58results about How to "Mass preparation" patented technology

The invention discloses a preparation method of three-dimensional graphene or a composite system thereof. The preparation method comprises the steps of: by taking a transition metal elementary substance and/or a compound containing a transition metal element as raw materials, preparing a three-dimensional porous metal catalyst template through high-temperature reduction; growing the three-dimensional graphene by utilizing a chemical vapor phase deposition method to obtain the three-dimensional graphene with a catalyst framework; furthermore, etching the three-dimensional graphene with the catalyst framework to obtain three-dimensional graphene powder; and furthermore, compositing the three-dimensional graphene powder with metal, a macromolecular material, a biomolecular material and the like to form a composite material system. The preparation method is simple in technique, capable of fast and massively preparing high-quality and high-density three-dimensional graphene or composite material thereof, and has wide application prospects on the aspects of water treatment, biomedicines, energy generation and conversion and energy accumulation devices, static resistance, thermal management, heat conduction and dissipation, sensors, electromagnetic shielding, wave absorption, catalysis and the like.

A test device and a test method of fractured rock mass collapse and blockfall and fracture water inrush includes a fractured rock mass preparation device, a water source loading device, a surrounding rock pressurization device and a slide rail, wherein the fractured rock mass preparation device is fixed at one end of the slide rail, and the water source loading device is fixed on the other side of the slide rail. An opening is formed in the rock mass water storage structure, and the size of the opening is adapted to the size of the fractured rock mass; the surrounding rock pressurization device includes one bracket and a pressurization structure arranged below the bracket, and a space for accommodating the fractured rock mass is reserved below the pressurization structure; and the bottom support and the bracket are both movably installed on the slide rail.

The invention relates to a preparation method of a color filter film based on microfluidic and quantum dot technology. The preparation method comprises the steps that microfluidic templates are designed, liquid inlet holes and liquid outlet holes are prepared, quantum dot ink with different emission wave lengths is prepared, the quantum dot ink is injected into PDMS channels by using a microfluidic method and curing is performed, and a water oxygen barrier film with a Distributed Bragg Reflector (DBR) structure is prepared on the surface of the color filter film. The preparation method has a simple process, simple operation, a high speed, low cost, achievement of high color purity, high color rendering index and wide color gamut and a remarkable effect.

The invention relates to an antibacterial and antiviral hybrid peptide as well as a preparation method and application thereof. An amino acid sequence and a nucleotide sequence of the antibacterial and antiviral hybrid peptide are as shown in SEQ ID No. 1 and 2. A gene for coding the antibacterial and antiviral hybrid peptide is cloned to an expression vector pPICZ[alpha]A to obtain a recombinant vector, then Pichia pastoris is converted, methyl alcohol is used for inducing expression, and an expression product is purified to obtain the target antibacterial antiviral hybrid peptide. The antibacterial and antiviral hybrid peptide can prevent and kill various bacteria and viruses, has low probability of resistance, and therefore, can serve as an ideal antibiotic substituent, a people and livestock biological antibacterial and antiviral medicine, a feed additive, a preservative, a sanitizer or the like.

The invention relates to a connector for medical liquid-containing packages, in particular to infusion or transfusion bags comprising a connection element (1) provided with a channel-shaped opening (1c) in which a self-sealing membrane (8) is arranged. A breakable part (17) which is connected to the connection piece closes the channel-shaped opening. Above the membrane (8), said connection element is embodied in the form a connection piece (13) comprising an internal cone (14) and external thread (15), the membrane (8) being sealed for receiving a syringe cone shaft. The inventive connector makes it possible to inject an active substance by means of a conventional Luer lock syringe devoid of an injection cannula (needle).

The invention discloses a preparation method and an application of an Antrodia camphorate mycelium medium. The Antrodia camphorate mycelium medium is a liquid medium prepared by mixing a Grass-cultivated Ganodema lucidum extrct with glucose, maltose, a yeast extract, KH2PO4, MgSO4.7H2O and VB1 according to a certain ratio. The Antrodia camphorate mycelium medium enables Antrodia camphorate mycelia to have the characteristics of fast germination, large quantity and rapid growth, enables the polysaccharide content and the triterpene content of the mycelia to reach 0.43-0.97% and 0.2-0.41% respectively and be two times that of mycelia cultivated by traditional mediums, and provides a new method for providing a large amount of Antrodia camphorate mycelia in practical production. The preparation method of the Antrodia camphorate mycelium medium has the advantages of simplicity, strong repeatability, and simple and easy operation.

