Lime-free unhairing : part 4 : Influence of unhairing method on dermatan sulphate and microscopical investigation of pelt and leather / E. Kazlauskaite in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 86, N° 2 (03-04/2002)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 86, N° 2 (03-04/2002) . - p. 59-64 Titre : Lime-free unhairing : part 4 : Influence of unhairing method on dermatan sulphate and microscopical investigation of pelt and leather Type de document : texte imprimé Auteurs : E. Kazlauskaite, Auteur ; J. Balciuniene, Auteur ; A. Zaliauskiene, Auteur ; Kestutis Beleska, Auteur ; Virgilijus Valeika, Auteur ; V. Valeikienè, Auteur Année de publication : 2002 Article en page(s) : p. 59-64 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Analyse Epilage Microscopie Sulfate de dermatane Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The article presents the final research into the system containing NaOH, Na2S, and a salt such as NaCl, Na2SO4 or Na2HPO4 and their influence on the properties of pelt and leather. Here are two main pointsof the investigations : the establishment of dermatan sulphate changes during unhairing and the microscopy investigation. It was established that the unhairing method influences the amount of dermatan sulphate in pelt. The method for dermatan sulphate determination was developed and used in this research. The results show that a strongly alkaline action does not increase the removal of dermatan sulphate. As collagen’s chemical and physical changes could be reflected in its structure, optical and scanning electron microscopy analyses of pelt and leather grain and corium were carried out. The micrographs show that the structure of pelt and leather depends on the unhairing method and it differs-differences in opening-up level are observed. These differences are clearly visible and depend on the method of unhairing. The microscopy images confirm the importance of the role of salts, which are added to the unhairing system NaOH+Na2S. Note de contenu : - Improvement of dermatan sulphate determination - Investigation of dermatan sulphate in lime-free unhaired pelt - Grain microscopy - Microscopy of corium - Table 1 : Influence of unhairing method on degradation of collagen and dermatan sulphate En ligne : https://drive.google.com/file/d/14f4WrHFHAsQIcAbi4fhaayMRoSR3Nr8c/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40029 [article]

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