| Titre : |
Microscopic study of leather defects. IV. Histological and other physical changes in sheepskins due to ked-induced cockle |
| Type de document : |
texte imprimé |
| Auteurs : |
Mary V. Hannigan, Auteur ; A. L. Everett, Auteur ; I. H. Roberts, Auteur ; J. Naghski, Auteur |
| Année de publication : |
1976 |
| Article en page(s) : |
p. 411-424 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Cuirs et peaux -- Analyse
Cuirs et peaux -- Défauts
Cuirs et peaux -- Propriétés physiques
Cuirs et peaux de moutons
Essais (technologie)
Essais dynamiques
Mélophage
Parasitoses
Peau -- Histologie
|
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
Histological and histochemical evaluations were made to determine why sheepskin with cockle defect caused hy keds (Melophagus ovinus) cannot tee processed into high quality suede and other kinds of leather. The physical properties also were compared for defective and normal leathers.
Samples of fresh ked-infested and uninfested sheepskins from three body locations, preserved with three fixatives, were evaluated hy several procedures for evidence of abnormal components such as inflammatory cells and interfibrillar cementing material. The results confirmed other reports of the increase in cellular infiltration in the grain (papillary) layer of infested skin, particularly hy eosinophilic leukocytes, which indicated an allergie reaction. Eosinophiles were also prevalent in the corium (reticular) layer. No other unusual interfibrillar material was found, nor was collagen composition nor elastic tissue content altered.
Standard strength and density measurements on garment suede and slipper upper leathers produced from normal and ked-infested sheepskin showed no difference in apparent density, but, more important, they showed lower strength and greater stiffness values for defective than for normal leathers. The reduced strength has not heen demonstrated before. |
| Note de contenu : |
- EXPERIMENTAL : Skin samples for histology - Histological procedures - Microscopy - Hemetological and amino acid analyses - Leather samples for physical testing - Density - Physical strength tests
- RESULTS AND DISCUSSION : Tissue changes - Staining effects - Amino acid composition of collagen - Density measurements - Strength and stiffness of leathers - Scannine Electron Microscopy of suede
- Table 1 : Histological observations of sheepskin cross sections
- Table 2 : Hematological values and ked counts from 11 pairs of sheep
- Table 3 : Apparent density values for fixed samples of sheepskin
- Table 4 : Average results of physical tests of sheepskin leathers |
| En ligne : |
https://drive.google.com/file/d/1BacppWfKLDU5wJcP5nXzwqTl_oefnMB9/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41495 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXI (Année 1976) . - p. 411-424
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