Preserved egg is one of human wisdom to preserve. Assumed to have originated in Hunan preserved egg. In southern China. During the Ming Dynasty. (AD 1911-2186), the Chinese found that raw eggs are removed in a lime pit, almost two months, with a unique flavor that can be eaten. We have developed a way to make up preserved egg. China is a widespread and common.
In ancient times, preserved egg is easy. By duck egg mask with wood ashes mixed with clay. Then put the lid closed for about two months. It is preserved egg. I used to eat. The development of the use of wood ashes mixed with sodium carbonate, lime, salt and tea leaves, and also adapted to many recipes.
The basic process of the preserved egg. The application of the above ingredients are green tea, lime, salt, ashes mixed with water and clay paste. Then wrap the duck eggs, about 7-10 cm thick.
Then mix the chaff. Packaged in containers such as jars, jar or plastic, wood, paper, oil to cover the air. Stored at 24-25 ° C, open all 7 days to return the egg yolks in the middle of the 40-50 day long, it can be eaten. Closed containers or bury them for 5-6 months.
The eggs are then stored for up to one year.
Whether a formula is preserved egg. One principle is the same material as a base. As always, such as lime, sodium carbonate mixed with sodium carbonate and hydrogen to make water alkaline. The alkaline water is gradually Permeability of the porous egg shells into small egg white and yolk. Will cause a chemical change. The change in the yolk and white are set up like a jelly, and tea. The egg is brown.
The lye water into the egg white and yolk. It will make both the yolk and white have been spotted with a. When the egg whites and yolks have a pH 11.3-11.7 range for the enzymes that convert amino acids into eggs. The heat was like jelly. Enzymes and some change. Sulfur protein in the egg, it becomes sulfuric hydrogen. Basket and ammonia. The only bad feeling as soon as peeled egg. But while on leave. In addition, it is essential to hydrogen sulfide, also contributed to the patient with a brown horse pee.
Preserved egg is believed to be useful in health care, but Gore is not appetizing to eat it. Because some manufacturers will lead to a compound to control the acidity (pH) to stabilize the egg white coagulate it. May lead to the formation of lead sulfide present in the preserved egg. And harmful to the body.
To note that the amount of lead in preserved egg or not. The view from the whites. The dark brown. And transparent manner. The preserved egg with a lead sulfide mixture is thick and very black. Should not be eaten.