2044 results about "Stabilizing Agents" patented technology

The invention provides an acetylacetone-based composite thermal stabilizer which is a mixture obtained by mixing zinc acetylacetonate, calcium acetylacetonate or magnesium acetylacetonate and hydrotalcite pro rata. The composite thermal stabilizer is suitable for chloride-containing high polymer, such as polyvinyl chloride, chlorinated polyethylene, chlorinated polyvinyl chloride, copolymer of vinyl chloride-ethylene or copolymer of vinyl chloride-vinyl acetate, has better thermal stability, prolongs the thermal aging time of the chloride-containing high polymer, and overcomes the shortcomings of poor long-term performance of single stabilizer of zinc acetylacetonate, poor transparency of stabilizer of calcium acetylacetonate, and poor initial colorability of stabilizer of hydrotalcite. The composite thermal stabilizer has low cost, good initial colorability, excellent long-term performance and good transparency, and is an efficient composite thermal stabilizer.

The invention relates to the technical field of concrete, and particularly discloses ultralow-density foam concrete and a preparation method thereof. The ultralow-density foam concrete is prepared from the following raw materials in parts by weight: 35 to 60 parts of cement, 15 to 25 parts of steel slag, 8 to 15 parts of lightweight aggregate, 1 to 3 parts of reinforced fiber, 0.5 to 1 part of a foaming agent, 0.1 to 0.3 part of a stabilizer, 0.3 to 0.5 part of a foaming aid and 30 to 70 parts of water, the foaming aid is at least one of aluminum powder, silica fume, calcium stearate and triethanolamine, and the foaming agent is one of an animal protein foaming agent and a rosin foaming agent; the foaming agent and the foaming aid are combined, a stable foam structure is formed in a concrete system, meanwhile, the phenomena of foam merging and foam breaking are reduced, formation of communicating holes is reduced while the foam hole structure is refined, the stability of foam concrete bubbles is improved, and foam collapse is reduced.

The invention discloses cheese ice cream capable of being frozen and preserved and a preparation method thereof, and the preparation method comprises the following steps: filtering raw milk, standardizing the milk, sterilizing, fermenting and removing whey to obtain cheese curd; placing the cheese curd in a steam engine for treatment to obtain a pretreated cheese material; preparing a mixed material from the pretreated cheese material, milk powder, cane sugar, glucose powder, malt syrup, a compound stabilizer, water, cream cheese, condensed milk, iced yolk and cream; and performing sterilization, ultrasonic homogenization and aging on the mixture, and performing freezing treatment under the condition that an alternating static magnetic field and an alternating electric field are alternated during stirring and air inflation, thereby obtaining the product. By adding the compound stabilizer, the cheese ice cream is more stable in structure and easy to maintain taste; ice crystals are fine and uniform in texture under the combined action of the alternating magnetic field and the electric field, so that the soft and glutinous feeling and aftertaste effect of the ice cream are improved.

The invention belongs to the technical field of dairy product processing, particularly relates to high-calcium milk containing colostrum basic protein, and further discloses a preparation method of the high-calcium milk. According to the high-calcium milk containing colostrum basic protein, milk serves as a main raw material, and milk mineral salt, a stabilizer, a thickening agent, nutrients, vitamin D, the colostrum basic protein and other raw material components are added. According to the high-calcium milk containing the colostrum basic protein, due to the proportion of the colostrum basic protein and the vitamin D, the nutritional value of the milk is effectively improved, calcium conversion and absorption can be promoted, calcium absorption by bones can be promoted, and the immunity of a human body is effectively improved.

The invention belongs to the technical field of functional Pickering emulsion preparation, and particularly discloses a silk fibroin nanoparticle-stabilized biphase drug-loaded Pickering emulsion and an antibacterial application thereof. The curcumin-loaded silk fibroin nanoparticles Cur-SFNPs with uniform form and size are prepared by using an anti-solvent precipitation method. In order to improve the antibacterial effect of the Pickering emulsion, the Cur-SFNPs is utilized to stabilize the soybean oil loaded with resveratrol, and the oil-in-water type Pickering emulsion is prepared. The Pickering emulsion prepared by taking Cur-SFNPs as a stabilizer has the characteristics of small particle size, uniform distribution, storage stability, heating stability, freeze-thaw stability, food safety and environmental friendliness. And as a two-phase drug-loaded emulsion, two natural hydrophobic active drugs are loaded at the same time, so that the solubility and bioavailability of the emulsion can be enhanced, the loaded active substances play a synergistic antibacterial and antioxidant role, and the emulsion can be applied to food preservation.

