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Effect of ethanol organosolv pretreatment on enzymatic hydrolysis of buddleja davidii stem biomass / Hallac, Bassem B. in Industrial & engineering chemistry research, Vol. 49 N° 4 (Fevrier 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 4 (Fevrier 2010) . - pp 1467–1472 Titre : Effect of ethanol organosolv pretreatment on enzymatic hydrolysis of buddleja davidii stem biomass Type de document : texte imprimé Auteurs : Hallac, Bassem B., Auteur ; Sannigrahi, Poulomi, Auteur ; Pu, Yunqiao, Auteur Année de publication : 2010 Article en page(s) : pp 1467–1472 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Ethanol  organosolv  pretreatment  Enzymatic  Biomass. Résumé : Ethanol organosolv pretreatment was performed on Buddleja davidii to evaluate this bioresource as a potential feedstock for bioethanol production. B. davidii was pretreated and delignified, while 85% of the glucose content of the untreated material was retained in the pretreated solid fraction. The enzymatic hydrolysis showed that organosolv pretreatment produced solid substrates that were readily digestible by cellulases. Gel-permeation chromatography was used to determine the degree of polymerization (DP) of cellulose, and solid-state cross polarization/magic angle spinning 13C NMR experiments were conducted to study the changes in crystallinity and ultrastructure of cellulose. The results showed a decrease in DP along with an increase in the relative proportions of para-crystalline and amorphous cellulose and a decrease in cellulose Iα and Iβ. Removal of lignin and hemicellulose, reduction in DP, and decrease in the crystalline allomorphs (Iα and Iβ) increased the amenability of the biomass to enzymatic degradation. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900683q [article] Effect of ethanol organosolv pretreatment on enzymatic hydrolysis of buddleja davidii stem biomass [texte imprimé] / Hallac, Bassem B., Auteur ; Sannigrahi, Poulomi, Auteur ; Pu, Yunqiao, Auteur . - 2010 . - pp 1467–1472. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 4 (Fevrier 2010) . - pp 1467–1472 Mots-clés : Ethanol  organosolv  pretreatment  Enzymatic  Biomass. Résumé : Ethanol organosolv pretreatment was performed on Buddleja davidii to evaluate this bioresource as a potential feedstock for bioethanol production. B. davidii was pretreated and delignified, while 85% of the glucose content of the untreated material was retained in the pretreated solid fraction. The enzymatic hydrolysis showed that organosolv pretreatment produced solid substrates that were readily digestible by cellulases. Gel-permeation chromatography was used to determine the degree of polymerization (DP) of cellulose, and solid-state cross polarization/magic angle spinning 13C NMR experiments were conducted to study the changes in crystallinity and ultrastructure of cellulose. The results showed a decrease in DP along with an increase in the relative proportions of para-crystalline and amorphous cellulose and a decrease in cellulose Iα and Iβ. Removal of lignin and hemicellulose, reduction in DP, and decrease in the crystalline allomorphs (Iα and Iβ) increased the amenability of the biomass to enzymatic degradation. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900683q