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Changes in quality of fried rice with crab meat depending on the storage period and temperature

저장기간 및 저장온도에 따른 꽃게풍미 볶음밥의 품질변화

  • Received : 2014.04.30
  • Accepted : 2014.10.28
  • Published : 2015.02.28

Abstract

The edible crab is among the rich resources that can be used as materials for food products, but living crabs and crabs marinated in soy sauce are the only widely utilized materials for food products. For seafood development, research is needed to promote the use of crabs in various products. In this study, the quality changes of fried rice prepared with crab meat, crab emulsion sauce and crab cooker effluent were investigated. The pH and acidity values did not show any significant difference at $-20^{\circ}C$. The acidity of the fried rice continuously increased during storage at 4 and $25^{\circ}C$. The VBN and TBA values of the fried rice stored at 4 and $25^{\circ}C$ were significantly higher than those of the fried rice stored at $-20^{\circ}C$ during the storage period. The viable cell count of the fried rice stored at $-20^{\circ}C$ changed little during the storage period while that of the fried rice stored at 4 and $25^{\circ}C$ rapidly increased over 2 weeks. For the fried rice stored at $-20^{\circ}C$, the overall quality did not show significant differences during the storage period. In conclusion, the best storage temperature for both quality and safety was found to be $-20^{\circ}C$. At such storage temperature, the quality of the stored instant rice using crab meat did not change, and through research the expanding possibilities of using crab materials were confirmed.

꽃게 조미소재, 야채, 천연조미료 등을 활용하면서, 편의성을 부여하기 위하여 꽃게풍미 볶음밥을 제조하였다. 꽃게풍미 볶음밥의 저장 중 품질변화를 조사하기 위해 -20, 4, $25^{\circ}C$에서 6주 동안 저장하면서 pH, 산도, 총균수, TBA, VBN, 관능적 기호도를 조사하였으며, 총균수 결과를 활용하여 볶음밥의 유통 기한을 예측하였다. pH 변화를 조사한 결과, $-20^{\circ}C$에 저장된 볶음밥의 경우 저장 0주째 pH는 7.74이었고 저장 6주에는 pH 7.76으로 나타나 저장 중 변화가 거의 없는 것으로 나타났다. 적정산도를 조사한 결과, $-20^{\circ}C$에 저장된 볶음밥의 경우 저장 0주째에 0.4%이었고 저장 6주에는 0.4%로 거의 변화가 없었다. 반면, $4^{\circ}C$$25^{\circ}C$의 저장 6주에는 각각 2.7%, 4.6%의 수준으로 나타났다. TBA 값을 측정한 결과, $-20^{\circ}C$에 저장한 볶음밥의 경우 저장 0주째 $1.07{\mu}g/g$이었고, 저장 6주까지 $1.39{\mu}g/g$으로 나타나 저장 중 다소 증가하는 경향을 보였다. 휘발성염기질소를 조사한 결과, $-20^{\circ}C$에 저장된 볶음밥의 경우 저장 0주째에 26.60 mg%이었고, 저장 6주에는 28.14 mg%로 나타나 신선도가 유지되는 것으로 사료되었다. $4^{\circ}C$$25^{\circ}C$의 저장 6주에는 각각 65.15 mg%, 68.00 mg% 수준으로 나타났다. 총균수의 변화를 조사한 결과, $-20^{\circ}C$ 저장된 볶음밥의 경우 저장 0주째 3.58 log CFU/g이었고 저장 6주째에는 4.11 log CFU/g으로 나타나 미생물변화는 안정적인 것으로 관찰되었다. 관능적 기호도를 조사한 결과, $-20^{\circ}C$에 저장된 볶음밥의 경우 종합적 기호도의 변화를 보았을 때, 저장초기 7.8이었고 6주째에는 6.7으로 나타나 저장 기간 동안 처리구 중 가장 높은 평가를 받았다. $25^{\circ}C$의 경우 저장초기 7.5이었으나, 저장 6주째 1.0 수준의 평가를 받아 저장온도 및 저장기간 동안 가장 낮은 평가를 받았다. 미생물 결과를 토대로 볶음밥의 유통기한을 예측한 결과, $-20^{\circ}C$에 저장할 경우 14.9주, $4^{\circ}C$에서 저장할 경우 0.4주 인 것으로 각각 조사되었다. 이상의 결과를 종합해 볼 때, 꽃게풍미 볶음밥은 $-20^{\circ}C$에서 저장하는 것이 미생물학적 및 관능적인 측면에서 저장성이 좋을 것으로 사료되었고, 편의식품화로서의 이용 가능성이 있을 것으로 생각되었다.

Keywords

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