99results about How to "Spatial structure is stable" patented technology

The invention discloses a methanol-gasoline-resisting static-electricity-conducting anticorrosive paint, which is prepared by the following raw materials according to weight: a component A consisting of 25-39 parts of epoxy resin, 5-20 parts of pigment and filler, 15-28 parts of static-electricity-conducting filler, 0.2-2 parts of carbon nanotubes, 0.3-1 part of cinnamyl aldehyde, 2-6 parts of auxiliaries, and 5-16 parts of diluent, and a component B consisting of 7-11 parts of modified aromatic aliphatic amine hardener. According to the invention, the epoxy resin is formed by epoxy phenolic resin and bisphenol F-type epoxy resin according to a weight ratio of 3:(1-3), and the modified aromatic aliphatic amine hardener is one out of D9050 and D9340 or the mixture of the two. According to the invention, the component A and the component B are prepared first respectively. When in use, the component B is slowly added into the component A to be stirred uniformly to obtain a final product. The anticorrosive paint prepared in the invention can resist permeation and corrosion of strong solvents, and free particles cannot be separated out from the methanol gasoline after long-term storage, thereby preventing influence resulted by storage to the quality of a finished oil product.

The invention discloses a method for preparing Nisin / chitosan / polylactic acid composite nanofiber mats by coaxial electrospinning. The method comprises the following steps: dissolving chitosan in an acetic acid solution, stirring and dissolving to prepare a chitosan solution; adding Nisin, stirring to prepare a Nisin / chitosan solution which is used as a shell spinning solution for coaxial electrospinning; dissolving polylactic acid in dichloromethane to prepare a polylactic acid solution which is used as a core spinning solution for coaxial electrospinning; and carrying out coaxial electrospinning on the shell spinning solution and the core spinning solution to prepare the Nisin / chitosan / polylactic acid composite nanofiber mat with Nisin and chitosan as the shell and with polylactic acid as the core. The method is simple and feasible, and cost is low. The prepared biodegradable bioactive antiseptic composite nanofiber mat can be used in the fields of wound dressing, tissue engineering and food package and the like, has excellent antibacterial effects, is safe and harmless, and will not cause drug resistance of bacteria.

The invention which belongs to the solid waste resource field relates to a cyclically degradable granulated conditioning agent and an application of the conditioning agent in sludge compost. Problems of large dosage, difficult recycle, sludge compost cost increase, slow late degradation and compost period prolongation of traditional organic conditioning agents are solved, and problems of the residual of an inorganic conditioning in the compost and finished product quality reduction are simultaneously solved. The cyclically degradable granulated conditioning agent of the invention is a wood homogeneous body with particle sizes of 0.5-10cm. The application comprises the following steps: 1, mixing sludge with the conditioning agent to obtain a mixture; 2, fermenting the mixture at a high temperature; and 3, discharging the obtained material after the fermentation, and screening out the conditioning agent, wherein the screening rate is greater tan 98%. The conditioning agent of the invention has the advantages of stable space structure, good fluidity, easy screening, recyclable use, good hydroscopicity, water adjustableness, good microbial adhesiveness, recyclable inoculation, and no influence of the finished product quality by the residual. The conditioning agent has very high popularization and application values.

The invention discloses a compound with electrochemical response to formaldehyde and a preparation method thereof. The cobalt complex electrocatalytic material is a 4,4'-dipyridine sulfadiazine cobalt compound with certain space structure, and the molecular formula is C40H34CoN12O4S2. The preparation method of the sulfadiazine cobalt compound electrocatalytic material is implemented by carrying out chemical reaction on sulfadiazine with conjugated extended pai bond and 4,4'-dipyridine to obtain the novel cobalt compound. The compound used as an electrocatalytic active material has accurate space structure and accurate molecular formula; the cobalt ions can form stable coordinate bonds with the ligand by utilizing 3d orbit, thereby being beneficial to the transfer of electrons and promoting the proceeding of the electrochemical reaction, and thus, the compound has favorable electrocatalytic activity for formaldehyde. The cobalt complex used as the electrocatalytic active material has wide application prospects.

