A5060131526- NMR spectroscopy and applications
- Advanced NMR Techniques and Applications
- Advanced Neuroimaging Techniques and Applications
- Advanced MRI Techniques and Applications
- Lanthanide and Transition Metal Complexes
- Diffusion Coefficients in Liquids
- Thermodynamic properties of mixtures
- Advanced Battery Materials and Technologies
- Electron Spin Resonance Studies
- Thermal Analysis in Power Transmission
- Material Dynamics and Properties
- Molecular spectroscopy and chirality
- Spectroscopy and Quantum Chemical Studies
- Nanoparticle-Based Drug Delivery
- Lightning and Electromagnetic Phenomena
- Various Chemistry Research Topics
- Pregnancy and preeclampsia studies
- Ionic liquids properties and applications
- Metabolomics and Mass Spectrometry Studies
- Electrochemical Analysis and Applications
- Horticultural and Viticultural Research
- High voltage insulation and dielectric phenomena
- Birth, Development, and Health
- Physiological and biochemical adaptations
- Plant Water Relations and Carbon Dynamics
Western Sydney University
2016-2025
Ingham Institute
2020
Camden and Campbelltown Hospitals
2013-2019
Liverpool Hospital
2019
University Hospital of Umeå
2018
Charles Sturt University
2014-2017
Penrith Community Hospital
2017
Commonwealth Scientific and Industrial Research Organisation
2015
IBM Research - Thomas J. Watson Research Center
2015
IBM (United States)
1992-2014
Translational diffusion is the most fundamental form of transport in chemical and biochemical systems. Pulsed-field gradient nuclear magnetic resonance provides a convenient noninvasive means for measuring translational motion. In this method attenuation echo signal from Hahn spin-echo pulse sequence containing field each τ period used to measure displacement observed spins. present article, physical basis considered detail. Starting Bloch equations terms, (analytical) equation linking spin...
Translational diffusion is the most fundamental form of transport in chemical and biochemical systems. Pulsed-field gradient nuclear magnetic resonance provides a convenient noninvasive means for measuring translational motion. In this method attenuation echo signal from Hahn spin-echo pulse sequence containing field each τ period used to measure displacement observed spins. present article, physical basis considered detail. Starting Bloch equations terms, (analytical) equation linking spin...
In Part 1 of this series, we considered the theoretical basis behind pulsed-field gradient nuclear magnetic resonance method for measuring diffusion. article experimental and practical aspects conducting such experiments are considered, including technical problems involved in production as eddy currents, calibration, internal gradients heterogeneous samples, temperature control. Furthermore, means recognizing preventing or at least minimizing these discussed. A number representative pulse...
In Part 1 of this series, we considered the theoretical basis behind pulsed-field gradient nuclear magnetic resonance method for measuring diffusion. article experimental and practical aspects conducting such experiments are considered, including technical problems involved in production as eddy currents, calibration, internal gradients heterogeneous samples, temperature control. Furthermore, means recognizing preventing or at least minimizing these discussed. A number representative pulse...
The translational self-diffusion coefficients of supercooled water at atmospheric pressure were examined using pulsed-gradient spin−echo NMR diffusion measurements down to 238 K. As the temperature decreased, behavior became distinctly non-Arrhenius. It was found that when plotted in an Arrhenius form well-described by a Vogel−Tamman−Fulcher-type relationship range from 298 about 242 However, fractional power-law-type equation provide better fit extended over entire measured range. Below...
Binary room-temperature ionic liquid (RTIL) samples including a lithium salt were prepared by mixing 1-ethyl-3-methylimidazolium tetrafluoroborate ([emim][BF4]) with LiBF4. The conductivity, viscosity, thermal properties, and ion self-diffusion coefficients in [emim][BF4] the binary [Li][emim][BF4] at six concentrations of LiBF4 ranging from 0.25 to 1.50 M measured various temperatures. individual components, [emim], BF4, Li, using 1H, 19F, 7Li pulsed gradient spin−echo NMR, respectively....
Expression levels of biomarkers are generally unknown at initial diagnosis.The development theranostic probes that do not rely on biomarker availability would expand therapy options for cancer patients, improve patient selection nanomedicine and facilitate treatment inoperable patients or with acquired resistance.Herein, we report the star polymers, also known as nanostars, allow molecular imaging and/or endoradiotherapy based passive targeting via enhanced permeability retention (EPR)...
The solution behavior of lysozyme was studied as a function protein concentration, NaCl pH, and temperature using pulsed-gradient spin−echo NMR diffusion measurements. solutions clearly exhibited nonideal which sensitive to both the salt concentration pH. Lysozyme has an isoelectric point pH 11, it is often overlooked that at normal net positive charge. Since charged species, changes in coefficients were interpreted, considering competing effects salt-mediated interactions (e.g.,...
Abstract Surfactant molecules are amphipathic and posses complicated solution chemistry self‐assembly properties. In addition to being of enormous practical significance, the physical characterization surfactant systems presents a rich area condensed matter physics. This article focuses on application interpretation commonly used NMR approaches for probing these systems. particular, use relaxation, diffusometry and, more briefly, electrophoretic determine characteristics such as micellar...
The associative behavior of aqueous methanol, ethanol, and tert-butyl alcohol solutions at mole fractions ranging from 0 to 1 273, 283, 298 K was examined using PGSE NMR measurements the self-diffusion coefficients alkyl group, water and, depending on exchange rate, hydroxyl protons. results show that has greatest ability stabilize through hydrophobic hydration than methanol or ethanol due more ideal fit group structure water. However, higher concentrations is least able cohesively interact...
The Debye–Hückel–Onsager and Nernst–Einstein equations, which are based on two different conceptual approaches, constitute the most widely used equations for relating ionic conduction to mobility. However, both of these classical (simple) predictive conductivity only at very low salt concentrations. In present work four organic solvent-lithium salt-based electrolytes were measured. These experimental values then contrasted with theoretical calculated using translational diffusion (also known...
The self-diffusion coefficients of the lithium ion, anion, and solvent in electrolytes prepared by dissolving six salts bis(oxalateborate)) γ-butyrolactone (GBL) were measured using pulsed gradient spin-echo nuclear magnetic resonance. ionic conductivity calculated from ion was compared with electrochemically conductivity. In each sample, GBL diffused fastest, followed anion then ion. diffusion cation insensitive to anions. On average solvated about two molecules. hydrodynamic size anions...
Dihydrogen phosphate anions are found to spontaneously associate into anti-electrostatic oligomers via hydrogen bonding interactions at millimolar concentrations in DMSO. Diffusion NMR measurements supported formation of these oligomers, which can be bound by photoswitchable anion receptors form large bridged assemblies approximately three times the volume unbound receptor. Photoisomerization oligomer-bound receptor causes a decrease diffusion coefficient up 16%, corresponding 70% increase...