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Control strategy of pH, dissolved oxygen concentration and stirring speed for enhancing β-poly (malic acid) production by Aureobasidium pullulans ipe-1

Cao, Weifeng ; Qi, Benkun ; Zhao, Juan ; Qiao, Changsheng ; Su, Yi ; Wan, Yinhua

Journal of chemical technology and biotechnology (1986), 2013-05, Vol.88 (5), p.808-817 [Periódico revisado por pares]

Chichester, UK: John Wiley & Sons, Ltd

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  • Título:
    Control strategy of pH, dissolved oxygen concentration and stirring speed for enhancing β-poly (malic acid) production by Aureobasidium pullulans ipe-1
  • Autor: Cao, Weifeng ; Qi, Benkun ; Zhao, Juan ; Qiao, Changsheng ; Su, Yi ; Wan, Yinhua
  • Assuntos: Applied sciences ; Aureobasidium pullulans ; Biotechnology ; Chemical engineering ; Constants ; Culture ; Dissolution ; dissolved oxygen concentration ; Exact sciences and technology ; Malic acid ; Stirring ; stirring speed ; Strategy ; β-poly(malic acid)
  • É parte de: Journal of chemical technology and biotechnology (1986), 2013-05, Vol.88 (5), p.808-817
  • Notas: Chinese Academy of Sciences' Knowledge Innovation Program - No. KSCX2-EW-G-3
    ark:/67375/WNG-3JBZC011-T
    istex:401AF847F616F6191D2767D1007E28995CCD9498
    ArticleID:JCTB3905
    ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
  • Descrição: BACKGROUND: β‐poly(malic acid) (PMLA) can be used as a pro‐drug or for a drug‐delivery system. Effects of pH, dissolved oxygen concentration (DO) and stirring speed were investigated to improve PMLA production by A. pullulans ipe‐1. RESULTS: The strain produced a high PMLA concentration when pH and DO remained at about 6.0 and above 70%, respectively, and the yeast‐like cells were the main PMLA producers. To further promote PMLA production, the cultivation could be divided into three phases. In phase I, cell growth was accelerated by maintaining high DO (>70%) with a constant stirring speed of 800 rpm. In phase II, PMLA production was increased by controlling DO at 70% using the automatically controlled stirring speed. In phase III, PMLA production on per gram of glucose (Yp/s) was enhanced by keeping DO at 70%, and using a low stirring speed to decrease cell growth. Compared with batch cultures, a higher PMLA yield was obtained with this strategy, i.e. PMLA production and Yp/s increased by 15% and 18%, respectively. CONCLUSION: Control strategies for pH, DO and stirring speed provide a good reference for process development and optimization of PMLA production. © 2012 Society of Chemical Industry
  • Editor: Chichester, UK: John Wiley & Sons, Ltd
  • Idioma: Inglês
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