What is the difference between selenium-enriched eggs and ordinary eggs? Should eggs be stored in the refrigerator?

Eggs are the best choice for people who need to supplement protein every morning. They are widely used. In recent years, people pay more attention to organic food, and selenium-rich eggs often appear in people's perspective. The most important thing is that they are rich in selenium and have large yolks. They contain many trace elements and are called the ginseng of eggs. What are the specific and detailed differences between the two? Let's take a look at the following description of the differences.

Contents of this article

1. What is the difference between selenium-enriched eggs and ordinary eggs?

2. Egg density

3. Should eggs be stored in the refrigerator?

What is the difference between selenium-enriched eggs and ordinary eggs?

Selenium-enriched eggs contain 40-60 times more selenium than ordinary eggs. Selenium-enriched eggs refer to eggs with a selenium content of 0.2-0.5 mg/kg, which is produced by adding sodium selenite compound, selenium-containing yeast and organic selenium to chicken feed. Formulated feed is a high-selenium diet made from natural plant organic selenium, multiple vitamins and Chinese herbal medicines.

Selenium-rich eggs use the healthy chicken body as a conversion factory, allowing the chicken to maintain a dynamic balance of selenium in the body during the egg-laying cycle and continuously produce high-selenium eggs containing selenoprotein.

Since the chemical composition of egg protein is very similar to that of human protein, the converted selenoprotein can be well absorbed by the human body.

Egg density

The density of a raw egg is 1.1g/cm3, slightly higher than water. An egg will sink to the bottom in water, but if you add some salt to the water, it will float again, so the density of an egg is slightly greater than water but less than salt water. However, the volume or density of a substance will change accordingly with changes in temperature and pressure.

The relationship between the three physical quantities of temperature T, pressure p and density ρ (or volume) is called the equation of state.

Generally speaking, the main physical quantities that affect the density of matter are pressure and temperature.

The density of a liquid depends mainly on the composition of the liquid and is less affected by temperature.

Should eggs be stored in the refrigerator?

Eggs can be stored in the refrigerator or at room temperature. Generally speaking, eggs can be stored for 7-15 days at room temperature and 20-30 days in the refrigerator. The specific time depends on the cleanliness of the eggs and the humidity and temperature of the storage environment.

There is an empty space in each eggshell without egg liquid. This structure is called an air chamber. The air chamber is usually at the big end of the egg. In order to make the egg last longer, you can put the small end of the egg downward to reduce the chance of the egg liquid coming into contact with the air.

It is best not to store eggs together with ginger and onions, because there are many pores on the eggshell. The strong smell of ginger and onions will penetrate into the eggs through these pores, causing the eggs to change taste and deteriorate.