Modern inventions in China:
1. Herringbone Railway
Herringbone Railway has a long history and a wide range of applications. It is a simple, economical, efficient and practical type of railway fork section. After the popularization and development of herringbone railway, zigzag and X-shaped railway line intersection modes have been derived, so that trains can quickly change tracks between different railway lines. Zhan Tianyou, an engineer in China in the late Qing Dynasty, skillfully used the herringbone railway to overcome the difficulty of the train climbing safely due to the surrounding high drop terrain environment.
2. Hou's soda process
Hou's soda process, also known as the combined soda process, was founded in 1943 by Hou Debang, a chemical engineering expert in China. It is a method that combines ammonia-alkali process and synthetic ammonia process to produce soda ash and ammonium chloride at the same time. The raw materials are salt water, ammonia gas and waste gas from the production of hydrogen from water and gas in a carbon dioxide synthetic ammonia plant.
this method improves the utilization rate of salt, shortens the production process, reduces the pollution to the environment, reduces the cost of soda ash, and overcomes the shortcomings of the ammonia-alkali method. It once enjoyed a high reputation in the world and was widely adopted. The combined alkali process of converting gas to alkali is unique in China and has remarkable energy-saving effect.
3. Artificial synthesis of insulin: In 1965, Chinese scientists completed the synthesis of bovine crystalline insulin, which was the first artificial synthetic peptides bioactive substance in the world. The first protein with biological activity was artificially synthesized, which broke through the boundary between the field of general organic compounds and the field of biopolymers with concentrated information, and took an important step in the long process of human understanding of life phenomena.
4. Compound artemether: Compound artemether is the first drug with a brand-new chemical structure discovered in China, and it is also an original drug in China that has been widely recognized internationally. By the end of 25, it has been designated as the first-line drug for malaria treatment by 26 Asian and African countries, which is a milestone in the history of malaria treatment. Compound artemether is still the only patented drug in China that is widely recognized and sold in the world, and the only drug in China that really goes to the world.