Tohru Katoh
Kao Corporation
Ecotoxicology and Environmental Safety | 1994
Yasuhiko Toshima; Tohru Katoh; Naohiro Nishiyama; Takashi Tsugukuni; Fukiko Saito
Biodegradability of N-(3-alkanoylaminopropyl)-N-(2-alkanoyloxyethyl)-N- methylammonium chloride (EAA) was investigated. Biodegradabilities by biochemical oxygen demand (BOD) and dissolved organic carbon (DOC) after 28 days were 79 and 91%, respectively, and almost the same amount of ammonium ion as the theoretical value was detected using a modified MITI test (I) (OECD guidelines, 301C). In the test with activated sludge obtained from a municipal sewage treatment plant, biodegradabilities by BOD and DOC after 35 days were 87 and 98%, respectively, and the 1H-NMR analysis of the tested solution which was done separately under similar conditions indicated the rise and fall of two biodegradation intermediates. Therefore, EEA was considered to be a readily and ultimately biodegradable compound. Besides, the 96-hr LC50 value in red killifish (Oryzias latipes) of EAA was 66 mg/liter. More than 1000 mg/liter was of biodegradation intermediates rapidly made by biodegradation of EAA. These results reveal that EAA has sufficient environmental compatibility.
Archive | 1995
Keiko Hasebe; Yuichi Hioki; Osamu Tachizawa; Takeshi Tomifuji; Tohru Katoh; Uichiro Nishimoto; Yoshifumi Nishimoto; Kohshiro Sotoya
Archive | 1994
Yushi Sakata; Junichi Inokoshi; Tohru Katoh; Osamu Tachizawa; Uichiro Nishimoto; Yasuki Ohtawa; Masaaki Yamamura
Archive | 1994
Yushi Sakata; Junichi Inokoshi; Tohru Katoh; Osamu Tachizawa; Uichiro Nishimoto; Yasuki Ohtawa; Masaaki Yamamura
Archive | 2000
Yasuki Ohtawa; Tohru Katoh; Takeshi Tomifuji
Archive | 1994
Yuichi Hioki; Keiko Hasebe; Tadayuki Suzuki; Osamu Tachizawa; Takeshi Tomifuji; Tohru Katoh; Kohshiro Sotoya; Keiichiro Tomioka; Uichiro Nishimoto; Yoshifumi Nishimoto; Yasuki Ohtawa
Archive | 1996
Osamu Tachizawa; Akira Sakaguchi; Tohru Katoh; Kohshiro Sotoya; Noriko Yamaguchi; Junichi Inokoshi; Muneo Aoyagi
Archive | 1995
Yuushi Sakata; Junichi Inokoshi; Osamu Tachizawa; Tohru Katoh; Uichirou Nishimoto; Yasuki Ohtawa; Akira Sakaguchi; Kohshiroh Sotoya; Noriko Yamaguchi
Archive | 1994
Nirohiro Hayashi; Kanji Yoshimura; Tohru Katoh; Kuniyasu Kawabe
Archive | 1993
Osamu Tachizawa; Takeshi Tomifuji; Tohru Katoh; Uichiro Nishimoto; Yoshifumi Nishimoto; Kohshiro Sotoya; Keiko Hasebe; Yuichi Hioki
