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Using 203HgCl2 as a tracer, uptake and combination of inorganic mercury in Tilapia mossambica (petres) and its transfer between different tissues of the fish were studied. The results demonstrate that gill is the main tissue uptaking mercury directly from seawater and that the mercury in gill, skin, digestive tube and fin would be transferred to the other tissues. The result of gel chromatography with Sephadex G-75 shows that most of mercury in gill filaments, liver, and digestive tube are bound in high molecules (MW-70000) and not in metallothionein, but in kidney and bile mercury binding proteins are similar to metallothionein and are accounted for up to 60% and 46% respectively. 相似文献
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~(60)Co、~(59)Fe和~(65)Zn都是诱发放射性核素,它们在核爆炸散落物中,在核工程设施和核动力舰船排出的废物中,都是主要放射性核素的一部分,海洋生物对它们的浓缩能力很强。因此,近年来在环境监测中,特别是在港湾和近海区域中尤其受到重视。分离测定环境样品中~(60)Co、~(59)Fe和~(65)Zn的放射化学方法,报导较多的是就单一核素进行分离测定,或者与其它放射性核素一起进行系统分析。前者一个样品只能测定一种核素,既费时,也不经济,后者则操作沉繁,回收率一般也比较低。我们 相似文献
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不少学者对Zn和~(65)Zn任海洋生物中的累积、排泄和组织分布方面进行了大量的研究,但对共累积和排泄的机制并不清楚。近年来,国外在达方面有了些报道,如Gcorge等,运用电子显微镜和x-射线扫描分析方 相似文献
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