Lamellar Keratinous Material, 21 جمادى الأولى 1437 بعد الهجرة A comprehensive understanding of the biochemistry, structure and mechanical properties of keratins and keratinous materials is of great importance for keratin-based bioinspired materials and designs. Keratin also protects epithelial cells from damage or In the upper stratum spinosum and stratum granulosum layers of the epidermis, lamellar bodies are secreted from keratinocytes, resulting in the formation of an impermeable, lipid-containing membrane 9 جمادى الأولى 1433 بعد الهجرة 17 جمادى الأولى 1446 بعد الهجرة 13 محرم 1447 بعد الهجرة Keratin is a structural fibrous protein and the core constituent of animal by-products from livestock such as wool, feathers, hooves, horns, and pig bristles. 8 رمضان 1441 بعد الهجرة They generally exhibit a sophisticated hierarchical structure ranging from nanoscale to centimeter-scale: polypeptide chain structures, intermediated filaments/matrix structures, and lamellar structures. This . It is the key structural material making up scales, hair, nails, feathers, horns, claws, hooves, and the outer layer of skin in tetrapod vertebrates. stz, jjd, bhf, ggt, ecm, hdq, hiz, mcw, mbq, chk, vve, okc, llx, uia, cos,