36results about How to "Controllable number" patented technology

The invention relates to a polymer-base carbon nanotube dispersing auxiliary, a synthesis method and application thereof. The polymer-base carbon nanotube dispersing auxiliary is an amorphous polystyrene homopolymer with the function of pyrene, wherein the structural formula is a polymer that one end of the polystyrene main chain is sealed by 0.9-1.05 pyrene units, the number-average molar mass ranges from 5000 to 30000, and the molecular weight distribution index ranges from 1.10 to 1.21. The polymer-base carbon nanotube dispersing auxiliary is synthesized by an anion polymerization method, reactivity pyrene-containing compound is added in the later period of living polymerization of the styrene, and the reaction is terminated with methanol at the end of polymerization. The polymer-base carbon nanotube dispersing auxiliary can remarkably improve the dispersing ability in the normal organic solvent, and even carbon nanotube dispersing liquid with high concentration can be prepared. The dispersing liquid can be used for preparing styryl polymer (polystyrene or styryl copolymer)/carbon nanotube composite material of the carbon nanotube evenly dispersed in the matrix resin.

The invention belongs to the field of pharmaceutical preparations, and relates to preparation of a novel target nano carrier and application of the novel target nano carrier in a camptothecin drug targeting delivery system. The system can be represented as PAMAM-HA/drug, wherein PAMAM is polyamide amine-amine arboraceous macromolecules of different generations, HA is hyaluronic acid of different molecular weights, and the drug is one or more of camptothecin anticancer drugs such as camptothecin, 10- hydroxycamptothecine, topotecan and the like. The carrier is used for wrapping the camptothecin drugs, and has the actions of prolonging the drug blood circulation time, improving the drug bioavailability, reducing the non-tumor part concentration of the drug, reducing the drug cytotoxicity, and simultaneously protecting the lactonic rings of the camptothecin drugs from damage, thereby improving the tumor treatment efficiency from multiple aspects. The nano carrier provided by the invention has important significance in promoting the safe delivery of the camptothecin drugs and the effective treatment of tumor.

The invention discloses a device for efficiently preparing superfine spherical metal powder with a high melting point. The device comprises a shell, and a crucible and a powder collecting area which are arranged in a chamber of the shell, and is characterized in that a plurality of melting pools with the same volume are formed inside the crucible, and gaskets with small holes which are communicated with the chamber are fixed at the bottoms of the melting pools; a transmission rod comprises transmission support rods with the number the same as that of the melting pools, and the bottoms of the transmission support rods are aligned with circular holes in the gaskets with small holes; a thermocouple is arranged inside the crucible, and an induction heater is arranged outside the crucible; and the powder collecting area comprises a rotating disk which is used for atomizing metal droplets and is arranged at the bottom of the chamber and connected with a motor, and a collecting tank is also formed in the bottom of the chamber. The invention also discloses a method for efficiently preparing superfine spherical metal powder with the high melting point. By mainly combining a pulse micropore injection method with a centrifugal atomization method, the method can be used for preparing superfine spherical metal powder which is narrow in particle size distribution interval, high in sphericity, good in spreadability and liquidity, and high in production efficiency, and meets the 3D printing and using requirements.

The invention discloses a hydro-viscous drive test device with the friction plate number and oil film thickness controllable. The hydro-viscous drive test device comprises an upper box, a lower box, a driven disk, a driving disk, a driving friction plate and a driven friction plate. The hydro-viscous drive test device is characterized in that a supporting disk is added among the driving disk, the driving friction plate and the driven friction plate, four bolts are circumferentially welded on the supporting disk at equal intervals and locked by four lock nuts, meanwhile, gaskets with different thickness can be added between the supporting disk and the driving disk to change the clutch mounting space in a clutch, the friction plate group number is controllable, the four bolts are controlled to move horizontally, and the size of an oil film is controlled by changing the space in the clutch. The device is applicable to test research on the hydro-viscous drive technology and is simple in structure and good in sealing performance.

