identifier: Mannion, Michael R. <https://research.library.mun.ca/view/creator_az/Mannion=3AMichael_R=2E=3A=3A.html>   (1999) Synthesis and chemistry of highly distorted polycyclic aromatic hydrocarbons.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract: A significant feature of smaller cyclophanes and buckminsterfullerenes is the presence of nonplanar aromatic rings.  Such compounds are of considerable interest due to both the synthetic challenge they pose and to their unusual conformational, spectroscopic, and chemical behavior.  A great deal of work has focussed on determining the extent to which an aromatic ring can be distorted from planarity while remaining isolable under ambient conditions.  Although this question has been examined in detail for isolated benzene rings (for example, through investigations of [n]paracyclophanes), analogous studies of polycyclic aromatic hydrocarbon (PAH) frameworks have never been pursued. -- Here the first systematic examination of the distortion from planarity of a PAH moiety is reported.  The synthesis of a number of [n](2,7)pyrenophanes from [3.3]dithiacyclophane precursors is described.  Some physical, spectroscopic, and chemical properties of these molecules are also described, and a number of X-ray structures of markedly nonplanar aromatic moieties are reported.  From this data, it is concluded that the end-to-end bend of the most strained pyrenophane prepared is greater than the average end-to-end bend of the pyrene moiety.  However, POAV analysis of the pyramidalization of pyrenophane sp² carbon atoms reveals markedly lower pyramidalizations than are observed in D₅h C₇₀.  Attempts at the functionalization of [n](2,7)pyrenophanes in the hope of using them as precursors for larger nonplanar PAHs were made.  However, suitable conditions for functionalization of pyrenophanes were not found.  A synthetic approach to a C₂-chiral 1,6-[n]pyrenophane is also described. -- An attempted synthesis of a derivative of the buckybowl pinakene using a tandem Bergman cycloaromatization/free radical conjugate addition is presented. -- The experimental work is preceded by reviews of the literature concerning the concept of aromaticity, nonplanar aromatic molecules (especially [n]paracyclophanes) and fullerene fragments.


identifier: Lucas, Rhonda <https://research.library.mun.ca/view/creator_az/Lucas=3ARhonda=3A=3A.html>   (2001) Synthesis and oxidation kinetics of transition metal complexes.  Masters thesis, Memorial University of Newfoundland.

type: Thesis NonPeerReviewed

format: application/pdf application/pdf

abstract: The nickel (II) complexes of the deprotonated pendant-arm macrocycles 5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane-l,8-diacetic acid (L₁) and 5,12 dimethyl - 7, 14-diphenyl-1,4,8,11 tetraazacycIotetradecane-1,8-diacetic acid (L₂) have been prepared.  The oxidation kinetics of these complexes with peroxodisulfate have been studied.  Enthalpies and entropies of activation for Ni(II)L₁ are 39.5 ± 5.3 kJ.mol⁻¹ and -115 ± 5 J.K⁻¹. Mol⁻¹; and for Ni(II)L₂ the corresponding values are 42.8 ± 5.1 kJ.mol⁻¹ and -115 ± 5 J.K⁻¹. Mol⁻¹.  Outer-sphere oxidation of Ni(II)L, by bis - (triazacyclononane)nickel (III), [Ni(III)(tacn)₂]³⁻, has been studied and a self-exchange rate constant for the [Ni(II)L₁]⁰v- system has been estimated at 55 mol⁻¹ dm³ s⁻¹. -- The rac-Ni(II)L₂ complex and meso-Co(III)L₁₋ have been structurally characterized by X-ray crystallography.  The rac-Ni(II)L₂ complex shows a distorted cis-geometry about the metal while the meso-Co(III)L₁₋ complex show a trans octahedral geometry.


identifier: MacDonald, Carol Ann <https://research.library.mun.ca/view/creator_az/MacDonald=3ACarol_Ann=3A=3A.html>   (2000) Why take the chance?: a peer-led gambling prevention program.  Masters thesis, Memorial University of Newfoundland.

abstract: The following project provides an overview of the development of a program to raise awareness of youth gambling issues and to provide youth with the information and skills needed to make wise choices around their own gambling behavior. -- The program developed was supported by a literature review, guidance counselor survey, youth group focus test, and expert review. The results of this research indicted gambling, especially youth gambling, is a relatively new area of study and there is little developed in the way of programs to address this issue. It was also indicated the implementation of a peer-led gambling prevention program would be a positive step in the direction of youth gambling prevention. -- The findings led the researcher to develop the Why take the Chance? program. Why Take the Chance? is a peer-led gambling prevention program whereby senior high students are provided with the information and skills needed to deliver three sessions on gambling prevention to their junior peers at the intermediate level. -- The program consists of an overview of why youth gambling is an issue and the rationale behind using a peer-led approach, suggestions on how to implement this program within the school system, a train the trainer suggested inservice, a peer leader training workshop, three gambling prevention sessions, and an evaluation component. -- The Why Take the Chance? program will be available to school guidance counselors through the Community Health Addictions Services offices across the province.


identifier: Campbell, Roderick R. A. <https://research.library.mun.ca/view/creator_az/Campbell=3ARoderick_R=2E_A=2E=3A=3A.html>   (1982) A Kinetic theory of intercollisional interference effects in arbitrary gas mixtures.  Masters thesis, Memorial University of Newfoundland.

abstract: A kinetic theory of intercollisional interference effects in collision-induced translational absorption by arbitrary binary gas mixtures has been developed.  Expressions have been derived for the intercollisional dip in which no assumptions about the relative concentration ratios or relative masses of the two constituents have been made.  The variation of the halfwidth of the dip with the concentration ratio of the mixture has been obtained.  The halfwidths at the infinitely dilute endpoints, nA/nB￬0 and nA/nB￪ °° predicted by this theory are in agreement with previous theoretical results.  This theory also shows reasonably good agreement with the experimental data on the line shape as a function of nAnB for various concentration ratios.  Our curves provide the correct qualitative behaviour of the line shape. -- In addition, expressions have been developed for intercollisional interference effects in collision-induced translational absorption by mixtures of arbitrary composition.  That is, the above theory has been extended to include mixtures in which the number of constituents is arbitrary.


identifier: Marlita, Tita <https://research.library.mun.ca/view/creator_az/Marlita=3ATita=3A=3A.html>   (1997) "Ways of knowing" : Islamic customs of polygamy, veiling and seclusion in the autobiographical writings of Huda Shaarawi and Kartini.  Masters thesis, Memorial University of Newfoundland.

abstract: This research was grounded in the writer's assumption that Islam—with its polygamy and veiling practice—and feminism were not compatible. Being a student of Women's Studies, who believes in feminism, and a Muslim woman, the writer experienced a conflict. In an attempt to resolve this conflict in a scholarly fashion, two personal writings by two Muslim feminists, which reflected their struggles against polygamy and veiling, by Kartini and Huda Shaarawi were selected for analysis. In this study, the writer analyzes how these two feminists approached the issues of polygamy and veiling, and their development as feminists. This study also aims to examine how Kartini’s and Huda's writings reflected their struggles to define their own voices in both male-dominated and colonial culture. -- This study employed textual analysis and a life history approach. As a theoretical framework in discussing the formation of Kartini’s and Huda's feminism, and their approaches to issues of polygamy and veiling. Belenky et al.'s five epistemological categories of women's perspectives of knowing were utilized. These five categories are: silence, received knowledge, subjective knowledge, procedural knowledge, and constructed knowledge. -- This study concluded that: (1) both Kartini and Huda contended that problems concerning polygamy and veiling lay in the interpretation of the Koran, not in Islam itself: (2) Kartini’s and Huda's approaches to the issues of polygamy and veiling are contextually- grounded: (3) the formation of Kartini’s and Huda's feminism followed the five stages of women's ways knowing suggested by Belenky et al.: (4) both Kartini and Huda used autobiographical writings to assert woman's individuality and distinctiveness in male-dominated and colonial culture: (5) both Kartini and Huda refused to recognize their colonizers’ language to define their identities. -- Examining these two feminists’ approaches to Islam in general, and to polygamy and veiling practices in particular, helped the writer to resolve her own conflict between feminism and Islam. The interpretation of the Koran becomes a key in understanding the position of women in Islam. Facts about women in the Koran had been selected and interpreted from the dominant androcentric position and discourse. The Koran became the established religious text in which male interests were vested. Hence, as Muslim feminists suggest, the interpretation of the Koranic verses dealing with women's rights and status should be based on the evaluation of Muslim women in the early years of Islam when the true Islam existed.


identifier: Gambin-Pynn, Gloria <https://research.library.mun.ca/view/creator_az/Gambin-Pynn=3AGloria=3A=3A.html>   (1999) Technology enhanced guidance services : an exploration and example in a junior high setting.  Masters thesis, Memorial University of Newfoundland.

abstract: Computer technology and the World Wide Web (WWW) are increasingly being viewed as tools worthy of use in guidance counselling. Guidance counsellors must develop means to apply technology in their practices. The overall aim is to enhance various aspects of guidance service provision by integrating computer technology tools, especially, Internet resources. The following folio offers many ideas about, and utilizations for, technology in contemporary counselling. These papers further explore one specific area of technology (the WWW) that junior high school counsellors can utilize to provide diverse services to their clients (students, parents, teachers), and members of the larger school community. -- Today's professionals are faced with tremendous and constant change. Paper one discusses the changing role of today's guidance counsellors and the many challenges they face. Generally, it looks at those currently offered services that might be enhanced bv the use of information technology. Cautions for using these tools are offered. -- The second paper presents an overview of current and general technology resources useful to guidance counsellors and a discussion of counsellors' readiness to adapt these various tools. The paper explores the range of guidance services that can be augmented bv the use of technological resources. Specific illustrations of 'on-line' services are then presented. -- A model and prototype of one technologically enhanced guidance service are discussed in paper three.    Specifically, this paper considers the integration of traditional guidance services and WWW resources. A sample on-line guidance site provides a model counsellors might follow when developing web-based services in their own settings. Guidelines useful to those considering developing guidance websites, are also offered. Suggestions for evaluation are included as well.


