508results about How to "Effective immobilization" patented technology

The invention discloses a preparation method of a three-dimensional reduced graphene oxide/polyaniline composite material, which comprises the following steps: 1) uniformly stirring a graphene oxide raw material and deionized water in a reactor to obtain a graphene oxide dispersion solution; 2) adding aniline, stirring uniformly, adding medium acid, stirring uniformly under ice bath conditions, and adding an initiator; filtering the reaction product, washing the filter residue, and drying to obtain a graphene oxide/polyaniline composite material; and 3) uniformly mixing the graphene oxide/polyaniline composite material with the graphene oxide dispersion solution, putting in a closed reactor, carrying out hydrothermal reaction to form a three-dimensional reduced graphene oxide polyaniline/composite material aquagel, and drying to obtain the three-dimensional reduced graphene oxide/polyaniline composite material. The polyaniline nano particles are uniformly dispersed among the reduced graphene oxide sheets to form the three-dimensional network-structure composite material. The composite material has the advantages of large specific area, high electric conductivity and high structural stability of polyaniline.

The invention discloses a backlight module and a liquid crystal display comprising the backlight module. The backlight module at least comprises a backboard, at least one light source, at least two supporting frameworks and at least one optical film, wherein the backboard at least comprises a base plate and a plurality of lateral plates surrounding the edge of the base plate; at least one light source is arranged on the backboard; at least two supporting frameworks are arranged on two relative sides of the backboard respectively; at least one optical film is arranged on the light source, and the optical film is provided with at least two fixed hole respectively corresponding to the supporting frameworks; and the supporting frameworks are inserted into the fixed holes respectively so as toprovide at least one pair of tensile force for the optical film.

The invention belongs to the field of immobilization of proteins, and relates to preparation and application of a dopamine functional magnetic nano-carrier. The preparation comprises the following steps: firstly, dissolving FeSO4.4H2O and FeCl3.6H2O into distilled water, high-speed stirring and under protection of nitrogen, adding ammonia water of 25% NH4OH, and adding oleic acid; secondly, repeatedly cleaning black precipitates obtained by a stirring reaction and then using a strong magnet to perform precipitation separation, and drying to obtain oleic acid magnetic nano-particles; and finally, adding the oleic acid magnetic nano-particles into a dopamine hydrochloric acid solution, after the reaction is over, using a magnet to separate, cleaning and drying obtained deep brown precipitates, and then the dopamine functional magnetic nano-carrier can be obtained. According to the preparation and application of the dopamine functional magnetic nano-carrier provided by the invention, dopamine hydrochloride is adopted for modifying magnetic oleic acid nano-particles, so that the surface of a magnetic nano-particle has a plentiful of quinonyls and amidogen functional groups, thus proteins can be effectively immobilized; besides, the surface of the carrier has a layer of soft poly dopamine oxide films, the surface area is larger, and the preparation method is simple.

The invention discloses a heavy metal precipitator. It conquers the disadvantages of low utilization factor of raw material, and weak complexation ability, incompact wadding and slow speed to deposit existed in the heavy metal precipitator in existing.Especially for the stability complexation heavy metal ion wasting water, it can remove stability heavy metal ion. Moreover, it has decolor function and can be used in the process for heavy metal ion.

The invention relates to a carbon-carbon multi-component negative electrode material. The carbon-carbon multi-component negative electrode material is mainly composed of flexible graphite, nanometer silicon and amorphous carbon which respectively account for 30-60%, 30-50% and 10-30% based on mass percent, the amorphous carbon is obtained through high-temperature pyrolyzation of an organic carbon source, and the flexible graphite is obtained by applying pressure to expanded graphite. A preparation method of the product comprises the steps of: firstly, preparing an expanded graphite/silicon-silicon dioxide/carbon composite negative electrode material through high-temperature pyrolyzation; secondly, pouring the expanded graphite/silicon-silicon dioxide/carbon composite negative electrode material into a mould and applying pressure to obtain a flexible graphite/silicon-silicon dioxide/carbon composite negative electrode material; thirdly, processing silicon dioxide to obtain a flexible graphite/silicon/carbon composite negative electrode material through etching by a corrosive liquid; and finally, using asphalt to permeate a gap inside the flexible graphite/silicon/carbon composite negative electrode material in a protective atmosphere, and obtaining the product after high-temperature heat treatment and repetition. The carbon-carbon multi-component negative electrode material has the advantages of high capacity, high coulombic efficiency, good cycle performance, structure stability, high reversible capacity and the like.

