75results about How to "Increasing concentration gradient" patented technology

A super-porous aqueo-gel of an interpenetrating network polymer used for the orally applying system of protein polypeptide to suppress proteinase and break the close linking between epithelial cells contains two polymers: a cross-linked polymer and a cross-linked polyose polymer. Its preparing process includes such steps as mixing at least one unsaturated enylmonomer, at least one polyenyl cross-linking agent, a linear polyose polymer and a foaming agent to generate the super-porous aqueo-gel of semi-interpenetrating network polymer, and cross-linking with linear polyose.

The invention provides a microemulsion preparation taking rosin-based vegetable oil as a solvent and a preparation method thereof, and relates to a pesticide preparation. The microemulsion preparation consists of the following raw materials in percentage by mass: 0.5 to 30 percent of pesticide active ingredients, 55 to 20 percent of emulsifier, 0 to 8 percent of cosolvent, 0.1 to 0.3 percent of defoamer, 1 to 30 percent of rosin-based vegetable oil, and the balance of water. The preparation method comprises the following steps of: adding the pesticide active ingredients, the rosin-based vegetable oil, the cosolvent, emulsifier and the defoamer into a reaction kettle, performing cutting and uniform dispersion at 2,000 to 5,000 rpm/min, and adding the balance of water into the mixture for high-speed cutting to obtain the microemulsion preparation taking the rosin-based vegetable oil as the solvent.

The invention discloses a method for encapsulated osteoblasts to support and regulate the in-vitro amplification of cord blood hematopoieticstem/progenitorcells (He) in the hypoxia condition, belonging to the fields of biotechnology and tissue TSPCS engineering. The method is characterized in that the human osteoblasts are embedded by gelatin-alginate-chitosan (GAC) microcapsule as matrix feeder cells and co-cultured with the cord blood HSPCs in the 5% hypoxia environment to obtain the HSPCs. The invention adopts GAC microcapsule to separate the human osteoblasts from the cord blood HSPCs to avoid the cell contamination and immunological rejection. Furthermore, the pore passages of the microcapsule are capable of causing hemopoietic growth factors secreted by the osteoblasts in the microcapsule to expand to the habitat of the HSPCs and play a role of stimulating the amplification of the hematopoietic stem/progenitor cells. Moreover, the material of the microcapsule has the slow release function to the expansion of the growth factors to increase the concentration gradient of the growth factors on the surface of the microcapsule, which is helpful for the long-term function of the growth factor. In addition, the microencapsulated osteoblasts form the 3D environment, which not only causes the culture system to contain more osteoblasts, but also causes the culture system to have bigger HSPCs-OBs action area compared with the co-culture pattern of the osteoblasts cultured by adherence. Besides, in the 5% hypoxia environment, the co-culture system is capable of better simulating the hematopoietic microenvironment iche of human bone marrow the osteoblasts have significant effects on the characteristic maintenance and number amplification of stem cells of the HSPCs.

The invention relates to a control system of the carbon intensity distribution of a low-pressure carburized layer and a control method thereof, belonging to the technical field of metal heat treatment. The control system comprises a low-pressure carburizing furnace, a controller, a pressure sensor, a thermoelectric couple, a nitrogen regulating valve, a nitrogen input pipe, a carburizing gas regulating valve, a carburizing gas input pipe, a vacuum system and a gas suction pipe. The invention simulates automatic optimized low-pressure pulse process parameters by using carburized layer concentration distribution values and realizes the control functions; the carburizing gas regulating valve executes on/off action according to an order of the controller to control carburizing section time and diffusing section time, therefore the accurate control of the intensity distribution of the carburized layer is realized; and in addition, the invention can keep high carburizing speed and prevent the tolerance of surface carbides, accurately controls the surface carbon intensity and the depth and the intensity distribution of the carburized layer, reduces the accumulated carbon black inside the low-pressure carburizing furnace, is free from depending on a gas component sensor and has the advantages of configuration simplification, easy implementation, high reliability and easy maintenance.

In a fuel cell 1 including a membrane electrode assembly 2 which includes a reinforcing-membrane-type electrolyte membrane 10A, a dry-up on the anode side is suppressed by actively forming a water content gradient in the electrolyte membrane to enhance water back-diffusion effect from the cathode side to the anode side. For that purpose, two sheets of expanded porous membranes 12a and 12b having different porosities are buried, as reinforcing membranes, in electrolyte resin 11 to obtain the reinforcing-membrane-type electrolyte membrane 10A. The reinforcing-membrane-type electrolyte membrane 10A is used to form the membrane electrode assembly 2, which is sandwiched by separators 20 and 30 such that the side of a reinforcing membrane 12b with a larger porosity becomes the cathode side, thus obtaining the fuel cell 1. When one sheet of the reinforcing membrane is buried, the reinforcing membrane is offset to the anode side to be buried in the electrolyte resin.

