1. Estrogenic Activity in Water and Sediments of a French River: Contribution of Alkylphenols

   • H. Fenet
   • E. Gomez
   • P. Balaguer

   Pages: 0001 - 0006

2. Reduced Antimicrobial Potencies of Oxytetracycline, Tylosin, Sulfadiazin, Streptomycin, Ciprofloxacin, and Olaquindox Due to Environmental Processes

   • B. Halling-Sørensen
   • G. Sengeløv
   • L. B. Jensen

   Pages: 0007 - 0016

3. Variability in Zinc Tolerance, Measured as Incorporation of Radio-Labeled Carbon Dioxide and Thymidine, in Periphyton Communities Sampled from 15 European River Stretches

   • H. Blanck
   • W. Admiraal
   • G. M. J. Tubbing

   Pages: 0017 - 0029

4. Bioavailability and Trophic Transfer of Sediment-Bound Ni and U in a Southeastern Wetland System

   • T. Punshon
   • K. F. Gaines
   • R. A. Jenkins, Jr.

   Pages: 0030 - 0035

5. Metals in Horseshoe Crabs from Delaware Bay

   • J. Burger
   • C. Dixon
   • M. Gochfeld

   Pages: 0036 - 0042

6. Assessment of Seasonal Variability of Cytochemical Responses to Contaminant Exposure in the Blue Mussel Mytilus edulis (Complex)

   • A. N. Kagley
   • R. G. Snider
   • E. Casillas

   Pages: 0043 - 0052

7. Variation of Metal and Metallothionein Concentrations in a Natural Population of Ruditapes decussatus

   • M. J. Bebianno
   • M. A. Serafim

   Pages: 0053 - 0066

8. Aqueous-Phase Disappearance of Atrazine, Metolachlor, and Chlorpyrifos in Laboratory Aquaria and Outdoor Macrocosms

   • L. Mazanti
   • C. Rice
   • J. Rheinstein

   Pages: 0067 - 0076

9. Nonylphenol and Nonylphenol Ethoxylates in Fish, Sediment, and Water from the Kalamazoo River, Michigan

   • K. Kannan
   • T. L. Keith
   • J. P. Giesy

   Pages: 0077 - 0082

10. The Effect of Humic Acid on the Uptake of Mercury(II), Cadmium(II), and Zinc(II) by Chinook Salmon (Oncorhynchus tshawytscha) Eggs

    • D. Hammock
    • C. C. Huang
    • J. H. Swinehart

    Pages: 0083 - 0088

11. Great Tit (Parus major) Nestlings as Biomonitors of Organochlorine Pollution

    • T. Dauwe
    • S.G. Chu
    • M. Eens

    Pages: 0089 - 0096

12. The Influence of Diet Properties and Feeding Rates on PCB Toxicokinetics in the Ring Dove

    • K. G. Drouillard
    • R. J. Norstrom

    Pages: 0097 - 0106

13. Lead Speciation in Artificial Human Digestive Fluid

    • A. G. Oomen
    • J. Tolls
    • M. A. G. T. Van den Hoop

    Pages: 0107 - 0115

14. In Vitro Intestinal Lead Uptake and Transport in Relation to Speciation

    • A. G. Oomen
    • J. Tolls
    • J. P. Groten

    Pages: 0116 - 0124

15. Human Exposure to Polychlorinated Biphenyls in a Residential Community

    • K. G. Orloff
    • S. Dearwent
    • W. Turner

    Pages: 0125 - 0131

16. Assessment of PCB Congener Analytical Methods: Do They Meet Risk Assessment Needs?

    • N. L. Judd
    • W. C. Griffith
    • E. M. Faustman

    Pages: 0132 - 0139