237results about How to "Long stable time" patented technology

One of the critical design parameters occurs when a digital signal is converted into an analog signal. As the supply voltage drops to less than 2 times of threshold voltage to reduce leakage and save power, generating a relative large swing with a resistor-ladder DAC becomes more difficult. For a 5 bit DAC, 32 sub-arrays are used to select the appropriate voltage from the series coupled resistor network. Each sub-array uses p-channel transistors where the sub-array extracting the lowest voltage 700 mV only has a 100 mV of gate to source voltage. To compensate for the reduced gate to source voltage, the sub-arrays are partitioned into four groups. In each group, the p-channel width is increased from 2 um to 5 um, as the tap voltage drops from 1.2 V to 0.7 V. This allows the p-channel transistor with a small gate to source voltage to have a larger width thereby improving performance.

The invention relates to an enzymatic method for the enantioselective reduction of organic keto compounds to the corresponding chiral hydroxy compounds, an alcohol dehydrogenase from Lactobacillus minor and a method for the enantioselective production of (S)-hydroxy compounds from a racemate.

The invention belongs to the technical field of building materials, and specifically relates to a compound foaming agent for a foam concrete and the preparation method of the compound foaming agent. The compound foaming agent is composed of a surfactant, a protein foaming agent, a foam stabilizing agent, a coagulation accelerator and a water reducing agent. The compound foaming agent provided by the invention is doped with few protein foaming agent and foam stabilizing agent in a surfactant solution to remarkably improve the foaming capability and the foam stabilizing time of the surfactant solution and create favorable conditions for preparing the foam concrete at a low-density grade (not more than 500 Kg/m<3>). In addition, the coagulation accelerator is doped to accelerate the condensation of cement slurry and effectively prevent collapsing; the water reducing agent is doped to improve the working property of a freshly mixed concrete, and reduce the water dosage and improve the strength of the foam concrete at the same time. The product provided by the invention has various functions, and is not limited to only prepare the foam; at the same time, the product provided by the invention has the actions of accelerating coagulation and reducing water, and the product provided by the invention is suitable for preparing the low-density foam concrete.

The invention discloses a liquid thickening agent system including an organic solvent, a plant gum thickener, an organic thickener, an emulsifier and water. According to the thickening agent system disclosed by the invention, the thickening agent system is easy to prepare and has a certain salt resistance; the thickening agent system is fast to swell when used for being mixed with water to prepare a fracturing fluid, the requirement on preparing water is low, and even if sea water (containing salt) is used, the swelling effect of the thickening agent is also not affected.

The invention discloses a natural tea saponin foaming agent, which is characterized by comprising the following components in percentage by mass: 50-70% of tea saponin, 0.01-2% of a preservative, 1-20% of a surfactant, 5-20% of a foam stabilizer, and the balance of water. The foaming agent is non-perishable, and stable and reliable in foaming performance, and has good economic and social benefits.

The invention discloses a gradient wheat wetting process, and belongs to the technical field of processing of wheat powder. Ultrasound, microwaves, refrigeration and functional wheat wetting solution are combined to perform gradient wheat wetting for wheat grains by three times, so that the separation of bran from wheat germs is improved, the evacuating degree and the permeation capacity between such structures as wheat grain epidermises, seed coats, germs and endosperm, and macromolecular nutrient substances are improved, the water permeation speed is accelerated, the total wheat wetting process time is shortened to 6-12 h, the flour yield is 78.5-79.5%, the oxidation resistance and the nutrient value of flour are improved, the appearance quality, the physicochemical quality and the food safety of wheat flour are improved, the consumption of such processes as subsequent flour milling is reduced, the production cost is reduced, and a new road is sought for the wheat wetting process.

The invention discloses a sulfide solid electrolyte material with high stability to lithium, a preparation method thereof. A chemical composition is 7Li2S. XP2S5. YMmOn, x is greater than 0, y is greater than 0, m is greater than 0, n is greater than 0, and M is a metal element. The preparation method comprises the following steps: mixing and ball-milling Li2S, P2S5 and MmOn to obtain an initial solid electrolyte material; and putting the obtained initial solid electrolyte material into a quartz test tube, sealing, carrying out heat treatment, and grinding into powder in an inert gas atmosphere to obtain the sulfide solid electrolyte material with high stability to lithium. The electrolyte also has the advantages of high air stability, good stability to lithium metal, wide electrochemicalwindow and the like, and the all-solid-state lithium battery assembled by the solid electrolyte material has the characteristics of high charge-discharge specific capacity, high safety, excellent cycle stability and the like.

