Ion permeation across model lipid membranes: A kinetic approach

Article Abstract:

Ion transport in dimyristoylphosphatidylethanolamine bilayers was investigated using current-voltage characteristic measurements.

Ions, Lipid membranes

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Properties of mixed DOTAP-DPPC bilayer membranes as reported by differential scanning calorimetry and dynamic light scattering measurements

Article Abstract:

The effect of a cationic lipid [DOTAP] on both the thermotropic phase behavior and the structural organization of aqueous dispersions of dipalmitoyl-phosphatidylcholine [DPPC] is examined by using high-sensitivity differential scanning calorimetry and dynamic light scattering measurements. The self-assembling restructuring from an aqueous multilamellar structure toward a liposomal phase can be obtained by decreasing the phospholipid phase transition temperature and by increasing the temperature of the system.

Pharmaceutical Preparation Manufacturing, Pharmaceutical preparations, Biological Product (except Diagnostic) Manufacturing, Biological products exc. diagnostic, Liposomes, Liposome Drug Delivery Systems, Analysis, Usage, Phospholipids, Light scattering, Structure

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Electrical conductivity of dilute and semidilute aqueous polyelectrolyte solutions. A scaling theory approach

Article Abstract:

The large counterion atmosphere surrounding the polyion cause the difference in the behavior of aqueous solutions within the charged polyion. These differences can influence a variety of transport and colligative properties. A description of the electrical conductivity of flexible polyelectrolytes in these aqueous solutions in the dilute and semidilute regimes is provided and discussed in detail in relation to a polymer chain. A model based on new data gathered from electrical conductivity tests of salt-free aqueous solutions of poly(L-lysine) is proposed.

Chemistry, Physical and theoretical, Physical chemistry, Electrolyte solutions, Electrical conductivity, Polyelectrolytes

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