Research Repository
LU|ZONE|UL distributes and preserves the scholarly work of LU faculty. It is a space for faculty to support the dissemination of knowledge created at Laurentian.
Electronic Theses and Dissertations (ETD) Repository This section preserves Master's theses and doctoral dissertations accepted at Laurentian University and is a mechanism for making this form of scholarly work widely accessible.
Communities in LU|ZONE|UL
Select a community to browse its collections.
Recent Submissions
Geochemistry and petrography of the Grywacke Wallrock hosting the Three Nations Gold-Quartz Vein system, Pamour #1 Mine, Timmins, Ontario
(Laurentian University Library & Archives, 1985-06-27) Lickley, William Peter
This study investigates geochemical and mineralogical changes in altered Archean metagreywacke around the Three Nations Gold-Quartz Veins, Pamour 1 Mine, Timmins, Ontario. Variation in the clay contents of the unaltered greywacke-argillite host rock make interpretation of geochemical trends very difficult. These difficulties were overcome by using Si0₂/Al₂0₃ ratios as an estimate of clay content in these rocks. Oxide versus Si0₂/Al₂0₃ diagrams for selected oxides in the unaltered rocks illustrations compositional variations by the use of end member mixing curve from which pre-alteration element abundance may be estimated for any sample or Si0₂/Al₂0₃ value. The difference between the altered rock, element abundance and its corresponding calculated pre-alteration abundance represents the estimated per cent alteration which has occurred. Percent alteration profiles across the vein system show much less background scatter than unprocessed date profiles and more clearly represent the degree of alteration.
Per cent alteration profile and petrographic data outline three alteration zones associated with the vein: Ⅰ. The outer sericite-chlorite zone which consists of chlorite, sericite, plagioclase, albite, dolomite and pyrite; Ⅱ. The sericite zone which consists of sericite, relic plagioclase, dolomite and pyrrhotite pseudomorphs after pyrite; Ⅲ. The innermost arsenopyrite zone which consists of sericite, dolomite, arsenipyrite and pyrrhotite with arsenopyrite and magnetite directly adjacent to the vein. The variations in the silicate and sulphide mineralogy and percent alteration around the vein are the result of changes in the aK⁺/aH⁺ and the S/0 fugacity ration in solutions as alteration progressed.
Exploring food insecurity’s impact on eating behaviours in Canada’s younger populations: an integrative review
(Laurentian University Library & Archives, 2024-08-16) Whynott, Emily
Background: Food insecurity, characterized by inadequate access to sufficient and nutritious food, poses significant challenges in Canada. Despite efforts to address this issue, food insecurity remains prevalent, particularly among younger populations. It has been linked to adverse health outcomes and altered eating behaviour.
Purpose: This research aims to explore the impact of food insecurity on eating behaviours among Canada's younger populations over the past five years, focusing on the a) empirical relationships between food insecurity and eating behaviours and b) the gaps and limitations in the research.
Method: Whittemore and Knafl's integrative review methodology will be utilized to conduct a comprehensive synthesis of empirical studies, including quantitative, qualitative, mixed-methods and gray literature, to understand the multifaceted relationship between food insecurity and eating behaviours. The Social Ecological Model will be used to understand the individual, interpersonal, organizational, community, and policy impacts.
Discussion: The results of this review have the potential to inform policies and interventions aimed at addressing food insecurity and improving eating behaviours among Canadian children, adolescents and young adults. Identifying the research gaps will also allow us to guide future research prioritization in the country.
Les perceptions des enseignant.e.s francophones d’éducation physique et santé (EPS) de l’élémentaire en Ontario relatives au développement de la pensée critique des élèves en classe d’EPS
(Laurentian University Library & Archives, 2025-06-12) Bini, Yao Bama Ozias
Cette étude vise à comprendre les perceptions des enseignant.e.s francophones d’éducation physique et santé (EPS) de l’élémentaire en Ontario concernant le développement de la pensée critique (PC) chez leurs élèves. Elle explore leur compréhension de la nature et du rôle de la PC, ainsi que les stratégies pédagogiques qu’ils déclarent utiliser. Malgré l’importance accordée à la PC dans le programme-cadre ontarien (MÉO, 2019), peu d’études portent sur sa mise en œuvre en EPS. S’inscrivant dans le courant de la « pensée des enseignants », cette recherche qualitative exploratoire repose sur un questionnaire et des entrevues menées auprès de 26 enseignant.e.s. L’analyse des déclarations des participant.e.s révèle une conceptualisation partielle de la nature et une meilleure conceptualisation du rôle de la PC ainsi qu’une connaissance très élaborée de l’utilisation des stratégies actives centrées sur l’élève (jeux, discussions réflexives, études de cas). L’étude recommande d’approfondir les recherches sur les pratiques effectives pour évaluer concrètement la mise en œuvre des déclarations dans le développement de la PC en contexte d’EPS.
