366results about How to "Simple preparation technique" patented technology

A stereo class-D audio system includes a first die including four monolithically integrated NMOS high-side devices and a second a second die including four monolithically integrated PMOS low-side devices. The audio system also includes a set of electrical contacts for connecting the high and low-side devices to components within the a stereo class-D audio system, the set of electrical contacts including at least one supply contact for connecting the drains of the high-side devices to a supply voltage (V_cc) and at least one ground contact for connecting the drains of the low-side devices to ground, the electrical contacts also including respective contacts for each source of the high and low-side devices allowing the source of each high-side device to be connected to the source of a respective low-side device to form two H-bridge circuits.

An aerodynamic airflow control device is preferably mounted either in a rigid or slidable manner to an underside of a truck trailer just forward of the trailer tires and axles to better manage airflow around the trailer tire and axle assembly. In operation, the device preferably collects and routs impinging air to exit between the trailer tires and under the trailer axles to reduce road spray while keeping tires and brakes running cooler and while further decreasing parasitic drag of the truck and trailer unit as it moves along the highway.

A method of actuating a valve, comprises operatively coupling the valve with an electroosmotic pump; flowing a fluid through the electroosmotic pump; and generating a fluidic pressure of at least 0.75 PSI to actuate the valve, wherein the electroosmotic pump comprises one or more thin, porous, positive electroosmotic membranes and one or more thin porous, negative electroosmotic membranes; a plurality of electrodes comprising cathodes and anodes, and a power source; wherein each of the positive and negative electroosmotic membranes are disposed alternatively and wherein at least one of the cathodes is disposed on one side of one of the membranes and at least one of the anodes is disposed on the other side of the membrane and wherein at least one of the cathodes or anodes is disposed between a positive and a negative electroosmotic membrane.

The invention discloses a green synthetic method suitable for preparing a controllable superfine metal oxide/carbon nano tube composite material, relating to the field of nano science and catalytic composite materials. An active phase comprises multifunctional oxides of TiO2, ZrO2 and Fe2O3. The synthetic method comprises the following steps of: pretreating corresponding metal salts of TiOCl2, ZrOCl2 and Fe(NO3)3 in a DMF(Dimethyl Formamide) solution to form a precursor; adding phenol as a surfactant in the precursor; adding a multi-wall carbon nano tube treated with a proper amount of acid; carrying out slow hydrolytic polymerization and depositing under the condition of heating to form a TiO2/CNT (Carbon Nano Tube), ZrO2/CNT and Fe2O3/CNT / composite material. The method has general applicability to realizing that multifunctional nano metal oxides which are convenient to obtain through hydrolysis are compounded with carbon tubes with hydrophobe surfaces; and the obtained nano composite material is possibly applied to various catalytic fields.

A bioactive Ti or Ti alloy used as the hard tissue implantation material is prepared from Ti or Ti alloy through electrochemical treating to generate an oxidized film on surface, chemical treating with alkali solution to generate a porous reticular layer of titanate gel, heat treating to make said gel layer become crystalline, and immersing in human bionic liquid to generate phoshpotite layer. Its advantages are high hardness and binding strength to basic body, and low cost.

An electroosmotic pump comprises a plurality of membranes comprising one or more positive electroosmotic membranes and one or more negative electroosmotic membranes, a plurality of electrodes comprising cathodes and anodes, and a power source. Each of the positive electroosmotic membranes and negative electroosmotic membranes are disposed alternatively and wherein at least one of the cathodes is disposed on one side of one of the membranes and at least one of the anodes is disposed on other side of the membrane. At least one of the cathodes or anodes is disposed between a positive electroosmotic membrane and negative electroosmotic membrane.

The present invention relates to a method for preparing nano noble metal hydrogenation catalyst by using chemical displacement process and its application. It is characterized by that it utilizes metal elementary substance M and salt of noble metal N and makes them undergo the process of displacement reaction to produce elementary substance N, in which the N represents Ru, Rh, Pd, Pt and Ir or their mixture, M represents Zn, Al, Fe, Co and Ni. When the M is terrifically excess, N/M type metal loaded nano noble metal can be produced; and When the N and M are approximate to stoichiometry, the highly-dispersed nano N colloid can be formed, after the stabilizing agent is added, the load type N/S can be prepared, in which S represents C, Al2O3, SiO2, MgO, ZrO2 and CeO2. Said catalyst can be used for hydrogenation reaction of various compounds.

