Browsing Chemistry by Title
Now showing items 334-353 of 826
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Headspace versus Direct Immersion Solid Phase Microextraction in Complex Matrixes: Investigation of Analyte Behavior in Multicomponent Mixtures
(American Chemical Society, 2015-07-21)This work aims to investigate the behavior of analytes in complex mixtures and matrixes with the use of solid-phase microextraction (SPME). Various factors that influence analyte uptake such as coating chemistry, extraction ... -
Hg2+ detection using a phosphorothioate RNA probe adsorbed on graphene oxide and a comparison with thymine-rich DNA
(Royal Society of Chemistry, 2016-06-21)Mercury is a highly toxic heavy metal and many DNA-based biosensors have been recently developed for Hg2+ detection in water. Among them, thymine-rich DNA is the most commonly used for designing Hg2+ sensors. However, the ... -
High Throughput Analysis for On-site Sampling
(University of Waterloo, 2012-12-12)Until recently, multiple SPME fibres could not be automatically evaluated in a single sequence without manual intervention. This drawback had been a critical issue until recently, particularly during the analysis of numerous ... -
High Throughput Sequencing of MicroRNA in Rainbow Trout Plasma, Mucus, and Surrounding Water Following Acute Stress
(Frontiers, 2021-01-13)Circulating plasma microRNAs (miRNAs) are well established as biomarkers of several diseases in humans and have recently been used as indicators of environmental exposures in fish. However, the role of plasma miRNAs in ... -
High throughput solid phase microextraction: A new alternative for analysis of cellular lipidome?
(Elsevier, 2017-02-01)A new SPME method for untargeted lipidomic study of cell line cultures was proposed for the first time. In this study the feasibility to monitor changes in lipid profile after external stimuli was demonstrated and compared ... -
High-resolution infrared emission spectroscopy of diatomic and triatomic metal hydrides
(University of Waterloo, 2006)Several hydrides of Group 2 and 12 elements were generated in the gas phase using an emission source that combines an electrical discharge with a high temperature furnace, and their high-resolution infrared emission spectra ... -
High-resolution laboratory spectroscopy of transient metal-containing molecules
(University of Waterloo, 2007-05-14)Ten gaseous transient metal-containing molecules have been synthesized and studied by high resolution spectroscopy. Transient molecules are molecules with a short lifetime, and they play an important role in chemistry ... -
High-throughput analysis of biological fluids using 96-blade (thin-film) solid phase microextraction system
(University of Waterloo, 2013-01-07)The initial research of this thesis involves the evaluation of different strategies for developing diverse chemistries of highly stable coatings for the automated 96-blade (thin-film) solid phase microextraction (SPME) ... -
A Highly Active RNA-Cleaving DNAzyme with Accelerated Activity by Ethanol and by Freezing
(University of Waterloo, 2018-04-27)DNAzymes are functional DNA molecules with catalytic activities. The EtNa is an example of a RNA-cleaving DNAzyme that catalyzes the cleavage reaction of a phosphodiester bond in the presence of metal ions, such as Na+ or ... -
A highly specific sodium aptamer probed by 2-aminopurine for robust Na+ sensing
(Oxford University Press, 2016-09-20)Sodium is one of the most abundant metals in the environment and in biology, playing critical ecological and physiological roles. Na+ is also the most common buffer salt for nucleic acids research, while its specific ... -
Hillock-free and atomically smooth InSb QWs grown on GaAs substrates by MBE
(Elsevier, 2019-05-01)Comprehensive studies on the surface morphological evolution of AlInSb metamorphic buffers and InSb QWs grown on top were conducted as a function of the GaAs (0 0 1) substrate offcut angles. We confirmed our earlier ... -
How Hot Are Your Ions in Differential Mobility Spectrometry?
(American Chemical Society, 2020-01)Ions can experience significant field-induced heating in a differential mobility cell. To investigate this phenomenon, the fragmentation of several para-substituted benzylpyridinium “thermometer” ions (R = OMe, Me, F, Cl, ... -
HS-SPME-GC-TOFMS Methodology for Verification of Geographical Origin and Authenticity Attributes of Coffee Samples
(University of Waterloo, 2008-02-05)Increasing consumer awareness of food safety issues requires the development of highly sophisticated techniques for the authentication of food commodities. The food products targeted for falsification are either products ... -
Human Steroid Sulfatase: Inhibitor Studies and Photoaffinity Labeling
(University of Waterloo, 2010-09-22)Steroid sulfatase (STS) is considered to be one of the key enzymes contributing to the development of breast cancer. It catalyzes the hydrolysis of inactive sulfated steroids such as estrone sulfate (ES) to inorganic ... -
Hybrid Cathode for All-Solid-State Li-S Batteries
(University of Waterloo, 2021-09-03)Lithium-sulfur (Li-S) battery is one of the most promising energy storage candidates to satisfy the rising demands in multi-functional personal electronics, and the development of electric vehicles due to its high energy ... -
Hybrid Metallic Nanostructures for Bio and Analytical Applications
(University of Waterloo, 2015-01-22)Different hybrid nanoparticles (NPs), including FeM (M=Ni, Au, Pt, Pd) and Fe-biomolecules (biomolecule=glucose oxidase, p53p protein), have been synthesized by a surfactant-free, single-step electrochemical method. FeNi ... -
Hybrid Path Integral Monte Carlo/Molecular Dynamics Approach for the Simulation of Rigid Rotating and Translating Molecules
(University of Waterloo, 2020-01-23)The path integral formulation of quantum statistical mechanics [1] is widely used for formulating the partition function and diverse thermodynamic properties. The basic objective of this thesis is to present the benchmark ... -
Hybrid Transparent Conductive Oxide Nanostructured Materials for Photovoltaic Applications
(University of Waterloo, 2015-10-09)In Ontario, there are great incentives to invest in solar cell research through the Feed-In Tariff program, which has successfully increased the total connected capacity of solar power in Ontario to well over 215 MW. ... -
Hydrogel porosity controlling DNA-directed immobilization of gold nanoparticles revealed by DNA melting and scanning helium ion microscopy
(Royal Society of Chemistry, 2012-04-07)Immobilization of nanomaterials is important for many applications, including sensor development, biomaterials design and catalysis. DNA-directed immobilization has been widely used because of its high specificity and ... -
Hydrogenolysis of Carbon-Carbon Sigma Bonds
(University of Waterloo, 2015-05-22)The modification of benzylic quaternary, tertiary, and secondary carbon centers through Pd-catalyzed hydrogenolysis of Csp3-Csp3 σ bonds is presented. When benzyl Meldrum’s acid derivatives bearing quaternary benzylic ...