Chemical modification of collagen for improved chrome tannage / Stephen H. Feairheller in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXIII (Année 1988)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXXIII (Année 1988) . - p. 363-371 Titre : Chemical modification of collagen for improved chrome tannage Type de document : texte imprimé Auteurs : Stephen H. Feairheller, Auteur ; Maryann M. Taylor, Auteur ; Edward H. Harris, Auteur Année de publication : 1988 Article en page(s) : p. 363-371 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Chrome salts are known to tan by bonding with collagen's side chain carboxyl groups as the primary sites for the crosslinking. As part of a basic study to develop chrome-sparing tannage, additional carboxyl groups have been added to collagen by use of the Michael Reaction.Under these conditions, beta-carboxyethyl acrylate was covalently bonded to existing free amino side chains of collagen. This resulted in a significant improvement in chrome tanning. With equal chrome offerings, the treated hide samples showed lysine and hydroxylysine losses indicating that these amino acid residues are the sites of the reaction with collagen. Physical properties of the leather were determined. En ligne : https://drive.google.com/file/d/1w7pAyA4kthnWevu7pWQhbCMjW0KYccsV/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8951 [article]

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Crosslinking of collagen with acrylamide derivatives 1 : N-hydroxymethylacrylamide and N,N'-(1,2-dihydroxyethylene)-bisacrylamide / Li Ying in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXV (Année 1990)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXXV (Année 1990) . - p. 78-86 Titre : Crosslinking of collagen with acrylamide derivatives 1 : N-hydroxymethylacrylamide and N,N'-(1,2-dihydroxyethylene)-bisacrylamide Type de document : texte imprimé Auteurs : Li Ying, Auteur ; Stephen H. Feairheller, Auteur ; F. Scholnick, Auteur Année de publication : 1990 Article en page(s) : p. 78-86 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Two derivatives of acrylamide, namely : N-hydroxymethylacrylamide and N,N'-(1,2-dihydroxyethylene)-bisacrylamide, were found to react rapidly and, at least in part, irreversibly with hide and skin collagen. As measured by shrinkage temperature, the two compounds effectively crosslinked the collagen and, with proper control, could serve as tanning agents. The reaction takes place under alkaline conditions but swelling of the protein was controlled by the addition of sodium sulfate to the reaction mixtures. Shrinkage temperatures of 85°C and higher were obtained. The products exhibited the required resistance to chemical and enzymic attack and, on a scale, were made into white or pale yellow leather, respectively. The results were compared to those obtained with formaldehyde and glyoxal. En ligne : https://drive.google.com/file/d/1WwDfDH253Q-n6L1gsMcfgXoEH7bycEdm/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8613 [article]

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Crosslinking of collagen with acrylamide derivatives. 3 : Improved chrome tannage by collagen modification / F. Scholnick in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXVI, N° 6 (06/1991)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXXVI, N° 6 (06/1991) . - p. 193-198 Titre : Crosslinking of collagen with acrylamide derivatives. 3 : Improved chrome tannage by collagen modification Type de document : texte imprimé Auteurs : F. Scholnick, Auteur ; Edward J. Diefendorf, Auteur ; Stephen H. Feairheller, Auteur ; Paul L. Kronick, Auteur Année de publication : 1991 Article en page(s) : p. 193-198 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The Michael Reaction has been used with an acrylic-acid derivative to provide additional carboxyl binding sites on collagen during processing of hides into leather. The crosslinked product had a higher shrinkage temperature and a considerably lower lysine and hydroxylysine content than conventionally processed hides. Subsequent tanning led to a higher chrome uptake than that found in the untreated control. The results indicated that both direct crosslinking and improved chrome tanning are possible with this derivative but that these are accompanied by some loss of tensile strength En ligne : https://drive.google.com/file/d/1B2RiLHhKURvVOJE4M_0wUHDk_BoPn5zo/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8493 [article]

