Polyelectrolyte Complex
Mostrando 13-16 de 16 artigos, teses e dissertações.
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13. Layer-by-layer deposition of oppositely charged polyelectrolytes on the surface of condensed DNA particles.
DNA can be condensed with an excess of poly-cations in aqueous solutions forming stable particles of submicron size with positive surface charge. This charge surplus can be used to deposit alternating layers of polyanions and polycations on the surface surrounding the core of condensed DNA. Using poly-L-lysine (PLL) and succinylated PLL (SPLL) as polycation
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14. Ionic regulation in genetic translation systems.
The polyelectrolyte theory can provide an interpretation of the interdependence of pH, ionic strength, and polyamines one observes in the activity of ribonuclease acting on RNA. According to this theory: (i) A nucleic acid-enzyme complex and the suspending medium may be considered as two phases in equilibrium, even though within limits, the complex is solubl
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15. Preparation and evaluation of chitosan/carrageenan beads for controlled release of sodium diclofenac
The polyelectrolyte complex (PEC) hydrogel beads based on chitosan (CS) and carrageenan (CR) have been studied as a controlled release device to deliver sodium diclofenac (DFNa) in the simulated gastrointestinal condition. Various factors potentially influencing the drug release (ie, CS/CR proportion, DFNa content, types and amount of cross-linking agents) w
Springer-Verlag.
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16. Thermodynamic extent of counterion release upon binding oligolysines to single-stranded nucleic acids.
A major contribution to the binding free energy associated with most protein-nucleic acid complexes is the increase in entropy due to counterion release from the nucleic acid that results from electrostatic interactions. To examine this quantitatively, we have measured the thermodynamic extent of counterion release that results from the interaction between s