The invention relates to a method for detecting alpha-fetal protein on the basis of an RGO-CS-Fc / Au NPs nano composite material and aptamers. According to the method, the surface of a silk-screen printing electrode is modified with RGO-CS-Fc / Au NPs by means of an electro-deposition technology and an electrostatic adsorption effect; AFP aptamers are loaded on the surface of the RGO-CS-Fc / Au NPs bymeans of a nanotechnology and an intermolecular force, and the aptamers exist on the surface of the composite material in the form of single-chain structures due to the unstable spatial structures ofthe aptamers; after AFP is added into the surface of the electrode, the AFP can be specifically combined with the AFP aptamers, so that stable spatial structures can be generated, and therefore, the AFP and the aptamers can be orderly arranged on the surface of the electrode; a current value is detected through a DPV method, a relation curve of current and the concentration of the alpha-alpha protein is depicted; and therefore, the quantitative detection of the alpha-alpha protein is realized. The method has the advantages of simple operation, time-saving performance, low cost and low detection limit.

The invention provides high-strength anti-puncturing graphene modified plastic which comprises the following materials in parts by weight: 40-80 parts of PA66, 30-60 parts of glass fiber, 0.8-3 parts of graphene, 0.5-1.5 parts of nanometer zinc oxide, 0.3-2 parts of surface active agent, 0.1-1 part of dispersing agent, 0.5-2.5 parts of coupling agent and 0.1-0.6 part of antioxidant. According to the invention, PA66 is used as a plastic substrate and the graphene is utilized to modify, so that the mechanical property of the plastic is promoted; the graphene is subjected to nanometer zinc oxide intercalated modification, so that the dispersing performance of the graphene is obviously promoted; the other auxiliary additives jointly have a cross-linking effect on the plastic, so that the toughness of the plastic is greatly promoted; and the plastic has an excellent anti-puncturing property and is light and practical.

The present application discloses a composite reverse osmosis membrane and a preparation method thereof. The method includes: uniformly mixing fluorine-containing polyaryletherketone of a certain concentration and silane-modified polyaryletherketone as a casting solution; coating a non-woven fabric, i.e., a substrate, with the casting solution to form a support layer; then coating the surface of the support layer with a solution A and a solution B sequentially for reaction to form a polyamide desalination layer; and coating the polyamide desalination layer with a modified polyvinyl alcohol anti-pollution layer. By means of the method, the composite reverse osmosis membrane is prepared. Compared with the prior art, the present application can prepare a composite reverse osmosis membrane with high temperature resistance and high strength by using the composite modified polyaryletherketone as the support layer, and moreover, uses polyvinyl alcohol as a component of the anti-pollution layer, and has good anti-pollution properties.

The invention discloses a production method for a fulvic acid potassium and EDTA chelating state microelement complex fertilizer, belongs to methods for manufacturing fertilizer, and particularly relates to a mixture of one or more fertilizers and un-specific fertilizer efficiency components. The production method comprises the steps as follows: ethylenediamine tetraacetic acid disodium and sodium hydroxide are added firstly; then various metal alkalis are added to generate EDTA chelated calcium, iron, manganese, copper, zinc and magnesium; potassium borate potassium molybdate and fulvic acid potassium are added, so that the finished product chelating state microelement complex fertilizer is obtained. The invention provides a novel production method for the fulvic acid potassium and EDTA chelating state microelement complex fertilizer, according to the method, EDTA disodium and metal ions are prepared according to the proportion of 1:1, acid-base reaction is performed, the product is an ionic compound formed through an ionic bond, the ionic bond is more stable than a coordinate bond, the liquid fertilizer prepared through the method has a stable space structure, can effectively prevent the metal ions to form insoluble substances with acid radical ions in soil, and has the favorable effects of yield increase and agricultural product quality improvement.

