934 results about "Phenolic content in tea" patented technology

The invention discloses a metal-doped carbon quantum dot as well as preparation and application of the metal-doped carbon quantum dot in a nano antibacterial agent, citric acid, urea and tea polyphenol are taken as precursors, metal salt is added, carbon dot synthesis and metal ion doping are synchronously completed in one step through a hydrothermal method, and the metal-doped carbon quantum dot is prepared; the surfaces of the metal-doped carbon quantum dots are negatively charged, and the metal-doped carbon quantum dots have peroxidase-like activity and catalase-like activity at the same time; the metal ions adopt any one of Fe < 3 + >, Cu < 2 + > and Ce < 3 + >; the metal-doped carbon quantum dots are in a sphere-like shape. The metal-doped carbon quantum dots prepared by the preparation method disclosed by the invention have peroxidase-like activity and catalase-like activity at the same time through precise doping of metal ions, and the two activities have a synergistic effect in an oral periodontitis microenvironment, so that a good antibacterial effect is achieved.

The present invention belongs to the technical field of fiber materials, and relates to a composite fiber containing nano natural tea fibers, and a preparation method and application thereof. The raw materials for preparing the composite fiber include nano natural tea fibers and basic fiber pulp, and the nano natural tea fibers are mate nano fiber microemulsions. The present invention integrates nanotechnology into the preparation of natural tea fibers, and adopts a microemulsion method to simultaneously and evenly disperse a variety of effective ingredients in tea in the mate nano fiber microemulsion, so that the multifunctionality of the fabric can be effectively exerted; the microemulsion system has high uniformity and long-term stability, and during the spinning process, the nano tea fibers can be highly dispersed in the spinning solution without the need for additional surfactants, and the effect of the functional fabric finally obtained can be long-lasting. In addition, mate tea is rich in tea polyphenols and unique yerba mate alkaloids, which can further improve the comprehensive performance of the composite fiber.

The application discloses an Aspergillus niger strain and a culture method and application thereof, the Aspergillus niger strain is preserved in China Center for Type Culture Collection, and the preservation number is CCTCC NO: M 20241727. The fermented tea product obtained by fermenting tea leaves or tea leaf extracts by using the Aspergillus niger strain CCTCC NO: M 20241727 has prominent sweet and floral fragrance, and the astringency is obviously reduced; the contents of tea polyphenols, free amino acids and flavones are higher than those of a fermented tea product of an existing Aspergillus niger strain; the antioxidant activity is enhanced; the tea soup color is orange red and bright; and the color, fragrance and taste qualities are all superior to those of the fermented tea product of the existing Aspergillus niger strain.

The invention discloses a functional probiotic composition and application thereof, and relates to the technical field of microbial engineering. Bifidobacterium longum, lactobacillus acidophilus and enterococcus faecalis are combined to serve as a microbial agent, the microbial agent and active substances of the tea leaves form a composition, then the composition is combined with prebiotics, it is ensured that viable bacteria directly reach the intestinal tract through a microencapsulation technology, and the effect of improving the immune function is achieved; tea polyphenol in the active substances of the tea leaves can serve as a carbon source of prebiotics to stimulate proliferation of the bifidobacterium longum and the lactobacillus acidophilus, so that the acid resistance and intestinal colonization capacity of the microbial inoculum are enhanced, and meanwhile, theanine in the active substances of the tea leaves, the bifidobacterium longum and the lactobacillus acidophilus synergistically promote secretion of gamma-aminobutyric acid, so that the effect of improving the intestinal colonization is achieved. And the tea polyphenol can inhibit the large intestine rod from adhering to the intestinal mucosa, and the probiotic agent secretes antibacterial peptide, so that the integrity of the intestinal barrier is maintained together.

