Changes in Quality Characteristics of Traditional Kochujang Prepared with Apple and Persimmon during Fermentation

사과.감과실을 첨가한 고추장의 숙성중 성분 변화

Quality characteristics of kochujang prepared with appleand persimmon were investigated during 14 weeks of fermentation. The water activity decreased slightly during fermentation and was higher in kochujang (I) prepared with apple than in kochujang (II) prepared with presimmon. The reducing sugar contents increased from 10.95% in kochujang (I) and 10.30% in kochujang (II) to 16.68, 19.14% after 10 weeks of fermentation, respectively. The free sugar contents in kochujang (I) were maltose 10.55, glucose 8.47 and fructose, 3.02% after 12 weeks of fermentation. The free sugar content in kochujang (II) were maltose 10.55, glucose 21.65, glucose 8.71 and fructose 2.98 after 6 weeks of fermentation. The major free sugar in kochujang (I) and (II) was maltose. The organic acids detected in kochujangs were citric, malic, lactic and oxalic acids. The contents of citric acid and malic acid were higher than other acids in both kochujangs. The contents of total free amino acids were 187.59~420.94 mg% in kochujang (I) and 154.67~316.93 mg% in kochujang (II). The contents of aspartic acid, proline and glutamic acid were high in kochujang (I) and (II).

본 연구는 사과과즙 및 감을 부재료 로 첨가하여 고추장을 담금하고 이들 과실고추장의 숙성에 따른 성분 변화를 조사하였다. 수분활성도는 숙성기간이 경과함에 따라 감소하는 경향이었으며, 사과고추장이 감고추장보 다 수분활성도가 높았다. 환원당 함량응ㄴ 숙성 초기 사과고추장과 감고추장 각각 10.95, 10.30%에서 시간이 경과됨에 따라 증가하여 숙성 10주째에 각각 16.68, 19.14%로 최고치를 나태내었다. 유리당 성분으로 사과고추장은 숙성 12주째에 maltose 10.55%, glucose 8.47%, fructose 3.02%로 나타났으며, 감고추장은 숙성 6주째에 maltose 21.65%, glucose 8.71%, fructose 2.98%로 maltose 함량이 특이적으로 높았다. 유기산으로 citric acid, malic acid, lactic acid, oxalic acid가 검출되었으며, 2종의 과실고추장 모두 citric acid와 malic acid의 함량이 높았다. 과실고추장의 총 유리아미노산은 사과고추장에서 188.59~420.94mg%, 감고 추장에서 154.67~316.93 mg%로, 숙성 10~12주에서 최고치를 나타내었으며 aspartic acid, proline, glutamic acid 등의 함량이 비교적 높았다.