Journal
BRAZILIAN JOURNAL OF PHARMACEUTICAL SCIENCES
Volume 45, Issue 1, Pages 153-162Publisher
UNIV SAO PAULO, CONJUNTO QUIMICAS
DOI: 10.1590/S1984-82502009000100019
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- National Council for Scientific and Technological Development (CNPq)
- Ministry of Science and Technology (MCT)
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The hair thread is a natural fiber formed by keratin, a protein containing high concentration Of Sulfur coming from the amino acid cystine. The main physical proprieties of the hair depend mostly on its geometry; the physical and mechanical properties of hair involve characteristics to improve: elasticity, smoothness, volume, shine, and softness due to both the significant adherence of the cuticle scales and the movement control (malleability), as well as the easiness of combing, since they reduce the fibers static electricity. The evaluation of these effects on hair may be carried Out by several methods, as: optical and electron microscopy, mechanical resistance measuring, shine evaluation and optical coherence tomography (OCT).
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