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

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Effect of Whey Ferment Cultured by L. acidophilus KCCM 32820 and P. freudenreichii KCCM 31227 on Rheological Properties of Bread Dough

L. acidophilus KCCM 32820과 P. freudenreichii KCCM 31227로 발효한 유청 발효물이 빵 반죽의 레올로지 특성에 미치는 영향

  • Lee, Jeong-Hoon (Dept. of Applied Biology & Chemistry, Konkuk University) ;
  • Lee, Si-Kyung (Dept. of Applied Biology & Chemistry, Konkuk University)
  • 이정훈 (건국대학교 응용생물화학과) ;
  • 이시경 (건국대학교 응용생물화학과)
  • Published : 2009.06.30
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Abstract

This study was carried out to investigate the rheological properties of bread dough containing whey ferment cultured by L. acidophilus KCCM 32820 and P. freudenreichii KCCM 31227. Instrumental analysis such as farinograph, amylograph, extensograph, fermentation power, total titratable acidity (TTA) of dough and pH of dough were tested. On farinograph, difference of water absorption between doughs with and without whey ferment was 0.4% and dough containing whey ferment showed long development time of 3.2 min compared to dough without whey ferment, but showed shorter stability of 16.2 min. On amylograph, there was no significant difference on gelatinization and maximum viscosity temperature; however, maximum viscosity of flour with whey ferment revealed low amylograph unit. On extensograph, value of resistance and R/E ratio of dough containing whey ferment were higher than those of dough without whey ferment. On analysis of dough fermentation power by yeast, dough without whey ferment showed higher volume than dough with whey ferment during fermentation of 240 min. However, TTA of dough was higher in dough with whey ferment than that of the control without whey ferment, even though pH value was low.

L. acidophilus KCCM 32820과 P. freudenreichii KCCM 31227로 발효한 유청 발효물이 빵 반죽의 레올로지 특성에 미치는 영향으로 farinograph, amylograph, extensograph, 발효팽창력, 반죽의 총산도 및 반죽의 pH 등을 측정하였다. Farinograph에서 밀가루의 흡수율에는 유청 발효물의 영향이 아주 적었으나 유청 발효물을 첨가한 반죽의 반죽생성시간은 3.2분 길었고 안정도는 16.2분 짧았다. Amylograph에서 호화개시온도와 최고점도온도에는 유청 발효물의 영향을 거의 없었으나 최고점도는 낮아졌다. Extensograph에서 반죽의 저항성과 R/E비율은 유청 발효물 첨가로 높아졌으나 신장성은 낮아졌다. 효모에 의한 발효팽창력은 유청 발효물에 의하여 감소하였고, 반죽의 총산도는 증가하였으나 pH는 낮아졌다.

Keywords

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