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Mapping tear, strength and collagen fibril orientation in bovine, ovine and cervine hides and skins / S. J. Kelly in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIII, N° 1 (01/2018)
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Titre : Mapping tear, strength and collagen fibril orientation in bovine, ovine and cervine hides and skins Type de document : texte imprimé Auteurs : S. J. Kelly, Auteur ; Richard L. Edmonds, Auteur ; Sue M. Cooper, Auteur ; Katie H. Sizeland, Auteur ; Hannah C. Wells, Auteur ; T. Ryan, Auteur ; Nigel Kirby, Auteur ; A. Hawley, Auteur ; S. T. Mudie, Auteur ; Richard G. Haverkamp, Auteur Année de publication : 2018 Article en page(s) : p. 1-11 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cuirs et peaux -- Analyse
Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux de bovins
Cuirs et peaux de cervidés
Cuirs et peaux de moutons
Diffusion aux petits angles
Distribution et orientation des fibres
Fibrilles de collagèneLa fibrille de collagène est une structure constituée d'un assemblage de fibres de tropocollagène (assemblage de 3 protéines de collagène alpha (alpha 1 - alpha 1 - alpha 2) en une hélice droite.
Résistance à la déchirureIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Leather is a natural and variable material. The variation in strength has previously been shown to be due in part to the collagen fibril orientation. However, the extent of variation in strength and orientation over a skin/hide is not well established. Synchrotron small angle X-ray scattering is used to measure collagen fibril orientation (O) and orientation index (OI). Tear strength is measured in two orthogonal directions across ovine and cervine skins and bovine hides. Average normalized strengths varied between species with cervine leathers having the greatest overall strength followed by bovine then ovine leathers. Ovine had the greatest variability in strength across the skin. There were no obvious regions of generally stronger or weaker skin within individual skins or hides. The predominant collagen fibril direction was perpendicular to the backbone of all species, with the greatest perpendicular alignment in ovine followed by cervine. Collagen fibril orientation in leathers made from of ovine, bovine and cervine skins have been analyzed quantitatively and in detail. Findings suggest an unpredictable variability in collagen arrangements within each species but a notable difference in strength between species. Note de contenu : - METHODS : Leathers - Test samples - Tear strength - Small angle X-ray scattering (SAXS) - Orientation and orientation index - Samples
- RESULTS : Tear strength - SAXS measurements - Variation of O in the OSP grid square sample - Orientation index - Orientation - Correlation between O and tear strength - Difference between belly and backEn ligne : https://drive.google.com/file/d/18J4tLzzVaEGSbu3Mx6EnI4zz0Ct7Kl_y/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29744
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXIII, N° 1 (01/2018) . - p. 1-11[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19487 - Périodique Bibliothèque principale Documentaires Disponible Resolution of scatter cockle on pickled pelts and crust leather after treatment of lambs to remove lice / Sue M. Cooper in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 81, N° 3 (05-06/1997)
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Titre : Resolution of scatter cockle on pickled pelts and crust leather after treatment of lambs to remove lice Type de document : texte imprimé Auteurs : Sue M. Cooper, Auteur Année de publication : 1997 Article en page(s) : p. 94-97 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Shower dipping with a diazinon-based product gave rapid and complete eradication of lice. The effect of treatment with a synthetic pyrethroid pour-on product was not a rapid or complete. Pickled pelts showed much less cockle within four weeks of either diazinon or synthetic pyrethroid treatment, but the residual effects of cockle on crust leather remained on some skins for at leats 24 weeks after even the most effective treatment for lice. En ligne : https://drive.google.com/file/d/1TsIp4hZFU5NKeEoRB54Y_Xob0kQGxUeh/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8046
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 81, N° 3 (05-06/1997) . - p. 94-97[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 007016 - Périodique Bibliothèque principale Documentaires Disponible The effect of infection with dermatophilus congolensis on lamb and sheep pelts / Sue M. Cooper in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 77, N° 3 (05-06/1993)
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Titre : The effect of infection with dermatophilus congolensis on lamb and sheep pelts Type de document : texte imprimé Auteurs : Sue M. Cooper, Auteur ; A. Passman, Auteur Année de publication : 1993 Article en page(s) : p. 75-77 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Défauts
