1. Zhongtai Shares (300435): According to the 2020 annual report, Zhongtai Shares achieved a net profit of 65,438+96 million yuan, a year-on-year increase of 153.25%.
2. Low temperature shares (300540): the net profit in 2020 was 9.427 million, up by 27. 1 1% year-on-year. The company plans to cooperate with Yahai in Inner Mongolia in the field of helium extraction.
3. Heyuan Gas (00297 1): The company's net profit in 2020 was 87.09 million yuan, a year-on-year increase of 3.04%. The company's special gases such as high-purity hydrogen, high-purity helium, oxygen, nitrogen and argon have been used in semiconductors, chips and integrated circuits, and some customers have income.
4. Ice wheel environment (000811): the net profit in 2020 will be 223 million.
Neon is a colorless, odorless and nonflammable rare gas. Usually neon gas can be used as the filling gas of colored neon lights displayed in outdoor advertisements; In addition, it can also be used for visible light emission indicator, voltage adjustment and laser mixing components.
After discovering argon and helium, william ramsey, a British chemist, found that their properties were not similar to those of other discovered elements, so he proposed adding a group of new chemical elements to the periodic table of chemical elements. According to Mendeleev's hypothesis about the periodic classification of elements, he speculated that the family should also have an element with an atomic weight of 20.
During the period of 1896 ~ 1897, Ramsey, with the help of Travis, tried to heat rare metal minerals in the same way as he discovered helium to obtain the elements he predicted. They tried many minerals, but found none. Finally, they thought of separating the gas from the air. However, it is very difficult to remove argon from the air, and chemical methods are basically impossible. Only by changing the air into a liquid state first, and then using the different boiling points of its components, can it be turned into gases one by one and separated one by one. 1On May 24th, 898, Ramsey got a small amount of liquid air from Hampson, England. Ramsey and Travis first separated krypton from liquid air. Then they repeatedly liquefied and volatilized the separated argon to collect volatile components. 1898, 12 in June, they finally found neon, the element symbol ne, from the Greek Neos (new).