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Model of the helical portion of a type I collagen microfibril / Eleanor M. Brown in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCII, N° 1 (01/1997)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCII, N° 1 (01/1997) . - p. 1-7 Titre : Model of the helical portion of a type I collagen microfibril Type de document : texte imprimé Auteurs : Eleanor M. Brown, Auteur ; Gregory King, Auteur ; James M. Chen, Auteur Année de publication : 1997 Article en page(s) : p. 1-7 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Collagen model - Collagens are an ubiquitous family of extracellular proetins in the animal world. Fibril-forming collagen in the animal world. Fibril-forming collagens are the major structural proteins. In addition to their biological function, collagens provide molecular frameworks that are utilized in the medical, food biological and technological, is a consequence of the basic structure of a protein. Computerized molecular modeling has been developed into a useful tool for visualizing structure-function relationships in proteins. The unique supramolecular characteristics of collagen have made it a suitable subject for model builders over more than thirty years. The bovine type I collagen microfibril model developed at ERRC now consists of 15 polypeptide chains of 315 amino acid residues each. This model is large enough to allow a comparison of its gross structurla features with the banding patterns obtained by electron microscopy. Measurable distances pertaining to the helix, triple helix, and microfibril are within experimetnal error of recently reported physical data on dried collagen samples. Two segments of the microfibril model, one rich in hydrophobic residues and the other rich in hydrophilic residues were examined in detail. The conformation of the hydrophobic segment more nearly matched the definitionb of collagen helix (57 %) than did the conformation of the hydrophilic segment (38 %). The model is potentially useful for studying mechanisms of both inter- and intra-microfibril crosslinking as well as for predicting the efficacy of specific modifications to the molecule or potential crosslinking agents. En ligne : https://drive.google.com/file/d/1x-LS4Y5scR6nNr71oaivn42_aARwpoD9/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9083 [article]

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Methods for improved process control in the leather industry / Rodney Stosic in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCII, N° 1 (01/1997)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCII, N° 1 (01/1997) . - p. 8-16 Titre : Methods for improved process control in the leather industry Type de document : texte imprimé Auteurs : Rodney Stosic, Auteur ; Amanda Bugby, Auteur ; Ian Gaffron, Auteur ; Rachel Garwood, Auteur Année de publication : 1997 Article en page(s) : p. 8-16 Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Process control - Recent years have seen vast improvements in process control within the tanning industry. These imporvements extend back down the supply chain to the farm and forward to the leather user.These changes stem from a better awareness of economic requirements and changes in market demands. There is a trend for industry in general to work or conform to quality standards. These include surch managemement systems as Total Quality Management (TQM), ISO 9000 and to a lesser extend 'just in time' management. Whether you believe in these types of systems, or even in the philosophy behind them, it is likely that they are in operation with the supply chain in which you function. Whatever the case, the leather industry is rapidly evolving from what has traditionally been considered a dirty, low tech industry to one which is dynamic and environmentally aware. The industry is utilizing the latest management methods and production techniques. As the demand for still tighter controls over processing increases, so must the technology used to monitor the processes improve. BLC is operating a number of projects which aim to develop instruments or methods for better process control. These include the use of an 'electronic nose' for the early detection of raw-stock putrefaction, a device for monitoring pH and temperature within a closed vessel, and methods for improving the consistency and quality of wet blue grading. This paper discusses approaches being investigated at BLC to improve process control and hence serve as valuable tools for the leather sector. En ligne : https://drive.google.com/file/d/1mc0QZa90bztRCPWCNbDYXdTmMmWWFSx6/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9084 [article]

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SB acrylic technology : closing the performance gap / Alexander K. Campbell in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCII, N° 1 (01/1997)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCII, N° 1 (01/1997) . - p. 17-21 Titre : SB acrylic technology : closing the performance gap Type de document : texte imprimé Auteurs : Alexander K. Campbell, Auteur ; Chol-Yoo Choi, Auteur Année de publication : 1997 Article en page(s) : p. 17-21 Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Acrylic finishes - Acrylic polymers have found extensive use in leather finishing.The basic properties that these polymers offer are softness, heat and light stability, and favorable economics. The SB line of polymers use new technology to obtain a soft hand with improved embossing plate release and print retention, higher flexibility, and now, better rub resistance. With improved performance, these polymers represent a new generation of acrylics that are alternatives to polyurethane and butadiene systems typically used in performance oriented applications. En ligne : https://drive.google.com/file/d/1lCYvJkDbw-GdyaT1lhaS6POzPUVLBhpT/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9085 [article]

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