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    • Die opname, verspreiding en invloed van koper by Xenopus laevis (Daudin) 

      Vorster, Sonja (North-West University (South Africa), 1997)
      (1) Adult female Xenopus laevis were subjected to copper concentrations ranging from 25 to 1 250 µ,g mf1 for a period of 96 hours to ascertain their sensitivity towards the heavy metal. A more confined range was selected ...