Digital Commons Network^™

Grassroots Consumption: Ontario Farm Families’ Consumption Practices, 1900-45, Andrea M. Gal

Theses and Dissertations (Comprehensive)

Popular culture and academic perceptions typically view farmers of the past in one of two ways. On the one hand, we tend to emphasize their roles as producers of agricultural commodities, and marginalize or underemphasize their roles as consumers. On the other, we might believe that farmers were simply the passive recipients of broader societal trends and developments, and think that they followed in the footsteps of their urban counterparts. A small but growing number of scholars are engaging with these views, as they examine the consumption practices of rural North America. This historiography, however, is largely centered in the …

Nickel And Copper Mixture Toxicity To Daphnia In Soft Water, Prachi Deshpande

Theses and Dissertations (Comprehensive)

Industrially important metals, such as Cu and Ni, sometimes are present at elevated concentrations in lakes, including those in the Sudbury, ON region. Although they are essential metals, their divalent-cation state (Cu²⁺ and Ni²⁺) can be toxic at high concentrations in the water. The free-ion toxicity of each of these metals has been studied in isolation, but rarely as a mixture. The economic importance of Cu²⁺ and Ni²⁺ makes them essential to study in the context of mixture toxicity. The objectives were to: (1) determine Cu and Ni mixture toxicity to Daphnia through acute LC50 …

The Sublethal Physiological Effects Of Exposure To Copper And Silver Mixtures On Rainbow Trout (Oncorhynchus Mykiss), Wesley Truong

Theses and Dissertations (Comprehensive)

The mechanisms behind metal-metal interactions in freshwater environments are currently not well understood. Freshwater environments consist of many different types of metals, from those naturally present such as copper (Cu) and those that originate from anthropogenic sources like silver (Ag). Both Cu and Ag use apical sodium (Na⁺) channels for uptake into the gills of freshwater fish. In the gills, the mechanisms of Cu²⁺ and Ag⁺ toxicity appear to be similar to one another, which is by inhibiting Na⁺ /potassium (K⁺)- adenosine triphosphatase (NKA) and carbonic anhydrase (CA). Inhibition of NKA and CA …

Changes In Brain Water Content In The Rainbow Trout (Oncorhynchus Mykiss) And In The Goldfish (Carassius Auratus) Due To High External Ammonia Exposure, Phillip Q.H. Pham-Ho

Theses and Dissertations (Comprehensive)

In fishes, hyperammonemia may occur following feeding or exposure to abnormally high concentrations of environmental ammonia due to sewage effluents, agricultural run-off and in crowded aquaculture pens. Increased internal ammonia can result in hyperactivity, convulsions, coma and death. In mammals, it is also associated with potentially fatal brain edema, in which the accumulation of intracellular water results in swelling, increased intracranical pressure and herniation leading to death. Recently it was shown that rainbow trout (Oncorhynchus mykiss) and goldfish (Carassius auratus) experience brain swelling following exposure to high external ammonia (HEA). However, the mechanism of ammonia-induced brain …

The Bigger Picture: Piecing Together The Experiences Of Family Members Living With High-Functioning Children With Autism Spectrum Disorder, Lauren Thomson

Theses and Dissertations (Comprehensive)

The purpose of this research was to explore the experiences of family members living with a child with ASD. The specific research questions that were addressed included: 1. How is a family member affected by having a child with ASD in the family unit; and 2. How does living with a child with ASD affect family functioning? The theoretical orientation of phenomenology was used to guide this research and to allow the “voice” of family members of children with ASD to be heard. The purpose of phenomenology is to distill individuals’ experiences with a phenomenon down to an “essence” of …

Do Toxicity Modifying Factors Influence Acute Or Chronic Toxicity Of Thulium To Hyalella Azteca?, Alexandria H. Loveridge

Theses and Dissertations (Comprehensive)

