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KMID : 0903519870300020126
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Journal of the Korean Society of Agricultural Chemistry and Biotechnology
1987 Volume.30 No. 2 p.126 ~ p.132
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Sterilization and Quality Changes of Laboratory Rodent Diet by Different Treatments
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양재승/Yang, Jae Seung
조한옥/권중호/변명우/Cho, Han Ok/Kwon, Joong Ho/Byun, Myung Woo
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Abstract
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The usual sterilization methods such as fumigation and autoclaving of laboratory rodent diet was compared with a new irradiation treatment in the point of sterilization effect and physico-chemical quality. Under the treatments of 10∼20 kGy r-irradiation and autoclaving at 121℃ for 20 min, total microorganisms were eliminated but ethylene oxide fumigation was insufficient to destory them. Total amino acid content was reduced about 5% in 20 kGy radiation treatment compared with control, while in the ethylene oxide fumigation and the autoclaving, the reducing rate was markedly great as 15% and 20%, respectively. Total sugar and mineral contents were not significantly different among treatment among treatment groups. TBA values were increased in all treatments. The pH of irradiated group was stable in comparison with that of ethylene oxide. In the treatments of ethylene oxide and especially autoclaving, overall appearance was decreased to a great extent as a result of decreasing lightness and increasing redness.
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