1. Sorption-desorption characteristics of methyl parathion by clays

   • F. M. Kishk
   • T. M. Abu-Sharar
   • M. B. Abou-Donia

   OriginalPaper Pages: 637 - 645

2. Accelerated parathion degradation in soil inoculated with acclimated bacteria under field conditions

   • Robert W. Barles
   • Christian G. Daughton
   • Dennis P. H. Hsieh

   OriginalPaper Pages: 647 - 660

3. Isolation of an enzyme from soil that degrades the organophosphorus insecticide, crotoxyphos

   • L. W. Getzin
   • T. Satyanarayana

   OriginalPaper Pages: 661 - 672

4. Influence of time and mode of exposure on biotransformation of naphthalene by Juvenile starry flounder (Platichthys stellatus) and rock sole (Lepidopsetta bilineata)

   • Usha Varanasi
   • Dennis J. Gmur
   • Patrick A. Treseler

   OriginalPaper Pages: 673 - 692

5. Contaminant levels in animal feeds used for toxicity studies

   • W. Emile Coleman
   • Robert G. Tardiff

   OriginalPaper Pages: 693 - 702

6. Cholinesterase surveillance of aerial applicators and allied workers in the Democratic Republic of the Sudan

   • L. Ullmann
   • J. Phillips
   • K. Sachsse

   OriginalPaper Pages: 703 - 712

7. Sorption and desorption of atrazine by three bacterial species isolated from aquatic systems

   • Annette Geller

   OriginalPaper Pages: 713 - 720

8. Experiments on the accumulation of lindane (γ-BHC) by the primary producersChlorella spec. andChlorella pyrenoidosa

   • Peter -Diedrich Hansen

   OriginalPaper Pages: 721 - 731

9. Changes in mercury levels in harbor porpoises from the Bay of Fundy, Canada, and adjacent waters during 1969–1977

   • D. E. Gaskin
   • K. I. Stonefield
   • R. Frank

   OriginalPaper Pages: 733 - 762

10. Erratum

    Erratum Pages: 771 - 771