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논문 기본 정보

자료유형
학술저널
저자정보
Soo-Myung Oh (Keimyung University) Eun-Kyung Jang (Keimyung University) Ji-Hyun Seo (Keimyung University) Mi-Jin Ryu (Keimyung University) Sam-Pin Lee (Keimyung University)
저널정보
한국식품과학회 Food Science and Biotechnology Food Science and Biotechnology vol 16. no 4
발행연도
2007.8
수록면
509 - 514 (6page)

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초록· 키워드

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In this study, we optimized the production of γ-polyglutamic acid (PGA) in soybean milk cakes (SMC) fermented with Bacillus subtilis GT-D and B. subtilis KU-A, to be utilized as a functional food ingredient. PGA production was dependent upon the glutamate content, fermentation time, and type of Bacillus sp. The consistencies of the SMCs fermented by B. subtilis GT-D and B. subtilis KU-A were highest after 36 hr of fermentation, and then decreased gradually. The SMC fermented by B. subtilis KU-A had a higher consistency than the SMC fermented by B. subtilis GT-D. In the presence of 10% defatted soy flour (DFS), 5% glutamate in the SMC was efficiently converted into polyglutamic acid (PGA) for 24 hr, indicating a conversion yield above 96%, but its conversion then decreased with higher concentrations of glutamate. The soluble solid content (mucilage) of the SMC fermented with B. subtilis KU-A was 9.5%(w/w), and composed of 65.6% PGA (Mw 1,536 kDa) and some polysaccharides. However, the SMC fermented with B. subtilis GT-D had a mucilage content of 7.8%(w/w), and was composed of 66.4% PGA (Mw 1,409 kDa), 11.5% levan, and some polysaccharides. The viscoelastic values of the mucilage obtained using B. subtilis KU-A were much higher than those of mucilage obtained using B. subtilis GT-D. Also, the G’-value (elastic modulus) was higher than the G’’-value (viscous modulus).

목차

Abstract
Introduction
Materials and Methods
Results and Discussion
Acknowledgments
References

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UCI(KEPA) : I410-ECN-0101-2013-573-001023117