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Articles 1 - 30 of 130
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Characterization Of Pyrite From Gold Deposits, Peter John Maclean
Characterization Of Pyrite From Gold Deposits, Peter John Maclean
Digitized Theses
Pyrite associated with gold deposits has been characterized on the basis of morphology, optical and chemical microstructures, and minor and trace element geochemistry. Gold deposits studied include: Agnico-Eagle mine (Quebec), Fairview mine (South Africa), Bousquet mine (Quebec), Williams mine (Ontario), Dome mine (Ontario), Pistol Lake prospect (Northwest Territories), Freddies Consolidated mine (South Africa), Pilgrim's Rest Gold Field (South Africa), and Clontibret prospect (Ireland). Pyrite from Buchans (Newfoundland), Kosaka (Japan), Axial Seamount and Explorer Ridge volcanogenic massive sulphide bodies are included in the study. Colour-staining of polished surfaces of pyrite with a potassium permanganate solution enhances internal microstructures and facilitates detailed …
Structure/Function Studies Of Trypanosome Variant Surface Glycoproteins, Vern Bruce Carruthers
Structure/Function Studies Of Trypanosome Variant Surface Glycoproteins, Vern Bruce Carruthers
Digitized Theses
Antigenic variation is manifested by many prominent infectious organisms in adaptive response to host immunity. However, polymorphism in antigenic structure is often limited by the necessity to maintain functionality of the antigen. It follows that it may be possible to design molecularly defined vaccines capable of accounting for variable antigenic phenotype. For this reason, the focus of the present thesis was to develop a model system using trypanosome variant surface glycoprotein (VSG) for examining the effects of amino acid sequence variation on the specificity of antigenic determinants.;In order to assess the suitability for a model system of four VSGs (isoVAT …
Codes Andn-Ary Relations, Shyr-Shen Yu
Codes Andn-Ary Relations, Shyr-Shen Yu
Digitized Theses
The aim of this thesis is to develop a general mechanism for the construction of codes and to extract general properties of classes of codes. This mechanism makes it unnecessary to study various classes of codes separately--at least to some extent--by different constructions and properties.;To achieve this goal, the mechanism of characterizing classes of languages by binary relations is studied. Some general properties related to binary relations and languages are obtained. Moreover, three new classes of codes, n-shuffle codes, solid codes, and intercodes are constructed. Solid codes and intercodes have the synchronous decoding property which is very useful in the …
Psychological Well-Being: Personality And Social Role Perspectives, Kathryn Ann Dance
Psychological Well-Being: Personality And Social Role Perspectives, Kathryn Ann Dance
Digitized Theses
This thesis was concerned with an examination of psychological well-being, defined as consisting of negative affect, positive affect, and self-esteem. Two distinct approaches to well-being were identified (i.e. personality and social role). It was argued that well-being is likely determined by both personality and social role influences, and that these two areas might themselves be interrelated. Both cognitive and affective personality factors were included in this research (i.e. dysfunctional cognitions and affect intensity). Roles were examined at a general level (number of roles and their cognitive representation in terms of complexity) and at a specific level that included assessments of …
Canadian Retail Companies Doing Business In The Us Market: A Cultural Perspective, Shawna C. O'Grady
Canadian Retail Companies Doing Business In The Us Market: A Cultural Perspective, Shawna C. O'Grady
Digitized Theses
Over the past decade, several successful Canadian retailers have entered the United States market with mixed results. Until recently, the reasons for their success or failure had not been investigated.;This research project involved an examination of what accounted for the success or the failure of Canadian retail organizations, in the United States market, from a cultural perspective. It was designed to: (1) determine whether Canadian retail executives perceived any cultural difference to exist between Canada and the United States, and how this difference (if any) contributed to their success or failure in the U.S. market; (2) to examine the decision …
The Organization Of The Maize Photosystem Ii Light-Harvesting Apparatus Under Normal And Chilling Conditions, Douglas A. Campbell
