Derivation for Electric Current Regulation Equation of a Gradient Magnetic Field to Control Suspending Magnetic Particles Inside Dialysate Solution

Journal of Heat Transfer ◽

10.1115/1.4037337 ◽

2017 ◽

Vol 140 (1) ◽

Author(s):

Junfeng Lu ◽

Wen-Qiang Lu

Keyword(s):

Magnetic Field ◽

Driving Force ◽

Magnetic Particles ◽

Phase System ◽

Solenoid Coil ◽

Gradient Magnetic Field ◽

Two Phase ◽

Adsorption Performance ◽

Magnetic Adsorption ◽

Dialysate Solution

To design a better adsorption performance in a novel magnetic adsorption device used for hemodialysis (HD), the mechanical properties of magnetic absorbents trapped inside a two-phase system are studied in this paper. A gradient magnetic coil field is assumed to produce the magnetic driving force that balances other hydraulic forces for the adsorbents. For this field, a related winding equation for the solenoid coil is obtained in our previous work; and a complement practical form of the winding equation is derived in this paper. Case studies are also described in this paper to explore the design aspects of the field.

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Thermodynamics of phase equilibrium in solid-liquid and solid-gas systems

Proceedings of the Voronezh State University of Engineering Technologies ◽

10.20914/2310-1202-2021-1-30-35 ◽

2021 ◽

Vol 83 (1) ◽

pp. 30-35

Author(s):

Y. I. Shishatskii ◽

A. A. Derkanosova ◽

S. A. Tolstov

Keyword(s):

Driving Force ◽

Cheese Whey ◽

Extraction Process ◽

Liquid System ◽

Average Concentration ◽

Phase System ◽

Gibbs Equation ◽

Two Phase ◽

Thermodynamic Potentials ◽

Solid Liquid

The thermodynamic equilibrium of a two-phase system is described by the Gibbs equation, which includes state parameters. On the basis of the Gibbs equation and the combined equation of the first and second laws of thermodynamics, thermodynamic potentials are written: internal energy, enthalpy and Gibbs free energy. If the two phases are in equilibrium, then the temperatures, pressures and chemical potentials of these phases are equal to each other. Equalities express the conditions of thermal and mechanical equilibrium, as well as the condition for the absence of a driving force for the transfer of a component across the interface. For a two-phase system, the Gibbs-Duhem equation connects the volume and entropy of 1 mole of the mixture, the content of any component, expressed in mole fractions. Extraction from lupine particles with cheese whey (solid-liquid system) is considered. The driving force of the extraction process in the solid-liquid system is the difference between the concentration of the solvent at the surface of the solid C and its average concentration C0 in the bulk of the solution. The concentration at the interface is usually taken to be equal to the concentration of a saturated solution of Cn, since equilibrium is established rather quickly near the surface of a solid. Then the driving force of the process is expressed as Cn – C0. A curve for the extraction of extractives from lupine with cheese whey was plotted by superimposing low-frequency mechanical vibrations.

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Rounded multi-level microchannels with orifices made in one exposure enable aqueous two-phase system droplet microfluidics

Lab on a Chip ◽

10.1039/c1lc20560a ◽

2011 ◽

Vol 11 (20) ◽

pp. 3551 ◽

Cited By ~ 34

Author(s):

David Lai ◽

John P. Frampton ◽

Hari Sriram ◽

Shuichi Takayama

Keyword(s):

Droplet Microfluidics ◽

Phase System ◽

Two Phase ◽

Aqueous Two Phase System ◽

Multi Level ◽

Made In

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An extracellular polymer at the interface of magnetic bioseparations

Journal of The Royal Society Interface ◽

10.1098/rsif.2014.0743 ◽

2014 ◽

Vol 11 (100) ◽

pp. 20140743 ◽

Cited By ~ 15

Author(s):

Vijaykumar L. Dhadge ◽

Patricia I. Morgado ◽

Filomena Freitas ◽

Maria A. Reis ◽

Ana Azevedo ◽

...

