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- Filtration (2)
- Ultrasonic processing (2)
- Acoustics (1)
- Adsorption (1)
- Bioseparations (1)
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- Blood flow (1)
- Cell separations (1)
- Delayed enhancement; ischemic heart disease; magnetic resonance imaging; myocardial viability (1)
- Fermentation (1)
- Field-flow fractionation (1)
- Ischemic heart disease; Left ventricular function; Wall thickening; Circumferential strain; Delayed enhancement MRI; HARP (1)
- Lactic acid (1)
- Magnetic resonance imaging (1)
- Mathematical modeling (1)
- Molecular sieves (1)
- Particle (1)
- Particle separation (1)
- Porous media (1)
- Separations (1)
- Trajectory analysis (1)
- Velocity measurement (1)
Articles 1 - 7 of 7
Full-Text Articles in Engineering
Adsorption Of Lactic Acid From Fermentation Broth And Aqueous Solutions On Zeolite Molecular Sieves, Isam H. Aljundi, Joanne M. Belovich, Orhan Talu
Adsorption Of Lactic Acid From Fermentation Broth And Aqueous Solutions On Zeolite Molecular Sieves, Isam H. Aljundi, Joanne M. Belovich, Orhan Talu
Chemical & Biomedical Engineering Faculty Publications
The recovery of lactic acid from fermentation broth and aqueous solutions was studied by adsorption on Silicalite molecular sieves. Batch experiments were used to measure the adsorption isotherms of the lactic acid on Silicalite. A linear correlation was found for both solutions. Silicalite showed a higher adsorptive capacity in the case of the aqueous solution than that of the fermentation broth. Henry’s constants were estimated as Formula Not Shown and Formula Not Shown for the aqueous and broth solutions, respectively. The effect of temperature on adsorption was also studied in batch mode. Henry’s constant dependency on …
Single-Collector Experiments And Modeling Of Acoustically Aided Mesh Filtration, Michael T. Grossner, Donald L. Feke, Joanne M. Belovich
Single-Collector Experiments And Modeling Of Acoustically Aided Mesh Filtration, Michael T. Grossner, Donald L. Feke, Joanne M. Belovich
Chemical & Biomedical Engineering Faculty Publications
A model for the motion of particles driven by acoustic and hydrodynamic effects in the vicinity of a cylindrical collector has been previously reported. This trajectory model was developed to describe the essential physics that underlies an ultrasonically aided particle-filtration process in which a porous mesh is used to capture particles two orders of magnitude smaller than the pore size. To validate this trajectory model, experiments were performed to elucidate the detailed motion of particles in the neighborhood of a single cylindrical collector. Images of 54-μm-diameter polystyrene particles in aqueous suspension responding to acoustic and hydrodynamic forces were …
Transport Analysis And Model For The Performance Of An Ultrasonically Enhanced Filtration Process, Michael T. Grossner, Joanne M. Belovich, Donald L. Feke
Transport Analysis And Model For The Performance Of An Ultrasonically Enhanced Filtration Process, Michael T. Grossner, Joanne M. Belovich, Donald L. Feke
Chemical & Biomedical Engineering Faculty Publications
This paper presents an analysis of a filtration technique that uses ultrasound to aid the collection of small particles (tens of microns in diameter) from suspension. In this method, particles are retained within a porous mesh that is subjected to a resonant ultrasonic field, even though the pore size of the mesh is two orders of magnitude greater than the particle diameter. The role of acoustic forces in driving the retention phenomena has previously been studied on a micro-scale, which included modeling and experimental verification of particle motion and trapping near a single element of the mesh. Here, we build …
Blood Flow Measurements With Magnetic Resonance Phase Velocity Mapping, George P. Chatzimavroudis
Blood Flow Measurements With Magnetic Resonance Phase Velocity Mapping, George P. Chatzimavroudis
Chemical & Biomedical Engineering Faculty Publications
Magnetic resonance (MR) phase velocity mapping (PVM) is a non-invasive technique that can measure the flow velocity in any spatial direction in an imaging slice. This technique has wide application in the clinical field in quantifying blood flow, as well as in non-biomedical areas. This review describes the value and/or potential of MR PVM as a diagnostic/monitoring technique in heart valve regurgitation and in the total cavo-pulmonary connection. A single slice placed in the aortic root can accurately quantify the aortic regurgitant volume. A multi-slice control volume method has high potential for the quantification of the mitral regurgitant volume. …
Segmentation Of Non-Viable Myocardium In Delayed Enhancement Magnetic Resonance Images, Arunark Kolipaka, George P. Chatzimavroudis, Richard D. White, Thomas P. O’Donnell, Randolph M. Setser
Segmentation Of Non-Viable Myocardium In Delayed Enhancement Magnetic Resonance Images, Arunark Kolipaka, George P. Chatzimavroudis, Richard D. White, Thomas P. O’Donnell, Randolph M. Setser
Chemical & Biomedical Engineering Faculty Publications
Purpose: To evaluate six algorithms for segmenting non-viable left ventricular (LV) myocardium in delayed enhancement (DE) magnetic resonance imaging (MRI). Methods: Twenty-three patients with known chronic ischemic heart disease underwent DE-MRI. DE images were first manually thresholded using an interactive region-filling tool to isolate non-viable myocardium. Then, six thresholding algorithms, based on the image intensity characteristics of either LV blood pool (BP), viable LV myocardium, or both, were applied to each image. For the Mean−2SDBP algorithm, thresholds were equal to the mean BP intensity minus twice its standard deviation. For the Mean+2SDSemi, Mean+3SDSemi, Mean+2SDAuto …
Fractionation Of Cell Mixtures Using Acoustic And Laminar Flow Fields, Manoj Kumar, Donald L. Feke, Joanne M. Belovich
Fractionation Of Cell Mixtures Using Acoustic And Laminar Flow Fields, Manoj Kumar, Donald L. Feke, Joanne M. Belovich
Chemical & Biomedical Engineering Faculty Publications
A fractionation method applicable to different populations of cells in a suspension is reported. The separation was accomplished by subjecting the suspension to a resonant ultrasonic field and a laminar flow field propagating in orthogonal directions within a thin, rectangular chamber. Steady, laminar flow transports the cell suspension along the chamber, while the ultrasonic field causes the suspended cells to migrate to the mid-plane of the chamber at rates related to their size and physical properties. A thin flow splitter positioned near the outlet divides the effluent cell suspension into two product streams, thereby allowing cells that respond faster to …
Relationship Between The Extent Of Non-Viable Myocardium And Regional Left Ventricular Function In Chronic Ischemic Heart Disease, Arunark Kolipaka, George P. Chatzimavroudis, Richard D. White, Michael L. Lieber, Randolph M. Setser
Relationship Between The Extent Of Non-Viable Myocardium And Regional Left Ventricular Function In Chronic Ischemic Heart Disease, Arunark Kolipaka, George P. Chatzimavroudis, Richard D. White, Michael L. Lieber, Randolph M. Setser
Chemical & Biomedical Engineering Faculty Publications
Purpose. To define the relationship between left ventricular (LV) regional contractile function and the extent of myocardial scar in patients with chronic ischemic heart disease and multi-vessel coronary artery disease. Methods. Twenty-three patients with chronic ischemic heart disease and 5 healthy volunteers underwent magnetic resonance imaging (MRI). In patients, the relative area ( Percent Scar) and transmural extent (Transmurality) of myocardial infarction were computed from short-axis delayed enhancement images. In each image, myocardial segments were categorized based on the extent of infarction they contained, with 6 categories each for Percent Scar and Transmurality: normal, from healthy volunteers; and 0%; 1–25%, …