identifier: Wong, Daniel <https://research.library.mun.ca/view/creator_az/Wong=3ADaniel=3A=3A.html>   (2000) A knowledge-based decision support system in reliability-centered maintenance of HVAC systems.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract: Studies have shown that in large physical systems, it is possible to eliminate or reduce costly machine failures, equipment downtime, lost production and decreased revenues by keeping abreast of the most effective and current maintenance techniques available. -- The purpose of this thesis is to propose a multi-faceted approach to maintenance which can address the short comings of conventional approaches to maintenance. -- The proposed methodology combines the reliability-centered maintenance technique (RCM), a fault tree analysis, a database system, and the Weibull analysis. The integration of these techniques produces an innovative system which increases the reliability and availability of the system. To the author's knowledge, this integrated approach has not been done before. -- As an example, the heating, ventilating and air conditioning (HVAC) of large buildings was used to illustrate this methodology. Failure data was collected from the Biotechnology. Arts and Administration Extension and Earth Resources Buildings of Memorial University of Newfoundland (CERR) over a six year period. The data included the time to failure and failure modes for each component within the central HVAC system. The collected data was used to quantify the reliability of the system. A probabilistic analysis based on the Weibull distribution was used to analyze the time to failure data. -- Using reliability-centered maintenance to identify the causes and impact of failures, the information acquired was used to develop fault trees. Failure modes identified in the fault trees were coded as identifiers to be used in a knowledge-based system for improving the reliability and availability of the system and its components. -- It was shown that system reliability can be improved by increasing the reliability of each component utilizing the proposed multi-faceted approach. Failure data analysis enabled us to quantify the reliability for many sub-components within the major components that constitute the HVAC system. -- It is concluded that the developed knowledge-based system enables us to troubleshoot causes of failure at a much faster rate and this will decrease the down time and increase the availability of the system.


identifier: Swyer, W. Robert <https://research.library.mun.ca/view/creator_az/Swyer=3AW=2E_Robert=3A=3A.html>   (1998) Teacher and student attitudes toward microcomputer-based laboratories (MBLs) in the province of Newfoundland and Labrador.  Masters thesis, Memorial University of Newfoundland.

abstract: The purpose of this thesis was to determine teacher and student attitudes toward Microcomputer-Based Laboratories (MBLs) in the province of Newfoundland and Labrador. A sample consisting of 53 teachers and 59 students responded to survey instruments designed by the author. -- The teacher instrument consisted of three sections. Section A had 7 multiple-choice items and was used to determine the extent of MBL use by teachers. Section B was composed of 34 statements that teachers responded to using a 5-point Likert scale. Section C was used to collect personal information. -- The student instrument consisted of two sections. Section A was used to obtain some personal information from the students. Section B was composed of 30 statements that students responded to using a 5-point Likert scale. -- The following questions guided the research: 1. To what extent have teachers and students used MBLs? 2. What are teachers' and students' attitudes toward MBL equipment and software? 3. Do teachers and students believe that MBL techniques enhance student learning? 4. Do teachers and students believe that MBL techniques enhance their physics courses? 5. Do teachers and students think that MBL techniques have affected students' attitudes toward science and computers? 6. How do teachers and students think the MBL approach can be improved here in the province? 7. Have MBL techniques affected teacher attitude toward computers? -- The majority of teachers indicated that MBLs were used both by students and themselves to collect and analyze data. About 19% of teachers said that students used the MBL equipment and software on their own. A small percentage of teachers indicated that they only used MBLs in demonstrations with their classes. Most teachers used MBLs for 1/4 or less of the time they spent on labs. Approximately 21% of teachers were using MBLs between 1/4 and 1/2 of the time and about 17% of the teachers were using MBLs between 50% and 100% of the time they spent in the lab. Some teachers and students reported that MBLs have been used in other science courses. -- Results from teacher and student surveys on the 5-point Likert statements indicate that teachers and students alike have overall positive attitudes toward MBLs with respect to MBL equipment and software, enhancing student learning, enhancing their physics courses, and affecting students' attitudes toward science and computers. As well, teacher attitude toward computers was positively affected. Teachers and students share the opinions that more computers should be assigned specifically to science labs, and that additional MBL equipment should be provided for use in the science lab. Also, teachers and students believe that MBLs should be used at least four or five times a year, and students, in general, would like to see MBLs used more often.


identifier: King, Ruth Elizabeth <https://research.library.mun.ca/view/creator_az/King=3ARuth_Elizabeth=3A=3A.html>   (1983) Variation and change in Newfoundland French : a sociolinguistic study of clitic pronouns.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract: The native French population of Newfoundland is with few exceptions restricted to four communities—L’Anse-à-Canards, Cap St.-Georges, La Grand’ Terre, and Stephenville—in Port-au-Port Peninsula/Bay St. George area of the west coast.  The French spoken here is a little-studied variety of Acadian.  In this thesis covariation of a number of phonological and grammatical variables with both linguistic environment and a number of social factors is quantified.  While the main orientation of the study is sociolinguistic, Labovism techniques developed for a single speech community have been implemented in the four Francophone communities of the area.  Thus the study combines elements of the dialect geographer’s approach with the methodology current in sociolinguistics. -- The dependent variables all relate to clitic pronoun usage.  They include phonological variation of third person subject clitics and of object clitics lui, leur, and en.  Grammatical variables include third person case and number marking, variation in cliticization of first, second, and third person object pronouns, of reflexive pronouns and of y and en. -- Both phonological and grammatical variation were found to be conditioned by linguistic and social factors.  For example, phonological environment affects deletion of the /1/ of third person subject clitics.  Loss of third person case marking is more prevalent in the faire-infinitive grammatical construction.  Unlike in many other socio-linguistic studies, the social variabIe sex did not condition variation to any great degree.  The intracommunity variable locality was found to be somewhat more important.  Younger speakers in one community, La Grand’ Terre, stood out as less conservative than their counterparts in other communities.  Age emerged as the most important nonlinguistic variable in this study.  Younger speakers, for example, tend to cliticize object pronouns less often than do older, speakers, which may well mark a linguistic change in progress.


identifier: Balasa, Balaji <https://research.library.mun.ca/view/creator_az/Balasa=3ABalaji=3A=3A.html>   (1995) Studies on experimental autoimmune thyroiditis in mice and rats with thyroglobulin and thyroglobulin peptides.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract: Experimental autoimmune thyroiditis (EAT) induced in mice or rats with thyroglobulin (Tg) emulsified in complete Freund's adjuvant (CFA) has been a model system to understand the immunopathogenesis of Hashimoto's thyroiditis (HT). I have demonstrated, by the immunotargeting approach, that adjuvant-free challenge of mice with small doses of mTg conjugated to monoclonal antibodies (MAbs) specific for class II MHC (I-Ak) expressed on APC, induces an mTg-specific IgG response in CBA (H-2k) but not in B6 (H-2b) mice. Priming of CBA mice with mTg conjugated to an irrelevant MAb (control) did not elicit an autoimmune response. Despite the induction of an mTg-specific IgG response, mononuclear cell infiltration of the thyroid was not detected in CBA mice thus indicating a clear divergence in the requirements for autoantibody (AAb) production and the requirements for disease. These findings may help elucidate the role of various APC subsets in autoimmunity and facilitate study of the initial events that trigger autoreactivity outside a CFA-induced granuloma site. -- Investigation in rats of the immunopathogenicity of a 17mer homologous (rat) Tg peptide, rTgP1 (2495-2511), revealed that TgP1-priming of F334, WKY and WF rats elicits lymph node cell (LNC) proliferative responses to the peptide in vitro without concomitant specific primary IgG responses.  LNC proliferative assays demonstrated that specific CD4⁺ T cells recognize TgP1 in the context of class II MHC and that TgP1 contains cryptic T cell epitope(s). Strong TgP1-specific IgG responses were not observed despite the presence of EAT in rats. These results provide the first evidence that a self-Tg peptide, TgP1, is immunopathogenic in rats. In contrast to 17mer TgP1, examination in rats of the immunopathogenicity of an 18mer rTg peptide, rTgP2 (2695-2713) revealed that TgP2- priming of rats induced specific LNC proliferative responses in F344, WKY but not in WF rats, although concomitant specific IgG responses were elicited in all three rat strains. Thyroiditis was readily induced in F344 rats both by direct challenge with TgP2 and by adoptive transfer with TgP2- specific T cells (CD4⁺, CD8⁻, TCR α/β⁺) indicating that peptide-induced rat EAT is a CD4⁺ T cell-mediated disease. Specific T cells recognize TgP2 in the context of class II molecules in an MHC-unrestricted fashion and TgP2 contains non-dominant T cell determinants. The TgP2-specific IgG (day 28) readily binds intact rTg and such binding could be abrogated by free peptide indicating the absence of "determinant spreading".  These results indicate that TgP2 is pathogenic in rats but differs in its immunogenicity from that of TgP1. -- Class II rat thyrocytes (IFN-γ treated), to address their putative APC function in TgP2-mediated EAT, were examined by testing their ability to present endogenous Tg epitope to the TgP2-specific cloned T cells.  Both unpulsed or peptide pulsed class II+ thyrocytes failed to activate the hybridoma (assessed by IL-2 release) suggesting that thyrocytes by themselves do not function as APC in vitro.  The findings that both glutaraldehyde fixation and irradiation of spleenocytes abolished their capacity to present TgP2 leading to activation of the 8F7-5 hybridoma raised the possibility that thyrocytes may be deficient in the expression of certain costimulatory molecules. These findings have implications for understanding Ag-presentation in thyroid autoimmunity. -- Examination of the relative serological immunodominance of the pathogenic TgP1 and TgP2 peptides revealed contrasting findings.  Priming of F344 rats either with homologous or heterologous Tgs did not elicit TgP1-specific IgG responses indicating the non-dominance of TgP1.  In contrast, homologous Tg-priming elicited TgP2-specific IgG response.  The immunogenicity of the TgP2 epitope(s) on heterologous Tgs varied dramatically, being highest on bovine Tg, intermediate on mouse Tg and undetectable on human and porcine Tgs although peptide-specific IgG readily cross-reacted with Tgs of various species.  Epitope analysis of heterologous Tg-primed sera revealed that TgP2-reactivity is directed to distinct B epitopes within TgP2.  These data provide the first evidence in EAT that variable immunodominance may partially explain why distinct Tg epitopes are recognized by MAbs in various species/Tg combinations and may have implications in serological screening of pathogenic Tg epitopes.


