By Clarence R. Robbins
Human hair is the topic of a remarkably wide variety of medical investigations. Its chemical and actual homes are of significance to the cosmetics undefined, forensic scientists, and to biomedical researchers. The fourth version of this publication confirms its place because the definitive monograph at the topic. prior variants of this publication have been well-known as "concise and thorough" positive aspects of the Fourth variation: * New info on chemical harm from everlasting waving, bleaching and solar and the way to lessen or hinder this harm. * a brand new view of the reason for dandruff is gifted with new assisting information. This view indicates new techniques for either therapy and for advertising and marketing of scalp care items. * the newest info at the technology of hair progress and hair development stimulating brokers is supplied, together with Propecia. * a brand new part has been further on dermis and eye inflammation and dermis sensitization from parts utilized in hair care, and a version has been supplied to foretell relative dermis inflammation of shampoos. * New micrographs on "normal hair fiber form diversifications" and the way fiber form can impression chemical and actual interactions of hair fibers can be coated. *Additional fabric is now integrated on hair straightening. (Journal of the yankee Chemical Society), "an useful source" (Canadian Forensic technology Society Journal), and "highly steered" (Textile learn Journal). Chemical and actual habit of Human Hair is a educating advisor and reference quantity for beauty chemists and different scientists within the hair items undefined, educational researchers learning hair and hair progress, cloth scientists, and forensic experts.
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Extra resources for Chemical and Physical Behavior of Human Hair
Swift . Reprinted with permission of the Journal of Cosmetic Science. (>30%); the exocuticle, sometimes called the B layer, also rich in cystine (~15%); and then the endocuticle, low in cystine content (~3%) . Figure 1–22 is a transmission electron micrograph illustrating these layers through a staining reaction with silver methenamine. A portion of the undermembrane of Figure 1–21 is also epicuticle. The cystine-rich proteins of the cuticle belong to the group of proteins called keratin-associated proteins.
106–108] and Figure 1–34. Structure of an alpha-helix proposed by Pauling and Corey. 42 1. Morphological and Macromolecular Structure Figure 1–35. Molecular model of a left-hand helix of polyalanine. A right-hand helix (spiraling in the other direction) is the pattern found in most proteins, including animal hairs (see Figure 1–34). MacArthur [109, 110]. 5 angstroms (see Figures 1–34 and 1–35). 5-angstrom spacing to represent the distance between each amino acid residue. 8-angstrom spacing represented the center-to-center distance between each alpha helix, approximating the thickness of the alpha helix.
Hypertrichosis may be localized or diffuse. The most common type is called essential hirsutism or idiopathic hypertrichosis of women. , the trunk, the limbs, or the beard or mustache area). This condition is generally not due to an endocrinologic abnormality but rather is believed to be linked to the transport of testosterone from the endocrine glands to the site of activity (see Figure 1–10). Endocrinopathic hirsutism is a rare condition that results from excessive synthesis of hormones with androgenic properties.
Chemical and Physical Behavior of Human Hair by Clarence R. Robbins