86 results about "Oxidative activity" patented technology

The invention discloses a method for high-temperature aging promotion and active substance protection of pericarpium citri reticulatae, and belongs to the technical field of pericarpium citri reticulatae aging. The method comprises the following steps: putting a proper amount of dried tangerine peel to be aged into a self-polarized Nixing pottery container, then putting the container into a constant-temperature and constant-humidity box, and heating for 4-144 hours under the conditions that the relative humidity is 35-45% RH and the temperature is 40-80 DEG C, so as to obtain the aged tangerine peel. The method can effectively accelerate the Maillard reaction degree in the aging process of the dried orange peel, reduce the quality damage of the dried orange peel caused by high-temperature aging acceleration, shorten the aging time and improve the biological activity and medicinal value of the dried orange peel. Local overheating in the hot working process of the dried orange peel can be avoided, and the high-concentration air negative ion atmosphere generated by the self-polarization Nixing pottery container is beneficial to further improvement of the antioxidant activity of the dried orange peel; the limitation of dependence on long-time enzymatic browning in traditional dried orange peel production and the defect of loss of active substances caused by artificial high-temperature accelerated aging of dried orange peel are overcome.

The present application discloses a malt production method and a method for improving the antioxidant activity of malt, wherein grains are subjected to at least one steeping step, in which the grains are immersed in hydrogen water with a dissolved hydrogen concentration of 0.3 to 1.6 ppm. By using hydrogen rich water in malt production, it is possible to take into account simultaneous improvements to multiple quality indicators at the same time. The positive biological effects of hydrogen rich water are especially significant. The increased content of α-amino nitrogen in the malt brings greater economic benefit to malt producers. Moreover, the colour intensity and turbidity of the malt are significantly reduced, effectively solving the problem of wort often being turbid. The endogenous antioxidant activity of malt, wort and even fermented beverages is increased, as desired by malt producers and the brewing industry. No additional additives are introduced during malt production.

The invention discloses a preparation method and application of a chlorogenic acid carbon quantum dot microsphere capsule, a natural active product chlorogenic acid (CHA) in coffee is used as a raw material, and chlorogenic acid carbon quantum dots (CHA CDs) with anti-inflammatory and antioxidant activity are synthesized through a hydration method; then, the chlorogenic acid carbon quantum dots (CHACDs) are packaged with chitosan, and meanwhile, the chitosan on the outer layer of the capsule is modified with the DNA aptamer, so that the chlorogenic acid carbon quantum dot microsphere capsule Apt-CS (at) CHA CDs are obtained. The chlorogenic acid carbon quantum dot microsphere capsule disclosed by the invention not only has anti-inflammatory and antioxidant activity, but also can regulate intestinal flora, enhance intestinal barrier function and immune conditions; moreover, the microsphere capsule can be retained in the intestinal tract for a long time, so that the microsphere capsule can resist inflammation and remove high-level reactive oxygen species (ROS), can be retained in the intestinal tract for a long time and play a role in regulating intestinal flora, finally, the disease development of IBS is comprehensively relieved, and the microsphere capsule has a very good application prospect.

The invention discloses low-molecular-weight enteromorpha polysaccharide with antioxidant activity and a preparation method of the low-molecular-weight enteromorpha polysaccharide, and belongs to the technical field of polysaccharide preparation. The preparation method comprises the following steps: taking an enteromorpha crude polysaccharide solution, adding H2O2 to enable the concentration of the enteromorpha crude polysaccharide solution to be 0.04-0.08 M, and degrading for 90-120 minutes under ultraviolet rays to obtain the low-molecular-weight enteromorpha polysaccharide, the low-molecular-weight enteromorpha polysaccharide is composed of monosaccharides of rhamnose, glucose, galactose, xylose, mannose and arabinose according to the ratio of 1.08: 1.00: 0.83: 0.58: 0.69: 0.06, the scavenging capacity and the iron reducing capacity of DPPH, ABTS and hydroxyl free radicals are improved, and the low-molecular-weight enteromorpha polysaccharide is obtained. The compound has excellent antioxidant activity and can be used as or used for preparing an antioxidant active preparation. The preparation method disclosed by the invention is efficient and stable, can be used for preparing the low-molecular-weight enteromorpha polysaccharide with lighter color, lower molecular weight and higher antioxidant activity, and has higher potential application value.

