... Mamoru Koketsu2, Masahiko Kato1, Masahiko Kurabayashi3,Atsuyoshi Nishina4and Hirokazu Kimura51 Gunma Prefectural Institute of Public Health and Environmental Sciences, Maebashi, Japan2 ... Ishiyama M, Tominaga H, Shiga M, Sasamoto K,Ohkura Y & Ueno K (1996) A combined assay of cell viability and in vitro cytotoxicity with a highly water-soluble tetrazolium salt, neutral red and ... Hepes was incubated with orwithout organic selenium compound for 5 min at 37 °Cin35 mm glass-bottomed dishes (Matsunami, Osaka, Japan).After incubation, PMA was added to a final concentrationof...