• Title, Summary, Keyword: Cheonggukjang

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Antioxidant Effects of Cheonggukjang Containing Phellinus linteus Extract

  • Jiang, Cheng-Kui;Jeong, Kyu-Jae;Park, Dong-Ki;Paik, Hyun-Dong;Yoon, Yoh-Chang;Lee, Si-Kyung
    • Food Science and Biotechnology
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    • v.17 no.1
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    • pp.85-89
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    • 2008
  • This study was carried out to examine the antioxidant effects of cheonggukjang combined with Phellinus linteus extract. The electron-donating activity (EDA) of cheonggukjang containing 0.3% P. linteus extract (0.3% CPLE) was higher than that of cheonggukjang only. EDA of the ethanol extract from cheonggukjang was higher than that of the water extract. The water and the ethanol extracts showed strong antioxidant activity with regard to peroxide value. However, the ethanol extract showed a higher peroxide value than the water extract. The nitrite scavenging activity of the ethanol extract was greater than that of the water extract, crresponding to the EDA and peroxide values for each extract. Therefore, the antioxidant effects were enhanced by adding 0.3% of extract from P. linteus in manufacturing cheonggukjang. It is suggested that P. linteus extract could be put into practice as an effective antioxidant agent.

Changes in Quality Characteristics of Cheonggukjang added with Quinoa during Fermentation Period (퀴노아를 첨가한 청국장의 발효기간에 따른 품질 변화)

  • Lee, Jong Suk;Lee, Mi Hee;Kim, Jung Mi
    • The Korean Journal of Food And Nutrition
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    • v.31 no.1
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    • pp.24-32
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    • 2018
  • In this study, the quality characteristics of cheonggukjang with addition of different quinoa were investigated. We evaluated the quality and sensory characteristics of cheonggukjang, including the pH, amino nitrogen, slime contents, color value, and total aerobic bacteria. Moreover, The anti-oxidant activities were measured as total polyphenol content, 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity, and superoxide dismutase (SOD) activity. The pH and amino nitrogen content were noted to significantly increase during the fermentation period in all the samples. The slime content of cheonggukjang added with quinoa increased with increased fermentation time, but cheonggukjang with addition of 20% of quinoa was decreased. The L value and b value decreased significantly with increased fermentation time, but the a value increased significantly. The microbial tests of cheonggukjang with addition of quinoa showed that the aerobic micro-organisms count was 7.45~9.10 Log cfu/g. Total polyphenol contents increased in all groups during the fermentation period, and activity increased with an increased percentage of added quinoa. The DPPH radical scavenging activity and SOD-like activity of cheonggukjang (with addition of quinoa) were also significantly higher than those of the control. The sensory quality of quinoa 10% cheonggukjang was stronger in flavor, and taste, and demonstrated a higher level of overall acceptability, when compared to the other groups.

Quality Characteristics and Acceptability of Curried Rice with Cheonggukjang Powder for Development of High School FoodService Menu (고등학교 급식메뉴 개발을 위한 청국장 분말 첨가 카레라이스의 품질특성 및 수응도 평가)

  • Jung, Mi-Hee;Lee, In-Seon;Kim, Hyang-Sook
    • Korean journal of food and cookery science
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    • v.26 no.3
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    • pp.290-299
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    • 2010
  • The purpose of this study was to investigate the quality characteristics and acceptability of curried rice containing cheonggukjang powder for the using in a high school foodservice menu. The viscosity of the curry sauce with cheonggukjang powder was not significantly different between the control and 15% sample group. As the level of cheonggukjang powder was increased, the Hunter's L value increased, whereas the a value decreased. In the results of the acceptance test, the 15% group was not significantly different from the control group. Therefore, the 15% group was selected based on the acceptance test for use by the school foodservice industry. There was no significant difference between boys and girls (p<0.01) in the acceptance test of curried rice with cheonggukjang powder in terms of flavor, color, aroma, density of sauce, overall acceptability. In regards to the reason why boys and girls did not consume the curried rice, 'because of unfavorable taste' (51.0%), ranked highest followed by 'because of other' (34.2%). In conclusion, there was a high food acceptance food when cheonggukjang powder was added to curried rice. Also, it is necessary to increase the preference and consumption of cheonggukjang foods and through the development of proper recipes that contain cheonggukjang and through combination with other food ingredients.