The invention provides a method for efficiently extracting tea polyphenol and tea polysaccharide and application, and belongs to the technical field of plant extraction.The extraction method comprises the following steps that tea leaves are pre-cooled and rolled and cut to obtain pretreated tea leaves, then the pretreated tea leaves are added into water to be mixed, biological enzyme is added for ultrasonic enzymolysis, filtering is conducted, and filtrate and tea residues are obtained; adding tea residues into water, mixing, adding an auxiliary agent, and carrying out low-temperature plasma treatment and filtration to obtain a filtrate; combining the filtrates, concentrating, precipitating, centrifuging, and collecting precipitate and supernate; washing and drying the precipitate to obtain a tea polysaccharide extract; and concentrating, extracting, adsorbing, eluting, re-concentrating and drying the supernate to obtain the tea polyphenol extract. The extraction method disclosed by the invention can be used for efficiently extracting the tea polyphenol and the tea polysaccharide in the tea leaves, the product yield and purity are high, and the tea polyphenol and the tea polysaccharide can be used for preparing health-care products for relieving diabetes and polyuria.

The invention belongs to the field of food processing, and particularly relates to an ostrich meat preservative and a preservation method. The ostrich meat preservative provided by the invention is prepared by matching and mixing the chitosan, the nisin and the tea polyphenol according to a specific proportion, so that the refrigeration refreshing time of the ostrich meat treated by the preservative can be effectively prolonged, the ostrich meat can maintain a relatively high L * value and a * value within 16 days of storage, the deterioration of meat color is delayed, the water-retaining property is remarkably improved, and the quality of the ostrich meat is improved. The content of thiobarbituric acid reactants and volatile basic nitrogen is obviously reduced, and fat oxidation and protein degradation are inhibited; the total number of bacterial colonies and the number of microorganisms such as coliform bacteria, pseudomonas, mould and saccharomycetes are obviously reduced. The growth and reproduction of putrefying bacteria can be effectively inhibited, and the cold fresh shelf life is prolonged.

The invention provides a fresh-keeping composite solution sprayed before picking fruits in cold-chain logistics transportation and a preparation method of the fresh-keeping composite solution, and relates to the field of fruit fresh keeping. The fresh-keeping composite solution is prepared from the following raw materials in parts by weight: 2.8 to 3.5 parts of schizochytrium limacinum powder, 2.3 to 2.8 parts of salvia officinalis extract, 1.8 to 2.2 parts of brown algae extract, 1.2 to 1.8 parts of banana peel polysaccharide, 0.8 to 1.2 parts of sodium carboxymethyl cellulose, 0.8 to 1.2 parts of tea polyphenol, 0.8 to 1.2 parts of beta-cyclodextrin, 0.8 to 1.2 parts of sodium alginate, 0.8 to 1.2 parts of calcium chloride, 0.4 to 0.6 part of olive oil, 0.1 to 1 part of malic acid and 80 to 90 parts of water. The composite fresh-keeping solution is developed for cold-chain logistics transportation of fruits and is applied before fruit picking, the synergistic effect of multiple natural components is utilized, sterilization and oxidation resistance can be achieved, the growth of microorganisms can be effectively inhibited, the respiration rate of the fruits is reduced, the moisture of the fruits is kept, and the optimal fresh-keeping effect is achieved. The fruit preservative is sprayed before the fruits are picked, so that decay and quality reduction of the fruits in the cold-chain logistics transportation process can be effectively reduced.

The invention relates to the field of oral cavities, and particularly discloses a lasting antibacterial type composite tooth socket for medicine carrying and a preparation method thereof.The lasting antibacterial type composite tooth socket comprises an adsorption layer and an antibacterial membrane layer, the adsorption layer is used for adsorbing oral cavity treatment liquid medicine, and the antibacterial membrane layer comprises a nano-silver antibacterial layer and a chitosan antibacterial layer; the preparation method comprises the following steps: mixing a tea polyphenol-polylactic acid composite solution, a nano-silver-carboxylation modified cellulose compound and a polyvinyl alcohol solution, and carrying out electrostatic spinning to prepare a nano-silver antibacterial fiber membrane, so as to form the nano-silver antibacterial layer; mixing chitosan with hot water, adding cinnamyl aldehyde, glycerol and boric acid, stirring to obtain a mixed solution, coating one side of the nano-silver antibacterial layer with the mixed solution, and curing to form a chitosan antibacterial layer; the adsorption layer is attached to the side, away from the chitosan antibacterial layer, of the nano-silver antibacterial layer, and then the lasting antibacterial type composite tooth socket for carrying the medicine is prepared through hot-pressing compounding. The drug-loaded composite tooth socket has the characteristic of further improving the antibacterial property and the antibacterial durability of the drug-loaded composite tooth socket.

