1. the Dept. of Pathobiology and Quality Control; Artemia and Aquaculture Research Inst.; Urmia Univ.; Urmia West Azerbaijan 57561-51818 Iran
2. Dept. of Food Science; Cornell Univ.; Ithaca N.Y. 14853-7201 U.S.A
3. Dept. of Food Science and Technology, Faculty of Agriculture; Tarbiat Modares Univ.; Tehran 14115-336 Iran