The invention provides an antifouling self-cleaning fluorocarbon finish paint as well as a preparation method and application thereof, and particularly relates to the technical field of special coatings. The antifouling self-cleaning fluorocarbon finish paint is composed of a component A and a component B in a ratio of (80-87): 16, the component A is prepared from the following components in parts by weight: 560 to 580 parts of fluorocarbon resin, 30 to 35 parts of a first solvent, 20 to 40 parts of a second solvent, 180 to 220 parts of titanium dioxide, 90 to 110 parts of filler, 11 to 20 parts of a light stabilizer, 3 to 5 parts of a thickening agent and 13 to 28 parts of an auxiliary agent; the component B comprises the following components in parts by weight: 20-22 parts of fluorocarbon resin, 4-5 parts of a chain extender, 15-20 parts of a diamine curing agent, 15-20 parts of a polyamine curing agent and 25-35 parts of a second solvent. According to the finishing paint, on the basis of enhancing the self-cleaning capability, the weather resistance of a coating is improved, and the aging and damage of the coating are delayed, so that the service life of the coating is prolonged.

The invention belongs to the technical field of food, and particularly relates to a high-satiety liquid protein composition as well as a preparation method and application thereof. The high-satiety liquid protein composition is characterized by being prepared from the following raw materials in parts by weight: 800 to 1000 parts of protein, 110 to 160 parts of vegetable oil, 700 to 800 parts of carbohydrate, 120 to 150 parts of dietary fiber, 5 to 15 parts of vitamin, 1 to 8 parts of mineral substance, 35 to 40 parts of emulsifier, 12 to 15 parts of stabilizer, 17 to 20 parts of pH regulator and 5 to 10 parts of essence. Under the comprehensive action of all the components, the liquid protein composition can keep the milk state stable, fat components are not subjected to lactation separation, protein components are not subjected to sedimentation and layering, the macroscopic state is stable, and nutrients in the product are uniformly distributed.

The invention relates to the technical field of fracturing fluids, and particularly discloses a high-performance water-based fracturing fluid and a preparation method thereof. A preparation method of a high-performance water-based fracturing fluid comprises the following steps: 1) dissolving a compound as shown in a formula I in a solvent, then adding a cyclodextrin derivative and hydroxyproline, mixing, then adding tetrabutylphosphorus hydroxide, and continuously and uniformly mixing to prepare a precursor solution; (2) adding a compound as shown in a formula II into the precursor solution, mixing, reacting, then adding maleimide or a maleimide derivative, heating to 60-70 DEG C, and continuously reacting for 2.5-4 hours to obtain a precursor; and 3) uniformly mixing water and guanidine gum to prepare a base solution, adding the cross-linking agent, the precursor, the clay stabilizer, the gel breaker, the bactericide and the pH regulator in a stirring state, and uniformly mixing to obtain the high-performance water-based fracturing fluid. The prepared high-performance water-based fracturing fluid has the advantages of thorough gel breaking and small solid-phase damage.

The invention provides essential oil containing ceramide and a preparation method of the essential oil. The essential oil containing ceramide is prepared from ceramide, mannosyl erythritol lipid, synthetic grease and natural vegetable grease. According to the ceramide-containing essential oil disclosed by the invention, complex components such as a surfactant and a stabilizer do not need to be added, and the added mannosyl erythritol lipid is natural sugar ester and has good biocompatibility and safety, so that the ceramide-containing essential oil disclosed by the invention is mild and non-irritant to skin and has excellent product safety; besides, according to the pure oil formulation formula, the purpose of improving the solubility and stability of ceramide can be achieved only by adding mannosyl erythritol lipid, the skin barrier maintaining effect of ceramide can be better played, the anti-inflammatory and skin repairing effects of ceramide are improved, and the skin health level is improved; the application range of ceramide in cosmetics is expanded.