The invention discloses a preparation technology of directional debitterizing yellow tea, and belongs to the technical field of tea processing. Fresh tea leaves are used as raw materials, the yellow tea is prepared through the processes of pretreatment, fermentation, fixation, rolling, heaping for yellowing and drying, during fermentation, a compound bacteria solution and the spread and aired fresh leaves are mixed and fermented, strains in the compound bacteria solution comprise lactic acid bacteria, saccharomycetes and bacillus, and through the synergistic effect of the lactic acid bacteria, the saccharomycetes and the bacillus, the yellow tea is prepared. Balancing of directional degradation of bitter and astringent substances and generation of flavor substances is achieved, high-quality yellow tea is prepared through efficient debitterizing, the stage heaping yellowing technology is adopted, primary heaping and secondary heaping are adopted for two-stage heaping yellowing, the quality of the yellow tea is enhanced, and poor taste caused by excessive heaping yellowing is avoided. According to the finished tea prepared by the preparation process, the content of tea polyphenol is reduced to 18%-20% through detection, the content of amino acid reaches 4.5%-5.0%, bitter taste and astringent taste are relieved, sweet taste is added, and the taste is mellow.

The invention discloses a high-oxidation-resistance long-life polyethylene cable sheath material and a preparation method thereof, and relates to the technical field of high polymer materials. Comprising the following components: high-molecular-weight high-density polyethylene, surface-modified nano-dioxide, furan-maleimide grafted polyethylene, a Schiff base dynamic cross-linking agent, tea polyphenol grafted polyethylene, a temperature-responsive oxygen-blocking microcapsule, a main antioxidant, an auxiliary antioxidant, an emergency antioxidant, a light stabilizer, a halogen-free flame retardant, a processing aid and an acid absorbent. According to the invention, the main antioxidant, the auxiliary antioxidant and the tea polyphenol grafted polyethylene form a chemically synthesized and naturally modified composite antioxidant system, the designed service life of the material is greatly prolonged, the temperature-responsive oxygen-blocking microcapsule automatically cracks to release the core material when the operating temperature of the cable is greater than or equal to 90 DEG C, a dynamic oxygen-blocking layer is formed, and the service life of the cable is prolonged. The defect that the effect of traditional physical oxygen barrier is attenuated at high temperature is overcome, and the oxygen permeability at high temperature is reduced compared with that of a single nano barrier scheme.

The invention provides a fat-reducing composition based on an agaricus bisporus extract as well as a preparation method and application of the fat-reducing composition, and belongs to the technical field of nutrition and health care. The fat-reducing composition comprises the following raw materials in parts by weight: 10-30 parts of an agaricus bisporus extract, 5-15 parts of a green tea extract, 5-15 parts of bitter gourd peptide, 3-10 parts of seaweed meal and 10-30 parts of resistant dextrin. The agaricus bisporus extract disclosed by the invention can regulate intestinal flora and promote fat metabolism; tea polyphenol in the green tea extract can inhibit fat synthesis and promote fat oxidation; momordica charantia peptide has an obvious hypoglycemic effect; the seaweed meal (containing fucoxanthin) has the effects of burning fat cells and eliminating fat accumulation; the resistant dextrin is used as dietary fiber, so that satiety is increased, and caloric intake is reduced. The raw materials cooperate with each other, so that the composition has better fat-reducing and weight-reducing effects, and the total cholesterol and triglyceride levels are reduced.

The invention relates to the technical field of pharmaceutical preparations, in particular to a preparation process of carbon dots for killing helicobacter pylori and application of the carbon dots in oral pharmaceutical preparations. The preparation method comprises the following steps: mixing microcrystalline cellulose and glycerol, freezing and crushing at an ultralow temperature, and selectively hydrolyzing by combining citric acid-malic acid mixed acid liquor to efficiently prepare a high-crystallinity cellulose nanocrystal template; the controllable synthesis of the carbon dots is realized by utilizing the hydrogen-bond interaction of hydroxyl / carboxyl on the surface of the cellulose nanocrystal and the nitrogen doping effect in the polymerization and carbonization process of citric acid and urea. Besides, when a sodium alginate-chitosan double-layer structure is constructed, carbon dots are introduced into the inner layer to endow the inner layer with special performance, a protein-polysaccharide network is formed on the outer layer through transglutaminase enzymatic crosslinking, and the oxidation resistance and mechanical strength are enhanced through secondary curing of tea polyphenol. According to the invention, food-grade raw materials are used for realizing high-efficiency antibiosis, the oral preparation safety specification is met, and the clinical transformation potential is realized.

