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.
The Scientific Processes During Perming & Relaxing As we know, the hair is made up of protein chains held together by series of physical and chemical bonds which give the hair its shape and strength. The bonds we are most concerned with in styling the hair are the side bonds. Side bonds are found in two forms â physical side bonds and chemical side bonds. Breaking and reforming these side bonds allow us to rearrange the wave pattern of the hair. Physical side bonds can be broken using heat and water and reform when the hair dries and/or cools. However, this article is about perming and relaxing and the scientific processes that occur. When the hair is permed (and sometimes when straightened) the disulfide bonds (the chemical side bonds) of the hair are broken through a chemical reaction called âreductionâ. A reduction reaction involves either the removal of oxygen or the addition of hydrogen. In the case of permanent waving, the reduction is due to the addition of hydrogen.