Phase and self-assembly transition induced by glycerol–borax interaction in an aqueous surfactant two-phase system

Soft Matter ◽  
2009 ◽  
Vol 5 (21) ◽  
pp. 4250 ◽  
Author(s):  
Ying Zhao ◽  
Yun Yan ◽  
Lingxiang Jiang ◽  
Jianbin Huang ◽  
Heinz Hoffmann
Keyword(s):  
Self Assembly ◽  
Phase System ◽  
Two Phase

Effect of Surfactants on the Self-Assembly of a Model Elastin-like Block Corecombinamer: From Micelles to an Aqueous Two-Phase System

Langmuir ◽  
2014 ◽  
Vol 30 (12) ◽  
pp. 3432-3440 ◽  
Author(s):  
Guillermo Pinedo-Martín ◽  
Emilio Castro ◽  
Laura Martín ◽  
Matilde Alonso ◽  
J. Carlos Rodríguez-Cabello
Keyword(s):  
Self Assembly ◽  
The Self ◽  
Phase System ◽  
Two Phase ◽  
Aqueous Two Phase System

SAXS of self-assembled oriented lamellar nanocomposite films: an advanced method of evaluation

2004 ◽  
Vol 37 (4) ◽  
pp. 575-584 ◽  
Author(s):  
Wilhelm Ruland ◽  
Bernd Smarsly
Keyword(s):  
Lattice Model ◽  
Self Assembly ◽  
Domain Boundary ◽  
Nanocomposite Films ◽  
Phase System ◽  
Two Phase ◽  
Fitting Procedure ◽  
X Ray Scattering ◽  
Evaporation Induced Self Assembly ◽  
Method Of Evaluation

Oriented lamellar nanocomposites formed of alternating organic and inorganic layers were prepared by evaporation-induced self-assembly and studied by small-angle X-ray scattering in symmetrical and asymmetrical reflection. Analytical expressions were used for a quantitative fit of the experimental data. The fitting procedure leads to a comprehensive characterization of the lamellar two-phase system in terms of the average thicknesses of the lamellae, the average period and the corresponding variances, using both the stacking model and the lattice model. Furthermore, the width of the domain boundary and the preferred orientation were determined. No significant differences could be found between the parameters obtained for the two models, but the lattice model leads to a better curve fitting. The effects of finite stack height and of instrumental broadening were found to be indistinguishable.

scholarly journals Structure-Function Relationships in Hydrophobins: Probing the Role of Charged Side Chains

2013 ◽  
Vol 79 (18) ◽  
pp. 5533-5538 ◽  
Author(s):  
Michael Lienemann ◽  
Julie-Anne Gandier ◽  
Jussi J. Joensuu ◽  
Atsushi Iwanaga ◽  
Yoshiyuki Takatsuji ◽  
...  
Keyword(s):  
Amino Acids ◽  
Self Assembly ◽  
Fluorescent Protein ◽  
Site Directed Mutagenesis ◽  
Phase System ◽  
Surface Binding ◽  
Two Phase ◽  
Content Type ◽  
Charged Amino Acids

ABSTRACTHydrophobins are small fungal proteins that are amphiphilic and have a strong tendency to assemble at interfaces. By taking advantage of this property, hydrophobins have been used for a number of applications: as affinity tags in protein purification, for protein immobilization, such as in foam stabilizers, and as dispersion agents for insoluble drug molecules. Here, we used site-directed mutagenesis to gain an understanding of the molecular basis of their properties. We especially focused on the role of charged amino acids in the structure of hydrophobins. For this purpose, fusion proteins consisting ofTrichoderma reeseihydrophobin I (HFBI) and the green fluorescent protein (GFP) that contained various combinations of substitutions of charged amino acids (D30, K32, D40, D43, R45, K50) in the HFBI structure were produced. The effects of the introduced mutations on binding, oligomerization, and partitioning were characterized in an aqueous two-phase system. It was found that some substitutions caused better surface binding and reduced oligomerization, while some showed the opposite effects. However, all mutations decreased partitioning in surfactant systems, indicating that the different functions are not directly correlated and that partitioning is dependent on finely tuned properties of hydrophobins. This work shows that not all functions in self-assembly are connected in a predictable way and that a simple surfactant model for hydrophobin function is insufficient.

On the Problem of “Two-Phase” Activated Sludge

1991 ◽  
Vol 24 (7) ◽  
pp. 59-64 ◽  
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.

Interphase distribution of 2-furylethylenes

1985 ◽  
Vol 50 (8) ◽  
pp. 1642-1647 ◽  
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.

Enhancing the Sensitivity of DNA and Aptamer Probes in the Dextran/PEG Aqueous Two-Phase System

2021 ◽  
Author(s):  
Qiaoshu Chen ◽  
Yanwen Zhang ◽  
Hui Chen ◽  
Jianbo Liu ◽  
Juewen Liu
Keyword(s):  
Phase System ◽  
Two Phase ◽  
Aqueous Two Phase System
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