Home > Publications database > Microfluidic single‐cell scale‐down bioreactors: A proof‐of‐concept for the growth of Corynebacterium glutamicum at oscillating pH values > print

001     909652
005     20230123110649.0
024 7 _ |a 10.1002/bit.28208
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037 _ _ |a FZJ-2022-03320
082 _ _ |a 570
100 1 _ |a Täuber, Sarah
|0 0000-0002-1515-1763
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245 _ _ |a Microfluidic single‐cell scale‐down bioreactors: A proof‐of‐concept for the growth of Corynebacterium glutamicum at oscillating pH values
260 _ _ |a New York, NY [u.a.]
|c 2022
|b Wiley
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520 _ _ |a In 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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700 1 _ |a Blöbaum, Luisa
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700 1 _ |a Steier, Valentin
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700 1 _ |a Oldiges, Marco
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700 1 _ |a Grünberger, Alexander
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|e Corresponding author
773 _ _ |a 10.1002/bit.28208
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|t Biotechnology & bioengineering
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|y 2022
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856 4 _ |u https://juser.fz-juelich.de/record/909652/files/Biotech%20Bioengineering%20-%202022%20-%20T%20uber%20-%20Microfluidic%20single%E2%80%90cell%20scale%E2%80%90down%20bioreactors%20A%20proof%E2%80%90of%E2%80%90concept%20for%20the.pdf
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