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논문 기본 정보

자료유형
학술저널
저자정보
Seval Dağbağlı (Ege University) Yekta Göksungur (Ege University)
저널정보
한국식품과학회 Food Science and Biotechnology Food Science and Biotechnology vol 18. no 6
발행연도
2009.12
수록면
1,342 - 1,350 (9page)

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This paper investigates the production and optimization of β-galactosidase enzyme using synthetic medium by Kluyveromyces lactis NRRL Y-8279 in stirred tank bioreactor. Response surface methodology was used to investigate the effects of fermentation parameters on β-galactosidase enzyme production. Maximum specific enzyme activity of 4,622.7 U/g was obtained at the optimum levels of process variables (aeration rate 2.21 vvm, agitation speed 173.4 rpm, initial sugar concentration 33.8 g/ℓ, incubation time 24.0 hr). The optimum temperature and pH of the β-galactosidase enzyme produced under optimized conditions were 37℃ and pH 7.0, respectively. The enzyme was stable over a pH range of 6.0-7.5 and a temperature range of 25-37℃. The K<SUB>m</SUB> and V<SUB>max</SUB> values for O-nitrophenol-β-D-galactopyranoside (ONPG) were 1.20 mM and 1,000 μ㏖/minㆍ㎎ protein, respectively. The response surface methodology was found to be useful in optimizing and determining the interactions among process variables in β-galactosidase enzyme production. Hence, this study fulfills the lack of using mathematical and statistical techniques in optimizing the β-galactosidase enzyme production in stirred tank bioreactor.

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Abstract
Introduction
Materials and Methods
Results and Discussion
Acknowledgments
References

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UCI(KEPA) : I410-ECN-0101-2013-573-000876218