438 results about "Disodium hydrogen phosphate" patented technology

The invention provides an antibacterial synergy-mineralization regulation difunctional nano material as well as a preparation method and application thereof, and belongs to the technical field of biomedical materials. The preparation method comprises the following steps: mixing a disodium hydrogen phosphate solution and a calcium chloride solution to obtain an amorphous calcium phosphate suspension; mixing the amorphous calcium phosphate suspension with a tannic acid solution to obtain an ACP-TA suspension; and finally, mixing the ACP (at) TA suspension and the hydroxypropyl trimethyl ammonium chloride chitosan solution to obtain the bifunctional nano material. A cross-linked shell is formed through the electrostatic adsorption effect of tannic acid and hydroxypropyl trimethyl ammonium chloride chitosan of the antibacterial layer, amorphous calcium phosphate is effectively wrapped, the crystallization process of amorphous calcium phosphate can be remarkably delayed, long-acting release of calcium and phosphorus ions is ensured, the antibacterial function can be effectively achieved, and the service life of the coating is prolonged. An ideal local microenvironment is provided for remineralization of tooth hard tissue, and finally biomimetic mineralization of enamel and deep mineralization plugging of dentinal tubules are achieved.

The invention belongs to the technical field of medicines, and particularly relates to a pyruvate-containing composite preparation as well as a preparation method and application thereof. The composite preparation containing pyruvate is prepared from the following components in percentage by mass: 0.02 to 0.04 percent of a compound A, 0.05 to 0.1 percent of pyruvate, 0.2 to 2 percent of sodium dihydrogen phosphate, 0.2 to 2 percent of disodium hydrogen phosphate, 0.7 to 0.9 percent of sodium chloride and the balance of water for injection, the structural formula of the compound A is as follows: # imgabs0 #. The compound A and pyruvate in the compound preparation interact with each other, so that lung inflammatory response can be inhibited, the level of inflammatory factors can be reduced, and lung edema can be relieved.

The invention provides a fermentation medium for efficiently producing lipopeptide by bacillus subtilis as well as application and a method of the fermentation medium. Each liter of the fermentation medium comprises 20-60g of a carbon source; 5-10 g of a nitrogen source; 1-5g of corn steep liquor dry powder; 1 to 5g of monopotassium phosphate; 1 to 5g of disodium hydrogen phosphate; 0.1 to 0.5 g of magnesium sulfate; 5 to 10 mg of calcium chloride; 5 to 10 mg of manganese sulfate; 5 to 10 mg of ferrous sulfate; and vegetable oil with a volume fraction of 1-5%. The carbon source is selected from at least one of glucose, maltodextrin and brown sugar; the nitrogen source is selected from at least one of diammonium hydrogen phosphate, sodium nitrate and urea; the vegetable oil is selected from at least one of soybean oil and corn oil. Bacillus subtilis with the volume fraction of 1-5% is inoculated into a fermentation culture medium for fermentation and fed-batch culture, and the yield of lipopeptide reaches 48.58 g / L. The method improves the lipopeptide production capability of the bacillus subtilis while eliminating foam, and is suitable for large-scale production and application.

The invention discloses collagen polypeptide firming and anti-wrinkle freeze-dried powder, and relates to the technical field of cosmetics. The invention relates to a biological preservative which is prepared from water, butanediol, a bacillus / soybean fermentation product extract, soluble collagen, acetyl hexapeptide-8, panthenol, 1, 2, 4-trimethyl-1, 3-pentanediol and a proper amount of water. The cosmetic is prepared from 1, 2-hexanediol, tetrahydromethylpyrimidine carboxylic acid, hydroxypropyl tetrahydropyrantriol, tremella polysaccharide, saccharide isomeride, a bifidus yeast fermentation product lysate, sodium hyaluronate, DNA sodium, a radix gentianae extract, mannitol, palmitoyl tripeptide-1, palmitoyl tetrapeptide-7, oligopeptide-1, decapeptide-4, oligopeptide-3, hydrolyzed royal jelly protein, folic acid and disodium hydrogen phosphate. The additive is composed of sodium dihydrogen phosphate, citric acid and sodium citrate. The mask can provide rich nutrients for skin, deeply care the skin, moisturize and relieve the skin, tighten the skin, resist wrinkles and make the skin moisturized, glossy, elastic and tight, and is high in use safety and wide in application prospect.