Cuirs et peaux de chèvres
Cuirs et peaux de moutons
Dermatoses
Peau -- Maladies chez les animauxIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : This work has shown that infection of the live anmial with the bacterium dermatophilus congolensis causes the pelt defect known as whitespot which is relatively common in New Zealand pelts. While either drying or antibiotic treatment were effective inhealing the clinical infections, the pelt defect persisted for at least six weeks after treatment in a number of cases. En ligne : https://drive.google.com/file/d/1k0lAtOZvn4y4Sy0k-0K1trARX0-LXbwe/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8498
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 77, N° 3 (05-06/1993) . - p. 75-77[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 006992 - Périodique Bibliothèque principale Documentaires Disponible The effect of lamb treatments on whitespot prevalence in dyed crust leather / Sue M. Cooper in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 76, N° 2 (03-04/1992)
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Titre : The effect of lamb treatments on whitespot prevalence in dyed crust leather Type de document : texte imprimé Auteurs : Sue M. Cooper, Auteur ; A. Passman, Auteur Année de publication : 1992 Article en page(s) : p. 47-50 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : A trial was done on lambs which tested the effect of six topical treatments (a diazinon solution, the excipient of this solution, a high-cis cypermethrin pouron, two disinfectants, and a zinc sulphate solution) and shearing on the prevalence and severity of the whitespot defect on dyed crust leather produced from of whitespot. Zinc sulphate had no significant effect. All the treatments except zinc sulphate and the excipient also appeared to increase the severity of the whitespot. The trials also demonstrated that the efficiency of whitespot detection in pickled pelts is low. En ligne : https://drive.google.com/file/d/1XvdwAQQsJRG6VZcqjjlQVpov6hHmOTTI/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8634
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 76, N° 2 (03-04/1992) . - p. 47-50[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 006985 - Périodique Bibliothèque principale Documentaires Disponible The impact of milling on leather properties and fatliquor distribution / Richard L. Edmonds in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 101, N° 6 (11-12/2017)
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Titre : The impact of milling on leather properties and fatliquor distribution Type de document : texte imprimé Auteurs : Richard L. Edmonds, Auteur ; Adriano Peruzzi, Auteur ; Sue M. Cooper, Auteur Année de publication : 2017 Article en page(s) : p. 312-317 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Croûte (cuir) On entend par "cuir en croûte" des cuirs ayant subi les opérations jusqu'au tannage, à l'exclusion de toute opération de corroyage ou de finissage, mais qui, par opposition aux wet-blue ont été séchés.
Cuirs et peaux -- Analyse
Cuirs et peaux -- Teneur en matières grasses
Douceur (toucher)
Echantillonnage
Epaisseur -- Mesure
Fragmentation
Lipides
Produits de nourriture du cuir
Résistance à la déchirureIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Leather samples were produced With five different types of fatliquor and were treated with a standard milling process. The leathers were assessed before and after milling for strength and softness using standard rnethods and fatliquor distribution was analysed. Milling was pound to increase softness and thickness, and increased the strength of the leather for four of the five different fatliquored samples. The fatliquor distribution was determined using a novel technique where image analysis of a series of photomicrographs of cross sections stained with Sudan III/IV was carried out. It was found that
different fatliquors were distributed slightly differently in the leathers. There were peaks of fat in the grain and lower corium with much less in the upper corium. When the fatliquored crust leather was milled the overall distribution of fat through the cross section remained unchanged indicating that changes in physical properties brought about by milling were not the result of bulk fatliquor redistribution.Note de contenu : - MATERIALS AND METHODS : Leather preparation - Physical testing - Staining procedure - Microscope image analysis
- RESULTS AND DISCUSSION : Absolute fat content - Tear strength, thickness and softness - Redistribution of fat with mechanical actionEn ligne : https://drive.google.com/file/d/1d5JimwdFOymORe-NiEQi18bf2LpHzaME/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29671
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 101, N° 6 (11-12/2017) . - p. 312-317[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19446 - Périodique Bibliothèque principale Documentaires Disponible