• 한국미생물학회:학술대회논문집
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• 한국미생물학회 2005년도 International Meeting of the Microbiological Society of Korea
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• pp.73-75
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• 2005

• Nutrition Research and Practice
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• 제9권6호
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• pp.569-578
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• 2015

BACKGROUND/OBJECTIVES: Fermentation can increase functional compounds in fermented soybean products, thereby improving antioxidant and/or anti-inflammatory activities. We investigated the changes in the contents of phenolics and isoflavones, antioxidant activity and anti-inflammatory activity of Doenjang during fermentation and aging. MATERIALS/METHODS: Doenjang was made by inoculating Aspergillus oryzae and Bacillus licheniformis in soybeans, fermenting and aging for 1, 3, 6, 8, and 12 months (D1, D3, D6, D8, and D12). Doenjang was extracted using ethanol, and sequentially fractioned by hexane, dichloromethane (DM), ethylacetate (EA), n-butanol, and water. The contents of total phenolics, flavonoids and isoflavones, 2,2-diphenyl-1 picryl hydrazyl (DPPH) radical scavenging activity, and ferric reducing antioxidant power (FRAP) were measured. Anti-inflammatory effects in terms of nitric oxide (NO), prostaglandin (PG) E2 and pro-inflammatory cytokine production and inducible nitric oxide synthase (iNOS) and cyclooxygenase (COX)-2 expressions were also measured using LPS-treated RAW 264.7 macrophages. RESULTS: Total phenolic and flavonoid contents showed a gradual increase during fermentation and 6 months of aging and were sustained thereafter. DPPH radical scavenging activity and FRAP were increased by fermentation. FRAP was further increased by aging, but DPPH radical scavenging activity was not. Total isoflavone and glycoside contents decreased during fermentation and the aging process, while aglycone content and its proportion increased up to 3 or 6 months of aging and then showed a slow decrease. DM and EA fractions of Doenjang showed much higher total phenolic and flavonoid contents, and DPPH radical scavenging activity than the others. At $100{\mu}g/mL$, DM and EA fractions of D12 showed strongly suppressed NO production to 55.6% and 52.5% of control, respectively, and PGE2 production to 25.0% and 28.3% of control with inhibition of iNOS or COX-2 protein expression in macrophages. CONCLUSIONS: Twelve month-aged Doenjang has potent antioxidant and anti-inflammatory activities with high levels of phenolics and isoflavone aglycones, and can be used as a beneficial food for human health.

• 한국식품영양학회지
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• 제32권6호
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• pp.651-661
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• 2019

Suaeda asparagoides (Miq.) is a salt marsh plant, long been prescribed in traditional medicine for the treatment of hypertension and liver toxification in Asian countries. The powder of S. asparagoides was added at the ratio of 0, 5, and 10%, respectively, of grain-type Meju to manufacture Doenjang in brine according to the salt concentration (8 and 12%). After 24 weeks of fermentation, the Doenjang samples were determined to have an anti-inflammatory effect on RAW 264.7 cells. Evaluation of the anti-inflammatory effect of Doenjang added S. asparagoides powder extracted using 80% EtOH, was performed to study the inhibition of pro-inflammatory factors such as NF-κB (nuclar factor κB), NO (nitric oxide), TNF-α (tumor necrosis factor alpha), IL-6 (interleukin-6), iNOS (inducible nitric oxide synthase), and COX-2 (cyclooxygenase-2) in lipopolysaccharide (LPS)-induced RAW 264.7 cells. The results showed that the Doenjang extracts reduced the production of NO, IL-6, COX-2, and iNOS increased in the LPS-stimulated RAW cell without cytotoxicity. In the case of the NF-κB and TNF-α there was no significant difference between the control and samples. In conclusion, these results suggest that Doenjang added with the S. asparagoides powder acts as functional fermented food with anti-inflammation effect.

• 한국식품영양학회지
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• 제25권1호
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• pp.142-148
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• 2012

본 연구에서는 국내의 다양한 지역에서 판매 중인 22가지의 시판 된장을 구입하여 품질특성과 항산화 효과를 비교하고자 하였다. 먼저 pH, 염농도, 당도는 각각 4.61~6.36, 0.90~1.00 및 0.97~1.10%의 범위를 나타내었다. pH의 경우, 전남 지역의 된장이 가장 높게 나타났으며, 염도와 당도의 경우, 유의적인 차이는 나타나지 않았다(p>0.05). 된장 색도의 경우 L, a 및 b 값은 각각 52.92~55.00, 0.03~0.62 및 -0.74~2.70의 범위로 다양하게 나타났다. 총 폴리페놀 함량은 18.71~25.78 mg GAE/$m{\ell}$, DPPH 및 ABTS 라디칼 소거능은 각각 6.43~14.38 및 2.46~7.08 mg AE/$m{\ell}$를 나타내었다. 총 폴리페놀 함량은 경남 지역의 된장이 가장 높게 나타난 반면, 경북 지역의 된장이 가장 낮은 함량을 나타내었다. 그리고 DPPH 라디칼 소거능은 전남 지역의 된장이 가장 높은 활성을 나타내었고, 강원지역의 된장이 낮은 활성을 나타내었으며, ABTS 라디칼 소거능은 경기 지역과 경북 지역의 된장이 낮은 활성을 나타내었다. 이는 지역별 된장을 제조하기 위한 방법과 대두의 종류와 전분질 함량 그리고 된장의 발효조건 및 숙성기간의 차이 때문이라고 생각되며, 된장의 품질 및 기능성 향상을 위해 그리고 된장의 표준화를 위해 각각의 차이점에 대한 적절한 조건이 제시되어야 한다.

