• 제목/요약/키워드: Meju Doenjang

검색결과 86건 처리시간 0.028초

메주 유래의 B. subtilis SCB-3으로 제조된 된장의 Angiotensin I Converting Enzyme 저해효과 (Angiotensin I Converting Enzyme Inhibitory Effect of Doenjang Fermented by B. subtilis SCB-3 Isolated from JeJu, Korean Traditional Food)

  • 황종현
    • 한국식품영양과학회지
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    • 제26권5호
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    • pp.775-783
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    • 1997
  • Morphologically different 18 strains were isolated and examined for their abilities to inhibit ACE. Those strains were cultured in the medium containing 10% of soybean extract at 37$^{\circ}C$ for 48hr or fermented with boiled soybean at 3$0^{\circ}C$ for 60 days. The concentration of inhibitors to inhibit 50% of ACE activity, $IC_{50}$ was measured on the culture broth of each strain and also on the hot-water extract from 20, 40 and 60 day fermented Doenjang by each strain. As a result, SCB-3 which is isolated from Meju showed the highest ACE inhibitoryactivity on the cultured broth and 40 day matured Doenjang. Then, $IC_{50}$ of SCB-3 was 0.02 mg/ml and 0.26mg/ml respectively. SCB-3 was identified as a Bacillus subtilis based upon its morphological, biochemical and physiological properties. Changes in general components and ACE inhibitory activity of Doenjang fermented by SCB-3 were examined during 90 days. Total acidity of Doenjang was increased from 1.39% to 1.66% and pH was decreased from 6.02 to 5.79 after 90 days fermentation. Total sugar contents were decreased from 16.4% to 15.1% and reducing sugar contents was also decreased from 2.45% to 1.62%. Total nitrogen contents were nearly not changed, but amino nitrogen contents were drastically increased from 196mg% to 541mg%. The numbers of total microorganism were increased to 1.1$\times$$10^{8}$ cells/g after 45 days. Protease activity was increased to 622.1U/g after 75 days. The highest ACE inhibitory activity was shown in 60 day fermented Doenjang and $IC_{50}$ of the hot-water extract was 0.31mg/ml.

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제조방법과 숙성기간에 따른 된장의 향기특성 변화 (Changes in Odor Characteristics of Doenjang with Different Preparing Methods and Ripening Periods)

  • 최미경;손경희;전형주
    • 한국식생활문화학회지
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    • 제12권3호
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    • pp.265-274
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    • 1997
  • This study was conducted in ordor to find the most suitable conditions for producing the Doenjang with optimal odor compound contents. Three sample groups with the different preparing methods -Doenjang that has not gone through the soy sauce separation process (Doenjang A), Doenjang that has gone through the soy sauce separation process; Meju-20% salt water ratio of 1 : 4 (Doenjang B), and that with the ratio of 1.3 : 4 (Doenjang C)- were tested during different ripening periods. Odor compound contents were analyzed through Solvent Extraction Method and Simultaneous Steam Distillation Extraction (SDE). The number of odor compounds was greatest in Doenjang A and during the mid to late stage in each groups. In the sensory evaluation of Doenjang odors, Doenjang A received the highest scores in the categories of overall preferences, while Doenjang C got the lowest scores. Individual odor didn't vary significantly during ripening periods, but the overall odor and taste preference was highest in the samples ripened for 75 to 120 days. Stepwise multiple regression analysis of major odor compounds of Doenjang revealed that benzeneacetaldehyde is the major explanatory variable for offensive odor. Benzeneethanol, 3-methylthio-propanal and 4-methyl-phenol are the explanatory variables for salty odor, nutty odor and rancid odor, respectively. Odor compounds that contribute to the overall odor preference varied from the compounds that affect the taste preference.

