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675 : Technologie du cuir et de la fourrure |
Ouvrages de la bibliothèque en indexation 675
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Studies of the mechanical behavior of partially processed leather / Geoffrey E. Attenburrow in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXIX, N° 12 (12/1994)
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Titre : Studies of the mechanical behavior of partially processed leather Type de document : texte imprimé Auteurs : Geoffrey E. Attenburrow, Auteur ; D. M. Wright, Auteur Année de publication : 1994 Article en page(s) : p. 391-402 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The mechanical properties or partially processed leather were measured as a function of moisture content in the range 10% to 67%. At high moisture contents the stress -strain curve had a characteristic 'J' shape with an initially low slope which increased again dramatically above a given strain. At lower values of moisture content the stress-strain curve acquired an 'S' shape with an initially high slope which reduced above 3% strain but increased again at higher strains. The initial set of the leathers following a period under 20% strain increased as their water content was reduced. It was also found that following release of the applied strain set reduced more rapidly in the wetter leathers.
When measured as a function of time of applied strain the amount of stress-relaxation which occured could be related to the degree of set. However stress-relaxation was found to vary in a complex way with moisture content and did not predict the dependence of set on moisture content.
It is conclued that the microstructural deformation mechanisms, that are responsible for set, change with moisture content.En ligne : https://drive.google.com/file/d/1zVKlVAEQErIlIFtQvnvmkIPKBDkh2Vwt/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8033
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXXIX, N° 12 (12/1994) . - p. 391-402[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 006925 - Périodique Bibliothèque principale Documentaires Disponible Studies of vegetable tannins. Characterisation of commercial chestnut tannin extract / H. R. Tang in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 80, N° 1 (01-02/1996)
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Titre : Studies of vegetable tannins. Characterisation of commercial chestnut tannin extract Type de document : texte imprimé Auteurs : H. R. Tang, Auteur ; R. A. Hancock, Auteur ; Anthony D. Covington Année de publication : 1996 Article en page(s) : p. 15-24 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : A combination of chromatography and spectroscopy has made it possible to reveal the major components of the commercially used chestnut (Castanea Sativa and vesc) tannin extract. Both cellulose and Sephadex LH-20 column were useful although the latter was more successful. Fast atom bombardment mass spectroscopy (FAB-MS) was used to identify individual components. Components of chestnut tannin extract were found having molecular mass range between 170 and 1850 daltons. An HPLC chromatogram showed that at least 17 major components were present in the chestnut extract. All components were derivatives of gallic acid ; no derivatives of catechin were found. En ligne : https://drive.google.com/file/d/1ceCXwlEL6dqtHaEzMTBlaVSrOnbMCWAb/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8195
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 80, N° 1 (01-02/1996) . - p. 15-24[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 007008 - Périodique Bibliothèque principale Documentaires Disponible Studies on 1,3-oxazolidine and 3-hydroxyethyl-1,3- oxazolidine as tanning agents / A. Gunasekaran in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 72 (Année 1988)
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Titre : Studies on 1,3-oxazolidine and 3-hydroxyethyl-1,3- oxazolidine as tanning agents Type de document : texte imprimé Auteurs : A. Gunasekaran, Auteur ; K. Balasubramanian, Auteur Année de publication : 1988 Article en page(s) : p. 25-26 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Oxazolidines are a new class of tanning agents which has been developed in recent years. The leathers obtained after treatment by oxazolidines are soft and light in colour. Oxazolidine, in combination with chrome, lead to a higher uptake of chromium than by treatment with chrome alone. A detailed study has been made in this field by preparing several oxazolidines and studying their tanning action using pickled sheepskin. Two of these, 1,3-oxazolidine and 3-hydroxyethyl-1,3-oxazolidine gave encouraging results. Studies were made with these oxazolidines and 3-hydroxyethyl-1,3-oxazolidine gave encouraging results.Studies were made with these oxazolidines to determine optimum concentration, pH of the bath and time required to obtain an improved result on pickled sheepskin. En ligne : https://drive.google.com/file/d/10M3I28f00gpAzkhUxeKDcIBQsqVsrQDb/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9091
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 72 (Année 1988) . - p. 25-26[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 007134 - Périodique Bibliothèque principale Documentaires Disponible Studies on alkaline protease from bacillus crolab MTCC 5468 for applications in leather making / Ammasi Ranjithkumar in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXII, N° 7 (07/2017)
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Titre : Studies on alkaline protease from bacillus crolab MTCC 5468 for applications in leather making Type de document : texte imprimé Auteurs : Ammasi Ranjithkumar, Auteur ; Jayanthi Durga, Auteur ; Ramakrishnan Ramesh, Auteur ; Victor John Sundar, Auteur ; Chellan Rose, Auteur ; Chellappa Muralidharan, Auteur Année de publication : 2017 Article en page(s) : p. 232-239 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Confitage Le confitage est une action biochimique effectuée au moyen de produits enzymatiques, qui a pour but de dégrader les fibres élastiques, contribuant ainsi à augmenter la souplesse du cuir. En outre, les enzymes complètent la dégradation des résidus épidermiques, donnant ainsi une fleur plus propre et plus lisse.
