Yeast: nf Yeast is a microscopic, unicellular fungus used for the fermentation of so-called “leavened” doughs. Scientific work on yeasts began in the 1857th century with the invention of the microscope. In 1822, Louis Pasteur (1895-XNUMX) showed that it was yeast which, in the absence of oxygen, caused fermentation.
Baker's yeast, or brewer's yeast, which is bought fresh, needs a certain time to act when it is introduced into the dough; they...
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