| Titre : |
A model for proteolytic depliation of skins |
| Type de document : |
texte imprimé |
| Auteurs : |
D. Brady, Auteur ; J. R. Duncan, Auteur ; Alan E. Russell, Auteur |
| Année de publication : |
1990 |
| Article en page(s) : |
p. 334-343 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
| Résumé : |
Research involving selected combinations of commercial proteases provided evidence that a synergistic depilatory effect occurs when proteases of complementary bond specificities are used in conjunction in enzymic depilatory preparations. Some form of strong alkali treatment of skins was found to be necessary to produce a skin fibre matrix of the prerequisite quality when the skin was depilated by proteases since, otherwise, the depilated skin after acetone dehydration was found to be depleted and stiff. Calcium hydroxide alone was found to be inadequate for this task, probably owning to the fact that it is less alkaline than the lime-sulfide mixture. Sodium hydroxide was therefore used in conjunction with calcium hydroxide (lime) to match the alkalinity of the lime-sulfide solution in order to produce skin characteristics comparable with those from a line-sulfide unhairing treatment.
A combinaison of the information provided by the results obtained in the present systematic study combined with information gleaned from the relevant literature allowed for the construction of a model to represent the possible mechanism of enzymic depilation of skins. In terms of this model, depilation is caused by the disruption of the basement membrane at the dermal-epidermal junction through the degradation of its constituent molecular components by combinations of proteases with completely specifities, resulting in the removal of both the epidermis and associated wool or hair. |
| En ligne : |
https://drive.google.com/file/d/1qy3G63b_brAZRW5U54vDu0o3VRg3F6Ox/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8724 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXXV (Année 1990) . - p. 334-343
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A model for proteolytic depliation of skins in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXV (Année 1990)