Complement C5a and adrenal cell function: examining a potential mechanism of adrenal dysfunction in sepsis
(Laurentian University Library & Archives, 2024-06-19) Mrozewski, Lucas
The complement system is critically involved in the pathogenesis of sepsis. In particular, complement anaphylatoxin C5a is generated in excess during sepsis, leading to cellular dysfunction. Recent studies have shown that excessive C5a impairs adrenomedullary catecholamine production and release. Currently, the mechanisms by which C5a impacts adrenal cell function are poorly understood. Cellular and molecular techniques were utilized to identify the effect of C5a on a cell culture model employing PC12 cells derived from a rat pheochromocytoma (tumour of adrenal medullary chromaffin cells). This thesis identifies impairment of PC12 cell function following septic-level exposure to C5a, as well as an immediate increase in catecholamine release, followed by a decrease in catecholamine biosynthetic enzyme expression and catecholamine secretion. Furthermore, septic-level C5a induces apoptosis in PC12 cells through C5aR-dependent protein kinase signalling. These results provide insight into the regulation of catecholamine biosynthesis and release and the mechanism of adrenal dysfunction in sepsis.
Advancing Chinese Whole Nation system through supporting first level athletes’ meta-transitions
(Laurentian University Library & Archives, 2025-04-10) Li, Yufeng
Elite athletes’ holistic development has recently brought to our attention as many elite athletes faced challenges, such as mental health issues, both within and outside of their sport careers (Schinke, Henriksen et al., 2024). How to support elite athletes’ development, as well to optimize their respective sport environments have been hot research topics for researchers and practitioners in sport psychology (Stambulova et al., 2021; Wagstaff & Quartiroli, 2023), but also an important question for athletes, coaches, parents, sport managers, as well sport systems (Henriksen, Stambulova et al., 2024). These organizations and persons, who hold one or multiple of above identities, are involved with and sometimes responsible for supporting athletes’ development. Fully excavating athletes’ development and relevant experiences urges researchers to develop a better understanding of athletes’ career development and transitions within their contexts. Most such studies have been developed by exploring athletes’ career experiences (see Stambulova & Ryba, 2013), conducted mainly from Western countries (Stambulova et al., 2021). These conceptual foundations, developed in Western countries situated within Western philosophies, tend not to be fully relevant, compatible, and appropriative when understanding, in my project, Chinses athletes’ experiences and their respective sport environment (Chinese Whole Nation System, CWNS, Li et al., 2023).
Missing from our conceptualization of Chinese athletes’ career development pathways and meta-transitions (Schinke et al., 2015) are the insights of Chinese elite athletes, who navigate demands and cope with barriers to strive career excellence in the CWNS. Situated within a Confucian relationism (Hwang, 2012, 2015), I approached this research with the concept that athletes’ meta-transitions, as moral cultivation processes with social responsibility, are interrelated with social and sport contexts. My aim within this research project was to explore Chinese elite athletes’ experiences to inform context-driven recommendations for improving the CWNS, eventually contributing to athletes’ holistic development. The research process began with a group reflection exercise conducted by me as a co-participant with two elite athletes who have experienced career transitions within the CWNS. This group reflection study was written to provides a snapshot of the context of athletes’ meta-transitions within the CWNS, providing a rich foundation for nuanced individual experiences during their unified meta-transitions. Group reflective practice interviews were then employed with 14 Chinese elite athletes to help them reflect and learn from their meta-transition experiences within the CWNS. A template analysis was utilized to develop themes that related to the athletes’ experiences. Five meta-transitions with two central themes were created to outline (1) athletes’ needs and challenges, and (2) athletes’ psychological skills and characteristics, at each nuanced meta-transition. These themes were constructed into three polyphonic tales, a form of data representation but also as an interventional strategy encapsulates the concept of science to practice (Schinke, Wylleman et al., 2024). Finally, these findings and data collection/representation methods were translated into practice through a series of recommendations for scientist-practitioners, submitted to an applied journal. The conclusions, implications, and recommendations arising from the four manuscripts, which constitute this dissertation, are presented.