1. ; Department of Chemistry; Dalhousie University; Halifax N.S. B3H 4J3 Canada
2. Bureau of Nutritional Sciences, Food Directorate; Health and Welfare Canada; Sir Frederick Banting Building, Tunney's Pasture Ottawa Ontario K1A 0L2 Canada
3. ; Canadian Institute of Fisheries Technology; Technical University of Nova Scotia; Halifax N.S. B3J 2X4 Canada