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Showing 1 to 15 of 15 for “"biphasic system"”.
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Prozessentwicklung für die kontinuierliche dynamisch kinetische Racematspaltung
… for different enzymes the development of a biphasic system with water as the reactive phase and CO2 as the non reactive phase has been expedited. For that purpose the ability to measure the pH of the water phase under high pressure and to vary the pH in a controlled manner has been …
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Hydrierung im invertierten Zweiphasensystem scCO 2/H 2 O
Catalysis using an inverted scCO2/H2O biphasic system where the catalyst is immobilized in scCO2 as stationary phase and the substrate and product are contained in the aqueous phase, offers an interesting alternative to classical biphasic systems and enables the conversion of polar substrates, …
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Nanoemulsion-like Polymersomes for Nanoreactors
… catalyst recovery The issues in the nanoreactor system and the mechanism of the phase transfer in the biphasic system are discussed. First, a new reversible reaction process with the thermo-responsive shuttling of the IL-filled polymersomes between the phases was designed. In nanoreactor …
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An Examination of γ-valerolactone Ring Opening and Decarboxylation in Multiphase System and Over Various Solid Acid Catalysts
… liquid and gas phases over various catalytic systems aiming at improving the efficiency in selective preparation of target product. An initial attempt was made in a biphasic reactor to improve the yield to PEA catalyzed by mineral acids (H2SO4). A wide range of solvents was tested for their …
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An Examination Of Γ-valerolactone Ring Opening And Decarboxylation In Multiphase System And Over Various Solid Acid Catalysts
… liquid and gas phases over various catalytic systems aiming at improving the efficiency in selective preparation of target product. An initial attempt was made in a biphasic reactor to improve the yield to PEA catalyzed by mineral acids (H2SO4). A wide range of solvents was tested for their …
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Investigation of Dibenzothiophene Removal from I Organic Phase: Enzymatic Approach vs. Ionic Liquids
… and successfully demonstrated using a biphasic system involving dibenzothiophene (DBT) hexane solution and 1-Butyl- 3-methyimidazolium tetraflouroborate, which forms the heavier layer in the system. The effects of different factors that may influence the extraction process with the …
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A Microcosm-Based Investigation into Oxidized Nitrogen Removal in the Hypolimnetic Waters of the Occoquan Reservoir of Northern Virginia
… interactions. The microcosm system developed was a biphasic system, consisting of a single continuous stirred tank reactor (CSTR), or a series of CSTRs containing representative sediment and water samples from the reservoir. The system was configured to simulate the bottom …
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Model-based experimental analysis of enzyme kinetics in aqueous-organic biphasic systems
… transfer, and diffusion were studied in separate systems. Each system was individually investigated using the model-based experimental analysis (MEXA) approach including a priori simulations, sensitivity analysis, and optimal experimental design. This supports not only the development of …
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Effective interactions arising from resource limitations in gene transcription networks/
… can behave like an effective repressor or a biphasic system, and that a repression cascade can become bistable. The results presented in this thesis may be helpful to mitigate the undesirable effects arising from resource limitations in the future.
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Novel Functional Graphene and its Thermodynamic Interfacial Localization in Biphasic Polyolefin Systems for Advanced Lightweight Applications
… (PE) and Polypropylene (PP), in a macro-micro biphasic polyolefin system, with PE representing the macro phase. An alternative and inexpensive Graphene Oxide (GO) modification is performed for synthesizing a novel functional graphene. Then, a thermodynamically driven mixing mechanism of the …
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Diversity oriented, computer guided catalyst design: Application of chemoinformatics to catalysis
… of ammonium ions at the interfacial region of a biphasic system, allowing for its use as a general descriptor for transport-limiting PTC rate approximations
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Liquid-liquid extraction of carotenoids from palm oil (Elaeis guineensis)
… for the solvent mixture and the tendency of biphasic system formation. The total carotenoid extraction increased with increasing temperature, with 50 °C having the highest extraction, followed by 45 and 40 °C. Equilibrium data for a system composed of palm oil + anhydrous ethanol + DMSO at …
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Engineering novel tandem reactions using organometallic catalysts and (metallo)enzymes
… tandem reactions between these two catalytic systems, with a par-ticular interest on combining cytochrome P450s and enoate reductases with organometallic cata-lysts. On the one hand, considerable efforts in transition-metal catalysis have culminated in prac-tical and efficient transformations …
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Engineering novel tandem reactions using organometallic catalysts and metalloenzymes
… two catalysts can effectively work together in a biphasic system, for a successive isomerization and epoxidation of alkenes and short olefinic acids. However, we observed that under the reaction conditions, the trans- to cis- isomerization rate of olefins is too slow. Lastly, we also found that …
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NEW BIOCATALYTIC PLATFORMS FOR THE SYNTHESIS OF HIGHLY VALUABLE COMPOUNDS THROUGH INTENSIFIED BIOPROCESSES
… this thesis focused on the use of a whole-cell system to perform biooxidations of benzyl alcohols mediated by endogenous dehydrogenases of acetic acid bacteria (AAB), getting access to the corresponding carboxylic acids. As key study, I studied the selective de-symmetrisation of …