13 results about "Mass ratio" patented technology

The invention belongs to the technical field of agriculture and discloses a functional seedling culturing substrate formula applicable to crop seedling culture of cucumbers, watermelons and melons, and a preparation method thereof. The functional seedling culturing substrate formula comprises turf, vermiculite, wheat stubbles and a palmitic acid solution, wherein the volume ratio of the turf to the vermiculite to the wheat stubbles is 2: 1: 0.375; the mass ratio of a substrate to the solution is 4: 1; the adding amount of the palmitic acid is 0.0256% of the total mass of a seedling culturing substrate. According to the functional seedling culturing substrate formula, the components are environment-friendly and pollution-free; the anti-disease capability of the seedling culturing substrate can be improved; compared with an existing seedling culturing substrate containing farmyard manure and a water-retaining agent, the functional seedling culturing substrate formula has the advantages of abundant raw materials, low cost, convenient manufacturing, capability of changing wastes into valuable things and the like. Self-rooted seedlings cultured by using the substrate do not need supplement of nutrient solutions; seedlings are regular and strong, do not excessively grow and have flourishing root system; the ecological environment of the soil can be improved after the seedlings are planted together with the substrate; the soil-borne pathogens can be effectively prevented and the output of melon products is improved.

The invention relates to the technical field of inorganic materials, and discloses a preparation method for a ferrous carbonate/graphene composite material. The preparation method comprises the steps of: I. mixing graphene materials, water-soluble ferrite, urea and water to form a suspension, wherein the mass ratio of the graphene materials to the water-soluble ferrite is (0.02-0.2):1, and the amount-of-substance concentration ratio of the urea to the water-soluble ferrite is (20-100):1; II. putting the suspension into a reaction kettle, controlling the temperature to be 100-180DEG C, and carrying out hydrothermal reaction for 4-12h to obtain the ferrous carbonate/graphene composite material. The invention further provides a lithium ion battery prepared by taking the ferrous carbonate/graphene composite material as a negative electrode material. By being synthesized through low-temperature hydrothermal reaction, the ferrous carbonate/graphene composite material is high in specific capacity and good in cycling performance, and has excellent development prospects after being applied to the negative electrode materials of the lithium ion battery.

A method for concentrating platinum and palladium from platinum-palladium flotation concentrates is composed of the following steps of adding sulfur of which the mass accounts for 0.2%-10% of the platinum-palladium flotation concentrates according to the mass ratio (1:3-9) of the platinum-palladium flotation concentrate to sulfuric acid solutions with the concentration of 150-250 g/L; leaching for1-5h under the oxygen partial pressure of 0.5-1.0 MPa, at the leaching temperature of 120-160 DEG C, pH of less than 0.5, and the stirring speed of 400-600 r/min; after leaching, maintaining the original stirring speed, cooling to 108-114 DEG C at the rate of 0.2-0.5 DEG C/min, and holding for 1-3h; continuously cooling to room temperature at the rate of 0.4-1.0 DEG C/min and the stirring speed of 150-300 r/min; and filtering to obtain leachate and leaching residues, and screening the leaching residues with a 100-mesh screen to obtain platinum-palladium concentrates and tailings. The method is simple in operation, and the purposes of concentrating precious metal including platinum and palladium as well as three-phase separation of base metal including copper, nickel, zinc, iron and silicate tailings are achieved synchronously; and the content and enrichment ratio of the precious metal in the platinum-palladium concentrates are high, and the subsequent separation cost is reduced obviously.

The invention relates to a de-orbiting sail unfolding method and a device thereof. The de-orbiting sail expanding device comprises an unfolding sail and a folding sail, wherein the unfolding sail is rotatably connected to the folding sail to form a de-orbiting sail for driving a star body to de-orbit; the folding sail comprises at least one first framework which can be used for folding a sail bodyin a folding state and supporting the sail body in an unfolding state, one or more of at least one first framework can start to rotate around the folding sail in a mode parallel to a first side in acase that a first included angle, to which the first side, opposite to the unfolding rail, of the folding rail rotates, of the folding rail and the unfolding rail is a first critical value; and moreover, the first side, opposite to the unfolding rail, of the folding rail continuously rotates, so that the first included angle can be continuously increased to define a second critical value, betweenthe folding sail and the unfolding rail, of the de-orbiting sail. Before being launched, the folding sail can be folded to reduce the size to the greatest extent; and under an unfolding state, the de-orbiting sail has an area-mass ratio which is big enough.

