141 results about "Template synthesis" patented technology

The present invention relates to a method and a device for verifying identity of an individual by employing biometric data derived from a physical feature of the individual. A basic idea of the invention is that, rather than determining peak locations in cyclic signals such as ECG or PPG signals when using these signals as a representation of biometric data for verifying identity of an individual, shape or morphology of the signals is considered.

The present invention relates to methods for fabricating a laterally-limited two-dimensional structure through template synthesis. The methods of the invention are useful in forming homogenous and heterogeneous layered materials. The invention also provides structures and devices formed by the method of the present invention and uses thereof.

The invention discloses a preparation method of a SAPO-18-carried Cu-Fe catalyst for ammonia-selective catalytic elimination of NOx. The SAPO-18-carried Cu-Fe catalyst is used for selective catalytic elimination of nitric oxides. The preparation method is characterized in that SAPO-18 foraminate molecular sieve carriers having high specific surface areas of 400 to 550m<2>/g are prepared by a soft template synthesis method; and a FeCl3-CuCl2 mixed solution and the SAPO-18 foraminate molecular sieve carriers are prepared into the SAPO-18-carried Cu-Fe catalyst by an ion exchange method. In a wide temperature range of 150 to 550 DEG C, the SAPO-18-carried Cu-Fe catalyst has high catalytic elimination effects on pollutants having a high airspeed of 120000 to 360000mL.(g.h)<-1>, a high O2 concentration of 10 to 20vl.%, high H2O content of 5 to 10wt% and a low NO concentration of 300 to 1000ppm, and has high stability. After adding a hydrocarbon (300 to 1000ppm of propylene) into a reaction system, the SAPO-18-carried Cu-Fe catalyst has high carbon deposition resistance and high hydrothermal stability.

The present invention provides novel compositions and methods for suppressing the expression of a targeted gene using RNA-DNA hybrid constructs. The invention further provides novel methods and compositions for generating or producing RNA-DNA hybrids, whose quantity is high enough to be used for the invention's gene silencing transfection and possibly in therapeutics applications. This improved RNA-polymerase chain reaction method utilizes thermocycling steps of promoter-linked DNA or RNA template synthesis, in vitro transcription and then reverse transcription to bring up the amount of RNA-DNA hybrids up to two thousand folds within one round of the above procedure for specific gene silencing.

The invention discloses a method for preparing a zinc-doped iron trioxide composite structure gas-sensitive element and application thereof and belongs to the field of preparation of nanometer functional materials. The gas-sensitive element is a nanocomposite material synthesized by taking MOFs as a template. The preparation method specifically comprises the following steps: preparing a Zn-doped MIL-88B nano spindle by adopting a one-step solvothermal method; performing centrifugal drying on the obtained product, calcining in an air atmosphere, and finally obtaining Zn-doped alpha-Fe2O3 nanocomposite material powder; further adding terpilenol into the obtained nano powder, uniformly grinding, smearing on a ceramic tube, sintering in a muffle furnace, thereby obtaining the gas-sensitive element. The gas-sensitive element has the gas-sensitive characteristics of low concentration detection, fast response, high stability and high selectivity and can be used for preparing semiconductor gas-sensitive sensors.

The invention involves preparation method of three-dimensional network hierarchy photocatalysis materials which crystal phase can be controlled. The method bases on biological template synthesis technology, uses bird eggshell membrane as biological template material, dips the eggshell membrane into titanates prodromal liquid to handling the dip optimization after separating, washing and pretreating the eggshell membrane, then oxygenizes and incandesces it to forming titania nanometer crystal under the action of biological template in original position, then prepares nanometer titania with excellent performance and three-dimensional network hierarchy as photocatalysis material. The prepared photocatalysis material consists of mixing-phase titania crystal grain which grain size is below 20nm, the component percentage of anatase phase and rutile phase can be controlled by adjusting the pH of steeping liquor. The process of the invention is simple, cost is low and the performance of prepared photocatalysis material is stable; it can be used for gas sensor, pressure-active element, nonlinear optical material, solar battery and environmental purification material, it also has good prospect in the electrical, electronic, industrial and civil fields.

