Murray County, Oklahoma genealogy and family history research page. Guide to genealogy, history, and courthouse sources including birth records, marriage records, death records, census records, wills, deeds and land records, Civil War records, family histories, cemeteries, churches, tax records, newspapers, and obituaries. Contents.
Side Bonds of the Cortex. The middle layer of the hair, the cortex, is made up of millions of polypeptide chains cross-linked with each other by three different types of side bonds. The bonds that link up the polypeptide chains of the hair are hydrogen, salt and disulfide bonds.Hydrogen bonds account for one-third of the hair's strength. The hydrogen bond is a weak physical side bond that is easily broken by water or heat.Hydrogen bonds can be reformed by drying or cooling the hair. These bonds are very abundant in the hair. Salt bonds are also weak physical side bonds that can easily broken by weak alkaline or acid solutions and changes in pH.here are various elements found in the hair and they are used to make amino acids, keratin, melanin, and protein. The average compostion of normal hair is composed of 45.2 % carbon, 27.9% oxygen, 6.6% hydrogen, 15.1% nitrogen and 5.2a% sulphur. The keratin found in hair is called hard keratin.
While hydrogen peroxide has been used for years to lighten hair color, research by a team of European scientists found that the natural build up of hydrogen peroxide within the hair follicles turns the hair gray. The hydrogen peroxide builds up over time due to wear and tear on the hair follicles. Due to this build up, the body is unable to produce the enzyme necessary to support the production of melanin. Melanin is responsible for hair color and, without it, hair takes on a gray color. Learn more about Hair Color