Journal of the Korean Society of Food Science and Nutrition (한국식품영양과학회지)

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Qualities of Konjac Containing Tunic Extract from Styela clava

미더덕 껍질 추출물을 함유한 곤약의 제조 및 품질 분석

  • Kim, Si-Kyung (Dept. of Food Science and Biotechnology, Kyungnam University) ;
  • Kim, Seung-Wan (Dept. of Food Science and Biotechnology, Kyungnam University) ;
  • Noh, Su-Jin (Dept. of Food Science and Biotechnology, Kyungnam University) ;
  • Kim, Yeon-Joo (Dept. of Food Science and Biotechnology, Kyungnam University) ;
  • Kang, Ji-Hee (Dept. of Food Science and Biotechnology, Kyungnam University) ;
  • Lee, Seung-Cheol (Dept. of Food Science and Biotechnology, Kyungnam University)
  • 김시경 (경남대학교 식품생명학과) ;
  • 김승완 (경남대학교 식품생명학과) ;
  • 노수진 (경남대학교 식품생명학과) ;
  • 김연주 (경남대학교 식품생명학과) ;
  • 강지희 (경남대학교 식품생명학과) ;
  • 이승철 (경남대학교 식품생명학과)
  • Received : 2012.10.16
  • Accepted : 2012.11.29
  • Published : 2013.03.31
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Abstract

Styela (S.) clava (Korean name: miduduk) tunic is produced as a by-product after processing of S. clava. For utilizing this tunic, a konjac containing the tunic extracts was prepared and the qualities evaluated for their color, textural properties, and sensory attributes. The tunic extract was prepared by boiling tunic with water, followed by filtration through filter paper. Significant 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) radical scavenging activity was found in the tunic extract. Increasing the concentration of tunic extract in the konjac tended to decrease lightness (L) and increase the redness (a) and the yellowness (b) of the konjac. The strength and hardness of the konjac increased with increasing concentrations of the tunic extract. All test samples with a 3 mm thickness had good flexibility and did not break even after 4 times folds. In sensory evaluations, the konjac containing 25% S. clava tunic extracts acquired a relatively higher score. The results suggest that S. clava tunic can be applied to konjac products to improve their quality and functionality.

수산물 가공 부산물로 여겨지는 미더덕 껍질을 소재로 한 식품을 개발하기 위하여 건조한 미더덕 껍질에 물을 가하여 끓인 추출물을 얻은 후, 이를 이용하여 미더덕 껍질 추출물 함유 곤약을 제조하였다. 미더덕 껍질 추출물은 농도가 증가할수록 ABTS 라디칼 소거능이 증가한 것으로 보아 항산화능을 보유하고 있었다. 미더덕 껍질 추출물 함유 곤약의 색도는 미더덕 껍질 추출물의 함량이 증가할수록 L값은 감소하지만 a값과 b값은 증가하였고, 갈색도도 증가하는 경향을 보였다. 또한, 미더덕 껍질 추출물의 함량이 증가할수록 곤약의 강도와 경도가 증가하였으며, 절곡검사 결과 모든 곤약에서 유연성과 탄력성이 우수하였다. 관능검사 결과, 맛과 향은 농도가 높아질수록 미더덕 특유의 맛과 향이 높게 나타났으며, 질감과 촉촉한 정도는 대조군을 포함한 모든 곤약에서 유의차를 보이지 않았고, 전체적인 선호도는 25% 농도의 미더덕 껍질 추출물을 함유한 곤약에서 가장 높았다. 이상의 결과는 적절한 농도의 미더덕 껍질 추출물을 이용하면 기존의 곤약과 비교하여 영양적, 물성적, 관능적으로 소비자들에게 긍정적인 반응을 보일 수 있는 제품이 제조될 수 있음을 시사한다.

Keywords

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