355results about How to "Solving activity" patented technology

The invention relates to a carbon quantum dot, precious metal and zinc indium sulfide composite photocatalyst and a preparation method thereof. The composite photocatalyst contains a hexagonal-phase zinc indium sulfide (ZnIn2S4) matrix, and reduced carbon quantum dots and precious metal particles which are carried on the surface of the ZnIn2S4 matrix, wherein the ZnIn2S4 matrix is of a peony-flower-shaped structure, the particle size of the matrix is 0.1-10 micrometers and the BET specific surface area of the matrix is 10-200 m<2> / g; the particle size of the carbon quantum dots and the precious metal particles is 1-10 nm; precious metal refers to one or a mixture of some of gold, platinum, silver or palladium. The composite photocatalyst has high catalytic activity (with a hydrogen production rate up to 1mmol.h<-1>g<-1>) under irradiation of visible light (more than or equal to 400nm), and has long service life (over 50 hours).

The invention relates to a complex heavy-metal waste water emergency quick treatment method, comprising the following steps of: filtering by a sand filter; mixing by a high-speed pump; carrying out an ultraviolet catalyzing ozone reaction; carrying a microwave catalyzing active carbon reaction; carrying micro-electrolytic reaction; circulating waste water; carrying out a Fenton reaction; carryingout electric flocculation on an aluminum electrode plate; and pressing and filtering sludge. Waster water in a circulating slot is pumped into an iron carbon fluidized bed by a fluidizing pump to be circularly treated; an air compressor is connected with the iron carbon fluidized bed and prevents a filler in the iron carbon fluidized bed from blocking; and the microwave active carbon reactor is an active carbon filling tower, and a microwave emitter is arranged outside the body of the active carbon filling tower. The complex heavy-metal waste water emergency quick treatment method disclosed by the invention is used for treating the complex heavy-metal waste water, associated devices are simple, easy, quick, can meet an emergency, and can update and convert, no various chemical raw materials are fed, and various complex heavy-metal waste water with unknown elements can be quickly treated as long as the current magnitude is regulated, and thus the heavy metal in the waste water and chemical oxygen demand can immediately reach the standard and are discharged.

The invention discloses a nano-compound adsorbent for efficiently removing trace phosphorus, arsenic and antimony from a water body, belonging to the technical field of environment functional materials. The organic framework of the nano-compound adsorbent of the invention is hypercrosslinked styrene-divinylbenzene ion exchange resin, a functional group for surface binding of the organic framework is a quaternary ammonium group or pyridyl, nano-inorganic functional particles are loaded, and the total volume of 1-20nm nano-pores accounts for greater than or equal to 90% of the total volume of all the pores of the organic framework. The nano-inorganic functional particles are nano-hydrated ferric oxide or nano-hydrated manganese oxide. The nano-compound adsorbent of the invention has more obvious nano effect, strong reaction activity, great adsorption capacity and high selectivity, well solves the defects of obvious swelling, weak adsorption reaction activity, small adsorption capacity, lower adsorption selectivity and the like of the existing nano-compound adsorbent, and is more suitable for advanced treatment of micro-pollution of water and waste water.

The invention discloses a method for preparing a high-class concrete admixture with composite powder of steel slag and mineral slag and belongs to the fields of solid waste resource utilization and building materials. A novel crushing machine with a high-efficiency deironing function, a vertical mill with a high-efficiency circulation deironing function or a rolling mill with the high-efficiency circulation deironing function, and a tubular mill with the high-efficiency circulation deironing function are connected in three stages in series, so that the powder mill equipment can take the synergistic and real-time circulation deironing and low-energy-consumption low-cost superfine milling in the granulated blast-furnace slag and steel slag powder milling process are achieved. In the product, steel slag micro powder accounts for 20-50%, the mineral slag micro powder accounts for 35-65%, the flue gas desulfurization gypsum micro powder accounts for 5-15%, and the specific surface area of the product is 630-750m<2> / kg. Due to the synergetic stimulation effect of the granulated blast-furnace slag micro powder, the steel slag micro powder and the flue gas desulfurization gypsum, the ratio of the admixture in a concrete gel material can be up to 60-100%, and ordinary-strength and high-property concrete, high-strength and high-property concrete and super-high strength and high-property concrete with C40-C100 can be prepared. By adopting the method, the production of high-property concrete is greatly improved, the energy is saved, the emission is reduced, and the cost is lowered.

