摘要:
We describe a method of layer-by-layer deposition of a plurality of layers of material onto the wall or walls of a channel of a microfluidic device, the method comprising: loading a tube with a series of segments of solution, a said segment of solution bearing a material to be deposited; coupling said tube to said microfluidic device; and injecting said segments of solution into said microfluidic device such that said segments of solution pass, in turn, through said channel depositing successive layers of material to perform said layer-by-layer deposition onto said wall or walls of said channel. Embodiments of the methods are particularly useful for automated surface modification of plastic, for example PDMS (Poly(dimethylsiloxane)), microchannels. We also describe methods and apparatus for forming double-emulsions.
摘要:
Counter-flow heat exchanger is constructed with plenums at either end that separate the opposing fluids, the channels of which are arrayed in a checkerboard patterns, such that any given channel is surrounded by channels of opposing streams on four sides—laterally on both sides and vertically above and below.
摘要:
Counter-flow heat exchanger is constructed with plenums at either end that separate the opposing fluids, the channels of which are arrayed in a checkerboard patterns, such that any given channel is surrounded by channels of opposing streams on four sides—laterally on both sides and vertically above and below.
摘要:
A microfluidic radiopharmaceutical production system and process for synthesizing per run approximately one (1) to four (4) unit dose of a radiopharmaceutical biomarker for use in positron emission tomography (PET). The system includes a reaction vessel that receives a radioisotope from an accelerator or other radioisotope generator. Organic and aqueous reagents are introduced into the reaction vessel, and the mixture is heated to synthesize a solution of a pre-selected radiopharmaceutical. The radiopharmaceutical solution is passed through a solid phase extraction column and a filter for purification. The synthesis process reduces waste and allows for the production of radiopharmaceutical on an as-needed basis. The synthesis process allows for production on-site and close to the location where the unit dose will be administered to the patient, which reduces time between synthesis and administration, thereby minimizing the loss of active isotopes through decay and allowing the production of lesser amounts of radioisotopes overall.
摘要:
The invention relates to a catalyst-coated support containing a planar support, a primer layer composed of nanoparticles made of material containing silicon oxide, which primer layer is applied to the planar support, and at least one catalyst layer applied to the primer layer. The applied layers are characterized by an exceptionally good tensile adhesive strength and can be used exceptionally well in heterogeneously catalyzed gas-phase reactions, in particular in microreactors.
摘要:
The present invention provides: a method for synthesizing a halogen-substituted saccharide from a leaving group-substituted saccharide in a short-time and continuously; a reaction composition; and a device for synthesis of same, i.e., the method being for synthesizing a halogen-substituted saccharide from a leaving group-substituted saccharide by a halogen-substituted saccharide synthesis reaction using a subcritical fluid or a supercritical fluid as the reaction solvent; the reaction composition of the same being an aqueous solution of halogen-substituted saccharide; and the device for synthesis being a device for producing the same, the method being for producing a halogen-substituted saccharide with a subcritical fluid or a supercritical fluid at a temperature of 100 to 400°C and a pressure of 0.1 to 40 MPa or a mixed solvent of aprotic organic solvent or inorganic solvent mixed therein as the reaction solvent, under a catalyst-free condition, by introducing the leaving group-substituted saccharide and the reaction solvent into a circulating-type high-temperature and high-pressure device to produce selectively a halogen-substituted saccharide at high yield, high selectivity, high speed and continuously, while reducing the amount of energy consumption and the amount of waste.
摘要:
A flow-type laboratory scale ozonolysis apparatus (100) according to the invention comprises a reservoir (104), a feed pump (102), a mixing element (120) with two inlets and an outlet, a reactor unit (110) and a pressure-adjusting means (160), all connected into a flow path. The ozonolysis apparatus (100) further comprises an ozone source (110), as well as a dispensing valve (112) transmitting a gas stream only in a single direction and installed between the ozone source (110) and one of the inlets of the mixing element (120). The feed pump (102) of the ozonolysis apparatus (100) according to the invention is a liquid pump generating a constant volume rate, the reservoir (104) contains at least the substance, as a solute, to be subjected to the ozonolysis reaction and the reactor unit consists of first and second reactor zones differing in function from one another. In the flow path, the outlet of the first reactor zone is connected to the inlet of the second reactor zone. Furthermore, an inlet for feeding in substances is inserted into the flow path between the reactor zones, and the pressure-adjusting means (160) is installed into the flow path after the reactor unit and is provided with an electrically governed control.