The main chemical component of protein is a kind of protein. When eggs are kept for a long time, some protein in protein will break down into amino acids. The chemical structure has an alkaline amino group -NH2 and an acidic carboxyl group -COOH, so it can interact with acidic and alkaline substances.
Therefore, when people make preserved eggs, they will add some alkaline substances such as lime, potassium carbonate and sodium carbonate to the mud. They will pass through the holes in the eggshell and combine with amino acids to form amino acid salts. These amino acid salts are insoluble in protein, so they crystallize in a certain geometric shape to form beautiful pine flowers.
Eating too many preserved eggs is harmful;
1, leading to decreased immunity: if preserved eggs are eaten too much, a large amount of lead and its compounds will be absorbed through the skin, which may be harmful to human health, especially affecting hematopoietic system, nervous system, kidney, gastrointestinal tract, reproductive system, cardiovascular system, immune and endocrine system, etc.
2. Food poisoning: There are only 400-500 bacteria on clean eggshells, but there are as many as 65.438+400-400 million bacteria on dirty eggshells. Salmonella is the main bacterium that pollutes preserved eggs. After it enters the human body with preserved eggs, it causes inflammation on the mesentery, and after bacterial fission, it will produce highly toxic endotoxin, which will cause poisoning symptoms.
Refer to the above? Baidu Encyclopedia-preserved eggs (domestic processed eggs), People's Daily Online-What happens when you eat preserved eggs every day? Who can't eat preserved eggs?