13495 results about "Hydrochloric acid" patented technology

This disclosure relates to administration of a combination of: 1) about 100-110 mg, about 104-106 mg, or about 105 mg of bupropion hydrochloride, or a molar equivalent amount of a free base form or another salt form of bupropion; and 2) about 40-50 mg, about 44-46 mg, or about 45 mg of dextromethorphan hydrobromide, or a molar equivalent amount of a free base form or another salt form of dextromethorphan in certain patient populations, such as patients having moderate renal impairment, patients receiving a concomitant strong CYP2D6 inhibitor, patients who are known CYP2D6 poor metabolizers, those in need of an NMDA antagonist that does not cause dissociation, and those at risk of QT prolongation.

This disclosure relates to administration of a combination of: 1) about 100-110 mg, about 104-106 mg, or about 105 mg or less of bupropion hydrochloride, or a molar equivalent amount of the free base form or another salt form of bupropion; and 2) about 40-50 mg, about 44-46 mg, or about 45 mg or less of dextromethorphan hydrobromide, or a molar equivalent amount of the free base form or another salt form of dextromethorphan in certain patient populations, such as patients having moderate renal impairment, patients receiving a concomitant strong CYP2D6 inhibitor, patients who are known CYP2D6 poor metabolizers, those in need of an NMDA antagonist that does not cause dissociation, and those at risk of QT prolongation.

This disclosure relates to administration of a combination of: 1) about 100-110 mg, about 104-106 mg, or about 105 mg of bupropion hydrochloride, or a molar equivalent amount of a free base form or another salt form of bupropion; and 2) about 40-50 mg, about 44-46 mg, or about 45 mg of dextromethorphan hydrobromide, or a molar equivalent amount of a free base form or another salt form of dextromethorphan in certain patient populations, such as patients having moderate renal impairment, patients receiving a concomitant strong CYP2D6 inhibitor, patients who are known CYP2D6 poor metabolizers, those in need of an NMDA antagonist that does not cause dissociation, and those at risk of QT prolongation.

This disclosure relates to administration of a combination of: 1) about 100-110 mg, about 104-106 mg, or about 105 mg of bupropion hydrochloride, or a molar equivalent amount of the free base form or another salt form of bupropion; and 2) about 40-50 mg, about 44-46 mg, or about 45 mg of dextromethorphan hydrobromide, or a molar equivalent amount of the free base form or another salt form of dextromethorphan in certain patient populations, such as patients having moderate renal impairment, patients receiving a concomitant strong CYP2D6 inhibitor, patients who are known CYP2D6 poor metabolizers, those in need of an NMDA antagonist that does not cause dissociation, and those at risk of QT prolongation.

The invention relates to the field of concrete, and provides high-strength concrete and a preparation method thereof, and the high-strength concrete comprises modified basalt chopped fiber, a self-repairing agent, cement, fly ash, slag powder, coarse aggregate, natural sand, a water reducing agent and an air entraining agent. The modified basalt chopped fiber is oxidized by hydrogen peroxide, etched by hydrochloric acid and modified by a nano silicon dioxide coating, so that the interface bonding force is enhanced. The self-repairing agent is prepared by adopting expanded perlite to load bacillus through thallus culture, purification, dipping adsorption and low-temperature vacuum drying, CaCO3 deposition can be induced at concrete cracks, and self-repairing is achieved. The invention further provides a preparation method of the concrete. The preparation method comprises the steps of aggregate screening, hydrated liquid preparation, wet mixing, fiber and self-repairing agent adding, vibration forming and curing. The crack resistance of the concrete is improved by enhancing the fiber-matrix interface bonding force, meanwhile, the service life of the concrete is prolonged by utilizing a biological self-repairing technology, and the concrete is suitable for high-durability concrete engineering.