The invention discloses a bamboo powder bio-based degradable material and a preparation method thereof, and belongs to the technical field of bio-based composite materials. The material comprises the following components in parts by weight: 35-65 parts of bamboo powder, 20-45 parts of poly (adipic acid) / butylene terephthalate, 5-15 parts of modified chitosan, 3-10 parts of a composite plasticizer, 2-8 parts of an inorganic filler, 0.5-3 parts of a composite antioxidant and 0.3-2 parts of a light stabilizer. The preparation method comprises the steps of material preparation, pretreatment, mixing, granulation, forming and the like, bamboo powder is subjected to compound modification through an alkali liquor-silane coupling agent, and sectional temperature control is adopted in mixing. The 180-day soil degradation rate of the material is greater than or equal to 60%, the tensile strength is greater than or equal to 18MPa, the problem that degradation and mechanical properties of an existing material are difficult to consider can be solved, and the material is suitable for the fields of packaging, tableware and the like.

The invention discloses a panax quinquefolius probiotic beverage and a preparation method thereof, and relates to the technical field of functional foods. According to the beverage, the combination of the American ginseng extract and specific probiotics is taken as a core, the survival rate of thalli is increased by adopting a microcapsule embedding technology, and the product performance is optimized by adding a stabilizer and a flavor regulator. The formula comprises 5-15% of a panax quinquefolius extract, 3-8% of compound probiotic freeze-dried powder (lactobacillus plantarum, lactobacillus salivarius and bifidobacterium lactis), 10-25% of inulin, 5-15% of whey protein, 10-30% of a microcapsule wall material (sodium alginate / chitosan or a WPI-KGM compound), and auxiliary materials. According to the preparation method, the active ingredients are efficiently reserved through the processes of gradient extraction, microcapsule embedding, low-temperature drying and the like. The product has the functions of resisting fatigue, regulating intestinal flora and enhancing immunity, the survival rate of probiotics in simulated gastric juice reaches 85% or above, and the shelf life stability is improved by 40%.

The invention discloses a liquid gutta-percha toughened and modified polyimide foam material and a preparation method thereof, and belongs to the technical field of high polymer materials. The gutta-percha adhesive is prepared from the following raw materials: liquid gutta-percha, a component A and isocyanate in a weight ratio of (5-40): 100: 58, the component A is prepared from the following raw materials in parts by weight: 40-45 parts of aromatic dianhydride, 5-10 parts of low molecular alcohol, 100-120 parts of a solvent, 8-10 parts of a foaming agent, 1-3 parts of a catalyst and 6-8 parts of a foam stabilizer. The liquid gutta-percha is added, so that the toughening of the polyimide foam material is realized, and meanwhile, the polyimide foam material keeps good heat resistance and mechanical properties. The method is suitable for preparing the polyimide foam material with high toughness.

The invention discloses a composition for improving the stability of oleuropein in a solution as well as a preparation method and application of the composition. The composition comprises oleuropein and at least one stabilizer, and the stabilizer is selected from the group consisting of anisic acid, lactobionic acid, glycyrrhizic acid, 3, 3-thiodipropionic acid, N-acetyl-L-glutamine, propyl-cysteine and lauramidopropyl betaine; and the pH value of the aqueous solution of the composition is 4.0-8.0. The preparation method comprises the following steps: dissolving oleuropein in water, adding the stabilizer, and uniformly mixing. Through simple physical mixing, by utilizing the synergistic effect of the specific stabilizer and the oleuropein, the degradation and discoloration of the oleuropein in the storage process are remarkably inhibited. Experiments show that after the preferable composition is preserved for 30 days in an open manner, the retention rate of the oleuropein still reaches up to 80% or above, and is far superior to that of blank control and a traditional liposome wrapping method. The composition is simple and convenient in preparation process and low in cost, and provides reliable technical support for wide application of oleuropein in liquid products such as food, medicine and cosmetics.

