| Titre : |
Biodegradation of valonia tannin by endomyces shq 14 |
| Type de document : |
texte imprimé |
| Auteurs : |
Weng Huan, Auteur ; Bi Shi, Auteur ; Jinren Ni, Auteur ; A.G.L. Borthwick, Auteur |
| Année de publication : |
2005 |
| Article en page(s) : |
p. 28-33 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Biodégradation
Biodégradation -- Analyse
Champignons microscopiques
Tanins végétaux
Valonia et constituantsValonia est un genre d'algues vertes de la famille des Valoniaceae. La taille d'une seule cellule pluri-nucléée peut atteindre 2 cm chez certaines espèces. (Wikipedia)
|
| Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
| Résumé : |
Certain factors influencing the biodegradation of valonia tannin, ellagitannin, by Endomyces SHQ14 are investigated. The degradation rate of valonia tannin and removal of chemical oxygen demand (COD) are both maximized in a medium containing 25g.l-1 valonia tannin by shaking the culture at 120 rpm and incubating it at 28°C and pH 4.5-5 for 8 days. Additional carbon sources, particularly sucrose, support the degradation of valonia tannin. Peptone is found to be the most suitable nitrogen source. It is verified that the proper ratio of carbon (sucrose) to nitrogen (sodium nitrate) for the degradation of valonia tannin is about 10:1. Four kinds of compounds that may affect the degradation process were selected for this study; namely, an inducer 2,2’-azinobis (3-ethylbenzothiazolin-6-sulfonic acid) (ABTS), an inhibitor, EDTA and two surfactants SDS (sodium dodecylbenzene sulphonate) and Tween-80 (Tw-80). Note: Tween-80 is polyoxyethylene sorbitan monooleate ester with an HLB value of 14 which is used as an emulsifier/surfactant. The biodegradation process is found to be stimulated by 0.3 x 10-3 M inducer ABTS and 0.2 g.l-1 surfactant Tween-80 and SDS, but is inhibited by EDTA. |
| Note de contenu : |
- Medium
- Chemicals
- Extraction
- Microorganism
- Culture conditions
- Proximate analysis of extract
- Analysis of degradation of valonia tannin
- Table 1 : Proximate analysis of extractive
- Table 2 : Effect of inducer ABTS on COD removal and degradation of valonia tannin by Endomyces SHQ 14
- Table 3 : Effect of surfactants and inhibitor on COD removal and degradation of valonia by Endomyces SHQ 14 |
| En ligne : |
https://drive.google.com/file/d/1VCOpFrG90TSs0prfuOAvOv4qphz35CT0/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39611 |
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 89, N° 1 (01-02/2005) . - p. 28-33
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Biodegradation of valonia tannin by endomyces shq 14 in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 89, N° 1 (01-02/2005)
