Browsing Theses by Subject "Biology"
Now showing items 21-40 of 305
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Bacterial diversity and denitrifier communities in arable soils
(University of Waterloo, 2014-05-21)Agricultural management is essential for achieving optimum crop production and maintaining soil quality. Soil microorganisms are responsible for nutrient cycling and are an important consideration for effective soil ... -
The behavioural ecology of burbot, Lota lota: Diel migrations, spatial behavioural syndromes, and behavioural thermoregulation in a reservoir resident.
(University of Waterloo, 2015-08-21)While the impacts of hydropower development on diadromous and riverine fish species have received considerable attention, the ecology and behaviour of fish species residing in hydropower reservoirs is not well understood. ... -
Benthic macroinvertebrate communities of Lake Simcoe (Ontario, Canada): Investigating an 85 year time-scale
(University of Waterloo, 2013-10-28)Lake Simcoe is the largest inland waterbody in southern Ontario and has been the focus of much scientific study over the past 30 years. Increases in phosphorus loading over the past century have impacted algae and aquatic ... -
Beta-parvin Mediates Adhesion Receptor Cross-Talk During Xenopus laevis Gastrulation
(University of Waterloo, 2013-09-27)Modulation of cell adhesion is essential to the cell rearrangements that characterize Xenopus gastrulation. The spatial and temporal regulation of cell movement requires a highly coordinated cross-talk between cadherin and ... -
Bio-optical Modeling of Aquatic Photosynthesis in the Laurentian Great Lakes
(University of Waterloo, 2010-05-19)The methodology of phytoplankton production measurements in the Laurentian Great Lakes and other freshwater lakes has remained largely unchanged in the past 40 years. In most studies photosynthesis from a single water ... -
Biophysical Studies of Lipid Membranes and their Interactions with Amyloid Peptides
(University of Waterloo, 2015-06-19)Amyloid beta peptides are known to form amyloid fibrils which are implicated in more than 20 currently incurable neurodegenerative diseases, including Alzheimer’s, Huntington’s and Parkinson’s. The proposed mechanism of ... -
The carbon and nitrogen composition of suspended particulate matter in Lake Erie, selected tributaries, and its outflow
(University of Waterloo, 2005)Since their introduction to Lake Erie, dreissenid mussels may have reengineered the cycling of nutrients in the lake so that the nearshore benthic community intercepts, retains, and recycles greater quantities of nutrients. ... -
Carbon Metabolism and Desiccation Tolerance in the Nitrogen-Fixing Rhizobia Bradyrhizobium japonicum and Sinorhizobium meliloti
(University of Waterloo, 2009-04-22)Most members of the Rhizobiaceae possess single copies of the poly-3-hydroxybutyrate biosynthesis genes, phbA, phbB and phbC. Analysis of the genome sequence of Bradyrhizobium japonicum reveals the presence of five homologues ... -
cDNA?GFP Fusion Libraries for Analyses of Protein Localization in Mouse Stem Cells
(University of Waterloo, 2005)Stem cells have great potential value for treating a number of diseases and conditions, including diabetes, Parkinson's, and spinal cord injuries. Applying stem cells for therapeutic purposes will require an in-depth ... -
Celastrol, a proteasome inhibitor, can induce the expression of heat shock protein genes in Xenopus cultured cells
(University of Waterloo, 2010-01-25)Heat shock proteins (HSPs) are stress-inducible and evolutionarily conserved molecular chaperones that are involved in protein binding and translocation. As molecular chaperones, HSPs bind to denatured proteins, inhibit ... -
Cell Cultures from Walleye (Sander vitreus) for Use in Cell Biology and Virology
(University of Waterloo, 2014-09-16)This thesis has developed from the walleye, Sander vitreus (Mitchill), cell lines (WE) and used them to study viral hemorrhagic septicemia virus (VHSV IVb), which is the causative agent for viral hemorrhagic septicaemia ... -
Changes in the biological characteristics of Canadian Arctic charr (Salvelinus alpinus) populations in response to climate-induced environmental variation
(University of Waterloo, 2008-05-01)Abstract The thesis includes two studies of Arctic charr, Salvelinus alpinus, responses to climate variation. In the first chapter, site-specific data from a fishery on the Hornaday River, Northwest Territories (NWT), are ... -
Characterization and expression patterns of five Winter Rye β-1,3-endoglucanases and their role in cold acclimation
(University of Waterloo, 2007-01-23)Winter rye produces ice-modifying antifreeze proteins upon cold treatment. Two of these antifreeze proteins are members of the large, highly conserved, β-1,3-endoglucanase family. This project was designed to identify ... -
Characterization and Genetic Manipulation of D-cysteine Desulfhydrase from Solanum lycopersicum
(University of Waterloo, 2008-05-15)Progress in DNA sequencing of plant genomes has revealed that, in addition to microorganisms, a number of plants contain genes which share similarity to microbial 1-aminocyclopropane-1-carboxylate (ACC) deaminases. ACC ... -
Characterization of Active Cellulolytic Consortia from Arctic Tundra
(University of Waterloo, 2011-05-20)The consortia of microorganisms responsible for the hydrolysis of cellulose in situ are at present poorly characterized. Nonetheless, the importance of these communities is underscored by their capacity for converting ... -
CHARACTERIZATION OF AHR SIGNALING AND THE IMPACT OF POLYCHLORINATED BIPHENYLS ON THE ADAPTIVE RESPONSES TO STRESS IN FISH
(University of Waterloo, 2007-09-13)Persistent organic pollutants (POPs), including polychlorinated biphenyls (PCBs) are widespread in aquatic systems. These toxicants bioaccumulate in the tissues of aquatic organisms, especially fish as they occupy a position ... -
The characterization of checkpoint kinase 2 in Oncorhynchus mykiss: Tissue specific expression suggests biomarker potential
(University of Waterloo, 2007-09-05)Chk2 is a cell cycle checkpoint kinase that is essential for initiating the DNA damage response in the presence of genetic damage. Its role is highly conserved from budding yeast (where it is named Rad53) to humans. Very ... -
Characterization of Dbf4 structure and function in Saccharomyces cerevisiae DNA replication and checkpoint responses.
(University of Waterloo, 2014-02-21)The Dbf4/Cdc7 kinase complex is required for the initiation of DNA replication and promotes this by acting upon members of the Mcm2-7 helicase. In addition to its role in replication, Dbf4/Cdc7 is a target of the S-phase ... -
Characterization of Dissolved Organic Matter and Reduced Sulfur in Coastal Marine and Estuarine Environments: Implications for Protective Effects on Acute Copper Toxicity
(University of Waterloo, 2009-05-13)Copper-induced toxicity in aqueous systems depends on its speciation and bioavailability. Dissolved organic matter (DOM) and reduced sulfur species can complex copper, influencing speciation and decreasing bioavailability. ... -
Characterization of Eukaryotic Translation Initiation Factor 5A isoforms (eIF-5A1 & eIF-5A2) using human cell lines as a model system
(University of Waterloo, 2006)Eukaryotic translation initiation factor 5A (eIF-5A) is the only known cellular protein that contains the post-translationally derived amino acid, hypusine. Initially, eIF-5A was named as a translation initiation factor ...