The invention discloses porous starch and a preparation method and application thereof, and the preparation method comprises the following steps: (1) starch pretreatment: taking corn starch as a raw material, fully mixing the corn starch with a calcium chloride solution, performing magnetic stirring for shelling and gelatinization treatment, after the shelling and gelatinization are stopped, centrifuging to take precipitate, washing and drying to obtain shelled starch; (2) enzymolysis treatment: preheating the shelled starch and a citric acid-disodium hydrogen phosphate buffer solution in a constant-temperature water bath to obtain a starch suspension; and adding a compound enzyme into the starch suspension for enzymolysis, centrifuging after enzymolysis is stopped, taking precipitate, drying, and crushing to obtain the porous starch. Compared with the prior art, the specific solution volume and oil absorption rate of the porous starch obtained by the method are obviously increased, and the dissolution rate of the porous starch in water is also obviously increased.

The invention provides a composition with an instant and long-acting anti-aging effect and application thereof. The composition comprises a component A, a component B and a component C, the mass ratio of the raw materials is (1-10): (1-4): (0.05-0.2); the component A is prepared from the following components in parts by weight: 0.01 to 0.5 part of acetyl octapeptide-3, 0.01 to 0.5 part of dipeptide diaminobutyryl benzyl amide diacetate, 0.001 to 0.2 part of arginine / lysine polypeptide, 0.3 to 1 part of caprylyl glycol and 96 to 100 parts of water; the component B is prepared from the following components in parts by weight: 0.001 to 0.2 part of soluble collagen, 5 to 30 parts of glycerol, 0.01 to 0.5 part of sodium dihydrogen phosphate, 0.001 to 0.2 part of disodium hydrogen phosphate and 65 to 100 parts of water; and the component C is tripeptide-29. According to the invention, the quadruple wrinkle fading polypeptide is adopted to block wrinkles in a multi-target full-link manner, so that the product has a very good effect of fading various wrinkles in real time.

The invention provides a formula of a sample eluent. The eluent comprises a surfactant, peptone with a concentration of 9 to 12 g / L, normal saline with a concentration of 7.2 to 9.6 g / L, tween-80 with a concentration of 0.8 to 1.2 g / L, disodium hydrogen phosphate with a concentration of 2.75 to 2.97 g / L and potassium dihydrogen phosphate with a concentration of 1.12 to 1.64 g / L. The eluent can effectively improve the sample recovery rate, and at least 90% of target substances can be successfully recovered after the eluent is treated by specific steps. In the use process, a dry and pollution-free sampling brush head needs to be completely immersed in the prepared eluent, then oscillation is carried out under set conditions to promote a target substance to be dissolved in the liquid, and finally the eluent is collected for subsequent analysis. The method is simple and convenient to operate, high in efficiency and very suitable for extracting and detecting various biological samples.

The invention discloses a method for preparing cement clinker by taking coal gangue as a raw material, and belongs to the field of solid waste recycling. The preparation method comprises the following steps: crushing coal gangue, transferring the crushed coal gangue into a ball-milling tank, adding perovskite manganese oxide nano powder, and carrying out ball-milling mixing, so as to obtain modified coal gangue powder after the ball-milling mixing is finished; and performing acoustic resonance mixing on the ground and dried limestone, manganese slag, copper slag, silica fume, disodium hydrogen phosphate and modified coal gangue powder, calcining after mixing, and cooling to obtain the cement clinker. The coal gangue is used for replacing part of raw materials, under the condition that the quality of the cement clinker is ensured, coal gangue solid waste can be properly treated, waste resources are recycled, organic matter, ash, lignin and other components in the coal gangue can provide part of heat energy, the use amount of fuel coal can be saved, energy consumption is remarkably reduced, and the cost is reduced. Therefore, the production cost of the clinker is reduced.

