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Cosmetology


            Hairdresser, Manicurist/Pedicurist, and Shampooer are job titles that all fall under the umbrella of cosmetology although licensing and training requirements are different for each. A person who performs haircuts, styling, make up manicures, or other services is considered a cosmetologist.
             The structure of hair is the first thing that cosmetologists have to deal with. The proteins are in hair and are fibrous proteins called keratin. Keratin proteins are made up of polypeptide chains. There are also many bonds that are composed in our hair, and they all deal with elements and proteins. The bonds are the hydrogen bond, the salt bond, the cystine bond and the sugar bond. The hydrogen bond allows the hair stretch elasticity and return to its original shape. This bond can be located between the coilds of the alpha helix. The salt bond also has to due with part of the structure of our hair. Electro transfer between the side chain of an amino acid and the side chain of and acidic position running even with the rotation of the helix of the hair is called a salt bond. Cross-links between cystine residues (amino acids) of the main polypeptide chains work to form the cystine or disulfide bond, also known as the sulfur or S bond. The last bond in the hair structure is the sugar bond. The sugar bond is known to give the hair toughness and little strength. This bond is made up between the side chain of an amino acid and the OH group and an acidic amino group. Chemistry has to due with the temperature of your hair and what you use in it because the products you put in or machines ( blow dryers and irons) you use for your hair decides of how it comes out and this is all caused by reactions and chemicals.
             The alpha helix is another name for the polypeptide chain that forms keratin protein in hair. It has a structure of a coiled coil and is formed when amino acids come together. The connection of each amino acid is from the peptide bond and it is between the carbon atom of one of the amino acids and the nitrogen atom of another.


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