How to keep the fruit fresh, how to keep the fruit fresh

Use plastic wrap and put in the refrigerator.

Sometimes, we will always buy a lot of fruits at home, but we can't eat them all, so it's time to keep the fruit fresh, and I will introduce you to the preservation method of the fruit, welcome to read.

1. If the shelf life is particularly short and may rot within one day, the cooling method should be applied. For example, lychee, add about 10 grams of salt to a basin of water, soak for a while and then dry, put it in a fruit ** fresh-keeping bag, put it in the sub-zero freezing layer, and then take it out and thaw it naturally at room temperature. Lychee preservation should not be placed in the fresh-keeping cabinet, reminding everyone.

It is best to store it in the freezer layer at a temperature below zero, and let it thaw naturally after taking it out, because only in this way can the color, aroma and taste of lychee be effectively retained.

2. If the skin is very thick, the fresh-keeping bag insurance method should be applied。For example, watermelon, as long as you take plastic wrap to cover the surface of the watermelon, in fact, it is not right for watermelon to keep fresh just like this, because the watermelon in the cake cabinet looks very easy. But in fact, the deli cabinet will absorb the water from the watermelon skin, so even if it is covered with plastic wrap, it is useless, so the watermelon should be wrapped in plastic wrap and wrapped in plastic wrap together with the skin.

Then squeeze the air out.

3. In contact with air, it is easy to rot'For fruits, apply the shade plus fresh-keeping bag insurance method. As with bananas, the correct way to get bananas should be to put them in a fruit crisper bag. Store in a cool place.

The popular food here reminds everyone not to put bananas in the freezer.

4. Fruits that cannot be cooled down and are easy to spoil are wrapped and preserved at room temperature. Like papaya, papaya is also a fruit that cannot be stored in a refrigerator. Black spots will appear, and although the display cabinet has the effect of absorbing water, once the refrigerated display cabinet is taken out, the temperature difference will cause moisture to appear on the surface of the papaya, and stale black spots will appear.

Store in a cool place. In this way, the papaya can be stored for a long time, and the correct preservation method should be to wrap the papaya in newspaper first, and keep it fresh.

1. Plastic cartons.

This is a new type of carton developed by the Japan Food Distribution System Association in recent years. The researchers used a type of "Ristoval stone" (a type of silicate rock) as an additive for pulp. Because this kind of stone powder has a good adsorption effect on various gases, and it is cheap and does not need low-temperature and high-cost equipment, especially has a long-term preservation effect, and the amount of fresh fruit will not be reduced, so businesses love to use it, and it is unique for long-distance storage and transportation.

2. Microwave preservation.

It is the use of microwave in a very short time (120s) to heat it to 72, and then the processed food in 0 4 environmental conditions on the market, can be stored for 42 45 days, will not deteriorate, very suitable for the off-season ** "seasonal fruit", highly favored by people.

3. Edible fruit preservative.

Edible fruit and vegetable preservative, a translucent emulsion made of sugar, starch, fatty acids and polyesters, is coated on the surface of the fruit to form a sealing film to prevent oxygen from entering the inside of fruits and vegetables, prolong the ripening process, play a role in preservation, and the shelf life of the fruit can be extended to more than 200 days. The most valuable thing is that edible fruit and vegetable preservatives can also be eaten together with fruits and vegetables.

4. Temperature-controlled storage and preservation method.

Temperature-controlled storage and preservation methods can be subdivided into simple storage and preservation, refrigeration and controlled freezing point storage and preservation. Buried, stacked, cellared and ventilated storage are all simple storage methods. Refrigerated fruit preservation uses the lower than the freezing point of fruit tissue to reduce the respiratory metabolism of fruits, the incidence of pathogenic bacteria and the decay rate of fruits, and realize the storage and preservation of fruits.

It is the main form of modern fruit storage. However, in the preservation of refrigerated fruits, it is necessary to pay attention to the different habits of fruits, control the temperature, prevent the occurrence of chilling injury and freezing, and avoid the loss of edible value of fruits. The technology of controlling freezing point storage and preservation has been promoted to achieve the preservation of fruits at freezing point humidity.

5. Origin storage and preservation method.

The method of origin storage and preservation is the traditional method of fruit preservation in China. Cellars in Sichuan, caves in Hubei and caves in the Loess Plateau are all good storage reservoirs. The fruit preservation method of origin storage has the advantages of low investment, simple management, local storage and low energy consumption, supplemented by mechanical refrigeration, room temperature two-phase change atmosphere control and other technologies, and has been widely used in daily life.

When storing fruits with a short shelf life, such as lychees and grapes, you can store the fruits in the freezer layer of the refrigerator. When storing fruits with thick skin, such as watermelon and muskmelon, you can completely cover the surface of the fruit with plastic wrap, squeeze out the air inside, and then put it in a cool place.

Cooling and preservation method is one of the common methods of fruit preservation, this method is generally used for fruits with a short shelf life, such as lychees, grapes, strawberries, and when preserving such fruits with a short shelf life, the fruit can be stored in the freezer layer of the refrigerator.

The fresh-keeping bag preservation method is generally used for fruits with very thick skin, such as watermelon and muskmelon, when keeping this kind of fruit fresh, you only need to completely cover the surface of the fruit with plastic wrap, squeeze out the air inside, and then put it in a cool place.

