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Measurements of the initial strain energy of leather / Cheng-Kung Liu in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCII, N° 7 (09/1997)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCII, N° 7 (09/1997) . - p. 157-171 Titre : Measurements of the initial strain energy of leather Type de document : texte imprimé Auteurs : Cheng-Kung Liu, Auteur ; Michael D. Mcclintick, Auteur Année de publication : 1997 Article en page(s) : p. 157-171 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : This investigation was to establish an improved method to characterize the stiffness of leather associated with its resistance to a small deformation while taking into account the nonlinear viscoelasticity of leather. Stiffness was quantitatively determined for a specimen by measuring the energy needed to stretch it to 10 percent strain. This physical quantity, called initial strain energy,was observed to be define and measure than the tensile modulus. Using Box-Hunter's experimental design method a second order polynomial equation was derived for the relationship between initial strain energy and three major independent variables: moisture content, strainrate, and sampling angle. The breaking elongation was observed to decrease as initial starin energy increase, whereas the strength did not show a direct correlation with initial strain energy alone. However, regrassion analysis provided a significant statistical relationship between tensile stength and a parametre that incorporates the effects of strain energy, moisture content and strain rate. Thus, a prediction of tensile strength may become feasible based on measurements of initial strain energy without breaking the leather. En ligne : https://drive.google.com/file/d/1rykePnBJc6PbnQ47tlKv7l7kLPlbQNLc/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=7671 [article]

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Persistence of minority macromolecules of hide through the beamhouse. 2. Removal of collagen type 14 / Paul L. Kronick in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCII, N° 7 (09/1997)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCII, N° 7 (09/1997) . - p. 172-178 Titre : Persistence of minority macromolecules of hide through the beamhouse. 2. Removal of collagen type 14 Type de document : texte imprimé Auteurs : Paul L. Kronick, Auteur ; Susan K. Iandola, Auteur Année de publication : 1997 Article en page(s) : p. 172-178 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Collagen type 14, which is located on the surfaces of collagen fibrils of hide and skin, is a minority collagen that might play a role in leather drying. We show by immunohistological techniques that most of the non-helical portion of collagen type 14 is removed by lime. Unlike collagen type 6, it does not persist in the grain enamel. The triple-helical segments, however, might still persist, since these are not espected to react with the antibody stains used here. How type 14 collagen is removed might be an important feature of hide and grain quality in leather. En ligne : https://drive.google.com/file/d/1hOH_IHO2qmqKirlDFvIHPxVFgKXyre_1/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=7672 [article]

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