An optical fiber based polymer core sensor includes an optical fiber having a core and an end having a cured polymer core affixed to the core of the optical fiber. The cured polymer core extends outward from the end of the optical fiber and has a diameter approximately equal to the core of the optical fiber. Note the cured polymer core can be substantially cylindrical, tapered or geometrically shaped. The optical fiber based polymer core sensor can be used to measure a temperature, measure a strain, measure a distance, measure a refractive index, detect or measure an analyte, detect a toxin, detect a biological agent, monitor a chemical process, or a combination thereof

A mask plate comprises base plate, top surface or bottom surface and metal film layer pattern of chromium and gold or copper or silver or aluminium in the same pattern at both of top and bottom surfaces. It works as that a light is used to shine metal mask plate with micro-fine pattern structure to generate plasma wave in short wavelength for carrying out photoetching with normal wavelength light or long wavelength light passing through metal mask based on propagation characteristic of nanopattern hole and seam.

The invention relates to multifunctional compound microecological preparation nano-selenium-recombination expression VIP (vasoactive intestinal peptide)-lactococcus lactis and a preparation method. Toxic sodium selenite can be converted into non-toxic red simple-substance nano-selenium, and synthesized nano-selenium is enriched in lactococcus lactis NZ9000 in cells. The invention also discloses amethod for preparing a multifunctional compound microecological preparation SENPs-rVIP-L.lactis NZ9000 based on lactococcus lactis NZ9000. The problems that existing selenium supplementing additives have high toxicity action and low bioavailability and easily cause environment pollution, existing production technical procedures are complicated, the cycle is long and the production cost is high andthe problems about remaining of antibiotics, drug resistance and the like are solved.

The invention discloses a micro spherical hollow structure nickel-based hydrogenation catalyst as well as a preparation method thereof in the technical field of catalyst preparation. The method comprises the following steps: controlling the morphology of an aluminum raw material serving as a mold plate which is consumed gradually along with the reaction, inducing hydrotalcite assembly to obtain a micro spherical hollow hydrotalcite assembly body, and carrying out in-situ reduction to obtain the micro spherical hollow nickel-based catalyst. The catalyst material obtained by preparation has high specific surface area, and the internal empty cavity structure and the abundant open-framework structures have great actual application value. The catalyst has relatively high hydrogenation activity and selectivity when being used for catalyzing dimethyl terephthalate (DMT) benzene ring hydrogenation in the reaction for preparing dimethyl 1, 4-cyclohexanedicarboxylate.

The invention provides a glomerulus-targeted protein nanoparticle pharmaceutical composition and an application thereof. The protein nanoparticle pharmaceutical composition is mainly prepared from a protein ingredient, a pharmacological active substance and a stabilizer, and the grain size of the protein nanoparticle pharmaceutical composition ranges from 10nm to 170nm. With the application of the pharmaceutical composition, passive targeted drug delivery of glomerular mesangial cells is achieved, and the aggregation concentration of a drug in a glomerulus is obviously improved or the aggregation duration of the drug in the glomerulus is prolonged, so that the curative effect of the drug is remarkably improved, and meanwhile, the toxic and side effects of the drug on a non-targeted part are greatly reduced.

The invention discloses dry-mixed mortar prepared from hot furnace slag and a preparation method of the dry-mixed mortar. The dry-mixed mortar comprises the following components in parts by mass: 200-750 parts of an inorganic cementitious material, 280-900 parts of medium sand, 500-1220 parts of hot furnace slag sand and 2-7.5 parts of an additive, wherein the inorganic cementitious material comprises the following components in percentage by mass: 50-65% of cement, 25-30% of hot furnace slag power, 5-10% of blast furnace slag fine powder and 5-10% of limestone fine powder; the additive is cellulose; the hot furnace slag is nickel ore smelting slag; after the hot furnace slag is sieved, the hot furnace slag with the particle sizes of 0.6-2.36 mm is the hot furnace slag sand. All the components are measured according to the formula, and then mixed and stirred to obtain the dry-mixed mortar. According to the preparation method, the process is simple; dry-mixed mortar with the grade of M5-M30 can be prepared; the rate of multipurpose utilization of the hot furnace slag can be remarkably increased; environmental pollution is reduced; social and economic benefits are obvious.

The invention relates to a special forming mold for a T-shaped precast beam plate, comprising a base, wherein the base is provided with a T-shaped mold frame for manufacturing the T-shaped precast beam plate, the T-shaped mold frame consists of two groups of side templates and two groups of end templates, the two groups of side templates are respectively symmetrically arranged at the left side and the right side at the upper end of the base in parallel, the two groups of end templates are respectively connected with and arranged at the front end and the back end of the two groups of side templates, the base is provided with a plurality of guide rails which are convenient for the two groups of side templates and the two groups of end templates to slip outwards, the lower end of each side template and the lower end of each end template are respectively provided with a guide groove which is matched and connected with each guide rail, a plurality of electric push rods are arranged at the outer sides of the side templates and the outer sides of the end templates on the base, the screw rod end of each electric push rod at the outer side of each side template is connected with each side template, the screw rod end of each electric push rod at the outer side of each end template is connected with each end template, and the stand end of each electric push rod is fixedly connected with the base.