In order to explore the possibility of inhalation of formaldehyde on mouse bone marrow cells have an impact on cell cycle and use SPF level purely Kunming male mice for the study, with a concentration of 0.5 mg /m(3), 1.0 mg/m(3) and 3.0 mg/m(3) of gaseous Formaldehyde dynamics in mice exposed to continuous 72 hours after the exposure using flow cytometry analysis cells from mouse bone marrow cells, cell cycle changes. The results showed that: exposure group and control group the cell cycle there is an obvious difference between the data. These results suggest that: In the concentration range ...