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Laccase catalysed conjugation of catechin with poly(allylamine) / Parikshit Gogoi in Chemical engineering journal, Vol. 155 N° 3 (Decembre 2009) 

Public ISBD [article]  in Chemical engineering journal > Vol. 155 N° 3 (Decembre 2009) . - pp. 810-815 Titre : Laccase catalysed conjugation of catechin with poly(allylamine) : solvent effect Type de document : texte imprimé Auteurs : Parikshit Gogoi, Auteur ; Swapnali Hazarika, Auteur ; Narendra N. Dutta, Auteur Année de publication : 2010 Article en page(s) : pp. 810-815 Note générale : Génie Chimique Langues : Anglais (eng) Mots-clés : Laccase  Catechin  Poly(allylamine)  Solvent  effect Résumé : The Trametes versicolor laccase catalysed the synthesis of poly(allylamine) catechin conjugate by conjugation of catechin with poly(allylamine) was studied in 11 different solvents in order to deduce the solvent effect through an attempt to correlate the initial reaction rate with solvent properties such as hydrophobicity (log P), water solubility (log Sw), electron pair acceptance (View the MathML source) and donation abilities (View the MathML source), polarisibility and dielectric constant. The initial rate was found to exhibit reasonable correlation with log P, log Sw, View the MathML source, polarisibility and dielectric constant. The probable explanation for the deviation has been put forward based on established hypothesis. The study revealed, in general that polar solvents favour the initial reaction rate. The organic solvent interferes neither with the laccase–substrate binding process nor with the catalytic mechanism. The contribution of the substrate–solvent interactions to enzyme kinetics was accounted by replacing the substrate concentration by thermodynamic activities. DEWEY : 660 ISSN : 1385-8947 En ligne : http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TFJ-4WXBMGH-5&_user=6 [...] [article] Laccase catalysed conjugation of catechin with poly(allylamine) : solvent effect [texte imprimé] / Parikshit Gogoi, Auteur ; Swapnali Hazarika, Auteur ; Narendra N. Dutta, Auteur . - 2010 . - pp. 810-815. Génie Chimique Langues : Anglais (eng) in Chemical engineering journal > Vol. 155 N° 3 (Decembre 2009) . - pp. 810-815 Mots-clés : Laccase  Catechin  Poly(allylamine)  Solvent  effect Résumé : The Trametes versicolor laccase catalysed the synthesis of poly(allylamine) catechin conjugate by conjugation of catechin with poly(allylamine) was studied in 11 different solvents in order to deduce the solvent effect through an attempt to correlate the initial reaction rate with solvent properties such as hydrophobicity (log P), water solubility (log Sw), electron pair acceptance (View the MathML source) and donation abilities (View the MathML source), polarisibility and dielectric constant. The initial rate was found to exhibit reasonable correlation with log P, log Sw, View the MathML source, polarisibility and dielectric constant. The probable explanation for the deviation has been put forward based on established hypothesis. The study revealed, in general that polar solvents favour the initial reaction rate. The organic solvent interferes neither with the laccase–substrate binding process nor with the catalytic mechanism. The contribution of the substrate–solvent interactions to enzyme kinetics was accounted by replacing the substrate concentration by thermodynamic activities. DEWEY : 660 ISSN : 1385-8947 En ligne : http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TFJ-4WXBMGH-5&_user=6 [...]