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Showing 1 to 20 of 46 for “"solution properties"”.
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Solution Properties of Some Iron and Copper Macrocycles.
Solution studies were conducted on iron(ll) phthalocyanine (FePc) and three copper macrocycle complexes. Concentrations of saturated solutions of FePc in pyridine, 2-methylpyridine, 3-methy1 - pyridine, and 4-methyl pyridine were determined from visible spectral data, and in dimethyl sulfoxide …
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Effects of Charge Distribution on Protein Solution Properties
In this study, the electrostatic properties of a series of proteins are characterized experimentally and related to theoretical predictions. The strength of protein interactions is characterized as a function of solute concentration, pH, and ionic strength. The strength of interaction and the …
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Solution Properties of Polymer Nanostructures Studied by Scattering Techniques
The main aim of this thesis is to understand the solution properties of flexible cylindrical polymer brushes, dendronized polymers and the thermosensitive microgel systems. The work comprises of different polymer nanostructured systems mainly studied by using the scattering techniques at the …
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Solution properties of some gaseous hydrocarbons in water-alkanol mixtures
… Using standard procedures, ΔG ΔH and ΔS of solution have been evaluated and expressed as functions of temperature and solvent composition. The observed variations in these functions and their dependence on temperature and alcohol concentration are then related to current theories of water …
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Synthesis and Solution Properties of Semi-rigid Polyelectrolytes and Polyampholytes
… stilbenes in copolymers affects the resulting solution properties and their controlled radical polymerizations. Substituted stilbene monomers readily polymerize in an alternating fashion with acceptor comonomers such as maleic anhydride and maleimide. These sterically crowded polymer backbones …
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Investigations of the solution properties of both unmodified and modified cyclodextrins
… linkage is examined. We then investigate the solution properties of cyclodextrin solutions using both ultrasonic interferometry and molecular dynamics.
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Solution properties and molecular size of polyhydroxybutyrate from recombinant Escherichia coli
… coli were evaluated in terms of their size in solution to develop and test a hypothesis concerning the regulation of the molecular weight of PHB during in vivo polymer production. Two recombinant strains of E. coli were used to produce material for this study: DH5a/pAeT41, containing the native …
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Theoretical prediction and experimental measurement of micellar solution properties of surfacant mixtures
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1998.
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pH-Responsive Polymers for Biosurfaces: An Investigation of Solution Properties and Surface Modifying Performance
… In this study, we determined a number of the solution and polymer properties that control deposition, adsorption and adhesion in Gantrez® polymer aqueous solutions to model dental surfaces. QCM studies specifically showed that polymer adsorption to model hydroxyapatite surfaces occurred only …
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Prediction of electrolyte solution properties using a combined Debye-Huckel, association and solvation model
… The activity of water in NaCl, NaOH, and HCl solutions is fit with maximum deviations from experimental values of 0.78%, 0.79%, and 2.09%, respectively. Ion size parameters, å, were modified slightly from literature values. Hydration numbers for individual species were chosen on the basis of …
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Study of the dilute solution properties of various homo- and block co-polymers by variable temperature size exclusion chromatography
… (VTSEC) was used to study the dilute solution properties of various homo- and block copolymers as well as polymer blends, focus being primarily on the configuration-dependent properties such as average chain dimensions and hydrodynamic behavior of polymers. The study constituted of …
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Theoretical modeling of micellization and solubilization in ionic surfactant systems
… of the surfactant is based on its aqueous bulk solution properties, including its micellization characteristics and its micellar solubilization characteristics (that is, the capacity of the surfactant micelles to encapsulate hydrophobic solutes in their interior, leading to a significant …
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A spectroscopic investigation of the thermodynamic properties of liquid organic mixtures
… in order to further enhance our understanding of solution properties.
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Siam weed based hydrogel hybrid for tissue engineering
… for infected wounds due to lack of therapeutic properties and their mechanical properties are yet to be defined. In this research, Siam Weed therapeutic properties promote healing process and its mechanical properties were enhanced by gelatin and electrospinning technique to produce Siam …
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Chemical Studies of Coulombic Complexations in Polymers
… conformations of polymer chains but also the solution properties and physical properties of polymer films.
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Dilute solution studies of molecular weight distributions of nitrocellulose, modified lignins and PMMA graft polymers
Dilute solution properties of three difficult-to-analyze macromolecular systems were investigated and clarified. Two were notorious for having highly time-in-solution dependent properties, nitrocellulose and lignin, while the third was an ideal model branched methacrylate polymer with which to …
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Modeling and experimental analysis of electrospinning bending region physics in determining fiber diameter for hydrophilic polymer solvent systems
… transport, and changing jet geometry. Since the solutions studied are hydrophilic, they readily absorb ambient moisture. This thesis explores the role of the bending region in determining the resulting electrospun fiber diameter through a combined experimental and modeling analysis for a variety …
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A study on organic fouling of reverse osmosis membrane
… (such as pH, ionic strength, ion type) of solution chemistry had significant impacts on the fouling potential of organic solution. Additionally, apart from feed solution properties, more variables affected the organic fouling development in a long RO membrane channel, where it was found …
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Dynamics in a photoresponsive surfactant system
The study of surface tension and other surface properties is motivated by the large number of industrially relevant processes involving interfaces, such as coating, detergency, printing, foams, and so forth. These surface properties become increasingly important as the length scale of the system is …
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