[article]
| Titre : |
Studies on mono and divalent cations effects on hair immunization |
| Type de document : |
texte imprimé |
| Auteurs : |
Domenico Castiello, Auteur ; Monica Puccini, Auteur ; Dennis C. Shelly, Auteur ; Sandra Vitolo, Auteur |
| Année de publication : |
2007 |
| Article en page(s) : |
p. 341-346 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
Within the studies on the phenomenon of alkali-induced hair immunization, it has been observed that the hair immunization process arising from the action of dibasic alkalis takes place differently than immunization using monobasic alkalis. On the basis of these observations, our work investigated the influence of mono and divalent cations on the hair immunization mechanisms. In our experimental design, fresh salted bovine hides were exposed to mono and divalent alkalis and salts at different concentrations for various time periods. After treatment, the hides were exposed to reducing agents in order to verify the effectiveness of each cation in promoting immunization. We observed that immunization occurs with dibasic cations, but that both a minimum exposure time and a proper alkalinity are required. The appearance of inter and intra polypeptide chain links was investigated by comparing non-immunized and immunized hair using MIR and FIR spectroscopy, ICP chemical analysis and DSC. The chemical and the instrumental analyses indicate that the exposure of hair to divalent cations in alkaline medium, unlike the monovalent cations, induces the formation of cross-links in the keratin structure and promotes immunization. These investigations contribute to confirmation that the immunization process occurs only in the presence of divalent cations. Research work is in progress in order to further understand the nature and the mechanisms of these complex interactions. |
| En ligne : |
https://drive.google.com/file/d/1Xz8u5bxbOEJcOBfHC3O4GaODxu5KLeur/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3319 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CII, N° 11 (11/2007) . - p. 341-346
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Studies on mono and divalent cations effects on hair immunization in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CII, N° 11 (11/2007)