The application discloses a preparation method of a hydrophilic oil-water separation anti-pollution membrane and the anti-pollution membrane and application thereof, and prepares MNRs material; the MNRs material is dispersed in dimethylacetamide, is uniformly stirred, polyvinylpyrrolidone is added, and stirring is continued, and a first mixture is obtained through ultrasonic treatment; the first mixture is mixed with polyvinylidene fluoride to obtain a second mixture, and the second mixture is stirred; the treated second mixture is dip-coated on a carrier, the dip-coated carrier is treated in deionized water to obtain an ultrafiltration membrane; the ultrafiltration membrane is soaked in a tea polyphenol solution with a Tris-HCl buffer solution, and is shaken to obtain the hydrophilic oil-water separation anti-pollution membrane. The hydrophilic oil-water separation anti-pollution membrane has excellent separation efficiency and flux recovery rate for four different oil-water mixtures of kerosene, gasoline, edible oil and n-hexane. The preparation process of the oil-water separation membrane is simple, the cost is low, and the reaction condition is mild; when the oil-water separation membrane is applied to organic wastewater separation, the oil-water separation membrane has the advantages of high efficiency, good removal performance and good recycling performance.

The invention relates to a composite dissoluble microneedle gel patch mask and a preparation method thereof. Comprising the following steps: (1) preparing a lipid oil phase solution and a water phase solution; mixing the lipid oil phase solution with the water phase solution to obtain a liposome suspension; (2) preparing recombinant collagen hydrogel; (3) adding the tea polyphenol and the lipidosome suspension into the recombinant collagen hydrogel to obtain composite gel; and (4) injecting the composite gel into a mold, carrying out vacuum drying, and demolding to obtain the composite dissoluble microneedle gel patch mask. According to the composite dissoluble microneedle gel patch mask provided by the invention, the tea polyphenol, the plant exosome and the liposome carrier are integrated into the microneedle gel patch mask for the first time, the oxidation resistance is improved by utilizing the tea polyphenol, the inflammation resistance is improved by utilizing the plant exosome, the transdermal effect is enhanced by utilizing the liposome, the transdermal efficiency reaches 35.2-42.5 mu g / cm < 2 > / h, the medical beauty effect is obvious, and the application prospect is wide. The obvious advantages are realized in the aspects of safety, transdermal efficiency and repairing effect.

The invention discloses a preparation method and application of an environment-friendly easily-degradable hydrogel coating, and relates to the technical field of hydrogel coatings. The coating is a coating comprising chitosan, acrylic acid, sericin, silk fibroin, silk peptide, tea polyphenol, a photoinitiator, a plasticizer and a leveling agent. The preparation method comprises the following steps: (1) preparing the coating containing the components; (2) coating the surface of food packaging paper with the coating liquid in a slit coating manner; and (3) performing ultraviolet light initiation to obtain the coating. The hydrogel coating has a synergistic effect with the sericin, the silk fibroin, the silk peptide and the tea polyphenol to form a compact and uniform network structure, so that the water-retaining property, the mechanical strength, the flexibility and the antibacterial property are enhanced; the preservative not only has the advantages of environmental protection and degradability, but also has the functions of moisturizing, antibiosis and preservation, and can significantly prolong the shelf life of food and improve the quality. The environment-friendly packaging paper is applied to food packaging paper, not only conforms to the green packaging trend, but also expands the use scenes of environment-friendly materials in the fields of fresh food, baking and the like.