Quality Characteristics of Various Bean Varieties Fermented with Bacillus subtilis (Bacillus subtilis에 의해 발효된 다양한 콩의 품질 특성)

  • Kim, Keehyuk;Lee, Gyuhee
    • Korean journal of food and cookery science
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    • v.32 no.5
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    • pp.541-548
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    • 2016
  • Purpose: For dissecting the possible benefits and usages of Cheonggukjang, five different beans, soybean, black soybean, red bean, chickpea, and lentil bean, underwent the fermentation process along with Bacillus subtilis. Methods: Resultant Cheonggukjang physicochemical and sensory properties such as pH, amino type nitrogen, slime contents, rheological properties, and sensory strength and consumer acceptance were analyzed. Results: Values of pH were found to be highest in Cheonggukjang made with soybean (SC), followed by Cheonggukjang made with black bean (BSC) and Cheonggukjang made with red bean and soybean mixture (RBSC), and lastly Cheonggukjang made with chickpea (CBC) and lentil bean (LBC). Amino type nitrogen values were shown to be highest in SC with a value of $394.74{\pm}28.80mg%$, subsequently were values taken from RBSC, followed by BSC, CBC, and lastly LBC. Slime contents were the highest in SC with a value of $3.44{\pm}0.36%$, with RBSC, BSC, CBC, and LBC without statistical difference. Total colony count was found to show higher value in BSC, SC, and RBSC, in contrast to the lower values found in CBC and LBC. Color was shown to be lightest in CBC and with darker shades shown that of SC, LBC, RBSC, and BSC in descending order. In rheological properties, hardness, adhesiveness, and viscosity were found to be highest in SC. Sensory strength analysis and sticky appearance were highest in SC, with fermented odor being lowest in CBC and BSC. The strength of sweetness, sourness, and umami taste did not show statistical difference, however, bitterness was shown to be highest in LBC and lowest in CBC, SC, and BSC. In the consumer acceptance test, overall acceptance was highest in SC and CBC. Conclusion: In conclusion, SC was found to be the best bean variety for making Cheonggukjang fermented with Bacillus subtilis, however, CBC may act as an alternative for manufacture of Cheonggukjang resulting in sound consumer acceptance.

The Characteristics of Cheonggukjang, a Fermented Soybean Product, by the Degree of Germination of Raw Soybeans

  • Choi, Ung-Kyu;Kim, Mi-Hyang;Lee, Nan-Hee;Jeong, Yeon-Shin;Kwon, O-Jun;Kim, Young-Chan;Hwang, Young-Hyun
    • Food Science and Biotechnology
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    • v.16 no.5
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    • pp.734-739
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    • 2007
  • This study was conducted to observe the quality characteristics of cheonggukjang fermented with new small-seed soybeans ('Agakong') according to the degree of germination of the raw soybeans. The sprouting rate was $8.6{\pm}5.6%$ after 12 hr of germination, but at 24 hr it increased rapidly to $85.4{\pm}4.7%$. We confirmed that the total isoflavone content immediately after soaking was 273.9 mg%, which was at least 3 times greater than for common soybeans; content increased at the start of germination, and increased to 338.4 mg% by 24 hr of germination, but then decreased. The quantity of viscous substance of the cheonggukjang increased in proportion to the degree of germination of the raw soybeans. The levels of amino acids in the cheonggukjang made from non-germinated soybeans, and soybeans germinated 48 hr, were 12.45 and 10.06%, respectively. The isoflavone levels in the cheonggukjang were determined by the degree of germination of the raw soybeans. There were no significant differences between the odor, sweet taste, savory taste, bitter taste, and overall acceptability of the cheonggukjang with different germination times of 0 to 36 hr.

Effects of Herbal-cheonggukjang on Serum Cholesterol Levels in Rats (생약초 청국장이 흰쥐의 혈중 콜레스테롤 함량에 미치는 영향)

  • Kim, Hyung-Woo;Cho, Su-Jin;Kim, Bu-Yeo;Jung, Sun;Park, Jung-Suk;Lee, Sook-Young;Cho, Su-In
    • The Korea Journal of Herbology
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    • v.23 no.1
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    • pp.17-22
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    • 2008
  • Ojectives : Cheonggukjang(natto) is known to have anti-hyperlipidemic action. This study was designed to investigate whether Herbal-cheonggukjang (HC, Herbal-natto) is more effective than cheonggukjang only, Methods : We investigated anti-hyperlipidemic effects of HC in hyperlipidemic rats induced by high-fat diet in terms of observation on levels of total cholesterol, HDL-cholesterol and triglyceride in serum. HC was made by cheonggukjang added Codonopsis Lanceolata, Houttuynia cordata and Lentinus edodes in indicated concetrations. Results : In this experiment, hyperlipidemic rats showed elevated levels of total cholesterol and triglyceride, and also showed lowered level of HDL-cholesterol. Oral administration of HC decreased levels of total cholesterol and triglyceride, Cheonggukjang(natto) did not affect levels of total cholesterol, HDL cholesterol and triglyceride. Conclusions : In these results, oral administration of HC decreased total cholesterol and triglyceride effectively. These results demonstrate that HC is useful to modulate cholesterol and triglyceride in serum.

