Accueil
Catégories
Ajouter le résultat dans votre panier Affiner la recherche
Etendre la recherche sur niveau(x) vers le bas
Collagen hydrolysate : Soluble skin applied in post-tanning processes : Part 2 - Interaction with acyrlic retanning agents / Carlos S. Cantera in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 86, N° 5 (09-10/2002)
[article]
Titre : Collagen hydrolysate : Soluble skin applied in post-tanning processes : Part 2 - Interaction with acyrlic retanning agents Type de document : texte imprimé Auteurs : Carlos S. Cantera, Auteur ; J. Martegani, Auteur ; G. Esterelles, Auteur ; Jorge A. Vergara, Auteur Année de publication : 2002 Article en page(s) : p. 195-202 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : acrylique, Acide L'acide acrylique ou acide acroléïque ou acide prop-2-énoïque est un composé organique de formule brute C3H4O2 et de formule semi-développée CH2=CHCOOH. C'est un acide carboxylique et un alcène vinylique, et se présente comme un liquide incolore à l'odeur âcre.
L'acide acrylique et ses esters, les acrylates, sont utilisés dans la fabrication de matières plastiques, dans les peintures acryliques et dans divers autres polyacryliques qui ont de multiples usages.
Agents de tannage
Copolymères
Cuir pleine fleur
Cuirs et peaux de bovins
Hydrolysat de collagène
Post-tannage
Tannage synthétiqueIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : In the upgrading of tannery solid wastes, the commercial application of the by-products obtained is the key to attractive technological alternatives.
In the particular case of chrome shavings hydrolysed by an alkaline-enzyme process, the uses of collagen hydrolysate (CH) are the driving force for the start-up of a project when consideration is given to the amounts generated and to the diversity of applications, in addition to the fact that basic chrome salts -obtained from the dissolution of the chrome cake - may be used as trouble-free assistants to the fresh tanning agent.
The present paper, which follows the Part I of this study ; "Collagen Hydrolysate : ‘soluble skin’ applied in post-tanning processes I. Characterisation” (JSLTC, 2000, 84,29) shows the experimental results obtained from the manufacture of various types of bovine leathers carried out at the CITEC pilot plant and in tanneries using CH in the post-tanning processes. In addition, the interactions of CH with acrylic retanning agents, studied at laboratory scale, are included.
CH performs in a synergistic fashion with various retanning agents. In addition to its cosmetic-lubricating effect which enhances the leather grain properties and provides greater softness improving the resistance of the fibrous tissue, there is also a ‘restoring effect’ upon the grain surface of the semi-finished leather, masking preservation defects and damage marks on the skin. The interaction with dyes is evident from the intensified colours and improved homogeneity of the dyeing.
CITEC has developed, besides CH, a copolymer CH-acrylic acid : "acrylic-protein" retanning agent MCH-106, that shows good properties in the development of full grain leather and splits. The application of the CH and the acrylic-protein MCH-106 in processing full-grain leather generates leathers of similar or higher quality to the standard one.
