Lowering of the miscibility gap in the dioctanoylphosphatidylcholine-water system by addition of urea

1989 ◽  
Vol 93 (10) ◽  
pp. 4282-4286 ◽  
Author(s):  
Bruce L. Carvalho ◽  
Giuseppe Briganti ◽  
Sow Hsin Chen
Keyword(s):  
Water System ◽  
Miscibility Gap

Impact of sodium chloride on the expansion of a liquid-liquid miscibility gap in an API/water system. Case study of Brivaracetam

2016 ◽  
Vol 515 (1-2) ◽  
pp. 702-707
Author(s):  
Nicolas Couvrat ◽  
Julien Mahieux ◽  
Baptiste Fours ◽  
Yohann Cartigny ◽  
Eric Schenkel ◽  
...  
Keyword(s):  
Sodium Chloride ◽  
Water System ◽  
Miscibility Gap ◽  
Liquid Miscibility Gap

Properties of organic-water mixtures. IV. The effect of various salts on the miscibility gap of the glycerol triacetate-water system

1965 ◽  
Vol 20 (9) ◽  
pp. 1000-1013 ◽  
Author(s):  
Richard J Raridon ◽  
Kurt A Kraus
Keyword(s):  
Water System ◽  
Miscibility Gap ◽  
Glycerol Triacetate

scholarly journals Behavior of light elements in iron-silicate-water-sulfur system during early Earth’s evolution

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Riko Iizuka-Oku ◽  
Hirotada Gotou ◽  
Chikara Shito ◽  
Ko Fukuyama ◽  
Yuichiro Mori ◽  
...  
Keyword(s):  
Iron Sulfide ◽  
Water System ◽  
Iron Silicate ◽  
Miscibility Gap ◽  
Light Elements ◽  
Primitive Earth ◽  
Iron Hydride ◽  
Ideal Composition ◽  
Increasing Temperature ◽  
In Situ Neutron Diffraction

AbstractHydrogen (H) is considered to be one of the candidates for light elements in the Earth’s core, but the amount and timing of delivery have been unknown. We investigated the effects of sulfur (S), another candidate element in the core, on deuteration of iron (Fe) in iron–silicate–water system up to 6–12 GPa, ~ 1200 K using in situ neutron diffraction measurements. The sample initially contained saturated water (D2O) as Mg(OD)2 in the ideal composition (Fe–MgSiO3–D2O) of the primitive Earth. In the existence of water and sulfur, phase transitions of Fe, dehydration of Mg(OD)2, and formation of iron sulfide (FeS) and silicates occurred with increasing temperature. The deuterium (D) solubility (x) in iron deuterides (FeDx) increased with temperature and pressure, resulting in a maximum of x = 0.33(4) for the hydrous sample without S at 11.2 GPa and 1067 K. FeS was hardly deuterated until Fe deuteration had completed. The lower D concentrations in the S-containing system do not exceed the miscibility gap (x <  ~ 0.4). Both H and S can be incorporated into solid Fe and other light elements could have dissolved into molten iron hydride and/or FeS during the later process of Earth’s evolution.

Lamellar Miscibility Gap in a Binary Catanionic Surfactant−Water System

2007 ◽  
Vol 111 (48) ◽  
pp. 13520-13526 ◽  
Author(s):  
Bruno F. B. Silva ◽  
Eduardo F. Marques ◽  
Ulf Olsson
Keyword(s):  
Water System ◽  
Miscibility Gap ◽  
Catanionic Surfactant

scholarly journals Phase Separation Kinetics in Immiscible Liquids

1986 ◽  
Vol 87 ◽  
Author(s):  
Lee H. Ng ◽  
Donald R. Sadoway
Keyword(s):  
Refractive Index ◽  
Phase Separation ◽  
Water System ◽  
Miscibility Gap ◽  
Immiscible Liquids ◽  
Optical Techniques ◽  
Phase Separation Kinetics ◽  
Physical Mixing ◽  
Kinetics Of ◽  
Separation Kinetics

AbstractThe kinetics of phase separation in the succinonitrile-water system are being investigated. Experiments involve initial physical mixing of the two immiscible liquids at a temperature above the consolute, decreasing the temperature into the miscibility gap, followed by imaging of the resultant microstructure as it evolves with time. Refractive index differences allow documentation of the changing microstructures by noninvasive optical techniques without the need to quench the liquid structures for analysis.

A Comparison of Tem and Apfim to the Interpretation of Modulated Microstructures

1985 ◽  
Vol 43 ◽  
pp. 70-71
Author(s):  
M.G. Burke ◽  
M.K. Miller
Keyword(s):  
Low Temperature ◽  
Microstructural Characterization ◽  
Superlattice Reflection ◽  
High Volume ◽  
Atom Probe ◽  
Dark Field ◽  
Miscibility Gap ◽  
Second Phase ◽  
Two Phase ◽  
Probe Field

Interpretation of fine-scale microstructures containing high volume fractions of second phase is complex. In particular, microstructures developed through decomposition within low temperature miscibility gaps may be extremely fine. This paper compares the morphological interpretations of such complex microstructures by the high-resolution techniques of TEM and atom probe field-ion microscopy (APFIM).The Fe-25 at% Be alloy selected for this study was aged within the low temperature miscibility gap to form a <100> aligned two-phase microstructure. This triaxially modulated microstructure is composed of an Fe-rich ferrite phase and a B2-ordered Be-enriched phase. The microstructural characterization through conventional bright-field TEM is inadequate because of the many contributions to image contrast. The ordering reaction which accompanies spinodal decomposition in this alloy permits simplification of the image by the use of the centered dark field technique to image just one phase. A CDF image formed with a B2 superlattice reflection is shown in fig. 1. In this CDF micrograph, the the B2-ordered Be-enriched phase appears as bright regions in the darkly-imaging ferrite. By examining the specimen in a [001] orientation, the <100> nature of the modulations is evident.

Transition alpha structure in beta-isomorphous Nb-Hf alloys

1987 ◽  
Vol 45 ◽  
pp. 232-233
Author(s):  
R.W. Carpenter ◽  
Changhai Li ◽  
David J. Smith
Keyword(s):  
Solid Solution ◽  
Solution Phase ◽  
Miscibility Gap ◽  
Large Strains ◽  
Solid Solution Phase ◽  
Two Phase ◽  
Diffuse Intensity ◽  
Metastable Form ◽  
The Matrix ◽  
Equilibrium Morphology

Binary Nb-Hf alloys exhibit a wide bcc solid solution phase field at temperatures above the Hfα→ß transition (2023K) and a two phase bcc+hcp field at lower temperatures. The β solvus exhibits a small slope above about 1500K, suggesting the possible existence of a miscibility gap. An earlier investigation showed that two morphological forms of precipitate occur during the bcc→hcp transformation. The equilibrium morphology is rod-type with axes along <113> bcc. The crystallographic habit of the rod precipitate follows the Burgers relations: {110}||{0001}, <112> || <1010>. The earlier metastable form, transition α, occurs as thin discs with {100} habit. The {100} discs induce large strains in the matrix. Selected area diffraction examination of regions ∼2 microns in diameter containing many disc precipitates showed that, a diffuse intensity distribution whose symmetry resembled the distribution of equilibrium α Bragg spots was associated with the disc precipitate.

Vesicles as an equilibrium structure of a simple surfactant-water system

1994 ◽  
Vol 4 (9) ◽  
pp. 1585-1604 ◽  
Author(s):  
L. Cantù ◽  
M. Corti ◽  
E. Del Favero ◽  
A. Raudino
Keyword(s):  
Water System ◽  
Equilibrium Structure
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