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37results about How to "Control interaction" patented technology

Method for guiding fixed-point cell growth by preparing chemical micro-patterns on surfaces of various materials

The invention discloses a method for guiding fixed-point cell growth by preparing chemical micro-patterns on the surfaces of various materials. The preparation process comprises the following steps of: 1) hydroxylating the surfaces of a glass sheet, a quartz sheet, a silicon sheet, a transition metal oxide and the like and coating dopamine on the surface of polymer or other inorganic materials; 2) obtaining dense anti-protein adsorption films on the pretreated surfaces by molecular self-assembly or an atom transfer radical polymerization method, wherein the dense anti-protein adsorption films are polyethylene glycol films or polyethylene glycol methacrylate films; and 3) covering mask plates on the anti-protein adsorption films, performing ultraviolet irradiation and adding fibronectin to obtain protein micro-patterns; and inoculating cells to obtain the cell patterns. The method has the advantages of simple operation, low cost, mild preparation conditions and no need of super clean experimental conditions. By adopting the method, stable and high-selectivity cell micro-patterns can be obtained on the surfaces of various materials; and the method has a broad application prospect in the fields of basic researches on cell biology, tissue engineering, drug screening and cell-based biosensors.
Owner:SOUTHEAST UNIV

Method for semi-continuously preparing TiAl base alloy automobile air valve and components with similar shape

The present invention relates to preparative technique for automobile air valve and parts of similar shape, specifically speaking, the present invention is a semi-continuous method for preparing TiA1-based alloy automobile air valve and parts of similar shape. The present invention adopts the method of vacuum pouring after semi-continuous induction melting in a vacuum pouring furnace: take the spongy titanium, industrial pure aluminum and other alloy elements as the raw materials and adopt a CaO formed ceramic pot for vacuum induction melting; the cast shell mold consists of part mold shell such as air valve, etc., intermediate flow trays and a vacuum pouring pipe; the intermediate flow trays are evenly distributed in the lengthwise direction of the air valve part; the technique parameters of the vacuum pouring are that the shell mold temperature is between 50 to 800 Celsius degrees and the vacuum pouring pressure difference is2.0 multiplied by 104-7.0 multiplied by 104Pa. The present invention can semi-continuously produce parts which have complicated shapes and are hard to be formed with high-melting point, high-activity Ti A1-based materials and the cost is low; in addition, the produced automobile air valve boasts of excellent internal quality and stable casting performance.
Owner:INST OF METAL RESEARCH - CHINESE ACAD OF SCI

Thermal treatment modification method for PBO (Poly-p-phenylene ben-zobisthiazole) fibers

The invention relates to a thermal treatment modification method for PBO (Poly-p-phenylene ben-zobisthiazole) fibers, and belongs to the technical field of macromolecular fiber modification. The thermal treatment modification method for the PBO fibers comprises entering a thermal treatment channel, a preheating section, a thermal treatment section and a cooling section. According to the thermal treatment modification method, the PBO fibers enter the sectional type thermal treatment channel through a tension roller; the preheating section and the cooling section which are additionally arranged in the sectional type thermal treatment channel have an important role in improving the intensity and the modulus of the fibers; as water has a plastification effect, in a preheating process of the preheating section, movement of a molecule chain is facilitated, the mutual action between the specific moisture content and the preheating section is controlled, and the crystallizing degree and the orientation degree of the fibers in the thermal treatment section are improved; finally, due to the cooling section additionally arranged in the sectional type thermal treatment channel, the fibers subjected to thermal treatment can be effectively prevented from being directly exposed in the air, so that high-temperature thermo-oxidative degradation of the fibers in hot air is effectively reduced, and the intensity and the modulus of the treated fibers are greatly improved.
Owner:CHINA BLUESTAR CHENGRAND CO LTD

Method for semi-continuously preparing TiAl base alloy automobile air valve and components with similar shape

The present invention relates to preparative technique for automobile air valve and parts of similar shape, specifically speaking, the present invention is a semi-continuous method for preparing TiA1-based alloy automobile air valve and parts of similar shape. The present invention adopts the method of vacuum pouring after semi-continuous induction melting in a vacuum pouring furnace: take the spongy titanium, industrial pure aluminum and other alloy elements as the raw materials and adopt a CaO formed ceramic pot for vacuum induction melting; the cast shell mold consists of part mold shell such as air valve, etc., intermediate flow trays and a vacuum pouring pipe; the intermediate flow trays are evenly distributed in the lengthwise direction of the air valve part; the technique parameters of the vacuum pouring are that the shell mold temperature is between 50 to 800 Celsius degrees and the vacuum pouring pressure difference is2.0 multiplied by 104-7.0 multiplied by 104Pa. The present invention can semi-continuously produce parts which have complicated shapes and are hard to be formed with high-melting point, high-activity Ti A1-based materials and the cost is low; in addition, the produced automobile air valve boasts of excellent internal quality and stable casting performance.
Owner:INST OF METAL RESEARCH - CHINESE ACAD OF SCI

Blue light ionic type iridium complex as well as preparation method and application thereof

