Fluorescence and scanning electron microscopic characterization of cuticle erosion in human hair / Sigrid B. Ruetsch in IFSCC MAGAZINE, Vol. 9, N° 1 (01-02-03/2006)

[article]  inIFSCC MAGAZINE > Vol. 9, N° 1 (01-02-03/2006) . - p. 29-35 Titre : Fluorescence and scanning electron microscopic characterization of cuticle erosion in human hair Type de document : texte imprimé Auteurs : Sigrid B. Ruetsch, Auteur ; Yash K. Kamath, Auteur Année de publication : 2006 Article en page(s) : p. 29-35 Langues : Anglais (eng) Catégories : Caractérisation Cheveux -- Détérioration Cuticule -- Détérioration Fluorimétrie Microscopie électronique à balayage Tags : 'Cheveu'  'Exposition  environnementale'  au  toilettage  'Usure  du  cuticule'  'Caractéristiques  phénomène  de  dommage  cheveu'  'Microfluorométrie  SEM' Index. décimale : 668.5 Parfums et cosmétiques Résumé : Environmental and natural grooming damage of hair were investigated by the microfluorometric method using Rhodamine B as the fluorescent tracer. An increase in fluorescence intensity of tracer-tagged hair as we moved from the root to middle section and trip end is indicative of weathering and progressive mechanical damage. The locus of Rhodamine B penetration and interaction occurs at the scale edge in the root end, changing to the scale face and scale edge in the middle section, and finally to the cortical cell surfaces and the intercellular cement at the tip end in long hair. The resulting increase in fluorescence emission intensity is indicative of progressive damage to the cuticular structure, ultimately resulting in the loss of the cuticular sheath. Scanning electron microscopic observations show detailed features of progressive cuticle erosion and abltion. Characteristic changes in the physical nature and shape of the cuticle cell compared to its appearance as it emerged from the follicle are indicative of environmental and mechanical damage inflicted upon hair. Change of the smoothly contoured scale edge to its jagged shape, frequent appearance of "failed endocuticular material" left behind after the inextensible A-layer and exocuticle have been chipped away, and "tear lines" or "seams", which are the loci where the surface cuticle cells were orinally attached, are indicative of progressive cuticle erosion. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10535 [article]

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