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- W2101591208 abstract "Abstract Fermentation optimization experiments are ideally performed at small scale to reduce time, cost and resource requirements. Currently microwell plates (MWPs) are under investigation for this purpose as the format is ideally suited to automated high‐throughput experimentation. In order to translate an optimized small‐scale fermentation process to laboratory and pilot scale stirred‐tank reactors (STRs) it is necessary to characterize key engineering parameters at both scales given the differences in geometry and the mechanisms of aeration and agitation. In this study oxygen mass transfer coefficients are determined in three MWP formats and in 7.5 L and 75 L STRs. k L a values were determined in cell‐free media using the dynamic gassing‐out technique over a range of agitation conditions. Previously optimized culture conditions at the MWP scale were then scaled up to the larger STR scales on the basis of matched k L a values. The accurate reproduction of MWP (3 mL) E. coli BL21 (DE3) culture kinetics at the two larger scales was shown in terms of cell growth, protein expression, and substrate utilization for k L a values that provided effective mixing and gas–liquid distribution at each scale. This work suggests that k L a provides a useful initial scale‐up criterion for MWP culture conditions which enabled a 15,000‐fold scale translation in this particular case. This work complements our earlier studies on the application of DoE techniques to MWP fermentation optimization and in so doing provides a generic framework for the generation of large quantities of soluble protein in a rapid and cost‐effective manner. Biotechnol. Bioeng. 2008;99: 1128–1139. © 2007 Wiley Periodicals, Inc." @default.
- W2101591208 created "2016-06-24" @default.
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- W2101591208 creator A5079938783 @default.
- W2101591208 creator A5091560608 @default.
- W2101591208 date "2007-10-29" @default.
- W2101591208 modified "2023-10-15" @default.
- W2101591208 title "Scale-up ofEscherichia coli growth and recombinant protein expression conditions from microwell to laboratory and pilot scale based on matchedkLa" @default.
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- W2101591208 doi "https://doi.org/10.1002/bit.21697" @default.
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