A5056737263- NMR spectroscopy and applications
- Advanced MRI Techniques and Applications
- Groundwater flow and contamination studies
- Lattice Boltzmann Simulation Studies
- Advanced Neuroimaging Techniques and Applications
- Hydrocarbon exploration and reservoir analysis
- Material Dynamics and Properties
- Advanced NMR Techniques and Applications
- Enhanced Oil Recovery Techniques
- Electrostatics and Colloid Interactions
- Rheology and Fluid Dynamics Studies
- Microfluidic and Capillary Electrophoresis Applications
- Heat and Mass Transfer in Porous Media
- Seismic Imaging and Inversion Techniques
- Hydraulic Fracturing and Reservoir Analysis
- Proteins in Food Systems
- CO2 Sequestration and Geologic Interactions
- Methane Hydrates and Related Phenomena
- Granular flow and fluidized beds
- Electrical and Bioimpedance Tomography
- PI3K/AKT/mTOR signaling in cancer
- Galectins and Cancer Biology
- Innovative Microfluidic and Catalytic Techniques Innovation
- Phase Equilibria and Thermodynamics
- Fluid Dynamics and Mixing
Montana State University
2014-2024
ORCID
2020
MacDiarmid Institute for Advanced Materials and Nanotechnology
2018
Victoria University of Wellington
2018
Siberian Branch of the Russian Academy of Sciences
2008
International Tomography Center
2008
Boreskov Institute of Catalysis
2008
Novosibirsk State University
2008
Massey University
1994-2003
New Mexico Resonance
2003
It has recently been proposed, on the basis of a theoretical analysis, that folding mucosa provides significant component airway stiffness. The model predicted stiffness an was directly related to number epithelial folds developed. In this study we examine possibility pattern is determined by physical requirements membrane must stay within boundary smooth muscle wall, submucosal mass constant, and strain energy minimum possible geometric constraints. Model predictions are compared with...
The use of pulsed magnetic field gradients to encode spin magnetization for position or positional displacement leads a variety spatial coherences in the phases, each coherence being manifest characteristic diffraction pattern, whether k-space q-space. These phenomena, which are sensitive different temporal moments gradient waveform, range from original Mansfield–Grannell diffraction, through diffusive and flow patterns arise owing Taylor dispersion heterogeneous velocity field. We describe...
Magnetic resonance measurements of the transition from normal to anomalous hydrodynamic dispersion in porous media due biological activity are presented. Fractional advection-diffusion equations shown provide models for measured impact biofilm growth on transport dynamics.
We present an experimental and numerical study of immiscible two-phase flow Newtonian fluids in three-dimensional (3D) porous media to find the relationship between volumetric rate (Q) total pressure difference ( $$\Delta P$$ ) steady state. show that regime where capillary forces compete with viscous forces, distribution barriers at interfaces effectively creates a yield threshold $$P_t$$ ), making reminiscent Bingham viscoplastic fluid medium. In this regime, Q depends quadratically on...
Microbially induced calcite precipitation (MICP) has been widely researched recently due to its relevance for subsurface engineering applications including sealing leakage pathways and permeability modification. These of MICP are inherently difficult monitor nondestructively in time space. Nuclear magnetic resonance (NMR) can characterize the pore size distributions, porosity, formations. This investigation used a low-field NMR well-logging probe sand-filled bioreactor, measuring signal...
We have used pulsed gradient spin echo (PGSE) NMR to measure longitudinal displacements of octane molecules undergoing Poiseuille flow in a 150 microm diameter pipe, accessing time scales which approach the Taylor dispersion limit. monitor change displacement distribution occurs as Brownian motion sample an increasing proportion ensemble streamlines, observing effects wall collisions and gradual transition propagator from Taylor-Aris behavior. The further use double PGSE sequence allows...
Biofilm growth in porous media is difficult to study non-invasively due the opaqueness and heterogeneity of systems. Magnetic resonance utilized water dynamics within media. Displacement-relaxation correlation experiments were performed on fluid flow during biofilm a model mono-dispersed polystyrene beads. The spin-spin T2 magnetic relaxation distinguishes between phase bulk water-biopolymer interactions present biofilm, are measured using PGSE NMR experiments. By correlating these two...
Flow in porous media and the resultant hydrodynamics are important fields including but not limited to hydrology, chemical, medical petroleum industries. The observation understanding of critical design optimal utilization media, such as those seen trickle-bed reactors, filters, subsurface flows carbon sequestration. Magnetic resonance (MR) provides for a non-invasive technique that can probe on pore bulk scale lengths; many previous works have characterized fully saturated while rapid MR...
Abstract Aerobic granular sludge (AGS) technology allows simultaneous nitrogen, phosphorus, and carbon removal in compact wastewater treatment processes. To operate, design, model AGS reactors, it is essential to properly understand the diffusive transport within granules. In this study, mass transfer full‐scale lab‐scale was characterized with nuclear magnetic resonance (NMR) methods. Self‐diffusion coefficients of water inside granules were determined pulsed‐field gradient NMR, while...
Summary: Two new compounds inhibited the increase of phage when two phages Pseudomonas pyocyanea were grown on an indicator strain. These also appearance iridescence in a lysogenic strain this organism. One iridescent showed rise titre at 1 ½-2 hr., which corresponded to latent period it acted Both these increases by compounds. This 4 hr. but was unaffected The final culture not affected significantly, unlike complete and permanent suppression free Cultures filtrates three strains Ps. great...
Nuclear magnetic resonance (NMR) is a noninvasive and nondestructive tool able to access several observable quantities in biofilms such as chemical composition, diffusion, macroscale structure transport. Pulsed gradient spin echo (PGSE) NMR techniques were used measure spectrally resolved biomacromolecular diffusion biofilm biomass, extending previous research on biofilms. The dominant free water signal was nulled using an inversion recovery modification of the traditional PGSE technique...
Abstract Mass transfer in biofilms is determined by diffusion. Different mostly invasive approaches have been used to measure diffusion coefficients biofilms, however, data on heterogeneous biomass under realistic conditions still missing. To non‐invasively elucidate fluid–structure interactions complex multispecies pulsed field gradient‐nuclear magnetic resonance (PFG‐NMR) was applied the water five different types of aggregates: one type sludge flocs, two biofilm, and granules. Data...