The invention provides a progressive repair method for soil polluted by chlorinated organic compounds. The repair method comprises the following steps: leaching the organic polluted soil by a water solution containing a bio-surfactant, and distributing most of persistent organic pollutants in the soil into a leaching solution; after finishing leaching, adding microbial degrading bacteria, and realizing the sustainable degradation of low-concentration organic compounds. The residual bio-surfactant cannot perform a negative function on the subsequent biodegradation of the organic pollutants, and can be used as a carbon source and be utilized by microorganisms. The bio-surfactant is used as a leaching agent, the organic pollutants are progressively degraded by a microorganism process, and the problems that the soil polluted by high-concentration chlorinated organic compounds is difficult to repair, traditional bio-surfactant produces residual toxicity, and the like are solved.

The invention discloses a technology for repairing surfacing of a piston rod of a super large marine diesel engine, and the technology can carry out the deep repair of the surface of the piston rod. The adopted surfacing process is as follows: flaw detection and straightening are carried out on the piston rod, turning machining is carried out on the surface of the piston rod to remove a defect layer, and individual deeper cracks are manually removed by grinding; fire whirl is used for heating the piston rod twice, the first heating is carried out till 200 DEG C-250 DEG C, the heating is stopped, the race rotation is carried out for 30 minutes, the second heating is further carried out after the temperature difference between the interior and the exterior is reduced, and a surfacing machine tool is rotated after reaching 250 DEG C-300 DEG C; submerged arc welding is used for rotating dual heads of the surfacing machine tool and a 2Cr13 flux-cored welding wire for carrying out the simultaneous surfacing, and asbestos cloth is used for wrapping and keeping the temperature during the welding process; the piston rod wrapped by the asbestos cloth for slow cooling after the surfacing achieves the size requirement, when the temperature is decreased to be lower than 100 DEG C, the piston rod wrapped by the asbestos cloth is vertically placed till the temperature is decreased to the room temperature, and then the temperature-keeping cloth is removed. The surface of the piston rod after the repair by employing the method has no weld defects, the piston rod fully meets the performance requirements, and the cost is only about one fifth of the cost for fabricating a new piston rod.

The invention discloses a preparation method of superfine low-sodium alpha-alumina powder with high activity. Industrial aluminum hydroxide is taken as a raw material; alkali is removed and adsorbed by adding an acid; a compound mineralizer is added to calcine; the superfine low-sodium alpha-alumina powder with high activity, of which the mean grain size D50 is 0.2-1.0micron, is obtained by combining dry ball milling with wet ball milling; the sodium content is 0.01%-0.05%; and the content of the alpha phase is 97%-99%. The problems that the alpha-alumina is high in sodium content, uneven in grain size, poor in sintering activity and the like are solved, special requirements of high-performance ceramic, grinding and polishing materials and the like are met, and the method has the advantages of being simple in process, environmentally friendly, low in cost and the like, and is suitable for large-scale production.

The present invention relates to film on the surface of medical titanium-base metal material and its sand blasting-micro arc oxidizing compounding process. Through the first surface sand blasting treatment of titanium or titanium alloy material and the subsequent micro arc oxidizing in electrolyte solution containing phosphate radical ion and calcium ion and with the titanium or titanium alloy material as anode, stainless steel or titanium as cathode and DC power source or DC pulse power source, one bioactive film is in-situ formed on the surface of the titanium or titanium alloy material. The bioactive film of rough porous hydroxyapatite has surface roughness Ra of 2-4.5 micron, no interface with the substrate, elastic modulus reaching that of bone and excellent bioactivity, and may be used as the substitute for femur, hip joint, tooth root, etc. The bioactive film has optimized combination strength, stability and bioactivity.