Keyword(s):

Magnetic Separation ◽

Magnetic Particles ◽

Hydrophobic Interactions ◽

Extracellular Polysaccharide ◽

Affinity Constant ◽

Protein Solutions ◽

Phase System ◽

Two Phase ◽

Magnetic Separator ◽

Extracellular Polymer

FucoPol, a fucose-containing extracellular polysaccharide (EPS) produced by bacterium Enterobacter A47 using glycerol as the carbon source, was employed as a coating material for magnetic particles (MPs), which were subsequently functionalized with an artificial ligand for the capture of antibodies. The performance of the modified MPs (MP–EPS-22/8) for antibody purification was investigated using direct magnetic separation alone or combined with an aqueous two-phase system (ATPS) composed of polyethylene glycol (PEG) and dextran. In direct magnetic capturing, and using pure protein solutions of human immunoglobulin G (hIgG) and bovine serum albumin (BSA), MP–EPS-22/8 bound 120 mg hIgG g −1 MPs, whereas with BSA only 10 ± 2 mg BSA g −1 MPs was achieved. The hybrid process combining both the ATPS and magnetic capturing leads to a good performance for partitioning of hIgG in the desired phase as well as recovery by the magnetic separator. The MPs were able to bind 145 mg of hIgG g −1 of particles which is quite high when compared with direct magnetic separation. The theoretical maximum capacity was calculated to be 410 ± 15 mg hIgG adsorbed g −1 MPs with a binding affinity constant of 4.3 × 10 4 M −1 . In multiple extraction steps, the MPs bound 92% of loaded hIgG with a final purity level of 98.5%. The MPs could easily be regenerated, recycled and re-used for five cycles with only minor loss of capacity. FucoPol coating allowed both electrostatic and hydrophobic interactions with the antibody contributing to enhance the specificity for the targeted products.

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THE CALCULATION OF THE EFFECTIVE BULK VISCOSITY OF TWO-PHASE SYSTEM CONSISTING OF LIQUID METAL OF THE WELD POOL AND SOLID PARTICLES REFRACTORY POWDER FILLER MATERIAL

10.21506/j.ponte.2018.2.6 ◽

2018 ◽

Vol 74 (2) ◽

Author(s):

Sergey Donskikh ◽

Semin V. N.

Keyword(s):

Liquid Metal ◽

Weld Pool ◽

Bulk Viscosity ◽

Solid Particles ◽

Filler Material ◽

Phase System ◽

Two Phase ◽

Refractory Powder ◽

Powder Filler

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On the Problem of “Two-Phase” Activated Sludge

Water Science & Technology ◽

10.2166/wst.1991.0185 ◽

1991 ◽

Vol 24 (7) ◽

pp. 59-64 ◽

Cited By ~ 1

Author(s):

R. W. Szetela

Keyword(s):

Activated Sludge ◽

Single Phase ◽

Phase System ◽

Two Phase ◽

Wastewater Treatment Process ◽

Sludge Stabilization ◽

Technological Advantage ◽

In Series ◽

State Models ◽

Activated Sludge Systems

Steady-state models are presented to describe the wastewater treatment process in two activated sludge systems. One of these makes use of a single complete-mix reactor; the other one involves two complete-mix reactors arranged in series. The in-series system is equivalent to what is known as the “two-phase” activated sludge, a concept which is now being launched throughout Poland in conjunction with the PROMLECZ technology under implementation. Analysis of the mathematical models has revealed the following: (1) treatment efficiency, excess sludge production, energy consumption, and the degree of sludge stabilization are identical in the two systems; (2) there exists a technological equivalence of “two-phase” sludge with “single-phase” sludge; (3) the “two-phase” system has no technological advantage over the “single-phase” system.

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Interphase distribution of 2-furylethylenes

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19851642 ◽

1985 ◽

Vol 50 (8) ◽

pp. 1642-1647 ◽

Cited By ~ 2

Author(s):

Štefan Baláž ◽

Anton Kuchár ◽

Ernest Šturdík ◽

Michal Rosenberg ◽

Ladislav Štibrányi ◽

...

Keyword(s):

Partition Coefficient ◽

Partition Coefficients ◽

Transport Rate ◽

Phase System ◽

Two Phase ◽

Interphase Distribution ◽

Distribution Kinetics ◽

System 1 ◽

Kinetics Of

The distribution kinetics of 35 2-furylethylene derivatives in two-phase system 1-octanol-water was investigated. The transport rate parameters in direction water-1-octanol (l1) and backwards (l2) are partition coefficient P = l1/l2 dependent according to equations l1 = logP - log(βP + 1) + const., l2 = -log(βP + 1) + const., const. = -5.600, β = 0.261. Importance of this finding for assesment of distribution of compounds under investigation in biosystems and also the suitability of the presented method for determination of partition coefficients are discussed.

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