The invention discloses a fuel cell system capable of relieving cell water logging. The system comprises an electric pile for producing electricity by using an electrochemical ration between oxygen-containing gas and hydrogen-containing gas, an air supply device for supplying the humidified oxygen-containing gas for the electric pile, a hydrogen supply device for supplying the hydrogen-containing gas for the electric pile and a cooling device for carrying out heat exchange between heat generated in the power generation process and guided cooling water on the electric pile, wherein the cooling device comprises a cooling water tank, a cooling water pump and a cooling flow passage arranged in the electric pile. The system also comprises a condensing device, for condensing air tail gas, which is arranged at an air outlet of the electric pile; a gas outlet of the condensing device is communicated with the outside; and a liquid water outlet of the condensing device is connected with the cooling water tank. According to the fuel cell system, the cell water logging can be relieved effectively, and the power of the electric pile is improved.

The invention discloses a flash memory and a manufacturing method thereof, belonging to the technology field of a semiconductor memory. The flash memory includes a buried oxide layer on which a source terminal, a channel and a drain terminal are arranged. The channel locates between the source terminal and the drain terminal. A tunnel oxide layer, a polysilicon floating gate, a barrier oxide layer and a polysilicon controlling gate are arranged on the channel in order. A thin silicon nitride layer is arranged between the source terminal and the channel. The manufacturing method comprises the following steps of: (1) providing an SOI silicon substrate with shallow trench isolation and forming an active area; (2) growing the tunnel oxide layer and a first polysilicon layer on the silicon substrate in order and preparing the polysilicon floating gate, and growing the barrier oxide layer and a second polysilicon layer and preparing the polysilicon controlling gate; (3) etching and forming a gate stacking structure; (4) preparing the drain terminal on one side of the gate stacking structure, etching a thin silicon film on the other side of the gate stacking structure, growing the thin silicon nitride layer, then backfilling a material of silicon, and preparing the source terminal. The flash memory and the method have the advantages of high programming efficiency, low power consumption, and capability of inhibiting a source-drain punch-through effect effectively.

A method for preparing nimbin through supersonic wave extraction which comprises the steps of, disintegrating the nim seeds after oil extraction, charging it into extraction solvent, carrying out leaching process by supersonic wave. The method for preparing nimbin by the invention realizes low cost, and increased nimbin extraction efficiency.

The present invention relates to the technology of lithium sulfur batteries, and aims to provide a method for preparing a composite separator for a lithium sulfur battery. The method comprises the following steps: a polyamide acid solution is obtained by reaction of diamine and dianhydride, which is used as a spinning solution for spinning film formation; polyimide spinning base film is obtained after thermal imidization treatment; the polyamic acid solution is mixed with small nitrogen-containing molecules and graphene oxide and then subjected to spinning film formation, and after thermal imidization and carbonization treatment, self-supporting reduced graphene oxide/nitrogen-doped carbon nanofiber is obtained; the polyimide spinning base film and the reduced graphene oxide/nitrogen-dopedcarbon nanofiber are taken; and the two layers are laminated and sliced to obtain the composite separator for assembling the lithium sulfur battery. The separator of the invention has good heat resistance and flame resistance, can greatly improve the safety performance of the lithium sulfur battery, reduces the internal resistance of the battery and enhances the electrochemical performance of thebattery. High charge and discharge specific capacity, high cyclicity and safety of the lithium sulfur battery are realized.

The invention discloses a miniature box-type drag chain scraper flipover leacher. The miniature box-type drag chain scraper flipover leacher comprises a box-type leacher shell, wherein a plurality of driving chain wheels are arranged in the box-type leacher shell, and are sleeved by box chains; spaced push plates are fixedly arranged on the outer side of the box chains; material storage tanks, manholes and discharge holes are respectively formed in the upper end and the lower end of the box-type leacher; feeding augers are arranged below the material storage tanks; a plurality of push box lattices as leaching units are arranged in the box-type leacher; circulating mixed oil forms a soaking pond above each push box lattice; a plurality of oil buckets are formed in the bottom surface of the box-type leacher shell; and circulating pumps are arranged at oil inlets of the oil buckets. The miniature box-type drag chain scraper flipover leacher adopts a dual-layer multi-nozzle spray-type low material level, is suitable for a preform which is large in particle size and high in moisture content (5%-8%) and of which the normal moisture is not greater than 8%-10%; the equipment operation is controllable; the production operation is stable; blanking and meal discharging are stable; the residual meal discharge oil is not greater than 1.0%; the leaching time is controlled at about 90-120 minutes in general according to the oil variety; and the optimal effect of continuous production of the special oil is achieved.