The invention relates to a preparation method of a high-temperature-resisting aerogel material. The method comprises the following steps: (1) preparing sol; (2) carrying out a nano-crystal assemblingprocess to prepare aerogel wet gel which takes an oxide nano-crystal as a framework; (3) preparing an aerogel material; (4) carrying out a heat treatment process to prepare the high-temperature-resisting aerogel material. According to the preparation method provided by the invention, a nano-crystal assembling technology and heat treatment are combined to prepare the high-temperature-resisting aerogel material with a microcosmic core-shell structure; the core-shell structure forms a network framework under high temprature so that the growth of the oxide nano-crystal is inhibited and the shrinkage problem caused by the fact that the structure of oxide aerogel collapses in a high-temperature utilization process is effectively solved. The aerogel material prepared by the preparation method hasa good high-temperature-resisting property; the heat-resisting temperature is 1000 DEG C or more and the high-temperature-resisting aerogel material even can bear the high temperature of 1300 DEG C or more.

The present invention relates to an electrochemical biosensor for detecting hydrogen peroxide, a preparation method and an application thereof. The preparation method comprises the steps of (1) synthesizing the silica-three-dimensional graphene composite material; (2) doping nitrogen and carbon into the synthesized silica-three-dimensional graphene composite material; (3) pretreating a glassy carbon electrode; (4) preparing the glassy carbon electrode modified by the nitrogen-carbon-doped silica-three-dimensional graphene composite material through the dispensing method; (5) putting the glassy carbon electrode into a chloroauric acid solution to prepare gold nanoparticle-nitrogen-carbon-doped silica-three-dimensional graphene glassy carbon electrode through chronoamperometry; (6) dipping the glassy carbon electrode into a double-sulfhydryl-modified GDNA solution and cultivating for 2-4 hours; (7) dipping the composite electrode into a hemin solution for 10-14 hours. The electrochemical biosensor is good in stability and reproducibility, high in specificity and sensitivity, fast and simple and convenient to operate. The electrochemical biosensor can be used for detecting the content of hydrogen peroxide in biological samples, cosmetics and the like.

The invention relates to an automatic turret-type nozzle replacing device of a laser cutting machine, in particular to an automatic turret-type nozzle replacing device which is simple in structure, convenient and rapid for replacing a nozzle and capable of increasing the working efficiency. The laser cutting machine comprises a worktable, a cutting head and a nozzle, wherein the nozzle is detachably connected onto the cutting head; and any corner of the worktable is provided with the automatic nozzle replacing device, and the automatic nozzle replacing device comprises a turntable, a nozzle receiving component, a box body, a transmission shaft, an elevation air cylinder and a gear transmission mechanism. The automatic turret-type nozzle replacing device is unnecessary to operate by an operator, especially under an automatic running mode, so that the non-production time is shortened, the working efficiency is increased, and the cost is saved.

The invention discloses a test method and a test device for simulating natural inhomogeneous rusting of a reinforcing steel bar in concrete. The method comprises the following steps: pre-burying stainless steel wires in concrete, and supplying constant-current power for electrolytic reaction to a concrete test piece. The test device comprises a mold unit, a stressing unit, a test piece to be tested and a power supply unit, wherein the mold unit comprises a mold for casting the test piece to be tested, a through hole bolt and a fastening bolt; the stressing unit comprises a bracket, a lower fulcrum, an upper fulcrum, a loading screw rod and a popping bolt; the test piece to be tested comprises a concrete base body, a reinforcing steel bar and a stainless steel wire electrode; the power supply unit adopts a voltage-stabilizing current-stabilizing direct-current power supply. The test method and the test device have the benefits that the test period is short, natural inhomogeneous rusting of the reinforcing steel bar can be effectively simulated, the position, the rusting range and the rusting degree of inhomogeneous rusting in the circumference direction, and inhomogeneous rusting in the length direction of the reinforcing steel bar can be effectively controlled, energy loss caused by concrete resistance can be reduced, and the prediction result precision is high.

