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The maximum cordycepin production and productivity of 345.4 ± 8.5 mg/l and 19.2 ± 0.5 mg/l per day were achieved in medium with optimized carbon and nitrogen sources, i.e. 42.0 g glucose/l and 15.8 g peptone/l.
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ReNCell VM cells were grown as an adherent monolayer on poly-ornithine(0.002%) laminin (2 μg/ml -coated tissue culture flasks in the presence of 20 ng/ml of human recombinant EGF and bFGF2 in DMEM:F12 medium with nutrients optimized for neural progenitor cell growth.
Enzyme activity increased significantly with optimized medium (939 u ml−1) when compared with unoptimized medium (417 u ml−1).
After 14 hours of fermentation in shake flasks with optimized medium, B2 produced 0.43 g/L of PHB with a 34% accumulation in the cells.
The DHA yield from crude glycerol (20 g/L) with optimized medium is 14.08 g/L, which is just 12% lower than the yield for pure glycerol.This study has thus established that proper optimization of fermentation medium reduces the adverse effect of impurities in crude glycerol on fermentation process and DHA yield.
When the tube formation assay was performed, this frozen precipitate was dissolved with optimized angiogenesis medium (AM) at the same concentration of MSC-CM.
Cultivation in the medium containing 20 g/L NaCl, with optimized feeding of glycerol and ammonia, resulted in a PHB content of 66.9% of cell dry weight, and the polymer productivity and substrate yield coefficient of 1.09 g/L/h and 0.25 g PHB/g glycerol, respectively [ 35].
It has been shown that sequential media (G1/G2) produce more viable blastocysts than those embryos cultured in a single medium formulation (simplex optimized medium with elevated potassium and with amino acids, KSOMAA) throughout the preimplantation period.
The time course for xylanase accumulation by strain SJ3 in xylan-based medium showed that the highest xylanase activity reached 20.24 U/ml in an optimized medium with oats spelt xylan used as a substrate after 48 h of cultivation.
Furthermore, the maximum lutein productivity of 3.45 ± 0.07 mg L− 1 d− 1 was obtained upon cultivation of C. minutissima in a 2-L airlift photobioreactor using the optimized medium with appropriate process conditions.
Without further pH adjustment, the maximum hydrogen yield of 2.20 mol/mol glucose was obtained based on the optimized medium with further verified the practicability of this optimum strategy.
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