Chicken eggs are easy to buy and have high nutritional value, and are a common ingredient in refrigerators at home. Commercially available chicken eggs can be divided into two types: washing eggs and bulk eggs. Bulk eggs are mostly sold in traditional markets and stores. Washed eggs are sold in boxes after cleaning. Chen Zhiwei, acting director of the Poultry Industry Department of the Animal Husbandry Department of the Ministry of Agriculture, said that the difference between the two is mainly that the eggs are washed and washed, and the remaining chickens, feathers and other residues on the egg shell are washed away. After drying, the box can reduce the chance of contacting salmonella and melanin on the egg shell.
Washing the eggs will remove the protective film and apply mineral oil to prolong storage.Chicken eggs have a "marketing system", so egg dealers and egg farmers buy chicken eggs. They go to the chicken egg shop for about one to two days to collect eggs, and pack them in plastic egg boxes to purchase them at the announced price. There are about 200 chicken eggs per basket.
Chen Zhiwei said that if the plastic egg box is purchased directly by the public, it is to distribute the eggs; if it is cleaned and then sold in a box, it is to wash the eggs. The two may even come from the same egg field, only depending on whether to clean it, but it can cause an egg to be priced at about 4 yuan.
Chen Zhiwei said that the shell of the eggs produced by the mother chicken will have a layer of protective film to avoid bacterial invasion. The washing of the eggs after the cleaning process will remove the protective film. Therefore, some egg makers will apply mineral oil on the egg shell to extend the shelf life.
Eggs with cold chains and mineral oil throughout the process can be stored for 30 to 40 days.In addition, washing eggs are also divided into refrigerated and non-refrigerated eggs. Some businesses choose to store all the eggs from shipment to cool-linked volumes, while others choose room temperature and cold-linked eggs for longer shelf life. Wash the eggs and keep them in refrigerated throughout the process. They can be stored for about 10 to 20 days. If there is a lotion of mineral oil, the storage can be extended to more than 30 to 40 days. If the non-washed eggs are left in the sun, they can also be stored for 10 to 20 days, but environmental factors such as exposure to the sun in the sun will also affect the shelf life.
According to the Food Safety Weekly Report of the Food and Drug Administration, chicken eggs are divided into red and white shells, mainly because the egg shells have different colors. White shell eggs are more common on the market and the price is lower. However, the nutritional value and main nutrients of the two are not obvious. Trace elements may be affected by the feed and have some slight differences.
It is best to buy at one time, and avoid putting egg boxes in the refrigerator door.Whether it is washing eggs or dispensing eggs, refrigeration can help extend the shelf life. Chen Zhiwei said that the first action of buying eggs home can be stored in the refrigerator. The temperature of the refrigeration makes the eggs less likely to change in quality and extend the shelf life. However, it is still not recommended that the public buy too many eggs at a time to store them. It is recommended to buy the amount of eggs at a time as needed for a week.
Food and Drug Administration reminds that chicken eggs are best stored at temperatures of 0°C to 4°C. They can be stored in the original packaging box and avoided on the storage rack on the door because their temperature changes are larger. In addition, it is best to cook the eggs immediately after they are knocked to avoid bacterial growth; when beating eggs, it is recommended to prepare an extra bowl, first beat the egg into the bowl, then beat the second egg into the second bowl, and make sure it is not damaged and then pour it back into the first bowl to avoid any bad eggs being mixed in.
Eating cooked eggs is safe and sterile and can absorb protein intact.The Food and Drug Administration pointed out that it is an important principle to cook eggs thoroughly. It should be heated until the central temperature is above 70°C, and the heating time should be long. The National Health Administration said that the biogenic protein contains white protein (Avidin), which can inhibit the human body's utilization and absorption of biotin (Biotin). Cooking the eggs can not only destroy white blood cellulose but also eliminate bacteria and avoid the risk of pathogenicity. The protein in the eggs will be easily absorbed by humans after heating.
Chen Zhiwei pointed out that whether the eggs are washed clean before putting them in the refrigerator can be determined according to personal habits, but it should be avoided to be taken out for storage after refrigeration to reduce the quality of the eggs. After touching the egg, you should wash your hands. Before beating the egg, you should also wash the egg shell first. When washing the eggs, you should wash off the outer layer. When dispensing the eggs, you should also wash them to avoid the chicken feathers left by the shell that cause infection.
If the chicken egg exceeds the shelf life, you can first observe it. Chen Zhiwei said that if there are cracks, spots on the outside of the egg shell, or if the egg liquid flows out, it is recommended to discard it; if the egg is longer and more severe, the odor will be noticed. In addition, if the egg whites are not clear after the eggs are knocked open, it is recommended not to eat them.
Responsible editor: Gu Zihuan