首页> 外文会议>International Conference of the European Aquaculture Society >TOXIC AND NON-TOXIC ARSENIC IN FISH: SPECIATION RELEVANCE, ANALYTICAL METHODOLOGY AND APPLICATION
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TOXIC AND NON-TOXIC ARSENIC IN FISH: SPECIATION RELEVANCE, ANALYTICAL METHODOLOGY AND APPLICATION

机译:鱼类中有毒和无毒砷:形态相关性,分析方法和应用

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Arsenic compounds in marine organisms and seaweed are found in concentrations from 1 to 100 mg kg~(-1), consequence of bioaccumulation and bio-transformation processes (Leonard, 1991). Seafood products are the most significant source of arsenic in thehuman diet (Penrose, 1974). Because of the wide-ranging levels of toxiciry exhibited by different arsenic species, knowledge of the actual forms present rather than total arsenic is required in order to assess dietary risk (Merian, 1999). Inorganic forms (As(III) and As(V)) exhibit high toxiciry (Tolgyessy, 1993), but their methylated metabolites MMA (monomethylarsonic acid) and DMA (dimethylarsinic acid) are less toxic. Organoarsenicals such as AsB (arsenobetaine) and AsC (arsenocholine) are even tolerated by living organisms, arsenobetaine is not metabolised by humans and is believed to have low or negligible toxiciry (Morita et al., 1981). The major arsenicals in seafood are AsB and AsC (Francesconi and Kuehnelt, 2002; Villa-Lojo et al, 2001). AsChas been suggested as a precursor of arsenobetaine, which is the end product of marine arsenic metabolism (Bernhard et al., 1986).
机译:海洋生物和海藻中的砷化合物在浓度为1至100mg kg〜(-1),生物累积和生物转化过程的后果(Leonard,1991)。海鲜产品是寒武纪饮食中最重要的砷来源(Penrose,1974年)。由于不同砷物种展出的毒性水平宽,所以需要了解实际形式的知识而不是总砷,以评估饮食风险(Merian,1999)。无机形式(如(iii)和(v))表现出高毒型(托尔吉斯,1993),但它们的甲基化代谢物MMA(单甲基胂酸)和DMA(二甲基胂酸)毒性较小。甚至通过生物体耐受的有机躯如ASB(arsenobetaine)和ASC(arsenocholine),人类不受人类代谢的砷遗传蛋白,并且被认为具有低或可忽略不计的毒性(Morita等,1981)。海鲜的主要砷是ASB和ASC(Francesconi和Kuehnelt,2002; Villa-Lojo等,2001)。 Aschas被建议作为砷替尼的前体,这是海洋砷代谢的最终产物(Bernhard等,1986)。

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