The utility model relates to a cooling crystallization device for producing disodium hydrogen phosphate, which is characterized in that stirring blades (13) are of arc-shaped structures, water storage cavities (14) are formed in the stirring blades (13), a water inlet channel (15) and a water outlet channel (16) are arranged in a rotating shaft (12), the water inlet channel (15) is communicated with the water storage cavity (14) of one stirring blade (13), the water outlet channel (16) is communicated with the water storage cavity (14) of the other stirring blade (13), and the water outlet channel (16) is communicated with the water storage cavity (14) of the other stirring blade (13). The water storage cavities (14) of the two stirring blades (13) are communicated with each other; the rotating shaft (12) drives the two stirring blades (13) to rotate so as to stir a disodium hydrogen phosphate solution in the container (10), meanwhile, water flowing in the water storage cavities (14) of the stirring blades (13) is used for uniformly cooling the disodium hydrogen phosphate solution, the solution cooling is accelerated, the cooling crystallization efficiency is improved, and meanwhile, the stirring blades (13) of an arc-shaped structure rotate at a low speed so as to reduce bubbles generated by the solution and improve the crystallization efficiency. The influence on crystallization is avoided.

The present invention relates to a colloidal gold card for detecting pesticide residues and a preparation method and application thereof. The colloidal gold card comprises a bottom plate and a sample pad, a gold binding pad, a nitrocellulose membrane and a water-absorbing pad which are sequentially overlapped on the bottom plate. The nitrocellulose membrane is provided with a detection line coated with a pesticide antigen and a quality control line coated with a secondary antibody. The gold binding pad contains colloidal gold-labeled pesticide antibodies, sucrose, disodium hydrogen phosphate dodecahydrate, bovine serum albumin, sodium caseinate, trehalose and polyethylene glycol. In the colloidal gold card, the gold binding pad contains sucrose, disodium hydrogen phosphate dodecahydrate, bovine serum albumin, sodium caseinate, trehalose and polyethylene glycol, which can effectively protect antigens and antibodies, eliminate the influence of tea polyphenols, flavonoids, pigments and minerals in tea on color development, and improve the anti-interference property of the colloidal gold card.

The invention relates to the technical field of hydrogel, in particular to composite hydrogel capable of stopping bleeding, resisting bacteria and promoting alveolar bone repair, a preparation method and application. The composition comprises a polyacrylic acid solution, a calcium chloride solution, a disodium hydrogen phosphate solution, platelet-rich plasma (including plasma, platelet lysis buffer, platelet-rich fibrin and fibrin of high-concentration concentrated growth factors) and nano clay (hectorite). The preparation method has the advantages of simple process, easily available raw materials, environment-friendly production process, safety and short preparation period. The composite hydrogel is good in biocompatibility and injectable, and can be widely applied to the field of biomedical materials.

The invention discloses fluticasone propionate emulsifiable paste and a preparation method thereof. The preparation method of the fluticasone propionate emulsifiable paste comprises the following steps: S1, mixing liquid paraffin, isopropyl myristate and other auxiliaries, and heating to obtain an oil phase; s2, purified water, propylene glycol, disodium hydrogen phosphate dodecahydrate and other auxiliaries are mixed to obtain a water phase; and S3, adding the oil phase into the water phase, adding fluticasone propionate and the like after complete emulsification, uniformly stirring, and standing to obtain the cream. Compared with the prior art, the fluticasone propionate emulsifiable paste prepared by the invention is not easy to layer at high and low temperatures, and the obtained emulsifiable paste has better stability and is very beneficial to transportation, storage and the like of the product.