The invention relates to a blue light ionic type iridium complex as well as a preparation method and application thereof. The complex takes an iridium complex as a luminescent center and is formed bythe coordination of a main ligand and an auxiliary ligand. The complex takes iridium as a luminescent center, is formed by the coordination of a main ligand and an auxiliary ligand, and has a generalstructural formula shown in formula 1 (as described in the specification), wherein the structure of D is shown in formula 2; the auxiliary ligand N^N may independently be one of tetrabutylammonium cyanide, pyridine, 2,2'-bipyridine, and 1,10-phenanthroline; (as described in the specification), wherein n is more than or equal to 1 and less than or equal to 20, and is a natural number; and * is a connection position. The blue light ionic type iridium complex provided by the invention is simple in material preparation, easy in control of a reaction process, easy in purification and separation ofa product, and high in yield and purity. This kind of material has good solubility and can be used to prepare efficient organic light-emitting diodes and organic light-emitting electrochemical cell devices by a solution method; and the obtained devices show good thermal stability and film-forming stability and have a potential application value in the aspect of organic light-emitting devices.
Owner:NANJING UNIV OF POSTS & TELECOMM

A high-resolution biosensor

The invention discloses a high-resolution biosensor, which includes an atomic-scale conductive material as a sensitive unit to achieve atomic-level detection resolution and a micro-nano fluid device to control the motion and morphological structure of detected molecules. The second electrophoretic electrode or micropump, the second storage room, the second micro-nano separation channel, the substrate, the first insulating layer, the sensitive functional layer, the second insulating layer, the first micro-nano separation channel, the first storage room, the first The electrophoretic electrodes or micropumps are placed in sequence, the center of the sensitive functional layer is provided with nanopores, the center of the first insulating layer is provided with openings in the first insulating layer, the center of the second insulating layer is provided with openings in the second insulating layer, and the substrate A substrate opening is arranged in the center of the substrate, and an electrical contact layer for measuring electrical signals is arranged on the sensitive functional layer. The sensitive functional layer with an atomic layer thickness of the present invention enables the resolution of the sensor to reach the atomic scale, and the integration with the micro-nano fluidic device can control the movement and structure of DNA or RNA, so that stable signal detection can be obtained.
Owner:ZHEJIANG UNIV

Method for guiding fixed-point cell growth by preparing chemical micro-patterns on surfaces of various materials

The invention discloses a method for guiding fixed-point cell growth by preparing chemical micro-patterns on the surfaces of various materials. The preparation process comprises the following steps of: 1) hydroxylating the surfaces of a glass sheet, a quartz sheet, a silicon sheet, a transition metal oxide and the like and coating dopamine on the surface of polymer or other inorganic materials; 2) obtaining dense anti-protein adsorption films on the pretreated surfaces by molecular self-assembly or an atom transfer radical polymerization method, wherein the dense anti-protein adsorption filmsare polyethylene glycol films or polyethylene glycol methacrylate films; and 3) covering mask plates on the anti-protein adsorption films, performing ultraviolet irradiation and adding fibronectin toobtain protein micro-patterns; and inoculating cells to obtain the cell patterns. The method has the advantages of simple operation, low cost, mild preparation conditions and no need of super clean experimental conditions. By adopting the method, stable and high-selectivity cell micro-patterns can be obtained on the surfaces of various materials; and the method has a broad application prospect inthe fields of basic researches on cell biology, tissue engineering, drug screening and cell-based biosensors.
Owner:SOUTHEAST UNIV

A kind of heat treatment modification method of PBO fiber

The invention relates to a thermal treatment modification method for PBO (Poly-p-phenylene ben-zobisthiazole) fibers, and belongs to the technical field of macromolecular fiber modification. The thermal treatment modification method for the PBO fibers comprises entering a thermal treatment channel, a preheating section, a thermal treatment section and a cooling section. According to the thermal treatment modification method, the PBO fibers enter the sectional type thermal treatment channel through a tension roller; the preheating section and the cooling section which are additionally arranged in the sectional type thermal treatment channel have an important role in improving the intensity and the modulus of the fibers; as water has a plastification effect, in a preheating process of the preheating section, movement of a molecule chain is facilitated, the mutual action between the specific moisture content and the preheating section is controlled, and the crystallizing degree and the orientation degree of the fibers in the thermal treatment section are improved; finally, due to the cooling section additionally arranged in the sectional type thermal treatment channel, the fibers subjected to thermal treatment can be effectively prevented from being directly exposed in the air, so that high-temperature thermo-oxidative degradation of the fibers in hot air is effectively reduced, and the intensity and the modulus of the treated fibers are greatly improved.
Owner:CHINA BLUESTAR CHENGRAND CO LTD

Preparation and application of chitosan-encapsulated mesoporous carbon nano herbicide

The invention discloses a preparation method of a chitosan-encapsulated mesoporous carbon nano herbicide, which comprises the following steps: by using carboxylated mesoporous carbon nanoparticles asa carrier of the herbicide, strongly adsorbing herbicide molecules in the solution, and encapsulating the herbicide-loaded mesoporous carbon nanoparticles with chitosan in an acetic acid aqueous solution. The chitosan-encapsulated mesoporous carbon nano herbicide disclosed by the invention hardly releases obviously in an aqueous solution with a range from strong acidity to alkalinity, so that theabsorption of the herbicide in the gastrointestinal tract of a human body is greatly reduced. The mesoporous carbon nanoparticles have a good near-infrared light heat effect, wherein the encapsulatedherbicide molecules are gradually released under the condition of natural sunlight irradiation, and the nano herbicide shows an efficient weeding effect similar to that of an active component herbicide. The nano pesticide preparation disclosed by the invention is good in biocompatibility, low in cost, simple in preparation process and small in toxic and side effects on a human body, and the controlled release performance of the sunlight-responsive nano herbicide is realized.
Owner:NANJING UNIV
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