Author(s):
Pinheiro, Rita 
; Belo, Isabel ; Mota, M.
Date: 1997
Persistent ID: http://hdl.handle.net/1822/1057
Origin: RepositóriUM - Universidade do Minho
Document details
Physiological behaviour of saccharomyces cerevisiae under increased air and oxy...
Description
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.
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.
Document Type
Article
Language English
Language English
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