| Titre : |
Ultrasound extraction of valonea tannin. Part II : Effects on tannin structure and tanning ability |
| Type de document : |
texte imprimé |
| Année de publication : |
2013 |
| Article en page(s) : |
p. 63-71 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Extraction par ultrasons
Tanins
Tanins -- analyse
|
| Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
| Résumé : |
Ultrasound extraction of valonea tannin and its effects on extraction yields in comparison with conventional extraction method was examined in our previous study. Since the extraction conditions are very effective on the characteristics of the tannins, in the present part of the study the tannins obtained by conventional and ultrasonic extraction methods were examined comperatively in terms of their tanning ability, filling properties and molecular structure (by MALDI-TOF). The results demonstrated that while increasing extraction temperatures were increasing filling coefficients of the tannins in conventional extraction, increasing ultrasonic power were decreasing the filling coefficients in ultrasonic extraction. The MALDI-TOF analysis results revealed that whereas in conventional extraction, high extraction temperatures (90°C) caused an onset of some minor fragmentations; in ultrasonic extractions, high ultrasonic powers (100W) caused significant decompositions on valonea tannin. |
| Note de contenu : |
- MATERIALS AND METHODS : Material - Methods (Tanning of skins with extract solutions - Determination of tanning properties of extracted tannins - MALDI-TOF analysis of extracted tannins
- RESULTS AND DISCUSSION : Findings regarding tanning properties of the extracted tannins - MALDI-TOF analysis results |
| En ligne : |
https://drive.google.com/file/d/15E2HjYKUScB_w5JdLj88zUpkusCwkJy6/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17373 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CVIII, N° 2 (02/2013) . - p. 63-71
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Ultrasound extraction of valonea tannin. Part II : Effects on tannin structure and tanning ability in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVIII, N° 2 (02/2013)
