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Hide and leather characteristics of afrikaner and friesland bulls and steers slaughtered at various ages between birth and 24 months / Alan E. Russell 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. 1-10 Titre : Hide and leather characteristics of afrikaner and friesland bulls and steers slaughtered at various ages between birth and 24 months Type de document : texte imprimé Auteurs : Alan E. Russell, Auteur ; A. C. Galloway, Auteur ; R. L. Boccard, Auteur ; R. T. Naudé, Auteur Année de publication : 1977 Article en page(s) : p. 1-10 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bovins -- Races Caractérisation Cuirs et peaux -- Analyse Cuirs et peaux de bovins Mesures de rendement Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Investigation of the influence of breed, sex and age factors on hide and leather characteristics indicates that when young Afrikaner and Friesland bulls and steers are reared under intensive feedlot conditions, bulls have a higher yield of green hide mass than steers and exhibit more favourable leather properties than steers, especially with regard to tensile strength in Friesland bulls. With the onset of sexual maturity in bulls after 12 months of age, accompanying changes in leather physical properties were apparent and tensile strength showed a decline particularly in Friesland bull leathers. These changes in hide physical properties appear to parallel increases in the level of natural crosslinking of the collagen molecular structure during ageing and maturation. Main differences between the two breeds studied were that Afrikaner animals were superior in terms of hide and leather yield whereas the leather of Friesland cattle was qualitatively superior. Note de contenu : - EXPERIMENTAL : Yield measurements - Leather physical tests - RESULTS : Yield measurements - Leather physical tests En ligne : https://drive.google.com/file/d/1FtMtn1fZb-Y9MSws82wym_0sEszL0Hjr/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31878 [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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Practical salt-free curing / J. B. Sladen 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. 17-20 Titre : Practical salt-free curing Type de document : texte imprimé Auteurs : J. B. Sladen, Auteur Année de publication : 1977 Article en page(s) : p. 17-20 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chlorure de sodium Le chlorure de sodium est un composé chimique de formule NaCl. On l'appelle plus communément sel de table ou de cuisine, ou tout simplement sel dans le langage courant. C'est le principal produit dissous dans l'eau de mer ; on l'appelle alors sel marin. On l'obtient : dans des marais salants par évaporation de l'eau de mer, dans des mines, par extraction du sel gemme (halite) ou en le synthétisant lors de réactions à hautes températures entre du dichlore (Cl2) et du sodium métallique (Na). Le chlorure de sodium est utilisé dans l'industrie chimique pour produire du chlore, de la soude caustique et de l’hydrogène. Cuirs et peaux -- Industrie -- Aspect de l'environnement Eaux usées -- Epuration Eaux usées -- Recyclage Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Everyone is now accustomed to the necessity for water to be recycled as a means of improving the productivity of what is, after all, a limited national resource. Water-treatment chemists have made use of various chemical reactions and biological processes to purify water from cations such as ammonium, magnesium and calcium, and common anions such as phosphates, nitrates and sulphate, but sodium cations and chloride anions are quite intractable, and pals through effluent treatment plants unchanged. There is therefore considerable pressure to limit the discharge of these ions anywhere inland in South Africa, so as not to raise the salinity of our main rivers. It is obvious that control of the discharge of sodium chloride itself is the very first step in limiting sodium and chloride ions. We can derive some idea of the potential salt run-off from this studv. Note de contenu : - Table 1 : South African abattoir, curer and tannery statistics 1975 - Table 2 : Early preservation trials (% added of green mass) - Table 3 : Trials at king tanning, december 1975 - Table 4 : Uptake of busan 30-I and boric acid during trial I - Table 5 : Uptake of busan 30-I and boric acid during trial II - Table 6 : Probable concentration of preservatives in five trials to date (% of green mass actually absorbed) En ligne : https://drive.google.com/file/d/10wQ1Ps_NfJsp4Zrr7ojHqbwKu1Wzs8L1/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34117 [article]

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