The application of CH in leather manufacture is an attractive response to the question of how to use the by-products derived from the treatment of the chrome shavings.Note de contenu : - EXPERIMENTAL DEVELOPMENT : Experiments at CITEC
- ANALYSIS OF THE RESULTS : CH application trials at the tannery
- Table 1 : Reduction in formic acid consumption in the 'mixture solutions' With regard to the sum of the individual values (expressed in %)
- Table 2 : Reduction in the salt KCr (SO4)2.12H2O consumption in the ‘mixture solutions’ with regard to the sum of the individual values (expressed in %)
- Table 3 : Physical properties of the upper leather prepared with acrylic-protein retanning agent MCH106 and CHEn ligne : https://drive.google.com/file/d/1ApP8ftPrxBi4iuQPgF3ZwC9qWN4r9ckE/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39859
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 86, N° 5 (09-10/2002) . - p. 195-202[article]Combined organic tanning based on mimosa and oxazolidine : development of a semi-industrial scale process for high-quality bovine upper leather / A. d'aquino in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 88, N° 2 (03-04/2004)
[article]
Titre : Combined organic tanning based on mimosa and oxazolidine : development of a semi-industrial scale process for high-quality bovine upper leather Type de document : texte imprimé Auteurs : A. d'aquino, Auteur ; N. Barbani, Auteur ; G. d'Elia, Auteur ; D. Lupinacci, Auteur ; Biagio Naviglio, Auteur ; Maurizia Seggiani, Auteur Année de publication : 2004 Article en page(s) : p. 47-55 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation
Cuirs et peaux de bovins
Mimosa et constituants
Oxazolidine
Réticulants
Tannage combinéLe tannage combiné se dit des tannages qui allient deux familles ou genre de tannage pour obtenir un résultat additionnant les qualités complémentaires des tannins mis en œuvre par exemple Chrome-Végétal ou Chrome-Synthétique
Tannage organiqueIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : In this study we present an industrial-scaled tanning process intended to replace chrome tanning in the production of high quality bovine shoe upper leathers using a combined tannage based on a mimosa and oxazolidine as crosslinking agent. This paper reports the best recipe developed and the properties of the leather obtained. The various test results and scanning electron microscopy (SEM) observations which were used as investigative methods to follow the tanning process steps and to better understand the cross-linking mechanisms, are detailed together with the characterisation of the effluents. The leather obtained is characterised by a good hydrothermal stability coupled with good physical and technical properties which allow it to easily comply with the standards required for high quality chromium-tanned bovine upper leather. The results obtained suggest that this tannage is a promising alternative to traditional chrome tanning. Note de contenu : - Interactions between the collagen structure, mimosa, and oxazolidine
- Laboratory scale investigation
- Semi-industrial scale investigation and properties of the crust leather
- SEM analysis
- Characterization of the exhaust bath of the mimosaoxazolidine tannage
- Table 1 : Pre-tanning and tanning agents used
- Table 2 : Steps of fatliquoring/dyeing process (offers: wt.% based on tanned weight)
- Table 3 : Steps of the Mimosa-Oxazolidine tanning process
- Table 4 : Steps of the Oxazolidine-Mimosa tanning process
- Table 5 : Pollutants in the exhaust bath of the mimosa-oxazolidine tannage compared with a typical chromium exhaust bathEn ligne : https://drive.google.com/file/d/18RDaXSoVzI-3FZsq97w_hp0jR9_xLdOu/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39641
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 88, N° 2 (03-04/2004) . - p. 47-55[article]Comparative analysis of the mechanical properties of cattle leather in different parts / Zhong Anhua in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 107, N° 4 (07-08/2023)
[article]
Titre : Comparative analysis of the mechanical properties of cattle leather in different parts Type de document : texte imprimé Auteurs : Zhong Anhua, Auteur ; Huang Zhuo, Auteur ; Zhou Meng, Auteur ; Chen Xiaoting, Auteur ; Fang Songchun, Auteur Année de publication : 2023 Article en page(s) : p. 145-147 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation
Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux de bovins
MicroscopieIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Because of its inherent growth, the cattlehide varies from one part to another. The purpose of this study is to test and analyse the mechanical properties of different parts of cattlehide. It was found that : the same piece of cattlehide has a large difference in mechanical properties in the transverse
direction and in the longitudinal direction. Fracture strength: neck > butt > belly, elongation at break : butt > belly > neck, tensile strength : butt > neck > belly. Fibre density is positively correlated with the fracture strength. The fibre density of the belly was 53% with poor bundling. The butt had a fibre density of 59%, with good bundling and large pores between fibres. The fibre density of the neck was 65%. There were small pores between fibres with loose fibre weaving, and disordered fibre arrangement. Differences in the structural shape of the fibres in the corium layer resulted in differences in the strength of the components.Note de contenu : - EXPERIMENTAL PROCEDURE : Experimental parameters - Experimental materials and apparatus
- RESULTS AND DISCUSSION : Analysis of the stress-strain curves for different parts - Comparison of the mechanical properties of different parts - Characterisation of different parts by microscopy - Microscopic molecular analysis of three partsEn ligne : https://drive.google.com/file/d/10XKMt60gISMkg8x5JmekXZjDw_sZgKs-/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39688
