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 family of fibrous structural proteins. Keratin is the key structural material making up the outer layer of human skin. It is the key structural component of hair and nails, so obviously itâs super important. Keratin is also found in our tongue and hard palette, making them strong and durable.