Vol.9 No.5 July, 1998
Contents
Preface
Communication System for Environmental Risk Management----Kazuhiro Ueta 355

Special Issues: Bioassay
Ecotoxicity Evaluation and Bioassay of Chemicals----Isao Aoyama 358 abst
Ecological Assessment by Aquatic Microcosm System----Yuhei Inamori, Yoshie Takamatsu and Ryuichi Sudo 368 abst
The In vitro Bioassay System as it Closely Correlate with Toxicity Levels in the Body----Kazuhiro Ichikawa Young-Son Chung and Hideo Utsumi 379 abst
Assessment of Hazardous Wastes Using Acute Toxicity Tests----Masaaki Hosomi and Hidehiro Kaneko 384 abst
Safety Assessment of Landfill by Mutagenicity Test----Masataka Hanashima and Ayako Tachifuji 394 abst