4results about How to "Increase particle concentration" patented technology

The invention belongs to the technical field of flue gas purification, and particularly relates to an eddy current polar plate electric precipitator equipped with a pre-charging device and a working method thereof.The electric precipitator comprises an air inlet pipe, a shell and an air outlet pipe and further comprises the pre-charging device, an eddy current type dust collection polar plate and an ultrasonic coagulation layer, and the eddy current type dust collection polar plate is arranged in a dust collection chamber of the shell. The pre-charging device is close to the air inlet pipe, a first flow equalizing plate layer is arranged at the front end of the pre-charging device, a second flow equalizing plate layer is arranged at the rear end of the pre-charging device, and the pre-charging device comprises a plurality of sets of hanging mechanisms, cathode wires, vibrators and a pre-charging support. The plurality of vortex type dust collection polar plates are arranged in a staggered manner in the airflow direction, the discharge electrodes are arranged in front of and on the side surfaces of the vortex type dust collection polar plates, and a detachable filter screen is arranged between the ultrasonic coagulation layer and the air outlet pipe. Pre-charged dust enters the vortex polar plate dust collection area through the flow equalizing plate and is subjected to ultrasonic coagulation, the dust collection efficiency is greatly improved, and ultra-clean emission can be achieved.

The invention relates to a device (10) for cleaning a transport container (30) of a can-type hollow body (12), in particular a semiconductor wafer or a lithographic mask, the hollow body (12) comprising a bottom wall (32) forming an inner surface (33) of the hollow body and one or more side walls (34), and an opening (36) arranged opposite the bottom wall (32) and surrounded by an edge surface (38) of the side walls (34). The device (10) comprises a support wall (20) on which an edge surface (38) of the hollow body (12) can be placed, a cleaning device (40) through which a first cleaning fluid for cleaning the inner surface (33) of the hollow body can be dispensed when the hollow body (12) is connected to the support wall (20), and a supply device (37) which is arranged in the support wall (20) or fixed to the support wall (20) and through which a second cleaning fluid can be dispensed for cleaning the inner surface (33) of the hollow body (12) can be dispensed when the hollow body (12) is connected to the support wall (20). A flushing fluid can be conducted to the edge surface (38) by means of a supply device (37), the supply device (37) comprising a movable element (39) which can be moved towards the edge surface (38) by means of the flushing fluid.

The invention provides a particle sorting micro-fluidic chip based on viscoelastic iron fluid and a preparation method of the particle sorting micro-fluidic chip. The particle sorting micro-fluidic chip comprises a first inlet, a branch channel, a magnet, a first sorting module and a second sorting module, the first inlet is connected with one end of the branch channel, and the first sorting module and the second sorting module are connected with the other end of the branch channel; the magnet is positioned between the first sorting module and the second sorting module; a mixed solution of viscoelastic iron fluid and two kinds of particles is injected from the first inlet and equivalently flows into the first sorting module and the second sorting module through the branch channel. The method can realize continuous and sheath-free separation of particles with different sizes, and has the advantages of high flux, small structure size, no need of magnetic bead modification, simple operation and the like.

The present application relates to a preparation method of exosomes, comprising the following steps: 1) concentrating cell supernatant to obtain a concentrated solution by using a tangential flow filtration method; 2) removing nucleic acids from the concentrated solution by using a universal nuclease and resuspending to obtain a crude extract; 3) performing density gradient centrifugation on the crude extract, and collecting the exosome layer; 4) performing low-speed centrifugation on the exosome layer under a centrifugal force less than or equal to 50000g, and removing the precipitate to obtain a preliminary purified solution; and 5) performing ultracentrifugation on the preliminary purified solution under a centrifugal force greater than or equal to 100000g, and the obtained precipitate is the exosomes. The exosomes obtained by the method have a complete and un-deformed membrane structure, higher purity and particle concentration, and better quality compared with exosomes prepared by existing methods. Meanwhile, the method has high yield and low cost, and helps to realize the industrialized preparation of exosomes, and provides strong support for targeted drug delivery research using exosomes as carriers.