Provided is a cable connecting device including a conductive casing. The conductive casing encloses a first core wire fixing member and a second core wire fixing member for fixing a first data cable and a second data cable, and a connecting device electrically connecting the core wire of the first data cable to that of the second data cable, moreover, the conductive casing is electrically connected with shielding members of the two cables. The connecting device includes a plurality of conductive connecting elements which are provided with first contact areas and second contact areas communicated with the core wire contacts of the first cable and the second cable. The core wire fixing members are provided with a plurality of placing areas on which core wire end areas can be arranged. The core wire fixing member is inserted into the casing, and the first contact areas of the connecting elements are respectively jointed into the placing areas of the first core wire fixing member, and the second contact areas are respectively jointed into the placing areas of the second core wire fixing member. The core wire fixing members are respectively maintained on cable fixing members, the cable end areas can be fixed on the cable fixing members, and shielding contact elements are maintained on the cable fixing members to establish the conductive connection between the shielding members of the cables and the casing.

The invention relates to a light emitting diode lamp shade which can be in injection or extrusion molding by utilizing intramode transfer printing film; the lamp shade is characterized in that: the intramode transfer printing film can be combined and molded at the light emitting diode in the method of continuous plastic injection or extrusion molding; the intramode transfer printing is that an intramode transfer printing film can be printed and completed rapidly through a printing machine or a printer or other output equipment; a parting layer, a printing layer with selective phosphor material and an adhesion layer is formed at a substrate underlayer of the intramode transfer printing film by using a printing contraposition method in sequence; thereby the light emitting diode which is composed of the lamp shade and a blue light diode chip can generate white light, or which also can be used in re-imprinting various appointed pigment ink layers on the printing layer, so that various color lights can be generated. The light emitting diode lamp shade has the advantages of lowering cost in mass production, long service life and good heat dissipation effect.

The invention relates to a production method of polylactic acid-trimethylene carbonate nano-fiber film. The method includes: dissolving PDLLA-PTMC (poly-DL-lactic acid and poly trimethylene carbonate) into organic solvent to obtain spinning dope, performing electrospinning, collecting fiber film, and vacuum-drying to obtain the polylactic acid and trimethylene carbonate nano-fiber film. The PDLLA-PTMC is 10%-25%w/w in the spinning dope in terms of concentration. The produced nano-fiber film is shape memory film featuring imitated natural extracellular matrix, and can provide cells with an ideal microenvironment for growth, proliferation and differentiation.

The invention discloses a preparation method of a MnAsP compound with efficient room temperature magnetic refrigeration performance. The preparation method is characterized in that: a room temperature magnetic refrigeration material with large grain size distribution and high comprehensive refrigeration performance can be quickly prepared by taking high-purity metal Mn and non-metal As, and P element as raw materials, taking argon as a protective gas, and adopting a mechanical alloying (ball milling) method. The preparation method of the MnAsP compound with efficient room temperature magneticrefrigeration performance can quickly prepare the MnAs compound with large grain size distribution and partially nano-crystallized grains in a large amount. Simultaneously, the preparation method obtains a magnetic refrigeration effect that the magnetic entropy change reaches 11.3J/kg.K in room temperature range under a 2T magnetic field. At the same time, the thermal lag can be reduced to 2K andcan reach requirements on actual room temperature magnetic refrigeration application.

The invention discloses a thin-layer boron nitride nano-sheet preparation method, which comprises: mixing a boron nitride raw material and an intercalator, putting into a sealed environment, heating,and carrying out an intercalation reaction, so that the intercalator molecules are partially or completely inserted into the layered structure of the boron nitride to form intercalated boron nitride;and vaporizing or decomposing the intercalator molecules in the intercalated boron nitride to generate gas, or carrying out a reaction on the intercalator molecules in the intercalated boron nitride and a selected chemical substance to generate gas, so the boron nitride lamellas are subjected to cleaving and stripping so as to obtain the thin-layer boron nitride nano-sheet. Compared with the method in the prior art, the preparation method of the invention has the following characteristics that the low-cost, rapid, efficient and large-scale preparation of boron nitride nano-sheets can be achieved, and the prepared boron nitride nano-sheets have advantages of large lamellar layer, less layer number and the like, and can be applied to industrial large-scale application.

The invention discloses an in-mould assembly method, which mainly comprises the following steps: arranging first and second female dies inside and outside an injection table; arranging a male die with double die surfaces between the two female dies; closing the three dies, pouring plastic, ensuring saturation pressure and opening the die, then taking the middle male die out and quickly advancing the first and second female dies to form the die closing program of the two female dies, and quickly finishing the assembly of the two plastic members formed in the first and second female dies when opening the dies for the first time in the mould when closing the two female dies so as to obtain an expected plastic product. The in-mould assembly method provided by the invention gets rid of a plurality of processes for manual assembly, simplifies the manufacturing process, solves the technical problem of large factory building space needed by the plurality of processes, greatly reduces the labour cost so as to have the advantages of meeting the market competition and economic benefit, and solves the problems of poor assembly efficiency and low rate of qualified product caused by different capacities of the staff.

