The first building to use a steel frame in St. Louis was the Wainwright Building, a 10-story office building and one of the first modern skyscrapers. The building, which was designed by Louis Sullivan and Dankmar Adler, illustrates Sullivan's principle of form follows function.
keratinocyte. [keratâ²inÅsÄ«tâ²]. Etymology: Gk, keras + kytos, cell. an epidermal cell that synthesizes keratin and other proteins and sterols. These cells constitute 95% of the epidermis, being formed from undifferentiated, or basal, cells at the dermal-epidermal junction.
Keratin (/ËkÉrÉtÉªn/[1][2]) is one of a family of fibrous structural proteins. Keratin is the protein that protects epithelial cells from damage or stress. Keratin is extremely insoluble in water and organic solvents. It is the key structural material making up the outer layer of human skin.