The rate of release of iron to 1,10-phenanthroline from ferritin fractions of different iron contents has been studied. The experimental results could be interpreted by a simple hypothetical model of the shape of the hydrous ferric oxide micelle at different iron contents, and reasonable correlation obtained between the rate of release and the calculated micelle surface areas. Initial rates of ...

Two-dimensional Nuclear Overhauser Enhancement SpectroscopY NMR has been applied to study sodiumdodecylsulfate (SDS)/polyethyleneoxide (PEO)/D2O at 10, 20, 25, and 40 ◦C. The results indicate that PEO interacts preferentially with the surface of the micelle aggregates at 20 and 25 ◦C, displacing some water molecules from the hydration sphere. At 40 ◦C the polymer tends to penetrate the interior...

The kinetics of alpha-chymotrypsin (alpha-CT) catalyzed hydrolysis of 4-nitrophenyl acetate has been studied in aqueous solution of alkyldimethylethanolammonium bromide (cetyl, dodecyl, decyl) surfactants at concentrations below and above their critical micelle concentration. From Michaelis-Mcnten kinetics, the catalytic rate constant kcat and the Michaelis constant KM have been determined. The...