Relaxation spectra and dipolar correlations for flexible polymers with bulky side groups

1992 ◽  
Vol 96 (16) ◽  
pp. 6843-6848 ◽  
Author(s):  
Ricardo Diaz-Calleja ◽  
Evaristo Riande ◽  
Julio San Roman
Keyword(s):  
Flexible Polymers ◽  
Relaxation Spectra

Relaxation spectra and viscoelastic properties of the binary linear flexible polymers

1988 ◽  
Vol 5 (2) ◽  
pp. 101-108
Author(s):  
Seok-Jeong Yoon ◽  
Kwang-Man Kim ◽  
Seong-Ihl Woo ◽  
In-Jae Chung
Keyword(s):  
Viscoelastic Properties ◽  
Flexible Polymers ◽  
Relaxation Spectra

Flexible polymers in a nematic medium: a Monte Carlo simulation

1993 ◽  
Vol 3 (5) ◽  
pp. 603-609 ◽  
Author(s):  
J. H. van Vliet ◽  
M. C. Luyten ◽  
G. ten Brinke
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Flexible Polymers

Interference effects in Mössbauer relaxation spectra

1977 ◽  
Vol 38 (6) ◽  
pp. 691-696 ◽  
Author(s):  
F. Hartmann-Boutron ◽  
D. Spanjaard
Keyword(s):  
Interference Effects ◽  
Relaxation Spectra

SPIN RELAXATION SPECTRA OF Γ8 QUARTET

1976 ◽  
Vol 37 (C6) ◽  
pp. C6-85-C6-88
Author(s):  
G. K. SHENOY ◽  
B. D. DUNLAP ◽  
S. DATTAGUPTA ◽  
L. ASCH
Keyword(s):  
Spin Relaxation ◽  
Relaxation Spectra

scholarly journals Polyelectrolyte Gels Formed by Filamentous Biopolymers: Dependence of Crosslinking Efficiency on the Chemical Softness of Divalent Cations

Gels ◽  
2021 ◽  
Vol 7 (2) ◽  
pp. 41
Author(s):  
Katrina Cruz ◽  
Yu-Hsiu Wang ◽  
Shaina A. Oake ◽  
Paul A. Janmey
Keyword(s):  
Alkaline Earth ◽  
Divalent Cations ◽  
Transition Metal Ions ◽  
Atomic Weight ◽  
Mechanical Resistance ◽  
Flexible Polymers ◽  
Interpenetrating Networks ◽  
Charge Densities ◽  
Polyelectrolyte Gels ◽  
Different Types

Filamentous anionic polyelectrolytes are common in biological materials. Some examples are the cytoskeletal filaments that assemble into networks and bundled structures to give the cell mechanical resistance and that act as surfaces on which enzymes and other molecules can dock. Some viruses, especially bacteriophages are also long thin polyelectrolytes, and their bending stiffness is similar to those of the intermediate filament class of cytoskeletal polymers. These relatively stiff, thin, and long polyelectrolytes have charge densities similar to those of more flexible polyelectrolytes such as DNA, hyaluronic acid, and polyacrylates, and they can form interpenetrating networks and viscoelastic gels at volume fractions far below those at which more flexible polymers form hydrogels. In this report, we examine how different types of divalent and multivalent counterions interact with two biochemically different but physically similar filamentous polyelectrolytes: Pf1 virus and vimentin intermediate filaments (VIF). Different divalent cations aggregate both polyelectrolytes similarly, but transition metal ions are more efficient than alkaline earth ions and their efficiency increases with increasing atomic weight. Comparison of these two different types of polyelectrolyte filaments enables identification of general effects of counterions with polyelectrolytes and can identify cases where the interaction of the counterions and the filaments exhibits stronger and more specific interactions than those of counterion condensation.

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