. "RIV/60461373:22340/13:43895787!RIV14-MSM-22340___" . . "Microdevices for generation of two-phase and three-phase slug flows coupled with an enzyme reaction"@en . "22340" . . . "3"^^ . . "88160" . "\u010Cech, Ji\u0159\u00ED" . "RIV/60461373:22340/13:43895787" . "3"^^ . "978-80-89475-09-4" . "Microdevices for generation of two-phase and three-phase slug flows coupled with an enzyme reaction" . . "\u0160nita, Dalimil" . "We developed slug-flow microfluidic systems for the enzyme hydrolysis of soybean oil. Because the enzyme, lipase, catalyzes various reactions at the water-oil interface, the use of well-defined slug flow microsystems can bring a promising alternative to classical systems. Two developed systems exploit biphasic oil-water slug flow formed in glass and teflon microcapillaries. The remaining system is able to generate stable three-phase slug flow nitrogen-(oil-water). Generation and characterization of the unique three-phase slug flow system are described in detail. It was found that the most stable oil-water slug flow can be realized by means of hydrophilic glass capillaries with the oil conversion about 30 % within 20 min. The highest triglyceride conversion (more than 40 % within 20 min) was attained in hydrophobic capillaries with instable two-phase slug flow. We identified the viscous stress to be the source of slug flow instabilities in the hydrophobic capillaries. The three-phase flow system produced regular segments of nitrogen separating small and regular oil-water emulsion compartments. In this system we obtained conversion about 35% within 20 min. We also mesured pressure drop in every type of microreactor."@en . . . "P\u0159ibyl, Michal" . "frequency dependence; signal transmission; oscillatory flow; mathematical model"@en . "Bratislava" . "We developed slug-flow microfluidic systems for the enzyme hydrolysis of soybean oil. Because the enzyme, lipase, catalyzes various reactions at the water-oil interface, the use of well-defined slug flow microsystems can bring a promising alternative to classical systems. Two developed systems exploit biphasic oil-water slug flow formed in glass and teflon microcapillaries. The remaining system is able to generate stable three-phase slug flow nitrogen-(oil-water). Generation and characterization of the unique three-phase slug flow system are described in detail. It was found that the most stable oil-water slug flow can be realized by means of hydrophilic glass capillaries with the oil conversion about 30 % within 20 min. The highest triglyceride conversion (more than 40 % within 20 min) was attained in hydrophobic capillaries with instable two-phase slug flow. We identified the viscous stress to be the source of slug flow instabilities in the hydrophobic capillaries. The three-phase flow system produced regular segments of nitrogen separating small and regular oil-water emulsion compartments. In this system we obtained conversion about 35% within 20 min. We also mesured pressure drop in every type of microreactor." . . . "Tatransk\u00E9 Matliare" . "S" . "2013-05-27+02:00"^^ . "[78CBB0736224]" . . . . . "Proceedings of the 40th International Conference of Slovak Society of Chemical Engineering" . . "8"^^ . . "Microdevices for generation of two-phase and three-phase slug flows coupled with an enzyme reaction" . . . "Microdevices for generation of two-phase and three-phase slug flows coupled with an enzyme reaction"@en . "Slovak Society of Chemical Engineering" . .