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Food science and biotechnology v.14 no.5 = no.65, 2005년, pp.704 - 708   피인용횟수: 13

Distribution of poly-${\gamma}$-glutamate (${\gamma}$-PGA) producers in Korean fermented foods, Cheongkukjang, Doenjang, and Kochujang

Kang, Seong-Eun   (Food & Life Sci. Major, Kookmin UniversityUU0000250  ); Rhee, Joo-Hyung   (Food & Life Sci. Major, Kookmin UniversityUU0000250  ); Park, Chung   (BioLeaders Corp.  ); Sung, Moon-Hee   (Bio & Nano Chemistry Major, Kookmin University and BioLeaders Corp.UU0000250  ); Lee, In-Hyung   (Food & Life Sci. Major, Kookmin UniversityUU0000250  );
  • 초록

    Poly-y-glutamate ( ${\gamma}$ -PGA) has great potential as a biodegradable polymer in a broad range of industrial fields such as food, cosmetics, medicine and water treatment. In order to isolate ${\gamma}$ -PGA producers that are suitable for specific industrial applications, 653 Bacillus-like strains were isolated from 439 varieties of three Korean fermented foods, Cheongkukjang, Doenjang, and Kochujang, which were collected from different regions across Korea. A very high level of ${\gamma}$ -PGA production was demonstrated in 4.7%, 1.8%, and 3.0% of the Bacillus-like strains isolated from Cheongkukjang, Doenjang, and Kochujang samples, respectively, which produced a viscous substance to such extent that it overflowed to the lid of the plate on the glutamate-dependent ${\gamma}$ -PGA production plates. On glutamate-independent ${\gamma}$ -PGA production plates, 5.1%, 5.9%, and 6.1% of Bacillus-like strains isolated from Cheongkukjang, Doenjang, and Kochujang samples, respectively, showed high production. The maximum ${\gamma}$ -PGA production yields were 32.5 g/L and 5 g/L, depending on the purification methods in the glutamate-dependent media, with the higher yield resulting from a simple precipitation of ${\gamma}$ -PGA by either methanol or ethanol and dialysis. The viscous substance produced by each strain showed different morphological characteristics, suggesting that isolated ${\gamma}$ -PGA producers could produce various types of ${\gamma}$ -PGA.


  • 주제어

    poly- ${\gamma}$-glutamate ( ${\gamma}$-PGA) .   Bacillus sp.   .   Cheongkukjang .   Doenjang .   Kochujang.  

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  • 이 논문을 인용한 문헌 (13)

    1. Kim, Jong-Wook ; Kim, Yong-Suk ; Jeong, Pyeong-Hwa ; Kim, Hyung-Eun ; Shin, Dong-Hwa 2006. "Physicochemical Characteristics of Traditional Fermented Soybean Products Manufactured in Folk Villages of Sunchang Region" 한국식품위생안전성학회지 = Journal of food hygiene and safety, 21(4): 223~230     
    2. 2006. "" Food science and biotechnology, 15(2): 298~302     
    3. 2007. "" Food science and biotechnology, 16(5): 722~727     
    4. 2007. "" Food science and biotechnology, 16(4): 509~514     
    5. 2008. "" Food science and biotechnology, 17(6): 1279~1284     
    6. KIM, Dongha 2008. "Advanced Wastewater Treatment using Sludge Solubilization by the Cavitation and PGA addition" 上下水道學會誌 = Journal of Korean Society of Water and Wastewater, 22(4): 449~454     
    7. 2008. "" Food science and biotechnology, 17(1): 123~129     
    8. 2008. "" Food science and biotechnology, 17(1): 135~143     
    9. 2008. "" Food science and biotechnology, 17(1): 144~150     
    10. 2010. "" Nutrition research and practice, 4(1): 23~29     
    11. 2010. "" Journal of microbiology and biotechnology, 20(4): 803~808     
    12. 2011. "" Journal of food science and nutrition, 16(2): 150~156     
    13. 2014. "" Journal of applied biological chemistry, 57(2): 183~188     

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