Correlation between the stability of concentrated emulsions and the interfacial free energy between the two phases

1990 ◽  
Vol 138 (2) ◽  
pp. 473-479 ◽  
Author(s):  
H.H Chen ◽  
E Ruckenstein
Keyword(s):  
Free Energy ◽  
Interfacial Free Energy ◽  
Two Phases ◽  
The Stability ◽  
Concentrated Emulsions

Quantitative Evaluation of the Interfacial Free Energies at A Solid-Liquid Lamellar Eutectic Interface

1981 ◽  
Vol 12 ◽  
Author(s):  
W. F. Kaukler ◽  
J. W. Rutter
Keyword(s):  
Free Energy ◽  
Solid Phase ◽  
Interfacial Free Energy ◽  
Eutectic System ◽  
Liquid Interfaces ◽  
Free Energies ◽  
Two Phases ◽  
Interfacial Free Energies ◽  
The Individual ◽  
Solid Liquid

The solid-liquid interfacial free energies of each of the individual phases comprising the eutectic system, Carbon Tetrabromide-Hexachloroethane, were measured as a function of composition using a “grain boundary groove” technique. Thermodynamic data were combined with groove shape measurements made from high resolution optical photomicrographs of the solid-liquid interfaces to give the interfacial free energy data. An interfacial free energy balance at the eutectic trijunction was performed to obtain all the forces acting on that point. The three interphase interfacial free energies at the eutectic trijunctions as well as a solid-solid phase boundary torque were evaluated.It was found that the solid-liquid interfacial free energies of the two phases of the eutectic could be evaluated from photomicrographs of growing or stationary eutectic interfaces. In addition, it was found that for a substantial range of freezing conditions the eutectic interface shape can be predicted from a knowledge of the interfacial free energies alone.

Examining sharp restart in a Monte Carlo method for the linearized Poisson–Boltzmann equation

2020 ◽  
Vol 26 (3) ◽  
pp. 223-244
Author(s):  
W. John Thrasher ◽  
Michael Mascagni
Keyword(s):  
Monte Carlo ◽  
Free Energy ◽  
Monte Carlo Algorithm ◽  
Significant Bias ◽  
Poisson Boltzmann ◽  
Electrostatic Free Energy ◽  
Poisson Boltzmann Equation ◽  
The Stability ◽  
Potential Methods ◽  
The Individual

AbstractIt has been shown that when using a Monte Carlo algorithm to estimate the electrostatic free energy of a biomolecule in a solution, individual random walks can become entrapped in the geometry. We examine a proposed solution, using a sharp restart during the Walk-on-Subdomains step, in more detail. We show that the point at which this solution introduces significant bias is related to properties intrinsic to the molecule being examined. We also examine two potential methods of generating a sharp restart point and show that they both cause no significant bias in the examined molecules and increase the stability of the run times of the individual walks.

scholarly journals Curcuminoid-Tailored Interfacial Free Energy of Hydrophobic Fibers for Enhanced Biological Properties

2021 ◽  
Author(s):  
Wevernilson F. de Deus ◽  
Bruna M. de França ◽  
Josué Sebastian B. Forero ◽  
Alessandro E. C. Granato ◽  
Henning Ulrich ◽  
...  
Keyword(s):  
Free Energy ◽  
Interfacial Free Energy ◽  
Biological Properties

scholarly journals High stability of trehalose/maltose binding protein fromThermococcus litoralismakes it a good candidate as a sensitive element in biosensor systems for sugar control

2010 ◽  
Vol 24 (3-4) ◽  
pp. 349-353 ◽  
Author(s):  
Olga I. Povarova ◽  
Olga V. Stepanenko ◽  
Anna I. Sulatskaya ◽  
Irina M. Kuznetsova ◽  
Konstantin K. Turoverov ◽  
...  
Keyword(s):  
Free Energy ◽  
Sensitive Element ◽  
High Stability ◽  
Binding Protein ◽  
Maltose Binding Protein ◽  
Thermococcus Litoralis ◽  
Thermophilic Archaeon ◽  
Unfolded State ◽  
The Stability ◽  
Innate Ability

Fluorescence and circular dichroism in far-UV region were used to study the stability of trehalose/maltose binding protein (TMBP) from hyper thermophilic archaeonThermococcus litoralisand its complex with glucose (TMBP/Glc). The evaluation of difference between free energy of native and unfolded state for TMBP and TMBP/Glc showed that both of them are several times higher than that of proteins from mesophilic organisms. Due to the high stability and innate ability to bind glucose this protein is a good candidate as a sensitive element in biosensor systems for sugar control.

Modeling the Diffusion-Controlled Growth of Needle and Plate-Shaped Precipitates

2002 ◽  
Vol 731 ◽  
Author(s):  
Z. Guo ◽  
W. Sha
Keyword(s):  
Free Energy ◽  
Transformation Strain ◽  
Interfacial Free Energy ◽  
Growth Theory ◽  
Controlled Growth ◽  
Precipitate Morphology ◽  
Interface Kinetics ◽  
Diffusion Controlled ◽  
Precipitate Growth ◽  
Strain Stress

AbstractVarious theories have been developed to describe the diffusion-controlled growth of precipitates with shapes approximating needles or plates. The most comprehensive one is due to Ivantsov, Horvay and Cahn, and Trivedi (HIT theory), where all the factors that may influence the precipitate growth, i.e. diffusion, interface kinetics and capillarity, are accounted for within one equation. However, HIT theory was developed based on assumptions that transformation strain/stress and interfacial free energy are isotropic, which are not true in most of the real systems. An improved growth theory of precipitates of needle and plate shapes was developed in the present study. A new concept, the compression ratio, was introduced to account for influences from the anisotropy of transformation strain/stress and interfacial free energy on the precipitate morphology. Experimental evidence supports such compression effect. Precipitate growth kinetics were quantified using this concept. The improved HIT theory (IHIT theory) was then applied to study the growth of Widmanstatten austenite in ferrite in Fe-C-Mn steels. The calculated results agree well with the experimental observations.

