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Photodegradation of hair of different ethnicity after 1 year of exposure to natural weatering in Arizona / Yash K. Kamath in IFSCC MAGAZINE, Vol. 9, N° 4 (10-11-12/2006)
[article]
Titre : Photodegradation of hair of different ethnicity after 1 year of exposure to natural weatering in Arizona Type de document : texte imprimé Auteurs : Yash K. Kamath, Auteur ; Sigrid B. Ruetsch, Auteur Année de publication : 2007 Article en page(s) : p. 325-333 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Climat naturel (Arizona)' Photodégradation 'Différent type ethnique de cheveux' SEM 'Microspectrophotométrie UV-visible' Index. décimale : 668.5 Parfums et cosmétiques Résumé : Natural weathering of hair in a relatively dry hot climate was carried out by exposing hair of different ethnicity to natural environmental conditions at a Q-Lab weathering station in Arizona. The appearance of hair fibers changed dramatically due to thinning and fusion of scales as well as fusion of individual hair fibers with each other (inter-fiber fusion) to form rod-like structures stuck together by solubilized, oozed out, gelled and finally hardened proteins. The hair became extremely rigid and brittle with radial cracks forming mostly smooth radial fractures and occasionally step fractures. There was also internal fusion of the cellular structure of the fiber. Hair fibers were characterized by scanning electron microscopy (SEM) and UV-visible microspectrophotometry. UV-visible spectra showed that natural hair color (melanin) plays an important role in protecting hair proteins, mostly by a sacrificial mechanism. Indian and Chinese black hair, which are rich in melanin, resist photochemical degradation much better than hair of European origin with moderate, low or no melanin content. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10440
in IFSCC MAGAZINE > Vol. 9, N° 4 (10-11-12/2006) . - p. 325-333[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 007645 - Périodique Bibliothèque principale Documentaires Disponible Water based anti-corrosive systems for use in tropical climates / Mark Chapman in PAINTINDIA, Vol. XLVI, N° 9 (09/1996)
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Titre : Water based anti-corrosive systems for use in tropical climates Type de document : texte imprimé Auteurs : Mark Chapman, Auteur Année de publication : 1996 Article en page(s) : p. 39-48 Langues : Anglais (eng) Tags : 'Peinture eau' anticorrosion' Utilisation 'Climat tropical' Formulation Index. décimale : 667.9 Revêtements et enduits Note de contenu : - The extent of the problem of VOCs
- Development work and testing procedures
- Binder selection
- Extender selection
- Corrosion inhibitor
- Pigment volume concentration
- Flast rust inhibitor
- pH modifier
- Other comments on formulation
- Test results
- Drying time and adhesion
- Prohesion
- Development of 1 pack finish coat
- Results of tests on finish coat
- Development of 1 pack build coat
- Results of tests on the 1 pack build coat
- Testing of the complete waterbased anti-corrosive system
Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13572
in PAINTINDIA > Vol. XLVI, N° 9 (09/1996) . - p. 39-48[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 006507 - Périodique Bibliothèque principale Documentaires Disponible