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Manufacture technology of tofu shake added with red rice

홍국쌀을 첨가한 두부 셰이크의 제조기술

  • Cho, Eun-Jeong (Department of Food Processing and Distribution, Gangneung-Wonju National University) ;
  • Lee, Sang-Soo (Department of Food Processing and Distribution, Gangneung-Wonju National University) ;
  • Kwon, Dong-Jin (Department of Food Processing and Distribution, Gangneung-Wonju National University)
  • 조은정 (강릉원주대학교 식품가공유통학과) ;
  • 이상수 (강릉원주대학교 식품가공유통학과) ;
  • 권동진 (강릉원주대학교 식품가공유통학과)
  • Received : 2017.11.03
  • Accepted : 2017.11.23
  • Published : 2017.11.30

Abstract

To establish manufacturing technology of tofu shake added with red rice prepared with Monascus purpureus KCCM 60570, the quality characteristics of tofu shake added with M. purpureus KCCM 60570 were investigated. Also, we determined the optimal mixing ratios of raw materials including red rice for manufacturing tofu shake. Monacolin K and mold number of red rice were increased rapidly until $8^{th}$ day of incubation and then gradually increased during the 12 day manufacturing period. As the results, it was considered to be most suitable to prepare red rice for 8 days at $25^{\circ}C$, and inoculate 1% (w/w) M. purpureus KCCM 60570. Sensory evaluation of tofu shake added with red rice and tofu shake without red rice was not significantly different at p<0.05. In sensory evaluation, tofu shake added with 0.5% (w/w) red rice was higher in taste, texture, and overall acceptability than the other. Therefore, the optimal mixing ratio of red rice and tofu shake is 0.5% (w/w). These results suggest that the addition of red rice could improve the quality of tofu shake.

본 연구에서는 홍국쌀에서 분리한 M. purpureus KCCM 60570을 찐 쌀에 1.0% (w/w) 접종 후 $25^{\circ}C$에서 배양하면서 홍국쌀 제조 조건 확립 및 품질 특성을 확인하였다. 또한 기존의 두부 셰이크에 홍국쌀을 첨가한 두부 셰이크의 기호도 조사를 통해 적정한 혼합비율을 결정하고, 품질 특성을 확인하였다. M. purpureus KCCM 60570으로 제조한 홍국쌀의 monacolin K와 곰팡이수를 확인한 결과 배양 8일차까지 급격히 증가하다가 이후 완만히 증가하여 홍국쌀의 적정제조온도 및 시간은 $25^{\circ}C$에서 8일로 나타났다. 기존의 두부 셰이크에 M. purpureus KCCM 6057으로 $25^{\circ}C$에서 8일간 제조한 홍국쌀을 서로 다른 농도로 첨가한 두부 셰이크의 관능검사 결과 맛, 향, 조직감 및 전체적인 기호도에서 0.5%(w/w) 홍국쌀을 첨가한 두부 셰이크의 기호도가 가장 높은 것으로 나타나 두부 셰이크의 적정 홍국쌀 혼합 비율은 0.5% (w/w)인 것으로 나타났다. 홍국쌀을 0.5% (w/w) 첨가한 두부 셰이크와 기존 시판 두부 셰이크의 품질 특성을 비교한 결과 홍국쌀 첨가 두부 셰이크의 환원당과 총당함량, 붉은 색소인 monacolin K와 색도 a 값이 월등히 높은 것으로 나타났다. 또한 기존 두부 셰이크와 0.5% (w/w) 홍국쌀을 첨가한 두부 셰이크와의 관능검사를 비교한 결과 색과 조직감이 좋은 것으로 나타나 두부 셰이크 제조에 홍국쌀을 첨가할 경우 두부 셰이크의 품질을 개선할 수 있는 가능성을 확인할 수 있었다.

Keywords

References

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