The invention discloses high-purity hafnium oxide and a preparation method thereof, and relates to the technical field of hydrometallurgy. The preparation method of the high-purity hafnium oxide comprises the following steps: crushing a hafnium oxide raw material to obtain hafnium oxide powder; sequentially carrying out alkali fusion, water immersion and filtration treatment on the hafnium oxide powder to obtain a hafnium hydroxide filter cake; dissolving the hafnium hydroxide filter cake in a sulfuric acid solution to obtain a hafnium sulfate solution; adding sodium sulfate into the hafnium sulfate solution to obtain hafnium-containing double salt; dissolving the hafnium-containing double salt in a sulfuric acid solution, heating, evaporating, cooling and crystallizing to obtain hafnium sulfate crystals; dissolving the hafnium sulfate crystal in concentrated hydrochloric acid to obtain a hafnium oxychloride solution, heating, evaporating, cooling and crystallizing to obtain a hafnium oxychloride crystal; dissolving the hafnium oxychloride crystal in pure water, adding an oxalic acid solution, and precipitating to obtain hafnium oxalate; and calcining hafnium oxalate to obtain high-purity hafnium oxide. The preparation method of the high-purity hafnium oxide is green, environment-friendly, simple and efficient.

The application provides a process method for preparing (2-(3,6-dimethoxy-9H-carbazol-9-yl)ethyl) phosphonic acid, and particularly relates to the technical field of organic synthesis. The process method is that, under alkaline conditions, a halogenated phosphonate compound is added into a 3,6-dimethoxy-9H-carbazole solution to perform a reaction, hydrochloric acid aqueous solution is added after the reaction to perform acidolysis degreasing, and finally (2-(3,6-dimethoxy-9H-carbazol-9-yl)ethyl) phosphonic acid is obtained through extraction, reflux adsorption and beating purification. The process method uses 3,6-dimethoxy-9H-carbazole as a starting material, realizes the synthesis of the target product through one-pot reaction, has mild reaction conditions, uses non-toxic raw materials which are easy to obtain, has simple synthesis process, is convenient to operate, and has high separation yield.

The invention relates to the technical field of lithium iron phosphate production, and discloses a carbon-coated titanium-doped lithium iron phosphate positive electrode material and a preparation method thereof.The preparation method comprises the following steps that 1, a ferrous solution and a phosphorus source solution are mixed in proportion, dopamine hydrochloride is added, a pH regulator is dropwise added in the stirring state, the pH of the solution is adjusted to 4.0-5.5, a reaction is conducted, a titanium source solution is added, and a reaction solution is obtained; after uniformly stirring, continuously dropwise adding a pH regulator to regulate the pH value of the solution to 5.5-6.5; the iron phosphate octahydrate coated with the titanium-embedded polydopamine is obtained; 2) calcining the titanium-embedded polydopamine-coated ferrous phosphate octahydrate in an inert gas atmosphere to obtain carbon-coated titanium-doped anhydrous ferrous phosphate; 3) mixing the carbon-coated titanium-doped anhydrous ferrous phosphate with lithium phosphate and a carbon source, ball-milling, mixing, spray-drying and calcining to obtain a carbon-coated titanium-doped lithium iron phosphate positive electrode material; the synthesis process is simple, and energy consumption is reduced.

The invention relates to the technical field of lithium dihydrogen phosphate, and discloses a method for preparing battery-grade lithium dihydrogen phosphate by using lithium precipitation mother liquor. The method comprises the following steps: (1) mixing a hydrochloric acid solution with a lithium precipitation mother solution until the pH value of the obtained reaction solution is 4-5; (2) heating the reaction solution, adding the sodium phosphate solution into the reaction solution to adjust the pH value to 9-10, and reacting to obtain crude lithium phosphate; (3) adding a phosphoric acid solution into the crude lithium phosphate until the pH value of the obtained mixed solution is 3-5.5; (4) carrying out first reduced pressure evaporation on the crude lithium dihydrogen phosphate solution, and carrying out solid-liquid separation on a first concentrate to obtain a first solid phase and a first mother solution; (5) dissolving the first solid phase in hot water, carrying out second reduced pressure evaporation, and carrying out solid-liquid separation on a second concentrate to obtain a second solid phase and a second mother solution; the solid content of the second concentrate is higher than that of the first concentrate. The lithium dihydrogen acid prepared by the method is high in purity, and the comprehensive yield of lithium is high.

A forest fire retardant composition contains a retardant compound that includes a potassium salt. The potassium salt may include a potassium salt of an organic acid, a potassium salt of an inorganic acid, or mixtures thereof. The organic acid may include formic acid, acetic acid, propanoic acid, butanoic acid, lactic acid, oxalic acid, malic acid, gluconic acid, tartaric acid, uric acid, malic acid, or citric acid. The inorganic acid may include sulfuric acid, phosphoric acid, carbonic acid, or hydrochloric acid. The composition may be in the form of a dry concentrate, a liquid concentrate, or a final diluted product. The final diluted product is effective in suppressing, retarding, and controlling forest fires while exhibiting corrosion resistance and low toxicity.