The invention discloses a preparation method of a modified chitosan coating liquid for fruit preservation, which comprises the following steps: grafting gallic acid to chitosan by using a biological coupling method to obtain gallic acid modified chitosan; and dissolving anhydrous calcium chloride powder in the gallic acid modified chitosan to obtain the chitosan-gallic acid / Ca < 2 + > coating liquid material. The invention also discloses an application of the preservative in fruit preservation. The modified chitosan coating liquid prepared by the invention forms a high-density spatial network structure through a biological coupling method and a metal coordination reaction, and has good antibacterial and antioxidant activity, mechanical properties, water vapor barrier property and peel adhesion. The prepared modified chitosan coating liquid can form a uniform film on the surface of the fruit, weaken respiration, prevent and inhibit postharvest diseases, reduce the weight loss rate and rotting rate, maintain the brightness of the fruit and prolong the shelf life of the fruit.

The invention relates to the technical field of disinfectants, in particular to a production method of a low-corrosion chlorine dioxide disinfectant, which comprises the following steps: dropwise adding a sodium hydroxide solution, monitoring the pH value, adjusting the pH value to 8-10, maintaining stirring for 5 minutes, checking solubility and temperature, collecting precipitate particles, and filtering to remove the precipitate particles to obtain an alkaline mixed solution. According to the invention, the pH value is monitored and regulated to an alkaline interval to execute solubility inspection, so that the property control of the mixed solution is realized; on the basis of combined treatment of nanometer titanium dioxide photocatalysis and radio frequency discharge, the content of free radicals is multiplied, and the oxidation activity is improved; a silane coupling agent is combined to treat nano zirconium oxide and put into a system, the temperature is adjusted, the dispersion state is monitored, and the dispersion stability is guaranteed; the pH value and the oxidation-reduction potential are continuously monitored, foam separation and the chlorine content are controlled, and the quality of an intermediate solution is ensured; regulating and controlling the adding amount and the pH value of hydrochloric acid, monitoring gas escape, and screening out impurities to obtain a high-purity isolate.

The invention relates to the technical field of food packaging, and particularly discloses an antibacterial and antioxidant chitosan-based fruit fresh-keeping film and a preparation method thereof. The film comprises chitosan, glycyrrhizic acid, origanum essential oil, a plasticizer, a copper ion cross-linking agent, an acetic acid aqueous solution film-forming solvent, vesicle stable loading essential oil and a coordination cross-linking strengthening structure, and all the components construct a composite system through specific interaction. The preparation method comprises the following steps: firstly prefabricating glycyrrhizic acid-origanum vulgare essential oil vesicles, then adding vesicle powder and a plasticizer into a chitosan film-forming solution, uniformly mixing, casting and drying to form a primary film, and subsequently performing ionic crosslinking and balanced cutting to obtain a finished product. The film can be used for fresh-keeping packaging of fruits, has the advantages of being environmentally friendly, stable in structure and lasting in antibacterial and antioxidant activity, and can effectively delay reduction of the quality of the fruits; in addition, the preparation method disclosed by the invention is controllable in process, simple and convenient to operate, good in component synergism and beneficial to large-scale production and application.

The invention provides a gallium nitrate modified Prussian blue nano composite material as well as a preparation method and application thereof, and the gallium nitrate modified Prussian blue nano composite material comprises Prussian blue nano particles and gallium nitrate loaded on the Prussian blue nano particles, according to the preparation method, gallium ions are loaded on the Prussian blue nanoparticles in an ion replacement manner. Through the synergistic effect of Prussian blue and gallium ions, the synergistic effect of photothermal therapy and ion release is achieved, damage to normal tissue or cells is avoided, the sterilization effect can be improved, the concentration needed for antibiosis is low, and meanwhile the good biocompatibility, antioxidant activity and spectrum sterilization effect are achieved.

Compositions and methods for providing a person with an exogenous and therapeutically effective supply of short chain fatty acids, chlorogenic acid, and, optionally, ketones are disclosed. The compositions include one or more short chain fatty acids (such as butyric acid, butyrate salts, propionic acid, propionate salts, acetic acid, or acetate salts); chlorogenic acid; and, optionally, one or more beta-hydroxybutyrate salts. The compositions and methods are useful for inducing ketosis and / or beta-oxidative activity in a subject. In addition, compositions that include concentrated forms of, and methods of using, chlorogenic acid (alone or in combination with short chain fatty acids and ketones) to induce ketogenesis in a subject are disclosed.

