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RISS 인기검색어
- 검색키워드
- 저자 : 조성구 ( Jong Wook Kim (검색결과 1 건)
- 무료
- 기관 내 무료
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김종욱,조성구 ( Jong Wook Kim,Seong Koo Cho ) 한국축산학회 1981 한국축산학회지 Vol.23 No.6
In order to study the keeping quality of the market milk sold in Cheongju area, 8 samples from different plants were investigated into their biological and physiochemical properties during a period of 6 days in refrigeration. The results obtained are as follows: 1. The number of live bacteria per milliliter of the market milk until the 5th day of refrigeration were below the regulation number, 40,000. 2. The number of coliform group bacteria per milliliter until the 4th day of refrigeration were below the regulation number, 10. 3. The number of psychrophilic bacteria per milliliter were increased in accordance with the lapse of time in 5 samples, but there was no definite tendency in 3 samples. 4. Until the 4th day of refrigeration, 6 samples showed negative results in the alcohol test, but 2 samples showed no definite tendency. 5. Until the 2nd day of refrigeration, all samples showed negative results in the boiling test, but a small number of samples showed negative results after the 3rd day. 6. The titratable acidity of 7 samples were above the regulation value, 0.18% but only one sample showed below the regulation value. 7. The specific gravity were 1.028 - 1.033, within the regulation value. Although the bacteriological quality of the market milk examined were suitable for consumption until the 4th day of refrigeration, the low quality of physico-chemical properties suggests the necessity of quality improvement.
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