The invention particularly relates to micro-emulsion biological diesel oil and a process for preparation thereof. The technical proposal is that the component and content of the micro-emulsion biological diesel oil comprise biological diesel oil 50-70wt%, compound emulsifier 1-10wt%, carbinol 10-30wt%, cosolvent 1-5wt%, water 5-15wt% and ethanolamine 0.1-1wt%. The process for preparing the micro-emulsion biological diesel oil comprises the following specific steps: adding compound emulsifier in biological diesel oil according to the content of the above each component, adding mixed solution of carbinol, water and cosolvent after completely dissolving through stirring, stirring 20-60min, getting ethanolamine, and adjusting to be transparent. The process for preparation of the invention has the advantages of simple technique, low production cost and environmental friendly. The micro-emulsion biological diesel oil which is prepared has the advantages of transparency, nondiscolouring, long stabilization time and excellent oil saving property, which is not layered in long term.

The invention discloses a multifunctional medical detector which comprises a sample adding mechanism, an optical detection mechanism, a reaction bin, a driving mechanism, an electrode tip and a detection result processing module, wherein the driving mechanism is provided with a driving output shaft, and the driving output shaft is located in the middle of the reaction bin and used for driving a reagent plate in the reaction bin to rotate; the optical detection mechanism is located below the reaction bin, sequentially projecting light rays to at least one dry reagent pieces, used for biochemical detection, of the reagent plate along with rotation of the reagent plate, and receiving the light rays reflected by the at least one dry reagent piece to obtain at least one reflection response voltage value for biochemical detection; the electrode tip is located at the upper part of the reaction bin, provided with at least two telescopic electrode contacts, used for sequentially contacting the electrode on the reagent plate through the electrode contacts along with rotation of the reagent plate to read biochemical detection and/or blood routine examination voltage detection values of samples. The invention further discloses a multifunctional medical detection system.

The invention discloses a method for preparing a nanoscale pesticide preparation by means of silicon dioxide aerogel, belongs to the technical field of pesticides, and particularly relates to the application of silicon dioxide aerogel serving as a novel carrier of a pesticide processing aid. According to the technical scheme, when the silicon dioxide aerogel is used for nanocrystallized preparation processing of a slightly soluble technical material as a carrier, the technical material is dissolved in a solvent or broken, the silicon dioxide aerogel is loaded with liquid containing the solvent through adsorption or mixed with the broken technical material so as to form a nanoparticle drug carrier system with the diameter smaller than 100 nm, water is added to the nanoparticle drug carrier system, stirring or emulsification is conducted for homogenous dispersion, the solvent and water are removed through drying, and then a nanoscale pesticide is obtained. The method has the advantages that environment friendliness is realized, and the gap in the carrier material for nanoscale pesticides at home and abroad is filled.

The invention relates to a filling system for filling valve bags, and to a method for operating a filling system, which comprises at least one rotating packing machine having a drive for rotating the packing machine, and a plurality of filling nozzles, which are distributed across the periphery of the rotating packing machine. The filling nozzles are provided for receiving the valve bags and can be fixed to the filling nozzles at an opening, and they may be filled with a pourable material through the filling nozzles. The valve bags are placed onto the filling nozzles at a defined insertion position and are automatically released at a defined release position. The invention provides a controller in order to control the filling process. A pressure sensor (10) is associated with at least one filling nozzle in order to determine a degree of the filling pressure of the valve bag disposed at the filling nozzle. The controller determines a representative characteristic pressure value for the filling pressure present at a predetermined position (51) in front of the release position by means of a pressure sensor, and adjusts a rotational speed of the packing machine to the speed of the drive by way of a control unit.

