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000909652 1001_ $$00000-0002-1515-1763$$aTäuber, Sarah$$b0
000909652 245__ $$aMicrofluidic single‐cell scale‐down bioreactors: A proof‐of‐concept for the growth of Corynebacterium glutamicum at oscillating pH values
000909652 260__ $$aNew York, NY [u.a.]$$bWiley$$c2022
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000909652 520__ $$aIn large-scale bioreactors, gradients in cultivation parameters such as oxygen, substrate, and pH result in fluctuating cell environments. pH fluctuations were identified as a critical parameter for bioprocess performance. Traditionally, scale-down systems at the laboratory scale are used to analyze the effects of fluctuating pH values on strains and thus process performance. Here, we demonstrate the application of dynamic microfluidic single-cell cultivation (dMSCC) as a novel scale-down system for the characterization of Corynebacterium glutamicum growth using oscillating pH conditions as a model stress factor. A detailed comparison between two-compartment reactor (two-CR) scale-down experiments and dMSCC was performed for one specific pH oscillation between reference pH 7 (~8 min) and disturbed pH 6 (~2 min). Similar reductions in growth rates were observed in both systems (dMSCC 21% and two-CR 27%) compared to undisturbed cultivation at pH 7. Afterward, systematic experiments at symmetric and asymmetric pH oscillations, between pH ranges of 4–6 and 8–11 and different intervals from 1 to 20 min, were performed to demonstrate the unique application range and throughput of the dMSCC system. Finally, the strength of the dMSCC application was demonstrated by mimicking fluctuating environmental conditions of a putative large-scale bioprocess, which is difficult to conduct using two-CRs
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000909652 7001_ $$0P:(DE-HGF)0$$aBlöbaum, Luisa$$b1
000909652 7001_ $$0P:(DE-Juel1)179505$$aSteier, Valentin$$b2
000909652 7001_ $$0P:(DE-Juel1)129053$$aOldiges, Marco$$b3
000909652 7001_ $$0P:(DE-HGF)0$$aGrünberger, Alexander$$b4$$eCorresponding author
000909652 773__ $$0PERI:(DE-600)1480809-2$$a10.1002/bit.28208$$gp. bit.28208$$n11$$p3194-3209$$tBiotechnology & bioengineering$$v119$$x0006-3592$$y2022
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