The Post-Dehydrogenation Era: Taking a Look at Different Preservatives and Their Effects on Yeasts
The Post-Dehydrogenation Era: Taking you through the different preservatives and their effects on yeast In order to ensure shelf life, packaged bread is usually added preservatives to achieve the effect of preservation of freshness and prevention of spoilage. The most basic mechanism of action of preservatives is to inhibit the growth of microorganisms, and yeast is also a kind of microorganisms, so the use of preservatives to a certain extent will affect the yeast fermentation, today, we will talk about this topic. 01 Mechanism of action of organic acid preservatives Mechanism of action of organic acid preservatives In fact, most of the preservatives we commonly use their active ingredients are various organic acids, and organic acids dissolved will automatically form a dissociation equilibrium, only the undissociated organic acids can successfully cross the microbial cell membranes to enter the cell interior, re-dissociation within the cell, acidification of the cell and thus inhibit the growth of the cell. Different organic acids have different degrees of dissociation in the same environment, which depends on the pKa (acidity coefficient/dissociation constant) of the organic acid.
