Block Copolymer Micelles as Matrixes for Incorporating Diselenide Compounds:  A Model System for a Water-Soluble Glutathione Peroxidase Mimic Fine-Tuned by Ionic Strength

Langmuir ◽  
2006 ◽  
Vol 22 (13) ◽  
pp. 5552-5555 ◽  
Author(s):  
Yapei Wang ◽  
Huaping Xu ◽  
Ning Ma ◽  
Zhiqiang Wang ◽  
Xi Zhang ◽  
...  
Keyword(s):  
Ionic Strength ◽  
Block Copolymer ◽  
Glutathione Peroxidase ◽  
Model System ◽  
Water Soluble ◽  
Peroxidase Mimic ◽  
Block Copolymer Micelles ◽  
Copolymer Micelles

Donnan Equilibria in Polymeric Micellar Systems with Weak Polyelectrolyte Shells: The Lowering of the pH Value

1997 ◽  
Vol 62 (11) ◽  
pp. 1730-1736 ◽  
Author(s):  
Petr Munk ◽  
Zdeněk Tuzar ◽  
Karel Procházka
Keyword(s):  
Ionic Strength ◽  
Block Copolymer ◽  
Ph Value ◽  
Electrolyte Solutions ◽  
Hydrogen Ions ◽  
Micellar Systems ◽  
Weak Electrolytes ◽  
Block Copolymer Micelles ◽  
Copolymer Micelles ◽  
Polyelectrolyte Solutions

When two electrolyte solutions are separated and only some of the ions can cross the boundary, the concentrations of these ions are different on both sides of the boundary. This is the well-known Donnan effect. When weak electrolytes are involved, the imbalance includes also hydrogen ions: there is a difference of pH across the boundary and the dissociation of nondiffusible weak electrolytes is suppressed. The effect is very pronounced when the concentration of the weak electrolyte is high and ionic strength is low. The significance of this phenomenon is discussed for polyelectrolyte solutions, and particularly for block copolymer micelles with weak polyelectrolyte shells. The effect is quite dramatic in the latter case.

Structure of pH-Dependent Block Copolymer Micelles:  Charge and Ionic Strength Dependence

2002 ◽  
Vol 35 (22) ◽  
pp. 8540-8551 ◽  
Author(s):  
Albert S. Lee ◽  
Vural Bütün ◽  
M. Vamvakaki ◽  
Steven P. Armes ◽  
John A. Pople ◽  
...  
Keyword(s):  
Ionic Strength ◽  
Block Copolymer ◽  
Ionic Strength Dependence ◽  
Strength Dependence ◽  
Block Copolymer Micelles ◽  
Ph Dependent ◽  
Copolymer Micelles

Hydrophobic domain structure of water-soluble block copolymer. 2. Transition phenomena of block copolymer micelles

1982 ◽  
Vol 15 (2) ◽  
pp. 281-286 ◽  
Author(s):  
Masahisa Ikemi ◽  
Nobuyuki Odagiri ◽  
Shinobu Tanaka ◽  
Isao Shinohara ◽  
Akio Chiba
Keyword(s):  
Block Copolymer ◽  
Domain Structure ◽  
Water Soluble ◽  
Hydrophobic Domain ◽  
Structure Of Water ◽  
Block Copolymer Micelles ◽  
Copolymer Micelles

β-lactam Functionalized Poly(isoprene-b-ethylene oxide) Amphiphilic Block Copolymer Micelles as a New Nanocarrier System for Curcumin

2010 ◽  
Vol 6 (3) ◽  
pp. 277-284 ◽  
Author(s):  
Konstantinos Gardikis ◽  
Konstantinos Dimas ◽  
Aristidis Georgopoulos ◽  
Eleni Kaditi ◽  
Stergios Pispas ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Ethylene Oxide ◽  
Amphiphilic Block Copolymer ◽  
Block Copolymer Micelles ◽  
Copolymer Micelles

A Monte Carlo Study of Flexible Polymer Chain Conformations in Restricted Volumes. I. A Model for Insoluble Blocks Conformations in Swollen Cores of Multimolecular Spherical Block Copolymer Micelles

1993 ◽  
Vol 58 (10) ◽  
pp. 2290-2304 ◽  
Author(s):  
Zuzana Limpouchová ◽  
Karel Procházka
Keyword(s):  
Monte Carlo ◽  
Block Copolymer ◽  
Monte Carlo Study ◽  
Volume Effect ◽  
Micellar Systems ◽  
Flexible Polymer ◽  
Block Copolymer Micelles ◽  
Copolymer Micelles ◽  
Chain Conformations ◽  
Chain Lengths

Monte Carlo simulations of chain conformations in a restricted spherical volume at relatively high densities of segments were performed for various numbers of chains, N, and chain lengths (number of segments), L, on a tetrahedral lattice. All chains are randomly end-tethered to the surface of the sphere. A relatively uniform surface density of the tethered ends is guaranteed in our simulations. A simultaneous self-avoiding walk of all chains creates starting conformations for a subsequent equilibration. A modified algorithm similar to that of Siepmann and Frenkel is used for the equilibration of the chain conformations. In this paper, only a geometrical excluded volume effect of segments is considered. Various structural and conformational characteristics, e.g. segment densities gS(r), free end densities gF(r) as functions of the position in the sphere (a distance from the center), distributions of the tethered-to-free end distances, ρTF(rTF), etc. are calculated and their physical meaning is discussed. The model is suitable for studies of chain conformations is swollen cores of multimolecular block copolymer micelles and for interpretation of non-radiative excitation energy migration in polymeric micellar systems.

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