The Organization Of The Maize Photosystem Ii Light-Harvesting Apparatus Under Normal And Chilling Conditions, Douglas A. Campbell
Digitized Theses
The maize light harvesting system is structurally and functionally perturbed by chilling stress, with alterations in fluorescence parameters and protein processing. The molecular basis for these changes was investigated through biochemical analysis of the photosystem II-associated light-harvesting complexes (LHC II) of maize mesophyll thylakoids.;LHC II complexes from thylakoids were separated into three populations by mildly-denaturing electrophoresis. LHC II-1 contains four polypeptides and is equivalent to the oligomeric LHC IIb complex of Thornber et al. (1988). A less abundant oligomeric band, LHC II-2, contains a subset of the LHC IIb polypeptides, along with the LHC IIa complex (CP 29). The LHC …
Part I N-Acylindole 2+2 Photocycloaddition Reactions Part Ii Enone 2+2 Photocycloaddition Reactions, David J. Hastings
Part I N-Acylindole 2+2 Photocycloaddition Reactions Part Ii Enone 2+2 Photocycloaddition Reactions, David J. Hastings
Digitized Theses
Part I. Ultra-violet irradiation of N-acylindoles in the presence of alkenes results in the formation of 2+2 photocycloadducts containing a cyclobutane ring derived from the bonding of the alkene termini to the 2 and 3-positions of the indole. The reaction proceeds via the triplet excited state of the N-acylindole with a quantum yield of product formation which is much less than that of the quantum yield for intersystem crossing. The reaction's inefficiency is explained by the existence of 1,4-biradical intermediates which can undergo cleavage to yield ground state starting materials in competition with ring closure to give the observed photocycloadducts. …
The Cytoskeleton In The Syncytial Epithelium Of Adult Schistosoma Mansoni, You Zhou
The Cytoskeleton In The Syncytial Epithelium Of Adult Schistosoma Mansoni, You Zhou
Digitized Theses
The surface layer of Schistosoma mansoni is an anucleated syncytium, covered by an apical plasma membrane (APM) and an overlying envelope (En), and is connected with the subsyncytial cell bodies via the membrane-bound cytoplasmic connections (MCC). This syncytium is considered as an adaptation for rapid and synchronous renewal of the surface membranes which play an important role in evasion of the host's immune system.;The present studies demonstrated the effects of the third complement component (C{dollar}\sb3{dollar}) and serotonin (5HT) on the synthesis of the discoid bodies (DBs) and multilamellar bodies (MLBs), and major syncytial inclusion bodies in vitro. With short-time incubations …
Carlyle And The Economics Of Terror: A Study Of Revisionary Gothicism In "The French Revolution", Mary Desaulniers
Carlyle And The Economics Of Terror: A Study Of Revisionary Gothicism In "The French Revolution", Mary Desaulniers
Digitized Theses
Carlyle's The French Revolution occupies a distinctive place in literary history; its obscure and resistant style, its unrelenting use of Gothic overtones and its deliberate cultivation of equivocalness are part of a linguistic economy that challenges the currency of the sign. Reduced in function to an exchange value, the current sign participates in an arbitrary discourse which Carlyle overcomes with the motivating dynamics of German Transcendental Philosophy. To this end, paper money is exposed as an act of misrepresentation; its validity substantiated by arbitrary and conventional agreement, paper money remains a "wagered" word, a "contractual "sign or general equivalent. In …
The 'Bildungsgedicht' As Garden In Nineteenth- And Twentieth Century Canadian Long Poems, Wanda Ruth Campbell
The 'Bildungsgedicht' As Garden In Nineteenth- And Twentieth Century Canadian Long Poems, Wanda Ruth Campbell
Digitized Theses
Much of the recent interest in the Canadian long poem has centered on poems that have been written in the last two decades. This thesis links the contemporary Canadian long poem with earlier developments by examining one kind of long poem that appears throughout Canada's literary history: the Bildungsgedicht or "formation poem" in which the creation of community parallels the creation of character. Like the Bildungsroman, these poems deal with "the formative years or spiritual education" (OED) of characters, but within the context of the growth and development of communities, often using the topos of the garden with its varied …
Nonpioneering Strategy And Market Share Performance, Hadi Satyagraha