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Crosslinking of collagen with acrylamide derivatives II : N,N'-methylenebisacrylamide and higher homologs / Stephen H. Feairheller in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXVI, N° 5 (05/1991)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXXVI, N° 5 (05/1991) . - p. 171-178 Titre : Crosslinking of collagen with acrylamide derivatives II : N,N'-methylenebisacrylamide and higher homologs Type de document : texte imprimé Auteurs : Stephen H. Feairheller, Auteur ; F. Scholnick, Auteur Année de publication : 1991 Article en page(s) : p. 171-178 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Two symmetrical derivatives of acrylamide, namely: N,N'-methylenebisacrylamide and N,N'-dimethylenebisacrylamide, were found to crosslink hide collagen and, with proper control of the reaction conditions, served as tanning agents. The reactions take place under alkaline conditions and swelling is controlled by addition of sodium sulfate. Shrinkage temperatures over 80°C were obtained and the products exhibited good resistance to chemical and enzymic attack. The products were made into white leather on a small scale. Two higher homologs, N,N'-trimethylenebisacrylamide and N,N'-hexamethylenebisacrylamide, could not be made to react under the same conditions nor under modified conditions designed to improve their solubility. En ligne : https://drive.google.com/file/d/1gtIIqzMBDB6-U0jHmrLpC4zlMPxkw65u/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8496 [article]

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Crosslinking of collagen with dicarboxylic acids / F. Scholnick in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXVII, N° 9 (09/1992)

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXXVII, N° 9 (09/1992) . - p. 333-338 Titre : Crosslinking of collagen with dicarboxylic acids Type de document : texte imprimé Auteurs : F. Scholnick, Auteur ; L. L. Liao, Auteur ; Eleanor M. Brown, Auteur ; Stephen H. Feairheller, Auteur Année de publication : 1992 Article en page(s) : p. 333-338 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : We have studied the crosslinking of collagen in sheepskin by treatment with N-hydroxysulfosuccinimide esters of dicarboxylic acids.The acylating agents are prepared from dicarboxylic acids including suberic (C-8), azelaic(C-9) and sebacic(C-10) acids.These agents are extremely soluble in water and react readily with sheepskin,resulting in increases in shrinkage temperatures before chrome tanning.A descrisption of the synthesis of acylating agents and a discussion of the physical properties of the resulting leathers are presented. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8284 [article]

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Enzymatic treatment of offal from fleshing machines / M. M. Taylor in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXIV (Année 1989)  

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Graft polymerization. III. Some properties of the leather obtained from the graft polymerization of vinyl monomers onto chrome-tanned nigerian hairsheep / Edward H. Harris in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXIX (Année 1974)  

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Graft polymerization. IV. Further studies of the initiation step in the graft polymerization of vinyl monomers onto chrome-tanned collagen / Maryann M. Taylor in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXII (Année 1977)  

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Graft polymerization VI. Studies on proof of grafting and molecular weights of the isolated poly(methyl methacrylate) grafts / Helen A. Gruber in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXIII (Année 1978)  

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Graft polymerization VIII. Effect of changes in the initiating system on the molecular weight of the graft copolymer in polyretanned leather / Helen A. Gruber in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXIII (Année 1978)  

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A matched-side comparative study of the unsplit blue stock and crust leather made from uncured and pit-cured hides / Stephen H. Feairheller in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXX (Année 1975)  

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A method of processing fresh butcher-hogskins / William J. Hopkins in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXX (Année 1985)

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Polymer-leather composites. VI. Mechanism of deposition of selected acrylate monomers by polymerization into 5-ounce chrome-tanned cattlehide / E. F. Jordan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XXVII (Année 1982)  

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Polymer-leather composites VII. Morphological and mechanical properties of selected acrylate-leather composite materials / Edmund F. Jordan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XXVII (Année 1982)  

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Predicted interactions of ionizable side chains in a fragment of the three-dimensional energy-minimized model for calf skin type I collagen microfibril / Eleanor M. Brown in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXVIII, N° 1 (01/1993)  

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A review of the uses of enzymes in the tannery / Maryann M. Taylor in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXII (Année 1987)  

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The 1985 John Arthur Wilson memorial lecture the next major change in leather manufacturing technology - what is it likely to be and how close are we to it? / Stephen H. Feairheller in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXX (Année 1985)

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Three-dimensional-energy minimized models for calf skin type 1 collagen triple helix and microfibril : 1. The triple helical models / James M. Chen in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXVI, N° 12 (12/1991)  

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Three-dimensional-energy minimized models for calf skin type 1 collagen triple helix and microfibril : 2. The "smith" microfibril / James M. Chen in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXVI, N° 12 (12/1991)  

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Unhairing method identified as source of n-nitrosodimethylamine in tannery atmosphere / David G. Bailey in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XXVII (Année 1982)  

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