Coexistence curve of polystyrene in methylcyclohexane. X. Two-phase coexistence curves for ternary solutions near the tricritical compositions

1999 ◽  
Vol 111 (14) ◽  
pp. 6617-6624 ◽  
Author(s):  
Mitsuo Nakata ◽  
Toshiaki Dobashi ◽  
Yu-ichi Inakuma ◽  
Kiyotaka Yamamura
Keyword(s):  
Coexistence Curve ◽  
Phase Coexistence ◽  
Two Phase ◽  
Ternary Solutions

Observation of Stripe Superstructure in the β-Two-Phase Coexistence Region of Cholesterol–Phospholipid Mixtures in Supported Membranes

2014 ◽  
Vol 136 (49) ◽  
pp. 16962-16965 ◽  
Author(s):  
Seyed R. Tabaei ◽  
Joshua A. Jackman ◽  
Bo Liedberg ◽  
Atul N. Parikh ◽  
Nam-Joon Cho
Keyword(s):  
Phase Coexistence ◽  
Supported Membranes ◽  
Coexistence Region ◽  
Two Phase

Two-Phase Coexistence in Single-Grain BaTiO3-(Mn0.5Zn0.5)Fe2O4Composites, Via Solid-State Reaction

2009 ◽  
Vol 92 (7) ◽  
pp. 1552-1555 ◽  
Author(s):  
Yaodong Yang ◽  
Shashank Priya ◽  
Jie-Fang Li ◽  
Dwight Viehland
Keyword(s):  
Solid State ◽  
Solid State Reaction ◽  
Phase Coexistence ◽  
Two Phase ◽  
Single Grain

Critical lines and phase equilibria in binary van der Waals mixtures

1980 ◽  
Vol 298 (1442) ◽  
pp. 495-540 ◽  
Keyword(s):  
Phase Equilibria ◽  
Binary Mixtures ◽  
Critical Points ◽  
Van Der Waals ◽  
Coexistence Curve ◽  
Phase Behaviour ◽  
Maximum Temperature ◽  
Phase System ◽  
Two Phase ◽  
Critical Solution Temperatures

The study of phase equilibria is historically one of the most important sources of information about the nature of intermolecular forces in non-electrolyte liquids and their mixtures. Many of the main features of vapour-liquid and liquid-liquid phase behaviour were already well characterized experimentally during the early part of this century, but the theoretical explanation of phase equilibria for a wide variety of substances and over a large range of pressures and temperatures has lagged far behind. This paper presents theoretical studies of phase equilibria in binary mixtures obeying the van der Waals equation, especially liquid-liquid equilibria that can occur at high pressures. The variety of fluid phase behaviour that occurs in binary mixtures can be qualitatively discussed in terms of the changes in thermodynamic properties near critical points. Upper critical solution temperatures (UCSTs) occur when a heterogeneous (two-phase) system becomes a homogeneous (one-phase) system when the temperature is raised. The maximum temperature along the temperature-mole fraction ( T, x ) coexistence curve for constant pressure is the UCST at this pressure. Lower critical solution temperatures (LCSTs) occur when a homogeneous system becomes a two-phase system when the temperature is increased. The LCST is at the minimum of the T, x coexistence curve. Thermodynamic considerations of critical points yield requirements for the curvature of the mixing functions plotted against x .

Raman Spectroscopic Study of Phase Coexistence in Binary Phospholipid Bilayers

2020 ◽  
Vol 75 (1) ◽  
pp. 87-93 ◽  
Author(s):  
Sergey V. Adichtchev ◽  
Konstantin A. Okotrub ◽  
Alexey M. Pugachev ◽  
Irina V. Zaytseva ◽  
Nikolay V. Surovtsev
Keyword(s):  
Raman Line ◽  
Low Frequency ◽  
Phospholipid Bilayers ◽  
Phase Coexistence ◽  
Lipid Phase ◽  
Label Free ◽  
Scanning Calorimetry ◽  
Two Phase ◽  
Raman Spectroscopic ◽  
Raman Scattering Spectra

Binary phospholipid bilayers composed of 1,2-dioleoyl-sn-glycero-3-phosphocholine and 1,2-palmitoyl-sn-glycero-3-phosphocholine (DPPC) were studied by Raman spectroscopy and differential scanning calorimetry (DSC). We examined features in Raman scattering spectra that are sensitive to the lipid phase and, therefore, could indicate the phase coexistence. It was found that the low-frequency half-width of half-maximum (LHWHM) of the 2850 cm−1 Raman line, corresponding to the symmetric CH2 stretching vibrations, unequivocally reveals the coexisting phospholipids in ordered and disordered conformational states, which correspond to ordered and disordered phases coexistence, in the DPPC mole concentration range from 0.4 to 0.9. The phase coexistence in this concentration range was supported by the particular concentration behavior of the ratio between the intensities of the 2880 cm−1 antisymmetric CH2 vibration line and the 2850 cm−1 symmetric one. It was also shown that the spectral shape of the 1300 cm−1 Raman line, corresponding to the CH2 twisting vibrations, is a good indicator for the phase state and phase coexistence in the phospholipid bilayers. Comparison with the DSC curves confirmed that in the DPPC mole concentration range from 0.4 to 0.9, the two phase transition peaks are observed in DSC curve, those positions are independent of the DPPC concentration. The outcome of the study is the robust label-free contactless approach for the detection of the lipid phase separation, which can be realized with the micrometer resolution.

scholarly journals Influence of salts on the coexistence curve and protein partitioning in nonionic aqueous two-phase micellar systems

2014 ◽  
Vol 31 (4) ◽  
pp. 1057-1064 ◽  
Author(s):  
A. M. Lopes ◽  
V. C. Santos-Ebinuma ◽  
A. Pessoa Júnior ◽  
C. O. Rangel-Yagui
Keyword(s):  
Coexistence Curve ◽  
Two Phase ◽  
Micellar Systems ◽  
Protein Partitioning
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