Fibril and hence the whole muscle. Elastin is a fibrous protein common in various soft tissues, like skin, blood vessels and lung tissue. Each monomer connects with each other, forming a 3D network, with ability to endure over 200% strain before deformation. Keratin is a structural protein mainly found in hair, nails, hooves, horns, quills. Basically keratin is formed by polypeptide chains, which coil into α-helices with sulfur cross-links or bond into β-sheets linked by hydrogen bonding. β-keratin, which is tougher than α-conformation, is more common in birds and reptiles. Resilin is an elastomeric insect protein, consisting of both α-helices and
History of removal of leg and underarm hair in the United States justification for the sudden need to remove underarm hair, and later leg hair. The message was distributed primarily and heavily through the newly-born, popular and influential women's magazines. The Delineator, first published in 1873, was the first women's magazine. Five others appeared soon after, comprising what became known as the "Big Six": Ladies' Home Journal, Woman's Home Companion, Good Housekeeping, McCall's, and Pictorial Review. The publisher of the Ladies Home Journal, Cyrus Curtis, told advertisers that the purpose of the magazine was to give manufacturers a way to market their products to women, not for the benefit of American women.