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Questionnaire Survey of the Methods Used in Household Doenjang Production in Korea

  • Ryu, So Young;Lee, Sang Yoo;Woo, So Young;Kang, Seung Yoon;Song, Jeonghun;Jeong, A-Yeong;Chun, Hyang Sook
    • 한국식생활문화학회지
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    • 제35권4호
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    • pp.342-350
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    • 2020
  • This study examined the methods used in household doenjang (Korean soybean paste) production. Nine hundred forty-three responses were obtained using a nationwide, questionnaire-based survey (2018-2019) with non-probabilistic snowballing sampling. Consistent with previous studies, the respondents were primarily over the age of 50 years (97.1%) and female (97.9%). In addition to soybeans, the most used ingredients were red pepper (85.8%) and charcoal (85.5%), which most respondents obtained through direct farming (50.4-59.9%). Seasonal production occurred later in the higher latitude regions (Gyeonggi-do, Gangwon-do, Chungcheong-do) (p < 0.01), which have lower average temperatures, and the fermentation period was shorter in the lower latitude regions (Jeolla-do, Gyeongsang-do, Jeju-do) (p < 0.01), which have higher average temperatures. There were no significant regional differences in the season when doenjang was made, with most production occurring during January and February (81.1%). Most respondents (71.3%) made doenjang using homemade meju (soybean block used as a starter) in a traditional way to allow the microorganisms to be naturally inoculated. These results could be used as a basis for future research on topics such as starter development, standardized production, and safety of household doenjang.

된장 제조를 위한 바로 사용 종균의 개발 (Development of Ready-to-use Starters for the Production of doenjang)

  • 이은진;허병석;이인형
    • 한국미생물·생명공학회지
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    • 제47권2호
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    • pp.234-241
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    • 2019
  • In Korea, traditional doenjang is manufactured using the conventional method at home and by small-scale enterprises. Because this age-old process depends on natural inoculation of various microorganisms, it is difficult to reproduce or maintain consistency in the final product quality across batches. Moreover, doenjang occasionally prepared by this method raises safety concerns related to aflatoxin, biogenic amine, and Bacillus cereus contamination. To develop starters that can be conveniently used at home or in small industry settings for the manufacturing of safe and flavor-improved doenjang, autochthonous microbe starters were developed in dried forms as ready-to-use starters. Each starter powder prepared by heat- or freeze-drying methods remained stable even after 24-week storage. These ready- to-use starter powders were successfully applied to lab-scale fermentation for the production of safe and flavor-improved doenjang. We believe that these ready-to-use starter powders will benefit small-scale enterprises in the manufacturing of doenjang of good reproducible quality.

Inhibitory Effect of Kochujang Extracts on Chemically Induced Mutagenesis

  • Kim, So-Ja;Jung, Keun-Ok;Park, Kun-Young
    • Preventive Nutrition and Food Science
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    • 제4권1호
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    • pp.38-42
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    • 1999
  • Antimutagenic effects of 5 kinds of kochujang(Korean red pepper soybean paste) samples compared with doenjang(Korean soy paste) were studied using the Ames test with Salmonella typhimurium TA100 and the SOS chromotest, with E. Coli PQ37. Th eantimutatenic effects of methanol extracts from red pepper powder and meju(fermented soybean) powder, the major ingredients of the kochujang,were also evaluated for the mutagenicity of aflatoxin B1 (AFB1) in the Ames assay. The methanol extracts from the kochujang samples showed lower antimutagenicities than those of doenjang against AFB1 and N-methyl-N'-nitro-N-nitrosoguanidine (MNNG) in the Ames assay. Traditional kochujang I and II exhibited strong antimutagenic activity against AFB1 and MNNG. The traditional kochujang samples against MNNG were aslo observed in the SOS chromotest system with the same fashions as shown in the Ames mutagenicity test. The methanol extracts from meju powder had the strongest inhibitory effects on mutabenicity induced by AFB1, however, those form red pepper powder showed lower inhibition rate than kochujang. These results suggest that traditional kochujang exhibit higher antimutagenic acitivity than the commercial variety, and that meju powder seems to be one of the major antimutagenic components in kochujang.

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균주를 달리한 된장의 발효기간에 따른 대두의 조직학적 변화에 관한 연구 (Histological Changes of Doenjang during the Fermentation with Different Strains)

  • 박정숙
    • 한국식품과학회지
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    • 제24권5호
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    • pp.477-481
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    • 1992
  • 품질이 좋은 된장을 제조하기 위한 연구의 일환으로 재래식 된장과 Aspergillus oryzae와 Bacillus natto를 혼합한 된장을 제조해서 발효기간에 따른 대두조직의 변화를 조사한 결과 가압, 가열처리에 의하여 세포벽이 붕괴되거나 ghost 상태를 보였고 표피부와 내부의 세포질은 원형질 분리가 현저한 차이가 있으며 protease에 의한 당단백 구상체의 융합과 amylase에 의하여 전분이 분해되어 작은 공포를 보였으며 발효에 의한 균침투 과정이 시일이 경과함에 따라 표피부에서 내부로 이행되어지며 Aspergillus oryzae와 Bacillus natto 혼합 된장의 표피부와 유세포에서 점질물이 보인다. 또한 발효시간이 경과함에 따라 염색성이 나빠지고 세포벽이 다각형으로 되는데 재래식 보다는 Aspergillus oryzae와 Bacillus natto 혼합구가 현저하였다.

