CHAPTER 4 



RELATIVE BIOAVAILABILITY OF TWO ORGANIC AND TWO INORGANIC 



ZINC SOURCES FED TO SHEEP 3 4 



Introduction 34 



Materials and Methods 3 5 



Results 37 



Discussion 41 



Implications 46 



Summary and Conclusions 46 



CHAPTER 5 



DEVELOPMENT OF ACUTE COPPER POISONING IN SHEEP FED ORGANIC 



OR INORGANIC COPPER 48 



Introduction 48 



Materials and Methods 50 



Results 51 



Discussion 59 



Implications 61 



Summary and Conclusions 61 



CHAPTER 6 



INTERACTION OF DIFFERENT ORGANIC AND INORGANIC ZINC AND 



COPPER SOURCES FED TO RATS 63 



Introduction 63 



Materials and Methods 64 



Results 66 



Discussion 74 



Implications 77 



Summary and Conclusions 77 



CHAPTER 7 



GENERAL SUMMARY AND CONCLUSIONS 7 9 



APPENDIX 84 



REFERENCE LIST 86 



BIOGRAPHICAL SKETCH 9 8 



VI 



