When it comes to some of the best food in the world, eggs are probably one of the best.
An egg contains about 7 grams of protein, all eight kinds of amino acids needed by the human body, rich in lecithin, and the protein type and amino acid composition ratio in the egg are very perfect, second only to breast milk.
Coupled with the fact that the price itself is not expensive, and there are various ways to make it, who will not love eggs?
However, although eggs are delicious, storage is a science, and a careless egg will cause it to deteriorate and spoil.
For example, after many people buy eggs from the supermarket, they always feel that the eggs will have egg feces, and it will not be clean to put them directly into the refrigerator, and they will choose to remove the impurities on the surface of the eggs with water first, and then put the refrigerator preservation layer to save.
But in fact, this clean and hygienic action is not conducive to egg preservation.
After consumption, it will cause diarrhea, vomiting, fever and other food poisoning phenomena, and when the symptoms are severe, it will even "kill you".
After washing the eggs and putting them in the refrigerator, what is the problem?
In order to study the changes brought about by cleaning eggs, the relevant researchers have conducted the following controlled experiments.
Divide the same batch of eggs into two groups of equal quantities, one of which is washed with clean water and placed in the refrigerator, and the other group is placed directly in the refrigerator. After five days of taking it out, it was found that there was not much difference in appearance between the two.
After opening the egg shell, it is found that the washed egg yolk cannot form a stable oval shape, the yolk is scattered, and the color is darker and has a certain taste. In contrast, unwashed eggs do not react similarly.
This experiment proves that before the eggs are placed in the refrigerator, they cannot be washed with water, otherwise the shelf life of the eggs will be shortened and the spoilage will be caused.
Why does washing eggs exacerbate egg spoilage?
As we all know, the egg shell is hard, its composition is mainly calcium carbonate, and there are fine channels to communicate with the outside world.
In general, the outer part of the newborn egg has a layer of gelatinous substance, and they form a special protective film, that is, the "outer shell protective film", which partially blocks the internal communication between the egg and the outside of the air.
If you use clear water eggs, this protective film will be damaged.
Bacteria such as Salmon's can multiply in abundance through the internal cracks of eggs, causing eggs to spoil.
After humans eat such eggs, they will vomit, high fever, diarrhea and other symptoms of digestive tract poisoning, and even death.
Eggs must be placed vertically so that they will not deteriorate easily?
Some people think that the storage of eggs is also learned, if the eggs are placed horizontally, because the proportion of egg yolk is smaller than the protein, the yolk will float up, close to the eggshell, it will become a sticky shell egg.
Rest assured!
In fact, the fixed yolk in the egg is an egg band, the floating range of the yolk is not large, and the yolk will still be fixed. At the same time, some scholars have also studied the placement of eggs and found that placing eggs horizontally is more conducive to keeping the yolk in the middle.
Of course, Dr. Xiaokang does not recommend that you put the eggs horizontally at home, after all, the refrigerator space is limited, and it is too inconvenient to occupy the ground.
Eggs removed from the refrigerator, can not be put back again?
Some people believe that the eggs taken out of the refrigerator will sweat at room temperature, and the bacteria and microorganisms in the water droplets will quickly penetrate into the inside of the egg liquid through the eggshell, and if they are not eaten immediately, they will soon spoil.
But in fact, the egg is not as fragile as imagined, the general refrigerator in the preservation and refrigeration temperature of about 4 ° C, if you encounter high air humidity, the eggs taken out will generally not "sweat".
Even if there are a small number of water droplets, they are all condensed by the water vapor in the air, and there will not be too many bacteria.
In addition, the eggs on the market are not cleaned, and the protective film retained on the surface of the eggshell is still very "stubborn", and the sweat condensation is not enough to destroy.
Therefore, if you find that you don't want to eat the eggs taken out of the refrigerator, you can put them back and don't have to worry so much.
The eggs themselves are not so delicate, and there are not so many taboos, as long as you do not "draw snakes and add feet" to clean, in fact, there is no need to worry too much.
With this effort to worry, it is better to think about how to deal with the eggs bought back?
--- is it boiled? Or fried? Or is it fried?