The industrial demand for rare earth elements (REEs) is growing and as a result, environmental exposure is a concern. Very little is understood about the toxicity of REEs in aquatic environments. The objective of this research is to evaluate the acute and chronic toxicity of Tm and to also understand the toxicity modifying influence of dissolved organic matter (DOM) and cationic competition (Ca2+, Mg2+ and Na+). Furthermore, the aim of this study was to determine linkages between Tm bioaccumulation, growth and survival during chronic exposures. Standard methods (Environment Canada) were followed for both 96h acute and 14d chronic tests, in …

Multi-Criteria Decision Analysis (Mcda) For Agricultural Sustainability Assessment, Byomkesh Talukder

Theses and Dissertations (Comprehensive)

Multi Attribute Utility Theory (MAUT), Preference Ranking Organization Method for Enrichment Evaluations (PROMETHEE) and Elimination methods of Multi-Criteria Decision analysis (MCDA) are tested to assess and compare the sustainability of different agricultural systems. Indicators and composite indicators are derived from data gathered using the agricultural sustainability categories of Productivity, Stability, Efficiency, Durability, Compatibility and Equity (PSEDCE).

Agricultural systems around the world face challenges from current agricultural practices, over-exploitation of natural resources, population growth and climate change. As a result, understanding agricultural sustainability has become a global issue. Assessment is a first step in benchmarking and tracking agricultural sustainability and …

Sexual Orientation Microaggressions On Campus: Prevalence And Outcomes Among Lesbian/Gay And Bisexual Students, Pamela Sariyannis Ms.

Theses and Dissertations (Comprehensive)

Microaggressions are subtle, often-unintentional forms of discrimination that convey negative messages about targeted individuals. While empirical attention to sexual orientation microaggressions is growing, little is known about their prevalence among specific groups of sexual minorities. Using data (n = 438) from the US-based National Study of LGBTQ Student Success, this study examines: (1) the prevalence of both general sexual orientation microaggressions and erasure of sexuality and hypersexualization microaggressions among bisexual college students and their gay/lesbian peers; (2) the relationship between each type of microaggression and sexual orientation on student outcomes (depression, substance use, and social acceptance); (3) the role of …

Metabolic Scaling Physiology And The Uptake, Elimination And Toxicity Of Tfm (3-Trifluoromethyl-4-Nitrophenol) To Invasive Sea Lampreys (Petromyzon Marinus), Laura R. Tessier

Theses and Dissertations (Comprehensive)

Sea lampreys (Petromyzon marinus) have a complex life cycle that involves a parasitic phase in which they feed on the blood and bodily fluids of large piscivorous fishes. Following the invasion of the Great Lakes by sea lampreys in the early 20^th century, sea lamprey parasitism contributed to major declines in the populations of commercial and sports fisheries in that basin. The lampricide 3-trifluoromethyl-4-nitrophenol (TFM), developed in the late 1950s,is now routinely applied to tributaries of the Great Lakes to control sea lamprey populations. This lampricide is selectively toxic to larval sea lampreys, which typically reside as …

Causes And Consequences Of Variation In Female Mate Choice And Its Relation To Sexual Conflict In Drosophila Melanogaster, David Cs Filice

Theses and Dissertations (Comprehensive)

Female mate choice is a significant driving force of evolutionary change and can explain the evolution of exaggerated male traits and/or displays, and dimorphism between the sexes. Females are thought to choose mates based on the greatest provision of direct or indirect benefits. Despite this, we often still see substantial individual variation in female mate choice behaviours both within and across populations. Recent studies suggest that female mate choice is a complex decision-making process that involves many context-dependent factors. However, the precise sources of this variation, such as previous mating experience, are not completely understood. In Drosophila melanogaster, mating …

The Effect Of Menstrual Cycle Phase On Appetite-Regulating Hormones, Logan Townsend

Theses and Dissertations (Comprehensive)