The invention provides a delaminated hydrotalcite nano-sheet based composite catalyst and a preparation method therefor. The preparation method for the catalyst comprises the steps of introducing cationic active ingredients into a hydrotalcite laminate to form a precursor with a layered structure, then, carrying out swelling to enable the laminate to be delaminated into 1 to 10 layers, carrying out compounding on obtained hydrotalcite nano-sheets and a support with a special surface structure or electron features, and carrying out washing and drying, thereby obtaining the M1M2-ELDH / S catalyst, wherein M1 represents a divalent metal cation for forming a hydrotalcite structure, M2 represents a trivalent metal cation for forming the hydrotalcite structure, ELDH represents a delaminated hydrotalcite nano-sheet, and S represents the support. The catalyst has the characteristics that the variety and ratio of the active ingredients are adjustable; after the laminate is delaminated into 1 to 10 layers, an active center is exposed to the maximum, and the stability and cycle use performance of the catalyst can be improved after the active center is compounded with the support; and the hydrotalcite laminate and the support with the special surface structure and the electron features generate an interaction, so that the activity and selectivity of the catalyst are further improved.

The invention discloses an acoustic flow measurement device and a method thereof. The acoustic flow measurement device is adopted between observation stations for sending sound waves to the opposite side simultaneously, then receiving sound waves transmitted by the opposite side, the bidirectional propagation time of the sound waves between the two observation stations is obtained by calculating; the difference and the sum of the acoustic signals bidirectional propagation time are used for reversing the mean velocity and the average temperature between observation stations. The invention can carry on the vertical sample based on sound propagation multi-path effect by only using a pair of sound-source-receiver; as the ocean interior images can be obtained by observing the external measurement of the sea; compared with the traditional method, the synchronous measurement with the large-scale and long time between two points by using a pair of instruments can be realized; the collection performance of the sound propagation can obtain ocean environment parameters with the vast scale in space and the average time which can not be obtained by the traditional point sensor; the method solves the problem that the observing is affected by shipping and fisheries activity.

The invention discloses a preparation method for a double metal cyanide catalyst for polycarbonate synthesis. The preparation method comprises the following steps of: firstly dissolving soluble metallic salt in organic ligand, and then adding deionized water to serve as a solution 1; dissolving water-soluble metallic cyanide salt in the deionized water to serve as a solution 2, wherein the volume ratio of the solution 1 to the solution 2 is 0.1: 1-5: 1; and then dripping the solution 2 to the solution 1 to obtain a solid catalyst after stirring and drying. In the invention, the influence of the deionized water to the synergic action between the organic ligand and the soluble metal salt is avoided; the synergic action between the organic ligand and the soluble metal salt in the DMC (Di Methyl Carbonate) catalyst is exerted at the greatest degree; and the reaction time when the catalyst catalyzes a copolymerization of propylene oxide and CO2 does not exceed 8h, the activity reaches to above 30Kg polymer / g catalyst, and the CO2 unit content in the polymer reaches up to 45.0%.

The invention provides a decentralized lotting / queuing method and system based on a block chain and a smart contract. The method comprises the following steps: constructing a lotting / queuing smart contract original book and deploying the original book on a block chain network; initiating a lotting / queuing activity by referring to the smart contract original book through DAPP by an activity initiator; carrying out registration certification on a smart contract copy through the DAPP by an activity participant; carrying out activity participation application operation through the DAPP and submitting relevant application information by the activity participant; automatically performing lotting / queuing operation by the smart contract copy for the particular activity; sending, by a smart contract copy block chain account, a 'target currency' to an account of the activity participant to whom an acquisition priority of an 'activity subject matter' should be given; and claiming, by the activityparticipant who owns the 'target currency', the right to acquire the activity subject matter from the event initiator. The method and the system provided by the invention can solve the problems thatthe information is not open and transparent, the chance of fraud is more, and the system is easy to be breached by hackers and the like in the existing centralized lotting / queuing system.