The invention discloses pyridylamine chelate resin for removing heavy metal cations in strong acid wastewater and a preparation method of the pyridylamine chelate resin, which belongs to the field ofwater treatment. The pyridylamine chelating resin has the following structural units: x represents the number of units of an o-methylpyridylamine structure, x is greater than or equal to 1, n represents the number of structural units of a resin macromolecular skeleton, n is greater than or equal to 800 and less than or equal to 5000, and R1 represents H or an alkyl chain CH3; the applicable heavymetal cations comprise Cd (II), Ni (II), Cu (II), Zn (II), Co (II) and the like. The pyridylamine chelating resin provided by the invention is wide in preparation raw material source, low in cost, simple in synthesis steps and easy for large-scale production.

The invention discloses a preparation method of a pyridine-functionalized chitosan adsorbent. The preparation method includes the following steps that S1, polyethyleneimine with the mass concentrationbeing 5-100g / L, 2-picolyl chloride hydrochloride with the mass concentration being 2.5-100g / L, and sodium carbonate with the mass concentration being 10-100g / L are dissolved in an aqueous solution ofethyl alcohol with the volume concentration being 5-80%. According to the preparation method of the pyridine-functionalized chitosan adsorbent, the pyridine-functionalized chitosan adsorbent can be applied to the fields such as simultaneous removal of heavy metal and antibiotics in livestock and poultry breeding wastewater under a wide pH range, the technical problems such as small adsorption capacity and slow adsorption rate in collaboratively adsorbing the heavy metal and the antibiotics, large resin demand in engineering, long operation time, small adsorption capacity or even no adsorptionunder strong acid conditions and the like are solved, and economic and environmental benefits are remarkable.

The invention discloses a molecularly-imprinted nanoparticle for glycoprotein and a synthesis method thereof, belongs to the field of analytical chemistry, and relates to synthesis of molecularly-imprinted polymers. The synthesis method comprises the following steps: firstly, preparing a solution phase A from template glycoprotein molecules, preparing a solution phase B from a functional monomer and a cross-linking agent, and preparing solution phase C from an initiator; secondly, respectively fixing the solution phase A, the solution phase B and the solution phase C on three micro-fluidic injection pumps with adjustable flow rates, connecting and mixing the solution phase A and the solution phase B through a Y-shaped three-way valve, connecting and mixing the mixed solution and the solution phase C through another Y-shaped three-way valve, and enabling the obtained mixed solution and the solution phase C to flow into a reactor for a polymerization reaction; and finally, collecting a polymerized nanoparticle at the tail end of the reactor, and removing the glycoprotein template molecules to obtain the molecularly-imprinted nanoparticle for glycoprotein. The molecularly-imprinted nanoparticle for glycoprotein is prepared in a microfluidic mode, operation is easy, continuous production can be achieved, and the obtained molecularly-imprinted nanoparticle can be used for specific recognition of target glycoprotein molecules.

The invention relates to a Beta lamellar blocking peptide which can be used for preventing and / or curing Alzheimer's disease and the application of the polypeptide used for preventing and / or curing Alzheimer's disease.

The invention relates to a rare-earth-doped lithium manganese silicate positive electrode material and a microwave-assisted preparation method thereof. The preparation method mainly comprises the following steps that firstly, a certain quantity of lithium sources, manganese sources, silicon source compounds, carbon source additives and rare earth compounds serve as raw materials to prepare a rare-earth-doped lithium manganese silicate material precursor; secondly, the precursor is placed in a microwave field for microwave sintering under a protective gas atmosphere to obtain the rare-earth-doped lithium manganese silicate positive electrode material. According to the preparation method, the stability of the material is improved through the octahedral site preference energy characteristic of rare earth elements; the excellent wave absorbing property of the rare earth elements and microwave-assisted thermal treatment are combined, so that the wave absorbing property of the material is remarkably improved, then reaction frequency is increased when microwaves are propagated in a base material, a reaction can be conducted more sufficiently, the purity of the product is improved, and theelectrochemical performance of the material is further optimized; the synthesis period is shortened, and the production efficiency is improved.

