NDLI: Enhancing xanthine oxidase fermentation with pH-shift strategy based on kinetic analysis by Arthrobacter M3

Content Provider	Springer Nature Link
Author	Zhang, Yuran Yang, Hailin Xin, Yu Zhang, Ling Wang, Wu
Copyright Year	2014
Abstract	The effect of initial culture pH and inducer concentration on xanthine oxidase (XOD) fermentation in shake flasks was first carried out. The results showed that the optimum initial culture pH and inducer concentration were 8.6 and 3.6 g/l, respectively. Batch fermentation of XOD by Arthrobacter M3 in a 7.5-l fermentor was then tested under various pH conditions ranging from 7.6 to 8.6. Based on the analysis of the obtained kinetic parameters, a pH-shift strategy in batch fermentation was implemented to enhance the XOD fermentation. In this strategy, the initial culture pH was set at 8.6 without control and was maintained at 7.6 after the biomass reached 2.0 g/l DCW. XOD production (P) and final average yield coefficient for production on biomass (FAYp/x) in this strategy reached 7,415.3 U/l and 1,229.7 U/g, respectively, which were significantly higher than the results from the other four protocols. In pH-shift batch fermentation, the Luedeking–Piret equation for product accumulation and the Luedeking–Piret-like equation for substrate consumption fit well with the experimental values. The correlation coefficients (R 2) of these two fitting curves were 0.977 and 0.992, respectively.
Starting Page	1899
Ending Page	1905
Page Count	7
File Format	PDF
ISSN	16157591
Journal	Bioprocess Engineering
Volume Number	37
Issue Number	9
e-ISSN	16157605
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2014-03-13
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Xanthine oxidase Arthrobacter M3 Kinetic analysis pH-shift strategy Kinetic model Biotechnology Industrial and Production Engineering Environmental Engineering/Biotechnology Industrial Chemistry/Chemical Engineering Food Science
Content Type	Text
Resource Type	Article
Subject	Medicine Bioengineering Biotechnology

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