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Effect of Additives in Making Frozen Rice Dough on the Quality of Rice Bread

쌀가루 냉동반죽 제조 시 첨가제가 쌀빵의 품질에 미치는 영향

  • Kim, Kyung-Eun (Dept. of Food Science and Biotechnology, Kyungwon University) ;
  • Lee, Young-Tack (Dept. of Food Science and Biotechnology, Kyungwon University)
  • 김경은 (경원대학교 식품생물공학과) ;
  • 이영택 (경원대학교 식품생물공학과)
  • Published : 2009.10.31

Abstract

The effects of adding additives such as gum, emulsifier, and enzyme both individually and as mixtures to frozen rice bread dough on baking quality were examined. Rice flours containing 17% vital gluten, and gum/emulsifier/enzyme blends were mixed and stored in a freezer at $-20^{\circ}C$ for 4 weeks. The rice doughs were removed from the freezer, thawed, and then followed the rice baking procedure. The dough freezing and frozen storage resulted in decreased volume of rice bread. The addition of guar gum/sodium stearoyl lactylate (SSL)/fungal $\alpha$-amylase blend improved volume of the rice bread obtained from rice dough during frozen storage. An increase in firmness of crumb was observed in rice breads during 3 days of storage at $25^{\circ}C$. Compared to the control dough without additives, addition of guar gum/ SSL blend or guar gum/ SSL/ fungal $\alpha$-amylase blend into frozen dough significantly reduced the crumb firmness of rice bread, indicating a significant antistaling effect.

쌀빵 냉동반죽에 첨가제로 gum, 유화제 및 효소제를 복합처리하여 반죽한 후 $-20^{\circ}C$에서 냉동 보관하면서 냉동반죽의 저장기간에 따른 쌀빵의 품질 특성을 조사하였다. 유화제인 sodium stearoyl lactylate(SSL)와 gum류인 guar gum을 각각 0.5%, 그리고 효소제로 곰팡이 $\alpha$-amylase를 0.01% 수준으로 첨가하여 사용하였다. 냉동반죽의 저장 중 쌀빵의 부피는 냉동기간이 경과함에 따라 감소하였는데, 첨가제를 넣지 않은 대조구 반죽에 비해 guar gum+SSL+곰팡이 $\alpha$-amylase를 복합첨가 한 반죽이 냉동 4주 경과 후에도 쌀빵 제조시 부피의 감소폭이 크지 않은 것으로 나타났다. 쌀빵의 경도 변화에 있어서 대조구 냉동반죽의 냉동저장 기간이 증가함에 따라 그리고 쌀빵의 제조 후 시간이 경과할수록 경도의 변화가 큰 반면, guar gum+SSL 첨가한 쌀빵과 guar gum+SSL+곰팡이 $\alpha$-amylase를 복합첨가 한 쌀빵은 저장기간에 따른 경도의 증가폭이 현저하게 낮은 것으로 나타났다. Gum/유화제/효소제의 복합첨가는 쌀가루 냉동반죽의 저장기간 경과에 따른 쌀빵의 부피 감소를 개선하고 노화를 억제하는 효과를 주어 냉동반죽 쌀빵의 품질에 긍정적인 영향을 미치는 것으로 평가되었다.

Keywords

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