Electrostatic and Excluded Volume Effects on the Transport of Electrolytes in Poly(ethylene glycol)−Water “Mixed Solvents”

2003 ◽  
Vol 107 (44) ◽  
pp. 12363-12369 ◽  
Author(s):  
Fabio Capuano ◽  
Alessandro Vergara ◽  
Luigi Paduano ◽  
Onofrio Annunziata ◽  
Roberto Sartorio
Keyword(s):  
Ethylene Glycol ◽  
Mixed Solvents ◽  
Excluded Volume ◽  
Poly Ethylene Glycol ◽  
Excluded Volume Effects ◽  
Poly Ethylene ◽  
Volume Effects

Factors influencing aggregation behavior of poly(γ-benzyl l-glutamate)-graft-poly(ethylene glycol) copolymer in mixed solvents

2010 ◽  
Vol 64 (5) ◽  
Author(s):  
Guo-Quan Zhu ◽  
Fa-Gang Wang ◽  
Yu-Ying Liu ◽  
Qiao-Chun Gao
Keyword(s):  
Ethylene Glycol ◽  
Polymeric Micelles ◽  
Mixed Solvents ◽  
Particle Diameter ◽  
Solution Concentration ◽  
Aggregation Behavior ◽  
Average Particle ◽  
Poly Ethylene Glycol ◽  
Preparation Conditions ◽  
Poly Ethylene

AbstractPoly(γ-benzyl l-glutamate)-graft-poly(ethylene glycol) (PBLG-graft-PEG) copolymer was synthesized by the ester exchange reaction of PBLG homopolymer with mPEG. Aggregation behavior of the PBLG-graft-PEG copolymer in mixtures of ethanol and chloroform was investigated by transmission electron microscopy (TEM), dynamic light scattering (DLS), and viscometry. Effects of the polymer solution concentration, grafting degree, test temperature, and chloroform content on the morphology, average particle diameter, and critical micelle concentration (CMC) of the micelles formed by the PBLG-graft-PEG copolymer in the mixed solvents were mainly studied. It was revealed that the PBLG-graft-PEG copolymer can self-assemble into polymeric micelles with a core-shell structure in various shapes depending on the preparation conditions.

scholarly journals The influence of poly(ethylene glycol) 6000 on the properties of skeletal-muscle actin

1983 ◽  
Vol 213 (3) ◽  
pp. 651-659 ◽  
Author(s):  
R L Tellam ◽  
M J Sculley ◽  
L W Nichol ◽  
P R Wills
Keyword(s):  
Skeletal Muscle ◽  
Ethylene Glycol ◽  
Actin Polymerization ◽  
Excluded Volume ◽  
Muscle Actin ◽  
Actin Monomer ◽  
Poly Ethylene Glycol ◽  
Fluorescence Measurements ◽  
Volume Increment ◽  
Poly Ethylene

Poly(ethylene glycol) 6000 affected many of the properties of skeletal-muscle actin. It accelerated the rate and increased the extent of actin polymerization as measured by light-scattering and sedimentation studies respectively. Moreover, intrinsic-fluorescence measurements showed that addition of poly(ethylene glycol) 6000 decreased the rate of EDTA-induced denaturation of actin monomer and increased the temperature at which irreversible conformational changes occur in actin monomer. These effects occurred without any apparent direct binding interaction and are postulated to be a consequence of the effect of excluded volume on the thermodynamic activity of actin. A relationship based on spherical geometry was formulated which described the co-volume increment that occurs upon addition of a monomer to a long linear polymer in the presence of a space-filling macromolecule. The application of this relationship to the poly(ethylene glycol) 6000-actin system was not without assumption, but it permitted quantitative estimation of the co-volume increment which proved to be of the sign and magnitude required to explain the increased extent of actin polymerization found experimentally in the presence of various concentrations of poly(ethylene glycol) 6000. It is suggested that, in vivo, excluded volume may play a role in actin-filament formation and in the maintenance of the native G-actin structure.

Sodium Chloride Molar Conductance in Different Poly(ethylene glycol)–Water Mixed Solvents

2007 ◽  
Vol 36 (5) ◽  
pp. 617-629 ◽  
Author(s):  
Fabio Capuano ◽  
Gaetano Mangiapia ◽  
Ornella Ortona ◽  
Gerardino d’Errico ◽  
Roberto Sartorio
Keyword(s):  
Sodium Chloride ◽  
Ethylene Glycol ◽  
Mixed Solvents ◽  
Molar Conductance ◽  
Poly Ethylene Glycol ◽  
Poly Ethylene

PIEZOELECTRIC PROPERTIES OF POLY(3-HYDROXYBUTYRATE-CO-3-HEDROXYBUTYRATE)-CO-POLY(ETHYLENE GLYCOL) PRODUCED BY CONTROLLED MICROBIOLOGICAL BIOSYNTHESIS

2019 ◽  
Vol 10 (10) ◽  
Author(s):  
Anton Bonartsev ◽  
Vera Voinova ◽  
Elizaveta Akoulina ◽  
Andrey Dudun ◽  
Irina Zharkova ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Piezoelectric Properties ◽  
Poly Ethylene Glycol ◽  
Poly Ethylene
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