The invention relates to the technical field of wastewater treatment and discloses a treatment system of high-concentration ammonia nitrogen organic wastewater. The system comprises a feed hopper (1), a homogenating tank (2), a methane tank (3), an upstream type anaerobic sludge bed reactor (4), a biological contact oxidation pond (5), a secondary sedimentation tank (11), a micro electrolytic reactor (10), a circular aeration biological filter (6) and an ozone disinfection tank (7), and the methane tank is connected with a sludge thickener (8). The invention further discloses a treatment method of the high-concentration ammonia nitrogen organic wastewater. The treatment method comprises anaerobic digestion treatment, activated sludge treatment, micro-electrolysis reaction, circular aeration biological filter biochemical treatment and ozone disinfection. The process is simple, the reaction process concentration gradient is large, and sludge is not prone to bulking; the capability to resist impact load is high, and the treatment effect is good; all working procedure time is controlled by adjusting the operation period, and at the same time, denitrification and phosphorus removal effects are remarkable.

The invention provides a selective etching method and a preparation method of a nano needle tip structure. The selective etching method comprises the following steps that a first material layer and asecond material layer are sequentially formed on a substrate, the isotropic etching selection ratio of the first material layer to the second material layer is larger than 10, the first material layercontains doping elements, and the concentration of the doping elements is linearly increased in the thickness direction of the first material layer; and selective isotropic etching is performed on the first material layer, wherein the etching rate of the selective isotropic etching has a positive linear relationship with the concentration of the doping elements, so as to complete the etching of the outer wall of the first material layer. According to the invention, the positive linear relationship between the etching rate in the etching process and the concentration of the doping elements inthe to-be-etched material is utilized, so that sloped sidewalls opposite to the increasing direction of the concentration is obtained; by the adoption of the selective etching method, the nano needletip structure with high sharpness can be obtained, and the size, the shape and the angle of the needle tip structure can be flexibly adjusted.

The invention discloses a method for extracting asiaticoside from asiatic centella comprising the step of using asiatic centella as raw material, and water solution of ethanol or methanol as extraction solvent for extracting asiaticoside from asiatic centella in high efficiency by percolation method for achieving more than 93% extraction ratio for the asiaticoside. The method has high extraction ratio, small consumption of solvent, low production cost, and easy commercial process.

The invention relates to a traditional Chinese medicinal preparation, namely a compound containing Ginseng raw material externally-used liniment for treating hair loss and a preparation method. The compound externally-used liniment for treating hair loss is prepared by taking Ginseng as a main drug, compounding Ginseng with resorcinol, pepper, calcium pantothenate, castor oil and other medicines, and refining through a liquid-pan-extraction technology. The main drug Ginseng-based compound externally-used liniment for treating the hair loss has the effects of nourishing and growing hair, improving local blood circulation, nourishing hair follicles and promoting hair growth, is quick in curative effect, is easy, convenient and safe to use, and is free of any toxic side effect after a long-term use; and through clinical observation, the main drug Ginseng-based compound externally-used liniment for treating the hair loss has a significant effect on alopecia areata and seborrheic alopecia, with an effective rate of 91%.

The invention relates to a loose fiber continuous washing and finishing machine, and belongs to the technical field of loose fiber processing equipment. The equipment comprises a base, an unwinding device, multiple washing devices, multiple rolling devices and a squeezing device are arranged on the base in sequence in the processing direction of loose fiber; the washing devices and the rolling devices are arranged at intervals, washing tanks are filled with washing water, and a pipeline is connected between every two adjacent washing devices. Accordingly, by arranging the washing devices and the rolling devices which are arranged at intervals, a fiber layer is subjected to multiple times of cleaning and squeezing, residual chemical agents in the fiber layer are washed out rapidly conveniently, and cleaning is more sufficient; the adjacent two washing devices are connected through the pipelines, and the last washing device is connected with an external water source so as to supplement the washing water, the water in the external water source flows forwards step by step through the way of overflow, the utilization rate of the water is increased, and water consumption is greatly reduced.

