水生動物における除草剤PCPの代謝に関する研究-II : アサリの解毒機構による水中PCPの生化学的変化

概要

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In a previous works1), it was found that the concentration of PCP in sea water was sharply decreased during the culture of Tapes philippinarum. The amount accumulated in the shellfish, however, was fairly smaller than the decreased amount of PCP in the medium, and the PCP content in the shell-fish decreased with the lapse of culture time2). The present paper deals with a study, using 14C-labelled PCP, on the biochemical change of PCP in the medium during the culture of Tapes philippinarum. It was elucidated that the decrease of PCP in the medium did not mean its decomposition, but its transformation to some bound-form by the detoxication mechanism of the shell-fish. It was also confirmed that the excreta of shell-fish and micro-organisms in the medium played no role in the formation of the bound PCP. Although the bound PCP was not extracted with xylene from the acidified aqueous solution (0.02 N HCl) by the standard method for PCP determination5), it was, however, determined as free PCP from the distillate of the steam-distillation of the acidified sample (0.6 N HCI).