Studies on the ethiopian camel hides for their suitability for making leather / M. Belay in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIV, N° 2 (02/2019)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXIV, N° 2 (02/2019) . - p. 48-54 Titre : Studies on the ethiopian camel hides for their suitability for making leather Type de document : texte imprimé Auteurs : M. Belay, Auteur ; R. Karthikeyan, Auteur ; Victor John Sundar, Auteur ; Rathinam Aravindhan, Auteur Année de publication : 2019 Article en page(s) : p. 48-54 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation 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 -- Propriétés physiques Cuirs et peaux -- Teinture Cuirs et peaux de chameaux Dichroïsme circulaire Peau -- Histologie Tannage Wet-blue (tannage) Peau tannée au chrome (le chrome donne une couleur bleue) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Ethiopia has the largest livestock population in the African countries, providing a strong raw material base for the growing leather and leather products sector. The main source of raw material for the Ethiopian tanning industry comes from sheep, goat and cattle. Since the Ethiopian leather industry is booming, the industry is now looking to exploit the alternative raw materials available in the country. Camel (Camelus dromedarius) is one of the most important livestock in the East African countries. Due to lack of awareness and technology, most of the hides are not utilized fully by the tanners. Hence an attempt has been made in the present study to exploit the camel hides as an alternative source of raw material for the growing Ethiopian leather industry. Histological analysis of the camel hide has been carried out at different stages of processing. Based on the histological understanding, the strategy for making suitable leather from camel hide was established. The raw material has also been characterized for fat, nitrogen and collagen content. The raw material has been converted into finished leather by using suitable tanning methodology and the leathers were utilized for the preparation of different types of end products. Finished leathers have been developed and the physical and chemical properties have also been evaluated. The results obtained from the chemical and physical tests revealed that the raw material is suitable for the manufacture of upper leather. Note de contenu : - EXPERIMENTAL : Materials - Chemical and structural analysis of camel hides. Histological studies with hematoxyline-eosin (H & E) staining - Scanning electron microscopy (SEM) of wet blue camel leather - Determination of moisture content - Determination of fat content - Determination of nitrogen content - Determination of hydroxyproline content - SDS-polyacrylamide-gel electrophoresis (SDS-PAGE) - Circular dichroism (CD) of camel collagen - Development of upper crust leathers from camel hides - Physical testing of leathers - Organoleptic properties - RESULTS AND DISCUSSION : Histological studies of camel hides using H & E staining - Effect of tanning on the fibre structure of camel hide using SEM - Characterization of camel hide : moisture, nitrogen and fat content - Estimation of collagen content - SDS-PAGE analysis - Circular dichroism analysis - Analysis of wet blue leathers - Physical testing of crust leathers En ligne : https://drive.google.com/file/d/1_faeDLWoA28x8P2iiXztw7r1bsUE6vWu/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31717 [article]

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Ultrastructural observations of skin samples obtained from various parts of animal and human body / P. L. Muthiah in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61 et 62 (Années 1977 et 1978)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 61 et 62 (Années 1977 et 1978) . - p. 11-16 Titre : Ultrastructural observations of skin samples obtained from various parts of animal and human body Type de document : texte imprimé Auteurs : P. L. Muthiah, Auteur ; A. S. Thambiah, Auteur ; N. Ramanathan, Auteur ; Y. Nayudamma, Auteur Année de publication : 1978 Article en page(s) : p. 11-16 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux de bovins Cuirs et peaux de chameaux Cuirs et peaux de chèvres Cuirs et peaux de moutons Peau -- analyse Peau humaine Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Skin samples obtained from various parts of the animal and human bodies have been investigated using the electron microscope techniques. This study shows that the structure of the entire skin of an animal is not of homogeneous nature. The variations followed a definite pattern suggesting a general classification of the various parts of the skin into flexible and non-flexible areas. From the electron microscopical observations, it may be summarised that some common features of skin samples obtained from flexible areas were as follows : presence of individual fibrils, considerable broken fibrils, increased periodicity and decreased diameter of the fibrils, sparse distribution of collagen fibrils in sections, presence of low amounts of amorphous materials, occurrence of circular structure on the surface of the skin. On the contrary non-flexible areas have the following common features : tendency in fibrils to form compact bundles, considerable amounts of intact fibril, comparatively decreased periodicity and increased diameter of the fibrils, close packing of collagen fibrils in sections, presence of large amounts of amorphous materials, and presence of figures resembling triangles and rhombuses on the surface of the skin. Note de contenu : - Human skin - Animal skin - Electron microscopy : Observation of fibrils - Observation of sections - Surface structure of the skins - Table : Variations in periodicity and diameter of collage fibrils obtained from different locations of hides and skins En ligne : https://drive.google.com/file/d/1NxTBf6BNYygCBd7VmpX3woYeJFoMZ22K/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31845 [article]

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Ultrastructural observations of skin samples obtained from various parts of animal and human body / P. L. Muthiah in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61, N° 1 (01-02/1977)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 61, N° 1 (01-02/1977) . - p. 11-16 Titre : Ultrastructural observations of skin samples obtained from various parts of animal and human body Type de document : texte imprimé Auteurs : P. L. Muthiah, Auteur ; A. S. Thambiah, Auteur ; N. Ramanathan, Auteur ; Y. Nayudamma, Auteur Année de publication : 1977 Article en page(s) : p. 11-16 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux de bovins Cuirs et peaux de chameaux Cuirs et peaux de chèvres Cuirs et peaux de moutons Peau -- analyse Peau humaine Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Skin samples obtained from various parts of the animal and human bodies have been investigated using the electron microscope techniques. This study shows that the structure of the entire skin of an animal is not of homogeneous nature. The variations followed a definite pattern suggesting a general classification of the various parts of the skin into flexible and non-flexible areas. From the electron microscopical observations, it may be summarised that some common features of skin samples obtained from flexible areas were as follows : presence of individual fibrils, considerable broken fibrils, increased periodicity and decreased diameter of the fibrils, sparse distribution of collagen fibrils in sections, presence of low amounts of amorphous materials, occurrence of circular structure on the surface of the skin. On the contrary non-flexible areas have the following common features : tendency in fibrils to form compact bundles, considerable amounts of intact fibril, comparatively decreased periodicity and increased diameter of the fibrils, close packing of collagen fibrils in sections, presence of large amounts of amorphous materials, and presence of figures resembling triangles and rhombuses on the surface of the skin. Note de contenu : - Human skin - Animal skin - Electron microscopy : Observation of fibrils - Observation of sections - Surface structure of the skins - Table : Variations in periodicity and diameter of collage fibrils obtained from different locations of hides and skins En ligne : https://drive.google.com/file/d/1NxTBf6BNYygCBd7VmpX3woYeJFoMZ22K/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31879 [article]

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