Effects of the kinetics of osmotic pressure variation on yeast viability.
The variation rate of the osmotic pressure increase was found to have a great effect on the viability of yeasts subjected to hyperosmotic stress. A low intensity of the increase rate of osmotic pressure could maintain an important viability of the cells (about 90 to 100%) even for very high levels of osmotic pressure (about 10(8) Pa). The viability level was found to be highly dependent on the physiological state of the cells: Variations in the properties of the cell membrane were supposed to be involved in such a dependence.
Gervais
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Laboratoire de Génie des Procédés, Ensbana, Campus Universitaire Montmuzard, 21000 Dijon, France.
Marechal
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PA
Molin
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