The invention discloses the technical field of disease and pest control, and particularly discloses a novel biological material for plant disease and pest control. The novel biological material for plant disease and pest control comprises 10-12 parts of methyl formate, 40-42 parts of methyl carbamate, 2 parts of a preservative, 12-14 parts of mother powder, 1-1.2 parts of a defoaming agent, 3-3.2parts of an antifreezing agent and the balance of a solvent, wherein the preservative is a mixed material of potassium sorbate, sodium diacetate and dehydroacetic acid, and the mass ratio of the potassium sorbate, the sodium diacetate and the dehydroacetic acid is 1:1:1.2; the mother powder is diethylaminoethanol acetate; the defoaming agent comprises emulsified silicone oil, a high-alcohol fattyacid ester complex and polyoxyethylene polyoxypropylene pentaerythritol ether, and the mass proportions of the emulsified silicone oil, the high-alcohol fatty acid ester complex and the polyoxyethylene polyoxypropylene pentaerythritol ether are equal. Through addition of the methyl formate, the fragrance of the novel biological material for the plant disease and pest control is enhanced to improvethe attention of pests, so that the pests take the initiative to eat the novel biological material for the plant disease and pest control, and thus the novel biological material for the plant diseaseand pest control has a relatively good long-lasting pesticide effect.

The invention discloses a cationic macromolecular proteolipid gene medicine carrier, a preparation method and an application, wherein the cationic macromolecular proteolipid gene medicine carrier is a macromolecular transferrin liposome prepared by transferrin-long-chain alkyl quaternary ammonium salt and a lipid ingredient in a mass ratio of (0.05 to 20): 1. The result of a gene transfection experiment indicates that the gene transfection efficiency of the macromolecular transferrin liposome in 293T cells, NIH-3T3 cells, liver cancer Huh-7 cells, SMMC-7721 cells, lung cancer A549 cells is equivalent to the gene transfection efficiency of a positive control, namely a cationic liposome Lipofectamine TM2000. The system of the cationic macromolecular proteolipid gene medicine carrier is good in biocompatibility, low in cytotoxicity, and capable of being used as an excellent non-viral gene medicine delivery carrier.

The invention relates to a preparation method of lithium niobate single crystal. The method comprises the following steps: (a) mixing niobium oxides and lithium carbonate according to the mass ratio of 79.1-79.2:20.8-20.9, and pressing the mixture to be blocky mixture after adding water; (b) adding the blocky mixture into a first heating furnace, heating the heating furnace from the room temperature to 1150 DEG C at the speed of 8-10 DEG C/min, and maintaining the temperature for 1.5-2 hours to obtain the initial product; and (c) adding the initial product into a crucible placing in a second heating furnace, adjusting the seed crystal rod to make the seed rod be concentric with the crucible, heating the initial product to melt the initial product, cooling the product to 1330-1350 DEG C, adjusting the rotating speed of the seed crystal rod to 8-15 rpm, declining the seed crystal in the lower end of the seed crystal rod to the meltwater to inoculate the crystal, and lifting upward the product at the speed of 4-6 mm/h to perform growth when the diameter of the seed crystal is expanded to 20-30 mm. The near-stoichiometric lithium niobate crystal with high purity and uniform component can be prepared by means of controlling accurately the conditions such as raw material proportion, technology step, and heating mode.