A two-in-one solid detergent composition includes the following raw material components based on 100% weight: 10% to 30% of (a) a forming agent, 10% to 50% of (b) a surfactant, 5% to 20% of (c) a softener, 10% to 30% of (d) a forming aid, and optionally 0.1% to 1% of (e) a softening conditioner, 0.1% to 1% of (f) a forming stabilizer, 1% to 10% of (g) a water softener, 1% to 10% of (h) a stain solubilizer or 0.1% to 5% of (i) a flavoring agent, and balance of deionized water.

The invention provides a preparation method of Al18F tracer integrated freeze-dried powder, a kit and application thereof, and the preparation method comprises the following steps: dissolving 1-10 mg of a precursor by using deionized water, adding a pH buffer solution with the concentration of 0.2-0.5 M and an AlCl3 solution with the concentration of 10 mM, with the ratio of the amount of substance of AlCl3 to the amount of substance of the precursor being 0.8-1.0, then continuously adding a stabilizer solution with the concentration of 0.5 M and 1-4 mg of an excipient, and uniformly stirring to obtain the Al18F tracer integrated freeze-dried powder. And finally, adding deionized water to enable the concentration of the precursor to be 0.5-1.0 mM, uniformly mixing the solution, sub-packaging the solution into 1.5 mL cryopreservation tubes or 2 mL penicillin bottles according to a certain volume, and then putting the cryopreservation tubes or the penicillin bottles into a vacuum freeze dryer to remove water at a low temperature to obtain powder or freeze-dried cakes, and the container is a freeze-dried powder / cake storage container and is used for storing the freeze-dried powder / cakes. Meanwhile, the reaction container is also used during radioactive labeling.

The invention discloses a preparation method of superfine calcium citrate suitable for liquid calcium, which comprises the following steps: S1, taking citric acid, citrate and calcium carbonate to react in water to obtain calcium citrate; the reaction temperature ranges from 80 DEG C to 90 DEG C, and the reaction time ranges from 10 min to 20 min; s2, performing vacuum freeze drying and primary crushing on the calcium citrate to obtain coarse powder; s3, absolute ethyl alcohol is added into the coarse powder and mixed evenly, low-temperature superfine grinding is carried out, the adding amount of the absolute ethyl alcohol is 8%-10% of the mass of the coarse powder, and the low-temperature superfine grinding temperature is 0-5 DEG C. On the basis of a normal calcium citrate preparation method, the calcium citrate is crushed and dispersed at a low temperature by using vacuum freeze drying, stabilizer adding and ice crystallization superfine grinding technologies, so that the structural stability of the calcium citrate is improved, and the problems of layering, thickening, solidification and the like are avoided when the calcium citrate is applied to liquid calcium.

The invention relates to the technical field of freeze-drying preparations, and discloses a preparation method of a controllable molecular weight silk fibroin composite freeze-drying filler, which comprises the following steps: preparing silk fibroin solutions with different molecular weights and a non-specific stabilizer into a composition liquid A, preparing microspheres, a microsphere dispersion liquid and purified water into a composition liquid B, and preparing the composition liquid B into the controllable molecular weight silk fibroin composite freeze-drying filler. Adding the composition liquid A into the composition liquid B, performing low-temperature swelling, performing uniform mixing, performing pre-cooling forming on the uniformly mixed freeze-drying composition liquid, and finally performing freeze-drying on the product by adopting a specific control program of a vacuum freeze-drying machine. According to the silk fibroin composite freeze-drying filling agent, the non-specific stabilizer, the microspheres and the microsphere dispersion carrier are adopted, so that the microspheres have good dispersity, and the silk fibroin composite freeze-drying filling agent is convenient to store, transport and use and has a relatively long period of validity.

The invention provides milky tea base milk and a preparation method thereof and fruity milky tea, the milky tea base milk comprises, by weight, 30-80 parts of a cow milk raw material, 0.1-3 parts of an emulsifier, 0.01-3 parts of a stabilizer, 0.2-3 parts of buffer salt and the balance of water, the cow milk raw material comprises raw cow milk or a mixed emulsion of raw cow milk and grease, and the emulsifier is an emulsifier. The emulsifier is selected from one or more of sodium stearoyl lactylate, diacetyl tartaric acid ester of mono (di) glycerides, fatty acid ester of mono (di) glycerides, polyoxyethylene (20) sorbitan monostearate and polyglycerol fatty acid ester, and the emulsifier further comprises sodium caseinate. The milk tea base milk starts from a milk product, free matching of the milk product and different acidic fruits is realized by constructing a stable system of the acidic milk beverage, the problem of flocculation and denaturation caused by matching of neutral milk and different acidic fruits is practically solved, and the obtained fruit tea is mellow in taste and has good flavor and quality, and the product is easy in raw material obtaining and low in cost. The process is simple and convenient and has the advantage of large-scale production.