The invention relates to a dust remover and a bag cage of the dust remover. The bag cage comprises inner longitudinal ribs assembled at the inner side of a filter bag, and outer longitudinal ribs assembled at the outer side of the filter bag, wherein the inner longitudinal ribs are positioned at the outer sides of the outer longitudinal ribs; the inner longitudinal ribs and the outer longitudinal ribs are distributed at intervals in a staggered manner and are used for enabling the cross section of the filter bag assembled between the inner longitudinal ribs and the outer longitudinal ribs to be in a polygonal star shape. During use of the dust remover, the cross section of the filter bag is replaced by the polygonal star shape from a traditional round shape, so that the filtering area is enlarged under the same distribution space; as the filtering area is enlarged, the air passing amount in the unit area of the filter bag is reduced under the same air passing amount condition, and furthermore the abrasion and the corrosion to the filter bag are reduced; the relatively effective supporting and fixing can be provided for the filer bag due to a double-layer structure formed by the inner longitudinal ribs and the outer longitudinal ribs, so that the deformation and the loosing of the filter bag can be avoided, the filtering effect is improved, and the service life of the filter bag is prolonged.

The invention discloses a synchronous denitrification and dephosphorization sewage treatment device for an immobilized microorganism CASS (cyclic activated sludge system). The synchronous denitrification and dephosphorization sewage treatment device comprises a pond. A water inlet tube is arranged at one end of the pond, a water outlet tube is arranged at the other end of the pond, a hollow gridding reaction box is disposed in the pond, immobilized microorganism carriers are arranged in the hollow gridding reaction box, and an aeration device is arranged at the bottom of the pond. The synchronous denitrification and dephosphorization sewage treatment device aims to overcome shortcomings in the prior art, is simple in structure, and is efficient and stable.

The invention relates to a novel membrane coupled anaerobic bioreactor, comprising an baffle plate anaerobic reactor and a tubular membrane ultrafiltration device; a water outlet of the baffle plate anaerobic reactor is communicated with a water inlet of the tubular membrane ultrafiltration device by pipelines, and a water return port of the tubular membrane ultrafiltration device is communicatedwith a water inlet of the baffle plate anaerobic reactor by pipelines; when treating wastewater, the wastewater flows in from the water inlet of the baffle plate anaerobic reactor and the water inletof the tubular membrane ultrafiltration device, then the wastewater after being treated flows out from a discharge port of the tubular membrane ultrafiltration device, and anaerobic activated sludge which is generated when the tubular membrane ultrafiltration device treats the wastewater reflows to the water inlet of the baffle plate anaerobic reactor. The reactor and the method can separate and fix microorganisms completely, ensure the microorganism concentration in a reaction chamber to be much more than the concentration in a normal anaerobic device, improve the anaerobic treating effect, quicken the anaerobic reaction speed greatly, shorten the residence time of the wastewater effectively and prolong the residence time of the sludge greatly.

The invention discloses a preparation method of chalcogenide glass tapered fibers. Chalcogenide glass fibers are tapered by the aid of accurate temperature control of a specific electric-heating coil and traction of a precision stepping motor, important parameters such as taper zone lengths, taper zone outer diameters and the like of the tapered fibers are controlled through control on the heating temperature and the tapering traction speed, and the chalcogenide glass tapered fibers with different taper zone lengths and taper zone outer diameters are drawn accurately. The method is simple in technology, high in operability, good in repeatability and high in accuracy and can effectively solve problems that the chalcogenide glass fibers are broken easily during tapering, fiber core diameters and taper zone lengths are difficult to control accurately and the like, the fiber core diameters of the prepared chalcogenide glass tapered fibers with nanoscale or submicron diameters range from 700 mu m to 1,000 mu m, the taper zone lengths range from 3 cm to 7 cm, the production cycle is short, the success rate is high, the chalcogenide glass tapered fibers can be applied to new technical fields of coupling of micro-waveguides, generation of super-continuum spectrum and the like, and research and application fields of the chalcogenide glass tapered fibers are greatly extended.

