Changes in trehalose content of baker's yeast as affected by octanoic acid

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Changes in Trehalose Content of Baker's Yeast as Affected by Octanoic Acid

Octanoic acid inhibited ethanolic fermentation by Saccharomyces cerevisiae (bakers yeast) and the trehalose accumulation, however did not affect the endogenous degradation of trehalose. This inhibition may be explained by the binding of octanoic acid to hexokinase or other proteins of plasma membrane because they are not necessary for endogenous fermentation. The degradation of trehalose may be...

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If sodium pyruvate is added to cells of bakers’ yeast suspended in a phosphate buffer of pH 7.0 in the strict absence of oxygen, practically no pyruvate is utilized. After 3 hours in contact with the cells the sodium pyruvate can be almost quantitatively recovered. If, however, oxygen is admiNed to the cells, then both pyruvate and oxygen are utilized at appreciable rates (see Table I). So far ...

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Improving the freeze tolerance of bakers' yeast by loading with trehalose.

We examined the freeze tolerance of bakers' yeast loaded with exogenous trehalose. Freeze-tolerant and freeze-sensitive compressed bakers' yeast samples were soaked at several temperatures in 0.5 M and 1 M trehalose and analyzed. The intracellular trehalose contents in both types of bakers' yeast increased with increasing soaking period. The initial trehalose-accumulation rate increased with in...

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Lipid content and cryotolerance of bakers' yeast in frozen doughs.

The relationship between lipid content and tolerance to freezing at -50 degrees C was studied in Saccharomyces cerevisiae grown under batch or fed-batch mode and various aeration and temperature conditions. A higher free-sterol-to-phospholipid ratio as well as higher free sterol and phospholipid contents correlated with the superior cryoresistance in dough or in water of the fed-batch-grown com...

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ژورنال

عنوان ژورنال: Scientia Agricola

سال: 1993

ISSN: 0103-9016

DOI: 10.1590/s0103-90161993000300020