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발효 대두 식품의 폴리페놀, 플라보노이드 함량과 다양한 측정 방법에 따른 항산화 활성 비교 (Total flavonoids and phenolics in fermented soy products and their effects on antioxidant activities determined by different assays.)

  • 박정우;이영진;윤선
    • 한국식생활문화학회지
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    • 제22권3호
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    • pp.353-358
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    • 2007
  • This study was conducted to compare the antioxidant activities of fermented soy products such as chungkukjang, meju and doenjang with soybeans. Total phenolic, flavonoids contents and antioxidative activities of the methanol extract of soy and fermented products were compared with specific reference to alpha-diphenyl-2-picryl-hydrozyl (DPPH) radicals scavenging effects, ferric /reducing power (FRAP), inhibition of conjugated diene formation and tyrosinase activities. Total phenolic and flavonoids contents increased in soybeans after fermentation. Fermented soy products also displayed enhanced antioxidative activities in comparison with the non-fermented soybeans. There were linear relationships between total phenolic and flavonoids contents and ferric reducing/antioxidant power of the samples. Overall, the fermented soy products showed a better antioxidant activity than soybeans. Among the 3 kinds of fermented soy products, chungkukjang, meju and deonjang, doenjang exhibited the highest levels of DPPH-free radicals scavenging activity, ferric /reducing power, inhibition of conjugated diene formation and tyrosinase activities. The fermented soy products with longer fermentation time demonstrated the higher antioxidant activities as well as higher total phenols and flavonoids in the order of doenjang > meju > chunghlkjang> soybeans.

메주 형태와 Starter 첨가에 따른 쌀된장의 품질특성 변화 (Quality Characteristics of Rice-doenjang during Fermentation by Differently Shaped Meju and Adding Starter)

  • 이선영;박나영;김지연;최혜선
    • 한국식품영양학회지
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    • 제25권3호
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    • pp.505-512
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    • 2012
  • 된장은 콩을 주원료로 한 우리나라의 대표적 발효, 숙성식품으로 식생활에서 주요 단백질 섭취원이자, 조미료로서 중요한 역할을 차지해왔다. 쌀된장은 쌀을 첨가한 전통된장으로 전통장류와 메주에서 분리한 효소활성 및 항균효과 우수균주 B. subtilis(HJ18-4), A. oryzae(MD05)를 starter로 이용하여, 흩임메주(Rice 1), disc형 메주(Rice 2), 일반육면체메주(Rice 3)로 제형을 달리한 쌀된장의 품질특성을 평가하였다. 발효기간에 따라 아미노태 질소, 암모니아태 질소, 환원당 함량, protease 활성, ${\alpha}$-amylase활성, 총 균수, 유산균수 변화를 측정하였다. 아미노태 질소 함량의 변화는 Rice 3이 21일까지 34.10~199.70 mg%로 급격히 증가하였으며, 암모니아태 질소함량은 다른 처리구에 비해 Rice 1이 639.29 mg%로 가장 높았다. 환원당 함량은 0.024~0.498%로 실험군별 큰 차이는 없었으며, 발효가 진행됨에 따라 증가하였다. Protease 활성은 Rice 2 및 3이 다른 처리구에 비해 95.55~95.92 unit/g으로 높았으며, 발효가 진행됨에 따라 증가하였다. ${\alpha}$-Amylase 활성은 Rice 2, 3이 발효 14일째 36.65~341.27 unti/g으로 급격한 증가를 보였다. 쌀된장의 숙성기간에 다른 총 균수 측정 결과 발효기간 동안 일정하였으며 Rice 1이 42일째 $4.2{\times}10^8$ CFU/g으로 가장 높은 총 균수를 나타내었다. 유산균수는 발효기간 동안 감소하는 경향을 보였다. 본 연구를 통해 B. subtillis와 A. oryzae를 접종하고, 메주 형태가 Rice 3(2,000 g, $20cm{\times}15cm{\times}5cm$)으로 제조 시 아미노태 질소, 암모니아태 질소 및 효소활성 측정 결과, 품질특성이 가장 좋았음을 알 수 있었다. 쌀된장의 숙성기간 동안 품질특성이 가장 좋은 Rice 3의 유기산과 유리아미노산 함량을 분석하였다. 유기산을 분석한 결과, citric, lactic, succinic, fumaric, malic acid가 동정되었다. 이들 유기산 중 citric acid과 lactic acid의 함량이 각각 1,190.1 및 517.28 mg/kg 순으로 가장 높았다. 유리아미노산 분석 결과, glutamic acid와 aspartic acid가 1,959.88 및 1,085.00 mg/100 g으로 함량이 가장 높았으며, leucine, lysine, valine 등의 순으로 함유되어 있었다. 본 연구결과로 효소활성이 우수한 균주로 활용된 쌀된장의 제조에 있어서 제형별 특징에 대한 기초자료를 제공하고자 하였다.