The invention relates to a high-strength polypeptide hydrogel preparation method and belongs to the field of chemical preparation. The high-strength polypeptide hydrogel preparation method includes (1) selecting polypeptide molecules, which are provided with positive charges and capable of forming long fiber structures by self-assembly, to prepare an aqueous solution, mixing uniformly ultrasonically and standing so as to enable the aqueous solution to form the long fiber structures by self-assembly; (2) adding GO (graphene oxide) lamellas into the solution of the long fiber structures, mixing uniformly ultrasonically, regulating a pH (potential of hydrogen) value, standing and forming hybrid hydrogel after a system is aged and stabilizes. The high-strength polypeptide hydrogel preparation method has the advantages that the GO lamellas are introduced into the polypeptide hydrogel, and gelling capability of the system is improved, so that a high-strength polypeptide/GO hybrid hydrogel material is obtained; properties of mechanical strength, aperture size and the like of the polypeptide/GO hybrid hydrogel can be controlled by controlling the size, surface charge density and surface charge concentration of the GO lamellas.

The invention relates to a novel assembly type steel structure adjustable force transmission beam, and belongs to the technical field of steel structures. The novel assembly type steel structure adjustable force transmission beam comprises an I-shaped steel column, a notch of the I-shaped steel column is slidably connected to an installing bracket through a sliding piece, the notch of the I-shaped steel column is provided with angle steel through a fastening assembly, a connecting assembly used for fixedly connecting the installing bracket is arranged between the angle steel and the installing bracket, a steel cross beam is arranged on the installing bracket, and a limiting mechanism used for fixedly limiting the steel cross beam is arranged between the steel cross beam and the installing bracket. According to the novel assembly type steel structure adjustable force transmission beam, the effects of rapidly positioning and rapidly assembling the steel beam can be achieved, therefore the steel beam is stably installed on the I-shaped steel column, and when an earthquake occurs, the steel cross beam can be effectively buffered, so that the steel cross beam can bear a certain anti-seismic property.

The invention discloses a multi-temperature-regulation massaging device for hemodialysis. The multi-temperature-regulation massaging device for hemodialysis has powerful functions and can be used for effectively heating and keeping heat of a punctured blood vessel of a hemodialysis patient and promoting hemangiectasis, and the puncturing success rate is improved; the punctured blood vessel of the patient can be massaged through simple operation, edema liquid of a punctured part is eliminated and the blood vessel is exposed, so that the puncturing success rate is improved and pains of the patient are alleviated. The hematoma of the punctured part of the patient can also be subjected to cooling treatment and blood capillaries are retracted through cold application, so that partial hyperemia and bleeding are alleviated and the limitation of edema is facilitated. The device is used for carrying out hot application and massaging on the punctured parts including internal fistula and the like of the patient in combination with corresponding medicines, and partial blood circulation can be facilitated; the permeability of tissue cells is improved and the medicines can be easily absorbed; the elimination of the hematoma is accelerated and the absorption of the hematoma is promoted; damaged tissues are stimulated to regenerate and scars are softened; an vascular access of the patient is effectively protected and the living quality of the patient is improved.

The invention provides a concrete production process. According to the invention, concrete is produced by mixing of the following components: 40-70 parts by weight of road milling waste, 10-20 parts by weight of construction waste made aggregate, 1-15 parts by weight of steel slag micropowder, 15-30 parts by weight of cement, 0.02-0.2 parts by weight of an admixture, and 10-50 parts of water. The milling waste is grading aggregate made from asphalt concrete pavement milling waste. The process can fully reuse pavement milling materials, construction waste and steel scrap so as to obtain desirable concrete at low production cost.

The invention discloses a nano-crystalline cellulose based 3D printing lactobacillus embedding material as well as a preparation method and application thereof. The method comprises the following steps of adding sodium alginate in a nano-crystalline cellulose solution, uand performing uniform mixing and centrifuging to obtain a mixed solution; adding chitosan in water, performing uniform mixing, and adding glacial acetic acid to obtain a chitosan solution; adding lactobacillus powder in the chitosan solution, and performing uniform mixing to obtain a chitosan-lactobacillus bacterial suspension; taking the mixed solution as an outer material, and the chitosan-lactobacillus bacterial suspension as an inner material, and performing 3D printing to obtain a printing product; and spraying the surface of the printing product with a calcium chloride solution, and performing curing and cold drying to obtain the nano-crystalline cellulose based 3D printing lactobacillus embedding material. For the nano-crystalline cellulose based 3D printing lactobacillus embedding material, the lactobacillus is immobilized by taking the nano-crystalline cellulose and the chitosan as carriers, so that efficient continuous cyclic fermentation of yogurt can be realized, and the problems of difficulty in preservation of lactobacillus, low utilization rate and high cost can be solved.