The present invention relates to a bioreactor for RNA in vitro transcription, a method for RNA in vitro transcription, a module for transcribing DNA into RNA and an automated apparatus for RNA manufacturing. Further, the use of a bioreactor for RNA in vitro transcription as described herein is part of the present invention. The present invention relates to an RNA in vitro transcription reactor designed to be operable in an automated manner under GMP-compliant conditions. In particular, said RNA in vitro transcription reactor allows repetitive use of DNA template for various RNA in vitro transcription reactions. Further, the invention relates to an apparatus for RNA manufacturing comprising (a) a module for template DNA synthesis, (b) a module for transcribing DNA into RNA comprising said RNA in vitro transcription reactor, and, optionally, (c) a module for RNA formulation.

A preparation method of hollow metal microspheres relates to a composite material. The invention provides a preparation method of hollow metal microspheres which is quick, environment-friendly and simple in subsequent treatment process. The preparation method comprises the steps of preparing gold nanoparticles and titanium dioxide successively, and then functionalizing the surface of titanium dioxide, and then preparing Au/TiO2, and finally preparing the hollow metal microspheres. Titanium dioxide microspheres are used as templates, and dimension-controllable PtM metal hollow microspheres are prepared by means of the pH sensitivity of the titanium dioxide. The size of the PtM metal hollow microspheres can be controlled by regulating the size of the template titanium dioxide, and simultaneously, the thickness of the PtM metal hollow microspheres can be changed by changing the concentration of the metal precursor. Multi-layer PtM hollow microspheres are synthesized with the titanium dioxide as the templates; and therefore, the preparation method of the hollow microspheres is expanded. Besides, the technical conditions are mild and easy to control, the reaction time is short, the templates are easy to remove without use of a high temperature or a strong acid and a strong base, and the like, and simultaneously, the subsequent treatment process is simple.

The invention provides a method for preparing porous carbon from ethylene tar, and belongs to the field of advanced processing of petrochemical byproducts. The method comprises the following steps: preprocessing and pre-oxidizing ethylene tar, and uniformly dispersing the pre-oxidized ethylene tar in an alkali solution with a certain concentration; dropwise adding a magnesium precursor to the above obtained colloid, standing the obtained mixture overnight, carrying out centrifuge and drying to obtain a carbon precursor and template agent coprecipitate, and carrying out high-temperature charring and pickling in inert atmosphere to obtain the target product. The in-situ template synthesis method provided by the invention realizes homogeneous mixing of the precursor and the template and regeneration of the pickled template and also realizes the material circulation of the whole technology, and the prepared porous carbon has narrow aperture distribution, has a specific surface area reaching 1620 m<2>/g, has a specific capacitance reaching 260 F/g, can be used as an energy storage material and an electrode material, and realizes high-added value utilization of the ethylene tar.

The invention discloses a technology for enhancing fluorescence and improving anti-oxidant activity of DNA-Ag NCs synthesized by the DNA template method. The fluorescence intensity of the DNA-Ag NCs synthesized by taking a cytosine-rich oligonucleotide as a template is remarkably enhanced in the presence of Ag nano-particles with stable sodium citrate, and the anti-oxidant activity of the DNA-Ag NCs in saturated dissolved oxygen is also improved obviously. The technology provided by the invention has the advantages of simple operation, high speed and efficiency, low cost and the like.

The invention discloses a rare earth phthalocyanine sandwich layered structured compound and a preparation method thereof. According to the method, a "solid phase" or a "liquid phase" template synthesis method is adopted to synthesize the compound in one step, and then through a purification technology with a combination of specifically designed recrystallization, washing and thermal vacuum treatment, the high-purity rare earth phthalocyanine sandwich layered structured compound is obtained, wherein the layer spacing of the compound is 2-4angstroms, and effective reversible intercalation and deintercalation of lithium ions can be realized. The synthesis technology disclosed in the invention has high yield, less side products, high target compound purity, simple operation process and low cost and is suitable for industrial large-scale production; the capacity of the negative electrode material is obviously higher than the theoretical capacity (372 mAh/g) of the conventional graphite negative electrode material; in addition, the negative electrode material has very high initial coulombic efficiency and cycle performance; and therefore, the lithium ion battery assembled by taking therare earth phthalocyanine sandwich layered structured compound as the negative electrode material has excellent electrochemical performance and practical value.