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675 : Technologie du cuir et de la fourrure |
Ouvrages de la bibliothèque en indexation 675
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Modified collagen hydrolysate, potential for use as a filler for leather / Wuyong Chen in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVI, N° 7 (07/2001)
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Titre : Modified collagen hydrolysate, potential for use as a filler for leather Type de document : texte imprimé Auteurs : Wuyong Chen, Auteur ; Peter H. Cooke, Auteur ; Gary L. DiMaio, Auteur ; Maryann M. Taylor, Auteur ; Eleanor M. Brown, Auteur Année de publication : 2001 Article en page(s) : p. 262-267 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Partially hydrolyzed collagen, previously extracted from chromium-containing leather waste, in which more than 50% of the fragments had molecular weights less than 21 kDa, was chemically modified with glutaraldehyde (0 to 18%). Glutaraldehyde, even at low concentration (6%), formed intermolecular crosslinks, as evidenced by a shift in the molecular weight distribution to higher weights. The 12% glutaraldehyde-hydrolysate protein (12% GHP) was used in a demonstration of leather filling. 12% GHP adhered better to chrome tanned calfskin from both back and flank areas than did 0% glutaraldehyde-hydrolysate (HP). To visualize the filling effect, 12% GHP and HP were labeled with a fluorescent dye, and treated leather samples evaluated by fluorescence microscopy. The results suggested a potential for this material as a filler for leather, but were difficult to interpret clearly. To better utilize the sensitivity of fluorescence techniques, additional experiments were performed using a low quality recovered gelatin (90 Bloom; more than 50% of the fragments had molecular weights less than 50 kDa). Gelatin was fluorescently labeled prior to crosslinking. Microscopy showed that in samples treated with 0% glutaraldehyde-gelatin, the fluorescence was localized on the inner surface of veins, whereas with 0.5% glutaraldehyde-gelatin the fluorescence filled the entire cross section of the vein. The results suggest that with appropriate treatment, the small fragment-proteinaceous material recovered from solid leather waste could be used in further leather production. En ligne : https://drive.google.com/file/d/1v4N2bVNaolS3DkQlyohVh1TBzum5k2se/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4369
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCVI, N° 7 (07/2001) . - p. 262-267[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 001565 - Périodique Bibliothèque principale Documentaires Disponible A modified method for fixation and staining of the elastic fibre in goatskin at the ultrastructural level / Ding Haiyan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 88, N° 1 (01-02/2004)
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Titre : A modified method for fixation and staining of the elastic fibre in goatskin at the ultrastructural level Type de document : texte imprimé Auteurs : Ding Haiyan, Auteur ; Liang Chengjian, Auteur Année de publication : 2004 Article en page(s) : p. 15-17 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux de chèvres
Fixation (chimie)
Matériaux -- Coloration
TaninsIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : This study describes an improvement to the tannic acid (TA) fixation technique. A comparison of the result of improved method with that of the conventional method and an en bloc staining method, shows that this method has a unique effect for characterizing the elastic fibres of goatskin. Moreover, their morphology is related to the concentration of TA, and the greatest effect occurs at a concentration of 0.01%. This method has furnished an effective means for researching the ultrastructural changes of elastic fibres in hides and skins in leather manufacturing and their pathological changes in the biology and medicine fields. Note de contenu : - Conventional method
- En bloc staining method
- Tannic acid fixation methodEn ligne : https://drive.google.com/file/d/1ZpUCq_PsD-yodx_qpX8O8WJtAyL_p0gR/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39650
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 88, N° 1 (01-02/2004) . - p. 15-17[article]Modified processing cockle defect in sheepskins / E. H. Bitcover in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXV (Année 1980)
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Titre : Modified processing cockle defect in sheepskins Type de document : texte imprimé Auteurs : E. H. Bitcover, Auteur ; H. J. Willard, Auteur ; A. L. Everett, Auteur Année de publication : 1980 Article en page(s) : p. 49-53 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : - Dewooling
- Reliming
- Bating
- PicklingNote de contenu : The cause of cockle defect in domestic sheepskins has been demonstrated. It is caused by keds (melophagus ovinus), which are blood-sucking parasites that live in the wool of sheep. The defect becomes apparent only after the wool is removed during processing. It appears as a scattering of dense nodules in the grain layer of sheepskins in a characteristic pattern of distribution. Affected sheepskin leathers can be seriously downgraded, depending on the severity of the defect. In addition, cockle reduces the physical strengh of both grain and suede leathers and increases their stiffness. Our earlier studies entailed special processing to expose the cockle nodules for easier counting. When subjected to certain process modifications, however, which were suggested by a cooperating tanner, sheepskins resulted that had lower apparent cockle counts and improved appearence. This paper describes certain process modifications which were found effective in attenuating some of the grosser defects in cockled sheepskins. En ligne : https://drive.google.com/file/d/1dzw6maIQs4fQ2BYG4WXDvuXXK0EXriw8/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17726
