Journal of the Korean Society of Food Science and Nutrition (한국식품영양과학회지)

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Quality Characteristics of Saccharified Rice Gruel Prepared with Different Cereal Koji

곡류 코지를 이용하여 제조한 당화쌀죽의 품질 특성

  • Hwang, In-Guk (Dept. of Agro-food Resources, National Academy of Agricultural Science, Rural Development Administration) ;
  • Yang, Ji-Won (Dept. of Agro-food Resources, National Academy of Agricultural Science, Rural Development Administration) ;
  • Kim, Ja-Young (Dept. of Agro-food Resources, National Academy of Agricultural Science, Rural Development Administration) ;
  • Yoo, Seon-Mi (Dept. of Agro-food Resources, National Academy of Agricultural Science, Rural Development Administration) ;
  • Kim, Gi-Chang (Dept. of Agro-food Resources, National Academy of Agricultural Science, Rural Development Administration) ;
  • Kim, Jin-Sook (Dept. of Agro-food Resources, National Academy of Agricultural Science, Rural Development Administration)
  • 황인국 (농촌진흥청 국립농업과학원 농식품자원부) ;
  • 양지원 (농촌진흥청 국립농업과학원 농식품자원부) ;
  • 김자영 (농촌진흥청 국립농업과학원 농식품자원부) ;
  • 유선미 (농촌진흥청 국립농업과학원 농식품자원부) ;
  • 김기창 (농촌진흥청 국립농업과학원 농식품자원부) ;
  • 김진숙 (농촌진흥청 국립농업과학원 농식품자원부)
  • Received : 2011.08.29
  • Accepted : 2011.09.26
  • Published : 2011.11.30
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Abstract

We conducted this study to investigate the quality characteristics of saccharified rice gruel prepared with different cereal koji mold (rice, buckwheat, sorghum, adlay, or Italian millet koji). The moisture, crude protein, crude lipid, and crude ash content of rice, buckwheat, sorghum, adlay, and Italian millet showed a range of 11.12~12.85, 5.81~16.24, 0.56~4.36, and 0.28~1.93%, respectively. The proximate composition of saccharified rice gruel prepared with different cereal koji was significantly (p<0.05) higher than unsaccharified rice gruel. The pH, L, a, and b values of saccharified rice gruel ranged between 6.09~6.39, 60.38~78.25, -0.87~5.70, and 7.74~13.37, respectively. The viscosity of saccharified rice gruel prepared with different cereal koji was significantly (p<0.05) lower than the unsaccharified rice gruel. After saccharification, the soluble solids, glucose, and maltose content of saccharified rice gruel prepared with different cereal koji were significantly increased in the range of 11.47~13.03$^{\circ}Brix$, 0.60~1.44%, and 0.47~0.88%, respectively. A sensory evaluation indicated that saccharified rice gruel was significantly (p<0.05) better than unsaccharified rice gruel. In conclusion, cereal koji could be used as a gruel processing method to increase the sensory properties and nutritional values of gruels.

본 연구는 쌀, 메밀, 수수, 율무 및 조 등의 곡류 코지를 이용하여 제조한 당화쌀죽의 이화학적 특성 및 관능 특성을 검토하였다. 원료로 사용한 쌀, 메밀, 수수, 율무, 조의 수분, 조단백질, 조지방 및 조회분 함량은 각각 11.12~12.85, 5.81~16.24, 0.56~4.36 및 0.28~1.93% 범위였다. 일반 쌀죽의 조단백질, 조지방 및 조회분 함량 1.33, 0.02 및 0.05%였고, 곡류 코지를 이용하여 제조한 당화쌀죽의 경우 1.33~2.27%, 0.02~0.25% 및 0.05~0.15% 범위로 일반 쌀죽보다 유의적으로(p<0.05) 높은 함량을 보였다. 원료 및 당화쌀죽의 pH는 각각 6.15~6.97 및 6.09~6.39 범위로 당화쌀죽 제조 후 pH는 감소하였다. 원료의 L, a 및 b값은 각각 74.88~87.94, 0.04~6.54 및 8.96~11.39 범위였고, 일반쌀죽은 78.39, -2.06 및 2.69였으며, 당화쌀죽의 경우 각각 60.38~78.25, -0.87~5.70 및 7.74~13.37 범위로 원료의 고유 색소성분에 의해 죽의 색도가 영향을 받는 것으로 나타났다. 곡류 코지를 이용하여 제조한 당화쌀죽의 점도는 15,600~19,600 cP로 일반 쌀죽의 27,266 cP에 비해 유의적으로(p<0.05) 감소하였다. 가용성 고형분 함량은 일반 쌀죽의 경우 8.55$^{\circ}Brix$였고, 곡류 코지를 이용하여 제조할 경우 11.47~13.03$^{\circ}Brix$로 약 1.3~1.5배 높게 나타났다. 일반쌀죽의 유리당으로는 glucose(0.06%)만 검출되었고, 곡류 코지를 이용하여 제조한 당화쌀죽에서는 glucose와 maltose가 각각 0.60~1.44 및 0.47~0.88% 범위로 일반쌀죽에 비해 유의적으로(p<0.05) 높게 나타났다. 죽의 관능평가 결과 일반쌀죽에 비해 곡류 코지를 이용하여 제조한 당화쌀죽이 향, 맛, 조직감, 점도 및 전반적 기호도 등의 평가항목에 대하여 전반적으로 우수한 관능특성을 나타냈다. 이상의 결과로부터 엿기름을 이용한 전통식 혜얌죽의 소화하기 편하고 적절한 단맛을 죽을 제공한 바와같이 본 연구에서도 이를 응용한 죽 제조 시 전분분해력을 갖는 곡류 코지를 이용한 당화방법의 적용은 무가당 죽의 제조가 가능하며, 또한 죽의 관능특성 및 영양학적 가치를 향상시킬 수 있는 기초자료로 활용될 수 있을 것으로 기대된다.

Keywords

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