The invention discloses a preparation method of an anti-aging body-building nutritional product. The preparation method comprises the following steps: step 1, weighing raw materials in parts by weight; 2, pretreating the tea polyphenol and the tea micromolecules; 3, mixing the pretreated tea polyphenol and tea micromolecules with other raw materials; step 4, adding maltodextrin and erythritol into the mixed solution, and stirring and mixing; and step 5, removing agglomerated particles, and tabletting or filling into capsules. According to the present invention, by adding the collagen peptide, the oxidation resistance of the product can be increased, the oxidative damage after exercise can be effectively relieved, the cell aging can be delayed, the traditional sucrose is cancelled, the maltodextrin and the erythritol are adopted to replace the sucrose, and the product is suitable for the long-term consumption of the body-building crowd; the preparation method solves the problems of easy oxidation and activity loss of core components in a traditional preparation method, so that substances such as tea polyphenols and tea micromolecules are more easily absorbed and utilized by human bodies.

The invention discloses recombinant saccharomyces cerevisiae, a 11-seed oil fermentation product as well as a preparation method and application of the 11-seed oil fermentation product, and belongs to the technical field of synthetic biology and fermentation product preparation. According to the recombinant saccharomyces cerevisiae disclosed by the invention, a caffeic acid coenzyme A ligase 4CL coding gene, a chalcone isomerase CHI coding gene, a flavanone-3-hydroxylase F3H coding gene and a chalcone synthase CHS mutant coding gene are over-expressed, and the chalcone synthase CHS mutant is preferably Y69H / H71Y / Q161K. The preparation method of the 11-seed oil fermentation product comprises the following steps: fermenting a recombinant saccharomyces cerevisiae fermentation solution in the presence of a sophora flower bud extract and caffeic acid to obtain a first fermentation solution; fermenting the lactic acid bacteria fermentation liquor in the presence of 11 seed oil to obtain second fermentation liquor; and mixing the first fermentation liquid and the second fermentation liquid, continuing fermentation, and respectively collecting an oil phase and a water phase after fermentation is finished, so as to obtain a fermentation product. The product provided by the invention has multivitamin antioxidant activity.

The invention discloses a small molecule peptide with antioxidant activity as well as a preparation method and application of the small molecule peptide. According to the technical scheme, the method comprises the following steps: 1) carrying out enzymolysis on squid viscera by adopting neutral protease (4000U / g, pH 7.0, 50 DEG C and 8 hours), carrying out freeze drying, and identifying peptide fragments through MALDI-TOF mass spectrometry; 2) binding molecular docking (AutoDock Vina screening binding energy lt; the method comprises the following steps of: screening out two small molecular peptides YVPGKFRQTN and GLPQTMEVYLR with antioxidant activity (-8.0 kcal / mol) and molecular dynamics simulation verification, namely YVPGKFRQTN and GLPQTMEVYLR with antioxidant activity; and 3) experimental verification shows that the DPPH free radical scavenging rates of the two are respectively 89.4% and 83.1% when the concentration of the two is 2.5 mg / mL, and oxidative stress is remarkably inhibited by up-regulating an Nrf2 pathway (protein expression is 3.0-3.5 times, and HO-1 / SOD1 gene expression is 3.6-4.1 times). The obtained antioxidant activity small molecule peptide can be applied to development of functional food, cosmetics and anti-aging drugs, and a new way is provided for high-value utilization of squid byproducts.

The invention belongs to the technical field of development of anti-inflammatory and antioxidant drugs, and discloses a gallic acid derivative as well as a preparation method and application thereof. The gallic acid derivative is a compound with a structure as shown in a formula 2 or a pharmaceutically acceptable salt or solvent compound thereof. The gallic acid derivative belongs to novel compounds, the compounds are designed and successfully synthesized for the first time, and meanwhile, the structures of the compounds are represented; the preparation method of the gallic acid derivative is simple and convenient to operate, and the compounds can be rapidly synthesized; research finds that the gallic acid derivative has good anti-inflammatory and antioxidant activity, and shows good application prospects in treatment of inflammation and oxidative stress. # imgabs0 #

The invention belongs to the technical field of food packaging materials, and particularly relates to a Co-MOF (at) CEO intelligent active packaging film and a preparation method and application thereof. Cinnamon essential oil is embedded in a cobalt-based metal organic framework to form composite nanoparticles with antibacterial and ammonia-sensitive functions, then the composite nanoparticles and potato starch are mixed, a film is formed through a solution casting method, and the intelligent active packaging film is obtained. According to the preparation method of the intelligent active packaging film provided by the invention, the water solubility of the potato starch packaging film is reduced, the prepared intelligent active packaging film has good antibacterial, antioxidant activity, mechanical and barrier properties and good sensitivity to ammonia, the freshness of meat can be monitored in real time only through the color change of the packaging film, and the method is suitable for large-scale popularization and application. The fresh-keeping and freshness visual monitoring of food such as fish meat and the like can be realized at the same time, and the method has a good application prospect in the field of intelligent active packaging.