Method for drying compressed gas by means of a dryer (7) with pressure vessels (13 and 16), whereby this method comprises the steps of guiding a first part of the gas to a cooler (40) via a regulating valve (43), and of subsequently drying this first part of the gas in the drying pressure vessel (16); and of heating a second part of the gas so as to regenerate the regenerating pressure vessel (13), whereby, when the temperature in the regenerating pressure vessel (13) rises above an upper limit value, the regulating valve (43) will be shut and, when this temperature drops under a lower limit value, the regulating valve (43) will be opened.

The invention discloses a novel method for preparing a core-shell type silicon/carbon composite material through in-situ carbon coating. The method comprises the steps of: performing ball milling on lithium carbonate and silicon powder in a certain ratio for 3-96 hours, and transferring the mixture into a closed reactor; heating the reactor at a temperature rise rate of 0.2-20 DEG C/min to a temperature of 400-800 DEG C, performing heat preservation for 0.5-20 h; and after the reaction is finished, performing cooling to a room temperature, taking out a product in the reactor, sequentially soaking in 1M diluted hydrochloric acid for 3h, soaking in 10% hydrofluoric acid for half an hour and washing with deionized water and alcohol for three times; and performing suction filtration, and performing vacuum drying at a temperature of 80 DEG C to obtain a silicon/carbon composite material. The method provided by the invention is simple in process, low in reaction temperature and strong in operability; according to the novel method for preparing the core-shell type silicon/carbon composite material, the morphology of the obtained product is of a core-shell type structure, the product has the excellent electrochemical performance as a lithium ion battery anode material, and the discharge capacity is close to 1300mAh/g after 50 times of circulation under the current density of 1 Ag-1.

The invention discloses a device and a method for preparing a liquid metal catalyst by plasma, the device comprises a reaction chamber and a sealing cover, the reaction chamber and the sealing cover form an accommodating cavity; an aeration head, an aeration pipe and a first electrode are arranged in the accommodating cavity, an insulating sleeve is arranged in the aeration pipe, and a second electrode is arranged in the insulating sleeve; an aeration head is arranged at one end of the aeration pipe, a sealing plug is arranged at the other end of the aeration pipe, and the second electrode is sealed with the aeration pipe through the sealing plug. According to the invention, uniform and high-density plasmas can be formed, a large number of active particles are generated in a gas phase and introduced into a liquid phase to form activated water, and the catalytic forming rate of the liquid metal catalyst can be effectively increased and the preparation efficiency of the liquid metal catalyst can be improved by regulating and controlling the types of active substances and the reaction temperature.

The invention relates to a plant-derived flavonoid antibacterial compound and application thereof. The invention provides 37 flavonoid compounds capable of resisting gram-positive drug-resistant bacteria, and 31 gram-negative drug-resistant bacteria capable of resisting mcr positive in combination with Colistin. The compound does not have hemolytic activity and cytotoxicity, and has better safety;besides, infection or pollution caused by MDR gram-positive bacteria can be effectively inhibited, including wound skin infection caused by MRSA, intestinal colonization of VRE is eliminated, and good anti-decay and disinfection effects are achieved. In addition, the flavonoid compound AMG or IBC is derived from plants, is small in molecular weight and simple in structure, and can be obtained andprepared on a large scale.

A microbial culture having an enhanced glutaminase activity prepared by releasing the catabolite repression of a microorganism under incubation which is capable of producing glutaminase and, if required, supplying a nitrogen source at the medium stage of the incubation. A protein is treated with the microbial culture thus obtained in the presence of a protease under a salt-free condition or in the presence of not more than 3% (weight/volume) of sodium chloride to thereby give a protein hydrolysat having a potent flavoring effect and being useful as a seasoning.

The invention provides a kind of reconstructive E.coli CGMCC1667 and reconstructive aminoglycoside enzyme of double functional modification induced by reconstructive E.coli CGMCC1667, and a kind of metabolism model of reconstructive aminoglycoside enzyme of double functional modification, which is disclosed as the application in selecting antibiotic of reconstructive aminoglycoside enzyme of double functional modification and inhibitor of reconstructive aminoglycoside enzyme of double functional modification. This model can research acylation and phosphorylation of antibiotic by reconstructive enzyme of double functional modification. It is charateristic in that it is convenient, quick, accurate and has high degree of automatization, and it can distinct original type and catabolite. It can not only selecting antibiotic of reconstructive aminoglycoside enzyme of double functional modification and inhibitor of reconstructive aminoglycoside enzyme of double functional modification, and also evaluate the stability of new medicine to enzyme of double functional modification.

The invention discloses a technique for preparing a Sudan grass protoplast by using a vacuum enzymolysis method, belonging to the field of biotechnology. The technique comprises the steps of: chopping spires and stems of the Sudan grass in a certain size after the Sudan grass seeds sprout; and performing enzymolysis on cell walls of both the spires and the stems by utilizing the vacuum enzymolysis method so as to separate out a plenty of Sudan grass protoplasts. By utilizing the method, a plenty of Sudan grass protoplasts with complete cells can be prepared conveniently and rapidly.