How to identify fresh eggs? Is there any other way besides drainage?

● How to choose eggs-Hold the eggs in your hand, gently shake them to collide with each other, and listen carefully. Good quality fresh eggs, eggs collide with each other, the sound is crisp, and the eggs shake silently. ● The magical use of eggshells-wash and break the eggshells, put them in an iron pot and fry them with slow fire (don't burn them), and then grind them into powder, the finer the better. Take an egg shell every day, and take it with water 2-3 times before or after meals. It has analgesic and antacid effects on patients with duodenal ulcer, stomachache and hyperacidity ● Preservation tips-it is well known that the eggs bought must be kept in the refrigerator. But put it with the big head up and the small head down. I'm afraid you don't know, do you This can not only prevent microorganisms from invading the yolk, but also help to ensure the quality of eggs. How to distinguish fresh eggs when eating hot pot? Some people are used to adding eggs to hot pot and cooking them together, while others are used to making sand tea sauce. But anyway, the point is still on an egg. If the eggs are fresh, they taste good. If it's not fresh, hang up the emergency room. I'll introduce you to two different ways: 1. See if there is any protrusion on the appearance of the egg. The more bumps, the fresher. On the contrary, the smoother the appearance, the less fresh it is. 2. soak the egg in cold water, if the egg is:? 1? 7A Lying flat is very fresh. ? 1? 7B leans in the water. This egg has been laid for 3-5 days. ? 1? 7C standing upright in the water, this egg is 10 days. ? 1? This egg has been floating on the water for 7 days and has gone bad. I wish your family good health. How to tell good from bad when buying eggs? Put the eggs in a basin filled with water. If an egg sinks in the water, it is fresh, and a floating egg is bad. This is because fresh eggs are heavier than water, so they will sink in the water. When eggs are broken, protein will produce gases such as ammonia and hydrogen sulfide. There is gas in the eggshell, and the specific gravity of the egg will be smaller than that of water, so it will float in the water. These six kinds of eggs must not be eaten. How to buy fresh eggs and how to eat more nutritious can be said to be a cliche. Everyone already knows, but do you know which eggs can't be eaten? 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. Rotten egg: The eggshell turns dark gray due to the invasion and reproduction of bacteria in the egg, and even breaks due to the expansion of hydrogen sulfide gas inside. However, the mixture in the egg is grayish green or dark yellow, smelly and inedible, otherwise it will cause bacterial food poisoning. Yellow scattered eggs: due to severe vibration such as transportation, the yolk membrane is broken, resulting in mechanical yellow scattered; 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. 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. In addition, there are diarrhea eggs, blood gluten eggs and so on. It is generally not suitable for buying and eating. A healthy life comes from a healthy diet. Let's remember the healthy way to eat eggs! Don't eat fried eggs and fried eggs at roadside stalls, those eggs may be cheap eggs that have gone bad! Three misunderstandings in buying eggs ■ The color of eggshell has nothing to do with nutrition. Eggshell colors can be divided into white, light brown, brown, dark brown and cyan. Some people like red-shelled eggs, while others like green-shelled eggs, thinking that they have higher nutritional value. In fact, the nutritional value of eggs is not necessarily related to the color of eggshells. As far as the nutritional value of eggs is concerned, it mainly depends on the nutritional structure of feed and the feeding situation of chickens, and has little to do with the color of eggshells. Generally, the shell color is the darkest in the early stage of spawning, and then gradually becomes lighter. Eggshells of hens with high egg production are lighter in color. The color depth of eggshells can be changed by breeding. Therefore, the color of eggshell can not be used to judge whether it is a free-range egg or not, and its nutritional value is high. ■ Not all eggs are small, but the egg weight of free-range eggs is greatly influenced by genetic factors, and the egg weight under different varieties and strains is different; Physiological stage also affects egg weight, and nutritional factors and feed management also have some influence on egg weight. In the past, free-range eggs were small in weight, but not all of them were free-range eggs. With the development of modern science