The Eastern Standard Time, abbreviated EST, refers to the standard time on the 5th time zone west of the Greenwich Meridian. This time zone is reckoned 75 degrees west of the Greenwich and it encompasses most of the eastern parts of the United States. It is also the timezone used in Canada, the Caribbean, and in a few countries of South America.
What is a Food Bolus? A food bolus is a small, round mass of food that is formed in the mouth during the early phase of digestion. A food bolus is formed when a piece of food is chewed, lubricated with saliva, mixed with enzymes and formed into a soft, lubricated and cohesive mass. The bolus is held in the mouth, or oral cavity, until the process of swallowing begins.
Dentin is the substance between enamel or cementum and the pulp chamber. It is secreted by the odontoblasts of the dental pulp. The formation of dentin is known as dentinogenesis. The porous, yellow-hued material is made up of 70% inorganic materials, 20% organic materials, and 10% water by weight.ementum is a specialized bone like substance covering the root of a tooth. It is approximately 45% inorganic material (mainly hydroxyapatite), 33% organic material (mainly collagen) and 22% water.