the induction of cytogenetic effects by inhalation of ethylene oxide was tested in bone marrow cells and primary spermatocytes at diakinesis-metaphase i cells from mouse after a single treatment ( 6 h/1 day ) at 0 , 200 , 400 and 600 ppm , and multiple treatment ( 6 h/5 days/2 weeks ) at 0 , 200 and 400 ppm .
C0025564
metaphase
C0007634
cells