Background: Obesity rates are higher among females than males potentially due to changing food intake across the menstrual cycle. Food intake is partially regulated by circulating appetite-regulating hormones that can be influenced by the menstrual hormones estradiol and progesterone. Purpose: Examine whether changes in female sex hormones across the menstrual cycle are related to appetite-regulating hormones. Methods: 8 healthy young females were tested during the follicular, ovulatory, and luteal phases; phases were confirmed by fasting plasma hormone concentrations. Blood samples were taken after an overnight fast, as well as 30, 60, and 90 min post-prandially to test the concentrations of …

Holding Canada Accountable: An Evaluation Of Canada's Compliance To The United Nations Declaration On The Rights Of Indigenous Peoples, Jackson A. Smith

Theses and Dissertations (Comprehensive)

Compliance of human rights norms requires the application of pressure from a multitude of directions and levels. It takes individual advocacy, micro-system/organizational/community-level pressure, and macro-level pressure from other nation-states and international organizations and governance bodies. This MA study focuses on the mechanisms employed by the United Nations to monitor the compliance of signatory nation-states to the standards established in the United Nations Declaration on the Rights of Indigenous Peoples (UNDRIP), with particular focus on Canada. A crucial goal of this study is to translate the UN Special Rapporteur on the Rights of Indigenous Peoples (UNSRRIP), James Anaya’s, findings on the …

The Influence Of Hip Mobility And Fatigue On Spinal Flexion And Muscle Activation In Rugby Scrum Performance, Joshua D. Clayton

Theses and Dissertations (Comprehensive)

Introduction: Rugby scrumming is a means of restarting play following a minor rule infringement that can occur up to 28 times per game. The scrum poses a significant injury risk, with more days missed due to injury per event than any other rugby activity. Rugby players also have a significantly higher rate of spine injury than the general population, perhaps due to flexion in combination with high compression forces, which has been cited as the main mechanism of injury. Flexion of the spine has also been associated with poor hip mobility and quadriceps fatigue in other athletic tasks and may …

Chemical Removal Of Total Phosphorus From Wastewater To Low Levels And Its Analysis, Farah Ateeq

Theses and Dissertations (Comprehensive)

Numerous studies have been conducted on the removal of inorganic phosphorus (P) from wastewater, but a push towards lower effluent targets necessitates the additional removal of organic phosphorus as well. This study tested the ability of manganese oxide nanoparticles and iron oxide as potential catalysts for conversion of organic P into more readily removable inorganic forms, as well as the role of iron(III) chloride as coagulant to subsequently allow P to be removed by solids/liquid separation. Removals of 99-101% were obtained for model compounds at pH 5-7, 0.05-0.5 M H₂O₂, and Fe:P molar ratio of 5:1. …

Impact Case Studies Submitted To Ref 2014: The Hidden Impact Of Nursing Research, Daniel Kelly, Bridie Kent, Ann Mcmahon, Julie Taylor, Michael Traynor

School of Nursing and Midwifery

The UK’s Research Excellence Framework (REF) 2014 rated the research from 154 universities, and the impact of research was evaluated in 6975 impact case studies. Nursing was returned within unit of assessment (UoA) 3, which also included Dentistry, Pharmacy and Allied Health Professions, although nursing research was also submitted within other UoAs. The study aim was to collate and categorise available REF impact case studies involving nursing researchers or on topics of relevance to nursing. Using nurs* as a search term, 469 case study entries were retrieved from the REF database and placed into three categories determined by the level …

Editor's Page, Randall W. Younker

Journal of the Adventist Theological Society

No abstract provided.

Integrated Terrestrial And Marine Planning In England’S Coastal Inter-Tidal Zone: Assessing The Operational Effectiveness Of The Coastal Concordat, Jonathan Turner, Stephen Essex

School of Geography, Earth and Environmental Sciences

No abstract provided.

