نتایج جستجو برای: solvent evaporation
تعداد نتایج: 74329 فیلتر نتایج به سال:
Abstract Artefact-avoiding isolation of the volatiles from foods is a crucial step before analysis odour-active compounds by gas chromatography (GC). In past 20 years, solvent extraction followed solvent-assisted flavour evaporation (SAFE) has become standard approach, particularly prior to GC–olfactometry. The manual valve SAFE equipment, however, leads suboptimal yields and risk contamination...
Nanoparticles were obtained by nanoprecipitation and emulsion solvent evaporation (ESE) method. In the ESE method, size of particles depended on type concentration surfactant (in water phase) polymer organic phase). The best results with ionic surfactants, however, use such compounds may accelerate degradation process polymers. ratio (methylene chloride) to non-solvent (hexane) has a significan...
Aqueous dispersions of fullerene C60 were prepared from fulleride solutions in tetrahydrofuran, followed by air oxidation, transfer to water and solvent evaporation. Fulleride exposition produces charged THF that can be transferred produce aqueous dispersions, stable for months.
The use of spontaneous self-assembly as a lithographyand external-fields-free means to construct well-ordered, often intriguing structures, has received much attention owing to the ease of producing complex structures with small feature sizes. Drying mediated self-assembly of nonvolatile solutes (polymers, nanoparticles, and colloids) through irreversible solvent evaporation of a sessile drople...
Ionic polymer-metal composites (IPMCs) consist of a perfluorinated ionomer membrane (usually Nafion or Flemion) plated on both faces with a noble metal such as gold or platinum and neutralized with a certain amount of counterions that balance the electrical charge of anions covalently fixed to the membrane backbone. IPMCs are electroactive materials that can be used as actuators and sensors. Th...
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