Cephalosporin antibiotics can be said to be a household name, it contains a large class of antibiotics, including the first generation, the second generation, the third generation and the fourth generation. Trade names include rochefen, junbizhi, roseqin and so on. Some customers need to observe the characteristics of cefixime crystal under polarizing microscope.

Micronucleus (MCN) is a kind of abnormal structure in eukaryotic cells, and it is a form of chromosome aberration in interphase cells. Micronucleus is often produced by various physical and chemical factors, such as radiation and chemicals. Micronucleus test is used in radiation damage, radiation protection, chemical mutagen, new drug test, food additive evaluation, chromosome genetic disease and precancerous diagnosis.