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Quality Characteristics and Antioxidant Properties of Cookies Supplemented with Persimmon Leaf Powder

감잎 분말을 첨가한 쿠키의 품질 특성과 산화방지 활성

  • Lim, Jeong Ah (Department of Food Science and Engineering, Daegu University) ;
  • Lee, Jun Ho (Department of Food Science and Engineering, Daegu University)
  • Received : 2016.02.15
  • Accepted : 2016.04.04
  • Published : 2016.04.30

Abstract

This study was conducted to investigate the quality characteristics and antioxidant properties of cookies supplemented with 1-4% (w/w) persimmon leaf powder (PLP). pH and density of the cookie dough increased significantly with increase in PLP concentration (p<0.05). The moisture content, spread ratio, and loss rate of cookies decreased significantly with increase in PLP concentration (p<0.05). Lightness ($L^*$), redness ($a^*$), and yellowness ($b^*$) also decreased significantly with increase in PLP concentration (p<0.05). The use of PLP significantly increased the hardness of the cookies. Moreover, 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2'-azino-bis-3-ethylbenzthiazoline-6-sulphonic acid (ABTS) radical scavenging activities were significantly elevated (p<0.05). The consumer acceptance test indicated that addition of PLP at a concentration of up to 2% (w/w) garnered a favorable response from consumers with respect to softness, taste, and overall preference. On the basis of the overall observations, cookies supplemented with 2% (w/w) PLP were found to benefit from the functional properties of PLP, without compromising on consumer acceptance.

박력분 밀가루에 대한 감잎 분말 대체량을 0-4%로 달리하여 쿠키를 제조한 후 물리 화학적 품질특성, 산화방지 활성 및 소비자 기호도에 대한 실험과 조사를 진행하였다. 쿠키 반죽의 pH와 밀도는 감잎 분말 첨가량이 증가함에 따라 유의적으로 증가하였으며(p<0.05), 수분 함량은 유의적인 차이를 나타내며 감소하는 경향을 보였다(p<0.05). 쿠키의 퍼짐성과 손실률은 감잎 분말 첨가량이 증가함에 따라 유의적으로 감소하는 경향을 보였다(p<0.05). 명도($L^*$), 적색도($a^*$) 및 황색도($b^*$) 모두 감잎 분말의 첨가량이 증가함에 따라 유의적으로 감소하는 경향을 보였으며(p<0.05), 경도는 유의적으로 증가하는 경향을 보였다(p<0.05). 산화방지 활성을 나타내는 DPPH에 대한 전자공여능 및 ABTS에 대한 라디칼 소거능은 유의적인 차이를 나타내며 증가하였고(p<0.05), 두 지표 간의 상관관계가 매우 높은 것으로 나타났다. 소비자 기호도 검사 결과 색과 부드러운 정도는 1% 첨가군이 가장 높았고, 향과 맛은 대조군, 전체적인 기호도는 2% 첨가군이 가장 높았으나, 대부분 항목에서 대조군과 1% 및 2% 첨가군 사이에서 유의적인 차이가 발견되지 않았으며 감잎 분말의 최적 첨가량은 2%인 것으로 판단된다. 한편 본 연구는 활용 범위가 작아 대부분 폐기되는 농산폐기물인 감잎을 활용하여 고부가가치 상품인 감잎 쿠키를 상품화하는데 필요한 실험적 data를 제공하고 있으며, 따라서 이를 활용한다면 소비자들에게 기능성과 기호성 모두 가진 쿠키를 제공할 수 있을 것으로 생각된다.

Keywords

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