• 한국식생활문화학회지
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• 제16권4호
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• pp.316-322
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• 2001

This study was performed to investigate flavor modification effects of ${\beta}-cyclodextrin$ $({\beta}-CD)$ inclusion complex on the flavor of Doenjang (Korean traditional fermented soy paste) with various substitution levels of 10, 20, and 30%. Water and protein contents of the substituted samples showed significantly lower values compared to those of control(p<0.05). Results of DSC(Differential Scanning Calorimetry) showed that significantly higher ${\Delta}H$ values (386.03 and 304.23) in the 20 and 30% substituted samples represented the stabilized internal cell structures(p<0.05). Internal structures observed with the scanning electronic microscope tended to be less rough and organized making even and ordered internal cell structures as the substitution levels were increased. Results of sensory evaluation showed significantly higher savory flavor and significantly lower bitter and astringent flavors with the substituted samples compared to those of control(p<0.05). Results from this study showed the substitutions of ${\beta}-CD$ could possibly modify unfavored flavors of Doenjang while keeping the unique, nutritional and functional properties when ${\beta}-CD$ was used as a flavor modifier.

• Journal of Microbiology and Biotechnology
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• 제26권4호
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• pp.666-674
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• 2016

The bacterial strains were screened as potential starters for fermenting low-salt doenjang (a Korean traditional fermented soybean paste) using Korean doenjang based on proteolytic and antipathogenic activities under 6.5-7.5% NaCl conditions. Phylogenetic analysis based on 16S rRNA gene sequences showed that they all belonged to the genus Bacillus. Proteolytic and antipathogenic activities against Escherichia coli, Bacillus cereus, Staphylococcus aureus, Listeria monocytogenes, and Aspergillus flavus, as well as fibrinolytic, amylase, and cellulase activities of the 10 strains were quantitatively evaluated. Of these, strains D2-2, JJ-D34, and D12-5 were selected, based on their activities. The functional, phenotypic, and safety-related characteristics of these three strains were additionally investigated and strains D2-2 and D12-5, which lacked antibiotic resistance, were finally selected. Strains D2-2 and D12-5 produced poly-γ-glutamic acid and showed various enzyme activities, including α-glucosidase and β-glucosidase. Growth properties of strains D2-2 and D12-5 included wide temperature and pH ranges, growth in up to 16% NaCl, and weak anaerobic growth, suggesting that they facilitate low-salt doenjang fermentation. Strains D2-2 and D12-5 were not hemolytic, carried no toxin genes, and did not produce biogenic amines. These results suggest that strains D2-2 and D12-5 can serve as appropriate starter cultures for fermenting low-salt doenjang with high quality and safety.

• 한국식품저장유통학회지
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• 제10권2호
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• pp.213-218
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• 2003

재래식 된장의 품질을 고급화하기 위해 재래식 된장과 각종 한약제와 약초류를 달리 첨가하여 제조한 두 종류의 약용 된장들을 6개월간 숙성시키면서 성인병에 관련된 몇 가지 생리 기능성의 변화를 조사하였다 약용 된장들의 고혈압을 예방하는 엔지오텐신 전환효소(ACE) 저해활성은 숙성기간이 길어짐에 따라 급격히 감소하여 숙성 6개월 후에 39.0%∼51.7%을 보였고 혈전용해활성은 숙성 6개월후에 10.4∼11.3 U를 보였다. 약용 된장들의 전자공여능은 제조직후 95%∼97%을 보였고 숙성 기간이 길어짐에 따라 큰 변화가 없었으며 SOD 유사활성은 숙성 6개월 후에 모두 10% 내외를 보였다. 약용 된장(I)의 tyrosinase 저해활성은 숙성 기간이 길어짐에 따라 증가하여 숙성 6개월 후에 상온물 추출물에서 97.6%의 높은 활성을 보였다. 6개월 숙성된약용 된장들의 조단백질과 총당 함량은 각각 14%와 33%로 재래식 된장보다 높았다.

