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JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) . Vol. XCII, N° 9Mention de date : 11/1997Paru le : 01/11/1997 |
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Ajouter le résultat dans votre panierIron complexes as tanning agents / S. Balasubramanian in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCII, N° 9 (11/1997)
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Titre : Iron complexes as tanning agents Type de document : texte imprimé Auteurs : S. Balasubramanian, Auteur ; R. Gayathri, Auteur Année de publication : 1997 Article en page(s) : p. 218-224 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Mixed ligand complexes of iron (II) with an aliphatic diamine (ethylenediamine) and a dicarboxyclic acid such as oxalic, malonic, succinic or phthalic acid, were synthesized and used for tanning experiments either alone or in combination with aluminium or vegetable tanning materials. The leather samples obtained in all three methods were tested for hydrothermal stability and iron content. Combination tanned leathers exhibited higher stability when compared to pure iron tanned systems. The iron content in all three systems was low and a direct correlation between metal content and hydrothermal stability could not be made as the factors influencing the strength characteristics in a combination tanned system are quite different from those of pure iron tanned leathers. The vegetable-iron combination tanned leathers were found to be soft and dark. En ligne : https://drive.google.com/file/d/10TVCnfPJRditdv_wlQC6ubyhM2PUHKXO/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=7571
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Code-barres Cote Support Localisation Section Disponibilité 006960 - Périodique Bibliothèque principale Documentaires Disponible A conformational study of collagen as affected by tanning procedures / Eleanor M. Brown in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCII, N° 9 (11/1997)
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Titre : A conformational study of collagen as affected by tanning procedures Type de document : texte imprimé Auteurs : Eleanor M. Brown, Auteur ; Robert L. Ducley, Auteur ; Alicia R. Elsetinow, Auteur Année de publication : 1997 Article en page(s) : P. 225-233 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Chrome tanning of animal skins to produce high quality leather is a well estabished industrial process. The multistep process whereby complex salts of trivalent chromium (Cr(III)) crosslink collagen fibrils is more an art form than a science. One of the first steps in this process is the interaction of chromium with collagen and this reaction is poorly understood. Our goal is to develop a scientific basis for improving the effectiveness and efficiency of tanning technology. In the present study, we use spectroscopic methods circular dichroism (CD) and 13-carbon nuclear magnetic resonance(13C NMR) and transmission electron microscopy(TEM) to characterize the effects of various steps in the chrome tanning process on the conformation of soluble collagen. Partial denaturation of collagen prior to chromium binding appears to be nacessary. The ratio of the 13C NMR peaks due to free carboxyl groups of aspartic and glutamic acids was altered when chromium was bound to the collagen. A network of soluble crosslinked collagen could be seen in transmission electron micrographs of chromium-collagen complexes. En ligne : https://drive.google.com/file/d/19xxsgj0iOLgzJHTyvAMOweV9uRH0icSQ/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=7572
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCII, N° 9 (11/1997) . - P. 225-233[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 006960 - Périodique Bibliothèque principale Documentaires Disponible
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Code-barres | Cote | Support | Localisation | Section | Disponibilité |
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006960 | - | Périodique | Bibliothèque principale | Documentaires | Disponible |