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임채민,권선화,배명숙,정근옥,문숙희,박건영 대한암예방학회 2006 Journal of cancer prevention Vol.11 No.3
Characteristics and increased antimutagenic effects of black soybean chungkukjangs fermented by Bacillus subtilis were determined. Var. seoritae (large size black soybean) chungkukjang (SR-BSC) induced higher growth rate of total viable counts during the fermentation at 40oC for 3 days, and the fermentation pattern was almost same as typical chungkukjang fermented with var. hwangkeumkong soybeans. The NH2-N and NH3-N contents in SR-BSC were the same levels found in the var. hwangkeumkong soybean chungkukjang (HK-SC), but exhibited higher level of γ-GTP. Sensory evaluation test of SR-BSC also showed highest overall acceptibility. The mutagenicities induced by aflatoxin B1 (AFB1) and N-methyl-N'-nitro-N-nitrosoguanidine (MNNG) were significantly inhibited by the methanol extract of SR-BSC compared to typical chungkukjang prepared with var. hwangkeumkong soybean and var. seomoctae (small size black soybean) chungkukjang (SM-BSC). SR-BSC contained highest levels of isoflavones among the tested chungkukjangs. The contents and composition of various isoflavones of chungkukjang were evaluated. The total isoflavone contents of SR-BSC, SM-BSC and HK-SC were 3688.9, 698.6 and 2764.6μg/g, respectively. In SR-BSC, the levels of aglycones of genistein, daidzein and glycitein were 686.3, 346.6 and 45.6μg/g, respectively. (Cancer Prev Res 11, 218-224, 2006)
Bacillus subtilis로 제조한 검정콩 청국장의 항돌연변이 및 in Vitro 항암활성 증진효과
임채민,박순선,박건영 대한암예방학회 2007 Journal of cancer prevention Vol.12 No.2
Black soybean (Seoritae) chungkukjang was fermented with different kind of starters (Bacillus subtilis KCCM 11315, Bacillus licheniformis CN-115 and Bacillus megaterium SMY-212). Antimutagenic and in vitro anticancer effects of the black soybean chungkukjangs were studied by Ames test using Salmonella enterica serovar Typhimurium TA100 and 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT) assay on AGS human gastric adenocarcinoma cells and HT-29 human colon adenocarcinoma cells, respectively. The NH2-N and NH3-N contents in the black soybean chungkukjang fermented with Bacillus subtilis (BS-C) were similar levels in the soybean chungkukjang fermented with Bacillus licheniformis (BL-C). Methanol extracts from the black soybean chungkukjangs showed higher antimutagenicities against aflatoxin B1 (AFB1) and N-methyl-N'-nitro-N-nitrosoguanidine (MNNG). At the 2.5 mg/plate concentration, the BS-C exhibited 79% antimutagenicity against AFB1, while the black soybean chungkukjang fermented with Bacillus megaterium (BM-C) revealed 33% antimutagenicity. The BS-C and BL-C also increased antimutagenic effect against MNNG than BM-C. The BS-C and BL-C showed higher inhibitory effects on the growth of AGS human gastric adenocarcinoma cells than the BM-C at the same concentration. And the BS-C exhibited the highest inhibitory effects (76%) on the growth of HT-29 human colon adenocarcinoma cells among the fermented chungkukjangs (p<0.05). In this study, black soybean chungkukjang fermented with different kind of starters exerted differently on the antimutagenic and anticancer activities of the chungkukjangs. B. subtilis-fermented chungkukjang showed the highest chemopreventive effect compared to the chungkukjangs with other starters. (Cancer Prev Res 12, 120-127, 2007)
임채민,박장호,신영석 한국안전학회 2004 한국안전학회지 Vol.19 No.2
The effect of soil-structure interaction becomes important in the design of civil structures such as long-span bridges, which are constructed in the site composed of soft soil. Many methodologies have been developed to account for the proper consideration of soil-structure interaction effect. However, it is difficult to estimate soil-structure interaction effect accurately because of many uncertainties. This paper presents the results of study on soil-structure interaction and dynamic response of a long-span bridge designed in the site composed of soft soil. The effect of the soft soil was evaluated by the use of computer program SASSI and a long-span bridge structure was modeled by finite elements. Dynamic response characteristics of a long-span bridge considering soil-structure interaction were investigated.