| 摘要 |
The feed-stuff was sterilized by gamma-rays radiation. Thus, a commercial, powdered or granular feed-stuff was packed into a polyethylene film bag of 0.3-1.0 mm thickness, sealed, and applied to gamma-rays of cobalt 60 at the dose of 0.5-3 Mrad. 100% sterilization effect was observed in E. coli at the dose of 0.5 Mrad.
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