| Titre : |
Chemical modification of protein products isolated from chromium-containing solid tannery waste and resultant influence on physical and functional properties |
| Type de document : |
texte imprimé |
| Auteurs : |
Maryann M. Taylor, Auteur ; William N. Marmer, Auteur ; Eleanor M. Brown, Auteur ; Luisa F. Cabeza, Auteur |
| Année de publication : |
1999 |
| Article en page(s) : |
p. 171-181 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
Samples of gelatin extracted from chromium-containing leather waste by different protocols were chemically modified with glutaraldehyde, glyoxal and carbodiimide and compared to similarly modified commercial gelatins. Glutaraldehyde appeared to be a very efficient cross-linker, giving gels that would not melt at 70 oC with the addition of only 2% glutaraldehyde but with a decrease in their rigidity when the amount of glutaraldehyde was increased. Foaming tests on these samples demonstrated that the addition of low amounts of glutaraldehyde increased both the foam capacity and the foam stability of the gelatins. Glyoxal modification did not have such an effect on the gel strength and melting point of the samples. It did not increase foam capacity but did increase foam stability, it gave better adhesive properties to these gelatins and it did increase dramatically their emulsification capacity. Carbodiimide had similar effects on gel strength as glyoxal; it did increase dramatically the melting point of commercial gelatin but had no effect on the melting point of the extracted gelatins. It decreased the foam and adhesive properties of all the samples, but it did increase the emulsification capacity of the extracted gelatins. The study demonstrates that the functional properties of chemically modified gelatin extracted from chromium-containing leather waste were changed, and, as a result, new uses could be identified for these value-added products. |
| Note de contenu : |
- EXPERIMENTAL : Material - Chemical modification
- METHODS : Analyses - Gel strenght - Melting point - Foamability - Adhesive test - Emulsion capacity
|
| En ligne : |
https://drive.google.com/file/d/1lbZ5PcQBffG9si0Z7QXouceREnsJPz67/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4452 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LCIV, N° 5 (07/1999) . - p. 171-181
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Chemical modification of protein products isolated from chromium-containing solid tannery waste and resultant influence on physical and functional properties in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LCIV, N° 5 (07/1999)
