Crude topiramate was prepared from the reaction between diacetonefructopyranose, sulfuric diamide, and 2-picoline. During a controlled processing the presence of Triton-X-100, crude topiramate in a methanol-water solvent, was converted to pure micron size topiramate particles. The factors affecting the purification and micronization of topiramate, such as solvent and anti-solvent type and conce...

The proposed linear electron-positron collider TESLA is based on 1.3 GHz superconducting niobium cavities for particle acceleration. For a center-of-mass energy of 500 GeV an accelerating field of 23.4 MV/m is required which is reliably achieved with a niobium surface preparation by chemical etching. An upgrade of the collider to 800 GeV requires an improved cavity preparation technique. In thi...

In the favourable current context for the development of biological treatment of Residual Municipal Solid Wastes (RMSW), the Rotary Drum Reactor (RDR) is a pre-treatment tool increasingly used in construction or rehabilitation facilities. RDR allows a better preparation of waste before mechanical sorting and biological treatment. This preparation process, recognized by profession’s actors, is h...

objective(s): response surface methodology (rsm) by central composite design (ccd) was applied to statistically optimize the preparation of rutin-quercetin (ru-qr) dual drug loaded human hair keratin nanoparticles as well as evaluate the characteristics. materials and methods: the effects of three independent parameters, namely, temperature (x1:10-40 c), surfactant (x2: sds (1), sls (2), tween-...

leptospirosis is one of the most prevalent zoonotic diseases worldwide. currently, multivalent whole-cell leptospiral vaccines can induce protection against leptospirosis. therefore, preparation and formulation of new generations of vaccines that can stimulate long-term immunity for leptospirosis control are essential. the aim of this study was to prepare and characterize alginate microspheres ...

Light-scattering measurements were made on a preparation of polyglucose isolated from HeLa cells. The molecular weight was determined, from a Zimm plot of the data, to be 4.6" lO 6 . The character of the angular dependence of the particlescattering factor suggests the shape of the particle in solution with 779 3~ gyration radius approximates that of a rigid rod, 27oo A in length with a thicknes...

When placing an indirect restoration such as a porcelain veneer, inlay, or onlay, the intaglio surface is typically treated in some fashion to ensure optimal bonding to the resin-based adhesives and luting cements required to affix it to the tooth tissues. A variety of surface preparation techniques have been advocated, including the use of acids, particle abrasion, various adhesives, and chemi...

Title of Document: CO-SOLVENT ASSISTED SPRAY PYROLYSIS FOR THE PREPARATION OF METAL MICROPARTILCE. Kai Zhong, Doctor of Philosophy, 2012 Directed By: Professor Sheryl H. Ehrman, Department of Chemical and Biomolecular Engineering Metal and bimetallic particles play an important role in catalytic, medical and electronic applications. Various techniques have been developed for the preparation of ...

Determination of nano particle size is substantial since the nano particle size exerts a significant effect on various properties of nano materials. Accordingly, proposing non-destructive, accurate and rapid techniques for this aim is of high interest. There are some conventional techniques to investigate the morphology and grain size of nano particles such as scanning electron microscopy (SEM)...

In the past decade a large amount of analysis techniques have been scaled down to the microfluidic level. However, in many cases the necessary sample preparation, such as separation, mixing and concentration, remains to be performed off-chip. This represents a major hurdle for the introduction of miniaturized sample-in/answer-out systems, preventing the exploitation of microfluidic’s potential ...