Silver powders were prepared by a chemical reduction method. Effects of different surfactants during this preparation process examined. Using these silver powders, pastes for low temperature co-fired ceramics (LTCC) applications. Another batch added into the paste and evaluated. Moreover, various organic thixotropic agents used to modify thixotropy behavior paste. It was found that PVP (Polyvin...

in this study, tretinoin microemulsion has been formulated based on phase diagram studies by changing the amounts and proportions of inactive ingredients, such as surfactants, co-surfactants and oils. the effects of these variables have been determined on microemulsion formation, particle size of the dispersed phase and release profile of tretinoin from microemulsion through dialysis membrane. ...

Thixotropic materials, which become less viscous under stress and return to their original state when stress is removed, have been used to deliver gel-cell constructs and therapeutic agents. Here we show that a polymer-silica nanocomposite thixotropic gel can be used as a three-dimensional cell culture material. The gel liquefies when vortexed--allowing cells and biological components to be add...

In developing of ointment for topical treatment of colds the structural and mechanical properties of the ointment bases contained isopropyl palmitate, beeswax and solid fat in different concentrations have been studied. Amount of isopropyl palmitate 60% remained constant and the ratio of solid fat and bee wax was varied. In order to study thixotropic properties the curve of kinetics deformation...

Functionalized biomass waste sources of cellulose have drawn attention due to their high availability and sustainability properties. In this work we characterize the structural flow properties high-pressure homogenized citrus fiber dispersions, employing SAXS, rheology rheo-MRI techniques. The treatment disrupts microfibrillar network within fibers, but leaves individual microfibrils intact. Un...