CONTENTS 
Foreword.iii 
Preface.iv 
Abstract.vi 
Figures.xi 
Tables.xii 
Acknowledgement . xiv 
1. Introduction . 1 
Evaluation of biotoxicity . 1 
Phthalate esters and related chemicals . 1 
Microbial transformation of tin . 2 
2. Conclusions . :.'. 5 
Evaluation of biotoxicity . 5 
Phthalate esters and related chemicals . 5 
Microbial transformation of tin . 6 
3. Recommendations. 8 
Evaluation of biotoxicity . 8 
Phthalate esters and related chemicals . 8 
Microbial transformation of tin . 9 
4. Evaluation of Chester River Oyster Mortality 
Biotoxicity.10 
Methods and Materials . 10 
Procedures.17 
Results.24 
Discussion.36 
IX 
