concluded that watermelons sealed in plastic wrap are more likely to spoil after overnight than watermelons that are directly open and refrigerated, can it be inferred that watermelons that are not cut are more likely to spoil than watermelons that are cut and refrigerated open, and that watermelons that are not cut and refrigerated are more likely to spoil than watermelons that are cut into small pieces and placed on a plate? <>

Cover the watermelon with plastic wrap and put it in the refrigerator, which will not speed up the growth of bacteria.

Putting the watermelon covered with plastic wrap and putting it in the refrigerator actually slows down the reproduction rate of bacteria. This is because the low temperature environment can inhibit the activity and reproduction of bacteria. Refrigerators are usually set at a lower temperature, conditions that are not conducive to the proliferation of bacteria.

The function of plastic wrap is to prevent air, moisture and other microorganisms from entering the inside of the watermelon, reducing the evaporation of water on the surface of the watermelon. This can effectively extend the shelf life of watermelon and slow down the spoilage process. Plastic wrap creates a physical barrier that makes it difficult for bacteria to spread to the surface of the melon through the air, reducing the risk of bacterial contamination.

However, it is important to note that if the watermelon itself has been contaminated with bacteria or has broken parts, then plastic wrap does not completely stop the bacteria from proliferating. So, before putting the watermelon in the freezer, make sure that the surface of the watermelon is not visibly damaged or contaminated with bacteria. In addition, whether plastic wrap is used or not, watermelon should also be kept in the refrigerator for no more than a few days to ensure that it is fresh and safe to eat.

Ways to extend the shelf life of watermelon:

1. Temperature control: Store the watermelon in a cool place, avoid direct sunlight or high temperature environment. The optimum temperature is about 10-15 degrees Celsius.

2. Humidity management: Watermelon needs a certain amount of humidity to retain moisture. Watermelons can be placed in a moist environment, such as wrapped in a damp paper towel or placed on a damp towel.

3. Do not wash or cut: In the case of trying not to wash or cut watermelon, you can extend its freshness time. Washed watermelons tend to absorb water and cause them to become soft, while cut watermelons tend to lose moisture.

4. Store Li Chen's position: put the watermelon on a flat surface to avoid damage caused by external forces. It is also possible to place the watermelon in a well-ventilated location to avoid accumulating too much carbon dioxide and ethylene.

5. Isolated storage: Isolate watermelon from other fruits to prevent the ethylene gas released by other fruits from affecting the preservation of watermelon.

Cover the watermelon with plastic wrap and put it in the refrigerator, it will not speed up the growth of bacteria.

In fact, putting watermelon in the refrigerator covered with plastic wrap is a common way to keep it fresh, which can delay the rate at which watermelons spoil. This is because the low temperature environment can slow down the growth and reproduction of bacteria, and plastic wrap acts as a stop bacteria and air from entering the watermelon.

Watermelons rot quickly at normal room temperature because bacteria multiply quickly at the right temperature. But after putting the watermelon in the refrigerator, the temperature drops, and the reproduction rate of bacteria slows down considerably. In addition, the use of plastic wrap can effectively isolate germs from the outside world, reducing the chance of contact with germs in the environment.

In this way, we can extend the freshness of the watermelon and enjoy the fresh taste for longer.

Here's how to pick a sweet watermelon:

1. Look at the appearance.

The appearance of the watermelon is bright and uniform, the texture is clear, the distance between the lines is slightly wider, and the slightly concave part of the texture is the ripe melon when touched by hand, and the melon is sweet to eat, but if the surface of the watermelon is dull and hairy, and the distance between the lines is narrow, the melon is not ripe and the flesh of the melon has more tendons.

2. Handle it by hand.

The same variety, the same size, choose light or not heavy, the same size of watermelon, the light weight is ripe and hungry Xizheng melon, and the feeling of heavy is the raw melon, this is because the watermelon in the growth process with the sun's irradiation of the watermelon inside the melon juice gradually converted into sugar, the weight will also be reduced, and although the raw melon is full of moisture to pick up heavier, but because it is not ripe, it is not sweet and not delicious.

3. Play by hand.

Flick the watermelon skin with your fingers, hear a dull "bang" sound, the more dull the watermelon is more ripe, the watermelon is ripe if you can feel the tremor when you pat your hand, and the tremor of the limbs and fingers is not enough to shout that the melon is not ripe or the skin is too thick, if the "poof" sound is made when you beat it, the watermelon is overripe and not delicious.

4. Look at the melon vines.

If the melon vine is relatively straight, or the color has turned yellow and the melon vine is withered or dry, such a melon is either premature or dieffania and not fresh.

5. Look at the umbilical cord of Guatigua.

Choose a melon navel with a small navel, don't choose a melon navel with a large one, the melon part and the melon navel have depressions, and the surrounding fullness indicates that it is a ripe melon, otherwise the watermelon is not ripe and not sweet.

6. Specific elasticity.

The skin of the melon is thinner, and the fragile one is pressed with the fingers, which is a ripe melon; If you scratch it with your fingernails, it will crack, and if the melon is soft, it is an overripe melon.

Summary. Watermelon wrapped in plastic wrap and stored in the refrigerator can indeed breed bacteria.

Watermelon wrapped in plastic wrap and stored in the refrigerator can indeed breed bacteria.