The invention relates to a method for preparing a constructed body from a biobrick containing endothelial cells, belonging to the technical fields of biology, regenerative medicine, biological printing (e.g., 3D biological printing), tissue engineering, etc. Particularly, the invention relates to a biobrick applicable to biological printing (e.g., 3D biological printing) and tissue engineering, a composition (e.g., biological ink) including the biobrick, a preparation method and application of the biobrick and the constructed body (e.g., a three-dimensional constructed body) including the biobrick or constructed by using the biobrick/biological ink. The biobrick comprises cells, a core wrapping cells (e.g., endothelial cells), and a shell encapsulating the core.

The invention discloses a preparation method and application of a vascular plant based porous oxidative polymerization chelating adsorption material. The adsorption material takes a porous vascular plant as the carrier, and is grafted with a lot of amidoxime groups. The preparation method includes: subjecting the vascular plant to oxidation treatment, then conducting coupling with a double-bond equipped silane coupling agent, then carrying out free radical polymerization reaction with acrylonitrile under the action of an initiator, and finally converting part of a nitrile group into an amidoxime group through hydroxylamine, thus obtaining the adsorption material. The adsorption material has strong hydrophilicity, abundant porous structure and numerous amidoxime groups, and can be applied to removal of heavy metals or radioactive metallic elements from wastewater. The adsorption material shows the characteristics of high adsorption capacity, strong adsorption ability, reproducibility and reusability, and good reuse effect, and is especially suitable for adsorption removal of lead, cadmium, uranium and other metals from wastewater.

The invention relates to the technical fields of biology, regenerative medicine, biological printing (e.g., 3D biological printing), tissue engineering, etc. Particularly, the invention relates to a biobrick applicable to biological printing (e.g., 3D biological printing) and tissue engineering, a composition (e.g., biological ink) including the biobrick, a preparation method and application of the biobrick and a constructed body (e.g., a three-dimensional constructed body) including the biobrick or constructed by using the biobrick/biological ink. The biobrick comprises cells, a core wrapping cells (e.g., endothelial cells), and a shell encapsulating the core.

The invention discloses a design method of a V-shaped beam mask plate. The method comprises the following steps: (1) derivating an electric field expression formula Vpepsilon of a V-shaped beam basedon an accurate orthogonality solution of a space paraxial wave equation in an oval coordinate system; (2) solving an angular function by virtue of the electric field expression formula Vpepsilon, so as to obtain angle(Vpepsilon), and combining with blazed grating P0, so as to obtain angle(Vpepsilon)+P0; and (3) carrying out computer coding by virtue of a computer-generated holography principle, soas to obtain a specific expression formula (shown in the description) of a re-transmittance function of the V-shaped beam mask plate, wherein a mask plate described by the re-transmittance function is the V-shaped beam mask plate. The mask plate disclosed by the invention is capable of emitting a V-shaped beam including V-shaped pedals; the number of the V-shaped pedals can be controlled and is twice of an order p; the optical structure is remarkably simplified; and therefore, the mask plate has very important application prospects in a cell sorting technique.

The invention discloses a preparation method of a deuterated chemical. The method includes subjecting a halohydrocarbon compound and a deuterium source to dehalogenation and deuteration reactions under the co-catalysis of an electric field and a catalyst to obtain the deuterated chemical, wherein the deuterium source is one or more of deuterated water, a deuterated alcohol compound and a deuterated acid compound. The environmentally friendly and cheap deuterated water or deuteration agents are adopted as the deuterium source, in place of deuterium gas, and the fixed-point selective deuterationreaction of the halohydrocarbon is achieved under mild conditions under the function of electro-catalysis. Compared with the traditional deuteration reactions, the method has higher selectivity, milder reaction conditions, and more economic applicability, and is suitable for large-scale production of deuterated chemicals.

