Small particles and big hazards-the importance of car cleanlinessThe earliest history of cleanliness is used in the aerospace industry. In the early 1960s, the American Automotive Engineers (SAE) and the American Association of Aeronautics and Astronautics (SAE) began to use uniform cleanliness stan
Interpretation of the working principle of Dr. J Scientific scanning electron microscope.The electron microscope is a relatively modern cell biology research tool invented in 1965. It mainly uses secondary electron signal imaging to observe the surface morphology of the sample, that is, scan the sam
1. The collected signals are different. SE: secondary electron; BSE: backscattered electron.2. The resolution is different. SE: high; BSE: low.3. The image contrast is different. SE: Topographic contrast; BSE: Thickness contrast.4. The purpose of application is different. SE: onlookers three-dimensi