Enhancing activity and stability of Burkholderia cepacia lipase by immobilization on surface-functionalized mesoporous silicates.

Burkholderia cepacia lipase was immobilized on various types of phenyl-functionalized mesoporous silicates (MPS). MPS, anchored with a phenyl group on the silica wall and with three dimensional (3D) mesoporosity, showed highest lipase adsorption capacity and best activities both in aqueous and organic reagents.

Catalytic activity of aryl alcohol oxidase immobilized in 3D-mesoporous silicates.

Aryl alcohol oxidase was immobilized on two mesoporous materials, MS-A and MS-B. The immobilization rate for the larger pore material MS-A (11.5 nm) was higher than for the smaller pore material MS-B (4.

Spin-probe ESR study on the entrapment of organic solutes by the nanochannel of MCM-41 in benzene.

An ESR study has been made on the adsorption of three types of aminoxyl radicals with different substituent groups in the nanochannel of MCM-41 in benzene. In the suspensions of MCM-41, all the aminoxyl radicals, usually called as spin probes, show the ESR spectra composed of two signals: the main broader one from the spin probes trapped in the nanochannel, and a sharp minor signal from those in the bulk. The spin probes adsorbed in the nanochannel retain considerable mobility especially at higher temperatures over 300 K.

Reaction properties of catalytic antibodies encapsulated in organo substituted SiO2 sol-gel materials.

Catalytic antibodies (38C2 and 84G3) were encapsulated in hybrid organic-inorganic sol-gel powder prepared from tetraethoxysilane (TEOS) and organoalkoxysilanes, then used to catalyze enantioselective aldol reactions. Sol-gel immobilization enhanced antibody stability with respect to the effect of temperature and organic solvent concentration.