Search for dissertations about: "polymeric counterion"
Found 4 swedish dissertations containing the words polymeric counterion.
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1. Controlling Structure and Water Miscibility of Polyion - Surfactant Ion Complex Salts
Abstract : The interaction between poylions and oppositely charged surfactant ions has been investigated. This has been done by using the pure complex salt (polyion + surfactant ion) as a point of departure. Different parameters of the complex salt have been varied in a systematic way and the effect on structure and water miscibility has been investigated. READ MORE
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2. Phase Equilibria and Structures of Oppositely Charged Polymers and Surfactants in Water
Abstract : A new approach to the study of aqueous mixtures of oppositely charged polymers and surfactants has been introduced. Pure polyion-surfactant ion complex salts have been synthesized and used as the point of departure. The elimination of the simple ions reduces the number of components in the mixtures, thus greatly simplifying the system. READ MORE
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3. Phase Behavior and Solution Properties of Aqueous Polyion-Surfactant Ion Systems
Abstract : Polyelectrolytes and oppositely charged surfactants interact through attractive electrostatic forces, which in many cases lead to phase separation already at low total concentrations. During the past 10-15 years investigations of these systems have been simplified through the use of complex salts that consist of surfactants with polymeric counterions in a 1:1 charge stoichiometry (no excess simple counterions present). READ MORE
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4. NMR studies of DNA structure and counterion behaviour
Abstract : DNA is a polymer of nucleotides, each nucleotide consisting of a negatively charged phosphate group, a ribose sugar unit, and a purine or pyrimidine base. The secondary structure of DNA is commonly a double-helix with Watson-Crick paired bases. Several secondary structures, all with these features, are observed for DNA. READ MORE