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J A Odriozola - One of the best experts on this subject based on the ideXlab platform.
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glycerol steam reforming on bimetallic nisn ceo2 mgo al2o3 catalysts influence of the Support Reaction parameters and deactivation regeneration processes
Applied Catalysis A-general, 2015Co-Authors: L F Bobadilla, Anna Penkova, A Alvarez, M I Dominguez, F Romerosarria, M A Centeno, J A OdriozolaAbstract:Abstract NiSn bimetallic catalysts Supported over Al 2 O 3 modified with different promoter (Mg and/or Ce) were prepared and characterized by powder X-ray diffraction (XRD), N 2 sorptometry, and temperature programmed reduction (TPR). Hydrogen production by glycerol steam reforming over these catalysts was investigated. Among the catalysts, NiSn/AlMgCe catalyst shows the highest hydrogen yield as well as the best stability during the Reaction. The effect of Reaction temperature, water/glycerol molar ratio and space velocity on the glycerol steam reforming over NiSn/AlMgCe were also investigated. Finally, it was verified that the catalyst can be regenerated by oxidation of carbonaceous deposits.
L F Bobadilla - One of the best experts on this subject based on the ideXlab platform.
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glycerol steam reforming on bimetallic nisn ceo2 mgo al2o3 catalysts influence of the Support Reaction parameters and deactivation regeneration processes
Applied Catalysis A-general, 2015Co-Authors: L F Bobadilla, Anna Penkova, A Alvarez, M I Dominguez, F Romerosarria, M A Centeno, J A OdriozolaAbstract:Abstract NiSn bimetallic catalysts Supported over Al 2 O 3 modified with different promoter (Mg and/or Ce) were prepared and characterized by powder X-ray diffraction (XRD), N 2 sorptometry, and temperature programmed reduction (TPR). Hydrogen production by glycerol steam reforming over these catalysts was investigated. Among the catalysts, NiSn/AlMgCe catalyst shows the highest hydrogen yield as well as the best stability during the Reaction. The effect of Reaction temperature, water/glycerol molar ratio and space velocity on the glycerol steam reforming over NiSn/AlMgCe were also investigated. Finally, it was verified that the catalyst can be regenerated by oxidation of carbonaceous deposits.
Tomasz Sokół - One of the best experts on this subject based on the ideXlab platform.
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Exact truss topology optimization: allowance for Support costs and different permissible stresses in tension and compression—extensions of a classical solution by Michell
Structural and Multidisciplinary Optimization, 2012Co-Authors: George I. N. Rozvany, Tomasz SokółAbstract:The aim of this paper is twofold. It introduces a theory of Michell trusses taking Support (Reaction) costs into consideration, which is illustrated with a modified version of Michell’s best known example. Then eight other variations on this example are presented, with (i) equal or unequal permissible stresses in tension and compression, (ii) the structural domain consisting of a half-plane or a full plane, and (iii) the Supports being two pins, or a pin and a roller. Previously noted shortcomings of Michell’s theory are highlighted and several fundamental properties of non-selfadjoint topology optimization problems discussed. The analytical solutions are verified to a high degree of accuracy by numerical results.
Reynaldo Villalonga - One of the best experts on this subject based on the ideXlab platform.
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inactivation of immobilized trypsin under dissimilar conditions produces trypsin molecules with different structures
RSC Advances, 2016Co-Authors: Alfredo Sanchez, Jenifer Cruz, Nazzoly Rueda, Jose Dos C S Santos, Rodrigo Torres, Claudia Ortiz, Reynaldo VillalongaAbstract:Bovine trypsin has been immobilized on glyoxyl-agarose and two different preparations have been produced. One was reduced just after immobilization, while the other was left to continue the enzyme-Support Reaction. This strategy is a guarantee of the identical orientation of the enzyme regarding the Support surface and the identical physical properties of the Support. Then, the two preparations were submitted to inactivations under different conditions: thermal and solvent inactivations under different pH values. After drying, the structures of the different enzymes preparations were analyzed by deconvolution of the amide I region, which provides information about the secondary structure of the protein in terms of α-helixes, β-sheets, β-turns and non-ordered or irregular structures. The results confirm that the structures of the different preparations were very different, suggesting that the inactivation ways were different for each enzyme preparation and dependent on the inactivation conditions. This information is very relevant for the design of strategies for enzyme stabilization, as shown by the fact that the inactivation may follow different conformational changes depending on the degree of enzyme rigidification and inactivation conditions.
Jenifer Cruz - One of the best experts on this subject based on the ideXlab platform.
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inactivation of immobilized trypsin under dissimilar conditions produces trypsin molecules with different structures
RSC Advances, 2016Co-Authors: Alfredo Sanchez, Jenifer Cruz, Nazzoly Rueda, Jose Dos C S Santos, Rodrigo Torres, Claudia Ortiz, Reynaldo VillalongaAbstract:Bovine trypsin has been immobilized on glyoxyl-agarose and two different preparations have been produced. One was reduced just after immobilization, while the other was left to continue the enzyme-Support Reaction. This strategy is a guarantee of the identical orientation of the enzyme regarding the Support surface and the identical physical properties of the Support. Then, the two preparations were submitted to inactivations under different conditions: thermal and solvent inactivations under different pH values. After drying, the structures of the different enzymes preparations were analyzed by deconvolution of the amide I region, which provides information about the secondary structure of the protein in terms of α-helixes, β-sheets, β-turns and non-ordered or irregular structures. The results confirm that the structures of the different preparations were very different, suggesting that the inactivation ways were different for each enzyme preparation and dependent on the inactivation conditions. This information is very relevant for the design of strategies for enzyme stabilization, as shown by the fact that the inactivation may follow different conformational changes depending on the degree of enzyme rigidification and inactivation conditions.