Biotransformation of daunomycinone into 13-dihydrodaunomycinone was performed using immobilized cells, immobilized cell homogenate and immobilized enzymes, extract of the microorganism Streptomyces aureofaciens B-96.
Polyvinyl alcohol-immobilized whole-cell preparations for the biotransformation of nitriles
β Scribed by Andrea Bauer; Norman Layh; Christoph Syldatk; Andrew Willetts
- Publisher
- Springer Netherlands
- Year
- 1996
- Tongue
- English
- Weight
- 388 KB
- Volume
- 18
- Category
- Article
- ISSN
- 0141-5492
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β¦ Synopsis
Resting cells of Rhodococcus sp. ATCC 39484 were immobilized in polyvinyl alcohol (PVA). The PVA-beads showed nitrile-hydrolysing activity with propionitrile as a model substrate. Drying of the beads resulted in a loss of weight of 85 %. Re-swollen beads showed no loss in activity. In a continuously-operated fixed-bed bioreactor, beads were able to convert substrate concentrations up to 100 mM.
π SIMILAR VOLUMES
The optimum values of substrate concentration, pH and temperature for higher yields of alcohol in cell immobilized bioreactor using alginate entrapped cells of yeasts for continuous fermentation of alcohol were obtained employing full factorial search. The results indicate that the yield of alcohol