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Showing 1 to 20 of 31 for “"reaction progress"”.
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Photochemical transformations of α-diazocarbonyl compounds in flow
… diazo transfer and subsequent photochemical reactions, enabling three steps to be carried out without the need to isolate or handle any hazardous materials. The use of Process Analytical Technologies (FlowNMR and FlowIR™) throughout this work provided key insights into reaction progress and …
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Synthesis and Catalytic Decomposition of a Lipid Hydroperoxide
Lipid oxidation involves the reaction of an unsaturated lipid with oxygen to form a lipid hydroperoxide. This process may take place in the presence of an enzyme or via an autoxidative pathway. The 13-hydroperoxide of linoleic acid will be synthesized using soybean lipoxygenase following published …
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Synthesis and analysis of reactive nanocomposites prepared by arrested reactive milling
… the interface area available for heterogeneous reaction between solid fuel and oxidizer components. Using aluminum as the main fuel and different metal oxides as oxidizers, highly energetic reactive nanocomposites with different degrees of structural refinement were synthesized. Specifically, …
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The interaction between chemical and mechanical processes during metamorphism: a microstructural and petrologic study of amphibolite shear zones, Cheyenne Belt, Southeastern Wyoming
… parallelism with the shear zone boundary and progressive grain size reduction. These observations indicate that strain magnitude increases across the shear zone. Detailed petrologic and microstructural analysis of a single amphibolite shear zone has been conducted in order to: 1) document the …
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Prozessorientierte Untersuchungen zur Schmierstoffsynthese basierend auf Ölsäuremethylester und Glycerintrioleat
… Both lubricants were synthesized in a two-step reaction via epoxidation of the double bond and ring opening via alcoholysis afterwards. With this modification the fatty acid esters were stabilized against air-aging and their viscosity was raised. Further on many side reactions were minimized and …
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DNS of inhomogeneous reactants premixed combustion
… combustion is represented by a complex chemical reaction mechanism with 18 species and 68 steps. The flame surface density (FSD) and displacement speed S_d have been used as the framework to analyse the inhomogeneous reactants premixed flame. The flames are characterised by an isosurface of …
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Palladium Catalyzed Hydrodechlorination of 4-Chloroanisole in Phosphonium Ionic Liquids
… the water content in the ILs, sampling reactions to follow their progress, data reproducibility, and analysis of reaction progress, as well as the impact of water on the rate of hydrodechlorination reactions in ionic liquids. After excluding results from obviously compromised reactions, …
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Deoxidation studies : The interaction of vitreous silica with molten aluminium and systems of aluminium, manganese, iron and silicon.
… isthermodynamically inevitable and leads to reaction effects in many systems. The resultant reactions can continue over a wide temperature range including both liquid and solid state systems such as molten aluminium handling units and the heat treatment of aluminium deoxidised steel. The …
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An electrochemical pipette with thin-layer design for rapid electrosynthesis and mechanistic study of the catalytic reactions
… synthesis. Electrochemical methods enable unique reaction pathways for both direct (electrode-driven) and mediated (redox-catalyst-assisted) systems through controlled electron transfer, access to reactive intermediates, and transformations that are inaccessible to conventional methods. However, …
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Automated microreactor system for reaction development and online optimization of chemical processes
Developing the optimal conditions for chemical reactions that are common in fine chemical and pharmaceutics is a difficult and expensive task. Because syntheses in these fields have multiple reaction pathways, a significant number of experiments are required to determine the conditions that …
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Manufacture of and Environmental Effects on Carbon Fiber-Reinforced PhenylEthynyl-Terminated Poly(EtherImide)
… of the influence of cure time and temperature on reaction progress via both reaction kinetics and monitoring of the glass transition temperature. From the rheological characterization, a two-stage, dual-Arrhenius model was developed to successfully model isothermal complex viscosity over the range …
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Übertragung der Produktion hydrophober Substanzen mit immobilisierten Biokatalysatoren in den technischen Labormaßstab
Biocatalysts play an essential role as reaction catalyst for synthesizing organic compounds due to their substrate-, stereo- and regiospecificity. While their natural environment is predominately the aqueous phase, many economically interesting reactants are poorly soluble in water. However, the …
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Valorisation of waste streams within the agri-food sector
… kinetic modelling of such material in terms of reaction progress, rate of reaction and activation energy associated with each heating rate applied to the material.<br/><br/><b>Note this thesis is heavily redacted for reasons owing to the commercial sensitivity of the subject matter. It would …
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Arsenic Release from Chlorine Promoted Oxidation of Pyrite in the St. Peter Sandstone Aquifer, Eastern Wisconsin
… of released sulfate ion, used here as the reaction progress variable. EPMA maps also reveal complete oxidation of pyrite cements to Fe-oxyhydroxides at 1200 mg/L "free chlorine" and pH 7.0. This behavior does not occur at lower concentrations or higher pH. Arsenic release to solution does …
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Role of fluids in geological processes
… seawater participates in important water-rock reactions such as hydrothermal alteration of the ocean floor, a process that is currently in the spotlight for hypotheses on the origin of life, as it is an environment where generation of abiotic carbohydrates occur. The ocean chemistry varied in …
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Fluid-rock interaction on alpine-type ultramafic rocks from the Norwegian Caledonides
… during the syn- and postorogenic processes. Reactions between rock and water-dominated fluid result in matrix alterations, the formation of veins, shear zones and mineral zonations. <br>Eight localities from the Upper- and Uppermost Allochthonous units of the Norwegian Caledonides were chosen …
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Investigation of condensed and early stage gas phase hypergolic reactions
… simultaneous physical mixing and chemical reaction. This process generates heat, intermediate condensed phase species, and gas phase species, which then may continue to react and generate more heat until ignition is achieved. The process is not well understood because condensed and gas …
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Development of Novel Biosensor Platforms for Point-Of-Care (POC) Diagnostics
… biosensors for real-time monitoring of LAMP reactions, with an ultimate goal of integrating these biosensors into LAMP-based POC diagnostics. The development of a pH-dependent LAMP master mix was necessary to overcome the challenge of detecting pH changes during the amplification process. The …
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Propagation and topology in turbulent premixed flames
… as the reactant mixture burning in the thin reaction zone regime. Here, preliminary break-up (through self-interaction) of the reaction zone is seen with increasing turbulence intensity, as the flame speed is simultaneously inhibited. Critical points in the reaction progress field - where the …
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Modelling of Spray Combustion with Doubly Conditional Moment Closure
… coupling of evaporation, mixing and chemical reaction. This leads to a wide spectrum of combustion regimes, where self-propagating premixed flames and diffusion-controlled non-premixed flames may occur simultaneously within the same flame. The physical processes involved in spray combustion …
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