Modelling of flow processes of the structured two-phase disperse systems (solid phase–liquid medium)

2007 ◽  
Vol 134-135 ◽  
pp. 249-267 ◽  
Author(s):  
N.B. Uriev ◽  
I.V. Kuchin
Keyword(s):  
Liquid Medium ◽  
Solid Phase ◽  
Disperse Systems ◽  
Two Phase ◽  
Flow Processes ◽  
Phase Liquid

scholarly journals Cultivation System Using Glass Beads Immersed in Liquid Medium Facilitates Studies of Streptomyces Differentiation

2005 ◽  
Vol 71 (6) ◽  
pp. 2848-2852 ◽  
Author(s):  
Liem D. Nguyen ◽  
Ladislava Kalachová ◽  
Jana Novotná ◽  
Martin Holub ◽  
Olga Kofroňová ◽  
...  
Keyword(s):  
Liquid Medium ◽  
Solid Phase ◽  
Morphological Differentiation ◽  
Glass Beads ◽  
Morphological Development ◽  
Natural Habitats ◽  
Two Phase ◽  
Cultivation System ◽  
Soil Clay ◽  
Posttranslation Modifications

ABSTRACT A two-phase cultivation system was developed which will enable studies of streptomycete differentiation by molecular biological and global techniques such as transcriptomics and proteomics. The system is based on a solid phase formed by glass beads corresponding to particles in soil, clay, or sand natural habitats of streptomycetes. The beads are immersed in a liquid medium that allows easy modification or replacement of nutrients and growth factors as well as radioactive labeling of proteins. Scanning electron microscopy was used to analyze morphological differentiation of streptomycetes on glass beads and two-dimensional protein electrophoresis to demonstrate the potential of the system for analyses of protein synthesis profiles during the developmental program. This system facilitates studies of differentiation including expression and posttranslation modifications of streptomycetes proteins, secondary metabolite biosynthesis, and morphological development.

scholarly journals Axial dispersion of the liquid phase on a three-phase Karr reciprocating plate column

2004 ◽  
Vol 69 (7) ◽  
pp. 581-599 ◽  
Author(s):  
Ljubisa Nikolic ◽  
Vesna Nikolic ◽  
Vlada Veljkovic ◽  
Miodrag Lazic ◽  
Dejan Skala
Keyword(s):  
Liquid Phase ◽  
Gas Flow ◽  
Dispersion Coefficient ◽  
Solid Phase ◽  
Axial Dispersion ◽  
Two Phase ◽  
Three Phase ◽  
Phase Liquid ◽  
Similar Equation ◽  
Plate Column

The influence of the gas flow rate and vibration intensity in the presence of the solid phase (polypropylene spheres) on axial mixing of the liquid phase in a three phase (gas-liquid-solid) Karr reciprocating plate column (RPC) was investigated. Assuming that the dispersionmodel of liquid flow could be used for the real situation inside the column, the dispersion coefficient of the liquid phase was determined as a function of different operating parameters. For a two-phase liquid-solid RPC the following correlation was derived: DL = 1.26(Af)1.42 UL 0.51 ?S 0.23 and a similar equation could be applied with ? 30 % confidence for the calculation of axial dispersion in the case of a three-phase RPC: DL = 1.39(Af)0.47 UL0.42UG0.03 ?S -0.26.

scholarly journals Crystal Growth in Gels from the Mechanisms of Crystal Growth to Control of Polymorphism: New Trends on Theoretical and Experimental Aspects

Crystals ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 443 ◽  
Author(s):  
Omar Velásquez-González ◽  
Camila Campos-Escamilla ◽  
Andrea Flores-Ibarra ◽  
Nuria Esturau-Escofet ◽  
Roberto Arreguin-Espinosa ◽  
...  
Keyword(s):  
Crystal Growth ◽  
Solid Phase ◽  
Theory And Practice ◽  
Protein Crystal ◽  
Gel Growth ◽  
Two Phase ◽  
X Ray Crystallography ◽  
Crystal Polymorphism ◽  
Phase Liquid ◽  
Solid System

A gel can be considered to be a two-phase (liquid and solid) system, which lacks flow once it reaches a stationary state. The solid phase is usually a tridimensional polymeric mesh, while the liquid phase is usually found in three forms: contained in great cavities, retained in the capillary pores between micelles, or adsorbed on the surface of a micelle. The influence of the use of gels in crystal growth is diverse and depends on the type of gel being used. A decrease in solubility of any solute in the liquid may occur if the solvent interacts extensively with the polymeric section, hence, the nucleation in gels in these cases apparently occurs at relatively low supersaturations. However, if the pore size is small enough, there is a possibility that a higher supersaturation is needed, due to the compartmentalization of solvents. Finally, this may also represent an effect in the diffusion of substances. This review is divided into three main parts; the first evaluates the theory and practice used for the obtainment of polymorphs. The second part describes the use of gels into crystallogenesis of different substances. The last part is related to the particularities of protein crystal polymorphism, as well as modern trends in gel growth for high-resolution X-ray crystallography.

scholarly journals Numerical Study of Two-Phase Granular Flow for Process Equipment

2000 ◽  
Vol 122 (4) ◽  
pp. 462-468 ◽  
Author(s):  
R. Djebbar ◽  
S. B. Beale ◽  
M. Sayed
Keyword(s):  
Granular Flow ◽  
Solid Phase ◽  
Numerical Study ◽  
Numerical Procedure ◽  
Process Equipment ◽  
Two Phase ◽  
Angle Of Internal Friction ◽  
Phase Liquid ◽  
Multi Phase ◽  
Realistic Geometries

This paper reports on a research program of modeling multi-phase granular flow. Both single-phase granular flow and two-phase liquid/granular flow in a pressure vessel were considered. For the latter case, detailed results based on a viscous/Mohr-Coulomb closure were compared to existing formulations. Idealized test cases indicated that the numerical procedure is sound. Subsequent simulations of two-phase flow using realistic geometries and boundary conditions showed that the pressure distribution in the solid phase is fundamentally different for the Mohr-Coulomb system than for the conventional system. The effect of the angle of internal friction, geometry, and other parameters is discussed. [S0094-9930(00)01204-X]

The effect of compatibility of suspension particles with the oil medium on electrorheological efficiency

2011 ◽  
Vol 23 (9) ◽  
pp. 1055-1059 ◽  
Author(s):  
Martin Stenicka ◽  
Vladimir Pavlinek ◽  
Petr Saha ◽  
Natalia V Blinova ◽  
Jaroslav Stejskal ◽  
...  
Keyword(s):  
Electric Field ◽  
Liquid Medium ◽  
Silicone Oil ◽  
Solid Phase ◽  
Suitable Model ◽  
Phase Liquid ◽  
Er Fluids ◽  
Sulphamic Acid

The compatibility of solid phase–liquid medium appears to be an important factor for controlling the electrorheological (ER) efficiency of ER fluids. Controlled protonation of polyaniline particles with perfluorooctanesulfonic, tartaric, or sulphamic acid provides particles in a broad range of hydrophobicity as a suitable model to study this phenomenon. The relation between organization of such particles in silicone oil suspensions in on/off electric field at rest and during flow at various volume concentrations was demonstrated.

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