Browsing Science (Faculty of) by Title
Now showing items 1557-1576 of 3042
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Iron isotope fractionation in sediments of an oligotrophic freshwater lake
(University of Waterloo, 2015-10-06)In situ iron (Fe) isotope compositions of pore water and solid-bound Fe phases were measured in sediments of an oligotrophic, sulfate-poor freshwater lake (Lake Tantaré, Québec, Canada). Previous work has shown that ... -
Iron Isotope Fractionations Reveal a Finite Bioavailable Fe Pool for Structural Fe(III) Reduction in Nontronite
(American Chemical Society, 2017-08-16)We report on stable Fe isotope fractionation during microbial and chemical reduction of structural Fe(III) in nontronite NAu-1. Fe-56/Fe-54 fractionation factors between aqueous Fe(II) and structural Fe(III) ranged from ... -
Iron oxide nanozyme catalyzed synthesis of fluorescent polydopamine for light-up Zn2+ detection
(Royal Society of Chemistry, 2016-07-29)Fluorescent polydopamine (FPD) is an interesting material with excellent biocompatibility. However, its preparation is currently a lengthy and potentially dangerous process. We herein employ magnetic iron oxide (Fe3O4) ... -
Is blur sensitivity altered in children with progressive myopia?
(Elsevier, 2019-01)School aged children with progressive myopia show large accommodative lags to blur only cue which is suggestive of a large depth of focus (DOF). While DOF measures are lacking in this age group, their blur detection and ... -
Island biogeography theory and the urban landscape: stopover site selection by the silver-haired bat (Lasionycteris noctivagans)
(Canadian Science Publishing, 2022-04)Many migratory bats require forested sites for roosting and foraging along their migration path, but increased urbanization and intensive agricultural practices may reduce the availability of stopover sites. Urban forests ... -
Isoform-specific Roles of Prolyl-Hydroxylases in the Regulation of β-cell Insulin Secretion during Diet-Induced Obesity in Males
(University of Waterloo, 2024-06-13)Type 2 diabetes affects approximately 480 million individuals worldwide and is associated with impaired tissue insulin sensitivity and β-cell dysfunction. Although there has been much research into nutrient-regulated insulin ... -
Isolation and characterization of bacterial phosphorous metabolism genes from complex microbial communities
(University of Waterloo, 2009-10-05)Phosphorous (P) is an essential nutrient, playing a central role in the life of a bacterial cell. It is involved in cellular metabolic pathways, cell signaling and is a component of many of the cell’s macromolecules. Since ... -
Isolation and Characterization of Host Mutations that Suppress the Bacteriophage Lambda (λ) Rex Phenotype
(University of Waterloo, 2015-09-01)The Bacteriophage lambda (λ) T4rII exclusion (Rex) phenotype is defined as the inability of T4rII mutant bacteriophage to form plaques on a lawn of E. coli lysogenized by bacteriophage λ. More than six decades have passed ... -
Isotope hydrology and paleohydrology of the Slave River Delta, NWT
(University of Waterloo, 2010-08-30)Water isotope tracers and multi-proxy paleolimnological approaches are used to characterize the present and past hydrology of the Slave River Delta (SRD), NWT. This research addresses crucial gaps in knowledge about the ... -
Isotope-Inferred Water Balance of Slave River Delta Lakes, NWT, Canada.
(University of Waterloo, 2007-09-27)The use of the stable isotopes, 18O and 2H, has proven to be a valuable tool in determining the importance of various hydrological controls on the modern water balances of Slave River Delta lakes, NWT, Canada. Samples ... -
Isotopic niche use by the invasive mysid Hemimysis anomala in the Laurentian Great Lakes basin
(University of Waterloo, 2013-05-03)Invasive species are a known stressor on aquatic ecosystems, particularly in the waters of the Great Lakes basin. A recent invader, Hemimysis anomala, has had significant impacts on the food webs of Europe, where it invaded ... -
Isotropic-Helicoidal Transition of Semiflexible Polymers Confined to a Spherical Surface
(University of Waterloo, 2009-01-15)A semiflexible polymer confined to a spherical surface is used as a basic model for understanding DNA conformation in restricted space. By means of Monte Carlo simulation for a bead-rod chain generated on a spherical ... -
iTRAQ-based Quantitative Proteomic Analysis of Mammalian Cell Lines
(University of Waterloo, 2018-05-17)High-throughput proteomics approaches have been successfully employed in the inclusive and unbiased characterization of cellular proteome. In this thesis, we are aiming to comprehensively compare changes in proteome ... -
Kinetics of Deliquescence of Ammonium Sulfate Particles
(University of Waterloo, 2008-05-15)The goal of this project was to study the deliquescence kinetics of aerosol particles of atmospheric significance. In the course of this work a novel experimental method was developed, which utilizes the measurement of the ... -
Label-Free Ag+ Detection by Enhancing DNA Sensitized Tb3+ Luminescence
(Multidisciplinary Digital Publishing Institute, 2016-08-26)In this work, the effect of Ag+ on DNA sensitized Tb3+ luminescence was studied initially using the Ag+-specific RNA-cleaving DNAzyme, Ag10c. While we expected to observe luminescence quenching by Ag+, a significant ... -
Lack of Foraging Site Fidelity Between Years by Common Nighthawks (Chordeiles minor)
(University of Notre Dame, 2021-01)Birds in the family Caprimulgidae generally exhibit high nest site fidelity, but it is not known if fidelity extends to foraging sites, especially for Common Nighthawks (Chordeiles minor), which are otherwise one of the ... -
Lack of neuroprotective effects by platelet-derived growth factor against beta-amyloid induced toxicity uncovers a novel hypothesis of Alzheimer's disease pathology
(University of Waterloo, 2012-05-18)Aβ oligomer-induced neurotoxicity has become an important area of therapeutic development in treating Alzheimer’s disease. Platelet-derived growth factor (PDGF) has been shown to be able to protect neurons against several ... -
Lactate Detection Using Non-Enzymatic Catalytic Materials
(University of Waterloo, 2022-04-29)An Anastomotic leak (AL) can be defined as the leakage of gastrointestinal fluids into the abdominal cavity at the site of an anastomosis. It is a post-operative complication that affects thousands of patients annually ... -
Lagrange: A Three-dimensional Analytic Lens Design Method for Spectacles Application
(University of Waterloo, 2014-01-02)Purpose: traditional optical design is a numerical process based on ray tracing theory. The traditional method has the limitation of the application of the spectacle lens because of the necessity of initial configurations ... -
Lake Zooplankton Carbon Sources: The Role Of Terrestrial Inputs And The Effects Of Depth And Taxonomic Composition
(University of Waterloo, 2008-11-28)The relative contribution of allochthonous and autochthonous production in zooplankton nutrition has been of interest since the net heterotrophy of lakes was recognised to be common. I measured the 13C signature of ...