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

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Quality Characteristics of Tofu (Soybean Curd) Added with Cheongyang Hot Pepper (Capsicum Annuum L.) Juice

청양고추 착즙액을 첨가한 두부의 품질 특성

  • Hwang, In-Guk (Dept. of Agro-food Resources, National Academy of Agricultural Science, Rural Development Administration) ;
  • Hwang, Young (Dept. of Agro-food Resources, National Academy of Agricultural Science, Rural Development Administration) ;
  • Kim, Ha-Yun (Dept. of Agro-food Resources, National Academy of Agricultural Science, Rural Development Administration) ;
  • Lee, Jun-Soo (Dept. of Food Science and Technology, Chungbuk National University) ;
  • Jeong, Heon-Sang (Dept. of Food Science and Technology, Chungbuk National University) ;
  • Yoo, Seon-Mi (Dept. of Agro-food Resources, National Academy of Agricultural Science, Rural Development Administration)
  • 황인국 (농촌진흥청 국립농업과학원 농식품자원부) ;
  • 황영 (농촌진흥청 국립농업과학원 농식품자원부) ;
  • 김하윤 (농촌진흥청 국립농업과학원 농식품자원부) ;
  • 이준수 (충북대학교 식품공학과) ;
  • 정헌상 (충북대학교 식품공학과) ;
  • 유선미 (농촌진흥청 국립농업과학원 농식품자원부)
  • Received : 2011.05.03
  • Accepted : 2011.06.03
  • Published : 2011.07.31
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Abstract

This study was conducted to investigate the quality characteristics of tofu (soybean curd) prepared with added Cheongyang hot pepper juice (CPJ). The moisture, crude protein, crude lipid, and crude ash contents of the control tofu were 82.98%, 10.26%, 4.86%, and 0.41%, respectively. The moisture content of tofu decreased according to the level of added CPJ, whereas the crude protein, crude lipid, and crude ash contents increased. The yield of tofu prepared with 5% CPJ significantly increased relative to that of control tofu. The turbidity and acidity increased with increasing concentration of CPJ, whereas pH decreased. The Hunter's color values of the tofu were significantly lower in L and a values and significantly higher in b values with increasing concentration of CPJ. The hardness, adhesiveness, and springiness of the tofu samples did not differ significantly according to the level of added CPJ. Capsaicin, dihydrocapsaicin, total polyphenol contents, and antioxidant (DPPH radical and ABTS radical scavenging activity) activities were significantly increased with increasing concentration of CPJ. Sensory evaluation indicated that the tofu prepared with 5% CPJ was not significantly different from the control tofu. Overall, CPJ could be used as an effective ingredient to improve the sensory and antioxidant properties of tofu without affecting the quality properties.

본 연구에서는 청양고추즙을 두유량의 5%, 10%, 15%(v/v)가 되도록 첨가하여 제조한 두부의 품질 특성 변화를 조사하였다. 제조된 두부의 수분 함량은 청양고추즙 첨가량이 증가할수록 감소하는 경향을 보였지만 무첨가 두부에 비해 높았으며, 조단백, 조지방 및 조회분 함량은 청양고추즙 첨가량에 따라 증가하는 경향을 보였다. 두부의 수율은 5% 청양고추즙 첨가 두부에서 대조구에 비해 유의적으로(p<0.05) 높게 나타났다. 청양고추즙 첨가량이 증가할수록 탁도 및 총산도는 증가하였으며, pH는 감소하는 경향을 보였다. 두부의 색도는 청양고추즙을 첨가하였을 때 L값과 a값은 감소하고 b값은 증가하였다. 청양고추즙 첨가 두부의 견고성, 부착성, 탄력성, 검성, 씹힘성은 첨가량에 따라 증가하는 경향을 보였으나 대조구에 비해 감소하는 것으로 나타났다. 청양고추즙 첨가 두부의 capsaicin, dihydrocapsaicin, 총 폴리페놀 함량과 DPPH 및 ABTS radical 소거활성은 첨가량에 비례하여 각각 1.62~5.21, 0.35~1.33, 31.08~42.94 mg/100 g 및 4.14~6.26, 10.50~14.91 AEAC로 증가하였다. 두부의 관능검사 결과 점수는 청양고추즙 첨가량이 증가할수록 감소하는 경향을 보였으나, 5% 첨가 두부가 대조구에 비해 유의적인 차이는 없었으나 다소 높은 점수를 받았다. 이상의 결과로부터 두부 제조 시 청양고추즙의 첨가는 두부의 품질 특성은 유지하면서 관능적 특성 및 기능성의 향상을 기대할 수 있으며, 적정 첨가량은 5% 이내가 적합할 것으로 판단된다.

Keywords

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