Spectral And Chromatographic Characterisation Of The Onoceroid, Ambrane: A Potential Novel Biological Marker, Paul A. Sutton, Steven J. Rowland

School of Geography, Earth and Environmental Sciences

The gas chromatography–mass spectrometry (GC–MS) characteristics, including GC retention indices and mass spectra, of isomers of the tricyclic onoceroid C30 hydrocarbon, ambrane (1,1,4a,6-tetramethyl-5-{4-methyl-6-[2,2,6-trimethylcyclohexyl]hexyl}decahydronaphthalene) are reported. Ambrane is yet to be reported in sediments or petroleum: other biochemically-related onoceroids, such as onoceranes and serratanes, have been. Now that GC–MS data are available, a search for ambranes in geochemical samples may be both feasible and warranted.

Amazon Forest Response To Repeated Droughts, T. R. Feldpausch, O. L. Phillips, R. J.W. Brienen, E. Gloor, J. Lloyd, G. Lopez-Gonzalez, A. Monteagudo-Mendoza, Y. Malhi, A. Alarcón, Dávila E Álvarez, P. Alvarez-Loayza, A. Andrade, L. E.O.C. Aragao, L. Arroyo, C. Ga Aymard, T. R. Baker, C. Baraloto, J. Barroso, D. Bonal, W. Castro, V. Chama, J. Chave, T. F. Domingues, S. Fauset, N. Groot, Coronado E Honorio, S Laurance, Wf Laurance, S. L. Lewis, J. C. Licona, B. S. Marimon, B. H. Marimon-Junior, Bautista C Mendoza, D. A. Neill, E. A. Oliveira, E. A. Oliveira, Camacho Nc Pallqui, G. Pardo-Molina, A. Prieto, C. A. Quesada, F. Ramírez, H. Ramírez-Angulo, M. Réjou-Méchain, A. Rudas, G. Saiz, R. P. Salomão, J. E. Silva-Espejo, M. Silveira, Steege H Ter, J. Stropp, J. Terborgh, R. Thomas-Caesar, Der Heijden Gmf Van, Martinez R Vásquez, E. Vilanova, V. A. Vos

School of Geography, Earth and Environmental Sciences

No abstract provided.

Culture, Worldview, Biblical Interpretation, And Mission, Gorden R. Doss

Journal of Adventist Mission Studies

No abstract provided.

Subjective Well-Being Among Malaysian Students, Mazni Mustapha

School of Psychology Theses

The aim of the study was to examine the determinants of well-being in Malaysian students at home and overseas. Prior to the main study, interviews were conducted with seven PhD students of Malaysia studying in Plymouth, to explore their needs and values, and their adaptation experiences in terms of missing and enjoyment experiences abroad. Based on the interview findings and literature reviews, a questionnaire was developed and named as the Adaptation to Life Index, which consisted of two scales - ‘missing experience’ and ‘enjoyment experience’. A longitudinal survey was carried out using Malaysian students in the UK, Australia, New Zealand, …

Visual Pigments, Ocular Filters And The Evolution Of Snake Vision, Bruno F. Simões, Filipa L. Sampaio, Ronald H. Douglas, Ullasa Kodandaramaiah, Nicholas R. Casewell, Robert A. Harrison, Nathan S. Hart, Julian C. Partridge, David M. Hunt, David J. Gower

School of Biological and Marine Sciences

Much of what is known about the molecular evolution of vertebrate vision comes from studies of mammals, birds and fish. Reptiles (especially snakes) have barely been sampled in previous studies despite their exceptional diversity of retinal photoreceptor complements. Here, we analyze opsin gene sequences and ocular media transmission for up to 69 species to investigate snake visual evolution. Most snakes express three visual opsin genes (rh1, sws1, and lws). These opsin genes (especially rh1 and sws1) have undergone much evolutionary change, including modifications of amino acid residues at sites of known importance for spectral tuning, with several tuning site combinations …

Material Type And Roughness Influence Structure Of Inter-Tidal Communities On Coastal Defenses, Eva Cacabelos, Gustavo M. Martins, Richard Thompson, Afonso C.L. Prestes, José Manuel N. Azevedo, Ana I. Neto

School of Biological and Marine Sciences

No abstract provided.