The invention relates to a process for preparing hydrogen by hydrocarbon gases, which cracks the hydrocarbon gas to hydrogen and carbon / catalyst composite material by means of catalysis. The hydrogen is the product, and solid products are used as fuel to provide energy for the cracking process. Burned residue is recycled and cycled to be catalyst in the process of preparing the hydrogen. In the process of preparing the hydrogen of the invention, besides, the hydrogen with high purity and without CO and CO2 can be obtained, the catalyst is not consumed due to the recycling use of the catalyst, and problems that the catalyst losing activity results in an unstable system and the like are not existed.

A method for controlling the rock desert zone by use of bryophyte and dendrobe includes such steps as collecting wild bryophyte, stretching to decrease its thickness to 1-2 mm, dividing it into squares (1-100 sq.mm), reproducing in hothouse for 1-2 months, culturing the dendrobe seedlings in hothouse, stretching the reproduced bryophyte to decrease its thickness to 1-2 mm, dividing it into squares (1-100 sq.mm), transplanting the bryophyte on the surface of bare rock, and transplanting the dendrobe seedlings in said bryophyte layer.

The present invention provides a method for preparing levulinic acid and co-producing gamma-valerolactone from biomass. The method comprises: mixing biomass and a gamma-valerolactone aqueous solution according to a weight ratio of the biomass to the gamma-valerolactone of 1:5-1:200, and dissolving the biomass under a heating condition; adding a solid acid catalyst to the filtrate to prepare levulinic acid; and adding a Ru, Ni or Pt base catalyst to prepare gamma-valerolactone. According to the present invention, after cellulose and hemicellulose in the biomass are dissolved in the gamma-valerolactone, the contact area with the solid acid is substantially increased so as to improve reaction efficiency and a product yield; the solid acid can be reused after recycling, such that waste acid emission can be avoided, cost can be reduced, and pollution on the environment can not be caused; the final product is the gamma-valerolactone so as to avoid separation of the product and the solvent; and difficult problems of low product yield, easy catalyst deactivation and low product separation cost due to existing of a large amounts of water during a levulinic acid and gamma-valerolactone preparation process using biomass in the prior art are solved.

The invention provides a direct-drinking ginger tea beverage. The beverage comprises the following materials by mass: 1 to 15 parts of ginger, 1 to 2 parts of red date, 1 to 2 parts of longan pulp, 0.5 to 1.5 parts of wolfberry, 7 to 10 parts of brown sugar, 0.5 to 0.8 part of honey, 0.1 to 1 part of vitamin C and 96 to 102 parts of water. A preparation method for the direct-drinking ginger tea beverage comprises the following steps: cleaning and pretreating the raw materials; subjecting ginger to wet ultrafine grinding; soaking red date without pit, longan pulp and wolfberry, carrying out extraction with hot water, then carrying out filtering and adding brown sugar; and adding honey and vitamin C after mixing of material liquid and carrying out dissolving, filtering, sterilization, canning and secondary sterilization to prepare the tasty beverage with health care functions like cold dispelling, dampness elimination, stomach strengthening, vomiting prevention, blood enriching and appetite promotion. The method employs wet ultrafine grinding technology and has the characteristics of rapidness, convenience, a low heat value during production, a fast dissolution speed of active components, a high recovery rate and high bioavailability.

The invention relates to liquid band-aid and a preparation technology thereof. The liquid band-aid is prepared from the following components in percentage by weight: 5%-20% of a film-forming agent, 4%-12% of a softening agent, 0.1-8% of an antibacterial agent, 3%-10% of a haemostatic and analgetic agent, 1%-5% of a healing agent, and 53%-83% of a solvent. The preparation technology comprises the following steps: adding 5%-20% of the film-forming agent and 53-83% of the solvent into a reactor, and soaking for 1-2 h; heating to 65 DEG C to 70 DEG C so that the film-forming agent completely swells; and sequentially adding the softening agent, the antibacterial agent, the haemostatic and analgetic agent and the healing agent into the reactor under stirring, and uniformly stirring to prepare the liquid band-aid. The liquid band-aid overcomes the defects that the traditional band-aid is not attractive, and the wound can not move freely. The liquid band-aid has the characteristics of being rapid in hemostatic effect, strong in inflammation diminishing and bacteria killing properties, and low in cost, and the wound part can move freely.