The invention belongs to the technical field of drier preparation, and particularly relates to a dishwasher drier and a preparation method and application thereof. The dishwasher drier provided by the invention comprises fatty alcohol-polyoxyethylene ether, a fatty alcohol polyethylene / polypropylene ether copolymer, water-based fluorine-containing polyether siloxane, a polyacrylate modified polymer, sodium isooctanol sulfate, a chelating agent, a suspension stabilizer, a preservative and water. The stainless steel foam inhibitor is applied to an automatic dish-washing machine, and by introducing a modified silicone oil or fluorocarbon compound composite system, a combination of a high-molecular-weight polymer and a low-surface-tension regulator and a biocompatible defoaming agent, the drying performance of the stainless steel surface is remarkably improved, and the foam inhibition effect is optimized; foam generated by protein and an anionic surfactant is efficiently eliminated, meanwhile, environmental protection and sustainability are emphasized, and an efficient, clean and environment-friendly solution is brought to the automatic dish washing machine industry.

The invention provides a composite quality control liquid for an electrochemical multi-parameter detector. The composite quality control liquid comprises a buffer volume, a quality control substance and a stabilizer, the stabilizing agent comprises 5 to 50 g / L of bovine serum albumin, 0.1 to 10 g / L of EDTA-2Na (Ethylene Diamine Tetraacetic Acid), 10 to 100 g / L of a viscosity regulator, 0.3 to 25 g / L of a preservative and 5 to 20 g / L of a surfactant; the preparation method comprises the following steps: adding components of the stabilizer into a buffer system, preparing a preparation solution, preparing mother liquor of each quality control substance, proportionally mixing glucose mother liquor, uric acid mother liquor, beta-hydroxybutyric acid mother liquor and cholesterol sodium sulfate and triglyceride composite mother liquor according to the target concentration of the quality control solution, and fixing the volume by using the preparation solution to obtain the quality control liquid. And fully and uniformly mixing to obtain the composite quality control liquid. The composite quality control liquid can ensure that uric acid is not degraded, cholesterol triglyceride is not separated out, the formula is mild, and active substances in a detection system are not influenced.

The invention relates to the technical field of cream cheese preparation, in particular to whey-free natural fruity original cream cheese and a preparation method thereof.The whey-free natural fruity original cream cheese comprises a raw material bag, and the raw material bag comprises, by mass, 45-60 parts of single cream, 20-30 parts of concentrated milk, 20-30 parts of milk protein powder, 20-30 parts of table salt, 20-30 parts of a stabilizer and 20-30 parts of a composite leavening agent; the mass part of the concentrated milk is 35-50; 4-7 parts by mass of milk protein powder; the mass part of the table salt is 0.5-1.5 parts. The cream cheese with natural fruity flavor is prepared, high-index single cream and concentrated milk protein are used as raw materials, through a specific fermentation technology, pleasant fruity flavor can be generated without additional addition of flavor substances, and the flavor category of original cheese is enriched. And a semi-finished product can be obtained without discharging whey after fermentation, so that the process is simplified, the efficiency is improved, the problems of microbial risk and texture deterioration caused by addition of jam and secondary heat treatment in the traditional processed cheese are avoided, and the safety and quality of the product are remarkably improved.

The invention provides high-temperature-resistant, mute and long-life bearing lubricating grease and a preparation method of the high-temperature-resistant, mute and long-life bearing lubricating grease, and belongs to the technical field of lubricating materials. The composite additive comprises a special antioxidant, a special anti-wear reagent at extreme pressure, an anti-rust preservative, a microencapsulation self-repairing agent and a noise inhibitor, and a rare earth organic complex can be further introduced as a high-temperature stabilizer according to needs, so that multi-performance synergy is realized. The comprehensive adaptability of the lubricating grease under the high-temperature-resistant condition is remarkably improved, the service life of a bearing is prolonged, energy consumption and noise are reduced, and the lubricating grease has outstanding technical advancement and application and popularization value.