The invention discloses a p-methyl benzyl chloride production process and a production system thereof, p-xylene side chains and chlorine are subjected to a gas phase substitution reaction under micro negative pressure and visible light catalysis to generate crude methyl benzyl chloride and hydrogen chloride, and 99.0% methyl benzyl chloride, a small amount of benzyl dichloride and 31% hydrochloric acid are respectively generated through rectification and absorption; the device consists of four working sections of chlorination, rectification, hydrochloric acid absorption and distillation. According to the method, the defects in the prior art are overcome, on one hand, chlorine is introduced, and an aromatic ring chlorination reaction is carried out under visible light catalysis; on one hand, a supported catalyst filler is arranged at the bottom of a chlorination tower, and a zeolite molecular sieve modified by long-chain alkylsilane and supported by metal salt is used as a catalyst to catalyze chloromethylation reaction, on the other hand, the hydrophobicity of the modified catalyst is obviously enhanced, and meanwhile, the density of acidic sites is not reduced; the contact opportunity of the catalyst and a reaction substrate is greatly increased, and the catalytic efficiency of the catalyst is improved.

This disclosure relates to administration of a combination of: 1) about 100-110 mg, about 104-106 mg, or about 105 mg of bupropion hydrochloride, or a molar equivalent amount of a free base form or another salt form of bupropion; and 2) about 40-50 mg, about 44-46 mg, or about 45 mg of dextromethorphan hydrobromide, or a molar equivalent amount of a free base form or another salt form of dextromethorphan in certain patient populations, such as patients having moderate renal impairment, patients receiving a concomitant strong CYP2D6 inhibitor, patients who are known CYP2D6 poor metabolizers, those in need of an NMDA antagonist that does not cause dissociation, and those at risk of QT prolongation.

The invention discloses a method for preparing asphalt-based porous carbon based on an MgO template, and belongs to the technical field of porous carbon, nano MgO and deionized water are mixed and placed in a synthesis kettle, hydrothermal synthesis is performed at 180 DEG C for 2 h, suction filtration and drying are performed, a dried filter cake is crushed and calcined, and porous flaky MgO is obtained; adding the asphalt solution into the MgO suspension, stirring, drying to obtain brown powder, transferring the brown powder into a corundum crucible, putting the corundum crucible into a tubular furnace, calcining to obtain a carbonized C / MgO composite material, and washing the carbonized C / MgO composite material with a diluted hydrochloric acid solution and deionized water to obtain a carbon material sample recorded as AC-75. Pouring the porous carbon material PCs and KOH into a mortar, fully grinding, mixing and calcining to obtain an activated product, pickling and washing the product to be neutral, and drying to obtain the porous carbon material PCs. The raw materials selected by the method are asphalt and flake magnesium oxide which are stable in performance, low in price, large in amount and easy to obtain, a magnesium source can be recycled, environmental protection is achieved, and resources are saved.

The invention relates to a preparation method and application of an organosilicon / MOF-303 mixed matrix membrane, a silicon source precursor is uniformly dissolved in an ethanol solvent, then a mixture of water and hydrochloric acid is added according to a certain proportion, a water bath heating reaction is carried out for a period of time to obtain an organosilicon sol, prepared MOF-303 powder is added into the organosilicon sol according to a certain proportion, and the organosilicon / MOF-303 mixed matrix membrane is obtained. The preparation method comprises the following steps: uniformly mixing the raw materials through ultrasound to obtain a separation layer sol, coating the prepared separation layer sol on a ceramic support body through a hot coating method, and calcining in an air atmosphere for a period of time to obtain the MOF-303 / mixed matrix membrane. An organic silicon substance BTESA with a rigid acetylene bridge structure is preferably selected as a precursor, an MOF-303 material with a high specific surface area is doped into the precursor, the pore channel structure of the membrane is modified, more adsorption sites are provided for water molecules, and the composite membrane material with the optimal separation performance is obtained by optimizing the composite proportion.