The invention discloses a low-temperature stable storage method for polyamide acid glue liquid as well as a refrigerating liquid composition. The stable storage method for high-molecular-weight polyamide acid comprises the steps of: adding 0.8-1.3 wt% of isoquinoline and 0.08-0.13 wt% of octaploid hydrogen-containing siloxane into polyamide acid solution, lowering the temperature of the polyamide acid solution to be below 0 DEG C, stirring by utilizing a high-speed dispersion machine in a revolution of 2200-2500 revolutions per minute for 60-120 seconds, pressing the solution into a low-temperature storage tank to be stored after carrying out filtering and vacuum defoamation, and controlling the storage temperature of the storage tank at (-20)-(-5) DEG C by utilizing an ethylene glycol refrigerating liquid composition. According to the preparation method disclosed by the invention, during the storage and the use of the polyamide acid in an industrial production process of polyimide films, the low-temperature storage period is long, the time is controllable, the amidation reaction is avoided in the storage period, and the imidization can be fast carried out under an elevated temperature condition, the performance of the obtained film is relatively improved compared with the performance of the film subjected to thermal amidation, and the cost is lowered.

The invention discloses an aqueous phase preparation method for a chitosan-quantum dot fluorescent probe, which comprises the following steps of: A, preparing solution of carboxymethyl chitosan: weighing carboxymethyl chitosan, dissolving in a beaker by using double distilled water, and fixing the volume in a bottle for later use; B, preparing solution of CdTe quantum dot: according to the concentration of CdTe quantum dot, transferring the CdTe quantum dot solution to the beaker by using a transfer pipette, adding double distilled water, regulating the pH value to be 7-13, and fixing the volume in a bottle for later use; and C, mixing the prepared carboxymethyl chitosan solution and the CdTe quantum dot solution according to different volume ratios, shaking uniformly and standing at room temperature, or performing ultrasonic wave reaction, oscillating reaction or microwave heating reaction to obtain chitosan-quantum dot fluorescent probes with corresponding luminous wavelengths and different fluorescence intensities. The preparation method has the advantages of simple operation, good water solubility of products, long stabilization time, high yield of fluorescence quantum, good cellular compatibility, and wide application in the aspects of cell and macro-molecular biomarkers.

A device for determining an actual cell state of a resistive memory cell having a plurality M of programmable cell states comprising a sensing circuit, a settling circuit, a prebiasing circuit, and a resistor coupled in parallel to the resistive memory cell, wherein the resistor is configured to reduce an effective resistance seen by the prebiasing circuit. The sensing circuit is configured to sense a sensing voltage of the resistive memory cell and output a resultant value in response to the sensing voltage which is indicative for the actual cell state. The settling circuit is configured to settle the sensing voltage to a certain target voltage representing one of the M programmable cell states. The prebiasing circuit is configured to prebiase a bitline capacitance of the resistive memory cell such the sensing voltage is close to the certain target voltage.

The invention provides a repairing material for heavy metal polluted soil. The repairing material comprises, by mass, 1-8 parts of modified zeolite, 10-35 parts of modified sepiolite tailings, 10-20 parts of nano iron powder, 1-5 parts of sodium thiosulfate and 45-60 parts of quick lime. Meanwhile, the invention further provides a preparation method and application method of the repairing material. The zeolite and the sepiolite tailings are fully developed and used, the characteristics that the raw materials are cheap and easy to obtain, the preparation method is simple, control is easy, and the prepared soil heavy mental repairing material is good in effect and long in stabilization time are achieved, large-scale industrial production, application and popularization of the obtained repairing material are easy, and the repairing material has wide application prospects and practical value.

The invention discloses a hyperbranched nano-micron plugging material and a preparation method. The plugging material is prepared by polymerizing the following raw material components: a divinyl compound, an amino compound and a piperazine or piperidine compound; the mol ratio of the divinyl compound to the amino compound to the piperazine or piperidine compound is (1 to 3) to (1 to 2) to (1 to 2). The preparation method comprises the following steps: stirring and mixing the components according to the dosage and carrying out polymerization reaction under the protection of nitrogen gas to prepare the nano-micron plugging material. The plugging material disclosed by the invention can be dispersed well in drilling fluid; the nano-micron plugging material with stable granularity is used for reducing the porosity and penetration rate of a micro-crack stratum and the structural integrity of the micro-crack stratum is improved; an actual drilling safety density window is expanded and the stability of a shaft is strengthened.

