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Process Study on Sterilization and Preservation of Frozen Crawfish by Irradiation

DING Zeng-cheng et al(Institute of Agricultural Application of Atomic Energy,Anhui Academy of Agricultural Sciences,Hefei,Anhui 230088)  
The export of frozen crawfish accounts for major part within that of aquatic product in our country.As a result of processing at a high temperature,microorganism is difficult in keeping with European and America standard.The writers processed frozen crawfish adopting the new technology of low-dose and insulating irradiation by γ-rays.The result indicated that the sum of bacterium can be controlled under 10?000 No./g if effective dose was in excess of 1.5?kGy.Irradiation had no evident effect on protein and prolongs the length for preservation by doses lower than 10 kGy.All the sterilization process was studied under insulating condition.The dose uniformity ratio was controlled lower than 2.The treated product kept its original color and shape and did not melt.
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