The present invention provides a coenzyme Q10 clear preparation which is added into skin caring articles and a preparation method thereof, and belongs to the technical field of personal caring article preparation. The coenzyme Q10 clear preparation comprises the following components: coenzyme Q10, emulsifier mixture, pH regulator, stabilizer and water. The particle size of microemulsion of the coenzyme Q10 is less than 150nm. The microemulsion solution is yellow clear water solution. Furthermore the coenzyme Q10 clear preparation has the following advantages: low viscosity, better fluidity, and high stability. The coenzyme Q10 clear microemulsion preparation prepared according to the invention overcomes the following defects in coenzyme Q10: low water solubility, low oil solubility, and high difficulty of being added into personal caring article. Simultaneously the preparation performs antioxidation and anti-aging biological activity on the skin. The process for preparing the personalnursing product which comprises the coenzyme Q10 is simplified. A novel dosage form is provided for the application of the coenzyme Q10 on the aspect of personal nursing product.

The present invention discloses a percolation extraction method of raffinose. Utilizing extraction solvent for extraction, the method includes the following processes: degreased cotton seed meal is used as material, methanol aqueous solution or ethanol aqueous solution, the volume percentage concentration of which is 70 percent to 85 percent, is used as the extraction solvent, which is added into a percolation column containing the degreased cotton seed meal under the temperature of 50 DEG C to 70 DEG C, and after the degreased cotton seed meal is sufficiently swelled, the extraction solvent flows through the percolation column in order to collect percolated extract at an outlet. In the percolated extract, the extraction rate of the raffinose is more than 95 percent. The method has the advantages of high extraction rate, little solvent consumption, low production cost, easy industrialized production, and the like.

The invention relates to the technical field of food washing, in particular to ultrasonic wave and dry air combined production line drying equipment. The ultrasonic wave and dry air combined production line drying equipment comprises an elevator and a drying shell; the drying shell is fixedly connected to the right end of the elevator; an anti-dust device is fixedly connected to the internal sideof the top end of the drying shell; a buffering device is fixedly connected to the internal side of the drying shell; a controller is fixedly connected to the right end of the drying shell; a door plate is rotationally connected to the right end of the drying shell through a hinge; a collection box is arranged at the bottom end of the drying shell; and a chain wheel is rotationally connected to the internal side of the drying shell. According to the ultrasonic wave and dry air combined production line drying equipment, by arranging a stainless steel water pipe, an insulation pipe, a condensingdehumidifier, a centrifugal fan, an air energy heat pump and a heating heat exchanger, the labor is saved through continuous conveying, and the labor intensity is reduced; and ultrasonic wave and static electricity are combined with dry air with a heat pump as a heat source, the product is sterilized and uniformly water-evaporated under the double effect of the ultrasonic wave and the static electricity at a lower temperature, and therefore, the drying time is shortened and is 1/4 of the common drying time.

The invention discloses a Damascus copper plating formula and an electroplating process thereof, and belongs to the technical field of chemical copper plating. The Damascus copper plating formula is prepared by adding water into the following raw materials in mass concentration: 8.0 to 15.0 g/L of copper sulfate pentahydrate, 25.0 to 40.0 g/L of disodium ethylene diamine tetraacetate, 9.0 to 15.0 g/L of glyoxylic acid, 55.0 to 65.0 mg/L of Cl-55.0 mg/L, 0.5 to 1.5 mg/L of ABA type bubble-free nonionic polymer surfactant containing polyethylene oxide (EO) and polypropylene oxide (PO), 0.3 to 4 mg/L of sodium dithiodipropane sulfonate (SPS), 0.5 to 1.5 mg/L of polyvinyl alcohol (PEG) PEG-4000 and 0.2 to 0.4 mg/L of Junagreen B (JGB), wherein the pH value is 12 to 13, and the temperature is 65 to 75 DEG C. According to the invention, a world mainstream level copper electroplating blind hole filling formula is obtained, and blind hole filling capability of the electroplating liquid is improved by more than 40%.

The invention relates to a preparation method of skimmin. The method comprises technical steps of: creeping dichondra complete herb is subjected to tissue breaking and extraction 3 times by using acetone; an extraction liquid is subjected to reduced-pressure concentration, such that an extraction paste is obtained; multi-stage countercurrent extraction is carried out by using an ethyl acetate-methanol mixed solvent with a ratio of 10:1; extraction liquids are combined; the solvent is subjected to reduced-pressure recovery; the obtained material is processed by using a polyamide resin column; an obtained elution liquid is concentrated, such that a crude product is obtained; the product is fed into a medium-pressure chromatography column with silica gel of 200-300 meshes; a methanol-dichloromethane mixed solvent system is adopted; elution liquids at target component fragments are collected; the elution liquid is filtered and concentrated, and is subjected to low-temperature drying, such that skimmin is obtained. The skimmin preparation method provided by the invention has the advantages of high product purity and suitability for industrialized enlargement.