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXV (Année 1980) . - p. 49-53[article]Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 008513 - Périodique Archives Documentaires Exclu du prêt Modified smart collagen biomaterials for pharmacy and adhesive applications / Ján Matyasovsky in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXI, N° 10 (10/2016)
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Titre : Modified smart collagen biomaterials for pharmacy and adhesive applications Type de document : texte imprimé Auteurs : Ján Matyasovsky, Auteur ; Ján Sedliacik, Auteur ; Igor Novák, Auteur ; Peter Simon, Auteur ; Peter Jurkovic, Auteur ; Peter Duchovic, Auteur ; Angela Kleinová, Auteur Année de publication : 2016 Article en page(s) : p. 365-375 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Biomatériaux
Biopolymères
Collagène
Colles:Adhésifs
Comprimés
Préparations pharmaceutiques
Technique des plasmasIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Collagen has widespread use for preparation of cell cultures, dermal cosmetics, food and medicines, while achieving biocompatibility with the biological environment. Unmodified native collagen is relatively difficult to process for intended applications. This work presents potential application possibilities of modified collagen biopolymer for pharmacy and adhesive applications.
Firstly, the application possibilities of collagen in the system of controlled drug release were verified. Dissolution profile of the matrix Ambroxol hydrochloride and Venlafaxine confirmed potential of crosslinked and plasticized collagen as a pharmaceutical agent for the solid medicinal product. This product was prepared by direct compression with controlled drug release within the 8-11 hours with almost zero-order kinetics.
Secondly, low temperature plasma was applied to achieve the biocompatibility and to modify the film surface of the collagen type I. Collagen film was treated in two plasma environments ; low temperature plasma N2/H2 was used for grafting the amino groups and CO2 plasma ensured grafting the carboxyl groups. The surface functional groups of collagen were applied in further reactions (e.g., antimicrobial pretreatment with strong biocide properties). Functionalized collagen film provided stronger adhesion and compatibility. Prepared non-formaldehyde collagen thermoplastic adhesive was tested for the technical applications. The results have shown that the collagen adhesive bond gained high strength, flexibility and required strong gluing, e.g. books or wood veneered materials.Note de contenu : - EXPERIMENTAL : Materials and methods - Used drug and excipient : Ambroxol hydrochloride - Venlafaxine hydrochloride - Collagen BS - Collagen HS - Collagen K 12 - Ethylene vinyl acetate - Methocel - Measurement methods : Tablet pressing - Mechanical testing of tablets - Disintegration of tablets - Dissolution of tablets - Surface and adhesion properties of EVAc films with collagen - Plasma modification - ATR-FTIR spectroscopy measurements - Plywood preparation
- RESULTS AND DISCUSSION : Application of modified collagen in pharmacy - Non-crosslinked collagen hydrolysate as the tablet binder - Tests of controlled release of ambroxol from the tablet matrix - Surface and adhesion properties of the film sample with collagen - Surface and adhesion properties of collagen based thermoplastic hot-melt films - Determination of the bond quality of plywood boards with collagen filmsEn ligne : https://drive.google.com/file/d/1rpwqGlXtr2bK6lN5uetRB1sMM9yjke9u/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27022
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXI, N° 10 (10/2016) . - p. 365-375[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18365 - Périodique Bibliothèque principale Documentaires Disponible Modified thrublu chrome tanning for lambskins -Low residual - chrome tannages / Samir Dasgupta in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 88, N° 3 (05-06/2004)
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Titre : Modified thrublu chrome tanning for lambskins -Low residual - chrome tannages Type de document : texte imprimé Auteurs : Samir Dasgupta, Auteur Année de publication : 2004 Article en page(s) : p. 116-120 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Couleur
Cuirs et peaux -- Propriétés physiques
Cuirs et peaux d'agneaux
Oxazolidine
Tannage au chrome
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-SynthétiqueIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Chrome tanning has for a long time enjoyed a unique position amongst tanners all over the world and almost 90% of all leather produced is chrome tanned. The main reason for this relates to the following characteristics of chrome tanned leather :
- high shrinkage temperature/hydrothermal stability
- good flexibility
- excellent fastness properties
- lightweight and not too full
- good comfort characteristics
- good moulding and shape retention properties
High shrinkage temperature, unequalled by any other tannage, has been the paramount feature of these benefits in favour of chrome tanning.