The room temperature wrapping method is usually used for fruits that cannot be cooled down and are easy to spoil, taking papaya as an example, when preserving a fruit such as papaya, you can first wrap the papaya in a newspaper, and then store the papaya in a cool place, and the papaya can remain fresh for a long time.

Fresh fruits in season are the best, and the freshness will be a little less authentic, hehe.

If you don't have a refrigerator, it's better to use plastic wrap. Some fruits can't be kept in the fridge, like bananas.

The temperature requirements of each fruit are different, some require low temperature, and some require higher temperature. Mastering temperature and humidity is the key. It depends on what kind of fruit you want to preserve.

1.The physical methods mainly include: low-temperature storage, modified atmosphere storage, decompression storage, electromagnetic radiation storage, etc.

Among them, the more advanced preservation technologies mainly include critical low temperature and high humidity preservation, intercellular water structured modified atmosphere preservation, ozone preservation, etc., although these preservations are widely used, but they require special equipment, complex operation, high cost, and have certain difficulties in large-scale use.

2.The main chemical methods are preservatives to keep fresh. At present, common preservatives include: paint applicators, ethylene treatment agents (absorbents), bactericidal and antiseptic preservatives, etc.

If it is used for household preservation, it is recommended to use less chemical preservatives, and most of them are generally used by physical methods, such as low-temperature storage (refrigerator), cellar, exhaust gas seal, or placed in water (low temperature and high humidity).

Different fruit preservation methods are also different. Here's an example.

1. Bananas: The skin of bananas is easy to turn black, the reason is that the roots of bananas will release ethylene to ripen bananas, so wrapping the roots of bananas in plastic wrap can play a role in preservation.

2. Strawberries: The preservation method of strawberries is to mix white vinegar and water 1:1, soak the strawberries in vinegar water for 15 minutes, take them out and drain them, and then put them in the refrigerator for storage, but they still have to be washed again before eating.

3. Grapes: The key point of grape preservation is not to wash, the skin of grapes is a natural protective layer, it is easy to become soft and rotten after washing, it can be stored in the refrigerator at ordinary times, and then washed when you want to eat, and leave a little pedicle when washing, and bacteria are not easy to enter.

4. Oranges: Soak the oranges in baking soda for one minute, drain them and put them in plastic.

5. Peaches and apples: Peaches and apples are relatively non-perishable fruits, but if you want to put them longer, you can wrap them in an airtight plastic bag, and then put them in the tank.

6. Mangosteen: Mangosteen is easy to be oxidized when exposed to oxygen for a long time, so you will see that the mangosteen incoming frame is sealed. Moisturizing is a must for many fruits, and mangosteen is no exception.

Therefore, mangosteen can be moistened, sealed and packed, and placed in the freezer for storage.

7. Pears: The most suitable temperature for storing pears should be between 0 degrees and 15 degrees, and the purchased pears can be wrapped in plastic bags or newspapers and stored in the refrigerator; If the temperature is right, they can also be stored in a wooden box or fruit basket and kept fresh in a cool and ventilated place.

How to keep fruit fresh There is a refrigerator at home, and you can put it on the freshness layer of the refrigerator. But instead of wrapping it in plastic wrap, I put the lamp in a place where the temperature was low with me.

Refrigeration. The fruit is required to be fresh and unwound, and it is best to seal it with a plastic bag. However, whether it is fruits or vegetables, don't leave them for too long, as they won't be fresh after a long time.

It can be wrapped in plastic wrap, refrigerated, or canned

Wrap in plastic wrap and place in the refrigerator.

Each fruit is individually wrapped in plastic paper.

1. Harvesting. 15 days before picking fruit can not be a large amount of irrigation or water, fruit trees can be picked at least 7 days after heavy rain, to prevent the fruit from containing more water and not resistant to storage or rotten fruit, do not pick fruit in rainy days, do not pick fruit if the fog water is not dry, should choose sunny or cloudy day fruit picking. When harvesting Sha Tin pomelo, it is necessary to do "one fruit and two cuts" first cut off the fruit and fruit branches with fruit scissors, and then cut the fruit shoulder flat, hold the bottom of the fruit with the left hand, hold the scissors with the right hand and cut it, and put the fruit lightly into the basket.

2. Freshness. After the fruit is harvested, it should be transported to the house or warehouse immediately, do not let the rain and sun dry, and when stacking the fruit, do not exceed 1 meter high to prevent the fruit from being deformed or internally injured. After 7 days".

Sweating" is available.

1. Dilute 600 1000 times of Zhuhai true green citrus preservative, add 1 gram of 2,4-d fruit wash for 1 2 minutes. The advantage of using this method is that the storage time is as long as 4 to 6 months, the peel is bright, and the color is bright. 2. After soaking 15 20 liquids of Beijing 2-b plastic wrap agent for 30 seconds, remove them and wait to dry, they are packed into special fresh-keeping bags and can be stored at room temperature for 4 6 months.

3. 70% imported methyl tobuzin or carbendazim (4 kg per 4 6 grams of water) plus 1 gram of 2,4-d powder to wash the fruit, and then dry it immediately after it is packed with a special fresh-keeping bag for single fruit, which can be put into storage. After entering the warehouse, we should always check whether the house is leaking, whether there are rat bites, if it is found that it is rotten, it should be picked out immediately, and the window should be opened for ventilation when the temperature in the room is too high, and the window and door should be closed when the temperature is too low. Do not touch the wine during the harvest and freshness period, and do not store the wine in the warehouse, because the fruit will rot in large quantities if it comes into contact with the wine.