The invention provides microwave dielectric ceramic. The microwave dielectric ceramic comprises compound oxide; the compound oxide has a general formula shown as follows: Ba2-xSm4+2 / 3xTi9-yMnyO26, wherein x is greater than or equal to 0 and less than or equal to 0.32 and y is greater than or equal to 0 and less than or equal to 0.02. Compared with the prior art, the microwave dielectric ceramic provided by the invention takes the compound oxide shown as the specific general formula as a main body material, the dielectric constant can be adjusted in a range of 73 to 80 through adjusting the content of Sm and the frequency-temperature coefficient is continuously adjustable; on one hand, Ti is replaced with less Mn and is used as an acceptor for doping; on one hand, the radius of an Mn atom is slightly greater than the Ti; when the Mn is added, a space structure can be stabilized and the Q*f value is improved; on the other hand, the reduction of the Ti is inhibited by utilizing valence alternation of the Mn in a sintering process, so that the Q*f value is improved; the microwave dielectric ceramic is stable in structure and low in sintering temperature and has relatively high dielectric constant and Q*f value; meanwhile, the resonance frequency-temperature coefficient is continuously adjustable so that the microwave dielectric ceramic has a very wide application prospect in the field of microwave communication and large-scale commercial utilization can be realized.

A cloud gel electrolyte for lead-acid storage batteries relates to the field of production technology of a cloud gel electrolyte used for lead-acid storage batteries. The electrolyte is prepared by mixing mainly sulfuric acid, cloud gel powder, an activated assistant, an additive, and deionized water. The electrolyte has good homogeneity, does not hydrate or become stratified, is convenient for filling operations, and is widely applicable to lead-acid storage batteries with various specification models by adjusting component ratios in the electrolyte. Storage batteries filled with the cloud gel electrolyte has a large initial capacity, strong charge acceptance, excellent low-temperature resistance, good starting performance, stable discharge performance, and long cycle life.

The invention provides a thermosetting liquid optical adhesive composition and an application thereof; the thermosetting liquid optical adhesive composition is tested according to a GB / T 4509-2010 asphalt needle penetration determination method, and the needle penetration of the thermosetting liquid optical adhesive composition is 160-250 mm. The thermosetting liquid optical adhesive provided by the invention has proper needle penetration after being cured, is easy to repair, does not greatly fluctuate along with the influence of temperature, humidity, UV aging irradiation and the like, and has higher cohesion strength, better binding power and excellent binding power for a binding material of a display module.

The invention relates to a modified carbon nanotube reinforced shape memory epoxy resin composite material and a preparation method thereof. The composite material is prepared from the following raw materials: epoxy resin, a curing agent, a catalyst and modified carbon nanotubes, and the modified carbon nanotubes are carbon nanotube powder of which the surface is modified with epoxy groups. The invention also provides a preparation method of the modified carbon nanotube reinforced shape memory epoxy resin composite material. The method comprises the following steps: grafting carboxyl on the surface of the carbon nanotube, and then grafting an epoxy group; and uniformly mixing the modified carbon nanotubes, epoxy resin, a curing agent and a catalyst, and pouring the mixture into a mold forcuring. The modified carbon nanotube reinforced shape memory epoxy resin composite material provided by the invention shows good application performance in the aspects of mechanical strength, toughness, the shape memory performance and the like.

The invention discloses a method for industrially improving the storage stability of transglutaminase, and belongs to the technical field of enzyme preparations. The method includes adding exogenous substances such as salt, carbohydrate or derivatives of the carbohydrate, proteins and alcohol in transglutaminase fermentation broth and precipitating the fermentation broth by the aid of ethyl alcohol to obtain precipitates; adding amino acid or maltodextrin into the precipitates and uniformly mixing the precipitates and the amino acid or the maltodextrin with one another; carrying out spray drying to obtain transglutaminase preparation powder. The method has the advantages that synergistic effects of the diversified exogenous substances are realized, accordingly, the enzyme activity can be effectively improved, and the yield can be effectively increased; the method is easy to operate, and effects for obviously relieving the degrees of enzyme activity decrease due to external environmental factors in transglutaminase processing procedures and transglutaminase storage procedures can be realized by the method.