A number of studies have been published recently suggesting that chromium (III) itself may be toxic at higher levels under certain ligand environments and also that chromium (VI) is a known carcinogen. In view of this tanners have to consider how best to modify their chrome tanning processes for better chrome exhaustion and also to look for means of minimising any impact on the environment.Note de contenu : - Optimal chrome tanning of lambskins
- Optimal chrome/ oxazolidine E combination tanning of lambskins : Modified ThruBlu system for lambskin tannage
- Table 1 : Effect of chrome offer (Cr2O3) on shrinkage temperature and chrome levels in leather and exhaust liquor
- Table 2 : Colour values of lambskins with different chrome offers
- Table 3 : Physical properties of chrome tanned leather with different chrome content
- Table 4 : Reduction of chrome in exhaust with oxazolidine E
- Table 5 : Comparative properties of chrome tanned leathers
- Table 6 : Colour of lambskin leatherEn ligne : https://drive.google.com/file/d/1U4kzZ9mIig1Rq0dZydh_ps1lnGr6WSOq/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39639
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 88, N° 3 (05-06/2004) . - p. 116-120[article]PermalinkPermalinkPermalinkPermalinkMoisture adsorption/desorption kinetics of bovine hide powder / Albert M. Manich in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 94, N° 1 (01-02/2010)
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PermalinkMoisture desorption characteristics of raw sheep and goat skins : A tool for eco-friendly method of preservation / D. Murugan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVIII, N° 2 (02/2013)
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PermalinkMoisture permeability of sheepskin : variation by the factors of temperature and humidity in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 104, N° 5 (09-10/2020)
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PermalinkMoisture sorption/desorption of collagen / Albert M. Manich in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CV, N° 7 (07/2010)
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PermalinkMoisture sorption isotherms of leather / Naïma Benmakhlouf in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 100, N° 2 (03-04/2016)
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PermalinkMold strains isolated from unfinished and finished leather goods and shoes / Meral Birbir in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXIX, N° 1 (01/1994)
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PermalinkMolecular dynamic simulation study on the effect of water on the thermal stability of collagen polypeptide / Wenhua Zhang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIV, N° 7 (07/2009)
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PermalinkMolecular identification of moderately halophilic bacteria and extremely halophilic archaea isolated from salted sheep skins containing red and yellow discolorations / C. Akpolat in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CX, N° 7 (07/2015)
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PermalinkMolecular interactions between type I collagen and metal complex : from computational modelling to experimental characterisation / Xiao Shiwei in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 102, N° 4 (07-08/2018)
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PermalinkA molecular level investigation of dialdehyde starch interaction with collagen for eco-friendly stabilization / Gladstone Christopher Jayakumar in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CX, N° 5 (05/2015)
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PermalinkMolecular level understanding of the stability difference in collagen induced by chromium sulfate and aluminum sulfate / Weimo Han in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 101, N° 6 (11-12/2017)
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PermalinkMolecular modeling of N-terminal telopeptides of bovine type I collagen / Phoebe X. Qi in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVII, N° 6 (06/2002)
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PermalinkMolecular modelling of tanning processes / Jens Fennen in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 82, N° 1 (01-02/1998)
PermalinkMolecular sieve chromatography / David S. Robinson in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 60 (Année 1976)
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PermalinkMolecular sieve chromatography / David S. Robinson in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 60, N° 2 (03-04/1976)
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PermalinkMolecular size and conformation of protein recovered from chrome shavings / Eleanor M. Brown in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXIX, N° 7 (07/1994)
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