What is the phenomenon of egg yellowing? How to identify scattered yellow eggs

People who cook have probably seen this phenomenon. The yolk of the opened egg and the egg white are mixed together, just like the egg liquid they want to beat. Then this phenomenon is that the eggs are yellow. Can you eat them when they are yellow? How to see if the eggs have gone bad?

The reason why eggs turn yellow

Due to severe vibration such as transportation, the yolk membrane is broken, resulting in mechanical yellowing; Or stored for too long, bacteria or molds invade the egg body through the pores of the eggshell, destroying the protein structure and causing the egg liquid to be yellow and turbid. If the yellowing is not serious and there is no odor, it can still be eaten after high temperature treatment such as boiling. But if bacteria multiply in eggs, protein has degenerated and can't be eaten with bad smell.

How to tell whether an egg has gone bad?

We use the egg soaking method: put the eggs in a small basin filled with water. If the egg is inclined in the water, even vertical in the water, it means that the egg is old, but it has not gone bad; If the egg is horizontal in the water and sinks to the end, it means that the egg is still fresh; If the egg floats on the water, it means that the egg has gone bad.

As can be seen from the above picture, one is completely vertical in the water, and the other is inclined in the water, but it does not float on the water, which means that the egg I bought has been placed for too long and belongs to old eggs. Can I eat it?

We adopt a direct method, that is, open the egg to see the dispersion degree of yolk and protein: if the yolk and protein are not mixed together, they can be eaten; If the egg yolk and protein are mixed together, but it is not particularly serious and has no odor, it can still be eaten after high temperature treatment; If it is yellow and turbid, the egg liquid is thin and turbid, indicating that it has deteriorated and is forbidden to eat.

As can be seen from the above picture, the egg liquid is turbid and there are mildew spots on the eggshell. If you smell it through your nose, it will smell slightly moldy. Such an egg means that it is inedible and has become a spoiled egg. You can just throw it.

5. How can we store eggs so as not to go bad? There is still a lot of learning in life.

Try to store eggs in the refrigerator. When placing, put the protruding tip down and the big head up, and put it directly vertically, not horizontally.

If eggs are accidentally broken or broken, they should be eaten as soon as possible.

Don't eat these eggs.

Cracked eggs: During transportation, storage and packaging, some eggs will crack and break due to vibration, extrusion and other reasons, and are easily invaded by bacteria. If they are left for a long time, they should not be eaten.

Sticky shell egg: This kind of egg, due to long storage time, the yolk membrane becomes weak from toughness, and the yolk clings to the eggshell. If it is local redness, it can be eaten. However, if the egg membrane is close to the eggshell, it is dark black outside the skin and has an odor, it is not suitable for eating.

Stillborn eggs: eggs that are contaminated by bacteria or parasites during incubation, coupled with poor temperature and humidity conditions, cause embryos to stop developing are called stillborn eggs. The nutrition of this egg has changed. If you die for a long time, protein will decompose and produce a variety of toxic substances, so it is not suitable for eating.

Moldy eggs: When some eggs are exposed to rain or moisture, the protective film on the eggshell surface will be washed away, causing bacteria to invade the inside of the egg and become moldy, resulting in black spots and mildew spots on the eggshell. This kind of egg is not suitable for purchase either.

I warmly remind: it is an indispensable nutritious food in our daily life, so we must be careful when buying eggs, and try to buy eggs that look fresh and high quality. Through the above methods, I believe everyone has understood how to identify spoiled eggs ~