The invention relates to a preparation method of a high-toughness nanofiltration membrane, and belongs to the technical field of separation membrane preparation. According to the invention, the methodcomprises the following steps of melting and dispersing N,N'-dicyclohexylcarbodiimide in an adipic acid solution; dropwise adding methoxybenzoic acid diphenol monoester after dispersing, conducting heating, mixing and stirring; after stirring, performing suction filtration and drying to obtain a filter cake; mixing the filter cake with thionyl chloride; conducting heating condensation reflux reaction, conducting concentrating in vacuum to obtain a reflux product; mixing and stirring the reflux product and chitosan at a low temperature, and conducting freezing; conducting filtering in a freezing state to obtain a modified filter cake; and finally, mixing the modified filter cake with chitosan and acetic acid, and after mixing, coating a glass plate with the mixture and conducting drying toobtain the high-toughness nanofiltration membrane. According to the preparation method, polysulfone and N,N'-dicyclohexylcarbodiimide are used for modifying chitosan, so that a charged group is introduced into the chitosan, the interception capability of the nanofiltration membrane is enhanced, and an amide group is generated on a chitosan molecule through reaction, so that the mechanical strength and the chemical stability of the nanofiltration membrane are enhanced.

The invention discloses a fast combination locking-type scaffold system. The fast combination locking-type scaffold system is mainly composed of structural parts and partial accessories such as vertical rods, horizontal rods and inclined rods. The vertical rods are provided with a multi-hole connecting disk and a connecting locking and docking system so as to be assembled with the matching horizontal rods, the inclined rods, and the like into a construction structure which is stable in structure and can meet various load requirements; and the existence structures of the basic elements are interrelated and interdependent, all the structural parts adopt standard parts series, scale production can be achieved, and safety, reliability, efficiency and practicality are achieved really.

The invention discloses an architectural engineering construction on-site protective shed which is composed of a basic structure and a force unloading structure. The basic mechanism is composed of a steel structure bracket and a fixed protective layer to form a supporting frame and the most basic head top protection measure; the force unloading structure comprises a first movable plate, a second movable plate and springs which connect the first movable plate and the second movable plate with the fixed protective layer, and thus an energy absorbing structure is formed; in addition, the force unloading structure further comprises long strip holes and sliding rods which are formed / arranged on the lower portions of the first movable plate and the second movable plate; and the stroke of a falling object is enlarged in collision through sliding of the sliding rods along the long strip holes, so that mutual interaction force in collision is reduced. The beneficial effects of the architectural engineering construction on-site protective shed can be known according to detail description of the scheme, the structure is simple, the design is reasonable, when the falling object in the high place falls down, the force unloading structure can dissolve the impact force of the falling object, and the situation that impact force of the falling object penetrates through the top protection is avoided.

The invention provides a BCSLTM-SA composite microwave dielectric ceramic and a preparation method thereof. The BCSLTM-SA composite microwave dielectric ceramic is prepared from Ba1.2Ca0.4Sm3La1.26Ti8.99Mn0.01O26 and SmAlO3, wherein the mass percent of the SmAlO3 is 5 to 15 percent. Compared with the prior art, the BCSLTM-SA composite microwave dielectric ceramic provided by the invention is formed by compounding BCSLTM and SA in specific proportion. The BCSLTM-SA composite microwave dielectric ceramic comprises two crystal phase structures of Ba1.2Ca0.4Sm3La1.26Ti8.99Mn0.01O26 and SmAlO3; thestructure is stable; specific dielectric constant and high Q*f values are realized; meanwhile, the resonant frequency temperature coefficient is continuous and adjustable.

