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首页> 外文期刊>Environmental Science & Technology >Metal Transfer among Organs Following Short- and Long-Term Exposures Using Autoradiography: Cadmium Bioaccumulation by the Freshwater Prawn Macrobrachium australiense
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Metal Transfer among Organs Following Short- and Long-Term Exposures Using Autoradiography: Cadmium Bioaccumulation by the Freshwater Prawn Macrobrachium australiense

机译：使用放射自显影技术进行短期和长期暴露后器官之间的金属转移：淡水虾对虾的镉生物富集

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摘要

The uptake, depuration, and organ distribution of the radioisotope ~(109)Cd were used to explore the internal kinetics of this nonessential metal following accumulation from waterborne cadmium by the freshwater decapod crustacean Macrobrachium australiense. Short- (6 h) and long-term (7 to 14 days) exposures to the radioisotope in solutions of 0.56 µg Cd/L were followed by depuration in metal- and isotope-free water for up to 21 days. The anatomical distribution of the radionuclide was visualized using autoradiography at predefined time points. The gills did not become saturated with cadmium after 14 days of exposure and demonstrated a greater rate of cadmium uptake relative to the hepatopancreas. Cadmium concentrations decreased rapidly during depuration from both gills and hepatopancreas after short exposures but slowly following long-term exposures. This suggests that the duration of cadmium exposure influences the depuration rate for this organism. The study demonstrates the complex behavior of cadmium accumulated by M. australiense and improves our understanding of how exposure duration will influence the internal location and potential toxicity of metals.
机译：放射性同位素〜（109）Cd的吸收，净化和器官分布用于研究淡水十足纲甲壳动物Macrobrachium australiense从水性镉积累后该非必需金属的内部动力学。在0.56 µg Cd / L的溶液中短期（6小时）和长期（7至14天）暴露于放射性同位素，然后在无金属和无同位素的水中净化长达21天。使用放射自显影在预定的时间点可以看到放射性核素的解剖分布。暴露14天后，g未充满镉，并且相对于肝胰腺，镉的吸收率更高。短时间暴露后，从from和肝胰腺净化时，镉浓度迅速降低，但长期暴露后，镉浓度缓慢降低。这表明镉暴露的持续时间会影响该生物的净化速率。这项研究证明了澳大利亚芒硝霉积累的镉的复杂行为，并增进了我们对暴露持续时间将如何影响金属内部位置和潜在毒性的理解。

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  • 来源
    《Environmental Science & Technology》 |2017年第7期|4054-4060|共7页
  • 作者

    Tom Cresswell; Debashish Mazumder; Paul D. Callaghan; An Nguyen; Michael Corry; Stuart L. Simpson;

  • 作者单位

    Australian Nuclear Science and Technology Organisation, Locked Bag 2001, Kirrawee DC, Sydney, New South Wales 2232, Australia;

    Australian Nuclear Science and Technology Organisation, Locked Bag 2001, Kirrawee DC, Sydney, New South Wales 2232, Australia;

    Australian Nuclear Science and Technology Organisation, Locked Bag 2001, Kirrawee DC, Sydney, New South Wales 2232, Australia;

    Australian Nuclear Science and Technology Organisation, Locked Bag 2001, Kirrawee DC, Sydney, New South Wales 2232, Australia;

    Australian Nuclear Science and Technology Organisation, Locked Bag 2001, Kirrawee DC, Sydney, New South Wales 2232, Australia;

    CSIRO Land and Water, Centre for Environmental Contaminants Research, Sydney, New South Wales 2232, Australia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 正文语种 eng
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