1. Nuclear spin Magnetic resonance diagram Nuclear magnetic resonance is mainly caused by the spin motion of atomic nuclei. For different nucleuses, the spin motion is different. They can be represented by the nuclear spin quantum number I. There is a certain relationship between the s
The United States Senate failed to pass the US$14 billion plan to save the American auto industry, which drove the Detroit auto industry’s Big Three to increase its chances of bankruptcy, affecting global auto demand and supply of auto parts, dragging down Eurasian auto stocks, auto p
In order to ensure the normal operation of the engine, the pressure of the oil pump and the oil pressure of the main oil passage must be appropriate. When the engine speed increases or the oil becomes rich, the oil pressure will increase, causing too much oil splashed on the cylinder wall. The oil
According to data released by the National Energy Administration a few days ago, from January to May, the total electricity consumption of the whole society was 1961.8 billion kWh, a year-on-year increase of 5.8%. Lu Junling, deputy inspector of the National Development and Reform Commissi
Evonik of Germany and Sibur of Russia signed an agreement in late March to conduct a feasibility study on the construction of a propylene oxide (PO) plant in Russia. SBB Holdings will use the new HPPO process to build PO units that use hydrogen peroxide (H2O2) and propylene to produce propylene oxi
After a few months of hardship, the car owners finally waited for the good news of the decline in domestic refined oil prices. On the evening of December 18, the National Development and Reform Commission announced the fuel tax reform plan and lowered the prices of refined oil products. Experts s
Beijing's car ownership will enter 5 million vehicles. As the number of car ownership increases, the number of used tires will increase accordingly. A car is counted on 4 tires. Beijing renews tires every four years. The total volume is 20 million, and the average annual replacement is a
The vigorous development of the mold market, mold companies and product competition is also increasingly fierce, on the one hand to promote the mold industry to accelerate convergence with the domestic and foreign markets, on the other hand due to the non-standard market order, but also brou
First, China is a developing country. The instrumentation industry has a gap of 10-15 years compared with developed countries. However, in the developing countries, China is the largest and most complete and most powerful country in the instrumentation industry. Second, China’s dem
Recently, Xiangfan Kanghao Electromechanical Co., Ltd. and Cummins China Co., Ltd. signed a joint venture agreement and the two parties reached a 50:50 joint venture partnership. Mr. Cao Side, vice president of the Cummins Group, and Mr. Li Zuoyuan, chairman of Kang Hao Electrical and Mechanical C
Xinhua Online Channel Wang Hongming reported on March 31 that the third session of the 2008 Shanghai International Starch and Starch Group was approved by the Ministry of Science and Technology of the People's Republic of China and hosted by the China Starch Industry Association and the Shangh