1, pu is the abbreviation of polyurethane, which is a new type of organic polymer material and is known as "the fifth largest plastic".

2. Pu also refers to the uncertainty of parents and children, which is the uncertainty of men to their offspring.

3. Pu is also a Polynesian musical instrument-Loudou leaf mat.

4. In physics, pu is a nominal value, which is a commonly used numerical annotation method in power system analysis and engineering calculation.

5. Plutonium is the symbol of chemical element Plutonium, which is a radioactive element and an important raw material for atomic energy industry.

6. In addition, PU is a pasteurization device. The sterilization effect caused by 60℃ 1 min is a pasteurization unit, that is, a PU value.

Related introduction:

Plutonium and its isotopes are dangerous because of their radioactivity. Alpha rays produced by plutonium will not penetrate the skin and enter the human body, but plutonium may be inhaled or digested and enter the human body, thus adversely affecting internal organs. Alpha rays can cause cell damage and chromosome damage, which may theoretically lead to an increase in the incidence of cancer.

But this effect will not be more harmful than other radioactive substances that can emit alpha rays. In contrast, plutonium has a long half-life, which makes the radiation per unit time relatively small and less harmful. Radon, which exists widely in nature, is much more harmful than plutonium. Plutonium tends to accumulate in human liver and bones, but this process is very slow.

In the 1940s, 26 workers in the United States were contaminated by plutonium for nuclear weapons research. However, there was no serious impact on their health and no one died.