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675 : Technologie du cuir et de la fourrure |
Ouvrages de la bibliothèque en indexation 675
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Effects of level and length of supplementation on leather characteristics of yearling boer and spanish wethers / R. C. Merkel in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVIII, N° 4 (04/2013)
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Titre : Effects of level and length of supplementation on leather characteristics of yearling boer and spanish wethers Type de document : texte imprimé Auteurs : R. C. Merkel, Auteur ; Cheng-Kung Liu, Auteur ; Nicholas P. Latona, Auteur ; A. El Amma, Auteur ; A. L. Goetsch, Auteur Année de publication : 2013 Article en page(s) : p. 139-145 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Allongement (mécanique)
Allongement à la rupture
Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux de chèvres
Cuirs et peaux de moutons
Epaisseur -- Mesure
Essais dynamiques
Glutaraldéhyde
Tannage au chrome
Traction (mécanique)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Thirty Boer × Spanish and 29 Spanish wethers were used in a trial to determine the effects of goat breed, supplementation level, and age on the mechanical properties of chrome-tanned and glutaraldehyde-tanned goat skin. Six Boer and five Spanish wethers were harvested at the beginning of the trial with the remaining animals assigned to four groups, having equal breed numbers, receiving either a high or low supplement amount daily. Two groups were harvested after 110 days and the remaining groups after an additional 108 days. Skins were removed by hand, split down the dorsal midline, and salted. The left half of each skin was chrome-tanned and the right half was tanned using a glutaraldehyde based tannage. Tanning goat skins using chromium resulted in stronger leather than that produced using glutaraldehyde. Increasing age led to decreased % elongation and increased leather stiffness. The effects of supplementation level were of lesser importance than tannage or age upon the strength characteristics of leather produced. Boer goat leather was thicker than Spanish goat leather, although tensile strength was unaffected by breed. Goat skins were not shaved to an equal thickness during the tanning process, perhaps leading to some of the breed differences seen, notably in % elongation and fracture energy. Therefore, further research is needed to evaluate characteristics of shaved skins. Note de contenu : - MATERIALS AND METHODS : Animals and treatments - Harvest and tannage measures - Leather testing - Statistical analyses
- RESULTS : Feedstuffs - Live and fresh skin weight - Leather thickness - % elongation - Fracture energy - Tensile strength - Young's modulusEn ligne : https://drive.google.com/file/d/1iIJDgwQvY0tbO_HB0Lisk7bM6NYH_IM7/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18089
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CVIII, N° 4 (04/2013) . - p. 139-145[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 14980 - Périodique Bibliothèque principale Documentaires Disponible Effects of moisture content on leather / Creative Leather Technologies (Northampton, United Kingdom) in LEATHER INTERNATIONAL, Vol. 214, N° 4818 (03/2012)
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Titre : Effects of moisture content on leather Type de document : texte imprimé Auteurs : Creative Leather Technologies (Northampton, United Kingdom), Auteur Année de publication : 2012 Article en page(s) : p. 30-32 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Effets de l'humidité Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : One of leather's many wonderful properties is its ability to absorb moisture ; this is one of the reasons why it is the best material for footwear ; it absorbs moisture from our feet and keeps, them cool and comfortable. However, this moisture absorbing ability can also have a profound effect on the behaviour of the leather in a variety of different ways. These effects have been the subject of many research projects, which have shown that the science behind them is complex and beyond the scope of this article, so we will be looking more at the practical relevance of the effects of moisture in leather. Note de contenu : - Effect on area