The invention relates to the field of microorganisms, and particularly discloses a highly pathogenic gosling plague virus and a preparation method of an egg yolk antibody of the highly pathogenic gosling plague virus. The invention relates to a gosling plague virus, which is preserved in the China General Microbiological Culture Collection Center (CGMCC), is named as the gosling plague virus RD2311B-E21, is preserved on April 22, 2024, and has the preservation number of CGMCC NO.45964. The gosling plague virus is named as the gosling plague virus RD2311B-E21. The preparation method of the egg yolk antibody comprises the following steps: proliferating and inactivating gosling plague virus RD2311B-E21 to prepare an immunogen; respectively injecting the immunogen into the laying hens for four times to obtain four-immunized eggs; the preparation method comprises the following steps: soaking a tetra-immunized egg in a bromogeramine solution, performing spray fumigation with glutaraldehyde, then separating yolk, treating the yolk with disodium hydrogen phosphate to obtain a turbid solution, and performing acidification extraction, degreasing with octanoic acid, degerming filtration, virus removal by ultrafiltration, ultrafiltration concentration and subpackaging to obtain a finished product. The compound has the advantages of high purity, high titer and good treatment, prevention and control effects.

The invention discloses a grouting material suitable for rapid plugging of a water-rich stratum as well as a preparation method and application of the grouting material, and belongs to the technical field of grouting materials. The preparation raw materials comprise a component A and a component B, the component A comprises the following components in parts by mass: 20-80 parts of cement; 10-50 parts of a fly ash extract; 20 to 60 parts of water; the concrete admixture is prepared from the following components in parts by weight: 0.01 to 1 part of polycarboxylate superplasticizer, 0.025 to 0.05 part of polyacrylamide, 0.1 to 0.6 part of hydroxypropyl methyl cellulose, 0.5 to 1 part of disodium hydrogen phosphate and 1.5 to 4.5 parts of calcium metaaluminate. The component B is water glass, and the volume ratio of the component A to the component B is (1-5): 1. The grouting material provided by the invention has the properties of early strength, rapid setting, adjustable setting time, good fluidity, high flowing water retention rate and the like, and can meet the rapid plugging requirements of grouting of underground engineering such as tunnels, coal mines and the like.

The invention discloses a reconstituted tobacco preparation method based on a compound enzyme technology, which comprises the following steps: carrying out surface impurity removal pretreatment on a reconstituted tobacco sheet base to obtain a standby sheet base; dissolving cellulase and pectinase in water according to a certain mass ratio to prepare an enzyme solution; the preparation method comprises the following steps: spraying a citric acid-disodium hydrogen phosphate buffer solution to the surface of a standby film base, then spraying an enzyme solution to the surface of the standby film base, carrying out an enzymatic hydrolysis reaction for 3-5 h under the conditions that the temperature is 40-50 DEG C and the humidity is 50-70%, and then drying the enzymatic hydrolysis film base for 30-50 min at the temperature of 70-80 DEG C. According to the method, a collaborative regulation system of cellulase and pectinase is constructed, the enzymolysis process is optimized, oriented improvement of the sour and sweet taste of the reconstituted tobacco is achieved, the aroma richness is remarkably enhanced, the overall acceptability is greatly improved, the technical problems that in a traditional process, the flavor is single, and enzymolysis regulation is extensive are solved, and the quality of the reconstituted tobacco is improved. And a green and efficient standardized solution is provided for quality upgrading of the reconstituted tobacco.

The invention provides a production method of instant sodium pyrophosphate. The production method comprises the following steps: neutralizing, spray-drying, polymerizing, pre-hydrating, cooling and screening to obtain the instant sodium pyrophosphate. Food phosphoric acid and sodium carbonate are neutralized to obtain disodium hydrogen phosphate slurry, the pH is controlled to be 8.8-9.2, and the specific gravity is 1.4-1.5 g / ml; conveying the neutralized slurry to a pressure spray drying tower, and controlling the temperature of the tower bottom to be 120-150 DEG C; after drying, the mixture enters a dynamic polymerization furnace, the polymerization time is 30-40 min, the furnace tail temperature is 180-210 DEG C, and a sodium pyrophosphate semi-finished product is obtained. The semi-finished product passes through a cooling roller, water mist is sprayed at an inlet of the roller for pre-hydration, and meanwhile cooling is conducted; and sieving the product to obtain the instant sodium pyrophosphate.