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 107, N° 4 (07-08/2023) . - p. 145-147[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 24155 - Périodique Bibliothèque principale Documentaires Disponible Comparative analysis of the proteomic profile of cattle hides that produce loose and tight leather using in-gel tryptic digestion followed by LC-MS/MS / Catherine Maidment in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXV, N° 11 (11/2020)
[article]
Titre : Comparative analysis of the proteomic profile of cattle hides that produce loose and tight leather using in-gel tryptic digestion followed by LC-MS/MS Type de document : texte imprimé Auteurs : Catherine Maidment, Auteur ; Meekyung Ahn, Auteur ; Rafea Naffa, Auteur ; Trevor Loo, Auteur ; Gillian Norris, Auteur Année de publication : 2020 Article en page(s) : p. 399-408 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Collagène
Cuir lache
Cuirs et peaux -- Analyse
Cuirs et peaux -- Défauts
Cuirs et peaux de bovins
Extraction (chimie)
Protéines
ProtéomiqueLa protéomique désigne la science qui étudie les protéomes, c'est-à-dire l'ensemble des protéines d'une cellule, d'un organite, d'un tissu, d'un organe ou d'un organisme à un moment donné et sous des conditions données.
Dans la pratique, la protéomique s'attache à identifier de manière globale les protéines extraites d'une culture cellulaire, d'un tissu ou d'un fluide biologique, leur localisation dans les compartiments cellulaires, leurs éventuelles modifications post-traductionnelles ainsi que leur quantité.
Elle permet de quantifier les variations de leur taux d'expression en fonction du temps, de leur environnement, de leur état de développement, de leur état physiologique et pathologique, de l'espèce d'origine. Elle étudie aussi les interactions que les protéines ont avec d'autres protéines, avec l'ADN ou l'ARN, ou d'autres substances.
La protéomique fonctionnelle étudie les fonctions de chaque protéine.
La protéomique étudie enfin la structure primaire, secondaire et tertiaire des protéines. (Wikipedia)
StatistiqueIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Looseness is a defect found in leather that reduces its quality by causing a wrinkly appearance in the finished product, resulting in a reduction in its value. Earlier studies on loose leather using microscopy and Raman spectroscopy reported a change in the collagen structure of loose leather. In this study, proteomics was used to investigate the possible molecular causes of looseness in the raw material, the first time such a study has been carried out. Proteins extracted from two regions of raw hide using two different methods were analysed; those taken from the distal axilla, an area prone to looseness, and those taken from the backbone which is less prone to looseness. Analyses using 1DE-LC-MS/MS showed that although the overall collagen concentration was similar in both areas of the hide, the distribution of the different types of collagen differed. Specifically, concentrations of type I collagen, and the collagen-associated proteoglycan decorin were lower in samples taken from the distal axilla, symptomatic of a collagen network with excess space seen for these samples using confocal microscopy. This study suggests a possible link between the molecular components of raw cattle hide and looseness and more importantly between the molecular components of skin and skin defects. There is therefore potential to develop biomarkers for looseness which will enable early preventative action. Note de contenu : - EXPERIMENTAL : chemicals - Sample preparation - Protein extraction - Protein digestion - LC-MS/MS - Protein identification - Statistical analysis - Total collagen concentration - 3D confocal microscopy
- RESULTS AND DISCUSSION : Proteomic profiles : a comparison of the extraction methods - Differences between the OSP and DA regions of raw cattle hide
- Table 1 : Proteins that are significantly down regulated in the DADOI : https://doi.org/10.34314/jalca.v115i11.4184 En ligne : https://drive.google.com/file/d/1ve1EQeASe3mqkTpkqz0ZFQG6fgEMbxns/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34846
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXV, N° 11 (11/2020) . - p. 399-408[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 22419 - Périodique Bibliothèque principale Documentaires Disponible A comparative morphology of kangaroo and bovine leathers / J. H. Bavinton in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXII (Année 1987)
[article]
Titre : A comparative morphology of kangaroo and bovine leathers Type de document : texte imprimé Auteurs : J. H. Bavinton, Auteur ; D. E. Peters, Auteur ; L. J. Stephens, Auteur Année de publication : 1987 Article en page(s) : p. 197-199 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cuirs et peaux -- Analyse
Cuirs et peaux de bovins
Cuirs et peaux de kangourous
Morphologie (matériaux)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Collagen fibre bundles, which are the structural components of skin and leather, are organized in a variety of ways. Each species of animal has a characteristic arrangement, although in many cases they are similar. In animals which are commonly used for leather production, such as cattle and sheep, the arrangement of the fibre bundles has been well studied, and the existence of a relationship between the fibre bundle orientation and the physical properties of the leather is recognized. Diseases of the collagen may also have a profound effect on skin strenth. The strength of leather depends therefore on the arrangement of the collagen fibre bundles and, presumably also on the strength of the collagen itself.