The invention discloses an antioxidant composition based on pH response type microcapsules as well as a preparation method and application of the antioxidant composition. Wherein the antioxidant composition contains ferulic acid, L-ascorbic acid-2-glucoside and tocopheryl acetate, and the mass ratio of the ferulic acid to the L-ascorbic acid-2-glucoside to the tocopheryl acetate is 1 to (3 to 5) to (5 to 10). A composition of ferulic acid, L-ascorbic acid-2-glucoside and tocopheryl acetate in a specific ratio is used as a core material, and a chitosan-sodium alginate compound is used as a wall material. The microcapsule can effectively protect the stability of antioxidant active ingredients in the storage period, and can specifically respond to a weak acidic pH environment of skin to release active matters so as to realize intelligent delivery. Components of the core material have a synergistic anti-oxidation effect, so that the final effect of the product is remarkably improved. The cosmetic composition containing the microcapsules has the advantages of being high in stability, remarkable in effect, good in skin feeling and the like.

The invention belongs to the technical field of microbial fermentation, and particularly relates to rhodotorula mucilaginosa JQRM001 and application thereof. The invention provides a rhodotorula mucilaginosa JQRM001, the Latin name of the rhodotorula mucilaginosa JQRM001 is Rhodotorula mucilaginosa, the rhodotorula mucilaginosa JQRM001 is preserved in China General Microbiological Culture Collection Center, the address is No.3, Yard 1, Beichen West Road, Chaoyang District, Beijing, the preservation date is July 15, 2025, and the preservation number is CGMCC No.35240. The invention further provides a preparation method of the rhodotorula mucilaginosa. The rhodotorula mucilaginosa JQRM001 not only has excellent performance of high temperature resistance and acid resistance, but also can be used for specifically synthesizing alkylpyrazine flavor substances and remarkably improving the antioxidant activity of plant polysaccharides.

This invention provides viscose macrobiofibers containing antioxidant active components and a method for preparing them. [Solution] The viscose macrobio fiber prepared by reacting raw materials by weight of 20-24 parts COFs carrier, 5-8 parts plant-derived antioxidant active component, 200-240 parts spinning solution, 2-4 parts sodium dodecyl sulfate, 2-4 parts glyceryl monooleate, 3-5 parts cyclodextrin, 2-4 parts titanium dioxide, and 3-5 parts silane coupling agent, has the antioxidant active component attached to the COFs carrier during the preparation process. In the prepared viscose macrobio fiber, the COFs carrier functions as the backbone of the viscose macrobio fiber, and the ends of the COFs carrier are exposed to or close to the surface of the viscose macrobio fiber. The antioxidant active component on the COFs carrier is easily transferred to the surface of the fiber, and the viscose macrobio fiber has a good antioxidant effect.

This invention relates to the fields of environmental pollution remediation and biocatalysis, and provides a method for preparing a self-supplied H2O2 cathode material via an electroenzyme cascade and its application. The cathode material is an ionic liquid-modified CPO-IL. EMB The bio-hybrid material formed by immobilizing molybdenum disulfide-modified MoS2@Co-CNNT composite material, namely CPO-IL EMB / MoS2@Co-CNNT. An electroenzyme cascade degradation system was constructed using this biohybrid material as the cathode. By controlling the electrode potential, controllable H2O2 generation was achieved while protecting the Fe(III) in the iron porphyrin ring of CPO from reduction, thus maintaining the intrinsic oxidative activity of the enzyme. The in-situ generated H2O2 activates CPO-IL. EMB It efficiently catalyzes the oxidative degradation of mesotrione. This invention requires no external CPO-IL. EMB It is green and environmentally friendly, with high degradation efficiency, and has promising applications in agricultural wastewater treatment and environmental remediation.