Breakthrough of Sublimation Drying by Liquid Phase Deposition

2021 ◽  
Vol 314 ◽  
pp. 172-177
Author(s):  
Yuta Sasaki ◽  
Yousuke Hanawa ◽  
Masayuki Otsuji ◽  
Naozumi Fujiwara ◽  
Masahiko Kato ◽  
...  
Keyword(s):  
Free Energy ◽  
Liquid Phase ◽  
Film Thickness ◽  
Process Parameters ◽  
Interfacial Free Energy ◽  
The Other ◽  
Liquid Phase Deposition ◽  
Drying Method ◽  
Substrate Side ◽  
Drying Technology

Damage-free drying becomes increasingly difficult with the scaling of semiconductor devices. In this work, we studied a new sublimation drying technology for 3nm node and beyond. In order to investigate the collapse factor by conventional sublimation drying, we observed the pattern with cryo-SEM and revealed that the collapse occurred when the liquid film on the substrate solidified. Based on this result, we considered that it was important to deposit a solidified film uniformly from the substrate side to suppress collapse. Two key process parameters were evaluated to achieve the uniform formation of the solidified film. One is interfacial free energy and the other is film thickness of solution just before solidification. By optimizing two key parameters, it was successfully demonstrated to suppress pattern collapse of challenging devices. In this paper, we report on a new drying method: sublimation drying by LPD (Liquid-phase deposition).

Thermodynamical study of (CaGa2S4)x(BaGa2S4)1−x solid solutions

2021 ◽  
pp. 2150469
Author(s):  
T. G. Naghiyev ◽  
R. M. Rzayev
Keyword(s):  
Free Energy ◽  
Solid Solutions ◽  
Calculation Method ◽  
Solid Phase ◽  
Ternary Compounds ◽  
Free Energy Of Formation ◽  
Concentration Dependences ◽  
Solid Phase Reactions ◽  
Two Phases ◽  
Energy Of Formation

The solid solutions of [Formula: see text] were synthesized by solid-phase reactions from powder components of CaS, BaS, and Ga2S3. The temperature-concentration dependences of the Gibbs free energy of formation of [Formula: see text] solid solutions from ternary compounds and phase diagrams of the CaGa2S4–BaGa2S4 were determined by a calculation method. It was revealed that continuous solid solutions are formed in these systems. The spinodal decomposition of [Formula: see text] solid solutions into two phases is predicted at ordinary temperatures.

ADSORPTION OF BENZENE AND ETHANOL UP TO HIGH RELATIVE PRESSURES ON FINELY DIVIDED SODIUM CHLORIDE: PART I. PARTICLE SIZE EFFECTS AND THE ADSORPTION OF BENZENE: PART II. THE LOWERING OF SURFACE FREE ENERGY BY ETHANOL

1961 ◽  
Vol 39 (6) ◽  
pp. 1360-1371 ◽  
Author(s):  
R. R. Weiler ◽  
J. Beeckmans ◽  
R. McIntosh
Keyword(s):  
Free Energy ◽  
Sodium Chloride ◽  
Surface Free Energy ◽  
Convex Surface ◽  
Plane Surface ◽  
Saturated Vapor ◽  
Thick Layer ◽  
Interfacial Free Energy ◽  
Relative Pressure ◽  
Adsorption Data

Adsorption of benzene has been studied using four samples of fine sodium chloride. The range of relative pressures employed extended to 0.99. The data were employed to show that a correction to the relative pressure should be applied because of the curvature of the surface. The correction was made in the form of a reduction of the apparent relative pressure by application of the Kelvin equation, since the relative pressure over a convex surface would be less than over a plane surface. The adsorption data at high relative pressures for several samples of salt could then be represented by a common curve. It was further concluded that the thick-layer theory of adsorption due to Frenkel, Halsey, and Hill was applicable to adsorption on salt. Adsorption data for ethanol were then obtained and the reduction of surface free energy of the salt by the saturated vapor was evaluated. This figure was then combined with van Zeggeren's and Benson's value of the solid–liquid interfacial free energy for salt and ethanol to provide a provisional value of the surface free energy of sodium chloride of 227 ergs cm−2.

scholarly journals Advanced Modelling of KF Implemented Flying Wing

2019 ◽  
Vol 11 (4) ◽  
Author(s):  
Widanalage Dakshina ◽  
Thiwanka Fernando
Keyword(s):  
Extreme Condition ◽  
Flow Conditions ◽  
Ongoing Research ◽  
Stability And Control ◽  
Advanced Phase ◽  
Landing Gears ◽  
Two Phases ◽  
The Stability ◽  
And Control ◽  
Base Design

This research carries out the advanced phase in correlation with the previous published design of KF Implemented Flying Wing. At the primary stage the basic design was considered under omission of non-static components and turbulent conditions. At this stage the simulations have taken a step ahead with improved flow conditions and advanced modeling of the design. As per the design aspects the engines, pylons, landing gears and shape improvements were done with solid modeling. Due to the computational limitations this was divided in to two phases as cruising conditions with non-static components and further studies to be carried out in Takeoff and Landing conditions with extended landing gears. Under the stability and control conditions a separate research is being carried out in achieving the optimum capability. Propfan engine selected for extreme condition evaluations. The implementations were made without disrupting the base design which was presented in phase one basic simulation carried out prior to this. The simulation results deemed to be promising for the first stage as well as the effect of new components. The secondary target areas are to be carried out in further ongoing research as well

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