(super 2)H NMR evidence for the formation of random mesh phases in nonionic surfactant-water systems

Article Abstract:

A study was conducted to show that simple (super 2)H nuclear magnetic resonance (NMR) experiments provide strong indication for the formation of the random mesh phase and the NMR data correlate well with results from small-angle X-ray scattering. The formation of the random mesh phase is quantified in terms of an effective order parameter that is unity in the classical lamellar phase and takes values of less than one in the random mesh phase, reaching 0.6 at lower temperatures.

Nuclear magnetic resonance

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Thermal diffusion behavior of nonionic surfactants in water

Article Abstract:

The thermal diffusion behavior of hexaethylene glycol monododecyl ether [[C.sub.12][E.sub.6]] in water is studied by using thermal diffusion forced Rayleigh scattering (TDFRS) and Soret coefficients, thermal diffusion coefficients and diffusion constants are determined at different temperatures and concentrations. The origin of the slow mode of the TDFRS signal is interpreted in terms of a ternary mixture of neutral micelles, dye-charged micelles and water.

Thermal properties, Thermal diffusivity, Rayleigh scattering

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Morphological transitions in model membrane systems by the addition of anesthetics

Article Abstract:

Two nonionic surfactant systems are used as model membranes to examine the mechanism of several morphological transitions that take place in the membranes after addition of anesthetics, leading to a better pore formation and switching transmembrane channels across the membranes. The analysis reveals that some of the anesthetics lead to a decrease in the membrane's interfacial curvature, whereas the other group tends to increase it largely.

Pharmaceutical Preparation Manufacturing, Pharmaceutical preparations, Anesthetic Preparations, Composition, Properties, Membrane potentials, Membrane potential, Anesthetics, Morphological variation

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