The invention provides a ready-to-use adjuvant of livestock vaccines, preparation and applications thereof, belonging to the field of the adjuvant of livestock vaccines. The ready-to-use adjuvant is prepared from the following substances: 5-30 percent of oil, 0.1-10 percent of hydrophilic surfactant, 0.1-10 percent of oleophilic surfactant, 0.1-10 percent of polymeric micelle substance and 40-90 percent of water. The invention also provides a preparation method of the ready-to-use adjuvant, and the method comprises the following steps: respectively weighing the substances, mixing and then emulsifying, and degerming to obtain the ready-to-use adjuvant of the livestock vaccines. The invention also provides an oil-in-water type vaccine with the ready-to-use adjuvant. The ready-to-use adjuvant is an oil-in-water type adjuvant and has the advantages of simple ingredients, stable dosage form, convenience in use and easiness in injection. The preparation method of the ready-to-use adjuvant has a simple process and is low in cost, and the obtained dosage form is stable. The oil-in-water type vaccine has the advantages of long stable period, easiness in storage, good immune effect, protection period prolonging, easiness in injection and small side reaction.

The invention relates to the technical field of removal of formaldehyde in urea-formaldehyde resin adhesives for artificial boards, particularly preparation and application of hyperbranched polyamide. The hyperbranched polyamide is synthesized by the following steps: carrying out reaction on butanedioic anhydride and diethylenetriamine used as raw materials to generate two AB2 monomers, and carrying out reaction on the two AB2 monomers under certain reaction conditions to obtain the hyperbranched polyamide. The hyperbranched polymer has multiple branches and multiple terminal amino groups, and thus, has multiple reaction active sites and can sufficiently react with formaldehyde. The hyperbranched polymer has low viscosity, has the three-dimensional structure, does not have intermolecular entanglement, and thus, can implement high utilization value after being added into the urea-formaldehyde resin adhesive. The hyperbranched polyamide is an environment-friendly formaldehyde catcher, thereby reducing the hazards to the human health and satisfying the requirements for national green material production.

The invention relates to the field of nano materials and discloses a preparation method of a water-soluble ferroferric oxide magnetic nanoparticle with functional amidogen, comprising the following steps of: coordinating carboxyl on n-(1,3-dioxoisoindolin-2-yl) alkyl acid (n is equal to 3-18) with ferrum; pyrolyzing a precursor of n-(1,3-dioxoisoindolin-2-yl) alkyl acid iron at high temperature to obtain an oil-soluble magnetic nanoparticle with lipophilicity and a surface ligand, i.e. the n-(1,3-dioxoisoindolin-2-yl) alkyl acid; then removing phthalic anhydride for protecting amino by a deammoniation protective reagent (hydrazine hydrate) by using a deammoniation protection method, and converting the oil-soluble magnetic nanoparticle into the water-soluble ferroferric oxide magnetic nanoparticle with functional amidogen. The water-soluble ferroferric oxide magnetic nanoparticle with functional amidogen can be excellently dissolved in a water solution and has favorable biocompatibility and paramagnetism.

The invention provides a condensation polymerization process for preparing hydroxylated acid condensation polymer, characterized in that hydroxylated acid or hydroxylated acid oligomer are subject to molten condensation polymerization reaction or molten / solid phase condensation polymerization reaction at the presence of ionic liquid catalytic action. The obtained hydroxylated acid condensation polymer contains no metallic elements.