The invention relates to a preparation method of a thermostable and high-toughness ceramic glaze and belongs to the technical field of ceramic glaze preparation. The preparation method includes: usingaluminum nitrate nonahydrate crystals and ammonium bicarbonate as the raw materials to prepare a grinding product, using sodium silicate and ammonia water as the raw materials to prepare a calciningproduct, mixing the calcining product and the grinding product with other stone materials, crushing the mixture, subjecting the crushed mixture to high-temperature melting, coating a green body with the molten mixture, and naturally cooling to obtain the thermostable and high-toughness ceramic glaze. The preparation method has the advantages that specific surface area can be increased by preparingan aluminum oxide ceramic glaze into a nano material, nano aluminum oxide is evenly dispersed on the surface of a ceramic glaze interface and can increase the overall thermostability and mechanical performance of the ceramic glaze, a nano-silica material prepared by the sodium silicate is introduced into the ceramic glaze and can increase the toughness and thermostability of the ceramic glaze, and the prepared ceramic glaze is promising in application prospect.

The invention belongs to the technical field of building waterproof materials, and particularly relates to a super-strong chemical reaction type high-molecular self-adhesive rubber water-stop belt anda manufacturing method thereof. The super-strong chemical reaction type high-molecular self-adhesive rubber water-stop belt comprises a rubber base material and self-adhesive coated on the surface ofthe rubber base material; the rubber base material comprises diene rubber, an active agent, an anti-ageing agent, a reinforcing agent, operation oil, functional filler and a vulcanization system; thefunctional filler comprises montmorillonoid and / or hydrotalcite which is roasted for 20-80 minutes at a temperature of 450-600 DEG C; and the self-adhesive rubber comprises thermoplastic elastomer, softening oil, tackifying resin, an anti-oxidant, maleic anhydride grafted SEBS and N-hexadecyl propylidene diamine ammonium dichloride. The super-strong chemical reaction type high-molecular self-adhesive rubber water-stop belt provided by the invention has super-strong chemical reaction characteristics, can form excellent chemical bonding and adhering property with concrete, and bonding force isnot weakened as time is prolonged.

The invention discloses a probiotic composition as well as a preparation method and application thereof. The probiotic powder disclosed by the invention mainly comprises probiotics, prebiotics, dietary fibers, an embedding material, a protective agent and other auxiliary materials. All the components are synergistically compatible, so that the probiotic composition can keep high viable count for a long time, and the activity of the composition is kept. Furthermore, a probiotic product is prepared from four layers of packaging materials PET / NY / AL / CPP, so that the activity of the probiotics is kept stable. The preparation method of the probiotic product disclosed by the invention is an activity protection combination technology which is composed of a stable material mixing technology, a probiotic and prebiotic compounding technology, a moisture control technology, a microcapsule embedding technology, a packaging material control technology and other combination technologies. The activity of the probiotic powder can be ensured by controlling the adding sequence of the raw materials, process parameters and the like. Under the condition, the aging of viable bacteria is delayed, and the stability of the probiotic powder in the shelf life can be improved.

The invention discloses novel extruded and cooked instant noodles. The novel extruded and cooked instant noodles are made through the steps of performing decompressed dough mixing on wheat flour, mungbean powder, composite phophate and a Chinese yam extract in batch to make semi-finished dough products; and generating massive air holes in the processes of repeated low-temperature fermentation andnormal-temperature standing of the made semi-finished dough products to promote mixing of the Chinese yam extract with the flour, performing treatment through a secondary extruding and cooking technology, so that the instant noodles can obtain the best cooking degree, are good in toughness and are not liable to break, and maintain the mouth feel and the fresh and smooth degree of the noodles. Inaddition, in the cooking process, the noodles are not liable to bind, and are good in rehydration. The mung bean powder and the Chinese yam powder are added to the instant noodles, so that compared with the instant noodles made from single wheat flour, the instant noodles disclosed by the invention can conform to health pursuit, are nutritive and safe, and have delicate fragrance of mung beans. Besides, the defects that the soup of noodles is turbid, and the noodles are broken and poor in mouth feel when the noodles are made from coarse food grains and flour are overcome. The instant noodles are good in product quality, and are suitable for large-scale industrial production of coarse food grain instant noodles.