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Succinyl Daidzin and Succinyl Genistin are New Isoflavone Derivatives Found in Cheonggukjang

  • Yang, Seung-Ok;Lee, Seung-Wook;Park, Young-Woo;Lee, Sang-Jun;Chang, Pahn-Shick;Choi, Sung-Seen;Lee, Jae-Hwan
    • Food Science and Biotechnology
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    • v.17 no.1
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    • pp.172-175
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    • 2008
  • Two new fermentation products were separated from cheonggukjang by high performance liquid chromatography (HPLC) and tentatively identified as succinyl daidzin and succinyl genistin by HPLC-mass spectrometry (MS). Both succinyl daidzin and succinyl genistin were detected in all 4 commercially available and one laboratory prepared cheonggukjang and 1 commercially available natto. However, these compounds were not detected in commercially available 4 home-made and 4 factory-produced doenjang. Peak areas of succinyl genistin were about 1.95-2.45 times higher than those of succinyl daidzin in cheonggukjang, which may be due to the higher concentration of genistin derivatives than daidzin derivatives in soybeans. This is the first report on the succinyl derivatives as isoflavone metabolites from cheonggukjang and these 2 isoflavone derivatives could be characteristic indicators for cheonggukjang.

Changes in the Physicochemical Characteristics and the Antioxidative Activity of Cheonggukjang by Addition of Walnut (호두 첨가에 따른 청국장의 이화학적 특성 및 항산화능 변화)

  • Park, Hwa-Young;Ryu, Beom-Seok;Choi, Ung-Kyu
    • The Korean Journal of Food And Nutrition
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    • v.28 no.6
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    • pp.1004-1010
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    • 2015
  • This study was conducted to investigate the changes in the physicochemical characteristics and antioxidant activity of cheonggukjang with the addition of walnuts. The pH of cheonggukjang did not change significantly with the addition of walnut. But the water content decreased significantly. Walnut addition to the soybean was expected to have a positive effect because the number of Bacillus subtilis was not reduced. The viscous substance content was significantly decreased when more than 20% of walnut was added to cheonggukjang. The addition of walnut made the color darker. The flavonoid and polyphenol content was sharply increased in proportion to the walnut addition and the DPPH radical scavenging activity of cheonggukjang also increased. Altogether, it was found that the addition of walnut had a positive influence on the cheonggukjang by increasing the antioxidant activity.

Isolation, Identification, and Fermentation Characteristics of Bacillus sp. with High Protease Activity from Traditional Cheonggukjang (전통 청국장으로부터 protease 분비능이 우수한 Bacillus sp. 균주의 분리 동정 및 발효 특성)

  • Ahn, Yong-Sun;Kim, Yong-Suk;Shin, Dong-Hwa
    • Korean Journal of Food Science and Technology
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    • v.38 no.1
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    • pp.82-87
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    • 2006
  • Twenty one strains strongly producing protease were isolated from Korean traditional Cheonggukjang. Eight strains selected by sensory evaluation on Cheonggukjang prepared with isolated strains were identified with based on biochemical properties a and 16S rDNA sequencing. Identified strains were Bacillus subtilis MB4, and Bacillus amyloliquefaciens A1, A2, B1, MC1, SB2, SC1, and SD1. Protease activities, important strain selection factor, were higher in Cheongjukjang prepared with B. subtilis MB4 (179.6 Unit) and B. amyloliquefaciens SB2 (201.9 Unit) than commercial traditional Cheonggukjang (97.9 Unit). Sensory evaluation revealed Cheonggukjang prepared with B. subtilis MB4 had flavor very similar to commercial traditional Cheonggukjang. Cheonggukjang prepared with B. suhtilis MB4 (0.0006 Pa s) and commercial traditional Cheonggukjang (0.0002 Pa s) revealed lower viscosities than those of Cheonggukjang prepared with B. amyloliquefaciens SB2, MC1, B1, A1, SD1, A2, and SC1 (0.006 to 0.008 Pa s at 1001/s. Results show Cheonggukjang could be prepared using single strain of B. subtilis MB4, maintaining high protease activity and very similar sensory and viscosity qualities with those of commercial traditional Cheonggukjang.

Effects of Germination Time of Soybeans on Quality Characteristics of Cheonggukjang Fermented with an Isolated Bacterial Strain (대두의 발아시간이 분리 균주로 제조한 청국장의 품질 특성에 미치는 영향)

  • Jung, Jin-Bo;Choi, Seung-Kwon;Jeong, Do-Youn;Kim, Young-Soo;Kim, Yong-Suk
    • Korean Journal of Food Science and Technology
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    • v.44 no.1
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    • pp.69-75
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    • 2012
  • To investigate the effects of soybean germination time on the quality of cheonggukjang, the physicochemical characteristics and enzyme activities of cheonggukjang during fermentation were compared. B. subtilis SCD 115035 strain isolated from traditional cheonggukjang was selected for making cheonggukjang. Germinated (12-h) soybeancheonggukjang produced the highest amount of viscous substance (13.22%) after 48 h of fermentation, and the contents were inversely proportional to the germination time of the soybeans. The acidic- and neutral-protease activities of ungerminated soybean-cheonggukjang were higher than those of germinated soybean-cheonggukjang. The amino nitrogen content of ungerminated soybean-cheonggukjang was the highest (436.93 mg%) at 48 h of fermentation, and its content was similar to that of 12-h germinated soybean-cheonggukjang. However, the total isoflavone content of 36-h germinated soybean-cheonggukjang was the highest after 72 h of fermentation, and its content was higher than those of cheonggukjang made from soybeans germinated for 0, 12, and 24 h.