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Shelukhin V, Antonov A. Flows of Dense Suspensions of Polymer Particles through Oblique Bifurcating Channels: Two Continua Approach. Polymers (Basel) 2022; 14:polym14183880. [PMID: 36146025 PMCID: PMC9506186 DOI: 10.3390/polym14183880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Revised: 09/15/2022] [Accepted: 09/15/2022] [Indexed: 11/16/2022] Open
Abstract
A two-velocity mathematical model is proposed for dense suspension flows through channel bifurcations. Equations agree with thermodynamic laws and they are suitable for both heavy and light particles. The pulsatile mode of injection of particles is considered. In the 2D-case, we address the issue of partitioning particles and study how a loss of particles into the side branch depends on the bifurcation angle. A qualitative agreement with experiment data are established. We capture the Zweifach-Fung effect. We treat polymer particles as a phase enjoying the rheology of the Bingham viscoplastic material. We prove that the polymer particle distribution between two branches correlates with the averaged-in-time Bingham number in these branches.
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Al-aqbi ZT, Albukhaty S, Zarzoor AM, Sulaiman GM, Khalil KAA, Belali T, Soliman MTA. A Novel Microfluidic Device for Blood Plasma Filtration. MICROMACHINES 2021; 12:336. [PMID: 33810143 PMCID: PMC8004888 DOI: 10.3390/mi12030336] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 03/18/2021] [Accepted: 03/19/2021] [Indexed: 12/28/2022]
Abstract
The use of whole blood and some biological specimens, such as urine, saliva, and seminal fluid are limited in clinical laboratory analysis due to the interference of proteins with other small molecules in the matrix and blood cells with optical detection methods. Previously, we developed a microfluidic device featuring an electrokinetic size and mobility trap (SMT) for on-chip extract, concentrate, and separate small molecules from a biological sample like whole blood. The device was used to on-chip filtrate the whole blood from the blood cells and plasma proteins and then on-chip extract and separate the aminoglycoside antibiotic drugs within 3 min. Herein, a novel microfluidic device featuring a nano-junction similar to those reported in the previous work formed by dielectric breakdown was developed for on-chip filtration and out-chip collection of blood plasma with a high extraction yield of 62% within less than 5 min. The filtered plasma was analyzed using our previous device to show the ability of this new device to remove blood cells and plasma proteins. The filtration device shows a high yield of plasma allowing it to detect a low concentration of analytes from the whole blood.
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Affiliation(s)
- Zaidon T. Al-aqbi
- College of Agriculture, University of Misan, Al-Amara, Misan 62001, Iraq
| | - Salim Albukhaty
- Department of Chemistry, College of Science, University of Misan, Maysan 62001, Iraq
| | | | - Ghassan M. Sulaiman
- Department of Applied Sciences, University of Technology, Baghdad 10066, Iraq;
| | - Khalil A. A. Khalil
- Department of Medical Laboratory Sciences, Faculty of Applied Medical Sciences, University of Bisha, 255, Al Nakhil, Bisha 67714, Saudi Arabia; (K.A.A.K.); (T.B.); (M.T.A.S.)
- Department of Medical Laboratory Sciences, Faculty of Medicine and Health Sciences, University of Hodeidah, Hodeidah 3114, Yemen
| | - Tareg Belali
- Department of Medical Laboratory Sciences, Faculty of Applied Medical Sciences, University of Bisha, 255, Al Nakhil, Bisha 67714, Saudi Arabia; (K.A.A.K.); (T.B.); (M.T.A.S.)
| | - Mohamed T. A. Soliman
- Department of Medical Laboratory Sciences, Faculty of Applied Medical Sciences, University of Bisha, 255, Al Nakhil, Bisha 67714, Saudi Arabia; (K.A.A.K.); (T.B.); (M.T.A.S.)
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Mauk MG, Song J, Liu C, Bau HH. Simple Approaches to Minimally-Instrumented, Microfluidic-Based Point-of-Care Nucleic Acid Amplification Tests. BIOSENSORS 2018; 8:E17. [PMID: 29495424 PMCID: PMC5872065 DOI: 10.3390/bios8010017] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/05/2018] [Revised: 01/29/2018] [Accepted: 02/09/2018] [Indexed: 01/10/2023]
Abstract
Designs and applications of microfluidics-based devices for molecular diagnostics (Nucleic Acid Amplification Tests, NAATs) in infectious disease testing are reviewed, with emphasis on minimally instrumented, point-of-care (POC) tests for resource-limited settings. Microfluidic cartridges ('chips') that combine solid-phase nucleic acid extraction; isothermal enzymatic nucleic acid amplification; pre-stored, paraffin-encapsulated lyophilized reagents; and real-time or endpoint optical detection are described. These chips can be used with a companion module for separating plasma from blood through a combined sedimentation-filtration effect. Three reporter types: Fluorescence, colorimetric dyes, and bioluminescence; and a new paradigm for end-point detection based on a diffusion-reaction column are compared. Multiplexing (parallel amplification and detection of multiple targets) is demonstrated. Low-cost detection and added functionality (data analysis, control, communication) can be realized using a cellphone platform with the chip. Some related and similar-purposed approaches by others are surveyed.
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Affiliation(s)
- Michael G Mauk
- Mechanical Engineering and Applied Mechanics (MEAM), School of Engineering and Applied Science, University of Pennsylvania, Towne Building, 220 33rd Street, Philadelphia, PA 19104, USA.
| | - Jinzhao Song
- Mechanical Engineering and Applied Mechanics (MEAM), School of Engineering and Applied Science, University of Pennsylvania, Towne Building, 220 33rd Street, Philadelphia, PA 19104, USA.
| | - Changchun Liu
- Mechanical Engineering and Applied Mechanics (MEAM), School of Engineering and Applied Science, University of Pennsylvania, Towne Building, 220 33rd Street, Philadelphia, PA 19104, USA.
| | - Haim H Bau
- Mechanical Engineering and Applied Mechanics (MEAM), School of Engineering and Applied Science, University of Pennsylvania, Towne Building, 220 33rd Street, Philadelphia, PA 19104, USA.
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Nivedita N, Papautsky I. Continuous separation of blood cells in spiral microfluidic devices. BIOMICROFLUIDICS 2013; 7:54101. [PMID: 24404064 PMCID: PMC3779264 DOI: 10.1063/1.4819275] [Citation(s) in RCA: 130] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2013] [Accepted: 08/09/2013] [Indexed: 05/04/2023]
Abstract
Blood cell sorting is critical to sample preparation for both clinical diagnosis and therapeutic research. The spiral inertial microfluidic devices can achieve label-free, continuous separation of cell mixtures with high throughput and efficiency. The devices utilize hydrodynamic forces acting on cells within laminar flow, coupled with rotational Dean drag due to curvilinear microchannel geometry. Here, we report on optimized Archimedean spiral devices to achieve cell separation in less than 8 cm of downstream focusing length. These improved devices are small in size (<1 in.(2)), exhibit high separation efficiency (∼95%), and high throughput with rates up to 1 × 10(6) cells per minute. These device concepts offer a path towards possible development of a lab-on-chip for point-of-care blood analysis with high efficiency, low cost, and reduced analysis time.
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Affiliation(s)
- Nivedita Nivedita
- BioMicroSystems Lab, School of Electronic and Computing Systems, University of Cincinnati, Cincinnati, Ohio 45221, USA
| | - Ian Papautsky
- BioMicroSystems Lab, School of Electronic and Computing Systems, University of Cincinnati, Cincinnati, Ohio 45221, USA
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