Applied Biological Chemistry

The Korean Society for Applied Biological Chemistry (한국응용생명화학회)
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Effect of Garlic Powder on Preparation and Quality Characteristics of Yogurt

마늘 분말의 첨가가 요구르트의 제조와 품질에 미치는 영향

  • Cho, Ja-Rae (Department of Human Nutrition and Food Science, Chungwoon University) ;
  • Kim, Ju-Hee (Department of Human Nutrition and Food Science, Chungwoon University) ;
  • In, Man-Jin (Department of Human Nutrition and Food Science, Chungwoon University)
  • 조자래 (청운대학교 식품영양학과) ;
  • 김주희 (청운대학교 식품영양학과) ;
  • 인만진 (청운대학교 식품영양학과)
  • Published : 2007.03.31
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Abstract

Yogurt base was prepared from skim milk supplemented with 0.2-1.0% (w/v) garlic powder and fermented with lactic acid bacteria (the mixed strain of Lactobacillus acidophilus, Bifidobacterium longum and Streptococcus thermophilus) at 40$^{\circ}C$ for 18 h. Quality characteristics of the prepared yogurt were evaluated for acid production (pH and titratable acidity), number of viable cells, viscosity and sensory properties. The addition of garlic powder inhibited the growth of lactic acid bacteria and decreased the acid production. After 18 h incubation, titratable acidity of garlic yogurt was 1.28-1.08% and was lower than that (1.35%) of yogurt made with only skim milk. However, the viscosity of yogurt was remarkably increased by the addition of garlic powder. The sensory score of yogurt added with 0.2% garlic powder was similar to ordinary yogurt in flavor and overall acceptability. According to sensory score and fermentation characteristics, the optimum concentration of garlic powder was around 0.2%.

마늘 분말을 첨가한 호상 요구르트를 개발하기 위하여 탈지분유에 마늘 분말을 혼합하고 Lactobacillus acidophilus, Bifidobacterium longum, Streptococcus thermophilus를 혼합 균주를 접종하여 마늘 분말의 첨가가 유산균의 생육에 미치는 영향과 품질특성 및 관능적 특성을 검토하였다. 마늘 분말을 0.2-1.0%(w/v) 첨가한 결과 산의 생성과 젖산균의 증식이 마늘 분말을 첨가하지 않은 대조군보다 감소되었으며, 18시간 발효시킨 요구르트의 적정 산도는 대조구의 1.35%에서 마늘분말을 1.0% 첨가한 경우 1.08%로 20% 감소하였다. 마늘 분말의 첨가로 요구르트의 점도는 약2배 증가하였으나, 색도는 거의 일정하였다. 요구르트에 설탕을 10% 첨가하고 관능적 특성을 조사한 결과 마늘 분말을 0.5% 이상 첨가한 경우 마늘 향과 맛이 강하게 감지되어 요구르트의 기호도는 낮게 평가되었다. 그러므로 마늘 분말의 첨가량은 0.2% 수준이 적당한 것으로 나타났다.

Keywords

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