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

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Effects of Enzymes and Emulsifiers on the Loaf Volume and Crumb Hardness of Rice Breads

효소제 및 유화제의 첨가가 쌀빵의 부피와 경도에 미치는 영향

  • Lee, Myung-Hee (Dept. of Food Science and Biotechnology, Kyungwon University) ;
  • Chang, Hak-Gil (Dept. of Food Science and Biotechnology, Kyungwon University) ;
  • Lee, Young-Tack (Dept. of Food Science and Biotechnology, Kyungwon University)
  • 이명희 (경원대학교 식품생물공학과) ;
  • 장학길 (경원대학교 식품생물공학과) ;
  • 이영택 (경원대학교 식품생물공학과)
  • Published : 2008.06.30
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Abstract

The effects of various enzymes and emulsifiers on the loaf volume and crumb hardness of rice breads were studied. Four different enzymes [fungal ${\alpha}$-amylase (AMYL), maltogenic bacterial ${\alpha}$-amylase (NMYL), glucose oxidases (GO), and xylanase+hemicellulases (PTP)] and four emulsifiers [sorbitan monostearate (SMS), glycerol monostearate (GMS), sodium stearoyl lactylate (SSL), and glycerol ester+propylene glycol ester+sucrose ester+sorbitan ester (SP)] were supplemented to rice dough. The addition of AMYL, GO, and GO+AMYL increased loaf volume of rice breads. The highest loaf volume was observed in rice bread supplemented with AMYL. Rice breads supplemented with enzymes firmed at lower rates during storage, and AMYL, NMYL, and GO considerably decreased crumb hardness of rice breads, exhibiting a significant antistaling effect. The addition of emulsifiers produced rice breads with better specific loaf volume and crumb texture, and continuously retarded crumb hardness of rice breads during storage. Especially, rice bread supplemented with SSL demonstrated the highest loaf volume and the lowest crumb hardness during storage.

효소제와 유화제의 첨가가 쌀빵의 품질특성중 빵의 부피와 저장중 경도 변화에 미치는 영향을 조사하였다. 효소제로는 곰팡이 ${\alpha}$-amylase(AMYL), 세균 ${\alpha}$-amylase(NMYL), glucose oxidase(GO), 그리고 xylanase+hemicellulase (PTP)를 사용하였으며, 유화제로 sorbitan monostearate (SMS), glycerol monostearate(GMS), sodium stearoyl lactylate(SSL), glycerol ester+propylene glycol ester+sucrose ester+sorbitan ester(SP)를 첨가하여 그 효과를 비교하였다. 쌀가루에 AMYL, GO, 그리고 AMYL+GO 효소를 처리한 쌀빵의 비용적이 대조구 쌀빵에 비해 높게 나타났는데, 특히 AMYL을 첨가한 처리구에서 가장 높은 수치를 보여주었다. 쌀빵의 저장 중 경도 변화를 측정하였을 때 AMYL, NMYL, 그리고 GO를 첨가한 처리구에서 3일 경과 후에도 낮은 증가율을 나타내 쌀빵의 노화지연에 긍정적인 효과를 제시해 주었다. 쌀가루에 유화제를 첨가한 쌀빵의 부피는 모든 유화제 처리구가 대조구 쌀빵보다 높게 나타났으며 저장중 경도가 지속적으로 낮았다. 특히 SSL은 쌀빵의 부피 개선과 함께 노화지연의 효과가 가장 높아 쌀빵의 품질 개량을 위해 적용할 수 있는 매우 긍정적인 유화제로 평가되었다.

Keywords

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