Food Science and Preservation (한국식품저장유통학회지)

The Korean Society of Food Preservation (한국식품저장유통학회)
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Preparation of Yogurt Supplemented with Sweet Persimmon Powder and Quality Characteristics

단감 분말을 첨가한 요구르트 제조 및 품질특성

  • 조영수 (동아대학교 응용생명공학부) ;
  • 차재영 (동아대학교 응용생명공학부) ;
  • 권오창 (동아대학교 응용생명공학부) ;
  • 옥민 (동아대학교 응용생명공학부) ;
  • 신승렬 (대구한의대학교 생명자원공학부)
  • Published : 2003.06.01
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Abstract

Yogurt base was prepared from skim milk supplemented with sweet persimmon powder at the levels of 4% and 7％ and was fermented with Lactobacillus acidophillus. Sweet persimmon powder contained protein 2.2%, fat 30.5%, carbohydrate 56.6% and ash 2.5%, Quality characteristics of prepared yogurt were evaluated for acid production(pH), visible cell numbers, sensory property and oganic acid compositions during fermentation. Lactic acid content in yogurt supplemented with sweet persimmon powder was higher (1.12%∼l.21%) than that (1.05%) in yogurt made with only skim milk after 24 hours fermentation. The sensory score was higher yogurt made with skim milk than yogurt supplemented with sweet persimmon powder in taste, texture and overall acceptability. However, the acid production in yogurt supplemented with sweet persimmon powder were not significantly difference compared to yogurt made with skim milk The antioxidative activity by DPPH(a-a'-diphenyl-${\beta}$-picrylhydratyl) method in yogurt supplemented with sweet persimmon powder and yogurt made with skim milk were higher than BHT 0.005 ％ used as control.

단감분말을 첨가한 호상 발효유를 제조하기 위하여 탈지분유에 단감분말을 4% 및 7% 첨가하여 Lactobacillus acidophillus 균주를 접종하여 유산균의 생육에 미치는 영향과 관능적 특성 및 품질 특성을 검토하였다. 단감분말은 단백질 2.2%, 지질 30.5%, 탄수화물 56.6% 및 회분 2.5%를 함유하였다. 단감분말을 첨가하여 24시간 발효시킨 발효유의 유기산중 lactic acid 농도가 1.12%∼1.21%로 탈지분유만을 사용하여만든 발효유 1.05% 보다 높았다. 관능검사 결과에서는 단감분말을 첨가시킨 발효유보다는 탈지분유만을 사용한 발효유에서 선호도가 약간 높게 나왔다. 그러나, 발효유의 산 생성능으로 나타낸 pH는 각 발효유 사이에 큰 차이가 없었다. DPPH(a-a'-diphenyl-$\beta$-picrylhydratyl) 측정법에 의한 항산화 활성은 탈지분유 14%, 탈지분유 10%＋단감분말 4%, 탈지분유7%+단감분말 7%를 함유한 각각의 발효액에서 대조구로 사용한 시판 항산화제 BHT 0.005%보다 약간 높게 나왔다. 따라서 단감건조 분말을 이용한 식품 신소재 개발을 위한 기초자료를 제공하고 단감첨가 발효유의 생리적 유용성을 활용할 수 있는 가능성이 있는 것으로 사료되었다.

Keywords

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