The invention discloses a microbial odor remover suitable for environment and a preparation method thereof, and relates to the technical field of daily chemical products. The preparation method comprises the following steps: adding pediococcus acidilactici and bacillus velezensis into a citric acid-disodium hydrogen phosphate buffer solution according to a ratio, standing and activating, adding bromelain, lipase, rosmarinic acid nanoemulsion, tea polyphenol and citrus polyphenol-EDTA (Ethylene Diamine Tetraacetic Acid) mixture, homogenizing, adding konjac glucomannan-chitosan gel and a trehalose-glycerol compound according to a ratio, stirring, filtering, and drying to obtain a finished product. And subpackaging in a dark place to prepare the microbial odor remover suitable for the environment. Through the synergistic effect of microorganisms, enzymes and a natural deodorization medium, a multi-stage peculiar smell elimination system is constructed, the dual functions of immediate neutralization and continuous bacteriostasis are achieved, the application scene is wide, corrosion and residues to base materials such as fabric and plastic are avoided, and the concentration of harmful gas can be more effectively controlled and pathogenic microorganisms can be inhibited in large-scale breeding application.

The invention belongs to the field of polymer catalysis, and discloses a DMF (Dimethyl Formamide)-based heteropolyacid synergistic catalysis system as well as a preparation method and application thereof. The method comprises the following steps: adding sodium molybdate and disodium hydrogen phosphate into deionized water, adjusting the pH value to 2-3, then adding sodium metavanadate, heating and stirring at 95-100 DEG C, cooling at room temperature, and then adding diethyl ether and a sulfuric acid solution until an upper diethyl ether phase becomes light yellow from colorless; and drying the lowermost layer phase yellow oily substance, grinding and drying to obtain H5PMo10V2O40, and adding the H5PMo10V2O40 into a DMF (Dimethyl Formamide) solvent to prepare the DMF-based heteropolyacid synergistic catalysis system. According to the method, DMF is used as a solvent, the D-fructose is catalytically cracked in oxygen through a one-step method to be converted into DFF, gas does not need to be switched in the reaction process, and the prepared catalytic system is excellent in catalytic benefit, can be recycled, saves manpower and material resources in the catalytic process, is low in equipment requirement and can be suitable for reactions such as catalytic cracking of biomass.

The invention discloses a mixed alkali liquor carbon dioxide trapping agent and a trapping method thereof. The trapping agent comprises the following components in percentage by mass: 22-38% of main absorbent sodium carbonate, 1-10% of auxiliary absorbent A organic amine, 2-7% of auxiliary absorbent B sodium phosphate and / or disodium hydrogen phosphate and the balance of water. When the carbon dioxide is captured, the gas containing the carbon dioxide is in full contact with the mixed alkali liquid carbon dioxide capturing agent, the capturing agent absorbs the carbon dioxide to generate sodium bicarbonate precipitate, and the separated sodium bicarbonate solid is heated and desorbed at the temperature of 100-180 DEG C to obtain sodium carbonate, the carbon dioxide and water; and finally, returning the analyzed sodium carbonate to the mixed alkali liquor for recycling, and dehydrating, drying and purifying the mixed gas of carbon dioxide and water to obtain carbon dioxide. The trapping agent has the advantages of low cost, high carbon dioxide absorption capacity, high absorption rate, low regeneration energy consumption, safety and no toxicity; the sodium carbonate saturated solution is activated by using organic amine, so that the carbon dioxide absorption efficiency is improved; the separated sodium bicarbonate is heated and decomposed to obtain carbon dioxide, so that the working energy consumption is greatly reduced.