The invention belongs to the field of optical sensing technology and food component analysis, and discloses a tea polyphenol detection method and a tea polyphenol detection device based on an infrared evanescent wave absorption spectrum. Comprising the following steps that a conical infrared optical fiber sensor is provided, the conical infrared optical fiber sensor is obtained by drawing an optical fiber with the diameter of 150-1000 microns to obtain a conical infrared optical fiber, and then the end faces of the two ends of the conical infrared optical fiber sensor are polished till the end faces of the optical fiber are free of scratches, so that the two end faces of the optical fiber are flat, smooth and bright and form mirror faces; the conical infrared optical fiber sensor is packaged in the sample pool, the upper end of the sample pool is open, and a to-be-detected sample solution is injected and fully coats the optical fiber; an 850-4000 cm <-1 > infrared light source is provided, focused infrared light enters the optical fiber and is fully coupled with the optical fiber, an infrared evanescent wave absorption spectrum is collected, and qualitative and quantitative analysis is carried out on the tea polyphenol content based on the tea polyphenol characteristic peak intensity. The method for detecting the tea polyphenol has the characteristics of rapidness, high sensitivity and low detection limit.

The invention relates to the technical field of plastic films, in particular to an antibacterial degradable film and a preparation method thereof. The problem that a traditional degradable film is poor in antibacterial property and mechanical property is solved. The film is prepared from the following raw materials: PLA, PBS, PHA, PCL, modified nanocellulose, an antibacterial agent, composite antibacterial particles and maleic anhydride grafted PLA. The preparation method comprises the following steps: preparing functional master batches from silane coupling agent modified nano-crystalline cellulose and PLA, preparing antibacterial master batches from ZIF-8 loaded tea polyphenol antibacterial agent, mesoporous silica loaded chitosan composite antibacterial particles and PBS, adding the rest of matrix resin, functional master batches, antibacterial master batches and compatilizer into an extruder step by step, and carrying out extrusion molding to obtain the composite antibacterial material. And after mixing, plasticizing and exhausting, blow-molding to form a film, thereby obtaining the antibacterial degradable film. The mechanical property is enhanced through the functional master batch, and the composite antibacterial system has synergistic interaction, so that the film has excellent antibacterial property and mechanical property on the basis of degradability.

The invention provides an extraction process and application of tea leaves, and particularly relates to the technical field of cosmetics. The extraction process of the tea leaves comprises the following steps: extracting raw dark green tea leaves with a color fixative, decolorizing with a clarifying agent, activated carbon and a clarifying agent in sequence, filtering, and finely filtering to obtain the tea leaf extract. The extraction process provided by the invention solves the problems of easy oxidation of active ingredients, many impurities, poor storage stability and the like in the traditional tea extraction process, can efficiently retain the active ingredients such as tea polyphenol and the like, and the extract is high in purity and good in stability and can be used in anti-aging and anti-inflammatory cosmetics. The tea leaf extract and the artemia extract have a remarkable synergistic effect in the anti-oxidation and anti-inflammatory aspects, can be used in anti-aging and anti-inflammatory cosmetics, and have a good application prospect.

The invention relates to the technical field of functional antioxidants, in particular to a stability-enhanced antioxidant based on pterostilbene and a preparation method and application thereof. The pterostilbene tablet comprises the following components in percentage by weight: 10-30% of pterostilbene, 8-20% of Arabic gum, 5-15% of tocopheryl succinate, 1-5% of disodium ethylene diamine tetraacetate, 30-60% of beta-cyclodextrin, 2-8% of rosmarinic acid, 1-6% of chitosan quaternary ammonium salt, 0.5-3% of nano silicon dioxide and 2-7% of polyglycerol fatty acid ester. In the preparation process, beta-cyclodextrin and pterostilbene form an inclusion compound, the dispersity of nano silicon dioxide and chitosan quaternary ammonium salt is improved through hydrogen bonds, and tea polyphenol or ascorbyl palmitate can be added to enhance the synergistic effect. The antioxidant is high in stability, high in pterostilbene retention rate, uniform in dispersion, free of agglomeration, excellent in antioxidant activity, suitable for the fields of foods, cosmetics and medicines, simple in preparation process, low in consumption and suitable for industrial production.