identifier: Clarke-Genge, Delores <https://research.library.mun.ca/view/creator_az/Clarke-Genge=3ADelores=3A=3A.html>   (2000) Women in educational administration : an internship report.  Masters thesis, Memorial University of Newfoundland.

abstract: The role of the female administrator is indeed a challenging and multi-faceted one. Various barriers exist to female administrators being adequately represented in administrative positions both at the school and district levels. This internship examined the roles and responsibilities of the female school administrator and chronicles the challenges the female administrator faces on a daily basis. In addition to chronicling those experiences at the school level, this report also examines the literature on women in school administration and what it suggests needs to be done in order to increase female representation in educational administration.


identifier: Allen, Lucy H. <https://research.library.mun.ca/view/creator_az/Allen=3ALucy_H=2E=3A=3A.html>   (2001) Vernacular music brokers and mediators in the South 1900-1932.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract: This thesis examines the intersection of business and aesthetics, music, and overlapping networks of people, all focusing on the sounds in the South during the first third of the twentieth century. It accomplishes this examination through a focus on the people who acted as mediators of the vernacular music found in the Southern United States. There are four major groups of mediators—folklorists, both in and outside of the academy; early Artist and Repertoire men working with the record companies; radio station managers and announcers; and the musicians. All had distinct preferences of the types of music they chose to collect and methods of dissemination. -- This thesis looks at the people, the choices made, and the impact those choices had on music today through the relationships and aesthetics of the people who worked actively to represent, transport, and transform vernacular music and musicians in the South from 1900 to the early 1930s. The motives of the collectors varied, but mainly they gave the music a broader exposure, frequently for patriotic reasons, sometimes for commercial goals, but other motives are present as well. Vernacular music is the music of the working class, frequently referred to as "folk music." Most of the examples of vernacular music are what we now refer to as early country and blues music, and most came out of the South. The perceptions we now have of the rural South as the musical heart and soul of the United States did not emerge overnight: they were crafted, predominantly during the first thirty years of the twentieth century by settlement school teachers, folklorists. English professors, artist and repertoire (A&R) men, radio talent scouts, furniture store owners, and countless musicians, who felt, for differing reasons, that the ballads, spirituals, blues and "hillbilly" music epitomized rural and working class America.


identifier: Burke, Anne Michelle <https://research.library.mun.ca/view/creator_az/Burke=3AAnne_Michelle=3A=3A.html>   (2002) Using the art in picture books to develop character in dramatic role-play.  Masters thesis, Memorial University of Newfoundland.

abstract: This study considers how the illustrator's use of the artistic elements of design in picture book illustrations helps adolescents to portray a character's thoughts, emotions, and attitudes in dramatic role-play. The picture book, with its new diversity of subjects and genres, has now widened its audience to include adolescents. The study of the illustrators use of the artistic elements of design in embellishing the narrative of the story allows students to gain a greater understanding of the aesthetic value of picture books. This understanding and interpretation of the illustrator's choices of artistic elements of design may help students to increase their visual literacy. The researcher chose a qualitative research design for descriptive evidence of whether artistic elements of design could help in portrayal of character. From a high school population of 75 ranging in age from 15 to 18 years, the participants were 18 students, 10 females and 8 males. Data were collected on students' participation in group discussions, monologues, dramatic role- plays, and reflective journal writing. The researcher concludes that participants used the illustrator's artistic elements of design to portray a character in dramatic role-play. The researcher recommends the use of the historical picture book in the secondary classroom in the present and further research in the future.


identifier: Dico, Awel Seid <https://research.library.mun.ca/view/creator_az/Dico=3AAwel_Seid=3A=3A.html>   (1998) A ²H-NMR study of interactions in model membranes containing pulmonary surfactant proteins SP-B and SP-C.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract: Pulmonary surfactant is a lipid/protein mixture which reduces the work of breathing by rapidly spreading into a monolayer at the alveolar air/water interface.  ²H NMR was used to examine the effect of porcine pulmonary surfactant protein SP-B and SP-C on lipid phase behaviour, chain order, and dynamics in bilayers of chain-perdeuterated dipalmitoylphosphatidylglycerol (DPPG-d₆₂) or mixed bilayers containing 70 mol % di- palmitoylphosphatidylcholine (DPPC) and 30 mol % DPPG with one or the other lipid labeled.  While SP-B was found to have little effect on chain order, deuteron transverse relaxation was strongly affected by the presence of the protein in both the liquid crystal and gel phases of each lipid system.  Perturbation of the bilayer by SP-B was insensitive to the relative amounts of DPPC and DPPG present.  There was no indication of a preferential interaction of SP-B with either lipid component.  These observation may constrain possible models for SP-B/phospholipid interaction in bilayer precursors of the pulmonary surfactant monolayer. SP-C was found to have a similar effect on the chain order and phase behaviour of DPPC and DPPG in bilayers with a single lipid component.  In gel phase DPPC/DPPG (70:30 w/w) bilayers with one or the other lipid component chain-perdeuterated, SP-C was found to affect the first spectral moment more strongly for DPPG than for DPPC.  This may indicate that SP-C induced a non-random lateral distribution in the mixed lipid bilayer.  SP-C was also found to influence motions responsible for deuteron transverse relaxation in both the gel and liquid crystalline phases. The presence of 5 mM Ca²⁺ in the aqueous phase substantially altered the effect of SP-C on the acyl chains' orientational order and transverse relaxation in the bilayer.  In the presence of Ca²⁺, SP-C was found to have no or little effect on the transverse relaxation and chain order in the gel phase of DPPC/DPPG (70:30 w/w) mixed bilayers.  This removal of the effect of SP-C on gel phase may reflect a Ca²⁺-induced partial separation of bilayer components at the phase transition.  The effect of SP-B on the DPPC head group was also studied.  It was found that the effect of SP-B on the head group region is concentration dependent.  Increasing SP-B concentration induced motional asymmetry in both head group and acyl chains region.  This was indicated by the highly asymmetric ²H-NMR spectra observed for both head group deuterated DPPC (DPPC-d₄) and chain perdeuterated DPPC (DPPC-d₆₂).  The results suggest that SP-B interacts with the bilayer in two different ways.  One mode of interaction is primarily at the head group region while the other affects motions of whole molecule and is seen in our experiments only at high SP-B concentration.


identifier: Reddy, Madhuri <https://research.library.mun.ca/view/creator_az/Reddy=3AMadhuri=3A=3A.html>   (2002) A proposal to restructure the long-term care sector in the St. John's region of Newfoundland and Labrador.  Masters thesis, Memorial University of Newfoundland.

abstract: There is a concern that there is a mismatch between the needs of the elderly and the level of care provided in long-term care (LTC) facilities. In 1991, the number of LTC beds per 1000 people over the age of 75 years in NF was the highest in Canada. Alternatives to institutional placement would be preferable for a multitude of reasons, including social, medical, and financial. The absence of data concerning the mismatch makes it premature to recommend plans for restructuring. A descriptive profile of residents of LTC facilities can help provide a foundation for current and future program planning. Describing the characteristics of the current and potential residents of LTC facilities provides a basis for confirming needs, identifying developmental priorities, establishing program objectives, and evaluating program outcomes. -- The primary objective of this study is to assess the care requirements of institutional LTC residents in the St. John's Region and to determine actual and optimal population rates for institutional care. The LTC needs in the St. John's region were studied. All clients seeking placement in the institutional LTC sector for the year February 20/1995 through February 20/1996 were prospectively followed. Data on degree of disability for these clients was obtained prior to placement in LTC and at intervals following placement. -- Mortality data on this incident cohort was collected following acceptance for placement in LTC as well as at yearly intervals after initial placement. Using this information as well as a search of the medical literature, the natural history of LTC residents was determined. A more accurate estimate for demand for LTC beds assuming an efficient system using an appropriate number of appropriate beds) was ascertained. A Decision Algorithm was developed, incorporating two objective, validated tools for assessing the need for professional nursing care (RUG-III) and client disability (ARCS). The current needs and level of care of the inception cohort were assessed and compared with objective placement criteria as defined by the Decision Algorithm. By determining the natural history of LTC clients and incorporating predicted demographic trends, predictions for the number of LTC beds required in 2007 was determined. -- 36% of clients accepted for institutional LTC had no objective measurable disability as determined by RUG-III and probably do not require the resources of a NH. 43% of residents were found to have a moderate level of impairment, but 63% of these clients have cognitive impairment as their major reason for seeking LTC. If present methods of placement are continued, there will be a large deficit in SC beds by 2007. If objective criteria (Decision Algorithm) are used to determine appropriate placement and no alternative facilities to NH or SC are available, the deficit in NH will be decreased by 50%. If special facilities for the cognitively impaired are available, there will indeed be a surplus of NH beds. -- Suggestions for change to the LTC sector in the St. John's Region are presented. A true single-entry system should exist and there should be consistency of assessors in determining placement into institutional LTC. Objective criteria should be used to determine appropriateness of placement, clients should be re-evaluated after placement and facilities should be case-mix funded. Alternatives to NH and SC should be available, especially for the cognitively impaired. This information can help provide a foundation for current and future program planning of LTC facilities.


identifier: Smith, Tina M. <https://research.library.mun.ca/view/creator_az/Smith=3ATina_M=2E=3A=3A.html>   (2002) Using manipulatives with fractions, decimals, integers, and algebra : a guide for the intermediate teacher.  Masters thesis, Memorial University of Newfoundland.

