Korean journal of food and cookery science (한국식품조리과학회지)

Korean Society of Food and Cookery Science (한국식품조리과학회)
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Study on Bread-making Quality with Barley Sourdough in Composite Bread

보리 Sourdough의 제빵성 연구

  • Ryu, Chung-Hee (Department of Food & Nutrition, Kunsan National University) ;
  • Kim, Sun-Young (Department of Food & Nutrition, Kunsan National University)
  • 유정희 (군산대학교 식품영양학과) ;
  • 김선영 (군산대학교 식품영양학과)
  • Published : 2005.10.31
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Abstract

Waxy barley flour was fermented by two kinds of starter cultures; L. plantarum and L. brevis, alone or in combination and the effect was evaluated on waxy barley and wheat composite bread quality. In all three barley sourdoughs, fermentation decreased the pH, total sugar and reducing sugar, and increased lactic acid bacteria cell numbers. However yeasts (S. cerevisiae) were reduced. There was significant difference in physicochemical characteristics between the reference(composite barley dough containing improvement agent) and the barley sourdoughs (p <0.05). Barley sourdough fermented by L. plantarum showed more desirable farinogram properties of peak time, stability and elasticity than that of the reference. The rheofermentometer data for L. brevis produced the most $CO_2$ release curve, whereas L. plantarum held maximum $CO_2$ retention differed significantly from that of the breads made with barley sourdoughs fermented with the respectives starter cultures (p < 0.05). Barley sourdough bread fermented with L. plantarum resulted in better bread quality than the reference bread. The positive effect of fermentation with L. plantarum on bread quality was evident when comparing the well developed protein-starch matrix structure of the bread baked with barley sourdough with the reference bread.

흰찰쌀보리가루를 이용한 sourdough의 물리 화학적 특성, 발효 양상 및 물성 등의 반죽특성과 이의 제빵성을 조사하였다. L. plantarum과 L. Brevis 및 이의 혼합처리로써 보리가루를 발효시킨 결과 pH, 총당 및 환원당 등은 감소하였고 젖산균수, 산도는 증가하였으며, 젖산균에 따라 환원당을 제외하고 유의적인 차이가 없었다. 보리 sourdough의 젖산균수는 각 처리구 모두 발효 후 증가하였으나 효모는 감소하였고 젖산균에 따라 이화학적 특성에 차이가 있었다. 특히 L. plantarum을 처리한 보리 sourdough는 반죽의 형성시간, 안정도 및 탄성 등에서 물성개량제를 활용한 보리가루 첨가 대조구에 비해 양호하였고 발효진행속도는 느리나 가스발생량, 가스보유율도 가장 높았다. 또한 보리 sourdough 빵의 pH는 발효하지 않은 빵에 비해 낮았고 수분 및 수분 활성도는 증가하였으며, 필연적으로 L. plantarum를 처리한 보리 sourdough빵의 부피, 경도, 탄성, 관능적 특성 등의 제빵특성에 있어서도 물성개량제를 첨가한 보리가루 첨가 대조구에 비해 우수하였고 이는 빵 내부 조직의 protein-starch matrix의 미세구조에서도 확인되었다.

Keywords

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