Small-angle neutron scattering of mixed ionic perfluoropolyether micellar solutions

Article Abstract:

The small-angle neutron scattering method is used to investigate the aqueous mixed micellar solutions of perflouropolyether carboxylic salts with ammonium counterions, as their shapes and dimensions are highly affected by the presence of the n3 surfactant. The analysis reveals that a close packing of the tails leads to a decrease in the micellar curvature and repulsions between the polar heads, which ultimately leads to a micellar growth in the ellipsoids with greater axial ratios.

Neutrons, Neutron scattering

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Picosecond optical thermometry of protein in [H.sub.2]O

Article Abstract:

The study makes use of the transient infrared (IR) absorption measurements to analyze the picosecond thermometry of the protein molecules, when placed in an aqueous environment. The small temperature changes, as well as the various measured transient absorption changes are found to be highly in accordance with the static temperature dependence of protein, as the thermally induced changes in the IR absorption reach the equilibrium within a few picoseconds.

Protein research, Chemical thermodynamics

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Specific anion binding to sulfobetaine micelles and kinetics of nucleophilic reactions

Article Abstract:

The transfer of [Br.sup.-] between water and sulfobetaine micelles are examined quantitatively by ion-selective electrodes (ISEs) and capillary electrophoresis. The studies have shown that the reaction of O[H.sup.-] with [Bz.sub.2]O, in solutions of sulfobetaine micelles, is inhibited by Cl[O.sub.4].sup.-].

Nucleophiles, Blood protein electrophoresis, Protein electrophoresis

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