The problem posed to the yeast manufacturer, however, is not as simple as just adding air during the fermentation process. If the concentration of sugar in the fermentation growth media is greater than a very small amount, the yeast will produce some alcohol even if the supply of oxygen is adequate or even in abundance. This problem can be solved by adding the sugar solution slowly to the yeast throughout the fermentation process.
Human teeth are made up of four different types of tissue: pulp, dentin, enamel, and cementum. The pulp is the innermost portion of the tooth and consists of connective tissue, nerves, and blood vessels, which nourish the tooth.
Plaque contains bacteria that cause cavities and gum disease. Tartar is calcified or hardened plaque that attaches to the enamel on your teeth and below the gum line. Signs & Symptoms. Everyone develops plaque because bacteria are constantly growing in our mouths, so it is not easy to see.o prevent decay, it's what's on the toothbrush that counts. Use fluoride toothpaste. Fluoride is what protects teeth from decay. Brush the tongue for a fresh feeling! Rinse again. Remember: food residues, especially sweets, provide nutrients for the germs that cause tooth decay, as well as those that cause gum disease.