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.
Receding gums. Receding gums, where more of the lower part of teeth becomes exposed, can be a sign of gum disease. Left untreated, the supporting tissue and bone structures of the teeth can be damaged, and teeth may be lost. Gum recession is a common dental problem. These are bacterial gum infections that destroy gum tissue and supporting bone that hold your teeth in place. 2  Gum disease is the main cause of gum recession. 3  Your genes. 4  Some people may be more susceptible to gum disease.