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Types and frequency of isolation of bacteria affecting leather surfaces from small nigerian ruminant dermatoses / G. D. Gbolagunte in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 94, N° 3 (05-06/2010)
[article]
Titre : Types and frequency of isolation of bacteria affecting leather surfaces from small nigerian ruminant dermatoses Type de document : texte imprimé Auteurs : G. D. Gbolagunte, Auteur ; J. O. Hambolu, Auteur Année de publication : 2010 Article en page(s) : p. 102-105 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bactéries -- Identification
Bactéries pathogènes
Cuirs et peaux -- Analyse
Cuirs et peaux de chèvres
Cuirs et peaux de moutons
Maladies bactériennes
Peau -- Maladies chez les animauxIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Sixteen genera of bacteria were isolated in varying frequencies from the skins of normal and disease afflicted live sheep and goats in Nigeria.
These were : Clostridium spp., Bacillus spp., Staphylococcus spp., Streptococcus spp., Micrococcus spp., Aerococcus spp., Actinobacillus spp., Gamella spp., Lactobacillus spp., Acinetobacter spp., Klebsiella spp., Listeria spp., Neisseria spp., Corynebacterium spp., Erysepelothrix spp., and Pseudomonas spp. Only one Streptococcus appeared on normal sheep skin. Bacillus spp., seemed more like the normal flora on the skins. Clostridium spp. appeared most frequently ; both on normal and diseased skins - appearing more on the latter and giving fillip to its being considered to be a near universal pathogen - skin residents becoming opportunistic with trauma. These caused ante-mortem damage to the skin and leather ; ultimately turning them into rejects. The study helps us to recommend efective animal husbandry with adequate prophylactic measures for Nigerian livestock, thus stemming serious economic losses.En ligne : https://drive.google.com/file/d/1UY4MK53L3s_NXfKfdEHsvF6pEZAxsV_5/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9623
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 94, N° 3 (05-06/2010) . - p. 102-105[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 012255 - Périodique Bibliothèque principale Documentaires Disponible 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]
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 humaineIndex. 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 skinsEn ligne : https://drive.google.com/file/d/1NxTBf6BNYygCBd7VmpX3woYeJFoMZ22K/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31845
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 61 et 62 (Années 1977 et 1978) . - p. 11-16[article]Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 008597 - Périodique Archives Documentaires Exclu du prêt 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]
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 humaineIndex. 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 skinsEn ligne : https://drive.google.com/file/d/1NxTBf6BNYygCBd7VmpX3woYeJFoMZ22K/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31879
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 61, N° 1 (01-02/1977) . - p. 11-16[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 007110 - Périodique Bibliothèque principale Documentaires Disponible Unhairing of goat skins by an alternative non-enzymatic and sulphide free process / Praveen Kumar Sehgal in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 80, N° 3 (05-06/1996)
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Titre : Unhairing of goat skins by an alternative non-enzymatic and sulphide free process Type de document : texte imprimé Auteurs : Praveen Kumar Sehgal, Auteur ; G. Ramamurthy, Auteur ; Chellappa Muralidharan, Auteur ; K. B. Gupta, Auteur Année de publication : 1996 Article en page(s) : p. 91-92 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux
Cuirs et peaux de chèvres
EpilageIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Goatskins have been unhaired using nickel carbonate instead of sodium sulphide. The skins were treated with a paste of 1 % nickel carbonate, 1 % sodium hydroxide, 3 % lime and a filler like kaolin or china clay plus water. The skins were covered and left for 16 h. at room temperature (28°C). The unhaired skins were further processed by conventional techniques and converted into crust leather. The results obtained are comparable with sulphide lime system in terms of duration and efficacy of the process. Unlike sodium sulphide unhairing, the skins unhaired with nickel carbonate have a natural colour and the crust leather was softer than the control leathers. En ligne : https://drive.google.com/file/d/1oXftqzG29Y8A9rzKgZcfwf3xF5GfwHhd/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8155
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 80, N° 3 (05-06/1996) . - p. 91-92[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 007010 - Périodique Bibliothèque principale Documentaires Disponible Use of ultrasound in soaking for improved efficiency / Venkatasubramanian Sivakumar in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 88, N° 6 (11-12/2004)
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Titre : Use of ultrasound in soaking for improved efficiency Type de document : texte imprimé Auteurs : Venkatasubramanian Sivakumar, Auteur ; G. Swaminathan, Auteur ; P. G. Rao, Auteur Année de publication : 2004 Article en page(s) : p. 249-251 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bains de trempe -- Analyse
Bains de trempe -- Teneur en chlorure de sodium
Bains de trempe -- Teneur en solides
Cuirs et peaux de chèvres
Déchets -- Elimination
Peaux brutes -- Trempe
Peaux salées
Solides
UltrasonsIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : The length of the soaking process plays a vital role in leather making; prolonged soaking may encourage putrefaction of the skin, thus there is a need to improve the efficiency of the soaking process. Power ultrasound has been employed with the aim of shortening process time.Two types of equipment were used, an ultrasonic cleaner (33 kHz) and an ultrasonic probe (20 kHz) in comparative experiments with static soaking. The efficiency of the soaking process was evaluated in terms of the removal of solids from wet-salted skin - a combination of salt, dirt, blood and soluble protein. We also studied the rate of water uptake of air-dried skins.
The results showed a 44% increase in solids removal by ultrasound in 1 hour soaking of wet salted goat skin. In the case of air-dried skins ultrasound reduced the soaking time by up to 75%. Analysis of the hydroxyproline content in the spent soak liquor indicates that the skin material is not adversely affected by ultrasound in soaking.
Efficiency of the soaking process has been evaluated from the removal of total solids from the wet-salted skin comprising salt, dirt, blood and soluble proteins. The rate of uptake of water in case of air-dried skins during the soaking process has also been studied ; the results show that soaking in the presence of ultrasound could reduce the soaking time by up to 75%.Note de contenu : - EXPERIMENTAL PROCEDURE : Ultrasonic set-up
- MATERIALS AND METHODS : Soaking of salted goat skin - Soaking of air-dried skin (based on air-dried skin weight)
- RESULTS AND DISCUSSION : Soaking of salted goat skin - Hydroxy proline content in spent liquor - Mechanisms for the improvement with ultrasound
- Table 1 : Total solids content in the spent liquor after 1 hour soaking of wetsalted goat skin both with and without ultrasound
- Table 2 : Sodium chloride content in the spent liquor after 1 hour soaking of wet-salted goat skin both with and without ultrasound
- Table 3 : Hydroxy proline analysis of spent soak, (Ultrasonic probe: 80W) at 30°C
- Table 4 : The effect of ultrasound (Ultrasonic probe: 100W) on water uptake in the soaking of air-dried goat skinEn ligne : https://drive.google.com/file/d/1gw-s2geYB2ZtGYH0KL2qhA59Q0FQQvpP/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39618
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 88, N° 6 (11-12/2004) . - p. 249-251[article]Waterborne dimethylolpropionic acid-diisocyanate adducts with alkali-deblockable isocyanate groups as pretanning agent for chrome tanning / Jie Liu in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CX, N° 2 (02/2015)
PermalinkWet-white based on an amphoteric polymer / Bi Shi in LEATHER INTERNATIONAL, Vol. 215, N° 4829 (04/2013)
PermalinkWet-white leather processing : a new complex combination tannage / Luo Jianxun in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 95, N° 3 (05-06/2011)
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