and technology, people can cultivate chicken breeds with different egg sizes according to their needs. ■ "Red egg" may be caused by pigment. Many people always like to buy "free-range eggs" when buying eggs, and think that eggs with golden yellow or reddish brown yolk are free-range eggs. In fact, this standard is not scientific. In the past, the yolk of an egg was pale yellow in winter and turned golden yellow in summer. But now the season no longer plays a role in the color of egg yolk. In order to make laying hens lay more eggs, the yolk of ordinary eggs is made light yellow through feed. In order to make eggs "red hearts", pigments must be added to feed. For this reason, the eggs we paid extra money for are likely to be added with pigment. Therefore, the color of egg yolk can not be used to judge whether it is a "free-range egg". Therefore, when buying eggs, you should have a clear aim and don't have to think too much about the color of yolk and eggshell. However, we should pay attention to the indicators such as whether the color of the eggshell is uniform (usually very positive), whether the eggshell is smooth, and the shape of the egg should not be too long or too round. If the color of the eggshell is uneven or the eggshell is rough, it may be the eggs laid by unhealthy chickens. (Reporter Yan Zheng) Experts teach you how to choose eggs. After the Spring Festival on April 3rd, 2003, domestic and free-range poultry from farmers all over the country once again entered the laying season, and a steady stream of eggs flowed into cities, providing more choices for citizens. In bazaars or supermarkets, people are used to calling large brown-shelled eggs produced by large-scale caged hens in chicken farms "foreign eggs" and small pink-shelled or brown-shelled eggs produced by a free-range chicken in rural areas "native eggs". The former costs about 500g from 2 yuan to 2.2 yuan, while the latter is sold above 4.5 yuan. In terms of quantity, slightly larger eggs only need to be sold for 48 ~ 50 cents. As for those rich eggs, green eggs and white eggs that are beautifully packaged and printed with trademark symbols, the most expensive ones sell for more than 7 yuan per 500g. So, why are the prices of eggs so different? What problems should I pay attention to when shopping? Recently, the reporter visited relevant people and nutrition experts in agriculture, animal husbandry and food departments and learned some little-known information. At present, most of the foreign eggs on the market come from rural collective and self-employed laying hens farms, and the breeders are generally Issa Brown, Hesse Brown and Blue Ocean Brown provided by state-owned or joint-stock companies. If it is properly managed and raised, the chicken farm will still make money if it consumes 2.2 kg to 2.5 kg of egg feed per kg, and each chicken lays eggs 15 ~ 18 kg per year on average. This kind of "foreign eggs" is purely feed conversion, and the nutrition is incomparable with the "earth eggs" produced by farmers' free-range chickens. Moreover, due to centralized feeding, farmers often add some flavomycin, olaquindox, oxytetracycline or "quick cure-100 compound antibiotics" to their feed every once in a while, and some of these drugs are bound to remain in eggs. If it exceeds the food safety standards, people will definitely be harmful to their health if they eat it for a long time. Since the Ministry of Agriculture implemented the "Pollution-free Food Action Plan" in July last year, all localities have strengthened the publicity and education on food safety. However, the supervision of farms is relatively backward, and the market access system for eggs has not yet been implemented, which makes the safety of commercial eggs worrying. Experts suggest that consumers must look for quality certification when buying "foreign eggs", especially "pollution-free food certification". Up to now, only the products of Shuijiahu Mechanized Chicken Farm, Hefei Wangzheng Livestock and Poultry Company and Guangde Rong Da Poultry Company have passed the provincial pollution-free certification. In addition, the "foreign eggs" produced by Hefu Zheng Da Company, a joint venture between Zheng Da Group of Thailand and Anhui Feed Factory, have also been confirmed by relevant departments as "no drug residue" and can be safely eaten. Are the "earth eggs" produced by farmers' chickens safe and reliable? Not exactly. On the edge of the "Hechaowu" highway, the reporter saw several grass chickens raised by farmers. This is a high wall made of thin bamboo poles, enclosing an open space the size of a basketball court. Hundreds of grass chickens pecked at the rice and wheat bran mixed vegetables fed by their