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Quality characteristics of frozen cookie dough using rice flour of super yield Korean rice varieties

초다수성 쌀가루를 이용한 쿠키용 냉동반죽의 품질 특성

  • Lee, Nayoung (Department of Food Science and Biotechnology, Kunsan National University) ;
  • Ha, Ki-Young (National Institute of Crop Science, Rural Development Administration)
  • 이나영 (군산대학교 식품생명공학과) ;
  • 하기용 (농촌진흥청 국립식량과학원)
  • Received : 2014.09.04
  • Accepted : 2014.11.21
  • Published : 2015.02.28

Abstract

The highly producible rice cultivars, hanareum and dasan 2, were prepared and investigated for their physicochemical properties, and the quality characteristics of frozen cookie dough with rice flour according to the thawing time were measured. The water, ash, crude protein, amylose, and damaged starch contents of rice flour, as well as its water holding capacity, particle size, and Hunter color value, were measured. The water, ash, and crude protein contents of the hanareum and dasan 2 rice flours were shown to range from 7.28 to 13.14%, from 0.35 to 0.39, and from 6.05 and 8.68%, respectively. The protein content of the control group was higher than that of hanareum and dasan 2 rice flours. The amylose contents of the hanareum and dasan 2 rice flour were 19.05 and 23.04%, respectively. The damaged starch content and water holding capacity of the control group were lower than those of the hanareum and dasan 2 rice flours. The particle sizes of the samples were $48.54{\sim}50.05{\mu}m$. The lightness values of the hanareum, and dasan 2 rice flour, and of the control were 93.72, 93.51 and 92.63, respectively. The quality characteristics of the gluten-free frozen cookie dough were investigated. The lightness of the cookie made with frozen cookie dough decreased according to the by thawing time, but the diameter of the cookie did not differ significantly. The hardness of the cookie made with rice frozen dasan 2 rice dough was lower than that of the cookie made with frozen hanareum rice dough.

초다수성 쌀품종인 한아름 및 다산 2호 쌀가루의 이화학적 특성을 분석하고, 이를 이용하여 제조한 쿠키용 쌀냉동 반죽의 품질 특성에 대해 조사하였다. 초다수성 쌀가루의 이화학적 특성은 수분 함량, 회분 함량, 단백질 함량, 아밀로오즈 함량, 손상전분, 수분 결합력, 입도 및 색도에 대해 분석하였다. 한아름 및 다산 2호 쌀가루, 대조구의 수분함량 및 회분 함량은 각각 7.70, 7.28, 13.14% 및 0.39, 0.35, 0.39%로 나타났다. 또한 단백질 함량의 경우 대조구가 8.68%로 한아름 및 다산 2호 쌀가루의 6.62 및 6.05% 보다 높게 나타났다. 한아름 및 다산 2호 쌀가루의 아밀로오즈 함량은 각각 19.05 및 23.04%를 나타냈다. 손상전분의 경우 한아름 및 다산 2호 쌀가루는 각각 13.73 및 14.09%의 전분 손상도를 나타냈으며 대조구의 경우 4.45%의 전분 손상도를 나타내어 쌀가루의 전분 손상도가 높음을 확인하였다. 수분 결합력의 경우 대조구의 경우 177.69%의 수분 결합력을 보인 반면 한아름 및 다산 2호 쌀가루의 수분 결합력은 270.50 및 281.17%로 높은 수분 결합력을 나타내는 것으로 확인하였다. 또한, 한아름 및 다산2호 쌀가루의 평균 입도는 각각 50.05 및 $49.50{\mu}m$를 나타냈으며 대조구의 경우 $48.54{\mu}m$의 평균 입도를 나타냈다. 시료의 색도 분석의 경우 대조구 명도는 92.63을 나타낸 반면 한아름 및 다산 2호 쌀가루는 93.72 및 93.51을 나타내어 대조구보다 높은 명도를 나타내는 것으로 확인하였다. 초다수성 쌀가루를 이용한 쿠키용 쌀냉동반죽의 해동시간에 따른 품질 특성을 분석하였다. 쌀냉동반죽 이용 쿠키의 명도는 해동 시간이 증가할수록 명도가 감소하는 경향을 나타냈다. 쿠키용 쌀냉동반죽을 이용하여 제조한 쿠키의 직경은 해동 시간에 따른 유의적인 차이는 나타내지 않았으나 쿠키 두께의 경우 다산 2호 쌀가루 이용한 냉동반죽을 30분간 해동 후 구운 쿠키의 두께가 가장 높은 것으로 확인되었다. 쌀냉동반죽을 이용하여 제조한 쿠키의 경도를 분석한 결과 초다수성 쌀가루 중 다산 2호 쌀가루를 이용하여 제조한 냉동반죽을 해동 후 바로 구운 쿠키의 경도가 980.78 g로 가장 낮게 나타났다.

Keywords

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