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首页> 外文期刊>Journal of Environmental & Analytical Toxicology >Estimation of Toxicity and Genotoxicity of Water, Bottom Sediments and Submerged Macrophyte Elodea canadensis of the Yenisei River in the Presence or Absence of Americium-241
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Estimation of Toxicity and Genotoxicity of Water, Bottom Sediments and Submerged Macrophyte Elodea canadensis of the Yenisei River in the Presence or Absence of Americium-241

机译：在存在或不存在A241的情况下，叶尼塞河水，底部沉积物和沉水植物加拿大伊乐藻的毒性和遗传毒性估算

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摘要

Toxicity and genotoxicity of one of the most widely spread species of aqueous plants of the Yenisei River – Elodea canadensis and bottom sediments of the Yenisei River containing 241Am have been evaluated for the first time. It is shown that the suspensions and extracts of plants or bottom sediments which do not contain 241Am, inherently decrease the survival of bacterial cells of specific strains as compared to the control samples. Cell death of E. coli in the aqueous plants accumulating 241Am was observed to be even higher, which is consistent with the toxicity of the control samples of aqueous solutions of 241Am salts. Non-radioactive suspensions of the control samples of the plants and bottom sediments also slightly influenced the survival of the S. typhimurium TA98 cells, whereas their survival abruptly decreased in the presence of 241Am. The samples of the bottom sediments without 241Am hardly influenced the «frequency of His reversions» of the indicator S. typhimurium. In the suspensions of the 241Am-containing bottom sediments a dose-dependent effect was observed both in the «frequency of reversions» and in the quantity of the detected His revertants in the S. typhimurium TA98 strain.
机译：首次评估了叶尼塞河水生植物中分布最广的一种植物的毒性和遗传毒性-加拿大伊乐藻和含有241Am的叶尼塞河底部沉积物。结果表明，与对照样品相比，不含241Am的植物或底部沉积物的悬浮液和提取物固有地降低了特定菌株的细菌细胞的存活率。观察到在积累了241Am的水生植物中大肠杆菌的细胞死亡甚至更高，这与241Am盐水溶液的对照样品的毒性一致。植物对照样品和底部沉积物的非放射性悬浮液也轻微影响鼠伤寒沙门氏菌TA98细胞的存活，而在241Am的存在下其存活突然下降。没有241Am的底部沉积物样品几乎不会影响指标鼠伤寒沙门氏菌的“ His回复频率”。在含有241Am的底部沉积物的悬浮液中，在“回复频率”和鼠伤寒沙门氏菌TA98菌株中检测到的His回复体的数量中均观察到剂量依赖性效应。

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