abstract: Research in recent years has shown that traditional methods of instruction being employed in many intermediate classrooms today are clearly lacking. The National Council of Teachers of Mathematics (NCTM) states that learning mathematics without understanding has long been a common outcome of school mathematics instruction (NCTM. 2000. p. 19). According to cognitive learning theorists, true learning involves moving from the concrete to the abstract. These concrete representations, or manipulatives, contribute to the development of well- grounded, interconnected understandings of mathematical ideas (Stein and Bovalino. 2001). As such, the NCTM and the Atlantic Provinces Education Foundation (APEF) have incorporated them into recent mathematics reform at the intermediate level. -- The new intermediate mathematics curriculum calls for the regular use of manipulatives by teachers and students (APEF, 1999). This, however, causes problems for the teacher who is unsure of how to use them. Educational methods courses which focus on the use of manipulatives have been restricted to primary and elementary levels. This reinforces the idea that manipulatives are intended only for lower grade instruction. -- This paper will address these issues in light of the new APEF curriculum for intermediate mathematics, culminating with a resource for teachers. This guide is intended to facilitate the efficacious integration of manipulatives into the teaching of fractions, decimals, integers, and algebra at the intermediate level.


identifier: Smith Rideout, Lesley <https://research.library.mun.ca/view/creator_az/Smith_Rideout=3ALesley=3A=3A.html>   (2002) A cross-comparison of fundraising initiatives and perceptions in urban high schools.  Masters thesis, Memorial University of Newfoundland.

abstract: The purpose of this research was to determine and describe the initiatives and perceptions of fundraising in urban high schools. The questions explored were: (1) What are the feelings of educators about school based fundraising? (2) Have these perceptions changed in recent years? Do they feel the necessity for fundraising changing (i.e. increasing, decreasing, constant)? (3) How do school administrators view their role in local fundraising? How do they view teachers' roles? What are the parents' roles? (4) In what types of fundraising activities do schools participate? (5) Do high schools in urban areas participate in alternate forms of fundraising, such as business partnerships and charities? (6) How are the locally generated funds spent at the schools? (7) What policies are available to guide schools in raising local funds? -- A case study of two urban high schools was conducted to  determine types of activities, amounts raised, the distribution of funds, school administrative, teacher and parent roles, and identification of school board and/or internal school policies on generating private resources at the school level. The principals of the schools were interviewed with open-ended questions and they responded to a written questionnaire. These findings were then analyzed in two stages (1) within-case analysis and (2) cross-case analysis. -- The findings are: (1) principals would not participate in fundraising  if it were not necessary. However, in reality, schools have to fundraise to operate. (2) High schools  collect  fees/donations at the beginning of the school year to offset costs of operation. In addition to school fees, teams, band students and special interest groups are expected to assist in the cost of competitions, travel and equipment and hold most of the actual fundraising initiatives. (2) The level of demand for fundraising has remained constant over the years. (3) Principals view their role as important in the success of fundraising in their schools. School councils are an integral part in the approval, support and promotion of fundraising in schools. Parents are heavily relied upon in schools if fundraising initiatives are going to be successful. (4) There is no current, formal policy at the school and/or school board level on fundraising. Long-range planning for fundraising is not a fully developed concept within the schools. (5) Generally, schools are encouraged to access grant money to enhance programming.


identifier: Li, Bing <https://research.library.mun.ca/view/creator_az/Li=3ABing=3A=3A.html>   (2002) A preliminary report on an integrin-like protein in protoplasts of the entomopathogenic fungus Entomophaga aulicae.  Masters thesis, Memorial University of Newfoundland.

abstract: Integrins are transmembrane proteins involved in cell adhesion and signal transduction. This study reports findings on a possible integrin-like protein in an entomopathogenic fungus, Entomophaga aulicae. -- Extracts of Entomophaga aulicae protoplasts  contained a 71 kDa protein which cross-reacted with antiserum raised against a β₁-chicken-integrin. The  inclusion of DTT in the cell extracts had no effect on the mobility of this protein indicating the lack of a significant number of sulfur-sulfur bonds. A combination of eight protease inhibitors was necessary to prevent protein degradation in order to obtain consistent results. Positive and negative controls supported these results. -- Using immunofluorescence microscopy, similar patterns of abundant peripheral patches of staining were detected at the periphery of the protoplast when probed with four different anti-integrin or anti-β-integrin like protein antibodies. Controls showed that staining of the periphery of the nucleus and staining of the nuclear "core" were non-specific. This conclusion is tentative however since we were unable to show characteristic integrin staining in positive controls of monkey kidney fibroblasts. -- In cell adhesion assays, there was no evidence to support the hypothesis that E. aulicae protoplasts attach to either a host insect cell line, or to the integrin-binding proteins, fibronectin and collagen. Future experiments using newly isolated protoplasts and cell lines derived from insect fat body may be more instructive. -- We conclude that while we have preliminary evidence for an integrin-like protein in E. aulicae, strong support for integrin in any fungus remains elusive.


identifier: He, Ling <https://research.library.mun.ca/view/creator_az/He=3ALing=3A=3A.html>   (2001) Teaching English as second language (ESL) writing.  Masters thesis, Memorial University of Newfoundland.

abstract: This thesis has no abstract


identifier: Pottle, Robert Arthur <https://research.library.mun.ca/view/creator_az/Pottle=3ARobert_Arthur=3A=3A.html>   (1978) A field study of territorial and reproductive behaviour of the cunner, Tautogolabrus adspersus, in Conception Bay, Newfoundland.  Masters thesis, Memorial University of Newfoundland.

abstract: Territorial and reproductive behavior in the cunner, Tautoglabrus adspersus ( Walbaum ), were observed in Conception Bay, Newfoundland.  Cunners are active from May until November and spend the winter months in a state of torpor in the substrate.   Males more than 6 years old establish territories in early June.  Territories are defended outside the mid-summer spawning season.   Both territorial arid nonterritorial males of >150 mm TL acquire nuptial colouration between emergence from overwintering torpor and the start of the spawning season. Nonterritorial  males are vigorously excluded from territories by the resident males and appear to contribute little to the reproductive effort of the population. Territorial females are found in the peripheral areas of some males’ territories and-exhibit aggressive behavior toward other's females. Both territorial and nonterritorial females pair spawn with territorial, males. Fish of both sexes are capable of multiple spawns.  Group spawning by nonterritorial  cunners was not observed. The function of territory defense in T. adspersus is discussed.


identifier: Hargono, Bambang <https://research.library.mun.ca/view/creator_az/Hargono=3ABambang=3A=3A.html>   (1992) Water reservoir impact assessment in Indonesia : the environmental impact assessment process and the use of remotely sensed data.  Masters thesis, Memorial University of Newfoundland.

abstract: Water resources developments in Indonesia is under the full authority of the government. All  proponents for this type of development arc government agencies. These developments are  designed primarily for irrigation and are implemented mainly to alleviate socio-economic problems in society. However, water resources developments create serious socio-economic problems related to the relocation of people, because of the high population density of the country. -- Due to the urgent fulfilment of the population demands,  the developments will have to continue, but with special emphasis on minimizing the environmental  impacts. This needs an environmental impact assessment (EIA) to be applied properly and monitoring of the environment to be carried out effectively. This thesis examines some shortcomings in the Indonesian EIA process and the role of public participation in the objective assessment of concerns regarding these developments. The thesis also examines how remotely sensed data can be used for water reservoir impact assessment and monitoring. -- The Indonesian EIA process has some shortcomings when compared to other EIA processes, in that the entire process is a self assessment within the initiating department. When the proponent is a private company, the reviewer in the initiating (government) department can act as an independent party between the proponent and the public. When the proponent is a government agency, there is an opportunity for the reviewer towards a self-interested bias. Other problems have involved people's protests against water resources developments which resulted from inadequate opportunity for public input into the EIA process. -- A ground receiving station for satellite remotely sensed data is in existence in Indonesia. This station is able to receive and process LANDSAT MULTISPECTRAL SCANNER (MSS) and LANDSAT THEMATIC MAPPER (TM) data. However, few specialists in the field of water resource development in Indonesia utilize these data in their work. This thesis explores the use of remotely sensed data for the environmental impact assessment and monitoring of water resources developments particularly in reservoir impoundment projects. The proposed Lower Churchill River hydro-electric development project in Labrador, Canada, is used here for illustration of the use of remotely sensed data for an environmental impart assessment. This thesis examines the possible application of these remote sensing techniques in a water resource project in the South Kedu area in Central Java, Indonesia.


identifier: Muste, Traian Gheorghe <https://research.library.mun.ca/view/creator_az/Muste=3ATraian_Gheorghe=3A=3A.html>   (1988) Studies on steel fibre reinforced light weight aggregate concrete subjected to cold ocean environment.  Masters thesis, Memorial University of Newfoundland.

abstract: The present research, triggered by the potential development of offshore oil exploitation off Newfoundland coast, concludes a part of a research programme, at Memorial University, St. John's, Nfld, Canada, in which the use of lightweight aggregate concrete (LAC) and steel fibres reinforced lightweight aggregate concrete (SFRLAC) as structural materials for potential Arcticand sub-Arctic structures was investigated. The work was financed from NSERC Grant # 31176. -- The thesis starts with the literature review and introduction in Chapter 1, and consists of two main parts. The first one, Chapters 2 and 3, presents a few relevant rheological and hardened state properties of lightweight aggregate concrete (LAC) and steel fibre reinforced lightweight aggregate concrete (SFRLAC); also in Chapter 2, the composition of concrete was determined to meet the specifications, and steel fibres were added by a trial-and-error method to obtain the most suitable SFRLAC. The second part, Chapters 4 to 6, includes the results of the theoretical and experimental analysis of the behaviour of the LAC and SFRLAC plates subjected to static loading. In Chapter 4, the design of the plates, based on the available semi-empirical methods is presented; in addition, a finite element computer code used in this work is introduced, and its predictions are compared with the experimental results in Chapter 6. The laboratory experimental work is presented in Chapters 2, 3, 5 and 6. -- The behaviour of the plates with regard to deformation, strain, cracking pattern, ultimate capacity, and modes of failure is given in Chapter 6; the effect of varying the shear and flexural reinforcement on the behaviour of the plates was also investigated. The comparison of theoretical predictions, as described in Chapter 4, using the actual properties of the concrete and reinforcement, with the experimental results is also given. -- Throughout the thesis, one main purpose was to assess the suitability of the LAC and SFRLAC to cold ocean environment (COE), simulated under laboratory conditions. Another main purpose of the work was to assess the shear capacity of the plates, and to improve it. The shear capacity is calculated, as presented in Chapters 4 and 6, according to conventional and modified conventional reinforced concrete theory. The fibres contribution to the behaviour of the plates was also investigated. -- It is concluded in Chapter 7, that LAC, and especially SFRLAC, are suitable structural materials for Arctic and sub-Arctic offshore structures, possessing suitable structural behaviour.


