Enzyme immobilization using two processing methods onto silica core-shell particles

نویسندگان

چکیده

Two methods of enzyme immobilization onto silica core-shell particles were developed. The first method involved the Candida rugosa lipase inside a previously synthesized mesoporous layer (deposited at 80 °C) surrounding dense core. To prevent leakage from support, an outer was deposited 40 °C around containing immobilized lipase. deposition second performed relatively lower temperature, to thermal inactivation enzyme. internal obtained by assembling primary nanoparticles generated highly basic sodium silicate solution on surface poly (diallyldimethylammonium chloride) (PDDA) functionalized core particles. average shell thickness and pore size ?60 nm 24 nm, respectively. effect process parameters generation aggregation prepared also investigated. took place after 840 s 570 reactions, efficiency monolayer 80%. A decline activity approximately 6 times 10 reaction cycles due monolayered shell. An PDDA-functionalized 17 bilayered further reduced diffusion resistance within PDDA however, it retained for next cycles. insufficient allow invertase immobilization. Thus, It preparation simultaneously with °C. showed decreased activity, but not hampered substrate inhibition, as in case free enzyme, location layer, where mass transfer active site present. Han sido desarrollados dos métodos de inmovilización enzimática sobre las partículas la núcleo-cubierta sílice. El primer método implicaba lipasa dentro una capa sílice mesoporosa previamente sintetizada (depositada °C), cual rodea un núcleo denso Para evitar fugas del soporte, se depositó externa temperatura superficie que contenían inmovilizada. La deposición segunda realizó relativamente más baja para inactivación térmica enzima interna obtuvo ensamblando nanopartículas primaria generadas partir solución silicato sodio altamente básica en funcionalizadas con poli (cloruro dialildimetilamonio) (PDDA). grosor medio cubierta y el tamaño poro fue respectivamente. También investigó efecto los parámetros proceso generación agregación preparadas básica. tuvo lugar después reacción, eficiencia monocapa disminución actividad inmovilizada aproximadamente veces ciclos reacción debido fuga monocapa. Se estratificadas promedio poros bicapa redujo aún resistencia difusión y, sin embargo, retuvo siguientes reacción. obtenida insuficiente permitir invertasa. Así, segundo invertasa desarrollado era mayor sintetizada. Lo mismo preparación simultáneamente mostró disminuida, pero no obstaculizada por inhibición sustrato, como caso libre, ubicación mesoporosa, donde existía transferencia masa sustrato activa.

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ژورنال

عنوان ژورنال: Boletin De La Sociedad Espanola De Ceramica Y Vidrio

سال: 2021

ISSN: ['0366-3175', '2173-0431']

DOI: https://doi.org/10.1016/j.bsecv.2020.03.004