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Green and efficient conversion of CO2 to methanol by biomimetic coimmobilization of three dehydrogenases in protamine-templated titania / Qianyun Sun in Industrial & engineering chemistry research, Vol. 48 N° 9 (Mai 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 9 (Mai 2009) . - pp. 4210–4215 Titre : Green and efficient conversion of CO2 to methanol by biomimetic coimmobilization of three dehydrogenases in protamine-templated titania Type de document : texte imprimé Auteurs : Qianyun Sun, Auteur ; Yanjun Jiang, Auteur ; Zhongyi Jiang, Auteur Année de publication : 2009 Article en page(s) : pp. 4210–4215 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Carbon  dioxide  Mutienzyme  system  Titania  particles  Biomimetic  mineralization  process Résumé : A green and efficient mutienzyme system was established, which efficiently converted carbon dioxide into methanol, by encapsulating three dehydrogenases within titania particles through a facile and mild biomimetic mineralization process. The enzyme-containing titania particles were characterized by scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, and X-ray photoelectron spectroscopy (XPS). The results indicated that the enzyme-containing titania particles were amorphous and consisted of interconnected nanospheres with sizes in the range of 400−600 nm. The three encapsulated dehydrogenases (formate dehydrogenase, formaldehyde dehydrogenase, alcohol dehydrogenase) sequentially converted carbon dioxide into HCOOH, CHOH, and CH3OH using NADH as a terminal electron donor for each dehydrogenase-catalyzed reduction. Compared to the open-style system which directly performed the bioconversion using free enzymes in aqueous solution, higher reaction yield in a wider pH and temperature range was obtained by the closed-style coimmobilization multienzyme system. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801931j [article] Green and efficient conversion of CO2 to methanol by biomimetic coimmobilization of three dehydrogenases in protamine-templated titania [texte imprimé] / Qianyun Sun, Auteur ; Yanjun Jiang, Auteur ; Zhongyi Jiang, Auteur . - 2009 . - pp. 4210–4215. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 9 (Mai 2009) . - pp. 4210–4215 Mots-clés : Carbon  dioxide  Mutienzyme  system  Titania  particles  Biomimetic  mineralization  process Résumé : A green and efficient mutienzyme system was established, which efficiently converted carbon dioxide into methanol, by encapsulating three dehydrogenases within titania particles through a facile and mild biomimetic mineralization process. The enzyme-containing titania particles were characterized by scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, and X-ray photoelectron spectroscopy (XPS). The results indicated that the enzyme-containing titania particles were amorphous and consisted of interconnected nanospheres with sizes in the range of 400−600 nm. The three encapsulated dehydrogenases (formate dehydrogenase, formaldehyde dehydrogenase, alcohol dehydrogenase) sequentially converted carbon dioxide into HCOOH, CHOH, and CH3OH using NADH as a terminal electron donor for each dehydrogenase-catalyzed reduction. Compared to the open-style system which directly performed the bioconversion using free enzymes in aqueous solution, higher reaction yield in a wider pH and temperature range was obtained by the closed-style coimmobilization multienzyme system. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801931j

Sol – gel derived boehmite as an efficient and robust carrier for enzyme encapsulatioe / Yuanyuan Zhu in Industrial & engineering chemistry research, Vol. 51 N° 1 (Janvier 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 1 (Janvier 2012) . - pp. 255-261 Titre : Sol – gel derived boehmite as an efficient and robust carrier for enzyme encapsulatioe Type de document : texte imprimé Auteurs : Yuanyuan Zhu, Auteur ; Zhongyi Jiang, Auteur ; Zhang, Lei, Auteur Année de publication : 2012 Article en page(s) : pp. 255-261 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Encapsulation Résumé : Boehmite particles were prepared by a facile sol-gel method using sodium aluminate as the precursor under ambient Conditions, and they were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), powder X-ray diffraction (XRD), nitrogen adsorption, etc. It is found that the boehmite particles consist of flat nanostrips, which are about 230 nm in length and 30 nm in width. The nanostrips are composed of nanoneedles of about 7 nm in diameter and 24 nm in length. The Brunauer―Emmett―Teller (BET) specific surface area, pore size, and pore volume of boehmite particles are 165 m2 g―1, 3.8 nm, and 0.11 cm3 g―1, respectively. Moreover, these boehmite particles are used as an efficient and robust carrier to encapsulate a model enzyme: bovine liver catalase. The catalase encapsulated in boehmite particles exhibits higher pH, thermal, and storage stabilities compared to its free counterpart. These results indicate that boehmite may become a competitive carrier for biological and technological applications. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25476469 [article] Sol – gel derived boehmite as an efficient and robust carrier for enzyme encapsulatioe [texte imprimé] / Yuanyuan Zhu, Auteur ; Zhongyi Jiang, Auteur ; Zhang, Lei, Auteur . - 2012 . - pp. 255-261. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 1 (Janvier 2012) . - pp. 255-261 Mots-clés : Encapsulation Résumé : Boehmite particles were prepared by a facile sol-gel method using sodium aluminate as the precursor under ambient Conditions, and they were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), powder X-ray diffraction (XRD), nitrogen adsorption, etc. It is found that the boehmite particles consist of flat nanostrips, which are about 230 nm in length and 30 nm in width. The nanostrips are composed of nanoneedles of about 7 nm in diameter and 24 nm in length. The Brunauer―Emmett―Teller (BET) specific surface area, pore size, and pore volume of boehmite particles are 165 m2 g―1, 3.8 nm, and 0.11 cm3 g―1, respectively. Moreover, these boehmite particles are used as an efficient and robust carrier to encapsulate a model enzyme: bovine liver catalase. The catalase encapsulated in boehmite particles exhibits higher pH, thermal, and storage stabilities compared to its free counterpart. These results indicate that boehmite may become a competitive carrier for biological and technological applications. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25476469