In this study, the influence of mixed starter compositions using Saccharomyces cerevisiae and three mixed probiotics, including Bifidobacterium longum, Enterococcus faecium, and Lactobacillus acidophilus on sourdough and bread preparation was examined. The following probiotic and yeast mixing ratios were used: Exp. 1, probiotics:yeast=2.0:0.1; Exp. 2, 1.5:0.1; Exp. 3, 1.0:0.1 (g/g). Starters for the sourdough preparation were incubated separately for 15 hr, combined, then further incubated for 10 hr. Exp 2 resulted in an increase in the numbers of probiotics and yeast in sourdough by 100 times but reduced pH. This is also reflected by the extent of the acidity increase in sourdough produced in Exp. 2. Among the three groups, bread volume and crumb elongation increased in Exp. 2, but crumb fineness and aroma compounds were not significantly different. In a sensory evaluation, flavor, taste, and overall acceptance for the sourdough produced in Exp. 2 improved markedly.
목차
Abstract 서론 재료 및 방법 미생물 및 배지조성 생균수 측정 Sourdough starter 제조 pH 및 TTA(titratable acidity) 측정 발효율 측정 Sourdough bread 제조 CrumbScan 분석 Firmness 측정 향 성분분석 관능검사 통계처리 결과 및 고찰 혼합 probiotics와 효모의 첨가 혼합비를 달리한 sourdough의생균수 Sourdough의 pH 및 TTA 측정 Sourdough의 발효율 Sourdough의 향 분석 Sourdough법으로 제조한 빵의 특성 관능적 품질평가 요약 문헌