antibacterial activities
A series of tubes with average liquid that contains variable and well-know concentrations of the chitooligosaccharide and its derivative were prepared. Thereafter, each tube was inoculate with the microorganism and incubated at 37 C for 18 h. The presence or absence of the development of microorganism indicates the bacterial sensitivity to the compound tested. The lowest concentration that completely inhibits the bacterial growth was assigned as MIC.