owners in the fence. Experts believe that the problem is that some farmers like to dry rice and wheat on asphalt pavement, and the harvested grains are often mixed with heavy metals such as lead, cadmium and arsenic and carcinogenic chemicals. When the market is desperate, they feed it to chickens and ducks. This kind of "earth egg" is not as safe as ordinary "foreign egg". Now there is a kind of "earth egg" produced by "foreign chicken", which is worth recommending. In an interview with Huoshan County, the reporter found that the county Tianyuan Agriculture and Animal Husbandry Co., Ltd. screened out "foreign chickens" with high egg production rate and provided a large number of chickens hatched by farmers in mountainous areas with no pollution and good environment. They are scattered in Ge Yuan, Yutian and hillside, mainly eating wild vegetables and weeds, and feeding some food appropriately. They don't need antibiotics at all except vaccination. At present, this kind of "earth egg" that has passed the provincial pollution-free certification sells very well in major supermarkets. The price of 500 grams is around 5 yuan, and people are eager to buy it. There is also a kind of so-called "foreign egg" born by "native chicken", which is a powder-shelled egg newly introduced from a chicken farm. Its volume is very small, which is very similar to that produced by a grass chicken, and the price per 500g is much higher than that of 3 yuan. This is only produced by a large number of hybrid laying hens caged in some chicken farms to cater to the public's taste. Because of the high price, farms pay more attention to the proportion of feed and try to avoid using antibiotics. Safety and nutritional value are indeed higher than ordinary "foreign eggs". At present, the highest selling price on the market is the "gift egg", that is, the "foreign egg" born by Shanxi authentic "foreign chicken"-the white "Goodman" egg with both raw and cooked functions. For every 500g of retail in 7 yuan, there are 3,000g and 4,000g in the basket. According to experts, this is the preferred American "Hailan White" chicken breed, which is raised in unpolluted rural areas. High-tech biotechnology is used to prevent and treat diseases instead of antibiotics and other drugs. A variety of trace elements, vitamins, amino acids and effective biota are added to the feed. The cholesterol of eggs is 70% lower than that of grass eggs, while the contents of protein and lecithin are several to ten times higher than that of grass eggs, which has passed the national "green" certification. Unfortunately, many eggs in the basket are not very fresh because of the long distance and high price. People must see the date of production marked on the basket when buying. How to identify the eggs I ate in Deqing rural area during the New Year? Because I want to try eggs from Deqing these days, I studied the difference between the eggs laid by chickens in greenhouses (that is, chickens fed with feed) and chickens raised at home (without feed). There are the following points: 1. The eggs in the shed are relatively large, about 8-9 per catty (this is not absolute, and photos will be posted later). This egg is relatively small, about10/1per catty (the first-born egg is relatively small, as good as that in pigeon eggs, hehe) (because the chickens in the shed are all hybrid chickens, which gain weight quickly and generally). Egg yolk is big, with little protein, full and spherical. The egg white of this egg is clear, but the egg white of the closed shed egg is mixed (comparatively speaking). 3. Close the shed egg and cut the egg in the middle when cooking. The yolk of an egg in a closed shed is small, but the yolk of this egg is big (this is obvious), and the egg protein of an egg in a closed shed is thick when eating. In this experiment, I knocked on four eggs in closed shed, boiled two eggs in closed shed and knocked on four eggs. If you don't believe me, you can try it (you must compare it together, otherwise you won't see it. As the saying goes, you are not afraid of not knowing the goods, but you are afraid to shop around, hehe). In addition, I think the color of egg yolk is not very important, because it has something to do with what the chicken eats. My eggs are golden yellow. We feed rice, millet, chaff, vegetable leaves and astragalus bones (my father goes to the market to get them every day). Today, we went to a friend's house to get 10 Jin of eggs (because my family didn't have enough eggs). His chickens are also stocked and not fed. He feeds corn, chaff, leaves and vegetables. In fact, I think, as long as they are raised by themselves and whole grains, the eggs born are traditional eggs. What do you think?