Impacts Of Climate Change, Agroecology And Socio-Economic Factorson Agricultural Land Use Diversity In Bangladesh (1948–2008), S Rahman

School of Geography, Earth and Environmental Sciences

The paper examines the impacts of climate change, agroecology and socio-economic factors on agricultural land use diversity (ALUD) using a panel data of 17 regions of Bangladesh covering a 61 year period (1948–2008) by applying a dynamic panel GMM estimator. Results revealed that ALUD and total rainfall have actually increased @ 0.19% and 0.02% per year whereas variability in temperature has declined @ 0.06% with significant differences across agroecological zones (AEZs). Among the climatic factors, total rainfall significantly increases ALUD. ALUD is also significantly influenced by agroecological characteristics. ALUD is significantly higher in Ganges River Floodplains but lower in Meghna …

Assessing Walking Posture With Geometric Morphometrics: Effects Of Rearing Environment In Pigs, C Tallet, E Sénèque, C Mégnin, S Morisset, Et Al

School of Biological and Marine Sciences

Rearing social animals like pigs in isolation from conspecifics can have consequences on behaviour and physiology. The aim of this experiment was to determine whether rearing conditions affect body posture. We adapted a method for quantitative evaluation of posture based on geometric morphometrics, developed in horses, for pigs and applied it in different conditions. Forty-eight 75-day-old females were reared either alone in 2.25 m2 pens (IH, N = 24 animals and 4 groups) or in groups of four in 4.64 m2 pens (GH, N = 24) for two weeks. They were habituated to human handling (stroking, speaking) and marking on …

Sources, Distribution, And Fate Of Microscopic Plastics In Marine Environments, Richard C. Thompson

School of Biological and Marine Sciences

No abstract provided.

Innovation And Model Organisms For The Environmental Hazard Assessment Of Engineered Nanomaterials, Rd Handy

School of Biological and Marine Sciences

No abstract provided.

The Transfer Rate Of Salmonella Typhimurium From Contaminated Parsley To Other Consecutively Chopped Batches Via Cutting Boards Under Different Food Handling Scenarios, Dima Faour-Klingbeil, Victor Kuri, Ewen Todd

School of Biological and Marine Sciences

No abstract provided.

Adjudicating Risk: Aids, Crime, And Culpability, Aziza Ahmed

Faculty Scholarship

The AIDS epidemic continues to pose significant public health challenges, especially given that the spread of the virus outpaces the AIDS response.¹ Importantly, HIV continues to disproportionately impact socially and economically marginalized communities. In countries with concentrated epidemics,² it is racial minorities, sex workers, men who have sex with men, and drug users who face the brunt of the epidemic.³ In the United States, the data is startling⁴ : 44% of new infections were among African-Americans, and among African-Americans contracting HIV, 57% were among gay and bisexual men.⁵ In 2016, the CDC found that one …

X-Ray Structure And Properties Of The Ferrous Octaethylporphyrin Nitroxyl Complex, Nagabhushanam Kundakarla, Sergey V. Lindeman, Hafiz Md. Rahman, Michael D. Ryan

Chemistry Faculty Research and Publications

The preparation and characterization of the iron octaethylporphyrin nitroxyl ion, [Fe(OEP)(NO)⁻], is reported. The complex was synthesized by the one-electron reduction of Fe(OEP)(NO) using anthracenide as the reducing agent. The compound was isolated as the potassium (2.2.2)cryptand salt. The anion was characterized using X-ray analysis with visible and infrared spectroscopy. The spectral features of the iron nitroxyl complex were consistent with previous literature reports. The important structural changes upon reduction were a significant decrease in the Fe–N–O bond angle from 142° to 127° and an increase in the N–O bond length from that in the starting nitrosyl moiety. …