Korean Journal of Food Science and Technology (한국식품과학회지)

Korean Society of Food Science and Technology (한국식품과학회)
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Quality characteristics of functional Nokdujuk prepared with optimum mixing ratio of mulberry leaf and fruit powder by response surface method

반응표면분석법을 이용한 최적 비율의 뽕잎과 오디 분말 첨가 기능성 녹두죽의 품질특성

  • Kim, Min-Ju (Department of Alternative Medicine, Kyonggi University) ;
  • Kim, Ae-Jung (The Graduate School of Alternative Medicine, Kyonggi University)
  • 김민주 (경기대학교 대학원 대체의학과) ;
  • 김애정 (경기대학교 대체의학대학원)
  • Received : 2017.08.21
  • Accepted : 2017.10.06
  • Published : 2017.12.31
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Abstract

This study was performed to develop and evaluate functional prepared with optimum mixing of mulberry leaf and fruit powder using response surface method (RSM). In order to develop the optimized functional Nokdujukr using RSM, mulberry leaf powder (MLP:X1) and mulberry fruit powder (MLF:X2) were set as independent variables, and pH (Y1), sweetness (Y2), viscosity (Y3), L (Y4), a (Y5), b (Y6), color (Y7), flavor (Y8), taste (Y9), overall quality (Y10), TPC (Y11), and DPPH radical scavenging ability ($IC_{50}$)(Y12) were set as dependent variables. The optimum mixing ratio of MLP and MLF was determined to be 3.88 g of MLP and 6 g of MLF. The values of color, flavor, taste, overall quality, TPC, and DPPH radical scavenging ability ($IC_{50}$) of optimized Nokdujuk were 5.20, 5.85, 6.00, 6.22, 330.99 mg TAE/g and 650.10 g/mL, respectively. In conclusion, this study has led to the development of an improved version of Nokdujuk that has antioxidative properties and good sensory evaluation and, will likely serve as a functional meal replacement for the busy modern world.

본 연구의 목적은 반응표면분석법(RSM)을 이용하여 뽕잎과 오디 최적 혼합비율을 첨가한 기능성 녹두죽을 개발하는데 있다. 뽕잎과 오디의 최적 혼합비율을 산출하기 위해서 독립변수로 뽕잎분말(X1)과 오디분말(X2)을 설정하였고, 종속변수로는 pH(Y1), 당도(Y2), 점도(Y3), L(Y4), a(Y5), b(Y6), 색(Y7), 향(Y8), 맛(Y9), 전반적인 기호도(Y10), 총 폴리페놀 함량(Y11) 및 DPPH 라디칼 소거능($IC_{50}$)(Y12)으로 설정하였다. RSM을 이용하여 산출된 뽕잎과 오디의 최적 혼합비율은 뽕잎분말 3.88 g, 오디분말 6 g이었다. 뽕잎과 오디 최적 혼합비율을 첨가한 기능성죽의 총 폴리페놀 함량은 330.99 mg TAE/100 g이였고, DPPH 라디칼 소거능($IC_{50}$)은 650.10 g/mL으로 나타났다. 뽕잎과 오디 최적 혼합비율을 첨가한 기능성죽의 pH는 6.53이었으며, 당도는 $8.93^{\circ}Bx$로 나타났다. 뽕잎과 오디 최적 혼합비율을 첨가한 기능성죽의 색도에서 명도 값은 34.41, 적색도 값은 1.36, 황색도 값은 4.47이였고, 점성은 3584 cP로 나타났다. 뽕잎과 오디 최적 혼합비율을 첨가한 기능성죽의 관능평가에서 색은 5.20, 향은 5.85, 맛은 6.00이고, 전반적인 기호도는 6.22로 관능평가 점수가 우수하게 나타났다. 결론적으로 본 연구를 통해 개발된 뽕잎과 오디 최적혼합비율이 첨가된 기능성 녹두죽은 산화방지 활성 뿐만 아니라 죽이 갖추어야 할 품질특성도 우수하여 바쁜 현대인의 식사대용으로 활용가치가 높다고 본다.

Keywords

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