Acoustic spectroscopy was used to monitor the droplet size distribution in a classic three component system of heptane, water, and aerosol-OT (AOT). The size of the reverse microemulsion drops was varied by changing the molar ratio of water to AOT surfactant. The acoustic results for this transparent microemulsion were found to be in close agreement with literature results obtained with small a...

We predict, qualitatively, the structural transitions in microemulsion systems induced by nonionic polymers, by virtue of their ability to associate with the surfactant assemblies. The predictions are made possible by linking (a) theoretical calculations of the domains of existence of oil-in-water (O/W) and water-in-oil (W/O) droplet microemulsions with (b) the experimental observation that on ...

in this work needle like hydroxy apatite were synthesized in a reverse microemulsion droplets of water in cyclohexane, separated by a cationic surfactant and co-surfactant, in the presence of na-polyacrylate (paa) as an anionic polyelectrolyte. characterization of the as formed hap nanoparticles at the room temperature were carried out by x-ray diffraction (xrd) and fourier transform infrared s...

The droplet phase of a reverse microemulsion formed by the surfactant cetyltrimethylammonium ferrocyanide was used as a matrix to synthesize nanoparticles of nickel hexacyanoferrate by adding just a solution of NiCl2 to the microemulsion media. Dynamic light scattering and small-angle neutron scattering measurements show that the reverse microemulsion droplets employed have a globular structure...

der process and is strongly influenced by bile secretion, pancreatic exocrine secretion, food intake and gastrointestinal motility4. For this reason, many formulations have been proposed to improve the gastrointestinal absorption of cyclosporine A. In 1996, a cyclosporine A formulation in a microemulsion concentrate, containing a surfactant, lipophilic and hydrophilic solvents and an organic so...

The aim of the present study was to prepare, characterize and in-vitro evaluation of a Winsor-IV type microemulsion based drug delivery system incorporating celecoxib as BCS class–II model drug. Attempts were made to prepare cost effective O/W microemulsion using Tween 80, Glycerol, sunflower oil and water. The existence of microemulsion zone was investigated using phase diagrams. The systems w...

magnetite (fe 3 o 4  and nio) nanoparticles with a size range of 40–60 nm were prepared by sol-gel technique in nano and micro reverse micelles (water- in-oil). the surface properties, size, morphology and crystallographic structure of fe 3 o 4 and nio particles are characterized by means of x-ray diffraction, transmission electron microscope and scanning electron microscope which will give muc...

objective(s):investigation of phase diagram of various drug formulations is effective to predict different phase region of drugs to detect final formula. the purpose of this research was to develop the ternary phase diagrams for a drug microemulsion system consisting of cucurbita pepo (pumpkin) oil, surfactant (tween 80) and deionized water. materials and methods:an electrical conductivity was ...

The purpose of this study was to develop a docetaxel microemulsion containing an anti-tumor synergistic ingredient (Brucea javanica oil) and to investigate the characteristics of the microemulsion. Brucea javanica oil contains oleic acid and linoleic acids that have been shown by animal and human studies to inhibit tumor formation. The microemulsion containing Brucea javanica oil, medium-chain ...

objective(s):the objective of this study was to find a stable microemulsion vehicle for transdermal delivery of ibuprofen to improve the skin permeability. materials and methods: microemulsion was prepared using different sorts of oils, surfactants and co-surfactants. pseudo-ternary phase diagrams were used to evaluate the microemulsion domain. the effects of oleic acid and surfactant mixture o...