Applied Biological Chemistry
- 제39권3호
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- Pages.172-176
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- 1996
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- 2468-0834(pISSN)
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- 2468-0842(eISSN)
Candida parapsilosis 돌연변이주에 의한 Xylitol 생산조건의 최적화
Optimization of Culture Conditions for Xylitol Production by A Mutant of Candida parapsilosis
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Oh, Deok-Kun
(Department of Food Science and Technology, Woosuk University) ;
- Kim, Sang-Yong (Tong Yang Confectionery Co., R&D Center) ;
- Kim, Jung-Hoe (Department of Biological Sciences, Korea Advanced Institute of Science and Technology)
- 발행 : 1996.09.30
초록
Candida parapsilosis ATCC 22019 돌연변이주를 이용하여 xylitol 생산에 영향을 주는 배양 조건인 pH와 온도 그리고 교반속도 및 산소전달속도등의 환경인자가 Xylitol의 생성에 미치는 영향을 살펴보았다. 발효조에서 pH가 증가 할수록 균체농도와 기질소비속도가 증가하여 발효시간이 단축되었다. 그러나, Xylitol생산은 pH 4.5와 5.5에서 큰 차이 없이 50g/l의 xylose로 부터 약 34g/l로 최대농도를 보여주었다. 온도가 증가 할수록 최대 비증식속도가 증가하였지만 최종 균체농도는 감소하였고, xylitol 생산성은
Effect of culture conditions such as pH, temperature, agitation speed and oxygen transfer rate on xylitol production from xylose by Candide parapsilosis ATCC 21019 mutant was investigated in a jar fermentor. The initial concentration of xylosr was fixed at 50 g/l in this experiment. When pH was increased, cell growth and xylose consumption rate were increased, but maximum xylitol production was shown in the range of pH 4.5 and 5.5 with a yield of 0.68 g/g-xylose. The optimal temperature for xylitol production was determined to be