identifier: Blair, Andrew Muhenda Abooki Nyakaana <https://research.library.mun.ca/view/creator_az/Blair=3AAndrew_Muhenda_Abooki_Nyakaana=3A=3A.html>   (1990) A rational method for the treatment of escalation in construction costs.  Masters thesis, Memorial University of Newfoundland.

abstract: Escalation of construction costs constitute a substantial part of the total costs of many construction projects. Drastically changing escalation rates can have adverse effects on the success of such projects. The main objective of this thesis is to examines construction cost escalation and recommend suitable analytical techniques to quantify its impact. -- The causes of escalation are examined. Many of these causes are found to be unpredictable by their very nature. As such the main effect of escalation is to cause risk and uncertainty regarding a project's cost. -- Methods of assessing the amounts allowed in construction contracts to cover escalation are reviewed. It is established that these amounts ran best be assessed using the concept of expected utility value. Based on this concept, financially stable contractors will include larger monetary sums to cover cost escalation risk than a large owner, like government, would be willing to pay for the same risk. -- Forecasts of the amount of escalation are required for budgetary and bidding purposes. These forecasts may be obtained by forecasting cost indices that measure the escalation rate and applying this rate to the estimated cash flow. Methods of forecasting construction cost indices using time series analysis are examined. The theories underlying these methods are outlined. The application of these methods using a computer software package is illustrated. -- Methods of using the forecasted indices are reviewed. Parsimony is found to dictate use of cost flow models based on polynomial regression. The use of such cost flow models is demonstrated. -- None of the available forecasting techniques are found to provide a panacea for obviating the effect of construction cost escalation. The effect of escalation can be minimized by carefully allocating the risk of escalation using escalation clauses. Guidelines for the use of escalation clauses are stipulated. It is concluded that except for than in short construction projects to be built under stable conditions, the risk of escalation should be borne by the owner. -- Various types of escalation clauses are reviewed. Use of escalation clauses incorporating a formula based on indices is recommended. It is also recommended that regularly published indices should be maintained to provide for construction cost escalation and for use in other estimating situations.


identifier: Yu, Yongfei <https://research.library.mun.ca/view/creator_az/Yu=3AYongfei=3A=3A.html>   (1998) Synthesis, structure and properties of some chiral-at-metal transition metal organometallics.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract: Although chirality can arise in various guises in organometallic systems, metal centered chirality has become an ever growing concern due to its potential high efficiency in asymmetric synthesis. This thesis focuses on the synthesis, structure and properties of some chiral-at-metal transition metal organometallics. -- Reactions of CpCo(X)(Y)(I) (X=(S)-Ph₂PNHCH(Me)Ph, Y=I, CF₃; XY=PhCH(Me)-N=CH-C₄H₃N) with Et₂NP(OMe)₂ toward diastereoselective synthesis of novel Co- and P-chiral amidophosphonate Co(III) complexes were studied by a combination of ¹H, ¹³C, ¹⁹F, ³¹P NMR, proton NOED, CD spectroscopy and single crystal X-ray diffraction in order to rationalize the Co*-P chiral induction and to establish the solid-state structure, configuration and solid-state/solution conformations. The results show that chemical outcome varies from one system to another. -- Study on reaction of a series of resolved chiral aminophosphine Co(III) complexes (CpCo(I)(P(0)(R)(OMe))(Ph₂NHCH(Me)Ph)) with gaseous HCl shows that the reaction affords regioselective P-N bond cleavage products with retention of configuration at Co* and establishes a convenient method to obtain homochiral transition metal complexes.  The regioselectivity was discussed based on EHMO calculations. ¹H NMR evidence for the formation of isobutene, resulting from P-C bond activation via β-elimination in a diastereoselctive, Arbuzov dealkylation reaction involving dimethyl t-butylphosphite, was found. -- A series of new chiral-at-metal and non-chiral titanocene derivatives with general formula Cp(C₅R₅)Ti(X)(Ar) (R=Me, X=Cl, Ar=C₆F₅, o-FC₆H₄; R=H, X=Cl, Ar=C₆F₅, o-FC₆H₄; R=H, X=Ar=C₆F₅, o-FC₆H₄) was synthesized and characterized. The barrier of aryl rotation around Ti-Cipso and the possibility of coordination of ortho-F to Ti were examined by variable temperature NMR, MMX and EHMO methods, as well as solid state single crystal X-ray diffraction.


identifier: McDavid, Sara Jodi <https://research.library.mun.ca/view/creator_az/McDavid=3ASara_Jodi=3A=3A.html>   (2002) "We're dirty sons of bitches": residence rites of passage at a small maritime university.  Masters thesis, Memorial University of Newfoundland.

abstract: Drawing on recent folklore studies on contemporary rites of passage, this thesis examines the customs and rituals of a formerly all male university residence at a small university in Atlantic Canada. Factors including the recent addition of women to the residence and the increased role of the university administration in orientation events are examined. Based on interviews and participant observation the author examines orientation or "frosh" week activities and an annual celebration at the end of the academic year, using the paradigm set up by van Gennep of separation, transition and incorporation. The transitional stage is an integral learning stage in which the first year students are exposed to student culture, and are taught the correct behaviour for their new roles through festival, song, foodways, costume, and legend. The author proposes that elements of the transitional stage last throughout the year, and therefore suggests that residence life is an "ongoing rite of passage."


identifier: Oldford, Rhona G. <https://research.library.mun.ca/view/creator_az/Oldford=3ARhona_G=2E=3A=3A.html>   (1998) Teaching and learning with technology : an integrated approach.  Masters thesis, Memorial University of Newfoundland.

abstract: This report summarizes the program of study done to complete a graduate internship in the field of Teaching and Learning. The theme of the report is the integration of technology within and across the curriculum particularly with respect to the role of the Learning Resource Teacher.   This document consists of three components: the first, a theoretical framework providing the foundation for practical application, the second, a critical reflective analysis of the internship, and the third, a reflective analysis of specific internship projects. -- The theoretical framework explores the literature related to the role of technology in society and education. It summarizes current thinking on the appropriate application of technology and integration strategies. The implications of current learning theory and curriculum perspectives are discussed as well as the problems of initiating change in a conservative educational system. -- The critical reflective analysis component includes a description of the school and its current status with respect to technology, but focuses on the experiences of the internship that contributed to the development of an in depth understanding of the realities of the role of the Learning Resource Teacher.   Particular emphasis is placed on the projects and strategies for integrating technology. -- The final component of the report includes a description and critical reflective analysis of two specific projects: the first involved the development of a primary and elementary information skills continuum incorporating the technology outcomes identified in current curriculum guidebooks; the second involves using a Stellar School Project, ISLE-Net, to integrate technology within and across the curriculum. It outlines the planning and preparation procedures followed, a description and analysis of the implementation process, recommendations for the further development of the ISLE-Net project, and a discussion of its implications for future projects.


identifier: Tucker, Craig <https://research.library.mun.ca/view/creator_az/Tucker=3ACraig=3A=3A.html>   (1999) Where do we go from here? : the aspirations and expectations of the graduating class in a rural island high schoo l- science curriculum, information technologies, parental, community, and other factors of influence.  Masters thesis, Memorial University of Newfoundland.

abstract: This research was carried out to gain an understanding of the educational and career aspirations and expectations of students in the graduating class from a rural school on a remote island off the coast of Newfoundland, Canada. A number of variables, affecting aspirations and expectations, were examined. These included: the number and type of science courses taken; the marks in these courses; the use of the internet and other information technologies to gain career information: parental occupation and level of education; student use of teachers and guidance counsellors as career resources: and the role of family in aiding students. -- To measure the aspirational level of aspired-to careers, as well as expected careers, two scales were used. The General Educational Development Scale (GED) and the Specific Vocational Preparation Scale (SVP) are both subscales of the Canadian Classification and Dictionary of Occupations (CCDO). For career aspirations, relatively high levels of aspiration were found for both GED and SVP values. These values were lower for career expectations. Positive Spearman's rho correlations were found between GED and SVP levels for career aspirations and career expectations. -- Significant Spearman's rho correlations were found between the GED and SVP levels for career aspirations and expectations, attainment in certain science courses, as well as attainment in academic science courses. A negative correlation was found for nonacademic courses. -- Findings indicated that there were no other factors that had statistically significant correlations with levels of career aspirations and expectations.   However, a number of other trends were found in the data. -- Recommendations based on these findings include ways by which rural students may be exposed to various non-local career options. They also include suggestions for improved guidance services in student career planning.


identifier: Davidson, Fraser J.M. <https://research.library.mun.ca/view/creator_az/Davidson=3AFraser_J=2EM=2E=3A=3A.html>   (1999) Wind driven circulation in Trinity and Conception Bays.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract: In this thesis the wind driven circulation of Trinity and Conception Bays is described. I make use of three numerical models, ranging from a linear, single-layer, reduced-gravity model to the 3-D eddy resolving CAXDIE model. The CAXDIE model is verified by applying it to a lake initially at rest with horizontally uniform stratification, a parabolic bottom profile, adiabatic boundary conditions and no external forcing of any kind. Over time, vertical mixing of the thermocline gives rise to horizontal density gradients and cyclonic circulation in the lake. The models are then applied to investigate mechanisms that lead to observed asymmetry in the response of Trinity and Conception Bays to steady wind forcing directed out of the bay.  I investigate the influence of factors such as continuous stratification, vertical mixing, nonlinearity and realistic bottom topography. Adding non-linearity allows for significant cross-bay transport of upwelled water and leads to an along-bay pattern of the surface isotherms evident in observations, and can also lead to the separation of the coastal jet from the upwelling favourable shore. The response to variable wind is also investigated and the modelling effort is compared to available oceanographic observations of the two bays including ADCP, current meter moorings, thermistor chains. SST and CODAR data. Overall I find reasonable to good agreement with the data. Adding the non-linear terms to the CAXDIE model improves the reproduction of observed thermocline movement. An application to particle advection is undertaken, which suggests that there may be little exchange of fish larvae between Trinity and Conception Bays.


