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Physiological behaviour of Saccharomyces cerevisiaeunder increased air and oxygen pressures

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Abstract

Saccharomyces cerevisiae, in a pressure batch reactor, coped with higher air (1.2-3 bar) pressures better than with pure oxygen pressures (1.2-3 bar) for an equivalent dissolved oxygen concentration. However, pure oxygen pressure enhanced ethanol production. Both pressures did not influence the type of metabolism followed by the organism which was always oxidoreductive. Growth was inhibited with the increase of air and pure oxygen pressure and almost completely inhibited with 8 bar of pure oxygen. Above 3 bar activities of mitochondrial superoxide dismutase and glutathione reductase increased with air pressure, but cytosolic superoxide dismutase and catalase increased activity only in pure oxygen pressure.

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Authors and Affiliations

  1. Centre of Biological Engineering/IBQF, University of Minho, Campus de Gualtar, 4710, Braga, Portugal

    Rita Pinheiro, Isabel Belo & Manuel Mota

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  1. Rita Pinheiro
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  2. Isabel Belo
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  3. Manuel Mota
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Pinheiro, R., Belo, I. & Mota, M. Physiological behaviour of Saccharomyces cerevisiaeunder increased air and oxygen pressures. Biotechnology Letters 19, 703–708 (1997). https://doi.org/10.1023/A:1018311503800

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  • DOI: https://doi.org/10.1023/A:1018311503800

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