Histological structure of hides and crossbreeds by italian beef breed bulls and the physical properties of the leather / Piotr Zapletal in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 80, N° 4 (07-08/1996)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 80, N° 4 (07-08/1996) . - p. 118-119 Titre : Histological structure of hides and crossbreeds by italian beef breed bulls and the physical properties of the leather Type de document : texte imprimé Auteurs : Piotr Zapletal, Auteur ; J. Szarek, Auteur ; A. Weglarz, Auteur ; E. Gardzina, Auteur Année de publication : 1996 Article en page(s) : p. 118-119 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The introduction of new breeds for commercial crossing requires an insight into changes in the histological structure of the skins. Experiments were carried out on crossbreeds from black-and-white cows X italian beef bulls : Piemontese, Chianina and Marcjigiana, the control group being young black-and-white bulls. At slaughter,skin tissue samples were collected for histological and ultrastructural studies. The skins of the italian beef bull breed crosses were characterised by a very well formed splicing of the collagen fibres and a dense network of elastin fibres. A higher proportion of the reticular layer (corium) and the grain sublayer (upper part of the grain layer, above the sebaceous and sweat glands) (8) were found in the dermis of the crossbreeds. This considerably increased the values of the mechanical parameters of the skins. Differences in the tensile and tear strengths of the leather between the piemontese and marchigiana crosses were statistically significant (P<0.05). The properties of the interweaving and spacing of the collagen fibres were highly correlated to the tensile and tear strengths. En ligne : https://drive.google.com/file/d/15905PQpt6VYPdweD3_JjHITc2bRjXGDH/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8123 [article]

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Structure of skin in collagenous fibres : crossbreeds from black-and-white-cows X bulls of beef breeds / Piotr Zapletal in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 85, N° 6 (11-12/2001)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 85, N° 6 (11-12/2001) . - p. 207-210 Titre : Structure of skin in collagenous fibres : crossbreeds from black-and-white-cows X bulls of beef breeds Type de document : texte imprimé Auteurs : Piotr Zapletal, Auteur ; J. Szarek, Auteur ; A. Weglarz, Auteur Année de publication : 2001 Article en page(s) : p. 207-210 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bovins -- Races Collagène -- Analyse Croisement de races Cuirs et peaux de bovins Peau -- analyse Peau -- Histologie Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The aim of this study was to define the effect of crossing Black-and-White (CB) cattle with Italian beet' breeds (Piemontese-P. Marchigiana-M and Chianina-.Ch) and with Aberdeen Angus (AA) breed as well as that of pure Black-and—White breed with AA and Simmental (S) bulls, on the histological structure of skin tissue and properties of the collagen fibres. Knowledge of the arrangement and structure of' collagen fibres of the studied skins may be helpful in choosing the correct technological process for their dressing, or in developing a new one which would result in a better utilisation of raw material. It can be stated that analysis of’ photographs of skin tissue under scanning electron microscopy (SEM) corresponds with the results of fibre measurements conducted under a light microscope. Skin tissue of bulls (CB x P) x AA and CB x AA showed the smallest spacing between the bundles of collagen fibres. The largest number of fibres in a bundle was contained in the skins of crossbreeds (CB x M) x AA and (CB x P) x AA. In contrast. the skins of S and (CB x Ch) x AA. crossbreeds (CB x M) x AA and (CB x P) x AA were characterised by a largest number of fine fibres in a bundle. Based on an organoleptic assessment the latter skin tissue displayed higher fineness and softness as well as better elasticity. The thickness of the collagen fibres was relatively greater in the skins of those breed groups. which were characterised by a smaller number of fibres in a bundle. A high content of collagen in the skin of Simmental and CB x S bulls is indicative of its extended structure and denser network. Note de contenu : - Table 1 : Selected parameters of skin histological structure - Table 2 : Selected parameters of skins ultrastruktural structure (scanning microscope) En ligne : https://drive.google.com/file/d/14rMlnaSUXfvi5a20zck_Strc8pn1HjBR/view?usp=drive [...] Format de la ressource électronique : pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40215 [article]

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