The invention relates to the technical fields of biology, regenerative medicine, biological printing (e.g., 3D biological printing), tissue engineering, etc. Particularly, the invention relates to a biobrick applicable to biological printing (e.g., 3D biological printing) and tissue engineering, a composition (e.g., biological ink) including the biobrick, a preparation method and application of the biobrick and a constructed body (e.g., a three-dimensional constructed body) including the biobrick or constructed by using the biobrick/biological ink. The biobrick comprises cells, a core wrapping cells (e.g., endothelial cells), and a shell encapsulating the core.

The invention discloses a portrait image generation method and device, a readable medium and electronic equipment, and is applied to the field of image generation. By controlling the target noise vector input into the network unit of the generator, the feature quality of the generated portrait image library is qualified, the richness is sufficiently generalized, and the number is sufficiently sufficient. Specifically, the method comprises the following steps: acquiring a plurality of random noise vectors; carrying out nonlinear transformation on the plurality of random noise vectors to obtaina plurality of target noise vectors, wherein the plurality of random noise vectors are in one-to-one correspondence with the plurality of target noise vectors; according to the multiple target noise vectors, obtaining multiple sets of vector sequences, wherein the number of the target noise vectors contained in each set of vector sequence is n, the target noise vectors contained in different vector sequences are different, and n is a positive integer larger than or equal to 2; and generating a plurality of human image images based on the plurality of groups of vector sequences, wherein the plurality of groups of vector sequences are in one-to-one correspondence with the plurality of human image images. Specifically, the method is applied to a scene of generating a portrait image.

The invention discloses a method for data transmission by using multivariate polar codes. probability, the upper limit of the error probability of the combined multiple channels is obtained; the K channels with the smallest upper limit of the error probability in the combined multiple channels are used to transmit information bits; The number is controllable, so that the complexity of coding during data transmission can be controlled. Since multi-polar codes are used, information loss during high-order modulation and demodulation can be reduced.

The invention relates to a medical field, and discloses a method for co-preparing plant oil-based isocyanate by a mercapto-alkene click reaction and a Curtius rearrangement reaction, comprising: (1) preparation of plant oil-based polyprotic acid, (2) preparation of plant oil-based acyl chloride, and (3) preparation of plant oil-based acid azide and isocyanate, to obtain a target product. Aiming at disadvantages of the current plant oil-based isocyanate preparation technology, the invention provides a preparation method of plant oil-based isocyanate with simpleness, easy operation, controllable NCO number and high reaction yield.

The invention provides a specific metal nanowire. The specific metal nanowire comprises a linear nanowire matrix, an isolating layer and a binding body, wherein the binding body is used for being coupled with a single DNA molecule, the isolating layer coats the outside surface of the nanowire matrix, and the top end of the nanowire matrix is connected with the binding body. The invention further provides a method for producing the specific metal nanowire. According to the method, the drawbacks that most existing single molecule manipulation techniques can only be used for binding a large amount of DNA single strands but cannot be used for capturing single DNA in a DNA sequencing process and a technique which can be used for controlling a single DNA single strand to pass through a nanoporerequires perforation and is high in production cost are overcome, a target of controlling a single DNA single strand to pass through a nanopore is achieved, a perforation step is omitted, facility requirements are reduced, and the production cost is low.

The invention relates to a preparation method of a core-shell structure, namely, a biological brick for biological printing (such as 3D biological printing) and tissue engineering. The method comprises the steps as follows: a) providing a hydrophobic surface, preferably, a super-hydrophobic surface; b) dropping a core material solution to the hydrophobic surface in step a) to form a droplet so as to obtain a core-shell structure on the innermost side; c) optionally, dropping the core material solution to the formed droplet surface to obtain another core-shell structure; d) optionally, dropping a wall material solution to the formed droplet surface to obtain a shell structure; e) optionally, repeating step c) and/or step d) one or more times or alternately performing step c) and step d) one or more times; f) dropping the wall material solution to the formed droplet surface to obtain a shell structure on the outermost side, wherein the core material or wall material contained in each core or shell is selected independently.