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Mention de date : 11/1998
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Ajouter le résultat dans votre panierEconomic analysis of the feasibility of using enzymes in the unhairing process / Chris E. Schraeder in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCIII, N° 9 (11/1998)
Titre : Economic analysis of the feasibility of using enzymes in the unhairing process Type de document : texte imprimé Auteurs : Chris E. Schraeder, Auteur ; Jinger L. Eberspacher, Auteur ; R. T. Ervin, Auteur Année de publication : 1998 Article en page(s) : p. 265-271 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : One of the most environmentally harmful chemicals in tanning effluent is lime sulfide. This chemical is used in the unhairing process to loosen the hair and chemically dissolve it. Enzymes have been shown to be an alternative to using lime sulfide in the unhairing process. A cost comparison of chemical and enzyme unhairing processes was conducted. It was found that chemical unhairing is currently more cost effective than the enzyme process. However, as the environmental damage caused by chemical unhairing becomes better understood, it is assumed that more stringent regulations will be placed on tanneries, increasing their costs. From this study it is reported that enzymatic unhairing should eventually be adopted as society better realizes the damage caused to the environment from using chemical unhairing. Note de contenu : - Leather industry
- Unhairing
- Process costs
- Environmental consideration: why is pollution proceduced
- Right to pollute
- Right to a clean environment
- Increased cost resulting from environmental damage
-En ligne : https://drive.google.com/file/d/1gngez0huNXxKrxgKjZEU9NVVWuP9vXqk/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4495
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCIII, N° 9 (11/1998) . - p. 265-271[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 006969 - Périodique Bibliothèque principale Documentaires Disponible
Titre : Properties of bovine hair keratins solubilized with thioglycolate Type de document : texte imprimé Auteurs : A. M. S. Kamal, Auteur ; K. Shirai, Auteur ; Y. Ishii, Auteur ; Y. Nomura, Auteur Année de publication : 1998 Article en page(s) : p. 272-282 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Partially decomposed hair, created during conventional hide processing in the beamhouse, is one of the strongest pollutants in the tannery effluent. One of the approaches that has been taken to reducing the pollution from the unhairing process is to remove intact hair from the hides by using conventional reagents in novel ways that loosen rather than digest the hair. This paper considers the reductive solubilization of recoverde hair from raw hide with the final goal being to utilize it as a bio-material. In the present study, three kinds of solubilizing solutions were tested : 0.1 M thioglycolate at pH 11 35°C (TG-11) , 0.1 M thioglycolate containing 6M guanidine at pH 7 35°C (TG/G-7) and 0.1M thioglyconate containing 6M urea at pH 7 , 35°C (TG/U-7. About 60% of the original hair weight was recovered as the product became solubilized with TG-11. The recovered protein had good solubility in solvent buffer without reducing agent. Approximately the same extent of solubilization was attained with TG/G-7 at neutral pH. The reultant preparation was almost insoluble unless the solvent contained the reducing agent. One the other hand, the extent of solubilization with TG/U-7 was significantly low. Note de contenu : - EXPERIMENTAL: Bovine hair - Dissolution of hair and recovery of product - Solubility test - Amino acid analysis - SDS-polyacrylamide gel electrophoresis - Size exclusion chromatography (SEC) - FTIR analysis
- RESULTS AND DISCUSSION: Amino acid composition of different kinds of bovine hairs and merimo wool - Yield of the dissoved product from hair in thioglycolate solution - Solubility of dissolved product in non-reductive solvent buffer - Amino acid composition of dissoved products - SDS-PAGE of dissolved products - SEC pattern of the dissolved product - FTIR analysis of dissolved productEn ligne : https://drive.google.com/file/d/1nvwS5396h6KE_5GJNjywJ2j6rl6nGmFG/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4496
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCIII, N° 9 (11/1998) . - p. 272-282[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 006969 - Périodique Bibliothèque principale Documentaires Disponible
Titre : The characteristics and mode of action of modern polymers in post-tanning treatment processes Type de document : texte imprimé Auteurs : J. P. Dix, Auteur Année de publication : 1998 Article en page(s) : p. 283-294 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage En ligne : https://drive.google.com/file/d/1FgGmP4DZrxgcklgPkB5XUBjPFCaK2SoS/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4497
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCIII, N° 9 (11/1998) . - p. 283-294[article]Réservation
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Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 006969 - Périodique Bibliothèque principale Documentaires Disponible
Exemplaires (1)
| Code-barres | Cote | Support | Localisation | Section | Disponibilité |
|---|---|---|---|---|---|
| 006969 | - | Périodique | Bibliothèque principale | Documentaires | Disponible |