The invention relates to the technical field of silage, and provides a pennisetum hydridum silage additive which comprises the following raw materials in percentage by mass: 10-15% of table salt, 40-70% of a microbial fermentation agent, 5-10% of an enzyme preparation, 10-15% of antioxidant active lactic acid bacteria and 5-10% of a degradation agent. The bacillus licheniformis disclosed by the invention can secrete lichenin, can quickly consume free oxygen in the environment in an aerobic state to generate a strong biological oxygen abstracting effect, and is matched with the bacillus subtilis to quickly create an anaerobic environment and promote the growth of anaerobic bacteria and lactic acid bacteria, and meanwhile, enzymes are generated to decompose cellulose, so that the content of fibrous substances is reduced.

The application relates to a method for inactivating viruses in sewage. The method comprises the following steps: introducing heterotrophic bacteria into sewage to be inactivated; increasing the carbon-nitrogen ratio of the sewage during the activation and expansion of the heterotrophic bacteria; washing and resuspending the activated and expanded heterotrophic bacteria to form a heterotrophic bacteria liquid to be used; inoculating the heterotrophic bacteria liquid into the sewage and reducing the carbon-nitrogen ratio of the sewage, so that the heterotrophic bacteria produce an oxidative stress response to inactivate viruses. The method adjusts the carbon-nitrogen ratio to make the heterotrophic bacteria change from an eutrophic environment to an oligotrophic environment, activates the oxidative stress pathway of the heterotrophic bacteria, increases the generation of oxidative active species such as superoxide free radicals, causes oxidative damage to the virus shell or envelope, and thus promotes the inactivation of viruses. The method is simple and efficient, and has a wide application scenario.

The invention belongs to the technical field of bioactive peptide preparation, and discloses a preparation method of a tylorrhynchus antioxidant peptide, which comprises the following steps: mixing tylorrhynchus homogenate with enzyme, and carrying out enzymolysis to obtain the tylorrhynchus antioxidant peptide, the enzyme comprises flavourzyme and pancreatin. The invention provides the preparation method of the tylorrhynchus antioxidant peptide which is high in antioxidant activity and suitable for industrial mass production, the protein hydrolysis degree is improved, and the oxidation resistance of the tylorrhynchus antioxidant peptide is improved. The method can effectively solve the problems of low efficiency, high cost and inapplicability to large-scale extraction and preparation of the tylorrhynchus antioxidative peptide in the existing polypeptide extraction process.

An induction medium and induction culture method for lavender suspension cells having high antioxidant activity. Suspension cells having a high ABTS free radical scavenging rate can be cultured by optimizing the formulation of a medium, and the contents of total phenols, total flavonoids and total triterpenoids are relatively high. Additionally, lavender suspension cells induced by using the medium grow rapidly and have a stable system, and extracts thereof can significantly reduce redundant ROS generated by oxidative stress of HaCaT cells, exhibit good biological antioxidant activity, and provide a reference for the development of lavender secondary metabolite resources and the like.

The present invention relates to a dual-support catalyst for tobacco industry organic waste gas treatment, a preparation method and use thereof, the catalyst comprising (a) 0.5-5 wt% of a supported active component Pt / α-Fe2O3 (loading amount of Pt is 0.1-5 wt%), (b) 0.5-5 wt% of a catalytic aid MoO3, (c) 1-10 wt% of a molding aid SiO2, (d) 1-10 wt% of a molding aid Al2O3, and (e) 70-97 wt% of a composite oxide carrier Zr x Ti (1‑x) Co 1.5 O4 (x is 0.15-0.25). The dual-support catalyst of the present invention has excellent catalytic oxidation activity on volatile organic compounds (VOC) in tobacco industry organic waste gas, and has persistent catalytic oxidation activity due to the anti-sulfur and anti-chlorine poisoning performance. In addition, the catalyst of the present invention can be molded into a desired shape and has excellent compressive strength, meeting the deep purification needs of VOC in tobacco industry organic waste gas.

The invention discloses a method for improving the malic acid-lactic acid fermentation performance of Oenococcus oeni SD-2a in red wine, and belongs to the technical field of wine brewing. According to the method disclosed by the invention, after an alcoholic fermentation stage of the red wine is finished, filtration and sterilization are carried out, proline and Oenococcus oeni SD-2a are added, and then malic acid-lactic acid fermentation is carried out. The invention finds that the stress effect of high-concentration alcohol on Oenococcus oeni SD-2a can be reduced by adding proline in the malic acid-lactic acid fermentation stage after the alcoholic fermentation stage in the wine is ended; the fermentation effect is promoted, so that the aroma complexity of the wine is improved; the antioxidant activity of the grape wine is improved by the proline; phenolic compounds in the wine are protected, and finally the quality of the wine is remarkably improved.

