[article]
| Titre : |
Unhairing with proteolytic enzymes derived from Streptomyces griseus |
| Type de document : |
texte imprimé |
| Auteurs : |
Andrew G. Gehring, Auteur ; Chad E. Mazenko, Auteur ; William N. Marmer, Auteur ; Gary L. DiMaio, Auteur |
| Année de publication : |
2002 |
| Article en page(s) : |
p. 406-411 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Résumé : |
A mixture of proteolytic enzymes derived from the bacterium, Streptomyces griseus, was used to unhair bovine hide pieces. The enzymatic unhairing was assisted by a 30-min pretreatment of the pieces with carbonate buffer and the inclusion of a common amphoteric surfactant (N, N-dimethyl-1-dodecanamine oxide) in the enzyme formulation. This unhairing process may serve as a replacement for the hairburn process that relies on hazardous sodium sulfide. The unhairing reaction consisted of drumming pretreated hide pieces with 0.5 mg/mL of the bacterial protease (in 1% N, N-dimethyl-1-dodecanamine oxide) for 4 hours at 37°C in a 200% float. This process causes the majority of hair to either fall out intact or to become extremely loose and hence readily removed through physical/mechanical means. Some fine hairs remain, thus requiring sharpening agents to be used in reliming to achieve total unhairing. Laboratory-scale studies using bovine hide pieces compared this enzymatic treatment to typical hairburn with sodium sulfide. The studies demonstrated that shrinkage temperature, physical properties, dye levelness, dye shading, and grain appearance were comparable if not better for the enzymatic unhairing. |
| En ligne : |
https://drive.google.com/file/d/1TxoucXpfszNDUxQTkZ1Z0qx7a_eFHY80/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4269 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCVII, N° 10 (10/2002) . - p. 406-411
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Unhairing with proteolytic enzymes derived from Streptomyces griseus in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVII, N° 10 (10/2002)
