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Showing 1 to 20 of 24 for “"hydrolysis reactions"”.
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Oxidation and hydrolysis reactions in supercritical water : chlorinated hydrocarbons and organosulfur compounds
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1995.
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Kinetic studies of the hydrolysis reactions of ruthenium (III) complexes hIm trans-[RuCl₄(im)₂] and hInd trans-[RUCl₄(ind)₂] by uv-visible spectrophotometry
… into antitumor active species in the body by hydrolysis, redox reactions, and reactions with biologically occurring nucleophiles. My project involved the synthesis of two ruthenium complexes with different ligands and the study of the hydrolysis reactions under different pH at room temperature …
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Experimental and Modeling Studies of the Stability of Pitting Corrosion on Pure Aluminum in Basic Chloride Solutions
… model was expanded to include homogeneous bulk reactions for hydrolysis and complexation reactions. The model predicted pH values of 2.5 to 3.0, values that agreed well with experimental measurements, only when the first two hydrolysis reactions of aluminum were included in the model. The …
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The kinetics of successive aquation reactions of tetraamminepalladium (II) ion
… were made up and analyzed. The following acid hydrolysis reactions of tetraamminepalladium (II) ion were studied by ultraviolet spectroscopy. First order rate constants were evaluated for each step of the reaction series at various temperatures. Activation parameters were determined. …
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Diels-Alder Reactions of 5-[Methoxypoly(Oxyethylene)]-(3E)-1,3-Pentadiene
… (Ib). Diels-Alder reactions of Ia and Ib with acrolein, maleic anhydride, and diethyl acetylenedicarboxylate have been performed. The products of these reactions have been analyzed by spectroscopic techniques. The Diels-Alder adducts of Ia with maleic anhydride and …
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Carbonyl Catalysis: Hydrolysis of Organophosphorus Compounds and Application in Prebiotic Chemistry
… used as the substances for aldehyde-catalyzed hydrolysis reactions. The first part of this thesis illustrated the strategy to combine carbonyl catalysis and electrophilic activation. The hydrolysis of organophosphorus compounds containing P(=O)-N bond were investigated based on Jencks and …
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Continuous Production of Palm Methyl Esters With Recovery of Carotenoids Using Membrane Technology
… of triglyceride, diglyceride and monoglyceride hydrolysis reactions followed second order kinetics up to 30 minutes of reaction time. The activation energy of the reactions were 14,658, 14,248 and 6,449 cal.mole-1.oK -1 for triglyceride, diglyceride and monoglyceride respectively. With a …
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EXPANDING APPLICATIONS OF IRON OXIDE NANOPARTICLES BY SURFACE FUCNTIONALIZATION: FROM MAGNETIC RESONANCE IMAGING TO NANO-CATALYSIS
… agents, specific-DNA MR probes and a biomimetic hydrolysis catalyst. Dendron-SPION conjugates (G1 to G3) have good aqueous solubilities and high transverse relaxivities (>300 s-1*mM-1). They also showed interesting strong pH-sensitive R2 and R2* relaxivities, which were governed by the clustering …
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Studies in coordination chemistry
… II, the present state of knowledge on the acid hydrolysis reactions of Cr(III) and Co(III) halo-amine complexes is reviewed. In Section B a kinetic study of the acid hydrolysis of bromoaquo (triaminotriethylamine) cobalt(III) ion is reported and the data compared with that of other Cr(III) and …
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Analysis of the effect of various ligands on the hydrolysis of ruthenium (III) complexes and interpretation of kinetics of hydrolysis profiles by UV-visible spectrophotometry
… are activated into antitumor drugs by means of hydrolysis, redox reactions, or reactions with biological nucleophiles. In these reactions, ruthenium is reduced to the active Ru(II) form from its inactive Ru(III) state. In this research work, three ruthenium complexes with different ligands of …
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Hydrolysis and Atmospheric Oxidation Reactions of Perfluorinated Carboxylic Acid Precursors
… a number of different environmentally relevant reactions that lead to the production of perfluorocarboxylic acids (PFCAs), a family of environmental pollutants that does not undergo any further degradation pathways. The compound perfluoro-2-methyl-3-pentanone (PFMP) is a new fire fighting fluid …
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Rational design and synthesis of zeolite acid catalysts for applications in biomass conversion
… through sequential transfer hydrogenation and hydrolysis reactions catalyzed by a mixture of Brønsted acid zeolite nanosheets and hydrophobic Lewis acid zeolites. Overall, this thesis demonstrates that a detailed understanding of the structure and active sites in zeolite acid catalysts can …
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Material development and characterization for high salinity water for desalination by membrane distillation at high temperature and pressure
… of carbon materials does not change due to hydrolysis at supercritical condition of water under anoxic conditions. Samples are extensively characterized using XPS (X-ray Photoelectron Spectroscopy), FTIR (Fourier Transform Infrared spectroscopy), XRD (X-ray Diffraction), AES (Auger Electron …
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Understanding the ATP hydrolysis mechanism in myosin using computer simulation techniques
… that convert energy from nucleoside triphosphate hydrolysis into mechanical work. A prominent example is myosin which drives muscle contraction and a large number of additional cellular transport phenomena in all living organisms. While hydrolyzing ATP, myosin translocates along an actin filament. …
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DNA catalysts as phosphatases and as phosphoserine lyases
… in vitro selection to catalyze several chemical reactions and several of those are of biological relevance. For in vitro selection or directed evolution of proteins, direct amplification is not possible, and it essential to attach the genotype to the phenotype. For nucleic acids however, the …
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The Chemical Synthesis of Model Catalysts Related to Enzymes
… each other and cause an increase in the rate of hydrolysis of the ester. The work in this thesis involved primarily the synthesis of these model compounds. The "lysohistidine derivative" is a complicated 2-α-aminoalkyl-histidine and the classical imidazole syntheses routinely used to make …
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Fluid-rock interactions in a carbon storage site analogue, Green River, Utah
Reactions between CO2-charged brines and reservoir minerals might either enhance the long-term storage of CO2 in geological reservoirs or facilitate leakage by corroding cap rocks and fault seals. Modelling the progress of such reactions is frustrated by uncertainties in the absolute mineral …
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Hydrothermal chemistry of methylene chloride and MTBE : experimental kinetics and reaction pathways
… the growing desire for sustainable technologies, reactions in benign solvents, such as hydrothermal water and supercritical fluids, have become the focus of many investigations. Hydrothermal water has been used as a medium for chemical reactions, where the enhanced dissociation constant of water …
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Understanding and Predicting Water Quality Impacts on Coagulation
… review describes factors affecting the hydrolysis reactions of metal salt coagulants and the resulting precipitates. Properties of two key contaminants, turbidity and natural organic matter (NOM), are explored in the context of removal during coagulation, and the influence of …
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The immobilisation of Thermus strain Rt41A proteinase and its use in peptide synthesis
… was therefore very similar to that found for hydrolysis reactions. The synthesis of Bz-Ala-Tyr-NH2 was optimised by studying the effect of pH, temperature, solvent concentration, ionic strength and nucleophile and acyl donor concentration on the partition constant and the maximum yield. The …
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