Browsing Electronic Theses and Dissertations by Discipline "Chemistry"
Now showing items 21-40 of 121
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Dielectric relaxation and infrared studies of hydrogen bonding
(1985)Dielectric relaxation and infrared study of a number of associating (H-bonding) compounds in glassy media, mainly polystyrene, have been carried out. The dielectric measurements by a General Radio 1621 Precision ... -
Dielectric relaxation studies of some diaryl molecules in polystyrene matrices
(1978)Dielectric relaxation studies of a number of diaryl molecules dispersed in atactic polystyrene and in some cases as solid discs have been carried out. Preparation of the polystyrene matrices and the solid disks, and the ... -
Dielectric studies of molecular and intramolecular motions in polystryrene matrices
(1977)Dielectric absorption studies of a variety of polar solutes containing rotatable groups and of some analogous rigid molecules dispersed in atactic polystyrene have been carried out. Preparation of the solutions as solid ... -
Dielectric studies of molecular motions in some solids
(1982)Dielectric absorption of a number of nonpolar, weakly polar and fairly polar molecules in the pure solid state are studied. Measurements of these solids using either a General Radio 1621 Precision Capacitance Measurement ... -
Dielectric studies of rigid and flexible molecules in various media
(1984)This thesis investigates mainly the molecular and intramolecular relaxation processes of some aromatic and aliphatic molecules containing rotatable polar groups and some analogous rigid molecules dispersed in (a) ... -
Dispersion and flocculation affinity of anionically charged kraft lignin
(2018)Softwood kraft lignin is a biodegradable, renewable, and environmentally friendly natural polymer. Although kraft lignin is widely produced in Canada, it is predominantly underutilized as fuel because it is only soluble ... -
The Effect of Pesticides on the Degradation of Oxobiodegradable Agricultural Mulch Films
(2015)Oxobiodegradable agriculture mulch films made from polyethylene (PE) are known to have many benefits for agriculture practice, including increased yields and resource efficiency, without the drawback of removing the ... -
Electrochemical oscillations during the anodic oxidation of sulfide
(2005)Sulfide is most often encountered as a waste product of the pulp and paper, petroleum, and mining industries. Organic decomposition is another major source of sulfide. During my M. Sc. program, I have studied electrochemical ... -
Flocculation performance of lignin-acrylamide derivatives
(2019)Wastewater produced in different industries contains fine suspended particles that raise a number of environmental concerns due to their potential toxicity and physicochemical properties and make their removal from industrial ... -
Gallium nitride, indium nitride, and heterostructure development using the MEAglow growth system
(2014-12-11)This thesis presents an in depth study of semiconductor development using a new process termed Migration Enhanced Afterglow (MEAglow). The MEAglow growth reactor is housed in the Lakehead University Semiconductor Research ... -
Growth and characterization of group III-nitrides by migration enhanced afterglow epitaxy
(2014-12-11)The work presented in this thesis investigates the growth and properties of group III- nitride semiconductors that were grown using the Migration Enhanced Afterglow Epitaxy (MEAglow) method. This work was to enhance the ... -
Hydrolysis of silicone polymers in aqueous systems
(2001)Silicon-29 and 'H NMR spectroscopy were used to investigate the hydrolysis of methyl silicones in a variety of aqueous environments. Dilute acid, dilute base and one or more of the dissolved constituents of blood plasma ... -
An investigation of saccharide complexation by aqueous oxoacids. Can oxoacids mediate A1-2 quorum sensing in bacteria?
(2013-02-12)The goal of this investigation was to determine whether it is plausible for bacterial AI-2 quorum sensing to be selectively regulated by environmentally available oxoacids. In particular, we investigated the ability of ... -
Investigation of the molecular basis for silicon biofunctionality
(2004)Despite advances in our understanding of the beneficial role of silicon in the biosphere, surprisingly little is known of the molecular mechanism by which silicon is absorbed, transported, accumulated and deposited by ... -
Lignin modification to produce hydrophobic products
(2017)Kraft lignin is not widely utilized for industrial applications. In this MSc work, kraft lignin was modified by grafting hydrophobic groups to produce hydrophobic materials. The main objective was to study the grafting of ... -
Low temperature pyrolysis of wood waste materials
(1976)The pyrolysis of jack pine bark, jack pine sawdust, and cellulose powder has been studied by thermogravimetric (TG), and isothermal weight-loss methods in both inert and oxidizing atmospheres. The effects of particle ... -
Microbial toxicity assessment and biodegradation of triclopyr using Arthrobacter globiformis and Pseudomonas pictorum
(1990)Triclopyr (3,5,6-trichloro-2-pyridinyloxyacetic acid) was investigated for biodegradation using Arthrobacter and Pseudomonas sp. bacteria. No evidence of the proposed major metabolite, 3,5,6-trichloro-2-pyridinol was found ... -
Molecular and intramolecular relaxation processes of small molecules
(1980)The dielectric relaxation method was used to determine the activation parameters of some ethane derivatives and simple amides. A General Radio 1615-A capacitance bridge was utilized to obtain the energy barriers of the ...