The invention discloses a method for preparing a vanadium electrolyte by electrochemistry-ultrasonic synergistic reduction of a waste vanadium catalyst in the technical field of solid waste resource utilization, which comprises the following steps of: roasting the waste vanadium catalyst by NaOH and leaching by sulfuric acid, applying 80Hz pulse current by adopting a titanium-based lead dioxide anode and a graphite cathode in a three-chamber electrolytic bath, synchronously starting a 25kHz and 300W ultrasonic field for synergistic reduction, and controlling the reaction temperature to be 35 + / -2 DEG C until the V < 5 + > concentration is less than 0.05 g / L; and then adding a chitosan-tea polyphenol composite stabilizer, and concentrating through a PVDF (Polyvinylidene Fluoride) ultrafiltration membrane to obtain electrolyte with the vanadium concentration of 1.8 mol / L, wherein the molar ratio of V < 4 + > to V < 3 + > is 1: 1.2, Fe < 3 + > is less than 15 ppm, and Al < 3 + > is less than 10 ppm. In the process, the vanadium recovery rate reaches 95.2%, the energy consumption is 2.8 kWh / kg vanadium and is reduced by 65% compared with that of a traditional process, and the cycle life of the electrolyte is prolonged to 1200 times or above.

The invention discloses a preparation method of a quinoa-fruit compound beverage, and belongs to the technical field of beverage processing. Comprising the following steps: S1, raw material pretreatment (in the quinoa pretreatment, high-viscosity enzymolysis modified quinoa pulp is prepared through double-enzyme synergistic hydrolysis of acid protease and natural kiwi fruit protease in kiwi fruit juice in combination with gradient heating and grinding; the preparation method comprises the following steps: pretreating raspberries, namely preparing suspended raspberry seed pulp by freeze-drying, superfine grinding and coating with enzymolysis modified quinoa pulp, and meanwhile, adding tea polyphenol, glycerol and a compound buffer agent to prepare color-protecting anti-crosslinking raspberry juice), S2, blending and homogenizing, and S3, sterilizing and filling. Through three stages of raw material pretreatment, blending and homogenization, and sterilization and filling, the nutritional conflict problems mentioned in the background technology, such as quinoa protein acid denaturation and aggregation, quinoa PPO-mediated raspberry anthocyanin oxidation browning, raspberry seed retention and suspension stability, and taste adaptation, are solved.

The invention discloses a degradable preservative film and a preparation method thereof. The film takes nano chitosan / agarose in a ratio of 1: 1 as a matrix, contains 0.5-5wt% of PVA (Polyvinyl Alcohol), 1-4wt% of protein powder or starch, 0.2-3wt% of tea polyphenol / carvacrol, 5-20wt% of glycerol and optional 5-15wt% of polylactic acid, and is cross-linked with sodium alginate. And carrying out tape casting at 55-65 DEG C, and carrying out gradient drying at 40-50 DEG C, thereby obtaining the product. The film is compact and flexible, the breaking strength is larger than or equal to 69 MPa, the oxygen permeability is low, the inhibition zone on six germs is enlarged by 3-4 mm, 98% of natural soil is degraded 20 days later, and no toxic smoke is generated during incineration. The biodegradable film is solvent-free in preparation, can be produced by existing equipment, is lower than a traditional biodegradable film in cost, can be in direct contact with food, remarkably prolongs the fresh-keeping period of fruits and vegetables, replaces PE and PVC, and solves white pollution.

The invention belongs to the technical field of sanitary napkins, and relates to a plant fiber breathable bacteriostatic sanitary napkin and a preparation method thereof.The plant fiber breathable bacteriostatic sanitary napkin comprises a liquid permeable surface layer, a flow guide bacteriostatic layer, an absorption core, a breathable bottom layer and a release film which are sequentially stacked and bonded; the diversion antibacterial layer is obtained by blending and hot-pressing modified plant fibers and modified polypropylene fibers; the modified plant fibers are obtained by soaking plant fibers in a bacteriostatic solution, and the bacteriostatic solution comprises tea polyphenol and salicylic acid which are co-included by beta-cyclodextrin, a chamomile extract coated by lecithin and chitosan quaternary ammonium salt; the modified polypropylene fibers are obtained by sequentially modifying polypropylene fibers by a silane coupling agent and grafting and modifying the polypropylene fibers by chitosan. The technical problems that a traditional sanitary towel product is not lasting in antibacterial effect, liquid permeation is slow, and bacteria are prone to breeding in a humid and hot environment are effectively solved, and the use safety and comfort of the sanitary towel are improved.