Although kangaroo leather has not been studied to the same extent as the more commonly used leathers, recent studies on its physical properties and stratigraphic strength analysis have shown that there are differences between kangaroo and other leathers. To ensure that full use may be made of its capabilities, a better understanding of its structure is needed. This paper reports a histological study of kangaroo leather and compares it with bovine leather.En ligne : https://drive.google.com/file/d/1DG1ODE2PPey865TN7K87_gDWewPiwa55/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8994
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXXII (Année 1987) . - p. 197-199[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 008087 - Périodique Bibliothèque principale Documentaires Disponible Comparative study of moisture permeability of three natural leathers / Zhong Anhua in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 104, N° 6 (11-12/2020)
PermalinkComposition, structure and properties of immunized hair from hair-saving unhairing process / Kong Lili in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 99, N° 3 (05-06/2015)
PermalinkConsidération pratiques sur un procédé de tannage pour cuir à semelles, utilisant dès le début des solutions tanniques concentrées sans aucun prétannage préalable / Constantin Ionescu in REVUE TECHNIQUE DES INDUSTRIES DU CUIR, Vol. LXI (Année 1969)
PermalinkContribution à l'étude viscométrique en solutions diluées de collagène acido-soluble d'origine bovine / Jean-Claude Ronzon / 1987
PermalinkCountry-level life cycle assessment of carbon footprint in processing of bovine upper leather / Mianhong Chen in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIV, N° 6 (06/2019)
PermalinkPermalinkCuirs et peaux. Classement des peaux brutes de bovins fraîches et salées d'après l'aspect et la masse - Norme NF 51-001 / Association Française de Normalisation (Paris) / Saint-Denis La Plaine : Association Française de Normalisation (AFNOR) (1970)
PermalinkCuirs et peaux. Mode de présentation des peaux brutes de bovins et d'équidés - Norme NF G 53-001 / Association Française de Normalisation (Paris) / Saint-Denis La Plaine : Association Française de Normalisation (AFNOR) (1970)
PermalinkDecoding source of leather odor : a quantitative analysis with heracles NEO / Haonan Shi in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIX, N° 4 (04/2024)
PermalinkDesign of a prototype to produce a new collagen material by dehydration / Lluis Ollé in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 97, N° 6 (11-12/2013)
PermalinkDevelopment of a new leather intermediate : wet-bright with a high dye affinity / Anna Bacardit in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXI, N° 3 (03/2016)
PermalinkDevelopment of a technology for no-soak liming of salted hides and for minimal chrome tannage / J. H. Sharphouse in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXIV (Année 1979)
PermalinkDiffusion and reaction behavior of proteases in cattle hide matrix via FITC labeled proteases / Jianzhong Ma in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIX, N° 5 (05/2014)
PermalinkDistribution of lipid classes with respect to area and stratigraphic location in a steerhide / E. H. Bitcover in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXI (Année 1966)
PermalinkEco-friendly chrome tanning of leather using ultrasound technique / Mohamed Abu Sayid Mia in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIX, N° 2 (02/2024)
Permalink