1 In the All or part of the file name box, type officeav.dll. 2  In the Look in box, click Local Hard Drives. 3  Click Search. When the search result is displayed in the right pane, note the path of the Officeav.dll file.  Locate the Officeav.dll file, right-click officeav.dll, and then click Rename.
The hair shaft made of a protein called keratin is tough and resistant to wear and tear. Eighteen amino acids make up the keratin of which the most abundant is the cysteine. It gives the hair much of its strength. The middle layer of the hair is the cortex. It is made up of polypeptide chains that are cross-linked with each other, by three different types of side bonds.
Keratin is a protein found naturally in skin, hair and nails, in addition to other sources. In human hair, it acts both as an external protective shield and an internal structural protein. Keratin is the first thing depleted when hair is damaged physically, chemically or from environmental factors such as the sun.eratin is a protein found naturally in skin, hair and nails, in addition to other sources. In human hair, it acts both as an external protective shield and an internal structural protein. Keratin is the first thing depleted when hair is damaged physically, chemically or from environmental factors such as the sun.