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药材甲与烟草甲羧酸酯酶和磷酸酯酶毒理学特性比较

, PP. 78-82

Keywords: 药材甲,烟草甲,羧酸酯酶,磷酸酯酶,毒理学性质

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Abstract:

为了解药材甲、烟草甲在某些关键解毒酶毒理学方面的差异,采用终点比色法对其羧酸酯酶和磷酸酯酶的酶活力及酶促动力学参数进行了测定。结果显示:药材甲和烟草甲羧酸酯酶作用底物α-乙酸萘酯的比活力分别为0.28和0.21mol.min-1.mg-1pro.;酸性磷酸酯酶作用底物对硝基苯基磷酸二钠的比活力分别为1.16和1.13mol.min-1.mg-1pro.;碱性磷酸酯酶作用底物对硝基苯基磷酸二钠的比活力分别为0.31和0.36mol.min-1.mg-1pro.。此外,药材甲和烟草甲除酸性磷酸酯酶酶活力无显著差异外,羧酸酯酶、碱性磷酸酯酶活力和动力学参数均差异显著。表明2种昆虫对外源性胁迫具有不同的解毒能力。

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