• 동아시아식생활학회지
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• 제15권1호
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• pp.11-19
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• 2005

This study was conducted to provide data on awareness and use of traditional foods, suggesting the desirable ways to succeed and develop traditional foods, and the possible direction of policies and applications for food industry. The study also aimed to figure out awareness of traditional food and dietary life behaviors of married women in order to offer or draw attention to new information for better healthy life styles. Five hundred and ten married women in parts of Seoul and Kyongki area were surveyed to figure out their awareness and use of traditional foods including some of fermented foods, such as Kimchi, Doenjang(soybean paste), and Gochujang(hot pepper paste). The results were summarized as follows. First the overall satisfaction degree with traditional foods reached as high as 74.4%. They preferred traditional foods because they are healthy(38.8%), seasonally celebrated(29.9%), and well known for a variety of fermented foods(28%). Second, Kimchi, Doenjang and Gochujang, home-made or factory manufactured in an old-fashioned way, were preferred. Third, the most frequently cooked traditional foods were Kimchi Chigae and Doenjang Chigae. The most preferred cooking methods using Gochujang were Jorim(stewing) and Bokkeum(roasting). These results showed that Kimchi, Doenjang, and Gochujang were still used in cooking by married women in parts of Seoul and kyongki area, which says those are still the traditional foods most of women think as important and essential. The producers of traditional foods have to consider the safety and improvement of taste and quality of ingredients in addition to the convenience in cooking, More researches should be conducted to enhance these aspects and to develop functional foods to satisfy various needs of consumers and to improve their health.

• 한국식품영양과학회지
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• 제33권5호
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• pp.875-879
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• 2004

생된장에 다시마, 미역 및 멸치를 건조분말상태로 1% 첨가하여 90일간 숙성시킨 후 제품의 품질특성 및 관능특성에 대하여 조사하였다. 일반성분은 수분은 전반적으로 48.7∼50.8%로 큰 차이가 없었고, 숙성 후 저장중에는 해조분말 첨가된장의 수분 유지력이 우수한 것으로 나타났다. 조단백질은 멸치 첨가시 상대적으로 높은 함량을 보였으며, 해조류첨가 시 또는 다시 마와 멸치분말 혼합 첨가시에 탄수화물 함량이 증가됨을 알 수 있었다. 각 된장의 지방 함량은 멸치분말 첨가 된장이 상대적으로 높게 나타났고, 회분은 15% 정도로 거의 차이가 없었다. 각 된장의 pH, 총산도는 미미한 차이를 보였으며 환원당은 다시 마와 멸치분말 혼합 첨가 된장에서 데조구 6.0%에 비하여 9.4%로 매우 높게 나타났다. 아미노산성 질소는 멸치 첨가 된장이 618.7 mg%로 대조구의 531.1 mg%보다 높게 나타났다. 색도와 관능 평가의 경우 밝기 즉 L값으로 인해 기호성이 다르게 나타났는데, 관능적으로 더 밝은 색을 띠는 다시마와 멸치분말 첨가 된장이 대조구나 미역분말 첨가 된장보다 관능적으로 높은 점수를 얻었으며, 전체적인 기호도는 다시마와 멸치분말 첨가 된장의 기호도가 상대적으로 높은 것으로 평가되었다.

• 한국식품과학회지
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• 제43권3호
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• pp.361-368
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• 2011

발아 대두 및 발아 검정콩의 첨가에 따른 된장의 품질 특성에 미치는 영향을 알아보기 위하여 발아 대두 및 발아 대두와 발아 검정콩을 7:3의 비율로 혼합하여 만든 메주를 이용하여 된장을 제조하였다. 대조구로는 발아하지 않은 대두로 발효한 메주를 이용하여 대두된장을 제조하여, $25^{\circ}C$에서 90일간 발효시켰다. 된장의 수분, pH, 염도와 같은 이화학적 특성은 모든 처리구에서 발효기간에 따라 유사한 경향으로 변화하여, 발효 90일 각각 $53.78{\pm}0.22-57.99{\pm}0.11%$, $6.01{\pm}0.01-6.72{\pm}0.01$, 그리고 $14.17{\pm}0.06-15.03{\pm}0.21%$를 나타내었다. 아미노태 질소 및 아미노산 함량은 발아검정콩된장에서 발효 90일 각각 $1256.21{\pm}1.86$, 994.46 mg%로 유의적인 차이(p<0.05)를 보이며 높게 나타났다. 발효 90일된 된장의 관능평가를 실시한 결과 발아대두된장에서 색과 맛 등의 항목에서 기호도가 높게 평가되었으며, 전반적 기호도에서 대두된장에 비하여 발아대두된장 및 발아검정콩된장의 관능적 특성이 우수한 것을 확인하였다. 연구결과로부터 발아 대두 및 검정콩을 첨가하여 제조한 된장은 발아하지 않은 대두를 이용하여 제조한 된장과 이화학 및 효소화학적 특성에는 차이가 없으나 아미노태 질소 및 아미노산 함량이 높고 관능적 특성이 우수한 된장을 제조할 수 있을 것으로 생각된다.