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JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) . Vol. XCIII, N° 4Mention de date : 04/1998Paru le : 15/04/1998 |
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Ajouter le résultat dans votre panierStudies on the origin of hydrothermal stability : a new theory of tanning / Anthony D. Covington in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCIII, N° 4 (04/1998)
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Titre : Studies on the origin of hydrothermal stability : a new theory of tanning Type de document : texte imprimé Auteurs : Anthony D. Covington, Auteur ; Graham Lampard, Auteur ; R. A. Hancock, Auteur ; I. A. Ioannidis, Auteur Année de publication : 1998 Article en page(s) : p. 107-120 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Research into the thermodynamics of shrinking, the process of heat denaturation of collagen or leather, has demonstrated a relashionship between the activation energy of the reaction and the conventionally measured shrinkage temperature. This reaction is independent of the tannage, concerning instead the breaking of hydrogen bonds. It is postulated that the shrinkage temperature depends on the size of crosslinked macromolecular moieties, or 'cooperating units', formed during tannage. These, in turn, depend on the nature of the tanning agent's interaction with collagen. High hydrothermal stability depends on structure-making crosslinks. These depend on the crosslinking moiety having a 'stiff' structure and there being a non labile reaction between the crosslinking moiety and the collagen. These rules constitute a new theory of tanning. Note de contenu : - The shrinking reaction
- Cooperating units
- Hydrothermal stability : Multiple interactions - Covalent bonds - Steric considerations - CrystallinityEn ligne : https://drive.google.com/file/d/1PYet4SRyRycispwwFrxzyRTZQNg-CrFd/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4520
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCIII, N° 4 (04/1998) . - p. 107-120[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 006964 - Périodique Bibliothèque principale Documentaires Disponible Anatomy of halophile induced damage to brine cured cattle hides / Russell H. Vreeland in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCIII, N° 4 (04/1998)
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Titre : Anatomy of halophile induced damage to brine cured cattle hides Type de document : texte imprimé Auteurs : Russell H. Vreeland, Auteur ; David G. Bailey, Auteur ; Sharon Angelini, Auteur Année de publication : 1998 Article en page(s) : p. 121-131 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : In 1995 the United States exported over 20 million cattle hides with a market value of at least $1.4 billion dollars US. More than 70% of these hides are currently brine cured. The remainder are exported following chrome tanning as "wet blue stock". Brine curing has been an effective method for the preservation of hides for centuries. The process works well due to the fact that most degradative microorganisms are unable to survive the high concentrations of salt and the resultant low water activity present in the cured hide. Brine curing of hides does not, however, protect them from attack by halophilic bacteria. Extensive growth of these highly pigmented bacteria makes them readily visible to the naked eye. This condition is known industrially as 'red heat". It has long been believed by most hide processors, and tanners, that the presence of red heat indicates potential grain damage to the hide. Damage to the grain layer results in defective leather and significant financial loss to the industry. Note de contenu : - MATERIALS AND METHODS : Incubation of the hides with halophiles - Electron imaging
- RESULTS : Attachment experiments - Gross evaluation of incubated brine cured hide samples - Sem evaluation of the infected hide samplesEn ligne : https://drive.google.com/file/d/1ZU4sAhNFZ0FkHvMAvW7L-r9JSGOm_hEf/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4521
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCIII, N° 4 (04/1998) . - p. 121-131[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 006964 - Périodique Bibliothèque principale Documentaires Disponible
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Code-barres | Cote | Support | Localisation | Section | Disponibilité |
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006964 | - | Périodique | Bibliothèque principale | Documentaires | Disponible |