| Titre : |
The use of lipases in the beamhouse processes |
| Type de document : |
texte imprimé |
| Auteurs : |
Jürgen Christner, Auteur |
| Année de publication : |
1992 |
| Article en page(s) : |
p. 128-139 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
The use of lipases to degrase hides and pelts has been discussed in the literature for many years. However, there were several problems associated with their use which hindered the broad introduction of lipases in practice. First of all these products were relatively high in cost and not available in the quantities needed. The available lipases, extracted from pancreas glands or various strains of fungi, had an optimal pH activity range of pH 5 to 8. Their degreasing effect in soak and particularly in the lime was not sufficient to justify the cost of the lipase New lipase derived from bacterial sources are now available which are active in a pH range from pH 8 to 12. This enables us to use them effectively in soaking and liming. A highly synergistic effect in degreasing is achieved when special proteases and emulsifying systems are used at the same time. Proteases break down the cell membranes of fat cells in the hide and the new lipase reduces the amount of emulsifier needed. In addition to improved degreasing a better soaking and liming effect is obtained. The grain of limed hides is very clean and hides are much less drawn. |
| En ligne : |
https://drive.google.com/file/d/1_sFbowphqQVmpYITQtXMDUbbPz7inn0O/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8313 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > LXXXVII, N° 4 (04/1992) . - p. 128-139
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