from The Century Dictionary.
- noun The single cell which constitutes a yeast-plant, Saccharomyces cerevisiæ.
Sorry, no etymologies found.
Observations on the pure pentoses -- xylose and arabinose added to dextrose solutions, and then exposed to yeast action -- show that in a vigorous fermentation not unduly prolonged the pentoses are unaffected, but that they do come within the influence of the yeast-cell when the latter is in a less vigorous condition, and when the hexoses are not present in relatively large proportion.
One yeast-cell does not make a fermentation, and as no yeast is added a day is wasted whilst any yeasts which happen to be present are multiplying to an army large enough to produce a visible effect on the pulp.
We may add in praise of M. Bouchardats sagacity, that that skilful observer has always considered these results as a proof that alcoholic fermentation is dependent on the life of the yeast-cell, and that a distinction should be made between the two orders of fermentation.
But you may urge that there must have been a time when the first yeast-cell was generated.
And could every individual yeast-cell seize, without any impediment, free oxygen from the surrounding liquid, it is certain that it would cease to act as a ferment altogether.
a proof that alcoholic fermentation is dependent on the life of the yeast-cell, and that a distinction should be made between the two orders of fermentation.