The invention discloses a ginseng and nattokinase composition and a preparation method thereof, belongs to the technical field of microbial fermentation, and provides the ginseng and nattokinase composition which comprises ginsenoside, ginseng peptide, acid-soluble protein, a stabilizer, an additive and a ginseng body. The preparation method comprises the following steps: S1, cleaning ginseng, crushing, cooking, cooling to 25-36 DEG C, and standing for 24 hours to obtain cooked ginseng; s2, adding an auxiliary agent and a stabilizer into the ginseng cooked in the step S1, then inoculating bacillus natto, and culturing for 24-36 hours at the temperature of 32-35 DEG C to obtain fermentation liquor; and S3, adding the auxiliary agent into the fermentation liquid in the step S2 again, uniformly mixing, culturing for 24-48 hours at the temperature of 36-40 DEG C, and then drying at low temperature to obtain the ginseng and nattokinase composition. The preparation method is simple and easy to popularize.

The invention provides moisturizing and anti-wrinkle cream and a preparation method thereof. The moisturizing and anti-wrinkle cream is prepared from the following raw materials in percentage by mass: 2%-10% of fibroin composite microsphere solution, 2%-5% of skin conditioner, 1%-2% of emollient, 8%-15% of humectant, 0.1%-1% of emulsifier, 1%-2% of emulsion stabilizer, 0.1%-0.2% of thickener and the balance of water. Wherein the fibroin composite microsphere is a spherical aggregate obtained by interpenetrating and entangling fibroin and poly-desoxyribonucleic acid in a cation environment and folding and compressing the fibroin and the poly-desoxyribonucleic acid; the composite microspheres can be percutaneously absorbed, and when the composite microspheres are applied to a formula of cream, the percutaneous permeation efficiency of the cream is greatly improved, and the moisturizing and anti-wrinkle effects of the cream are improved.

The invention provides a stabilizer for Pickering emulsion and application of the stabilizer, and relates to the technical field of Pickering emulsion preparation. The stabilizing agent for the Pickering emulsion is obtained by compounding 6 '-O-caffeoyl arbutin and cellulose nanocrystals. In specific application, the 6'-O-caffeoyl arbutin and the cellulose nanocrystals are prepared into a water phase, and then the water phase is mixed with an oil phase to prepare the Pickering emulsion. According to the preparation method, the defects in the prior art are overcome, the stability of the Pickering emulsion is effectively improved, meanwhile, the oxidation resistance effect of the Pickering emulsion is further enhanced, and the application value of the Pickering emulsion is improved.

The invention relates to a production process of environment-friendly gloves, which comprises the following steps: adding a cross-linking agent into butyronitrile latex in a stirring state, continuously stirring, sealing and standing, adding a potassium hydroxide aqueous solution and a foam stabilizer, stirring, adding a sulfur dispersion, an accelerant dispersion and a zinc oxide dispersion into a system, stirring, and when the viscosity of the system is reduced, adding a foaming agent, and stirring to obtain the environment-friendly gloves. Adding water; adding a carbon nanotube composite material, and when the viscosity of the system is increased, increasing the stirring speed and adding water; adding a thickening agent, increasing the stirring speed, adding a cross-linking agent, keeping stirring, increasing the stirring speed when the viscosity of the system is increased, adding a latex stabilizer, and continuing stirring; stopping stirring, sealing, standing, filtering, adding water, and stirring for foaming; the glove lining is subjected to mold covering, then gum dipping is conducted, drying, vulcanization and ripening are conducted after gum dipping, and the environment-friendly glove is obtained. In the preparation process, coagulant dipping and surface treatment are not carried out, so that the preparation process is green, environment-friendly and efficient.