The invention belongs to the technical field of detection methods and particularly relates to a method for detecting the content of blue dyestuff in a textile and a leather product. The method comprises the steps ofby taking the textile or the leather product as a sample, and cutting the sample into pieces; weighing a certain amount of sample into a reaction pipe, then adding a polar organic solvent into the reaction pipe, enabling the mass ratio of the sample tothe polar organic solvent to be 1 to (5-50), and then putting the reaction pipe into an ultrasonic cleaner to carry out ultrasonic extraction; after the extraction is finished, taking out the reaction pipe, cooling, fully shaking, standing, and filtering supernatant liquor into a sample bottle; anddetectingand analyzingthe blue dyestuff in sample solution byadopting a high-performance liquid chromatograph with a diode array detector. Compared with the prior art, the method has the beneficial effects that not only can the qualitativeness be accurate, but also the quantitativeness can be accurate. The method has various advantages of low detection limit, good repeatability, low cost, convenience and fastness and the like, and the requirements of the European-union instructions and regulations for managing and controlling the blue dyestuff can be completely met.

The invention relates to the technical field of coal desulfurization, in particular to a technology for desulfurizing coal with large particle size by microwave-assisted halogen elements, and aims tosolve the technical problem of low desulfurization rate of the existing large-particle-size coal desulfurization method. The technology comprises following steps in sequence: S1, raw coal is crushed and screened; S2, the halogen elements are dissolved in water, and a desulfurization reagent is obtained; S3, a coal sample and the desulfurization reagent are mixed in a mass ratio of the desulfurization reagent to the coal sample of 2:1-20:1, and a mixed reactant is obtained; S4, the mixed reactant is irradiated under microwaves, the microwave frequency is 300-2500 MHz, the microwave radiation power is 300-1000 W, the microwave treatment time is 0.5-10 min, and the pressure is ordinary pressure; S5, the coal sample is filtered, washed and tested and subjected to repeated desulfurization untilthe coal sample is qualified, and a low-sulfur coal sample is obtained; S6, an oxidizing agent is introduced to oxidize halogen ions into the elements; S7, the halogen elements are extracted into anorganic solvent; S8, rectification is performed, and the halogen elements are extracted; and S9, fresh halogen elements are added, a new reaction reagent is prepared, and next desulfurization is performed.

The invention discloses a preparation method of a magnetic carbon material and belongs to the technical field of carbon materials. The problems that wastewater is produced in a conventional process ofpreparing the magnetic carbon material by taking ferroferric oxide as a magnetic component, the preparation process is complicated and equipment is expensive can be solved. The preparation method specifically comprises the following steps: taking ferrocene and red phosphorus as raw materials, uniformly mixing the two materials according to a feed mass ratio of (0.5-3):1, and heating in a closed reactor with oxygen content of 5-25%, wherein the temperature rise mechanism comprises the following steps: raising the temperature to 400-500 DEG C at a rate of 1-5 DEG C per minute, maintaining the constant temperature for 1-5 hours, and naturally cooling to a room temperature; opening the reactor to take out the reaction product, heating under the temperature condition of 40-80 DEG C, initiatingcombustion, and collecting the obtained black fluffy combustion product, namely the magnetic carbon material. The preparation method of the magnetic carbon material disclosed by the invention has theadvantages of being simple and reliable in process route, capable of realizing large-scale preparation and the like.

The invention discloses a metal-ceramic composite fibrous membrane tube and a preparation method thereof. The preparation method is characterized by comprising the following steps: mixing 0.2 to 1 mass percent of polyvinylpyrrolidone, 0.7 to 10 mass percent of polyether sulfone, 7 to 50 mass percent of N-methyl-1-pyrrolidone, 50 to 90 mass percent of metal with a ceramic material in a mass ratio of 3-10:1, and performing ball milling to prepare slurry; pressurizing to make the slurry extruded from a interlayer clearance of a spinning nozzle and water and/or ethanol extruded from an inner pipesimultaneously, and making the slurry enter the water and/or the ethanol to obtain a hollow tubular blank of the metal-ceramic composite fibrous membrane tube; and sintering the blank at a temperature of between 800 and 1,500 DEG C at a reducing atmosphere or in a vacuum degree of between 1*10<-4> and 1*10<1>Pa to obtain the metal-ceramic composite fibrous membrane tube. The metal-ceramic composite fibrous membrane tube solves the problem that the traditional ceramic membrane tube is difficult to assemble, cannot adapt to high temperature and harsh conditions and is difficult to form and sinter, and heat exchange performance and gas/liquid transmission rate can be improved.