Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 22 for “"Solvent properties"”.
-
Synthesis and Solvent Properties of Tetraalkylammonium Tetraalkylborides
Made available in DSpace on 2014-12-10T23:01:43Z (GMT). No. of bitstreams: 1 7412034.pdf: 4506863 bytes, checksum: ec54623038ad432664693f788a18a2f3 (MD5) Previous issue date: 1973
-
Mechanisms of discharge product evolution and solvent stability in lithium-oxygen batteries
… Li₂O₂ discharge product. Side reactions with the solvent and electrode must be suppressed. This study seeks to improve understanding of the mechanisms of Li₂O₂ evolution and Li-O₂ decomposition reactions in order to design strategies to optimize capacity and stability. Decomposition reactions in …
-
Modeling advanced flash stripper for carbon dioxide capture using aqueous amines
… (ASM) were developed to generalize the effect of solvent properties on energy performance and guide solvent selections. High heat of absorption can increase partial pressure of CO2 at elevated temperature and has potential to reduce compression work and stripping steam heat. The optimum heat of …
-
An investigation of medium effects on the one and two-dimensional electronic spectroscopy of chlorophyll a
… Our work aims to study the spectroscopic properties of the best known pigment involved in the photosynthesis, Chlorophyll a, and their changes with different solvents. The study of the pigment was conducted by linear spectroscopic studies for water-solvent mixtures, while by the nonlinear …
-
Phase behaviour of multicomponent systems from computer simulations
… biomolecular solutions and deep eutectic solvents, each having their own distinct characteristics and complexities. Firstly, we explore the process of biomolecular phase separation to form multicomponent biomolecular condensates, which are ubiquitous in cells and are crucial for the …
-
The Modification of Solvents for Liquid-Liquid Extraction Processes
The ability to modify the efficiency of selected solvents in liquid-liquid extraction by the addition of small amounts of additives would offer advantages in extraction, solvent recovery and inventory costs. Therefore, the literature relating to desirable solvent properties, variations in solvent …
-
Electrolyte Structure with Explicit Solvent in Nanoslit Capacitors using Classical Density Functional Theory
… based on the Poisson-Boltzmann equation where solvent is treated implicitly as a dielectric background and ions are treated as point charges. Although this theory works well for macroscopic charge distributions, it is known to lead to problems in nanopores when finite size and interfacial …
-
The use of ion pairs to increase the percutaneous delivery of diclofenac
… through rational counterion selection and solvent optimisation. The investigation progressed through three phases. First, potential amino acid counterions were identified based on size, toxicity and charge compatibility. Distribution coefficient studies evaluated their effectiveness in …
-
Tailoring Fluoride/Fluorine Bond Activity for High-Energy Li and Li-ion Batteries
… the dominating effect of the electrolyte solvent properties on lithium fluoride (LiF, one of the discharge products) nucleation and growth was demonstrated. The electrode passivation induced by LiF is mitigated via increasing the fluoride solvation strength of the solvents, resulting in …
-
Computational Studies of Bio-Inspired Synthetic Random Heteropolymers
… modes and heterogeneous surfaces in water, properties which scale predominantly with composition rather than particular sequence motifs. We then study the impact of solution environment, examining polymer response to varied solvent properties. Modulation of electrostatic and polar …
-
Physical phenomena of thin surface layers
… be varied, to be used effectively, the physical properties of these films and the factors influencing their stability need to be well understood. Surfaces can have a strong effect on the stability of thin films. In thin films of polymer blends, wetting layers rich in one component often form at the …
-
Advanced Process Design and Modeling Methods for Sustainable and Energy Efficient Processes
… petroleum feedstocks using new ionic liquid (IL) solvents. ILs are very popular in literature to replace conventional organic solvents with their main novelty being non-volatility. A practically limitless number of ILs with different properties can be synthesized introducing the potential to …
-
Ionic conductivities in mixtures of N,N-dimethylformamide with water
… (DMF) and water have been the solvents for 13 conductance runs involving the solutes CsCl, KCI and KNCS. The table below summarizes the solutions and solvent compositions for which limiting equivalent conductances have been determined. A flaskcell has been designed to facilitate …
-
I. The Reaction of Carboxylic/Thiocarboxylic Acids with Isonitriles II. Ruthenium Hydride Ring Opening of an Azetidinium Cation
… cal mol-1K-1 in toluene. There is a dramatic solvent effect: hydrogen bond accepting solvents retard the rate of the reaction by deactivation of the carboxylic acid. A plot of log(rate constant) vs beta (hydrogen bond acceptor basicity of the solvent) is a straight line with a substantial …
-
The acceptability of alcohol fuels for automobile engines
… liquid droplet/liquid film phase etc.The solvent properties of the alcohols and their greater electrical conductivity suggested that the materials used on the engine would be prone to chemical attack. In order to determine the type and rate of chemical attack, an experimental programme was …
-
Membrane Processes for Sustainable Energy Applications
… the organic phase. The product has very good solvent properties and can be sold to improve the process economics. In our study, we identify a suitable membrane and combine it with a catalyst (strong acidic ion exchange resin) to achieve extraction and reaction in a single step. Thus, the …
-
Hydrothermal chemistry of methylene chloride and MTBE : experimental kinetics and reaction pathways
… 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 led to both acid- and …
-
Critical Quality Attributes of Topical Semi-solid Dosage Forms: Solvent Activity
… at characterizing either the physicochemical properties of APIs or bulk characteristics of the formulation itself. Solvent systems constitute a major proportion of semisolid cream type formulations and its inclusion is critical to overall product performance (drug delivery to skin). A majority …
-
Pattern Formation and Phase Behavior in PS-B-SI Containing Block Copolymer Thin Film
… interfacial roughness. In PS-b-PDMS system, a solvent-induced spherical structure was obtained and stabilized by preparing both the bulk and thin film from propylene glycol methyl ether acetate (PGMEA) solvent. Unlike other block copolymer thin film systems, this solvent induced spherical …
Page 1 of 2