The invention relates to the technical field of microbial fertilizers, in particular to a low-cost compound microbial fertilizer and a preparation method thereof. The low-cost compound microbial fertilizer comprises the following raw materials in parts by mass: 20-40 parts of a fermented organic fertilizer, 10-20 parts of urea, 5-10 parts of ammonium magnesium phosphate, 5-15 parts of a potassium fertilizer, 1-4 parts of sodium humate, 1-4 parts of trehalose, 1-3 parts of gelatin, 0.1-1 part of a stabilizer, 7-19 parts of a mineralized microbial agent load and 1-3 parts of a coating solution, the mineralized microbial inoculum load comprises the following raw materials: 5-15 parts of bamboo charcoal powder, 1-3 parts of a composite microbial inoculum, 1-2 parts of calcium chloride and 1-2 parts of disodium hydrogen phosphate. The fertilizer has the advantages of obviously increasing the fertilizer utilization rate, improving the physical and chemical properties of soil, promoting the formation of granular structures and repairing hardened and ill-conditioned soil, has obvious soil repairing effect and obvious yield increasing, value increasing and quality improving effects, and is suggested to be suitable for large-scale popularization and application when being popularized and applied in production.

The invention discloses a concentrated buffer cleaning solution which mainly comprises the following raw materials: disodium hydrogen phosphate, sodium dihydrogen phosphate, Tween-20, propylene glycol, sodium chloride, trihydroxymethyl aminomethane (Tris) and pure water, and the pH value range of the concentrated buffer cleaning solution is 8.9-9.1. According to the invention, a unique lysis and buffer combination system is adopted, and various types of histological and cytological samples and the like can be compatible. A high (pH value) antigen buffer cleaning solution Buffer can be compatible with various histological and cytological sample types including fresh tissues or frozen cells, hydrothorax and ascites, tissue exudate and the like, and free nucleic acid and nucleic acid binding protein in various histological and cytological samples are rapidly and thoroughly separated under the synergistic effect of protease K; then, the separated free nucleic acid is efficiently combined with the antibody under the high-salt condition provided by the adsorption combination buffer solution, and denatured protein, lipid and other impurities are prevented from blocking a probe of a machine.

The invention relates to the technical field of pavement patching materials, in particular to a pavement patching material with high early strength and toughness and a preparation method thereof. The repairing material is formed by compounding phosphate-based powder A, magnesium oxide-based powder B, a composite retarder C and a fiber material D, the phosphate-based powder comprises phosphate and disodium hydrogen phosphate dodecahydrate; the magnesium oxide-based powder B comprises dead burned magnesium oxide, superfine powder, industrial solid waste powder, cellulose ether and wollastonite whiskers; the composite retarder C comprises borax and nitrite; the fiber material D comprises reinforced fibers. The preparation method is the preparation method of the pavement patching material. The pavement patching material slurry has high early strength, the construction time can be remarkably shortened, and it is guaranteed that a repaired pavement has excellent mechanical performance and durability; according to the preparation method, materials can be prepared respectively, and standardized production, transportation and storage are facilitated; only water needs to be added for preparation on a construction site, and construction is convenient.

The invention provides a novel mineral separation activating agent for sulphide ores and a preparation method of the novel mineral separation activating agent. The cleaning agent comprises 1-2 parts of basic cupric carbonate, 2-4 parts of ammonium chloride, 2-4 parts of nanometer jade powder, 2-3 parts of alginic acid, 1-2 parts of allyl glycidyl ether, 2-3 parts of peregal O, 2-3 parts of sodium di-sec-octyl maleate sulfonate, 2-3 parts of vinyl acetate, 4-7 parts of hydrogen peroxide, 4-6 parts of disodium hydrogen phosphate and 40-50 parts of water. The preparation method comprises the following steps: firstly mixing basic cupric carbonate and ammonium chloride to obtain a first mixture, then mixing the rest components, heating and stirring to obtain a second mixture, and finally uniformly mixing the first mixture and the second mixture. The activating agent overcomes the defects of a traditional activating agent, has efficient activating performance, can improve the beneficiation efficiency of low-grade, complex and refractory sulfide ore, is environmentally friendly, good in stability and high in adaptability, and provides technical support for efficient development of sulfide ore resources.