identifier: Ashram, Muhammad <https://research.library.mun.ca/view/creator_az/Ashram=3AMuhammad=3A=3A.html>   (1997) Synthesis of calix[4]naphthalenes and their properties.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract: The calixarenes 2-4 are well-known and well-studied cyclic oligomers formed by the base-induced condensation of formaldehyde with p-tert-butylphenol. They are potentially a very versatile class of host molecules. -- This thesis describes the syntheses and some properties of the calixnaphthalenes, which are a new class of cyclic formaldehyde-naphthol tetramers which are analogous with the calixarenes. These calixnaphthalenes were prepared by either one-pot or convergent procedures. -- Calixnaphthalenes offer some advantages over the calixarenes.  For example, since the naphthalene unit is larger than benzene the cavity of cone conformations of the corresponding calixnaphthalenes should be deeper. Also, the presence of a B ring in naphthalene provides a site for the addition of different functional groups, which allow calixnaphthalenes to be modified. Furthermore, due to the low symmetry of 1–naphthol and 3-hydroxy-2-naphthoic acid, some calixnaphthalenes can be inherently chiral. They therefore have potential applications as chiral hosts, or chiral ligands. -- Calix[4]naphthalenes 10-12 were synthesized first by the direct condensation of 1-naphthol and formaldehyde under basic conditions. Due to the difficulty in the separationand purification of these compounds, a convergent approach was used to synthesize these compounds as well as 13 in larger amounts for further investigations. The calix[4]-naphthalenes are conformationally flexible at room temperature even after their derivatization as tetraester derivatives. -- In order to synthesize calixnaphthalenes which are closer to calixarenes in the location of the hydroxyl groups within the lower rim of the calixnaphthalene basket, a retrosynthetic analysis of compounds 57 and 62 showed that 3-hydroxy-2-naphthoic acid (9) would be a suitable starting material. Syntheses of compounds 57 and 62 were effected by self-condensation reactions of 3-(hydroxymethyl)-2-naphthol and 6-tert-butyl-3-(hydroxymethyl)-2-naphthol, respectively, using TiCl4/dioxane conditions. -- Variable temperature ¹H NMR analyses showed that compounds 57 and 62 are conformationally flexible at room temperature, but the methylene protons are split into doublets at -10°C and the molecules are locked in the cone conformation as its preferred conformation at -20°C. X-ray analysis showed that in the solid state 57 adopted a pinched-cone conformation. -- In order to modify calixnaphthalenes 57 and 62, they were converted into their ester derivatives by reaction with ethyl bromoacetate. Calix[4]naphthalene 57 produced two tetraester derivatives in the cone and partial-cone conformations, 70b and 70a, respectively. Calix[4]naphthalene 62 produced mono- and diester derivatives 62a and 62b, respectively. ¹H NMR and molecular modeling analyses revealed that 62b exists preferrentally in the 1,3-alternate conformation. -- Using a modified oxidation procedure, the hydroxyl groups of 57 and 62 were oxidized to produce bis(spirodienone) derivatives. Compound 57 afforded only one somer, 78, having C2 symmetry as revealed by NOED experiments and confirmed by x- ray analysis. Compound 62 produced two isomers, 81 and 80, having C, and C2 symmetries, respectively. Mild oxidation of 62 produced one monospirodienone isomer. -- Dithiadihomocalix[4]naphthalenes 82 and 83 were synthesized from l-naphthol and 3-hydroxy-2-naphthoic acid using procedures commonly employed in cyclophane chemistry. These compounds are found to be conformationally flexible at room temperature. Photolytic sulfur extrusion of 83 produced the corresponding dihomocalix[4]naphthalene 83a while such conditions employed with 82 did not produce the corresponding 82a. -- In order to enlarge the annulus of calix[4]naphthalenes derived from 3-hydroxy-2- naphthoic acid, approaches to the tetrahomocalix[4]naphthalene isomers 85a and 91a-93a were attempted. The synthetic approach employed was the base-mediated coupling of 97 and 98 to produce, in principle, tetrathianaphthalenophanes 91-94, which are potential precursors of the corresponding tetrahomocalix[4]naphthalenes after sulfur extrusion. Instead, four isomeric dithianaphthalenophanes 99-102 were produced from the above coupling reaction. Photolysis of these dimers produced two isomeric tetrahydrodibenzo-pyrenes, 107 and 108, instead of [2.2](l,3)naphthalenophanes, 111 and 112. This type of sulfur extrusion with concomitant transannular cyclization appears to be general one, which could offer some advantages for the synthesis of tetrahydropyrenes and tetrahydrodibenzopyrenes.


identifier: Jensen, Stefan P. T. (Stefan Peter Thomas) <https://research.library.mun.ca/view/creator_az/Jensen=3AStefan_P=2E_T=2E_=28Stefan_Peter_Thomas=29=3A=3A.html>   (2002) A history of Memorial University students, 1949-1961.  Masters thesis, Memorial University of Newfoundland.

abstract: Memorial University of Newfoundland, Newfoundland's seat of higher learning, was a dynamic institution filled with students eager to reap the benefits of a university education. While the history of universities in Canada is a much studied subject, the students who attended those universities are noticeably understudied. Students were by far the largest single group on any campus and were the recipients of each innovation and programme offered or designed by a university. Students' participation in the life of the university is the central focus of this thesis. This thesis examines the history of students ranging from while on the Parade Street Campus in 1949, through the granting of university status to Memorial University College, to 1961 when the university moved from downtown St. John's to the spacious Elizabeth Avenue Campus. Memorial's students during this period were active participants in the life of the university, as well as being active off campus.


identifier: Parsons, Wade William <https://research.library.mun.ca/view/creator_az/Parsons=3AWade_William=3A=3A.html>   (1999) Waveform relaxation methods for Volterra integro-differential equations.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract: This thesis is concerned with the solution of systems Volterra integro-differential equations by the application of waveform relaxation methods. This is a timely topic since such methods can often be implemented efficiently on parallel architectures. It derives convergence results for both the regular kernel and the weakly singular kernel cases, and although our primary concern is with numerical methods, we consider both analytic and numerical solutions. -- In Chapter 1 we study the history of waveform relaxation methods and try to bring the reader up to date with what is presently known about these methods. We emphasize their application to the solution of systems of ordinary differential equations and Volterra integral equations. In each case, we consider both the continuous- time and discrete-time methods and give convergence results for each. Therefore, this chapter will set the stage for the application of waveform relaxation techniques to the solution of Volterra integro-differential equations in Chapter 2. -- Chapter 2 is the main chapter of the thesis and contains all of the original results from my research. It begins by giving the standard resolvent representation of the analytic solution of Volterra integro-differential equations, with both regular kernels and weakly singular kernels. It then considers continuous-time iteration waveform relaxation methods, in which we assume that the resulting equations can be solved exactly. We prove that these methods converge uniformly on all bounded intervals. -- However, the main body of results in this chapter, concern the collocation solution of the iterates that result when waveform relaxation methods are applied to Volterra integro-differential equations.   We will consider convergence, both as the steplength tends to zero and as the number of iterations tend to infinity. We study the effect various iterative methods used to solve the resulting implicit nonlinear algebraic equations have on the convergence and complete the discretization by taking into account the use of quadrature to solve the integrals in the method. Throughout the chapter we include numerical examples which illustrate the various theorems, with tables of results and discussion placed in a section at the end of this chapter. -- In Chapter 3, we point out that a major source of applications of Volterra integro- differential equations are the Volterra partial integro-differential equations. We also mention topics not considered in the main body of the thesis. These include numerical stability of Volterra integro-differential equations, and the use of graded meshes for the solution of Volterra integro-differential equations, with weakly singular kernels.


identifier: Pearce, Gregory D. <https://research.library.mun.ca/view/creator_az/Pearce=3AGregory_D=2E=3A=3A.html>   (1998) Student perspectives on the nature of pre-university career support : an urban/rural comparison.  Masters thesis, Memorial University of Newfoundland.

abstract: This study was designed to explore and compare the career related needs of rural and urban youth upon entering a post-secondary institution. Subjects were 101 university students who had completed at least their first year of university study. Subjects were asked to complete a questionnaire developed from a list of perceived career related needs identified in a study by Jeffery and Lehr (1993). While few significant urban/rural differences were found, a number of unexpected outcomes related to the career preparedness of all youth were noted. In addition, several areas needing further study are discussed.


identifier: Maich, Kimberly <https://research.library.mun.ca/view/creator_az/Maich=3AKimberly=3A=3A.html>   (2002) When pathways cross : special education teacher collaboration under Pathways to programming and graduation.  Masters thesis, Memorial University of Newfoundland.

abstract: This qualitative research falls into the special education context of inclusion and a new provincial policy model for special education entitled Pathways to Programming and Graduation. It examined the reported day-to-day collaboration between seven special education teachers, the participants, and classroom teachers, in one school district of Newfoundland and Labrador, Canada. Each participant completed an interview and a reflective journal. This study found that participants usually pulled students out of the classroom for special education services, and typically collaborated by talking together, rather than by more direct means, such as teaching together. Three major themes emphasized by the special education teachers emerged in this research. First, the participants often felt isolated, primarily from the typical classroom environment, but also from a lack of professional collegiality. Second, the participants experienced both constraints on their time to collaborate, as well as elaborating on how they spend their collaboration time. Third, they noted issues of power, related to role boundaries with the classroom teachers, directives from supervisory bodies, and special education teacher knowledge. The special education teachers tended to view ideal collaboration as including planned collaboration time during the instructional day, professional inservicing related to collaboration, and training that focuses on interpersonal skills.


