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92results about How to "Equipment is cheap" patented technology

Continuous process for making polymers in carbon dioxide

A method for carrying out the continuous polymerization of a monomer in a carbon dioxide reaction medium comprises the steps of: (a) providing an apparatus including a continuous reaction vessel and a separator; (b) carrying out a polymerization reaction in the reaction vessel by combining a monomer and a carbon dioxide reaction medium therein (and preferably by also combining an initiator therein), wherein the reaction medium is a liquid or supercritical fluid, and wherein the reaction produces a solid polymer product in the reaction vessel; then (c) withdrawing a continuous effluent stream from the reaction vessel during the polymerization reaction, wherein the effluent stream is maintained as a liquid or supercritical fluid; then (d) passing the continuous effluent stream through the separator and separating the solid polymer therefrom while maintaining at least a portion of the effluent stream as a liquid or supercritical fluid; and then (e) returning at least a portion of the continuous effluent stream to the reaction vessel while maintaining the effluent stream as a liquid or supercritical fluid. The need for significant recompression of the continuous effluent stream prior to return to the reaction vessel is thereby minimized. Apparatus for carrying out such methods is also disclosed.
Owner:THE UNIV OF NORTH CAROLINA AT CHAPEL HILL +1

Bipolar electrode electrogenerated chemiluminescence paper based micro-fluidic chip and imaging sensing application thereof

The invention discloses a bipolar electrode electrogenerated chemiluminescence paper based micro-fluidic chip and the application thereof to imaging sensing. The preparation method of the chip comprises the following steps: designing patterns of a micro-fluidic channel and an electrode through software and then manufacturing screens, clinging the electrode screen onto filter paper, printing the shape and the size of the electrode on the filter paper by brushing conductive carbon paste on the electrode screen, taking the filter paper on which the electrode is printed, clinging the channel screen onto filter paper, performing grinding and brushing on the channel screen through a wax pencil, then performing heating, so as to ensure that wax penetrates through the filter paper to form the micro-fluidic channel and a solution storage tank, and obtaining the bipolar electrode electrogenerated chemiluminescence paper based micro-fluidic chip. The chip takes the carbon paste as bipolar electrode material on paper for the first time, an electrogenerated chemiluminescence chip manufactured by taking the chip as a basis performs imaging sensing detection on tripropylamine, and the chip has the advantages of bipolar electrode electrochemistry and paper based microfluidics.
Owner:SOUTH CHINA NORMAL UNIVERSITY

Two-dimensional bar code duplex communication method

The invention discloses a two-dimensional bar code duplex communication method and aims at providing the duplex communication method based on two-dimensional bar codes. According to the duplex communication method, the communication security is high and the data transmission efficiency and reliability are high in a scene with a relatively high confidentiality demand. The method is realized throughutilization of the following technical scheme that a sending end codes to-be-transmitted data into a two-dimensional bar code image sequence and displays the two-dimensional bar code image sequence in sequence through utilization of a miniature liquid crystal display; a receiving end collects the two-dimensional bar code image sequence through utilization of a vision camera or a two-dimensional bar code scanner, carries out repeated frame elimination, image graying, median filtering and binarization preprocessing on collection results and decodes the collection results according to a two-dimensional bar code coding format, thereby acquiring decoding results; the receiving end integrates the decoding results according to frame serial numbers and the frame number, thereby acquiring a sending end source transmission file; and the receiving end carries out real-time feedback or delayed feedback on a receiving result according to system transmission configuration. According to the method,the defect of a data transmission security hinge is solved.
Owner:10TH RES INST OF CETC
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