- Changes in elasticity
- Changes in shape
- Testing on leatherEn ligne : https://drive.google.com/file/d/1iDikiqpsgxWnpyEEQAA_DKHR9MxcLsa6/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=14072
in LEATHER INTERNATIONAL > Vol. 214, N° 4818 (03/2012) . - p. 30-32[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13783 - Périodique Bibliothèque principale Documentaires Disponible Effects of neutral salts on collagen structure and chromium-collagen interactions / Eleanor M. Brown in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCIV, N° 2 (02-03/1999)
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Titre : Effects of neutral salts on collagen structure and chromium-collagen interactions Type de document : texte imprimé Auteurs : Eleanor M. Brown, Auteur Année de publication : 1999 Article en page(s) : p. 59-67 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Tanning, the multi-step process whereby complex salts of Cr(III) crosslinking collagen fibrils, is more an art form than a science and the mechanism of the chromium-collagen interaction is poorly understoos. The long range goal of this research is to develop an experimental model with which to study the interactions of Cr(III) with collagen that are characteristic of tanning. In the present study, the thermal stability of acid soluble collagen from bovine skin is studied by circular dichroism spectropolarimetry. The melting curve for the triple helix of calf skin collagen in 0.05 M acetic acid was analyzed in terms of a pre-transition followed by complete denaturation, with a characteristic Tp=34.0°C Td=40.7°C. For pepsin solubilized, adult bovine dermal collagen, slightly lower denaturation temperatures were observed - Tp=31.0°C, Td=37.7°C probably due to the removal of the nonhelical telopeptides in the solubilization of adult skin collagen. The addition of salts, NaCl or KCl, initially had a destabilizing effect on the triple helix, lowering both Tp and Td nearly in parallel. At low concentrations of Nacl, preferential binding occured with apparent dissociation constants Kd(Tp)=0.034 M and K(Td)=0.017 M for calf skin collagen at 1 mg/mL in 0.05 M acetic acid, suggesting the possibility of site preferential interactions contributing to the observed melting behavior. As the salt concentration was increased between 0.1 M and 0.5 M, little further destabilization was observed, Tp and Td became indistinguishable. At 0.4 M NaCl (0.5 M KCl)the samples began to gel. Here, water-structuring effects may play a role. In contrast, under conditions of the model tanning system, where Cr(III) was added at pH 2 and the pH was then adjusted to 4.5 with bicarbonated, the "tanned" collagen gelled at a salt concentration of 0.1 M. Note de contenu : - EXPERIMENTAL : Materials - Spectroscopy - Simulated tanning procedure
- RESULTS : Characterization of soluble collagen - Effects of salts - Simulated tanningEn ligne : https://drive.google.com/file/d/10YW7UOTUD3Ga7f-kWr2fVXz-7Xsp_wEj/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4489
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCIV, N° 2 (02-03/1999) . - p. 59-67[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 006972 - Périodique Bibliothèque principale Documentaires Disponible Effects of PAA on the different scales of leather structure / Zou Xianglong in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 102, N° 5 (09-10/2018)
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Titre : Effects of PAA on the different scales of leather structure Type de document : texte imprimé Auteurs : Zou Xianglong, Auteur ; Chai Yuye, Auteur ; Lan Yunjun ; Li Zhongyu Année de publication : 2018 Article en page(s) : p. 251-253 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acide polyacrylique
Cuir -- Séchage
Fibrilles de collagèneLa fibrille de collagène est une structure constituée d'un assemblage de fibres de tropocollagène (assemblage de 3 protéines de collagène alpha (alpha 1 - alpha 1 - alpha 2) en une hélice droite.
RetannageIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : In this article, the topology of fibrils and the aggregate structure of leather fibres were characterised by TEM and SEM to reveal the effects of PAA on the different scale of the structure of leather. The results show that PAA has little influence on the collagen molecules array and collagen fibres aggregate structure in the wet state. But, during air-drying PAA observably influences the collagen fibres aggregate structure. After being PAA retanned, the air-dried leather fibres become thinner and the space between fibres increases. Note de contenu : - MATERIALS AND METHODS
- RESULTS AND DISCUSSION : Effect of PAA on the array of collagen molecules - Effect of PAA on the array of collagen fibres
- Fig. 1 : TEM images of collagen fibrils ; no retanning and PAA retanning
- Fig. 2 : SEM images of freeze drying collagen fibres : no retanning and PAA retanning
- Fig. 3 : SEM images of air drying collagen fibres : no retanning and PAA retanningEn ligne : https://drive.google.com/file/d/1QZzoJ4QwM2kSxzcDjTnZOzrUmZTcUiJ1/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31110
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 102, N° 5 (09-10/2018) . - p. 251-253[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20281 - Périodique Bibliothèque principale Documentaires Disponible Effects of polyacrylic acid on the structure of collagen fibre / Zou Xianglong in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 98, N° 4 (07-08/2014)
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Titre : Effects of polyacrylic acid on the structure of collagen fibre Type de document : texte imprimé Auteurs : Zou Xianglong, Auteur ; Lan Yunjun, Auteur ; Zhang Qinghua, Auteur ; Li Zhongyu, Auteur ; Zhang Xiaoli, Auteur Année de publication : 2014 Article en page(s) : p. 172-176 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acide polyacrylique
Analyse thermique
Collagène
Cuirs et peaux de moutons
Diffractométrie de rayons X
Microscopie électronique à balayage
Microscopie électronique en transmissionIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : The effects of polyacrylic acid (PAA) on the hierarchical structure of sheepskin collagen fibres were investigated by using of transmission electron microscope (TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD) and differential scanning calorimetry (DSC). It was found that although the unique axial periodic (d periodicity) structure of collagen fibrils and orderly arrangement of collagen molecule did not change obviously alter the introduction of PAA, the aggregation behaviour of collagen fibres was greatly influenced. With increasing concentration of PAA, the order of intermolecular lateral packing decreased, the shrinkage of the leather lessened [from changes in surface morphology observed by SEM] and the dry heat stability of collagen fibre declined due to a decrease in the orderly degree of collagen fibre aggregation. Note de contenu : - MATERIALS AND METHODS : Materials - Synthesis of PAA - Experimental procedure and characterization
- RESULTS AND DISCUSSION : TEM - SEM - XRD - DSCEn ligne : https://drive.google.com/file/d/1Kql2Xrhdh5La-mewKh0DfUdKNDtREK84/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21818
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 98, N° 4 (07-08/2014) . - p. 172-176[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 16445 - Périodique Bibliothèque principale Documentaires Disponible Effects of some important ectoparasites on the grain quality of cattlehide leather / A. L. Everett in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXII (Année 1977)
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PermalinkEffects of stretching and drying rate on the mechanical properties of chrome-free Leather / Cheng-Kung Liu in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CI, N° 9 (09/2006)
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PermalinkEffects of thickness and gain on the amplitude of airborne ultrasonics / Cheng-Kung Liu in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIX, N° 3 (03/2014)
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PermalinkEffects of vacuum drying variables on the mechanical properties of leather / Cheng-Kung Liu in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVI, N° 7 (07/2001)
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PermalinkEfficacy of antimicrobial agent containing sodium dimethyldithiocarbamate against halobacterium salinarum, haloarcula salaria and haloarcula tradensis causing red heat on salted sheepskins / Pinar Caglayan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 106, N° 4 (07-08/2022)
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PermalinkEfficacy of aqueous solution of N-halamine to reduce microbiological contamination on cattle hides for meat safety with byproduct quality assurance / Majher I. Sarker in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXV, N° 9 (09/2020)
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PermalinkEfficacy of usnea sp. extracts in preventing biofilm formation by bacillus species isolated from soaking liquor samples / Didem Berber in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXV, N° 6 (06/2020)
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PermalinkEfficient and eco-friendly beamhouse chemicals / Franck Diaz in LEATHER INTERNATIONAL, Vol. 213, N° 4811 (06/2011)
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PermalinkEfficient and ecological leather processing : replacement of lime and sulphide with dispase assisted by 1-allyl-3-methylimidazolium chloride / Hui Liu in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 4 (Année 2022)
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PermalinkEfficient removal of ammonia-nitrogen from deliming effluent by using magnesium ammonium phosphate precipitation method / Hao Wang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVII, N° 3 (03/2022)
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PermalinkEfficient salt recovery and total dissolved solids reduction in leather processing / Vasudevan Preethi in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CI, N° 4 (04/2006)
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PermalinkEfficient synthesis of chloromethylthiocyanate for use in fungicide production / L. Muthusubramanian in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 87, N° 3 (05-06/2003)
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PermalinkEfficient utilisation of steam / A. Armer in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 67 (Année 1983)
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PermalinkPermalinkEffluent treatment from tannery buffing dust / J. D. Putshak'a in LEATHER INTERNATIONAL, Vol. 213, N° 4808 (04/2011)
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