scholarly journals New structural approach to rationalize the foam film stability of oppositely charged polyelectrolyte/surfactant mixtures

2020 ◽  
Vol 56 (6) ◽  
pp. 952-955 ◽  
Author(s):  
Martin Uhlig ◽  
Oliver Löhmann ◽  
Salomé Vargas Ruiz ◽  
Imre Varga ◽  
Regine von Klitzing ◽  
...  
Keyword(s):  
Structural Data ◽  
Structural Approach ◽  
Neutron Reflectometry ◽  
Surfactant Mixtures ◽  
Film Stability ◽  
Foam Film ◽  
First Time ◽  
Oppositely Charged

The foam film stability of polyelectrolyte/surfactant mixtures is rationalized using structural data from neutron reflectometry for the first time.

Foam Films from Oppositely Charged Polyelectolyte/Surfactant Mixtures: Effect of Polyelectrolyte and Surfactant Hydrophobicity on Film Stability

Langmuir ◽  
2010 ◽  
Vol 26 (12) ◽  
pp. 9321-9327 ◽  
Author(s):  
Nora Kristen ◽  
Andrea Vüllings ◽  
André Laschewsky ◽  
Reinhard Miller ◽  
Regine von Klitzing
Keyword(s):  
Surfactant Mixtures ◽  
Film Stability ◽  
Foam Films ◽  
Oppositely Charged

scholarly journals Surface adsorption of sulfonated poly(phenylene sulfone)/C14TAB mixtures and its correlation with foam film stability

2016 ◽  
Vol 18 (27) ◽  
pp. 18414-18423 ◽  
Author(s):  
Martin Uhlig ◽  
Reinhard Miller ◽  
Regine von Klitzing
Keyword(s):  
Surface Tension ◽  
Surface Elasticity ◽  
Surface Adsorption ◽  
Surfactant Mixtures ◽  
Film Stability ◽  
Foam Film ◽  
Stability Measurements ◽  
Sulfonated Poly

Polyelectrolyte/surfactant mixtures of rigid monosulfonated poly(phenylene sulfone) (sPSO2-220) and tetradecyl trimethylammonium bromide (C14TAB) were investigated by surface tension, surface elasticity and foam film stability measurements.

Mesoscopic characterization of the optical property of antiphase boundaries in CuPt-ordered GaInP2

1999 ◽  
Vol 588 ◽  
Author(s):  
Y. Ohno ◽  
S. Takeda
Keyword(s):  
Optical Property ◽  
Light Emission ◽  
Polarized Light ◽  
Structural Data ◽  
Luminescence Spectra ◽  
Antiphase Boundaries ◽  
Transmission Electron ◽  
Tem Method ◽  
Low Dimensional ◽  
First Time

AbstractWe have developed an apparatus for polarized cathodoluminescence (CL) spectroscopy combined with transmission electron microscopy (TEM), that enables us to obtain simultaneously structural data in higher spatial resolution by TEM and polarized luminescence spectra by CL of the same microscopic area. The polarized-CL/TEM method is very useful to study the optical properties of low-dimensional microstructures in semiconducting materials. We have applied the method to examine the optical property of antiphase boundaries in CuPt-ordered GaInP2 and found, for the first time, the polarized light emission from the APBs whose habit planes are parallel to the (T11) and (1T0) atomic planes.

scholarly journals Trehalulose Synthase Native and Carbohydrate Complexed Structures Provide Insights into Sucrose Isomerization

2007 ◽  
Vol 282 (38) ◽  
pp. 28126-28136 ◽  
Author(s):  
Stéphanie Ravaud ◽  
Xavier Robert ◽  
Hildegard Watzlawick ◽  
Richard Haser ◽  
Ralf Mattes ◽  
...  
Keyword(s):  
Substrate Recognition ◽  
Three Dimensional ◽  
Enzyme Reaction ◽  
Structural Data ◽  
Side Reactions ◽  
Binding Modes ◽  
Product Specificity ◽  
Reaction Specificity ◽  
First Time ◽  
Enzyme Targeting

Various diseases related to the overconsumption of sugar make a growing need for sugar substitutes. Because sucrose is an inexpensive and readily available d-glucose donor, the industrial potential for enzymatic synthesis of the sucrose isomers trehalulose and/or isomaltulose from sucrose is large. The product specificity of sucrose isomerases that catalyze this reaction depends essentially on the possibility for tautomerization of sucrose, which is required for trehalulose formation. For optimal use of the enzyme, targeting controlled synthesis of these functional isomers, it is necessary to minimize the side reactions. This requires an extensive analysis of substrate binding modes and of the specificity-determining sites in the structure. The 1.6-2.2-Å resolution three-dimensional structures of native and mutant complexes of a trehalulose synthase from Pseudomonas mesoacidophila MX-45 mimic successive states of the enzyme reaction. Combined with mutagenesis studies they give for the first time thorough insights into substrate recognition and processing and reaction specificities of these enzymes. Among the important outcomes of this study is the revelation of an aromatic clamp defined by Phe256 and Phe280 playing an essential role in substrate recognition and in controlling the reaction specificity, which is further supported by mutagenesis studies. Furthermore, this study highlights essential residues for binding the glucosyl and fructosyl moieties. The introduction of subtle changes informed by comparative three-dimensional structural data observed within our study can lead to fundamental modifications in the mode of action of sucrose isomerases and hence provide a template for industrial catalysts.

Equilibrium and kinetically trapped aggregates in polyelectrolyte–oppositely charged surfactant mixtures

2020 ◽  
Vol 48 ◽  
pp. 91-108 ◽  
Author(s):  
Eduardo Guzmán ◽  
Laura Fernández-Peña ◽  
Francisco Ortega ◽  
Ramón G. Rubio
Keyword(s):  
Surfactant Mixtures ◽  
Oppositely Charged
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