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Upgrading low-grade grain leather using high performance polymeric dispersions by a transfer coating system / V. Pandimadevi in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVI, N° 5 (05/2001)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCVI, N° 5 (05/2001) . - p. 157-161 Titre : Upgrading low-grade grain leather using high performance polymeric dispersions by a transfer coating system Type de document : texte imprimé Auteurs : V. Pandimadevi, Auteur ; A. Kujambal, Auteur Année de publication : 2001 Article en page(s) : p. 157-161 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : This paper deals with upgrading of low-grade grain leathers by an innovative finishing technology known as WATER-BORNE TRANSFER COATING SYSTEM. The finishing chemicals used in this work are ecologically acceptable because of their very low solvent content. Aliphatic polyurethane dispersions were used in this finishing method to provide excellent physical properties to the finished leathers for making high value leather products. This paper describes crusting of low-grade wet blue cow sides using a proper retanning and fatliquoring system to make the crust with slight stretch and without any unbound or oxidisable fat (which will inhibit the adhesion of the finish film). The crust was finished by transfer coating using release paper, wherein the finished film was cast on release paper and subsequently it was transferred on to the crust leather. The film was developed in three stages using polyurethane dispersions, defoaming agent, leveling agent, thickening agent, crosslinker and adhesive. The physical and chemical properties of the upgraded leathers were evaluated and the results obtained were discussed. En ligne : https://drive.google.com/file/d/15jIQTilPk477HalZRbiK6FwfKFK_2vEW/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4375 [article]

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Fact and fantasy regarding resistance to microbicides / Vanja M. King in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVI, N° 5 (05/2001)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCVI, N° 5 (05/2001) . - p. 162-168 Titre : Fact and fantasy regarding resistance to microbicides Type de document : texte imprimé Auteurs : Vanja M. King, Auteur ; Mainul N. Haque, Auteur ; Stephen D. Bryant, Auteur Année de publication : 2001 Article en page(s) : p. 162-168 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Resistance to animal and human therapeutic antibiotics is well known and understood among both the scientific and lay community. Performance failures with industrial microbicides are commonly discussed as if the same phenomenon occurs here also. Much of this is indeed fantasy, as the mode of action of most, but not all, industrial microbicides are based on a fundamentally different principle than are therapeutic antibiotics. Industrial microbicides are designed to be broad spectrum and achieve this by attacking some fundamental principle that is present in most microorganisms and without which the organism cannot survive. Antibiotics, on the other hand, are designed to be as narrow spectrum as possible, so that side effects in the animal or human host are minimized. A clear understanding of why a broad spectrum microbicide fails in a particular situation is necessary in order to have a successful program. Application errors, such as using an inappropriate biocide and calling it resistance, will ultimately be economically detrimental. Using different modes of action products in sequence is understood in antibiotic science to encourage true resistance. This may very well also promote resistance in broad spectrum microbicides. A thorough understanding of microbicides and the particular industrial situation in which they are used is necessary to have a successful, cost-effective program, while minimizing promotion of resistance. En ligne : https://drive.google.com/file/d/1CNZqcPg-OWuMyfOezwwUd5De1p3IsSeA/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4382 [article]

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Formation of Cr(VI) traces in chrome-tanned leather : causes, prevention & latest findings / Diether Graf in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVI, N° 5 (05/2001)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCVI, N° 5 (05/2001) . - p. 169-179 Titre : Formation of Cr(VI) traces in chrome-tanned leather : causes, prevention & latest findings Type de document : texte imprimé Auteurs : Diether Graf, Auteur Année de publication : 2001 Article en page(s) : p. 169-179 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage En ligne : https://drive.google.com/file/d/1FP0TdPNg2yFEgQJdWYHc2aR86lUKDvi_/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4383 [article]

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The use of neutral protease in enzymatic unhairing / R. G. Paul in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVI, N° 5 (05/2001)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCVI, N° 5 (05/2001) . - p. 180-185 Titre : The use of neutral protease in enzymatic unhairing Type de document : texte imprimé Auteurs : R. G. Paul, Auteur ; I. Mohamed, Auteur ; D. Davighi, Auteur ; Anthony D. Covington, Auteur Année de publication : 2001 Article en page(s) : p. 180-185 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cuirs et peaux Epilage Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : It has long been recognised that enzymatic removal of hair would provide a suitable alternative to destructive sulfide unhairing and a number of workers have investigated the use of proteolytic enzymes to this end. These studies include the use of a diverse array of enzymes from a range of enzyme classes many of which are rather non-specific. A more subtle approach would involve specific cleavage of basement membrane components e.g. type IV collagen, leaving types I and III collagens intact. Consequently, a series of pilot studies on hair removal from bovine hides was carried out using a neutral protease enzyme, dispase, which possesses such substrate specificity. The enzyme caused loosening of the hair and associated hair loss, without damaging the fibrous collagen of the dermis. En ligne : https://drive.google.com/file/d/1sxoGn1I5zkQuS1DW-ZTKwTs3U9TS78TP/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4384 [article]

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