The original model of our hair is from the bonding found in our hair, which are the cortex layers. When hair is in its normal, unstreched state, it is also called A of Alpha keratin. Alpha keratin proteins can form into cortex layers, proto fibrils, macro fibrils, and micro fibrils. The first fibril structure of hair is when three alpha helices twist together to form a proto fibril. Nine proto fibrils are bundled together with two or more, it will become a micro fibril, which is and eleven-strand cable. Macro fibrils come together to form the cortex of the hair. This is also referred to as the main body of the hair. Various dead cells surround the macro fibril and are known as the cuticular layers. In the center of all this lies what is known as the medullary canal. The medullary canal is also part of the excretory system because it captures any foreign matter, such as heavy metals, synthetic materials, medications and other bodily secretions. These materials are released through the medullary canal. Glycerol is a big acid in the products cosmetologists use for there career. This acid is a fatty acid that is used to help moisture the hair and make it healthier. Many cosmetic products contain a substance called tallow. Types of tallow are fatty acid esters, glycerol. Fatty acids and soaps, all of which are generally considered to be safe. The sweet tasting odorless, and colorless liquid known as Glycerol, is coluble in alcohols and water and slightly soluble in dioxide and ether. It is also soluble in solvents like dioxide and ether. However, it is insoluble in hydrocarbons. It has a specific gravity of 1.26 and when this liquid is cold it can crystallize. These crystals melt at 17.9 degrees Celsius and bouls at 290 degrees Celsius. Glycerol's molecular weight is 92.09. Glycerol is a very important acid to cosmetologists and they use it every day with the products they use for hair and skin. This acid is also non-toxic so it is considered edible and a safe acid.