Nonpioneering Strategy And Market Share Performance, Hadi Satyagraha
Digitized Theses
Despite the prevalence of nonpioneers in most product-markets and their market share success in many, empirical studies on timing of market entry and market share performance have focused largely on market pioneers. However, there is reason to suspect that the findings for market pioneers will not be equally valid for nonpioneers because of the systematic differences in their sets of skills and resources.;This study began by postulating that successful market share strategies are different for market pioneers and nonpioneers. It proposed to test relevant variables hypothesized to affect the market share performance of nonpioneers: (1) timing of market entry; (2) …
High-Resolution Core-Level Spectroscopies Of Molecular Silicon Compounds Using Monochromatized Synchrotron Radiation, John D. Bozek
High-Resolution Core-Level Spectroscopies Of Molecular Silicon Compounds Using Monochromatized Synchrotron Radiation, John D. Bozek
Digitized Theses
High-resolution core-level photoabsorption, photoelectron and photoionization mass spectra of numerous substituted silane molecules have been measured in the gas phase around the Si 2p ionization edges using monochromatized synchrotron radiation. Photoabsorption spectra were also measured around the Si 2s ionization edges and the Cl 2p ionization edges of the chlorine-containing molecules. Multiple-scattering X{dollar}\alpha{dollar} calculations were performed to aid in the assignment of the peaks observed in the photoabsorption spectra. The chemical series approach, where the effects of small systematic chemical changes in the composition of the molecule under study on the observed spectra provide useful aids for assignments, has been …
Positron Annihilation Studies Of Defects In Silicon, Peter J. Simpson
Positron Annihilation Studies Of Defects In Silicon, Peter J. Simpson
Digitized Theses
Measurements of Doppler-broadening of annihilation radiation from variable-energy positrons have been applied to examine the nature and distribution of defects in ion-irradiated silicon. Positron measurements were supplemented by ion backscattering/channeling to determine displaced atom distributions, and infrared absorption measurements to determine divacancy concentrations. Silicon (100) wafers were irradiated at 300K with helium ions at energies from 0.25 to 4.0 MeV and fluences from 10{dollar}\sp{lcub}13{rcub}{dollar} to 10{dollar}\sp{lcub}16{rcub}{dollar} cm{dollar}\sp{lcub}-2{rcub},{dollar} and with silicon ions at energies from 0.5 to 5.0 MeV and fluences from 10{dollar}\sp{lcub}11{rcub}{dollar} to 10{dollar}\sp{lcub}15{rcub}{dollar} cm{dollar}\sp{lcub}-2{rcub}.{dollar} Defect annealing was observed through the divacancy annealing stage {dollar}(\sim{dollar}470 to 570K). He-irradiated silicon was …
Natural Lta Tumor Cell Resistance To Malignant Conversion By Oncogenesras Andmyc, Alan Bradley Tuck
Natural Lta Tumor Cell Resistance To Malignant Conversion By Oncogenesras Andmyc, Alan Bradley Tuck
Digitized Theses
A tumorigenic, non-metastatic murine fibroblast cell line (LTA) was here used to study aspects of natural cellular resistance to induction of progression to malignancy. The nature of LTA cell growth was established by testing both in vitro and in vivo. In vitro growth showed some but not all characteristic features of transformation (eg. cells showed little contact inhibition of cell growth and were able to multilayer, but were not serum independent). In vivo tumor growth was that of a benign (non-metastatic) fibrosarcoma. Attempts were made to induce LTA cell progression to malignancy by both epigenetic and genetic means. Treatment of …
Behaviour Of Heavily Reinforced Embankments On Soft Foundations, Brian Lucien Mylleville
Behaviour Of Heavily Reinforced Embankments On Soft Foundations, Brian Lucien Mylleville
Digitized Theses
The behaviour of both geosynthetic and steel strip reinforced embankments constructed on soft foundations is investigated using the finite element method.;The results of finite element analysis are shown to be in good agreement with the observed performance of a full-scale geogrid reinforced embankment constructed on a very soft deposit of peat and organic silt. Stage I construction was back-analyzed using information obtained from the program of field monitoring together with engineering properties of the soils obtained from laboratory tests.;Finite element analyses are used to study the effects of reinforcement such as high modulus geosynthetics and steel strips, on the undrained …