제조방법이 다양한 시판 재래 및 양조 간장의 관능적 특성 (Sensory Characteristics of Different Types of Commercial Soy Sauce)

  • 이다연;정서진;김광옥
    • 한국식생활문화학회지
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    • 제28권6호
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    • pp.640-650
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    • 2013
  • Soy sauce, a basic ingredient in Asian cuisine, is made of fermented soybeans, salt, water, and barley or wheat flour. The sensory characteristics of soy sauce are not only determined through its main ingredients but also by various flavor compounds produced during the fermentation process. This study was conducted to identify the sensory attributes of five different commercial soy sauce samples that differ in Meju types (traditional Meju or modified Meju) and usage types. Thirty three sensory attributes, including appearance (1), odor (16), flavor (14), and mouthfeel (2) attributes, were generated and evaluated by eight trained panelists. The collected data were analyzed by analysis of variance and principal component analysis. There were significant differences in the intensities of all sensory attributes among the soy sauce samples. Soy sauce made with traditional Meju had high intensity of fermented fish, beany, musty odors and salt, Cheonggukjang, fermented fish flavors. Whereas two soy sauces made with modified Meju were strong in alcohol, sweet, Doenjang, roasted soybean flavors. Two soy sauces for soup made with modified Meju had medium levels of briny, sulfury, fermented odors and bitter, chemical flavors and biting mouthfeel characteristic.

조선전통 식품으로 메주발효 (Meju Fermentation for a Raw Material of Korean Traditional Soy Products)

  • 이상선
    • 한국균학회지
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    • 제23권2호통권73호
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    • pp.161-175
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    • 1995
  • 메주는 간장과 된장의 원료로 우리나라의 식물성 단백질인 조선 전통식품으로 중요하다. 조선 전통식으로 농가에서 만들어진 23종류의 메주덩어리를 수거하여, 29종의 균과 한 종의 세균을 채집하여 동정하였다. 이러한 중에서 다만 몇개의 미생물만이 메주발효과정에 작용하는 것을 발견하였고, 나머지 미생물은 메주발효에서 잘못 발효로 일어나는 오염 미생물로 밝혀졌다. 메주발효과정에서는 물리적인 변화로 건조과정(수분활성도)과 열방생과정이 메주발효 중에 일어나며, 이러한 과정이 미생물(대부분의 경우 메주 표면에서는 균)의 천이를 유도시켜 메주의 생화학적인 변화를 유도하는 것으로 나타났다. 균의 천이 과정에서 수분이 많았을 때는 물곰팡이인 접합균이 첨 서식한 것이 발견되었으며, 메주발효를 유도하는 것으로 나타났다. 흰포자를 방출하는 Scopulariopsis brevicaulis는 메주표면에서 고초세균인 Bacillus megatrium와 함께 후기 발열반응과정에서 발견되고 있었다. 미생물들이 분비하는 단백질 분해효소에 관한 조사에서, 각각의 미생물들은 콩 단백질 분해에 서로 상호보안적인 역할을 하였다. 또한, 접합균들은 조선 전통의 메주발효과정에서 후기 메주발효를 유도하는 중요한 균으로 관찰되었다.

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