The invention discloses a method for preparing a composite positive electrode material by using a waste battery, and belongs to the technical field of battery recovery. The method comprises the following steps: discharging, disassembling and sorting a waste lithium iron phosphate battery to obtain a positive plate, carrying out water treatment, separating from an aluminum foil to obtain a waste lithium iron phosphate sheet, adding sodium hypochlorite, tetraethoxysilane, deionized water and hydrochloric acid, stirring to obtain SiO2-coated iron phosphate precipitate particles and a lithium-containing solution, adding sodium hydroxide into the lithium-containing solution to adjust the pH value, and carrying out solid-liquid separation to obtain the lithium-ion battery cathode material. Adding sodium carbonate, heating and drying to obtain lithium carbonate precipitate. And adding a carbon source and alcohol into the SiO2-coated iron phosphate precipitate particles and lithium carbonate, carrying out ball milling, taking out, drying, and calcining in a protective atmosphere to obtain the positive electrode composite material. Compared with the prior art, according to the prepared positive electrode composite material, material particles contain a lithium silicate network, so that the specific discharge capacity of a battery material is effectively improved. The method is simple in process and suitable for comprehensive utilization of waste batteries.

The invention relates to the technical field of oxytetracycline hydrochloride conveying, in particular to an oxytetracycline hydrochloride airflow conveyor which comprises an airflow feeding pump, an inner pipe discharging mechanism arranged on the airflow feeding pump, an outer pipe resonance mechanism arranged in the inner pipe discharging mechanism and a powder distributing and conveying mechanism arranged on the outer pipe resonance mechanism. And the air flow feeding pump is used for providing air flow kinetic energy for transferring the powdery oxytetracycline hydrochloride. An independent airflow feeding pump is arranged on a path for preparing oxytetracycline hydrochloride of a powder rotating roller, when the airflow feeding pump operates, constant-pressure airflow released outwards passes through an inner pipe discharging mechanism, thrust applied by part of air pressure can bear a pressure gasket to vibrate at high frequency along with transmission of part of airflow into a vibration bin assembly, and therefore the effect that oxytetracycline hydrochloride is subjected to high-frequency vibration is achieved. And finally, the inner pipe clamped by the plurality of pressure-bearing gaskets can continuously release the airflow outwards in a corrugated state, so that the loss of the powdery oxytetracycline hydrochloride on the pipe wall due to standing can be avoided.

The invention discloses an external field reinforced molybdenum concentrate impurity removal method, and belongs to the technical field of molybdenum concentrate impurity removal. The method comprises the following steps: (1) microwave enhanced chloridizing roasting: uniformly mixing the molybdenum concentrate and calcium chloride, and carrying out microwave heating roasting in an inert atmosphere protection environment to obtain a roasted product; (2) ultrasonic enhanced acid leaching: adding the roasted material obtained in the step (1) into a hydrochloric acid solution, leaching under an ultrasonic condition, and then sequentially carrying out suction filtration, washing and drying to obtain an acid leached material; and (3) ultrasonic enhanced alkaline leaching is conducted, specifically, the acid leaching material obtained in the step (2) is added into a sodium hydroxide solution, leaching is conducted under the ultrasonic condition, then suction filtration, washing and drying are conducted in sequence, and iron and silicon removal of the molybdenum concentrate is completed. By means of the method, the iron and silicon removal effect of the molybdenum concentrate can be effectively improved, and the iron and silicon removal rate can reach 97% or above.

The invention relates to low-carbon high-durability concrete in the field of concrete. The low-carbon high-durability concrete comprises the following components in parts by weight: 30-35 parts of cement, 40-46 parts of a cementing material, 180-190 parts of coarse aggregate, 150-160 parts of fine aggregate, 4-6 parts of an air entraining and water reducing agent and 60-70 parts of water, the cementing material comprises the following components in percentage by weight: 50-55% of granulated blast-furnace slag, 5-10% of steel slag, 3-5% of desulfurized gypsum, 1-3% of tailings, 2-4% of desulfurized fly ash, 2-4% of red mud, 3-5% of a reinforcing agent and the balance of silicon hydrochloric acid cement clinker. The method has the effect of improving the durability and strength of the low-carbon concrete.