The invention provides an emulsion stabilizer containing bacterial cellulose. The emulsion stabilizer containing bacterial cellulose is prepared from the following ingredients in percentage by weight:9-21% of bacterial cellulose, 5-10% of soybean saccharine, 3-9% of anthrax gum, 6-12% of sodium carbohydrate cellulose, 7-21% of sucrose ester, 20-50% of glycerin monochromatic ester and 1-41% of extramarital. The invention also provides a cocoa milk beverage containing the emulsion stabilizer. The cocoa milk beverage contains the following ingredients in percentage by weight: 0.5-2.0% of alkalies medium fat cocoa, 2.0-8.0% of full cream milk powder, 3.0-10.0% of white sugar, 0.04% of calcium, 0.1-1% of an emulsion stabilizer, 0.01-0.05% of milk flavor, 0.03-0.1% of chocolate essence, and thebalance of water. The emulsion stabilizer is capable of not only effectively preventing cocoa and protein in the cocoa milk beverage from being precipitated, but also preventing calcium from being precipitated, preventing fat in the cocoa milk beverage from floating up, and further preventing precipitation caused by high-temperature sterilization.

The invention discloses a compound with electrochemical response to formaldehyde and a preparation method thereof. The cobalt complex electrocatalytic material is a 4,4'-dipyridine sulfadiazine cobalt compound with certain space structure, and the molecular formula is C40H34CoN12O4S2. The preparation method of the sulfadiazine cobalt compound electrocatalytic material is implemented by carrying out chemical reaction on sulfadiazine with conjugated extended pai bond and 4,4'-dipyridine to obtain the novel cobalt compound. The compound used as an electrocatalytic active material has accurate space structure and accurate molecular formula; the cobalt ions can form stable coordinate bonds with the ligand by utilizing 3d orbit, thereby being beneficial to the transfer of electrons and promoting the proceeding of the electrochemical reaction, and thus, the compound has favorable electrocatalytic activity for formaldehyde. The cobalt complex used as the electrocatalytic active material has wide application prospects.

The invention relates to a fudosteine oral liquid and a preparation method thereof. The fudosteine oral liquid comprises fudosteine, a metal ion compound, an acid-base regulator and a solvent, whereinthe fudosteine and metal ions form a chelate through chelation. The preparation method comprises the following steps: (1) mixing the metal ion compound with part of the solvent, and stirring until the metal ion compound is dissolved; (2) mixing the solution obtained in the step (1) with the fudosteine, stirring until the solution is dissolved, and adding the acid-base regulator to regulate the pHvalue of the solution; and (3) carrying out chelation reaction on the solution obtained in the step (2), cooling, and adding the solvent to the target quantity, thereby obtaining the fudosteine oralliquid. The oral liquid has the advantages of favorable stability and lower isomer impurity content, and solves the problem that the isomer impurity content in the fudosteine oral liquid increases quickly as the time goes on in the prior art.

The invention relates to the technical field of building engineering equipment, and discloses an assembled building truss structure which comprises a truss connecting rod. A fixed sleeve is arranged on the outer surface of the truss connecting rod, fixed clamping plates are fixedly arranged on the upper side and the lower side of the outer surface of the fixed sleeve, a mounting flange plate is arranged in the middle of the outer surface of the fixed sleeve and located between the two groups of fixed clamping plates, and a movable pressing sleeve is fixedly arranged on the outer surface of anadjusting screw rod through a nut. A movable pressing tongue is movably sleeved with the movable pressing sleeve, and one end of the movable pressing tongue is in contact with one end of the fixed sleeve. According to the assembled building truss structure, as for the arrangement of an auxiliary support, auxiliary straight rods can be conveniently and flexibly arranged in the whole building trussstructure, so that a stable and effective triangular structural unit is formed, the stability of the assembled building truss structure and the rigidity of the whole truss structure are improved, andthe safety and the stability of the assembled building truss are effectively improved.