Psychophysical Studies Of Binocular Interactions In Humans, Laurie M. Wilcox
Psychophysical Studies Of Binocular Interactions In Humans, Laurie M. Wilcox
Digitized Theses
Psychophysical investigations of binocular interactions have shown that there are at least two binocular channels in the human visual system. In addition to an interocular channel that responds to input to either eye, there is evidence of a binocular channel that acts as a logical AND-gate. This second binocular mechanism will only respond to simultaneous stimulation of both eyes with similar images. Support for the existence of this 'AND' mechanism has been provided by adaptation (Wolfe & Held, 1981, 1982; Wilcox, Timney, & St. John, 1990), and detection experiments (Cohn & Lasley, 1976; Cogan, 1987).;In predicting the results of adaptation …
The Kbo Model: Towards A Unified View Of Data, Behaviors, And Messages In Object-Oriented Database Systems, Li Yu
Digitized Theses
One of the most distinguished features of object-oriented databases (OODBs) is their support for users to populate both data and arbitrary behaviors in the same database. Consequently, the increasingly large population of arbitrary behaviors in OODBs demands a database approach to their management and manipulation. Current OODB models offer no capability of managing arbitrary behaviors as meaningful database objects, and thus fail to meet such a demand.;The goal of this research is to unify data, behaviors, and messages into a uniform notion of objects so that a single database approach can be developed to manage and manipulate such objects. The …
Fundamental Studies Of Interactions Of Water With The Nickel(110) Surface, Brian William Callen
Fundamental Studies Of Interactions Of Water With The Nickel(110) Surface, Brian William Callen
Digitized Theses
The adsorption of water on Ni(110) has been studied by electron stimulated desorption ion angular distributions (ESDIAD), Fourier transform infrared-reflection absorption spectroscopy (FTIR-RAS), low energy electron diffraction (LEED), nuclear reaction analysis (NRA), and work function measurements ({dollar}\Delta\Phi{dollar}). The major findings in this study are: The saturation coverage of the first chemisorbed layer of water is 0.5 water molecules per surface Ni atom or 0.5 ML (1 ML = monolayer = 1.14 {dollar}\times{dollar} 10{dollar}\sp{lcub}15{rcub}{dollar} molecules cm{dollar}\sp{lcub}-2{rcub}{dollar}). The first chemisorbed layer exhibits c(2 x 2) symmetry, and is bonded to the surface monomerically (no evidence of intermolecular hydrogen bonding) with the plane …
Touch Monkeys: Nonsense Strategies For Reading Twentieth-Century Poetry, Marion M. Parsons
Touch Monkeys: Nonsense Strategies For Reading Twentieth-Century Poetry, Marion M. Parsons
Digitized Theses
Literary nonsense is often relegated to the nursery. I suggest that much can be gained from considering the genre of nonsense (called "Nonsense" herein) and linguistic "nonsense" as challenges to sense which do not result in a continual deferral of stable meaning. Such a view of Nonsense facilitates the reading of avant-garde and experimental poetry.;Chapter one provides a taxonomy of Nonsense criticism, and attempts to sort out the various, often conflicting, critical "definitions" of literary nonsense. Chapter two adapts and extends Julia Kristeva's theory of poetic language to make possible a substantially different reading of nonsense language, and provides sample …
The Generation Of Cytotoxic Tumour Infiltrating Lymphocyte Clones Against Head And Neck Squamous Cell Carcinoma, Henry J. Lapointe
The Generation Of Cytotoxic Tumour Infiltrating Lymphocyte Clones Against Head And Neck Squamous Cell Carcinoma, Henry J. Lapointe
Digitized Theses
73 samples of H&NSCCa were processed for these studies. An enzymatic disaggregation protocol for the flow cytometric analysis of DNA content of tumour whole cell preparations was developed. Analysis of the tumour cell component without the need for incorporation of reference controls provided a more accurate assessment of DNA content of tumour cell populations. Six lines of H&NSCCa were established in vitro from fresh tumour samples. Tumour cell effects on PHA- or IL-2 stimulated proliferation of PBMNCs ranged from 61% and 45% suppression to 4% and 121% enhancement of the proliferative responses respectively. Flow cytometric analysis revealed a down regulation …
Food Limitation And The Adaptive Significance Of Clutch Size In American Coots (Fulica Americana), Todd William Arnold
Food Limitation And The Adaptive Significance Of Clutch Size In American Coots (Fulica Americana), Todd William Arnold