The invention discloses a polydeoxyribonucleotide solution for injection and a preparation method thereof, belongs to the field of passive implantation instruments of medical instruments, namely plastic and general surgery implants, and particularly relates to the polydeoxyribonucleotide solution for injection and the preparation method thereof. The poly-deoxyribonucleotide solution is prepared from sodium hyaluronate, poly-deoxyribonucleotide, mannitol, sodium dihydrogen phosphate, disodium hydrogen phosphate and water for injection, the sodium hyaluronate adopted by the invention is relatively large in molecular weight and can be used for filling superficial wrinkles of skin, and the poly-deoxyribonucleotide and the mannitol are supplemented, so that the skin wrinkles can be effectively removed, and the skin wrinkles can be effectively removed. On the basis of filling superficial wrinkles, the moisturizing, moisturizing and repairing effects are also achieved, and the skin state is improved. In addition, the preparation method of the polydeoxyribonucleotide solution is simple, large-scale production can be realized, and the application prospect is good.

The present invention belongs to the technical field of rapid detection of drug sensitivity for bacteria. Disclosed are an enrichment culture medium, and a preparation method therefor and the use thereof. The enrichment culture medium comprises the following raw materials in parts by mass: 15.0-20.0 parts of tryptone, 3.5-5.5 parts of peptone, 1.5-3.5 parts of glucose, 5.0-6.5 parts of yeast extract, 2.0-2.5 parts of dipotassium phosphate, 2.0-3.5 parts of disodium hydrogen phosphate, 1.0-1.5 parts of monopotassium phosphate, 2.5-7.5 parts of sodium chloride, 12.0-18.0 parts of proteose peptone, 15.0-22.0 parts of beef heart infusion powder, 8.0-12.0 parts of soya peptone, 1.0-5.0 parts of 0.1% nicotinamide adenine dinucleotide (NAD), 30-100 parts of newborn calf serum inactivated at 56°C for 30 min, 2.0-4.0 parts of mannitol, 3.0-5.0 parts of sodium pyruvate, 0.23-0.45 parts of cycloheximide, 0.8-2.0 parts of 0.05% bromothymol blue, 2.5-4.5 parts of 0.1% methylene blue, and 1000 parts of distilled water, with the pH value of 6.8-7.5. The enrichment culture medium is used to screen effective therapeutic drugs for bacterial diseases in poultry, and is convenient to use and has a single enrichment effect superior to that of respective selective enrichment broths of target bacteria. Therefore, the culture medium can realize rapid proliferation of common pathogenic bacteria in poultry.

The application provides a kind of shaped phase change material and its preparation method.The phase change material includes the following component materials according to mass percentage: 45.8-56.7% of dodecahydrate disodium hydrogen phosphate, 7.9-22.9% of sodium carbonate decahydrate, 7.6-15.9% of sodium sulfate decahydrate, 2.46-4.05% of reinforcing material, and 15-20% of adsorption material.The preparation of the phase change material includes the following steps: 1, preparing materials;2, preparing inorganic salt mixture;3, preparing molten inorganic salt mixture;4, preparing mixture and sealing;5, preparing shaped phase change material.The shaped phase change material prepared by the application has suitable phase change temperature, higher latent heat of phase change, no liquid leakage, no toxicity and non-combustibility, small supercooling degree, and no phase separation;at the same time, for the application occasions requiring transportation and storage between 20-30℃, the shaped phase change material can be used as an effective normal temperature cold storage agent to resist low temperature environment and protect specific chemicals and medicines from temperature fluctuation.

