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Production of xylo-oligosaccharides by immobilized-stabilized derivatives of endo-xylanase from Streptomyces halstedii
(2013-03-01)
An endoxylanase from Streptomyces halstedii was stabilized by multipoint covalent immobilization on glyoxyl-agarose supports. The immobilized enzyme derivatives preserved 65% of the catalytic activity corresponding to the ...
Production of xylo-oligosaccharides by immobilized-stabilized derivatives of endo-xylanase from Streptomyces halstedii
(2013-03-01)
An endoxylanase from Streptomyces halstedii was stabilized by multipoint covalent immobilization on glyoxyl-agarose supports. The immobilized enzyme derivatives preserved 65% of the catalytic activity corresponding to the ...
Hybrid materials based on aluminum tungstophosphate or tungstosilicate as catalysts in anisole acylation
(Elsevier Science, 2008-04)
New hybrid materials were prepared by the immobilization of aluminum tungstophosphate or tungstosilicate in a polymeric blend formed by polyvinyl alcohol and polyethylene glycol by the freeze-thawing method. The salts ...
Metallo-stannosilicates as inorganic supports to immobilization of lipase from Thermomyces lanuginosus for biodiesel production
(2021-04-01)
This study reports the application of metallo-stannosilicates as potential inorganic solid matrixes for enzymes immobilization and their use as a heterogenous catalysts in enzymatic transesterification reactions for the ...
Polymer-immobilized aluminium or copper tungstophosphates and tungstosilicates as new catalysts in anisole acylation
(Elsevier Science, 2006)
New materials with spherical shape were obtained from aluminium or copper salts of tungstophosphoric and tungstosilicic acids immobilized in a polymeric blend prepared with polyvinyl alcohol and polyethylene glycol by the ...
The importance of copper placement in chiral catalysts supported on heteropolyanions: Lacunary vs external exchanged
(Elsevier, 2020-03-03)
Lacunary [PCuW11O39]5− species modified with chiral bis(oxazoline) leads to very poor results as catalyst in theenantioselective cyclopropanation, in contrast with the Cu-bis(oxazoline) complex exchanged on the Keggin[PW12O40]3− ...
Synthesis of two new Mo(II) organometallic catalysts immobilized on POSS for application in olefin oxidation reactions
(2017-01-01)
The purpose of this work was the preparation and characterization of two new catalysts POSS-ATZAc-[Mo(η3-C3H5)Br(CO)2] (POSS-Mo-I) and POSS-ATZAc-[Mo(CO)3Br2] (POSS-Mo-II). The new heterogeneous catalysts were characterized ...
Synthesis and comparison of the activities of a catalyst supported on two silicate materials
(2017-04-15)
The focus of this work is inspecting the synthesis and comparison of the activities of a catalyst supported on two silicate materials in the epoxidation of 1-octene. The two new catalyst materials were characterized by ...
Immobilized heterologous Rhizopus Oryzae lipase as an efficient catalyst in the acetylation of cortexolone
(Wiley VCH Verlag, 2012-08)
The enzymatic preparation of a monoacetyl derivative of the corticosteroid cortexolone, through a transesterification reaction, is described. The heterologous Rhizopus oryzae lipase, immobilized on three different supports, ...