Action of pancreatin on residual epidermis of goatskin-examination via histological changes during bating / Ding Haiyan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 89, N° 4 (07-08/2005)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 89, N° 4 (07-08/2005) . - p. 141-144 Titre : Action of pancreatin on residual epidermis of goatskin-examination via histological changes during bating Type de document : texte imprimé Auteurs : Ding Haiyan, Auteur ; Liegang Sun, Auteur ; Liang Chengjian, Auteur Année de publication : 2005 Article en page(s) : p. 141-144 Note générale : Bibliogr. Langues : Anglais (eng) 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 Epiderme Pancréatine Peau -- Histologie Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The histological changes of the epidermis of goatskin under different bating conditions were observed at the ultrastructure level by TEM and SEM. The results showed that the residual epidermal matter was obviously removed from the surface of delimed pelt by pancreatin in the normal bating process and this action will be strengthened by both an increase of the amount of pancreatin and by prolonging the bating time. Evidence is provided of the function of pancreatin in bating, eliminating scud and clarifying the grain surface. Note de contenu : - Sample preparation - Sampling and fixation - Specimen preparation for TEM - Specimen preparation for SEM En ligne : https://drive.google.com/file/d/1QycDHpTwbj8x1N0qDVsipv-7Dub3lvSU/view?usp=share [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39244 [article]

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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)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 88, N° 1 (01-02/2004) . - p. 15-17 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 Tanins Index. 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 method En ligne : https://drive.google.com/file/d/1ZpUCq_PsD-yodx_qpX8O8WJtAyL_p0gR/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39650 [article]

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The action of pancreatin on collagen fibres and interfibrillary substance during bating / Ding Haiyan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 90, N° 2 (03-04/2006)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 90, N° 2 (03-04/2006) . - p. 47-53 Titre : The action of pancreatin on collagen fibres and interfibrillary substance during bating Type de document : texte imprimé Auteurs : Ding Haiyan, Auteur ; Liang Chengjian, Auteur Année de publication : 2006 Article en page(s) : p. 47-53 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chimie analytique Collagène 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 de chèvres Hydrolyse Hydroxyproline Pancréatine Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : In order to illustrate the functions of pancreatin in the bating process during leather manufacture, we used TEM and SEM to observe the histological changes of collagen fibres of goatskin at the ultrastructural level under different bating conditions. Chemical analysis was simultaneously used to illustrate the action of pancreatin on interfibrillary substance and collagen protein. The results showed that the interfibrillary substance was removed and the collagen fibre structure was moderately opened-up under normal bating conditions. The removal of the interfibrillary substance aids in the opening-up of the collagen fibre structure. Pancreatin has an obvious hydrolytic effect on mucin, mucoid and collagenous substance too. Excessive concentrations of pancreatin are beneficial to the removal of non-fibrous substance, i.e., the interfibrillary substance but, this excessive treatment can cause loss of collagen protein and damage of the collagen fibres making the collagen fibre structure over opened-up. Thus in conditions with excess pancreatin, the final result may be leather with an empty handle. This study provides a basis of ultrastructure and serves as scientific guidance for selection of chemicals and technique design for goat shoe upper leather manufacture and offers a reference to other related studies. Note de contenu : - EXPERIMENTAL METHODS : Sample preparation - Sampling and fixation - Specimen preparation for TEM and SEM - Determination of hydroxy-proline - Determination of reducing sugar(R.S.) - RESULTS AND DISCUSSION : The removal of the interfibrillary substance during the bating process - Comparison of the opening-up of the collagen fibre structure and change of collagenous fibrils under various - The hydrolyzing effect of pancreatin on collagenous substance bating systems - Table 1 : Bating scheme - Table 2 : The R.S. hydrolyzed from skin during the different bating process - Table 3 : The quantity of hydroxyproline in the liquors after bating process En ligne : https://drive.google.com/file/d/1LuTBW1LRMkRp_DFx43EjM--trENxKJ7M/view?usp=share [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39156 [article]

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