Watermelon is an annual vine; The stems and branches are stout and have distinct ridges. tendrils pubescent, petioles densely pubescent; The leaf fragments are white-green, papery, triangular-ovate, the leaves are 3 deeply lobed, the middle lobes are longer, obovate, oblong-lanceolate, or lanceolate, and the lobes are pinnate or double-pinnate shallow-lobed.

Hello! I found out that the watermelon covered with plastic wrap and put it in the refrigerator will not speed up the reproduction of bacteria, and the watermelon covered with plastic wrap itself will not lead to bacterial growth, and the environment and temperature are the causes of bacterial growth. In addition to containing a lot of water, watermelon is also rich in glucose, sucrose, malic acid, fructose, protein amino acids, lycin and vitamin C, etc., which are all substances that bacteria like, so it is easy to breed bacteria.

Therefore, after the watermelon is cut, the bacteria contained in the watermelon ruler grinding mess come from many aspects, including bacteria on the knife surface, bacteria in the air and bacteria on the melon skin. The above mausoleum file information** in today's headlines.

With the arrival of summer, watermelon has become the fruit of choice for people to quench their thirst. For many people, putting the cut watermelon in the refrigerator is to make the watermelon taste more refreshing and delicious. However, there is a widely circulated saying that watermelon covered with plastic wrap and put in the refrigerator will accelerate the growth of bacteria and lead to unsafe food, is this true?

First of all, it should be clear that watermelon itself contains a certain amount of acidity and edible fiber, which has an inhibitory effect on the reproduction of bacteria. In addition, as a material, plastic wrap is not easily attacked by bacteria, so it will not become a breeding ground for bacteria. At the same time, the low temperature and low humidity in the refrigerator will also inhibit the growth of bacteria on the watermelon.

Secondly, in order to ensure food safety, it is recommended to wash the watermelon before placing it. There may be some impurities such as bacteria and dust on the surface of the cut watermelon, and it can be effectively reduced by washing it before putting it in the refrigerator. Alternatively, you can choose to put the cut watermelon in the refrigerator in a food crisper to better preserve its freshness.

In summary, putting watermelon in the refrigerator covered with plastic wrap does not cause bacteria to multiply, but it still needs to be cleaned and stored to ensure food safety. Healthy eating starts from the details, so that you can better enjoy the deliciousness and health of fruits.

Watermelon covered with plastic wrap and put in the refrigerator will not speed up the reproduction of bacteria.

The function of plastic wrap is to inhibit microorganisms such as bacteria, while refrigeration is also a beneficial way to store watermelon. Therefore, covering the surface of watermelon with plastic wrap and refrigerating it can not only prevent a large loss of watermelon moisture, but also avoid cross-contamination with other foods.

After all, watermelons are relatively large, and they can't be eaten at one time, so many people will choose to cover the surface with a layer of plastic wrap and put it in the refrigerator to refrigerate, on the one hand, it can prevent watermelons from smelling with other foods in the refrigerator; On the other hand, it can also prevent a large loss of water in the western jujube rock letter melon, and prevent it from cross-contamination with other foods, which is a very reliable practice.

Watermelon growing environment:

1. Watermelon likes warm, dry climate, not cold-tolerant, the optimal temperature for growth and development is 24-30 degrees, the optimal temperature for root growth and development is 30-32 degrees, and the minimum temperature for root hair occurrence is 14 degrees.

2. Watermelon needs a large temperature difference between day and night during the growth and development process.

3. Watermelon is drought-tolerant, not tolerant to stool wheel moisture, and when it is rainy and rainy, the humidity is too high and it is susceptible to disease.

4. Watermelon likes light, and watermelon has a long growth period, so it needs a lot of nutrients.

5. With the growth of the plant, the amount of fertilizer required for watermelon gradually increases, and reaches the maximum value when the fruit grows vigorously.

6. Watermelon has strong adaptability, and the sandy soil with loose soil, deep soil layer and good drainage is the best. Likes weak acidity, pH 5-7.

Summary. No, watermelon covered with plastic wrap and put in the refrigerator will not speed up the reproduction of bacteria.

No, watermelon covered with plastic wrap and put in the refrigerator will not speed up the reproduction of bacteria.

Watermelons are relatively large and cannot be eaten at one time, so many people will choose to cover the surface with a layer of fresh-keeping film and put it in the refrigerator for refrigeration. However, there are rumors on the Internet that bacteria prefer to live on soft plastic like plastic wrap, which will speed up the reproduction of bacteria, and eating such watermelons is more likely to cause food poisoning.

In fact, refrigerating the preservation of plums is a favorable way to store watermelon, and covering the watermelon with Youchi plastic wrap can prevent the watermelon from smelling with other foods in the refrigerator on the one hand; On the other hand, it can also prevent a large amount of water loss in watermelon and prevent it from being polluted with other foods, which is a very reliable practice.

The main component of plastic wrap is polyvinyl chloride, and the national standard GB T 10457-2009 "Plastic Self-adhesive Plastic Wrap for Food" has made strict requirements for the safety of plastic wrap. In other words, as long as the plastic wrap used is a product produced by a regular manufacturer that has been inspected and determined to be qualified, there is no need to worry about the presence of microorganisms that contaminate the food. The plastic wrap itself is a waterproof product, and it also prevents food from coming into contact with the air, which can basically block most of the conditions for the growth of spoilage microorganisms.

Food wrapped in plastic wrap naturally contains fewer microorganisms than unwrapped, of course, there may be some special for a small number of anaerobic bacteria.