The invention discloses a salt leaching-extraction method for recycling lithium iron phosphate and ternary lithium battery powder through cascade circulation, and belongs to the technical field of waste lithium battery recycling. According to the method, ferric salt is adopted as a leaching agent, a circulation mechanism is constructed through iron ion valence state conversion, and cascade leaching circulation of waste lithium iron phosphate and nickel cobalt lithium manganate battery powder is achieved. A concentrated enrichment liquid containing lithium, nickel, cobalt and manganese, iron phosphate and a graphite crude product can be obtained through multiple leaching cycles. In the leaching circulation process, a mixed solvent is developed as an extraction agent of iron ions, and after extraction and hydrochloric acid reverse extraction are carried out on a leaching solution containing iron salt, the leaching agent and the extraction agent can be recycled. According to the method, the valuable metal in the waste battery powder is efficiently leached under the milder reaction condition, consumption of chemicals such as acid and alkali, a leaching agent, an oxidizing agent and an extracting agent is effectively reduced through research of a circulation mechanism, the cost is remarkably reduced, and good environmental benefits and economic benefits are achieved.

The invention provides a robot joint dynamic cable made of a self-repairing polyurethane material and a preparation method of the robot joint dynamic cable, and belongs to the field of cables. Polytetrahydrofuran glycol and hexamethylene diisocyanate react to form a soft and hard segment structure, 1, 4-butanediol is added for chain extension, dopamine hydrochloride is introduced, the hard segment structure is enhanced, and a self-repairing hydrogen bond network is formed; carbon nanotubes are introduced, and through plasma treatment and silane coupling agent modification, the tensile resistance, fatigue resistance and electrical properties of the material are improved; montmorillonite is compounded with polyethyleneimine through organic treatment, so that the cracking resistance and wear resistance of the material are enhanced; epoxy groups are introduced to the surface of boron nitride, and dopamine hydrochloride is self-polymerized, so that excellent heat dissipation capability and dimensional stability are provided. Through the synergistic effect of the components, the composite material has excellent mechanical properties, electrical properties, heat dissipation, wear resistance and the like, is especially suitable for a dynamic cable of a robot, and can stably work in a complex environment for a long time.

The invention discloses flaky silver-coated aluminum powder of a core-shell structure and a preparation method and application of the flaky silver-coated aluminum powder, and particularly relates to the field of electromagnetic shielding materials. Comprising the following steps: carrying out pretreatment of removing an oxidation film on flaky aluminum powder; dispersing the pretreated flaky aluminum powder in a tris (hydroxymethyl) aminomethane hydrochloride aqueous solution, and adding dopamine hydrochloride to carry out polymerization reaction to obtain flaky aluminum powder coated with a polydopamine layer; the flaky aluminum powder coated with the polydopamine layer is subjected to activating treatment through silver nitrate, and activated flaky aluminum powder is obtained; the activated flaky aluminum powder and a silver-ammonia solution are mixed, a reduction solution is added for a silver mirror reaction, flaky silver-coated aluminum powder is obtained, and the structure of the flaky silver-coated aluminum powder is that the surface of the flaky aluminum powder is sequentially coated with a polydopamine layer and a silver shell layer from inside to outside. And the environmental stability and the corrosion resistance of the flaky silver-coated aluminum powder are improved.

The invention belongs to the field of new materials, and particularly relates to preparation and application of chemical copper plating cellulose composite fibers. The preparation method of the composite fiber comprises the following steps: (1) mixing absolute ethyl alcohol, ammonia water and water in proportion, adding cellulose fiber, heating, stirring and uniformly mixing, adding a dopamine hydrochloride solution, washing and drying to obtain a polydopamine coating / cellulose composite fiber; (2) adding the composite fiber prepared in the step (1) into an alkaline solution, adding a silver nitrate solution, stirring, washing and drying to obtain a polydopamine reduced nano-silver / cellulose composite fiber; and (3) adding the composite fiber obtained in the step (2) into a chemical plating solution containing copper ions for plating to obtain the chemical copper-plated cellulose composite fiber. The electroless copper-plated cellulose composite fiber shows outstanding electric heating and photo-thermal properties, can accurately capture electrocardiosignals of a human body before and after movement at the same time, and provides a new thought for development of wearable electronic fabrics and intelligent sensors.