The invention discloses an anti-wave emergency restoration process for a polluted natural water body. In a system for processing the water body by a flocculation method, short fibers accounting for 0.005 to 1 percent of the weight of the water body and a flocculating auxiliary agent accounting for 0.001 to 0.2 percent of the weight of the water body are added and the flocculating auxiliary agent can be cross-linked with a flocculating agent. The process comprises the following steps: firstly, adding the short fibers into the water body in advance or before the addition of the flocculating auxiliary agent and adding the flocculating auxiliary agent after the addition of the flocculating agent; secondly, generating microbubbles in the water body by using materials spontaneously generating gas to make compound flocs catch the microbubbles and achieve a compression compact effect during rising; and finally, catching the flocs and finishing the emergency restoration. The emergency restoration process can be suitable for performing restoration in the various natural water bodies with slight wind waves and complex hydrological conditions and fulfills the aim that the flocs cannot be easily destroyed by the wind waves within certain time, thereby effectively removing pollutants from the water body and solving the problem of effectively removing the pollutants from the water body in a low cost in the presence of wind waves.

The invention provides an intelligent electric induction decondensation system of a condensation pipeline. The intelligent electric induction decondensation system comprises a heating device, a control device and power supply devices. The heating device comprises the condensation pipeline and is used for heating the condensation pipeline through heat energy generated by alternating current flowing through the condensation pipeline in combination with the skin effect. The control device is used for controlling the work states of the heating device according to control signals generated according to a control instruction. The power supply devices are used for supplying power to the heating device and the control device and utilizing the impedance, electromagnetic induction, the proximity effect and the skin effect of the alternating current passing through the heating device for effectively converting electric energy into heat energy, and therefore the condensation pipeline is heated, and the work states (such as heating power) of the heating device are effectively controlled by the control device. The heating/heat tracing distance and temperature are freely controlled according to needs, construction is easy, operation is convenient, and stabilization time is long. The condensation pipeline can be heated better so as to achieve decondensation of the pipeline.

The invention discloses mining water base foam preventing coal spontaneous combustion. The mining water base foam comprises, by weight, 10-20 parts of lauryl sodium sulfate, 0.5-4 parts of cattle hoof and horn hydrolysate, one to two parts of hydroxypropyl methyl cellulose, two to four parts of dodecanol, one to two parts of cationic guar gum, 0.1-0.5 part of polystyrene-acrylic based emulsion particles, 0.5-2 parts of sodium chloride and 700-1500 parts of water. A manufacturing method of the water base foam comprises the steps that foaming agents are diluted by the water, stable adjusting agents are added to the foaming agents to form premixed foam liquid, compressed air with the pressure intensity of 100 kPa to 200 kPa is guided to a foam maker, after stable air flow exists on an outlet of the foam maker, the diluted premixed foam liquid is injected into the foam maker, the compressed air and the premixed foam liquid generate turbulent vortex in the foam maker, and the turbulent vortex is enhanced constantly to form the water base foam. The water base foam is high in foaming time, long in stable time and low in liquid drainage rate, the performance needs of foam materials are fully met, and meanwhile the water base foam can independently carry out oxygen isolation and cooling on a high-temperature fire source point.

The invention provides diacetylene-class thermochromic ink and a method for preparing the diacetylene-class thermochromic ink. The diacetylene-class thermochromic ink is formed by the raw materials of, by mass, 8-15 parts of diacetylene-class thermochromic materials, 40-50 parts of vegetable oil type varnish, 20-25 parts of calcium carbonate and 10-15 parts of barium sulfate. The diacetylene-class thermochromic ink is even in color component dispersion, strong in viscosity with print and fadeless, equipment used in the preparing process is simple, the ink can be transformed into mass production and is easy to popularize, productivity is formed, food grade materials are selected and used as raw and auxiliary materials according to rules, and the ink can be used for food package printing.

The invention relates to the technical field of medicaments, in particular to a camptothecin medicament injection solution and an injection and a preparation method thereof. The invention provides a camptothecin medicament injection which is good in stability, high in curative effect and low in toxicity and consists of the camptothecin medicament injection solution and a disperse medium, wherein the camptothecin medicament injection solution consists of a medicament active component, a stabilizing agent, a pH value regulator and an injection solvent. The medicament active component of the camptothecin medicament injection solution is a camptothecin medicament mainly existing in the form of a lactonic ring, which can improve the curative activity of the medicament and reduce toxic side effects; and the disperse medium is an injection emulsion, which can improve the dispersion degree of the camptothecin medicament and solve the problem that the camptothecin medicament is difficult to be prepared into the injection due to poor water solubility. The camptothecin medicament injection solution and the injection emulsion are packed and then stored respectively, and are mixed uniformly before use for intravenous administration, so the stability of the medicaments stored for a long time can be improved. The invention provides an intravenous injection which has low toxicity and is save and convenient to store for camptothecin medicaments.