The purpose of this study was to investigate the quality characteristics and antioxidant activity by collecting four times on six samples of Jeonbuk regional soybean pastes (Doenjang) traditionally prepared for this study. The water content of samples decreased according to progress of the aging period and the water content of the fourth sample collected was 42.40~59.64% (p<0.05). The salinity of the fourth Doenjang samples was 11.80~18.60%. The amino-type nitrogen content was 122.67~540.33 mg% immediately after the preparation of Doenjang in the Jeonbuk region and the content of the fourth collection samples increased from 251.49 to 982.36 mg% (p<0.05). The isoflavone glycosides decreased but daidzein, genistein and glycitein, which are aglycones, increased during aging periods. The total polyphenol content of the fourth collected samples was 11.99~19.27 mg GAE/g (p<0.05). The DPPH radical scavenging activity, ABTS radical scavenging activity and FARP of the fourth Doenjang samples were 51.88~81.21%, 84.14~90.32%, and 1.08~3.11 mg Trolox/g, respectively. As a result of quality analysis on Doenjang, the superiority of traditional Doenjang has been proven by the increase of amino nitrogen content and antioxidant activity according to the aging period. However, factor analysis on quality differences of regional Doenjang should be conducted to ensure standardization and quality improvement.

This study examined the manufacturing characteristics of sweet potato doenjang in order to gain a more efficient use of the sweet potato. Sweet potato(Sinwhangmi, Sinjami) koji(mixed sweet potato paste and soybean powder in a ratio of 1:1) was cultured with Aspergillus oryzae KCCM 11372 at 35℃ for 48 h. Sweet potato doenjang was fermented for 60 days using a sweet potato koji(20%, 45%) and steamed soybean(70%, 45%), with salt accounting for 10%. The glutamic acid content was determined to be much higher in sweet potato doenjang using Sinwhangmi koji(45%) and steamed soybean (45%), than that of general doenjang. The DPPH radical scavenging activity has the largest EC₅₀(0.9 ㎎) in sweet potato doenjang using Sinjami potatoes 45%. Sensory evaluation indicated a good preference for sweet potato doenjang using Sinwhangmi(45%) and steamed soybean(45%).

본 연구에서는 재래 방법에 따라 생산되고 있는 전통발효식품(된장, 간장, 고추장)에 함유되어 있는 Ochratoxin A(OT-A) 를 면역학적 정량분석법인 Enzyme-Linked Immunosorbent Assay (ELl SA)와 Chemiluminescence Immunoassay(CIA)법을 개발하여 훈석하였다. 각 가정에서 생산하여 소비되는 장류(된장 13종. 간장 12종. 고추장 14종)와 채래척언 방법으로 생산하여 국 내시장에서 유통되고 있는 장류(된장 17종, 간장 11총)로 나누어 분석올 실시하였다.OT-A 흘 정량 조사한 표준독션의 작성 결과 CIA나 ELISA 모두 sensiti까ty는 20 pg/assay 이었으며, 본 실험에서 사용한 면역분석법의 OT-A 회수율은 90% 이상이었다.OT-A 의 잔존량은 가정에서 생산하여 소비되는 시료의 경우 된장 7.1 :t 3.7 ng/g, 간장 2. l:t 2.6 ng/g 그리고 고추장이 4.0 :t 1.9 ng/g 이었으며, 반면 재래시장에 유통되고 있는 시료의 경우 된장이 비교척 잔존량이 높은 22.5 :t 14.0 ng/g, 간장이 16.9:t 4.1 ng/g으로 나타나 가정에서 생산되고 있는 전통발효식품의 경우 OT-A의 오염도가 아주 낮은 것으로 나타났다. 한편 OT-A 의 가옐안정생 시험에서는 60, 90, 121 "c 에서 120 분까지 가열 처리하여 OT-A의 잔존량올 조사하였던 바 121 "c 의 고압처리(1 20 min)에서도 안정하였다.