The preparation method comprises the following steps: S1, mixing a hydrochloric acid solution with organic sodium sulfonate, then adding aniline and water, stirring and dissolving, then adding an oxidizing agent to carry out doping reaction, and carrying out suction filtration, washing, drying and grinding on a reaction product to obtain sodium-modified polyaniline; s2, uniformly mixing a negative electrode active material, a conductive agent and polytetrafluoroethylene, and then adding sodium polyaniline and an organic sodium supplement agent in a nitrogen or inert atmosphere for fibration treatment to obtain fibration powder; and S3, performing hot pressing on the fiberized powder onto the current collector to obtain the lithium ion battery. The prepared pre-sodium-modified negative electrode dry-method electrode has relatively good peeling strength and pole piece flexibility, and the condition that a traditional wet-method thick electrode is easy to crack is relieved; meanwhile, the dry-method electrode subjected to sodium modification treatment can induce uniform deposition of sodium ions, so that the dynamic performance of the whole sodium battery is improved, the problem of cyclic sodium precipitation is avoided, and the service life of the battery is further prolonged.

The invention relates to the technical field of special papermaking and carbon fiber composite material preparation, in particular to high-air-permeability pitch-based carbon fiber base paper and a preparation technology thereof.The preparation method comprises the following steps that 1, pitch-based carbon fibers A are cleaned with diluted hydrochloric acid; dividing and brooming aramid fibers to obtain aramid pulp B; 2, performing wet forming on the pitch-based carbon fibers and the aramid pulp to obtain carbon fiber paper; and step 3, impregnating the pitch-based carbon fiber paper with phenolic resin, drying, and finishing to obtain the pitch-based carbon fiber base paper. The invention provides a novel method for preparing the high-air-permeability carbon fiber base paper through acid cleaning of carbon fibers, fibrillation of aramid fibers, wet forming of mixed pulp, resin impregnation strengthening and hot-pressing finishing, and the method comprises the steps that aramid pulp assists in interweaving, low-concentration resin strengthening is conducted, and the high-air-permeability carbon fiber base paper is obtained; the problem that strength, flexibility, high conductivity and high air permeability are difficult to consider at the same time is solved, and the high-air-permeability carbon fiber base paper and the preparation process thereof are provided.

The invention relates to Omarlliptin, in particular to a novel method for preparing Istradafylline, and relates to a preparation method of Istradafylline, in particular to a preparation method of Istradafylline. The method comprises the following steps: carrying out coupling reaction on a compound Ia and TMS acetylene to obtain an intermediate Ib; carrying out bromination reaction on the intermediate Ic under the action of NBS (N-bromosuccinimide) to obtain an intermediate Id; carrying out substitution reaction on the intermediate Id and tert-butyl carbamate under the action of potassium tert-butoxide to obtain an intermediate Ie; reacting the intermediate Ie with paraformaldehyde to obtain an intermediate If; carrying out cycloaddition reaction on the intermediate If and the intermediate Ib to obtain a key intermediate Ig; carrying out asymmetric catalytic hydrogenation reduction on the intermediate Ig to obtain an intermediate Ih; and removing a protecting group from the intermediate Ih in a hydrochloric acid and ethyl acetate system to obtain a final product. The method is short in route, simple and convenient to operate, mild in condition, high in reaction yield, environment-friendly and easy for industrial production, and dangerous and highly toxic products are prevented from being used and hazardous chemicals are supervised. # imgabs0 #

The invention provides a preparation method of a semiconductor structure and the semiconductor structure, and particularly relates to the technical field of semiconductors. The preparation method of the semiconductor structure comprises the following steps: providing an initial semiconductor structure, wherein a metal layer is deposited on the initial semiconductor structure; performing first annealing treatment on the metal layer to generate a metal silicon compound; processing the initial semiconductor structure by using a first cleaning solution, wherein the first cleaning solution is a mixed solution of sulfuric acid, hydrogen peroxide and ferrous ions; processing the initial semiconductor structure by using a second cleaning solution, wherein the second cleaning solution is a mixed solution of hydrochloric acid, hydrogen peroxide and water; and performing second annealing treatment on the metal silicon compound to generate a self-aligned silicide layer. By adopting the preparation method of the semiconductor structure, the removal temperature of the unreacted metal layer can be reduced, the influence and damage of high temperature on the thermal stability of the metal silicon compound are avoided, and the product yield is improved.