The invention discloses a hydroxyapatite-based biological composite scaffold composed of hydroxyapatite, silk fibroin and chitosan, wherein a mass ratio of the components is represented by that: HA:SF:CS=(60-80):(10-20):(10-20). The composite scaffold is in a porous shape, wherein the porosity is 70 to 90%, and the pore size is 150 to 200mun. The pores are basically round, and are communicated with each other. The invention also discloses a tissue engineered bone constructed by using the hydroxyapatite-based biological composite scaffold. According to the invention, BMSCs transfected with VEGF gene is implanted into the hydroxyapatite-based biological composite scaffold, such that the tissue engineered bone is formed. According to the invention, hydroxyapatite, silk fibroin and chitosanare are adopted as raw materials, and a porogen-leaching technology is combined with a vacuum drying technology, such that the hydroxyapatite-based biological composite scaffold material is prepared. A degradation rate of the scaffold is regulated through the regulation of the proportions of the components. The pore size distribution of the composite material is controlled through the regulations of the radiuses and the addition amount of sodium chloride particles.

The invention discloses a composite gasoline desulfurizing agent loading heteropoly acid ionic liquid and application thereof and belongs to the technical field of oil processing. The composite gasoline desulfurizing agent is prepared loading heteropoly acid ionic liquid to MOFs (metal organic frameworks) by means of impregnation, wherein 10-50% by weight of the heteropoly acid ionic liquid is loaded in the MOFs; the MOFs used herein have the advantages such as structural stability, large specific surface area and pore diameter rule adjustability, and the problems of a conventional support such as low loading capacity, non-uniform distribution, proneness to catalyst loss, and proneness to active point poisoning; by introducing the heteropoly acid ionic liquid, it is possible to effectively catalyze oxidative sulfone-forming reaction of various thiophenic sulfides and it is possible to significantly improve desulfurization effect. In specific gasoline desulfurization, the composite gasoline desulfurizing agent has the advantages such as mild reaction conditions, good removal effect, low oil loss, zero significant effect on oil quality, and good reusability.

The embodiment of the invention discloses a method and equipment for activating and deactivating carrier waves, and relates to the field of wireless communication. The method and equipment are used for solving the problem of carrier wave activating or deactivating. The method comprises the steps that a terminal sends a request for updating a carrier wave state to a network side, and the carrier wave state is updated to carrier wave activation or carrier wave deactivation; after the network side receives the request, sent by the terminal, for updating the carrier wave state, whether the request for updating the carrier wave state is accepted or not is determined, and if the request for updating the carrier wave state is accepted, operation of carrier wave activation or carrier wave deactivation is executed according to the request. Therefore, according to the scheme, the network side can execute the operation of carrier wave activation or carrier wave deactivation according to the request sent by the terminal, an the problem of carrier wave activating or deactivating is solved.

The invention discloses self-repairing concrete taking a recycled coarse aggregate as a carrier and a preparation method of the self-repairing concrete. The self-repairing concrete comprises concreteingredients and a self-repairing recycled coarse aggregate, wherein the self-repairing recycled coarse aggregate accounts for 15-45% of the self-repairing concrete in percentage by volume. The self-repairing recycled coarse aggregate is prepared by impregnating a recycled coarse aggregate into a bacillus pasteuricus liquid, wherein the optical density (OD) value of the bacillus pasteuricus liquidis 1-1.2, and the volume mixing amount of the bacillus pasteuricus liquid is 30% based on cement in the concrete. According to the invention, the recycled coarse aggregate carrier is adopted, so thatthe problems of low mechanical strength of carriers, poor retention degree of microbial activity and inconvenient operation in the use processes of other carriers are solved, and the effects that construction wastes are recycled and structural performance of the microbial self-repairing concrete is good are also achieved.

The invention relates to an anti-micro pitting gear oil composite additive, which comprises the following components in percentage by weight: 5 to 10 percent of antioxygen, 30 to 50 percent of oleic acid modified nano borate, 20 to 30 percent of dispersant, 1 to 20 percent of emulsion breaker and the balance of base oil. The gear oil composite additive also comprises 0.03 to 0.1 weight percent ofanti-foaming agent. When 1.5 to 5 mass percent of the gear oil composite additive is added into the base oil at a proper viscosity, gear oil for wind power generator can be prepared. The gear oil forwind power generator does not contain thial extreme-pressure wear-resistance additive, has outstanding anti-micro pitting effect, and overcomes the drawbacks such as low anti-micro pitting performance of common gear oil. The gear oil composite additive is applicable to other kinds of industrial gear oil.

