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KMID : 0380619880200010112
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Korean Journal of Food Science and Technology
1988 Volume.20 No. 1 p.112 ~ p.118
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Effects of Gamma Irradiation on the Decontamination of Animal Feeds
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조한옥/Cho, Han Ok
권중호/변명우/차보숙/김영애/Kwon, Joong Ho/Byun, Myung Woo/Cha, Bo Sook/Kim, Young Bae
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Abstract
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The effect of gamma irradiation of microbiological and physicochemical properties of raw ingredients (thirteen kinds of protein sources) for the mixed feed were investigated. The total aerobic bacteria counts in the samples was ranged from 10² to 10^7 cells/g. After 5 to 7 kGy irradiation, the total count was reduced by 3 to 4 log cycles. Coliforms were detected in seven samples and the range was from 10⁴ to 10^6 cells/g. Enteric pathogens were found only in fish meal and poultry byproduct as lOzto 103 cells/g. They were sensitive to radiation and completely sterilized by 3 to 5 kGy irradiation. Total fungi count was ranged from 10¹ to 10⁴ cells/g in all samples, They were osmophiles such as Aspergillus, Penicillium, Cladosporium, Aureobasidium and Rhizopus and were destroyed by 3 to 7 kGy irradiation. Five species of potential mycotoxin producers including Aspergillus flavus were also identified. Physicochemical properties, such as total amino acid content, TBA value, POV and color difference showed that irradiation with optimum does was less detrimental than autoclaving.
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