A method of treating systemic lupus erythematosus in a subject is provided in which a therapeutically effective amount of PIC1 is administered to the subject. A method of treating transfusion-related acute lung injury is also provided where a therapeutically effective amount of PIC1 is administered to the subject. PIC1 can modulate immune complex activation of the complement system and NET formation in the subject. PIC1 can also inhibit myeloperoxidase (MPO) activity in the subject.

The application discloses a method for brewing semi-solid state Luzhou-flavor liquor with antioxidant activity, which comprises the following steps: adding high-gluten corn bran obtained by regulating the milling and steaming procedure into low-gluten corn, and adding composite reinforcing strains to the corn, so as to brew Luzhou-flavor liquor with good antioxidant activity and improved flavor quality. The composite reinforcing strains are composed of Saccharomycopsis fibuligera and Bacillus subtilis. The method for brewing Luzhou-flavor liquor with high antioxidant activity comprises the following steps: adding high-gluten corn bran obtained by the specific milling and steaming procedure into low-gluten corn, and adding composite reinforcing strains with specific amount and proportion to semi-solid state fermentation with specific Luzhou-flavor Daqu, so as to obtain liquor with antioxidant activity of more than 80% and meeting the national standard of semi-solid state Luzhou-flavor liquor.

The present invention belongs to the field of water environment restoration materials, and discloses a method for preparing a slow-release / temperature-controlled ferrate-silicon dioxide core-shell material and its effect of removing antibiotics. The method mainly includes: using an in-situ growth coating synthesis method, based on a silica material with excellent biocompatibility, large specific surface area and pore volume and easy surface modification, combined with potassium ferrate with strong oxidizing properties, to prepare a slow-release ferrate-silicon dioxide core-shell material; further, by loading a phase change material on a slow-release ferrate iron-silicon dioxide core-shell material, a slow-release and temperature-controlled composite material is prepared, and efficient utilization and precise release of oxidative active substances are achieved. The present invention realizes the slow-release efficient utilization and temperature-controlled precise release of oxidative active substances, and improves the oxidation utilization efficiency and removal capacity of oxidants for target pollutants.

The present invention discloses a method, device and storage medium for detecting the antioxidant activity of oat seeds, and relates to the technical field of antioxidant activity detection. The method for detecting the antioxidant activity of oat seeds comprises the following steps: average humidity fluctuation detection; humidity control analysis; seed grinding and antioxidant activity detection. The present invention detects the average humidity fluctuation of oat seeds and determines whether to perform seed grinding and antioxidant activity detection. If seed grinding and antioxidant activity detection are not performed, humidity control analysis is performed and it is determined whether to perform humidity control optimization. If seed grinding and antioxidant activity detection are performed, qualified antioxidant activity detection data is obtained, thereby improving the accuracy of oat seed humidity control analysis and achieving the effect of improving the accuracy of oat seed antioxidant activity detection, solving the problem in the prior art that oat seed antioxidant activity detection does not fully consider seed humidity.

The invention discloses a citric acid and licochalcone B repairing composition and application, and belongs to the technical field of medicine. According to the invention, the repair promoting potential of citric acid and the anti-inflammatory and anti-oxidation activity of licochalcone B are known, and the two natural active components with different action mechanisms are creatively compounded according to a specific proportion; therefore, the citric acid and licochalcone B repairing composition which has a synergistic effect on repairing gastric mucosa epithelial cell injury caused by HP infection is provided, the effect is better than that of a single component, safety and compliance are better, and a new technical approach is provided for solving the repairing problem of clinical gastric mucosa injury.

The invention discloses a preparation method of a composite ceramic filter, comprising the following steps: using BaZrO3 and Y2O3 as raw materials, wherein the ratio of BaZrO3 to Y2O3 is 75-25wt%: 5-75wt%; adding 0.2-1wt% of a dispersant and 15-30wt% of deionized water according to the mass fraction of the mixed raw materials to form a slurry, using a polyurethane foam with a pore size of 30-60PPI as a matrix, applying the slurry on the matrix, and sintering at high temperature by an in-situ decomposition carbon source method after drying. The composite ceramic filter prepared by the present invention can resist the erosion of a high oxidation active alloy melt in terms of use effect, has a good filtering effect for small-sized, especially micron-sized, inclusions, and can also automatically capture and adsorb Al2O3 non-metallic inclusions.