The invention relates to the technical field of feed additives, and particularly discloses a feed additive for large-scale feeding of mutton sheep, a pellet feed and a preparation method. The feed additive comprises a microcapsule core material and a wall material wrapping the microcapsule core material, and according to the total weight of the microcapsule core material, the microcapsule core material comprises 40-50 parts of soybean peptide, 30-40 parts of sodium alginate and 5-10 parts of calcium lactate; the wall material is prepared from the following components in parts by weight: 20 to 30 parts of chitosan, 10 to 15 parts of tannic acid, 10 to 15 parts of hydroxypropyl methyl cellulose, 5 to 8 parts of gelatin, 3 to 5 parts of disodium hydrogen phosphate and 2 to 3 parts of disodium ethylene diamine tetraacetate. The pellet feed comprises the following raw materials in parts by weight: 40-50 parts of corn, 15-25 parts of soybean meal, 10-20 parts of alfalfa meal, 5-10 parts of bran, 1-3 parts of a feed additive, 1-2 parts of calcium hydrogen phosphate and 0.2-0.8 part of table salt. The feed additive disclosed by the invention can be slowly released in rumens of mutton sheep and quickly released in intestinal tracts, so that the feeding effect is favorably improved.

The invention discloses a culture medium for producing tylosin through fermentation and a preparation method of the culture medium, and relates to the technical field of microbial fermentation. The culture medium comprises jerusalem artichoke powder, corn starch, sunflower seed cake meal, rapeseed meal, cottonseed cake meal, pea meal, sodium chloride, monopotassium phosphate, disodium hydrogen phosphate, ammonium nitrate and saccharides. According to the culture medium for producing the tylosin through fermentation, traditional fish meal is replaced with the vegetable protein, so that the content of histamine in the prepared tylosin is obviously reduced, all the components in the fermentation culture medium have a synergistic effect, the content of the prepared tylosin and the content of a component A in the tylosin are obviously increased, and the content of the component A in the tylosin is increased; wide application prospects are realized.

The invention discloses a preparation method of porous starch with a stable structure, which comprises the following steps: firstly, adding hydrophilic colloid into deionized water to prepare a solution, then adding starch, uniformly mixing to obtain a compound suspension, heating the compound suspension at a crystal melting starting temperature, and then carrying out vacuum freeze drying, grinding and sieving to obtain molten coated starch; the preparation method comprises the following steps: adding starch into a citric acid-disodium hydrogen phosphate buffer solution, uniformly mixing to obtain a starch-buffer solution suspension, adding an enzyme, carrying out an oscillating reaction, adjusting the reaction solution to be alkaline after the reaction is finished to terminate the reaction, then adjusting to be neutral, and finally centrifuging, washing, carrying out vacuum freeze drying, grinding and sieving to obtain the starch. The method is simple in process and low in manufacturing cost, the prepared porous starch has excellent adsorbability, structural stability and thermal stability, and the problems that in the prior art, the manufacturing process is complex, the preparation time is long, and the prepared porous starch is poor in structural stability, limited in pore-forming effect and the like are solved.

The invention belongs to the technical field of oral liquid, and provides DHA algae oil oral liquid and a preparation method thereof. The preparation method comprises the following steps: mixing sodium hexametaphosphate, disodium hydrogen phosphate, sodium caseinate, starch sodium octenylsuccinate and water, and refrigerating to obtain a water phase; mixing docosahexaenoic acid, caprylic capric triglyceride, essence and vitamin E oil to obtain an oil phase; adding the oil phase into the water phase, stirring at a high speed, and homogenizing the primary emulsion to obtain an embedded emulsion; and mixing the embedding emulsion, sucralose, sweet orange essence and water to obtain the DHA algae oil oral liquid. The DHA algal oil oral liquid forms a double-layer nano-emulsion structure, and the DHA algal oil nano-emulsion oral liquid with the double-layer structure has good thermal stability, freeze-thaw stability, salt, acid and alkali tolerance and long-term storage stability, and provides technical reference for development of DHA high-stability products and application of the DHA high-stability products in food processing.