Physico-chemical Changes of Commercial Ssamjang during Storage

공장식 쌈장의 저장기간에 따른 이화학적 성분변화

  • Published : 2005.06.30

Abstract

Physico-chemical properties of ssamjang prepared by industrial process were investigated. Overall experiments were planned by central composite design for five independent variables, kochujang mash aging period $(X_{1})$, doenjang aging period $(X_{2})$, doenjang content $(X_{3})$, sterilization temperature $(X_{4})$, and storage temperature $(X_{5})$. Storage period had no consistent effect on moisture content of ssamjang. Doenjang having longer aging period showed lower moisture content than that having shorter aging period. Titratable acidity and pH of ssamjang gradually increased and decreased with storage period, respectively, with pH of ssamjang significantly affected by aging period of doenjang and kochujang mashes, and sterilization and storage temperatures. Amino nitrogen contents of ssamjang increased during storage and were more affected by sterilization temperature than by aging period and content of doenjang, and storage temperature. Crude protein content of ssamjang irregularly changed during storage, and was slightly affected by content of doenjang.

공장식 쌈장 제조의 주원료인 된장과 고추장 반제품은 숙성기간이 경과함에 따라 수분함량과 아미노산성질소는 증가하였으며, pH는 낮아졌다. NaCl과 총질소함량에 있어서는 유의적인 차이는 없었으며 ${\alpha}$-amylase역가는 숙성 10일째 가장 높은 활성을 보였고 pretense의 활성은 숙성초기에 높은 활성을 나타냈다. 쌈장의 저장과정 중 수분함량은 경시적인 증감양상을 보였으며, 된장의 숙성기간이 긴 시험구가 수분함량이 낮게 나타났다. 저장기간이 경과하면서 pH는 시험구별로 점차 낮아지고 적정산도는 높아지는 경향을 보였으며, 된장과 고추장 반제품의 숙성일수, 살균온도, 저장온도에 따라 유의적인 차이가 있었다. 조단백질의 함량 변화는 일정하지 않았으며 된장의 함량에 따라 약간의 차이를 보였다. 저장기간이 경과함에 따라 아미노산질소는 증가하는 경향을 나타냈고, 고추장 반제품과 된장의 숙성기간, 된장 함량 및 저장온도보다는 살균온도에 의해 아미노산성질소 함량이 유의적인 차이를 보였다.

Keywords

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