Digitized Theses
For many species of birds, egg formation costs are considered important constraints on timing of breeding, clutch size, and egg size. For American Coots (Fulica americana), body reserves and current food availability are both thought to affect these aspects of reproduction. In order to test the egg formation hypothesis, I conducted numerous observational and manipulative experiments on wild, free-ranging American Coots. Clutch size declined with laying date in five out of six years, contrary to seasonal patterns of food availability in prairie wetlands. Clutch size increased during two of three years in response to supplemental feeding. Laying date was only …
Images Of Voice In "Paradise Lost", Elizabeth M. Sauer
Images Of Voice In "Paradise Lost", Elizabeth M. Sauer
Digitized Theses
This thesis examines the relative status and authority of the poetic voices of Paradise Lost and Paradise Regained within a literary and socio-political context. The case against the monological function of the primary narrator has most recently been made by critics including Donald Bouchard and Jonathan Goldberg who discuss the dialogical nature of this speaker, and by Kathleen Swaim and Barbara Lewalski who examine the exchanges among the different narrators. Another scholar, Gordon Teskey, observes that before PL "few characters in non-dramatic literature appear as free as Milton's to choose their own story" (11). Milton's interpretive model of historical intervention …
A Numerical And Interferometric Study Of Natural Convective Heat Transfer From Divided And Undivided Vertical Channels, David Naylor
A Numerical And Interferometric Study Of Natural Convective Heat Transfer From Divided And Undivided Vertical Channels, David Naylor
Digitized Theses
A numerical and experimental study has been conducted on two-dimensional laminar natural convection heat transfer in an undivided and divided vertical isothermal channel. For the divided channel configuration, an isothermal plate at the same temperature as the channel walls was located on the channel centre line. The study examined the effect of Rayleigh number, plate-to-channel length ratio, vertical plate position, and plate thickness on the heat transfer from the channel walls, the dividing plate and the channel as a whole.;Solutions to both the full elliptic and parabolic forms of the Navier-Stokes and energy equations have been obtained for Prandtl number …
Paleomagnetic Constraints On Allochthonous Canadian Cordilleran Displacement: Results From Stikinia, British Columbia, Thomas Andrew Vandall
Paleomagnetic Constraints On Allochthonous Canadian Cordilleran Displacement: Results From Stikinia, British Columbia, Thomas Andrew Vandall
Digitized Theses
In this study the Canadian Cordilleran displacements inferred from paleomagnetic results have been reevaluated by reviewing the existing data base with the addition of new data. Results from the Eocene Ootsa Lake Group yield a pole position which is statistically indistinguishable from published 50 Ma reference poles for North America. This is consistent with paleomagnetic results from Stikinia, Quesnellia, southern Wrangellia, and the Coast Belt indicating that much of the allochthonous CC had docked with the craton by 50 Ma.;Paleomagnetic directions from the Early Jurassic Telkwa Formation from this study confirm, with improved precision, the data obtained by Monger and …
Governing The Law: The Canadian Department Of Justice In The Early Confederation Era, Jonathan Scott Swainger
Governing The Law: The Canadian Department Of Justice In The Early Confederation Era, Jonathan Scott Swainger
Digitized Theses
The creation and mandate of the Canadian Department of Justice mirrored a congruence of law and politics which, in itself, was a realistic product of Canada's colonial history. Compelled by a desire to reach the most beneficial conclusion to any given conflict or problem, the department employed a pragmatic approach in its responsibilities as legal advisors to the government. This flexibility was necessary not only because of the complexities and idiosyncracies of Canadian political life, but also in working out the vagaries of the British North America Act of 1867. Based upon the official correspondence and documents of the Department …
Evolving Policies And Institutional Arrangements In The Canadian Agri-Food Industry: An Analysis Of Differential Development Between The Dairy And Beef Livestock Sectors, Quentin P. Chiotti