The invention belongs to the technical field of environment pollution biological treatment, relates to a microorganism repair technology and in particular relates to a method for enrichment and removal of caesium polluted environmental microorganisms. In the method, heavy metal resisting strain Burkholderia sp.D54 selected and separated from soil polluted by heavy metal is applied to repair of microorganisms polluted by radionuclide caesium. The strain Burkholderia sp.D54 can be grown in a culture medium containing 50mM of caesium; the strain Burkholderia sp.D54 is cultured in a culture medium containing 1mM of caesium for 3 days so that 0.1737+/-0.0017g of thallus by dry weight; and the enrichment amount of the caesium reaches 45+/-3.85mg g<-1> (dry weight thallus), and the removal rate of the caesium in the culture medium is 58.77%. The strain Burkholderia sp.D54 has strong appetency on radionuclide and can be applied to the repair of the environmental microorganisms polluted by the radionuclide caesium, thus the prospect of the strain is wide.

The invention provides a horizontal positioning device for a prefabricated stand column. The horizontal positioning device comprises a positioning frame (1), wherein the positioning frame (1) is defined by side walls on the periphery, and the center of the positioning frame (1) is of a hollow frame-shaped structure. The lower portion of the positioning frame (1) is connected to a horizontal position, where the prefabricated stand column needs to be positioned, of a bearing platform in a positioned mode. The shape of the inner edge of the positioning frame (1) is identical or approximately identical to the shape of the cross section of the prefabricated stand column. The area defined by the inner edge is identical or slightly larger than the cross sectional area of the prefabricated stand column. According to a steel bar jig frame manufactured through the horizontal positioning device, and precise positioning and positioning correction of the prefabricated stand column in the horizontal direction can be effectively achieved, so that when the prefabricated stand column and the bottom bearing platform are spliced, the positioning precision of the horizontal position of the prefabricated stand column is high, and control operation is easy and convenient. The invention further relates to a positioning and installing method of the horizontal position of the prefabricated stand column through the horizontal positioning device for the prefabricated stand column.

The invention discloses a non-embedded type remote monitoring intelligent door lock. The non-embedded type remote monitoring intelligent door lock comprises an intelligent door lock, a mobile terminaland a control center. The control center is connected with the intelligent door lock and the mobile terminal. The intelligent door lock comprises a lock body and a control panel. A control system isarranged in the lock body, and comprises a first processor, a power module, a USB interface module, a first GPS positioning module, a login module, a lock plunger control module, an alarm module, an infrared sensor, a first network module and an anti-theft module. The non-embedded type remote monitoring intelligent door lock has the beneficial effects that the design is reasonable, use is convenient, compared with an existing intelligent door lock, the effect of simultaneously positioning and managing the mobile terminal and the intelligent door lock can be achieved, the safety effect can alsobe achieved, and therefore the property safety of residents is effectively guaranteed while convenience is brought to use by people.

The invention provides a fan-out type wafer level encapsulation structure and a preparation method thereof. The encapsulation structure comprises at least a rewiring layer; at least one flip chip with a bump protection structure embedded in the upper surface of the rewiring layer and at least two first bumps formed on the upper surface of the rewiring layer; a plastic encapsulation layer of the flip chip formed on the upper surface of the rewiring layer and filled with the bump protection structure, a joint gap between the rewiring layers and the flip chip with the bump protection structure and part of the first bumps; and a second bump formed on the lower surface of the rewiring layer. The plastic encapsulation layer provides a seamless bonding and an excellent connection structure for the flip chips and the rewiring layers, the risk of boundary separations is avoided, and the reliability of the plastic encapsulation structure is increased; meanwhile the flip chips with the bump protection structures are adopted so that bumps are effectively protected and fixedly interconnected, and the interconnected bumps are prevented from losing efficacy.