Capillary microfluidic devices are used to prepare monodisperse polymersomes consisting of a hydrogel core and a bilayer membrane of amphiphilic diblock-copolymers. To make polymersomes, water-in-oil-in-water double-emulsion drops are prepared as templates through single-step emulsification in a capillary microfluidic device. The amphiphile-laden middle oil phase of the double-emulsion drop dew...

We introduce an emulsification technique that creates monodisperse double-emulsion drops with a core–shell geometry having an ultra-thin wall as a middle layer. We create a biphasic flow in a microfluidic capillary device by forming a sheath flow consisting of a thin layer of a fluid with high affinity to the capillary wall flowing along the inner wall of the capillary, surrounding the innermos...

Natural plant extracts have been shown as effective and attractive dental biomaterials with promising properties for restorative/reparative procedures. These bioactive extracts, however, may lose their stability when exposed to air, moisture, or light, if not well-protected. Here, we present a novel technique for sequestering bioactive extracts within polymer microcapsules for long-term stabili...

In this work, microfluidic technology is used to rapidly create hundreds of thousands of monodisperse double and triple emulsion drops that serve as 3D microenvironments for the containment and growth of bacterial biofilms. The size of these drops, with diameters from tens to hundreds of micrometers, makes them amenable to rapid manipulation and analysis. This is demonstrated by using microscop...

in present paper, dynamic behavior and control of a fluidized bed reactor for polyethylene production has been considered. a double active sites model for ziegler-natta catalysts is used for simulation of polymerization reaction. hydrodynamic behavior of the bed is modeled using a two phase model including bubble and emulsion phases in which bubble phase has plug flow pattern with differentiall...

Emulsions have long been utilized to make materials for foods, drugs, cosmetics, and displays because of their efficient encapsulation properties. While they are most commonly made in bulk, recent advances in microfluidics have enabled the design and manipulation of emulsion drops with unprecedented control and flexibility, albeit only on a drop-bydrop basis. Multiple-phase emulsions of very hi...

We sought to determine if the solvent in the formulation of etomidate is responsible for haemolysis in patients. In a randomized, prospective, double-blind study of 49 patients undergoing otolaryngological surgery, patients received etomidate dissolved in propylene glycol or in lipid emulsion. Concentrations of free haemoglobin and haptoglobin were measured before and for up to 360 min after in...

Das/Cheng/Pai/AAPM//2002 Historical Perspective 1826 Joseph Niepce First Photograph 1836 J. M. Daguerre Concept of developer 1889 Eastman Kodak Cellulose nitrate base for emulsion 1890 Hurter &Driffield Defined the term optical density 1895 Roentgen First Radiograph 1896 Carl Schlussner First glass plate for radiography 1913 Kodak Film on Cellulose nitrate base 1918 Kodak Double emulsion film 1...

Reassociating double-stranded DNA from single-stranded components is necessary for many molecular genetics experiments. The choice of a DNA reassociation method is dictated by the complexity of the starting material. Reassociation of simple oligomers needs only slow cooling in an aqueous environment, whereas reannealing the many single-stranded DNAs of complex genomic mixtures requires both a p...

A microfluidic approach is reported for the high-throughput, continuous production of giant unilamellar vesicles (GUVs) using water-in-oil-in-water double emulsion drops as templates. Importantly, these emulsion drops have ultrathin shells; this minimizes the amount of residual solvent that remains trapped within the GUV membrane, overcoming a major limitation of typical microfluidic approaches...