Cuirs et peaux -- Analyse
Cuirs et peaux de chèvres
Enzymes microbiennes
PeptidasesIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Bating has become an indispensable operation of leather making to obtain good quality leather. Alkaline proteases are commonly used in leather manufacture in the process of unhairing and bating of hides/skins. In this study, experiments were carried out to test the bating efficacy of a new alkaline protease obtained from Bacillus crolab MTCC 5468 and compared with commercial bate. Impact of alkaline protease on porosity of enzymatically and conventionally unhaired goat skins, have been compared. New enzyme treated pelt was free from scud and pigments, with fine, clean, white, silkier grain and pliable. The result was superior to that of commercial bate treated pelts. The pore size/distribution and water vapor permeability was better than commercial bate and conventionally unhaired skins. Scanning electron microscopy and histological analysis of pelt obtained from new alkaline protease based process reveals complete removal of scud and better opening up of collagen fibers. Moreover, the collagen was not damaged and resulted in good quality of leather. The physio- chemical studies conclusively show that among the experiments, the skins unhaired with new alkaline protease was better in comfort properties than the conventionally unhaired skins as inferred by porosity measurements. Using new alkaline protease for bating led to better results than commercial bate. The study indicates improved efficiency of bacterial alkaline protease in leather processing for beam house applications. Note de contenu : - MATERIALS AND METHODS : Materials - Methods - Qualitative analysis for efficiency of bating - Analysis of unhairing and bating spent liquor - Chrome liquor analysis - Water vapor permeability measurement - Capillary flow porometry analysis - Histological analysis - Scanning electron microscopic analysis - Shrinkage temperature of the wet blue leathers - Physical and organoleptic properties of leather
- RESULTS AND DISCUSSION : Qualitative analysis of bating - Protein content in unhairing and bating spent liquors - Water vapor permeability - Capillary flow porometry analysis - Scanning electron micrograph analysis - Histological analysis - Physical and organoleptic properties of leather - chrome contentEn ligne : https://drive.google.com/file/d/1Quyk6d9iv6UdGf9haqVeQgtytIIUdeo1/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28821
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXII, N° 7 (07/2017) . - p. 232-239[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19155 - Périodique Bibliothèque principale Documentaires Disponible Studies on chemical unhairing systems / Thomas C. Thorstensen in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXX (Année 1985)
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Titre : Studies on chemical unhairing systems Type de document : texte imprimé Auteurs : Thomas C. Thorstensen, Auteur ; Christian DuBost, Auteur Année de publication : 1985 Article en page(s) : p. 47-53 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Conventional lime-sulfide unhairing systems have the advantages of effective unhairing, consistent quality and low cost. The main disadvantage of the lime-sulfide unhairing system is the disposal of sulfide wastes.
Since environmental considerations have greatly altered the cost effectiveness of conventional lime-sulfide processes, an investigation was made of the practicality of alternate chemical systems.
The systems employed lime, caustic soda, reducing agents, and protein dispersants.
A number of unhairing systems resulted in hair loosening that could be satisfactory for hair saving systems. Of the systems studied, only sodium borohydride resulted in hair destruction.Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9247
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXX (Année 1985) . - p. 47-53[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 008085 - Périodique Bibliothèque principale Documentaires Disponible Studies on collagen structure using X-ray scattering on a closed-loop leather process / Yi Zhang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXV, N° 10 (10/2020)
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PermalinkStudies on enzymatic dehairing : Part III. Enzymatic depilation of pigskins modified by alkalisation / Barbara Felicjaniak in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 70 (Année 1986)
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PermalinkStudies on enzymatic dehairing : Part IV. Methods of preparing calfskins for enzymatic depilation / Barbara Felicjaniak in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 70 (Année 1986)
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PermalinkStudies on enzymatic unhairing : Part I. The influence of pigskin alkalisation on destruction of skin grain during depilation with pancreatic enzymes / Barbara Felicjaniak in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 69 (Année 1985)
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PermalinkStudies on enzymatic unhairing : Part II. The influence of alkalisation on the destruction of the grain of pigskins depilated with a bacterial enzymatic preparation / Barbara Felicjaniak in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 69 (Année 1985)
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PermalinkStudies on ethiopian sheep skins as an opportunity for value addition part I : histological, microscopic and chemical characterization of abyssinian and wanke sheepskins / H. Mohammed in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIX, N° 3 (03/2014)
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PermalinkStudies on incineration of chrome leather waste / Tetsuo Imai in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXVI, N° 8 (08/1991)
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PermalinkStudies on mono and divalent cations effects on hair immunization / Domenico Castiello in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CII, N° 11 (11/2007)
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PermalinkStudies on multicomponent spectroscopic analysis of dye solution / Marja Marjoniemi in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), LXXXVII, N° 7 (07/1992)
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PermalinkStudies on pesticides used for the protection of skins during storage and transportation. Part 1 / P. Golob in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 76, N° 3 (05-06/1992)
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PermalinkStudies on selective defect identification of crust leathers for computer-aided grading / S. Nithiyanantha Vasagam in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVIII, N° 6 (06/2013)
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PermalinkStudies on semi-metal tanning / Anthony D. Covington in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCIX, N° 12 (12/2004)
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PermalinkStudies on shoe climate contributing to comfort / Y. Nayudamma in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 54, N° 6 (06/1970)
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PermalinkStudies on solubilized sulfur dyes for coloring leather / R. Venba in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CX, N° 6 (06/2015)
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PermalinkStudies on the chemistry of syntans - Part II : chemistry of mixed condensation products / W. Madhu Latha in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 69 (Année 1985)
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PermalinkStudies on the correlation between surface and sewability properties of crust leather / C. Niklesh in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVIII, N° 5 (05/2023)
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PermalinkStudies on the defects and the economic losses on crust leather resulting from physical damage / K. E. E. Ibrahim in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. N° 71 (Année 1987)
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PermalinkStudies on the development of leathers from formaldehyde-free melamine syntan / Swarna Vinodh Kanth in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVII, N° 5 (05/2012)
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PermalinkStudies on the development of a multi-functional syntan / R. Nataraj in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIV, N° 7 (07/2009)
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PermalinkStudies on the effect of polyurethane finishing on the physico-mechanical properties of leather / Rajesh Kumar in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. N° 71 (Année 1987)
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