Food Science of Animal Resources (한국축산식품학회지)

Korean Society for Food Science of Animal Resources (한국축산식품학회)
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Quality Changes during Storage of Spreadable Liver Product

Spreadable 간 제품의 저장온도별 품질변화

  • Published : 2008.03.30
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Abstract

In order to expand the use of hog liver by the food industry, spreadable liver product was manufactured and quality changes were investigated depending on storage temperature at $-2^{\circ}C,\;5^{\circ}C\;and\;20^{\circ}C$ for 30 days. pH, thiobarbituric acid (TBA), volatile basic nitrogen (VBN), color, microbiological and sensory evaluation were carried out. Changes in pH values were not significantly different at different storage temperatures. TBA values were 0.6 mg MA/kg at $-2^{\circ}C$ after 30 days, 0.80 mg MA/kg at $5^{\circ}C$ after 21 days and showed 0.91 mg MA/kg at $20^{\circ}C$ after 14 days. The change in VBN content tended to increase during prolonged storage periods regardless of storage temperature. The product color tended to lighten over time, although there was no difference in a value of color during storage periods. Also, sensory evaluation results showed that the optimal storage temperature for the liver product was $5^{\circ}C$. The numbers of general bacteria increased to a level of 7.38 log CFU/g on storage 7 days in $20^{\circ}C$. This study showed that a viable spreadable liver product could be manufactured using hog liver and remains edible for at least 14 days when stored at temperatures below $5^{\circ}C$.

돼지 도축부산물의 하나인 돼지 간의 활용도 증진을 위하여 퍼짐형 간 제품을 제조하여 저장온도별 품질변화를 알아보고자 본 실험을 실시하였다. 저장시험은 $-2^{\circ}C,\;5^{\circ}C$ 및 $20^{\circ}C$에서 30일간 저장하면서 pH, TBA, VBN, 색도, 일반세균, 대장균군 및 관능검사를 분석하였다 pH는 저장온도별에 따른 유의적 차이를 보이지 않았으며, TBA는 $-2^{\circ}C$ 저장구에서 30일째에 0.6 MA mg/kg의 값을 보이고, $5^{\circ}C$ 저장구에서는 21일째 0.80 MA mg/kg 이상을 나타냈으며, $20^{\circ}C$저장구는 14일째 0.91 MA mg/kg를 보였다. VBN함량의 변화는 저장기간이 길어짐에 따라 계속적인 증가 경향을 보였으나 그 중 $20^{\circ}C$ 저장구가 10일째 가식권을 벗어났다. 색깔변화는 각 저장구간 전체적으로 명도가 증가하는 경향을 보였으며 적색도는 감소하였다. 관능검사 결과 저장온도별에 따라 유의적 차이는 있었지만 퍼짐성은 높은 온도에서 좋은 결과를 보였다. 일반세균수 및 대장균군의 변화는 $-2^{\circ}C$저장구에서는 저장기간이 경과함에 따라 크게 세균 증식이 일어나지 않아 저장 30일째에도 3.31 log CFU/g의 수준을 보였다. $5^{\circ}C$ 저장구 30일까지 저장 후에도 3.56 log CFU/g 정도였다. 반면 $20^{\circ}C$ 저장구에서는 저장 14일에 8.74 log CFU/g까지 증식하였다. 대장균군에서는 $-2^{\circ}C$와 $20^{\circ}C$ 저장구에서는 전 저장기간 동안 검출되지 않았으며 $5^{\circ}C$ 저장구 3일째에만 검출되었다. 따라서 종합적으로 돼지 간을 이용한 제조된 퍼짐형 간 제품은 이하에서 14일까지는 식용가능하다고 할 수 있겠다.

Keywords

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