The invention provides zero-fat low-sugar yoghourt and a preparation method thereof, the zero-fat low-sugar yoghourt comprises the following raw materials: skimmed milk, a fermentation inoculant, a sweetening agent and a protein product, the fat content of the skimmed milk is less than or equal to 0.3 g / 100mL, the protein content of the skimmed milk is greater than or equal to 6.0 g / 100mL, and the lactose content of the skimmed milk is less than or equal to 4.0 g / 100mL; the fermentation inoculant is composed of pichia kudriavzevii, lactobacillus helveticus and streptococcus thermophilus, and the ratio of the three strains is 2: 1: 5. According to the zero-fat low-sugar yoghourt disclosed by the invention, through selection of specific strains, good stability can be realized under the condition that a thickening agent and a stabilizing agent are not added, the product can be endowed with better oxidation resistance, human body metabolism improving efficacy and immunity regulating efficacy, and a green, clean and healthy yoghourt product is really obtained.

The invention discloses a preparation method of Chuzhou chrysanthemum water-soluble polysaccharide and application of the Chuzhou chrysanthemum water-soluble polysaccharide as a rice juice stabilizer, and belongs to the technical field of Chuzhou chrysanthemum polysaccharide extraction.The preparation method comprises the steps that firstly, Chuzhou chrysanthemum is soaked and pretreated with ethyl alcohol, then the ethyl alcohol is removed, and pretreated chrysanthemum filter residues are obtained; 2, the obtained pretreated chrysanthemum filter residues are subjected to water extraction, a sodium bicarbonate water solution serves as a water extraction system, and first-step treatment is conducted for 5-10 min under the dual-action conditions of 10-15 KHz ultrasonic treatment and 200-300 Mpa pressure; then carrying out intermittent 10-15 KHz ultrasonic treatment, and carrying out second-step treatment for at least 1 hour under the conditions that the air pressure is 50-60 kpa and the temperature is 80-86 DEG C, so as to obtain a water extraction filtrate; 3, mixing the obtained water extraction filtrate with ethanol, and precipitating, wherein the ethanol concentration in the mixed system is 35-50%; and 4, collecting the precipitate, dissolving the precipitate, dialyzing with running water, and freeze-drying to obtain the water-soluble polysaccharide of Chuzhou chrysanthemum. According to the method, the polysaccharide obtaining rate is increased.

The invention belongs to the field of leather making cleaning, and particularly relates to a leather bio-based degreasing agent and a preparation method thereof. The bio-based degreasing agent for leather comprises the following raw materials in percentage by weight: 18-22% of lipase, 38-42% of a bio-based surfactant, 0.1-0.2% of an enzyme activator, 1-3% of an enzyme stabilizer, 1-3% of a pH stabilizer and the balance of water. According to the leather bio-based degreasing agent disclosed by the invention, lipase and a bio-based surfactant (a metabolite with certain surface activity is secreted in a metabolic process when microorganisms are cultured under a certain condition) are organically combined, so that the lipase and the bio-based surfactant play a synergistic effect; and according to the detection result, the degreasing rate of the products obtained in the embodiments 1-3 is far higher than that of similar products sold in the market. In addition, the bio-based surfactant, lipase and other bio-based materials have great advantages in the aspects of carbon emission reduction, reproducibility and the like compared with a traditional petroleum-based surfactant, and popularization is more facilitated.

The present invention provides a azelastine hydrochloride nasal spray and a preparation method thereof, belonging to the technical field of nasal sprays. The azelastine hydrochloride nasal spray is composed of the following components by mass percentage: 0.1% of azelastine hydrochloride, 0.3 - 0.4% of a composite water extraction fermentation product of chamomile, houttuynia cordata, and peony flower, 0.005 - 0.01% of a stabilizer, 0.002 - 0.01% of a preservative, 0.95 - 1.05% of a thickening agent, 0.7 - 0.8% of a pH regulator, 0.45 - 0.48% of sodium chloride, and the balance of purified water; the composite water extraction fermentation product of chamomile, houttuynia cordata, and peony flower is prepared by first subjecting a mixture of chamomile, houttuynia cordata, and peony flower to water extraction to obtain a water extract and then subjecting it to composite enzyme fermentation. The composite enzyme includes cellulase, pectate lyase, and laccase. The present invention can effectively reduce the irritation to the eyes during use and ensure safer and more reassuring use.