Food Science and Preservation (한국식품저장유통학회지)

The Korean Society of Food Preservation (한국식품저장유통학회)
권호 표지

Quality Characteristics of Tea Thermally Processed from Dried Ixeris dentata Root

열처리에 따른 씀바귀 침출차의 품질특성

  • Lee, Ka-Soon (Geumsan Ginseng & Medicinal Crop Experiment Station, CNARES) ;
  • Kim, Gwan-Hou (Geumsan Ginseng & Medicinal Crop Experiment Station, CNARES) ;
  • Kim, Hyun-Ho (Geumsan Ginseng & Medicinal Crop Experiment Station, CNARES) ;
  • Kim, Eun-Soo (Department of Food Science and Technology, Chungnam National University) ;
  • Park, Hae-Min (Department of Food Science and Technology, Chungnam National University) ;
  • Oh, Man-Jin (Department of Food Science and Technology, Chungnam National University)
  • 이가순 (충남농업기술원금산인삼약초시험장) ;
  • 김관후 (충남농업기술원금산인삼약초시험장) ;
  • 김현호 (충남농업기술원금산인삼약초시험장) ;
  • 김은수 (충남대학교 식품공학과) ;
  • 박혜민 (충남대학교 식품공학과) ;
  • 오만진 (충남대학교 식품공학과)
  • Published : 2008.08.30
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Abstract

To investigate tea prepared from Ixeris dentata root, color, and levels of free sugars, organic acids, cynaroside, total polyphenolics, and free amino acids were investigated using various thermal processing methods. These included natural drying(ND), hot-air drying(HAD, $75^{\circ}C$), hot-air drying after steam(HADS, steaming at $95^{\circ}C$ for 30 min) and roasting after hot-air drying(RHAD, roasting at $140^{\circ}C$ for $2{\sim}3$ min). Total free sugars, organic acids, cynaroside, and free amino acids contents were highest after ND treatment. Total polyphenolics was highest after RHAD processing. The level of cynaroside, a principal component of Ixeris dentata root, was significantly decreased by HADS. The major free sugars were fructose, glucose and sucrose. Succinic acid was prominent among organic acids, and was present at 2.25%(v/v) after ND treatment. The lightness(L), redness(a), and yellowness(b) of all dried Ixeris dentata root powders were best after RHAD treatment, but analysis of the leaching liquids after hot water treatment yielded variable results. Lightness and redness were the highest after RHAD and yellowness was the highest after ND treatment. Overall, the RHAD drying method was found to be superior to other methods, in sensory evaluation tests.

씀바귀뿌리를 이용하여 침출차를 제조하고자 건조온도 및 처리조건을 달리하여 유리당, 유기산, cynaroside 및 총폴리페놀성물질 함량, 유리아미노산, 색도 및 관능적 특성을 검토하였다. 총유리당, 유기산, 유리아미노산 및 cynaroside 의 함량은 천일건조한 것이 가장 높았으며 총폴리페놀성 함량은 열풍건조 후 볶음 처리한 것이 가장 높았다. 건조한 씀바귀뿌리의 유리당 중 sucrose, glucose, fructose 및 galactose는 열풍건조에 의하여 감소하였고 천일건조 시 검출되지 않았던 maltose가 열풍건조에 정량되었으며 증숙 후 열풍건조 시 1.67%의 높은 함량을 보여주었다. 씀바귀뿌리 내에 함유되어있는 유리아미노산함량 중 arginine이 669.2 mg%으로 가장 높았고 뒤이어 serine이 379.9 mg%으로 높은 함량을 보여주었다. 씀바귀뿌리 건조분말의 색도는 열풍건조 후 볶음처리를 한 것이 밝기, 적색도 및 황색도 모두 가장 높았으나 열수침출 후의 색도는 적색도와 황색도는 타처리구에 비하여 가장 높았지만 밝기는 가장 낮게 나타났다. 씀바귀뿌리를 이용한 침출차의 관능검사결과 열풍건조 후 볶음처리한 처리구가 가장 높은 점수를 보였다.

Keywords

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