identifier: Cooper, David <https://research.library.mun.ca/view/creator_az/Cooper=3ADavid=3A=3A.html>   (1983) A counselling internship undertaken in Harlow, England including a research component comparing the moral judgement of rural and urban British schoolchildren.  Masters thesis, Memorial University of Newfoundland.

abstract: This report concerns a counselling internship undertaken in Harlow, England, from May 2, 1980 to July 11, 1980. The purpose of this internship was to allow the intern a chance to practice and refine, previously learned counselling skills in a supervised setting. – The internship provided the intern with a chance to work in a British comprehensive school, and thus compare the role of the school counselor there, with that of Newfoundland. He also examined a variety of community services which the school relies upon engaged in the counselling activities of the school, increased his ability in methods of student evaluation, and audited a course in special education. In addition to this the intern also carried out a comprehensive research project. – The research project involved a comparison of the moral judgement levels of rural and urban British school children. It was hypothesized that rural students would score lower than urban students on two measures of moral judgement. This hypothesis, however, was not shown to be true. – Finally, suggestions were made for future research. A summary of the internship was given and some suggestions for future interns were made.


identifier: Yang, Xinfeng <https://research.library.mun.ca/view/creator_az/Yang=3AXinfeng=3A=3A.html>   (2001) Vibration based crack analysis and detection in beams using energy method.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract: The thesis presents a comprehensive investigation on vibrations of cracked beam structures and methodologies for crack identification. In order to determine the crack influence on structural dynamic characteristics correctly and efficiently, a vibration model for cracked beams is developed. The crack model assumes that the crack is always open during the dynamic response of the structure and considers the reduction of stiffness at the crack location; in addition it also includes the influence of stress relief around the crack region and its influence on the effective stiffness around the crack location. Computation of stiffness for the cracked beam is achieved through consideration of strain energy variation in the  structure, resulting from the occurrence of a crack. The model thus generates a continuous beam vibration equation (with varying moment of inertia), which could effectively incorporate the local changes of structural properties due to the crack. -- Using the model, vibration analyses of simply-supported and fixed-fixed solid rectangular beams, with one and two cracks, are carried out for computing natural frequencies and mode shapes. Changes of frequencies due to the crack are plotted considering crack size and/or crack location. It is shown that the natural frequencies would decrease as the crack size increases, and the decreases of frequencies would follow a wave-like pattern as the crack location changes. Comparisons are made with earlier results and some other experimental investigations, carried out for verifying some of these results, and shown to have a good agreement. -- Frequency contour procedure is developed for crack detection. Different combinations of crack sizes and locations would give different natural frequencies, and contour lines for the same normalized frequency (as that of the measured value of the corresponding mode) could be plotted. Frequency contours for different modes in a cracked structure (having values similar to the measured values) are plotted together, and the intersection point of all the contours provides the identification of the crack location and size. Analyses of a hollow beam model, representing a ship model, are also carried out. The beam model, with varying stiffness and mass, vibrates in water, generating added fluid mass of the ship model. Due to the eccentric nature of the added fluid mass and wave force excitation, both vertical bending vibration and coupled torsional-bending (horizontal) vibration are generated in the structure. Frequencies and mode shapes agree well with test results, obtained earlier in an experimental investigation. For a cracked backbone in the ship model, frequencies are obtained and plotted with crack size and crack location. The frequency contours are used to identify the crack size and location. -- To consider shear deformation and rotary inertia effect, the vibration analyses on Timoshenko beams, with/without a crack, are also carried out. The results are compared with that of Euler beams. -- Finally, forced vibration of cracked beams is considered. Frequency response, acceleration response and acceleration curvature response functions are obtained, and their changes due to a crack have been investigated. Acceleration curvature response and resonant acceleration amplitude procedures are found as suitable indicators to identify the crack.


identifier: Corcoran, Carolyn <https://research.library.mun.ca/view/creator_az/Corcoran=3ACarolyn=3A=3A.html>   (2000) A paper folio on the topic of learned helplessness.  Masters thesis, Memorial University of Newfoundland.

abstract: This thesis has no abstract


identifier: Hunter, Mark C. <https://research.library.mun.ca/view/creator_az/Hunter=3AMark_C=2E=3A=3A.html>   (1999) "... With the propriety and decorum which characterize the society of gentlemen": the United States Naval Academy and its youth, 1845-1861.  Masters thesis, Memorial University of Newfoundland.

abstract: This thesis is a social history of naval officer education at Annapolis, Maryland from 1845 to the outbreak of Civil War. Naval Academy historians have largely conducted administrative histories without looking too deeply at the students, their goals, or life at the institution. Even though the students were adolescents, no one has looked at the intersection of Academy and youth history, nor has anyone placed law and discipline there within this framework. This thesis will show that the establishment of the Naval School at Annapolis in 1845 represented a continuity with the older naval education system, but by 1849 reforms began which broke this continuity with the School's renaming to the Academy in 1850 and then the establishment of a four-year training program. The Academy showed a greater concern with the students as youths who needed a longer period of nurturing before going to sea. This was exemplified in 1851 with the establishment of the summer training cruises which provided the students with a safe environment for introduction to sea life. The Academy became a intermediate place where middle-class youths were introduced to naval life. -- This new Academy was more in tune with the middle-class view that adolescents should be raised in a safe transitional area, and it catered to youths just beginning life away from their parents, unlike the older youths of the School era. Youth historians have discovered that in this period middle-class youths went from learning the same trades as their fathers, often at home, to having more personal career choice. But in return the middle class wanted their children schooled for a future career in a controlled, structured environment which catered to them as "youths" rather than "adults." This thesis will show that the Academy became a transitional phase in these middle-class youths' lives while they decided if they liked a naval career.


identifier: Peters, Helen <https://research.library.mun.ca/view/creator_az/Peters=3AHelen=3A=3A.html>   (1972) A critical edition of the odes of Mark Akenside, M.D.  Masters thesis, Memorial University of Newfoundland.

abstract: This thesis presents a critical edition of the Odes of Mark Akenside based on the official posthumous edition of his collected poetic works, as edited by his friend Jeremiah Dyson in 1772. Two odes, not included in Dyson’s edition, one in The Gentleman ‘s Magazine (1739) the other in John Garnett’s New Brunswick edition of Akenside’s works (1808), have been attributed to the poet by several of his biographers and are included in the present text.  Of the odes published by Dyson, roughly half are presented in their final-revised forms but had been published previously in earlier versions. This edition, therefore, also presents in the textual apparatus the earlier substantive authorial variants of these odes in a manner designed to allow reconstruction of the earlier versions. -- The Introduction discusses Akenside ‘s use of the ode form, particularly his attempt to imitate classical models in Neo-classic idiom and conventions. In the discussion, the recent tradition of Akenside criticism, based largely on “The Pleasures of Imagination” and the poet’s alleged pre-Romantic tendencies, is dismissed as having little bearing on the Odes, for the study of these poems reveals him as a practitioner of an established tradition rather than as an innovator of a new form of poetry. -- The second part of the Introduction discusses the nature of his revisions, some of which show his struggle to compose English odes based on classical models in accordance with the diction and decorum of the Augustans; others are of a kind common to all poets who habitually reworked their poems. Revision is widespread in a surprisingly large number of authors, and, as such information is of importance in the study of literary works, this thesis has as one of its principal concerns the devising of editorial procedures to reflect the complexity of the textual evidence in one revising poet.


identifier: Zhao, Liang <https://research.library.mun.ca/view/creator_az/Zhao=3ALiang=3A=3A.html>   (2001) Synthesis, structural and magnetic properties of high nuclearity self-assembled cluster complexes.  Masters thesis, Memorial University of Newfoundland.

abstract: This thesis describes synthesis, structural and magnetic properties of high nuclearity cluster complexes self assembled from polydentate alkoxo-diazine ligands. In Chapter 1. clusters and self-assembly have been briefly reviewed. In Chapter 2. synthesis, characterization. X-ray structures and the magnetic properties of three trinuclear copper(II) complexes are described. These compounds exhibit moderate to strong antiferromagnetic coupling as a result of superexchange via the N-N linkages. The magnetic properties are explained on the basis of large rotational angles of the copper magnetic planes about the diazine bridges. In Chapter 3. four predominantly square grid M₄(µ-O)₄ (M = Cu(II), Ni(II) and Co(II)) complexes and a rectangular Mn₄(N-N)₂O₂ grid complex are synthesized and structurally characterized by X-ray techniques. The square [2x2] copper(II) cluster exhibits intramolecular ferromagnetic spin exchange, associated with the orthogonal alkoxide bridging arrangement and the close proximity of the copper centers. Both the Ni₄(µ-O)₄ and Co₄(µ-O)₄ clusters are antiferromagnetically coupled due to the large M-O-M angles and for the rectangular Mn₄ complex the exchange is dominated by antiferromagnetic coupling via the N-N bridge. Chapter 4 describes the ligand paoh. which has two widely separated tridentate (N₂O) terminal coordination pockets, and uncoupled square [2x2] Fe(II)₄ grid complex. Replacement of the NH₂ groups with 2-pyridyl residues gives the ligand dpkoh with the additional coordination capacity of an exo-N₄ coordination pocket, leading to an octanuclear metallacyclic cluster complex [Ni₈(dpkoh-2H)₄(H₂O)₈](ClO₄)₈.4H₂O, in which eight nickel(II) centers are bridged just by the diazine N-N single bond. Substantial antiferromagnetic coupling exists between the nickel(II) ions throughout the metallacycle. In Chapter 5. the synthesis, structural characterization and magnetism studies of [3x3] Mn(ll) and Cu(II) nanonuclear square grid complexes are described. The Mn(II)o systems exhibit intramolecular antiferromagnetic coupling, while for the Cu(II)q complexes ferromagnetic exchange is observed with an S = 7/2 ground state. The aggregation of nine octahedral Mn(II) and Cu(II) centers (fifty four coordination positions) into an alkoxo-bridged, portcullis-like [3x3] grid by six heptadentate 2poap ligands (fifty four donor positions) is a unique example of a self assembly process.


