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[1] [2] [3] Silk fibroin is considered a β-keratin related to proteins that form hair, skin, nails and connective tissues. Primary structure of fibroin, (Gly-Ser-Gly-Ala-Gly-Ala) n. The silk worm produces fibroin with three chains, the light, heavy, and the glycoprotein P25.
Keratin (/ ˈ k ɛr ə t ɪ n / [1] [2]) is one of a family of structural fibrous proteins also known as scleroproteins. It is the key structural material making up scales , hair , nails , feathers , horns , claws , hooves , and the outer layer of skin in vertebrates.
Alpha-keratin, or α-keratin, is a type of keratin found in mammalian vertebrates. This protein is the primary component in hairs , horns , claws , nails and the epidermis layer of the skin . α-keratin is a fibrous structural protein , meaning it is made up of amino acids that form a repeating secondary structure.
The nō or noh mask evolved from the gigaku and bugaku and are acted entirely by men. The masks are worn throughout very long performances and are consequently very light. The nō mask is the supreme achievement of Japanese mask-making. Nō masks represent gods, men, women, madmen and devils, and each category has many sub-divisions.
Kevlar (para-aramid) [2] is a strong, heat-resistant synthetic fiber, related to other aramids such as Nomex and Technora.Developed by Stephanie Kwolek at DuPont in 1965, [3] [2] [4] the high-strength material was first used commercially in the early 1970s as a replacement for steel in racing tires.
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