The invention discloses a porous titanium-based implant with a photo-thermal surface and a preparation method and application of the porous titanium-based implant, and belongs to the technical field of biomedical materials. The preparation method comprises the steps that a porous titanium substrate is prepared through 3D printing, then flowing acid etching treatment and anodic oxidation treatment are conducted in sequence, then the porous titanium substrate is placed in photo-thermal coating dispersion liquid for reaction, cleaning and drying are conducted, and the porous titanium-based implant with the photo-thermal surface is obtained. The photo-thermal coating dispersion liquid is obtained by dispersing MXene-ZnO composite particles in a dopamine hydrochloride solution. The porous titanium-based implant provided by the invention can be rapidly heated to a proper temperature under the irradiation of near-infrared light, and has good antibacterial, anti-tumor and osteogenesis promoting properties and biocompatibility.

The invention provides homogenized pitaya polysaccharide as well as a preparation method and application thereof, and belongs to the technical field of polysaccharide extraction and purification. The homogenized pitaya polysaccharide is a polysaccharide of which the monosaccharide is composed of mannose, glucosamine hydrochloride, rhamnose, glucuronic acid, galacturonic acid, glucose, galactose and arabinose, the relative molecular weight is 8.08 * 10 < 4 > Da, and the corresponding molar ratio is (0.181): (0.250): (16.544): (12.762): (3.793): (0.739): (51.014): (14.716). The invention further provides a preparation method of the homogenized pitaya polysaccharide and application of the homogenized pitaya polysaccharide in preparation of lipid-lowering and sugar-lowering drugs. The homogenized pitaya polysaccharide disclosed by the invention has an obvious lipid-lowering and blood-glucose-reducing effect, is from a natural product, so that the homogenized pitaya polysaccharide has no toxic or side effect and can be used for preparing lipid-lowering and blood-glucose-reducing medicines.

The invention provides a lignite-based supercapacitor activated carbon electrode material and a preparation method thereof, and belongs to the technical field of electrochemical power supply material preparation. The preparation method comprises the following steps: S1, performing hydrochloric acid pickling on lignite raw coal powder for X2 hours, performing hydrofluoric acid pickling for X2 hours, and heating a calcium phosphate solution for deoxidation to obtain pretreated lignite; s2, uniformly stirring and mixing the pretreated lignite, an alkaline activator and deionized water according to the mass ratio of 1: X4: (5-10) to obtain a mixture; s3, activation is conducted, the activation temperature is X1 DEG C, and the activation time is X3 h; cooling to obtain a roasted product; s4, acid pickling with diluted hydrochloric acid; the specific capacitance of the active carbon electrode material is Y F / g, wherein Y = a + b * X1 + c * X2 + d * X3 + e * X4-f * X1 * X2 + g * X1 * X3 + h * X1 * X4 + i * X2 * X3 + j * X2 * X4 + k * X3 * X4-l * X12-m * X22-n * X32-o * X42. The preparation method is simple, the cost is low, the process repeatability is good, the prepared porous carbon has a high specific surface area, and the power density and the cycling stability of the supercapacitor are improved.

The invention relates to the technical field of cosmetics, and provides a composition containing a dendrobium officinale enzymolysis extract, which is prepared from the following components in percentage by mass: 18 to 22 percent of dendrobium officinale enzymolysis extract, 9 to 11 percent of chitosan oligosaccharide, 6.5 to 7.5 percent of bionic moisturizing enhancer, 0.1 to 0.2 percent of sodium alginate, 0.05 to 0.15 percent of citric acid / sodium citrate buffer pair and 60.4 to 65.4 percent of solvent matrix. By combining low-temperature enzymolysis with a biological purification process, efficient extraction of dendrobium candidum polysaccharides and phenolic substances is realized, dendrophenol oxidation inactivation caused by high temperature can be effectively avoided, hydrochloric acid residues in chitosan oligosaccharide preparation are effectively removed, formula irritation is remarkably reduced, and the dendrobium candidum extract is more suitable for sensitive skin care; the components in the composition have a synergistic effect, the dendrobium officinale enzymolysis extract and the enzymolysis chitosan oligosaccharide form a composite moisturizing network, the moisturizing rate is remarkably increased, the oxidation resistance is remarkably improved, and the composition can be applied to products such as essence, masks and freeze-dried powder.