Evolving Policies And Institutional Arrangements In The Canadian Agri-Food Industry: An Analysis Of Differential Development Between The Dairy And Beef Livestock Sectors, Quentin P. Chiotti
Digitized Theses
This thesis examines the evolving policies and institutional arrangements in the Canadian agri-food industry; specifically an analysis of differential development between the dairy and beef livestock sectors. Moving beyond the pluralist and other alternative explanations for the development of marketing boards, an integrative theoretical framework which incorporates a broader conceptual and theoretical approach was adopted to investigate the role of producers, agribusiness and the state in the agricultural policy-making process for each agri-food sector. Two specific periods of conflict were examined, which represented significant attempts to introduce a marketing board as a means to resolve a crisis that was afflicting …
Characterisation Of The Photosynthetic Responses Of Spring And Winter Wheat To Growth At Cold-Hardening Temperatures, Vaughan M. Hurry
Characterisation Of The Photosynthetic Responses Of Spring And Winter Wheat To Growth At Cold-Hardening Temperatures, Vaughan M. Hurry
Digitized Theses
In vivo room temperature chlorophyll a fluorescence coupled with CO{dollar}\sb2{dollar} and O{dollar}\sb2{dollar} exchange are measured to determine the effect of cold-hardening on the photosynthetic capacity and the susceptibility to photoinhibition of six cultivars of wheat (Triticum aestivum L.), covering a range of freezing tolerance. The role of the photosystem II (PSII) repair cycle in resistance to, and recovery from, photoinhibition is assessed at both low temperatures (5{dollar}\sp\circ{dollar}C & {dollar}-3\sp\circ{dollar}C) and in the presence of the 70S protein synthesis inhibitor, chloramphenicol. The effect of long-term, repeated photoinhibitory events and sustained reduction in PSII efficiency on net carbon gained is also assessed.;Winter …
The Use Of Accounting Numbers In Debt And Preferred Share Covenants: Some Canadian Evidence, Julien Bilodeau
The Use Of Accounting Numbers In Debt And Preferred Share Covenants: Some Canadian Evidence, Julien Bilodeau
Digitized Theses
Utilizing a random sample of 152 contracts that relate to public issues of debt and preferred shares made by Canadian firms over the period of 1978 to 1987, this thesis provides some empirical evidence on the use of accounting numbers in the contracting process. More specifically, it addresses three main research questions: (1) Does financial accounting play a contractual role? (2) Is it reasonable to use the debt/equity ratio as a proxy for "closeness" to breach a debt covenant? (3) Can we predict/explain the use of accounting numbers in the contracts under study?;It appears that accounting numbers are used in …
The Effects Of Self-Referencing In The Processing Of Linear Ordering Relations, Hsiao H. D'Ailly
The Effects Of Self-Referencing In The Processing Of Linear Ordering Relations, Hsiao H. D'Ailly
Digitized Theses
The purpose of the present research was to investigate the effects of self referencing in the processing of linear ordering relations in a task designed to simulate certain aspects of classroom mathematics instruction. In each of three experiments, undergraduate students enrolled in an introductory psychology course were asked to read a series of paragraphs each of which contained a 5-term linear ordering relation (e.g., {dollar}\rm A>B>C>D>E).{dollar} After this information was encoded, subjects were asked to make pair-wise comparisons of these 5 terms. Two major factors were tested: the inclusion of a "You" term (Self-Referencing) among the …
Predictive Inference For The Multilinear Models With Multivariate Student-T Errors, Shahjahan Khan
Predictive Inference For The Multilinear Models With Multivariate Student-T Errors, Shahjahan Khan
Digitized Theses
The prediction distributions of the future responses, conditional on the observed responses, from the multilinear models with multivariate Student-t and matrix-T errors are derived. These distributions provide the basis for the inference about the future responses. The cases of (i) dependent but uncorrelated and (ii) dependent and correlated responses are considered. The distribution of the Wishart matrix, and the prediction distribution of the regression and Wishart matrices have also been obtained for the generalized multilinear model with matrix-T errors.;For the multilinear models with first order auto-correlation, the marginal likelihood function of the auto-correlation coefficient has been obtained and used for …