Browsing Chemistry by Title
Now showing items 519-538 of 839
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New Calibration Approaches in Solid Phase Microextraction for On-Site Analysis
(University of Waterloo, 2004)Calibration methods for quantitative on-site sampling using solid phase microextraction (SPME) were developed based on diffusion mass transfer theory. This was investigated using adsorptive polydimethylsiloxane/divinylbenzene ... -
New Generation of Solid-Phase Microextraction Coatings for Complementary Separation Approaches: A Step toward Comprehensive Metabolomics and Multiresidue Analyses in Complex Matrices
(American Chemical Society, 2017-04-04)In this work, a new generation of solid-phase microextraction (SPME) coatings based on polytetrafluoro-ethylene amorphous fluoroplastics (PTFE AF 2400) as a particle binder is presented. The developed coating was tested ... -
A New Na(+)-specific DNAzyme Mutant from in Vitro Selection
(University of Waterloo, 2017-09-08)Sodium is one of the most ubiquitous metal ions in both intracellular and extracellular fluids. Many fluorescent sensors have been designed to measure Na+ concentrations. However, Na+ binding to biomolecules such as DNA ... -
A New Na+-Dependent RNA-Cleaving DNAzyme with over 1000-fold Rate Acceleration by Ethanol
(Wiley, 2016-01-15)Enzymes working in organic solvents are important for analytical chemistry, catalysis, and mechanistic studies. Although a few protein enzymes are highly active in organic solvents, little is known regarding nucleic ... -
New PNHN Pincer-Type Ligands and Their Complexes for Transfer Hydrogenation
(University of Waterloo, 2009-08-28)The ligand tBu2PC2H4NHCH2Py (PNHN) was synthesized starting from 2-pyridinecarboxaldehyde and 2-chloroethanamine. Initial attempts for coordination of the PNHN ligand to a metal center was performed using [IrCl(COE)2]2, ... -
New strategies for analysis of particulate loaded water
(University of Waterloo, 2016-05-16)This thesis describes the application of thin film solid phase microextraction (TF-SPME) for monitoring of time weighted average (TWA) concentrations and for investigating partitioning of UV filters and biocides in aquatic ... -
New Structure Types among Copper Chalcogenides by Mixing Tellurium with Sulfur or Selenium
(University of Waterloo, 2010-09-30)There is evidence for the existence of non-classical bonding in several binary antimonides, selenides, and tellurides. Owing to such non-classical bonding, some of these solid materials exhibit exciting semiconducting and ... -
Next Generation Li-S and Li-O2 Batteries based on Electrode and Electrolyte Design
(University of Waterloo, 2022-01-05)Decoupling our reliance on fossil fuel as the primary energy source emphasizes battery technology to store intermittent renewable energy such as solar and wind for sectors including grid energy storage, electric transportation, ... -
Ni₀.₀₅Mo₃Sb₅.₄Te₁.₆ Based Thermoelectric Nanocomposites
(University of Waterloo, 2016-05-04)Thermoelectric (TE) materials have the capability to convert thermal energy into useful electrical energy. Sustainable energy production and its utilization are among the many challenges that humankind is facing today. ... -
NMR Studies of Protein and Peptide Structure and Dynamics
(University of Waterloo, 2016-04-18)Calmodulin (CaM) is a small, acidic cytosolic calcium binding protein that responds to increases in intracellular Ca2+ concentrations. It is proposed to be involved in binding to and regulating over 300 functionally and ... -
NMR Study of Calmodulin’s Interaction with Inducible Nitric Oxide Synthase
(University of Waterloo, 2010-01-22)The increase of calcium in the cell can induce cellular functions such as fertilization, cell division and cell communication. Calcium (Ca2+) carries out these processes through proteins called calcium sensors. An important ... -
Noble Gas Collision Induced Vibrational Relaxation of (v=1) para-H2
(University of Waterloo, 2001)Close coupling scattering calculations have been conducted for the para spin modification of H<sub>2</sub>-{He, Ne and Ar}. The XC(fit) potential energy surfaces for H<sub>2</sub>-Ne and H<sub>2</sub>-Ar have been used ... -
Nonamphiphilic Assembly of Metal Carbonyl Complexes: Chemical Structure, Kinetics, and Hydrophobic Effect
(University of Waterloo, 2018-08-30)Self-assembly is an effective approach for the synthesis of various nanostructures. Assembly of amphiphilic molecules has been well developed, which are mostly thermodynamic controlled. Although the importance of kinetics ... -
Novel Applications of the Waterloo Membrane Sampler (WMS) in Volatile Organic Compound Sampling from Different Environmental Matrices
(University of Waterloo, 2013-05-28)The Waterloo Membrane Sampler (WMS) is a polydimethylsiloxane (PDMS)-based permeation passive sampler developed at the University of Waterloo. This sampler has found numerous applications in the sampling of volatile organic ... -
Novel High Voltage Electrodes for Li-ion Batteries
(University of Waterloo, 2013-08-30)An alternate family of “high” voltage (where the equilibrium voltage lies between 3.6 V and 4.2 V) polyanion cathode materials is reported in this thesis with the objective of improving specific energy density (Wh/kg) and ... -
Nucleotide coordination with 14 lanthanides studied by isothermal titration calorimetry
(Elsevier, 2017-06-09)With their hydrolytic, optical and magnetic properties, lanthanide ions (Ln3+) are versatile probes for nucleic acids. In addition, nucleotide-coordinated Ln3+ ions form useful nanoparticles. However, the thermodynamic ... -
Numerical Modeling of Solid-Phase Microextraction: Binding Matrix Effect on Equilibrium Time
(American Chemical Society, 2015-09-07)Solid-phase microextraction (SPME) is a well-known sampling and sample preparation technique used for a wide variety of analytical applications. As there are various complex processes taking place at the time of extraction ... -
Numerical Modeling of Solid-Phase Microextraction: Binding Matrix Effect on Equilibrium Time
(American Chemical Society, 2015-10-06)Solid-phase microextraction (SPME) is a well-known sampling and sample preparation technique used for a wide variety of analytical applications. As there are various complex processes taking place at the time of extraction ... -
Numerical simulation and experimental validation of calibrant-loaded extraction phase standardization approach
(American Chemical Society, 2016-08-10)We present the kinetics of calibrant release and analyte uptake between the sample and calibrant-loaded extraction phase, CL-EP with a finite-element analysis (FEA) using COMSOL Multiphysics® software package. Effect of ... -
Numerical Simulation and Experimental Validation of Calibrant-Loaded Extraction Phase Standardization Approach
(American Chemical Society, 2016-09-06)We present the kinetics of calibrant release and analyte uptake between the sample and calibrant-loaded extraction phase, CL-EP, with a finite-element analysis (FEA) using COMSOL Multiphysics software package. Effect of ...