A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
Caselli, M.
- Use of Minetic Membrane Systems in Photosynthesis Studies: Different Aggregation and Hydration forms Of Chl-a in Reverse Micelles
Authors
1 Dipartimento di Chimica, Universita di Bari Via Amendola 173, 70126 Bari, IT
Source
Journal of Surface Science and Technology, Vol 5, No 4 (1989), Pagination: 309-319Abstract
Different hydration and aggregation forms of Chl-a were introduced in reverse micelles simply by injecting a solution of Chl-a in a polar solvent in AOT-isooctane.When the injected Chl-a was dissolved in 50:50 (V:V) water/acetone mixtures, the spectra maintained the same characteristics of that in the original solvents only if AOT was present at a concentration higher than 0.05 M.
A coefficient for the Chl-a partition between the dispersed microemulsions and the continuous solvent was determined.
Keywords
Reverse Micelle, Injection, Chlorophyll-a Aggregation, Binary Solvent.- Potential and Ions Distribution inside Reversed Micelles in Equilibrium with an Electrolyte Solution
Authors
1 Dipartimento di Chimica dell Universita di Bari IV Trav. 200, Re David 70126 Bari, IT
Source
Journal of Surface Science and Technology, Vol 5, No 3 (1989), Pagination: 241-254Abstract
The Poisson-Boltzmann equation for the charges hosted in the water dispersed into a reversed micelle in equilibrium with an uni-univalent electrolyte aqueous solution is considered. The solution is looked for in a form of a series as reported in literature for similar problems.
Thermodynamic equilibrium allows to calculate the concentration in the micellar centre and the mean concentration of the counterions and of the co ions inside the reverse micelle. The calculated concentrations are compared with the experimental values measured by AAS for sodium AOT micelles.
The agreement is rather satisfying for micelles in equilibrium with NaCl and LiCl aqueous solutions while some discrepancy is present for the Na+ concentration in the dispersed water of the reversed micelles in equilibrium with KCl solutions.
The validity of an approximation used in a model previously described to rationalize the results of experiments of protein uptaking is discussed.