Browsing Science (Faculty of) by Title
Now showing items 745-764 of 3015
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Dissecting the effect of anions on Hg2+ detection using a FRET based DNA probe
(Royal Society of Chemistry, 2012-08-07)Many biosensors have been developed to detect Hg2+ using thymine-rich DNA. While sensor response to various cations is often studied to demonstrate selectivity, the effect of anions has been largely overlooked. Anions may ... -
Dissociation and Degradation of Thiol-Modified DNA on Gold Nanoparticles in Aqueous and Organic Solvents
(American Chemical Society, 2011-05-17)Gold nanoparticles functionalized with thiol-modified DNA have been widely used in making various nanostructures, colorimetric biosensors, and drug delivery vehicles. Over the past 15 years, significant progress has been ... -
Dissolved inorganic carbon and alkalinity fluxes from coastal marine sediments: model estimates for different shelf environments and sensitivity to global change
(European Geosciences Union, 2013-01-24)We present a one-dimensional reactive transport model to estimate benthic fluxes of dissolved inorganic carbon (DIC) and alkalinity (AT) from coastal marine sediments. The model incorporates the transport processes of ... -
Dissolved inorganic nitrogen cycling in a river receiving wastewater: the response to changes in wastewater treatment effluent
(University of Waterloo, 2016-01-27)Nitrogen is an essential element for all life forms, but when in excess in an aquatic ecosystem, it can cause an imbalance in the trophic status. A significant amount of nitrogen is released into the environment by wastewater ... -
Dissolved Organic Matter in the Anthropogenically Impacted Grand River and Natural Burnt River Watersheds
(University of Waterloo, 2012-01-03)Dissolved organic carbon (DOM) is one of the largest cycled organic carbon pools on Earth and an important biogeochemical factor in aquatic systems. DOM can act as an energy source for microorganisms, alter the depth of ... -
Dissolved Organic Matter in the Canadian Arctic & Sub-Arctic: Importance of DOM Quality & Quantity in a Warming Climate
(University of Waterloo, 2019-08-28)Dissolved organic matter (DOM) is a ubiquitous component of aquatic and terrestrial systems and an important constituent that can influence aquatic health and drinking water quality. For instance, DOM can act as an important ... -
Dissolved Oxygen Dynamics in the Dunnville Marsh on the Grand River, Ontario, Canada
(University of Waterloo, 2009-02-19)Dissolved oxygen (DO) is one of the most important environmental factors necessary to sustain aquatic life. The Southern Grand River is characterized with extensive marshes. This study focuses on the Dunnville Marsh in ... -
Distinction of Individual Lanthanide Ions with a DNAzyme Beacon Array
(American Chemical Society, 2016-06-24)Developing chemical probes to distinguish each lanthanide ion is a long-standing challenge. Aside from its analytical applications, solving this problem will also enhance our knowledge in metal ligand design. Using in vitro ... -
Distribution and Function of Soil Thaumarchaeota
(University of Waterloo, 2018-08-17)Despite the importance of ammonia-oxidizing archaea (AOA; Thaumarchaeota) to soil nitrification (Chapter 1), their biogeography in terrestrial environments and relative contributions to nitrification remain unclear. ... -
The distribution of Dreissena and other benthic invertebrates in Lake Erie, 2002.
(University of Waterloo, 2012-02-22)A lake-wide benthic survey of Lake Erie during summer 2002 indicated that Dreissena bugensis is the dominant dreissenid in Lake Erie, especially in the east basin where this species was found at every station but no Dreissena ... -
Distribution, diversity and antimicrobial resistance of Salmonella enterica isolated from urban and rural streams
(University of Waterloo, 2011-08-10)This study presents the spatial and temporal variability of Salmonella enterica in urban and rural streams in a model watershed (Grand River watershed, Ontario, Canada), and examines the antimicrobial resistance (AMR) and ... -
The diversity and composition of benthic macroinvertebrate assemblages in streams in the Mackenzie River system, Northwest Territories
(University of Waterloo, 2010-01-22)Impending natural resources development and concern about the effects of climate change have spurred increased efforts to study and monitor aquatic habitats in the Mackenzie River system. As part of Environment Canada’s ... -
Diversity of Viral Communities in a Northern Temperate Lake through Metagenomics
(University of Waterloo, 2023-04-05)Viruses in oceanic environments play pivotal roles in regulating nutrient transfer and increasing rates of carbon transport. They have also been implicated in the regulation of micro-organism community dynamics through ... -
DNA Adsorption by Indium Tin Oxide (ITO) Nanoparticles
(American Chemical Society, 2015-01-13)The high conductivity and optical transparency of indium tin oxide (ITO) has made it a popular material in the electronic industry. Recently, its application in biosensors is also explored. To understand its biointerface ... -
DNA adsorption by magnetic iron oxide nanoparticles and its application for arsenate detection
(Royal Society of Chemistry, 2014-05-01)Iron oxide nanoparticles adsorb fluorescently labeled DNA oligonucleotides via the backbone phosphate and quench fluorescence. Arsenate displaces adsorbed DNA to increase fluorescence, allowing detection of arsenate down ... -
DNA Adsorption by ZnO Nanoparticles near Its Solubility Limit: Implications for DNA Fluorescence Quenching and DNAzyme Activity Assays
(American Chemical Society, 2016-06-07)Zinc oxide (ZnO) is a highly important material, and Zn2+ is a key metal ion in biology. ZnO and Zn2+ interconvert via dissolution and hydrolysis/condensation. In this work, we explore their interactions with DNA, which ... -
DNA Adsorption, Desorption, and Fluorescence Quenching by Graphene Oxide and Related Analytical Application
(University of Waterloo, 2011-09-20)Graphene is a single layer of graphite with many unique mechanical, electrical, and optical properties. In addition, graphene is also known to adsorb wide range of biomolecules including single-stranded DNA. On the other ... -
DNA and Hydrogels for Sensing and Binding Purine Nucleosides
(University of Waterloo, 2021-08-27)Purine nucleosides, such as adenosine and guanosine, are important biomolecules to regulate physiological functions, including maintain heart and brain health, exert inflammatory responses, and take part in metabolisms. ... -
DNA and Metal Ion Mediated Modification of Nanomaterials
(University of Waterloo, 2021-09-01)DNA-modified nanomaterials have been applied in diverse areas such as biosensing, catalysis, drug delivery, and biomedical diagnostics. Metal ion mediated DNA conjugation is an important strategy for the construction of ... -
DNA duplex stabilization in crowded polyanion solutions
(Royal Society of Chemistry, 2013-02-14)The melting temperature of duplex DNA is much higher in polyanions than in non-ionic polymers with similar ionic strength, suggesting an additional electrostatic contribution on top of the excluded volume effect.