The invention discloses a lignin amine modified aqueous polyurethane material, a preparation method and an application. According to the invention, lignin is modified through a Mannich reaction, organic amine is grafted to a benzene ring structure of lignin, the solubility of lignin in water is increased, the chemical activity of the reaction of lignin and polyisocyanate is enhanced, compared with hydroxyl, the amino activity of the prepared lignin amine is large, the obtained lignin amine enables easy reaction with polyisocyanates, the mutual acting force of the lignin and aqueous polyurethane matrix can be increased, the compatibility is good, and the problems of small dissolvability and low chemical activity of the lignin can be effectively solved. The prepared lignin amine can be taken as a reinforcing agent in the aqueous polyurethane material for reinforcing the material, presents excellent aging resistance performance, and can be taken as a cheap age proof agent of the polyurethane material.

The invention discloses a method and a device for purifying VOCs (Volatile Organic Compounds) through gas-phase photolysis and liquid-phase photocatalytic oxidation. The method comprises the following steps: S1, gas-phase photolysis: irradiating the VOCs under an UV (Ultraviolet)-light condition, enabling the photolysis time to be less than 1s, generating ozone by reaction, and forming a mixed gas by the ozone and a residual gas after photolysis; S2, liquid-phase photocatalysis: carrying out reverse gas-liquid contact on the mixed gas obtained in S1 and catalyst slurry, enabling the mixed gas to fully react with the catalyst slurry, and enabling the mixed gas to be converted into CO2 and H2O. According to the method for purifying the VOCs through the gas-phase photolysis and the liquid-phase photocatalytic oxidation, disclosed by the invention, the gas-phase photolysis and the liquid-phase photocatalytic oxidation are effectively combined, and the two steps influence each other, work together and cannot be divided; the problems of catalyst deactivation and low liquid-phase absorption efficiency of the VOCs due to deposition of an intermediate product on a gas-solid catalytic surface are fundamentally solved; through a synergistic effect of multiple processes of high-energy ultraviolet photolysis, the liquid-phase photocatalysis, ozone catalytic oxidation and the like, the generation and the deposition of the intermediate product are reduced, and efficient and stable degradation of organic waste gas is realized.

The invention relates to placenta preserving fluid with pH value of 7.33-7.83; the placenta preserving fluid per 1,000ml contains 10-15mmol of potassium dihydrogen phosphate, 30-40mmol of sodium chloride, 40-50mmol of potassium chloride, 8-10mmol of magnesium sulfate, 70-100mmol of histidine, 1.5-2.0mmol of allopurinol, 3mmol of reduced glutathione, 1-8ml of 2-mercaptoethanol, 8-10mmol of adenosine, 1,000,00-1,000,000U of penicillin, 60-100mg of streptomycin and 50-70mg of gentamicin. The placenta preserving fluid can store the delivered placenta for a long time, prevent from reduction of cell activity and control the bacteria contamination rate of the placenta to be in a low level.

The invention discloses a preparation method of a forage bacillus subtilis powder. The preparation method comprises the following steps: first, the bacillus subtilis strain is inoculated on a slant culture medium to carry on slant culture, then the slant is flushed with a sterile physiological-saline, and a seed bacteria suspension is obtained; second, the seed-bacteria suspension is inoculated in a seed tank with the inoculation amount of 3% to 5%,by volume, to carry on fermentation culture, and a seed bacteria liquid is obtained; third, the seed bacteria liquid is inoculated into a fermentation cylinder to carry on the fermentation culture using a pressure difference method, and a fermentation broth is obtained; and fourth, bacteria sludge is obtained through bacteria-liquid separation of the fermentation broth, and the forage bacillus subtilis powder is obtained through spray drying of the bacteria sludge. Through the exploring of culture medium formulas and fermentation conditions, the problems that the bacteria powder prepared by conventional methods has low viable bacteria count and low spore transformation rate are well solved, the production efficiency is increased, and the cost of enterprises is reduced. The forage bacillus subtilis powder prepared through the method of the present invention has high viable bacteria count and high spore transformation rate.