identifier: Desplanques, Marie-Annick <https://research.library.mun.ca/view/creator_az/Desplanques=3AMarie-Annick=3A=3A.html>   (1991) Women, folklore and communication : informal social gatherings in a Franco-Newfoundland context.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract: As elsewhere in the world, Franco-Newfoundland women feel a need to socialize with their peers. They do this whenever the opportunity arises, although their role as wives, mothers or housekeepers is so demanding that they must actively create such social occasions. -- This doctoral dissertation focuses on the dynamics of verbal interaction which takes place during such informal women's gatherings. Verbal interaction in these contexts is often expressed in specific folklore genres and an examination of these genres in characteristic ethnographic contexts permits the delineation of patterns of women's communication and enables us to make an assessment of their significance. The data allowing for such an examination were collected during three summers spent in the community of Cape St. George, Port-au-Port Peninsula, Newfoundland. Tape-recorded interviews made as a participant observer were used to obtain biographical data from selected informants, and to record interaction in small groups of women, men, and mixed groups. Fieldnotes supplement the tape-recorded data, documenting the sociocultural context, ranging from concrete physical surroundings to abstract kinship patterns, in order to convey the full social ambiance. -- This study adopts the principles of ethnoscience, essentially an emic approach seeking to determine the folk's own definition of experience, as a method of classification and data organization utilizing folk taxonomy. The data is analysed and discussed following the theory of ethnography of communication, a method of analysis facilitating the examination of the organization and meaning of acts of communication in sociocultural contexts. The gatherings are considered as communicative events, whose participants are members of the same speech community. Folklore genres occurring in these events are examined in terms of the dynamics that govern and result from their expression. Because such gatherings recur with high frequency and exist in different but recognizable variants (according to time, setting, pretexts and participants), whether they are planned (usually through informal oral means of communication such as the telephone) or whether they are unplanned, these gatherings, in terms of their form and content, are seen as desirable customary activities by the participants. -- Scholarly attention has yet to be focused on women's informal gatherings as an aspect of customary tradition. Thus a particular focus on this aspect as a traditional though barely recognized context for ethnographic communication not only furthers but helps validate the study of women as members of several social subgroups of which gender is in each case a constant amongst varying defining factors such as age and marital status, geographic location, kinship, occupation, education and  economic status, to name the most obvious. The members of these subgroups share a multidimensional sense of identity, while retaining their distinctive personality. It also demonstrates that in the context of exclusively women's gatherings, participants use specific expressive behaviours which are intrinsic to these situations. -- By defining and analysing the dynamics of these gatherings, it should be possible to provide answers to a series of problems deriving from interest in gender-specific studies in folklore: 1) What is the nature of women's discourse and its expression in folkloric terms? 2) How does it function in a specific context? 3) What consequences does gender- specific analysis have on the theoretical interpretation of ethnocultural data? While recent publications have shown a growing interest in the study of women and folklore, this domain still lacks theoretical perspective, especially regarding the ways in which gender affects performance. -- This dissertation attempts to fill a gap that will allow the social sciences in general and folklore in particular, to broaden their present perspectives in the specific area of women, folklore and communication. Moreover, although a few researchers have devoted substantial work to some aspects of Franco-Newfoundland culture, none has yet undertaken any research with a specific emphasis on women's traditions, perceptions and expressive behaviour in this culture.


identifier: Hwang, Faustina <https://research.library.mun.ca/view/creator_az/Hwang=3AFaustina=3A=3A.html>   (2000) A petri net on-line controller for the coordination of multiple mobile robots.  Masters thesis, Memorial University of Newfoundland.

abstract: In applications such as mining, space exploration, and toxic waste cleanup, mobile robots are often required to move within a common environment and to share resources. This introduces the need for a means of coordinating their behaviours. Also, due to the unpredictable nature of the worksite, there is a need to accommodate changes in a dynamic environment. -- A general framework for group robotics was developed in response to this need. The framework includes a discrete event controller for on-line control and runtime monitoring, the focus of the current research. -- A Petri net based discrete event formalism has been investigated as a basis for the development of an on-line controller, ftom a high-level task description, a set of rules have been used to automatically generate a Petri net structure that provides coordinated behaviour. The Petri net can then be executed to send instructions to robots and to incorporate feedback from the robots at runtime. This on-line controller has been used to control mobile robots in a proof-of-concept demonstration. In a laboratory setting, the Petri net controller was able to coordinate the behaviour of two robots in marker-based navigation tasks. -- Although the work completed to date has provided promising results, many research challenges remain. Some suggestions for future work are presented.


identifier: Nagler, James Joseph <https://research.library.mun.ca/view/creator_az/Nagler=3AJames_Joseph=3A=3A.html>   (1991) Vitellogenesis and aspects of its pituitary regulation in teleosts with emphasis on winter flounder (Pseudopleuronectes americanus).  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract: The ovarian uptake of the homologous serum proteins vitellogenin (VG) and very high density lipoprotein II (VHDL II) (formerly peak A protein) were studied as potential yolk precursors involved in vitellogenesis in winter flounder (Pseudopleuronectes americanus). The major yolk precursor appears to be VG based on the quantity of yolk protein that recognizes the VG and VHDL II antisera by Western blotting. The rate of uptake of VG by the ovary is about three times greater than VHDL II. Internalized VG is processed into a 280,000 relative molecular mass (Mr) yolk protein (lipovitellin) that contributes to the major fraction (82%) of ovarian protein. Accumulation of VHDL II occurs in an unprocessed form and contributes to a fraction of ovarian protein representing 12% of the total. Phosvitin and a low Mr phosphoprotein were apparent but in small amounts. -- In vitro ovarian incubations done during the prespawning to early vitellogenic phases of the reproductive cycle in winter flounder showed that pituitary extract stimulates estradiol-17β (E₂) production only during the vitellogenic phase, while induced testosterone (T) production was greatest shortly before spawning. These observations were reflected in the seasonal pattern of serum levels of E₂ and T in female winter flounder. To investigate the effect of sockeye salmon carbohydrate-poor (Con A I) and carbohydrate- rich (Con A II) pituitary protein fractions on E₂ production,, ovarian follicles with (intact) or without the surface epithelium-thecal cell layer (defolliculated) from rainbow trout (Qncorhvnchus mykiss) were incubated in vitro. It was demonstrated that Con A I in the presence of T is capable of significantly increasing E₂ production in defolliculated ovarian follicles while under similar conditions Con A II (containing the maturational gonadotropin) was not. Purified salmonid and pleuronectid growth hormones (GHs) were tested for their ability to increase either E₂ and T production during in vitro ovarian incubations in both rainbow trout and winter flounder respectively, but were found to be inactive. -- Growth hormones were isolated from the pituitaries of sockeye salmon (Qncorhvnchus nerka) and American plaice (Hippoglossoides platessoides). A bioassay based on the increase of serum triiodothyronine in rainbow trout was developed to follow GH biological activity during pituitary fractionation. The isolation of a pituitary protein from sockeye salmon that was active in the bioassay was confirmed as monomeric GH by an amino-terminal (N-T) amino acid sequence. In plaice GH variants were isolated from two Mr regions within the pituitary, 42,000 and <33,000, that were active in the bioassay and had identical N-T amino acid sequences. The 42,000 Mr form predominates in the plaice pituitary making up 93% of the total.


identifier: Barimah-Asare, John <https://research.library.mun.ca/view/creator_az/Barimah-Asare=3AJohn=3A=3A.html>   (1991) Symbiotic nitrogen fixation in two species of leguminosae : Lathyrus maritimus (L) Bigel. and Oxytropis campestris (L) DC.  Masters thesis, Memorial University of Newfoundland.

abstract: The symbiotic association of Rhizobium strains and two species of legumes, Lathyrus maritimus (L.) Bigel. and Oxytropis campestris (L.) DC found in subarctic regions of Newfoundland were investigated. The root nodule bacteria were isolated and routinely characterized using standard techniques for Rhizobium species. The isolate of L. jnaritimus was found to resemble fast-growing Rhizobium leguminosarum biovar vicia, except in its ability to tolerate a wide range of pH and a high concentration of NaCl. The isolate of 0. Campestris exhibited characteristics which resembled those of both slow-growing and fast-growing strains. Both isolates could grow, although slowly, at a low temperature (5°C). -- Cross inoculation tests were performed using the isolates on other legume species. The isolate of O. campestris could not infect any of the hosts used while that of L. maritimus could infect Vicia cracca. -- Growth patterns and external morphology of the symbiotic root nodules were studied. The beaded structure of field-collected nodules indicate that they resume growth after overwintering annually. The results of laboratory-grown specimens showed that nodules of both species attain a maximum size after which no growth occurs. Nitrogen fixation was assessed in the legumes using the acetylene reduction method with nodulated root systems. The two species showed highest nitrogenase activity at 20°C and were still capable of activity at low tempertures; for example, nodules of L. maritimus and 0. campestris were able to maintain 35% and 80% of their maximum activities respectively at 5°C, showing their adaptation to nitrogen fixation in the cold. -- The anatomy of L. maritimus root nodules was studied using light and electron microscopy. They were found to possess a zonal differentiation from the tip to the point of attachment to the root; i.e. the meristem, invasion zone, early symbiotic zone, late symbiotic zone and the senescent region. Nodules possessed lipid bodies which were more abundant in the cortical cells. The lipid bodies may be involved in the protection of the nitrogen-fixing tissue from the cold environment by forming an insulating jacket around it. -- These studies indicate that the legumes and their symbionts are adapted to function effectively at low temperature and therefore could be of significance in land reclamation and for other purposes in marginal northern agricultural areas. The unique characteristics shown by the isolates can be useful to other Rhizobium and Bradyrhizobium strains by transferring them, using DNA recombinant techniques.