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 Low Salt Kalopanax pictus Shoot Jangajji Using Soybean Sauce

저염 개두릅 장아찌의 품질 특성

  • Lee, Shin-Ho (Department of Food Service & Technology, Catholic University of Daegu) ;
  • Kang, Kyoung-Myoung (Department of Food Service & Technology, Catholic University of Daegu)
  • 이신호 (대구가톨릭대학교 식품가공학과) ;
  • 강경명 (대구가톨릭대학교 식품가공학과)
  • Received : 2014.09.23
  • Accepted : 2014.12.31
  • Published : 2015.01.31
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Abstract

In order to develop new Kalopanax pictus shoot Jangajji (KJ) with low salt concentration, physicochemical changes of KJ soaked at different concentration of soybean sauce (10~50%) were investigated for 50 days. The pH of KJ increased significantly with increasing concentration of soybean sauce in soaking solution (P<0.05). Titratable acidity and NaCl concentration of all KJ increased during storage for 50 days at $10^{\circ}C$. The total bacterial count slowly increased during early storage time and reached its highest level (4.74 log CFU/g) after storage for 30 days. KJ-20 (KJ added with 20% soy sauce) showed the highest scores for taste, flavor, texture, and overall acceptability. The total polyphenol and flavonoid contents of KJ extract increased with increasing concentration of soybean sauce. DPPH and ABTS radical scavenging activities of KJ extract were 27.22% and 38.37% (control), 40.74% and 43.65% (KJ-10), 41.79% and 50.37% (KJ-20), 43.09% and 52.60% (KJ-30), 48.62% and 53.45% (KJ-40), and 50.85% and 60.79% (KJ-50), respectively.

전통발효식품의 저염화 가능성을 검토하고자 설탕 및 식초를 첨가한 간장 농도를 달리한 침지액를 이용하여 제조한 개두릅 장아찌의 숙성 중 품질 특성을 조사하였다. pH 변화는 숙성 초기 pH 3.82를 나타내었으며, 간장 농도가 증가할수록 처리군 간의 pH는 유의적으로 높았다. 숙성기간에 따른 pH의 변화는 숙성 20일까지 증가하여 pH 4.02~4.41을 나타내었고 이후 점차 감소하는 경향을 나타내었다. 적정산도의 변화는 pH의 변화와 유사한 결과를 나타내었다. 염도는 간장 농도와 숙성기간이 증가함에 따라 개두릅 자체의 염도는 증가되는 경향을 나타내었고, 이후 서서히 증가하여 숙성 50일째 각각 0.95%(대조군), 1.30%(KJ-10), 2.30%(KJ-20), 2.87%(KJ-30), 3.33%(KJ-40), 3.67%(KJ-50)를 나타내었다. 총균수는 숙성 과정 중 2.85~4.74 Log CFU/g의 범위를 나타내었고, 대장균군수는 숙성 20일 이후부터 검출되지 않았다. 관능검사 결과 KJ-20이 색을 제외한 모든 항목에서 가장 높았다. 개두릅 장아찌 추출물의 polyphenol 및 flavonoid 함량은 간장 농도가 증가할수록 증가하였고, DPPH와 ABTS radical 소거능은 각각 대조군이 27.22%, 38.37%, KJ-10이 40.74%, 43.65%, KJ-20이 41.79%, 50.37%, KJ-30이 43.09%, 52.60%, KJ-40이 48.62%, 53.45%, KJ-50이 50.85%, 60.79%를 나타내었다.

Keywords

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