The invention relates to the technical field of automobile sealing strips, and provides an anti-aging rubber sealing strip for an automobile and a preparation method of the anti-aging rubber sealing strip. The anti-aging rubber sealing strip for the automobile comprises the following components in parts by weight: 55-70 parts of ethylene propylene rubber, 30-45 parts of ethylene propylene diene monomer, 4-8 parts of an anti-aging agent, 35-60 parts of a filling agent, 3-7 parts of a softening agent, 8-10 parts of a plasticizer, 1.2-2.5 parts of an accelerant, 4-8 parts of zinc oxide and 1-2 parts of a vulcanizing agent. The anti-aging agent comprises diatomite-loaded tea polyphenol and a diatomite-loaded anti-aging agent. By means of the technical scheme, the problem that in the prior art, an automobile rubber sealing strip is poor in aging resistance is solved.

The invention belongs to the technical field of food packaging materials, and particularly relates to a preparation method and application of a chitosan-gelatin-tea polyphenol composite preservative film. The invention discloses a chitosan / gelatin / tea polyphenol composite membrane which is prepared by taking chitosan and gelatin as matrixes and tea polyphenol as an active additive through a film casting method. When the addition amount of the tea polyphenol is 1.5%, the comprehensive performance of the composite film is optimal, the ultraviolet light transmittance is as low as 0.113%, and the antibacterial rates on escherichia coli and staphylococcus aureus respectively reach 73.34% and 99.78%. When the strawberry preservative is applied to strawberry preservation, the mass loss rate is only 15.27% after 11 days, the sensory quality is well kept, and the shelf life is prolonged by 4 days. The composite film has excellent antibacterial and fresh-keeping performance, the raw materials are natural and degradable, and the composite film has wide application prospects in the field of fruit and vegetable fresh-keeping.

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 discloses an antibacterial and deodorant functional fabric and a preparation method thereof, and relates to the technical field of textile fibers. When the antibacterial and deodorant functional fabric is prepared, pre-modified titanium dioxide reacts with diallyl chlorophosphate to prepare modified titanium dioxide; the preparation method comprises the following steps: carrying out polycondensation on hydroxypropyl-terminated polydimethylsiloxane, ethylene glycol, 3, 5-pyridinedicarboxylic acid and terephthalic acid to prepare polyester, and reacting with 4-chloromethylstyrene to prepare modified polyester; carrying out melt spinning on the modified polyester and the modified titanium dioxide to obtain polyester fibers; spinning polyester fibers to obtain a fiber fabric; carrying out coprecipitation on the carboxylated beta-cyclodextrin and tea polyphenol to prepare a carboxylated beta-cyclodextrin inclusion compound; the preparation method comprises the following steps: mixing a polyester fabric with a sodium hydroxide aqueous solution to prepare an alkali-treated polyester fabric, and immersing the alkali-treated polyester fabric into a carboxylated beta-cyclodextrin inclusion compound aqueous solution to prepare the antibacterial and deodorant functional fabric. The antibacterial and deodorant functional fabric prepared by the invention has good antibacterial, deodorant, flame-retardant and mechanical properties.

The invention belongs to the technical field of health-care food, and particularly relates to functional milk assisting in lowering blood pressure and a preparation method thereof.The functional milk comprises, by weight, 99.5% of raw milk and 0.5% of a potassium ion bridged citrus fiber-green tea polyphenol network, raw milk is sequentially subjected to trypsin and proline specific incision enzyme treatment, HPCD-ultrasonic treatment and pulsed magnetic field treatment. The invention provides a systematic solution, which exceeds a simple extraction and addition mode in the prior art, and solves the stability problem of the antihypertensive active component in the processing and storage process.

The invention discloses an anti-aging agent for rubber and a preparation method of the anti-aging agent, and relates to the field of anti-aging agents. According to the invention, the grafted compound is compounded with the ultraviolet light absorber and the anti-ozone agent to generate a synergistic effect; the tea polyphenol provides hydrogen atoms through phenolic hydroxyl groups to be rapidly combined with free radicals, the tea polyphenol is preferentially oxidized, the free radical chain reaction is terminated, and the antiozonant captures the free radicals through amino groups; the ultraviolet light absorber captures free radicals induced by ultraviolet light, converts light energy into heat energy to be released, blocks a photo-oxidation chain reaction, forms a broad-spectrum covered anti-oxidation network aiming at different free radical types, and enhances the anti-aging performance of the rubber; the tea polyphenol is fixed in the channels of the modified silicon dioxide through hydrogen bonds, so that the tea polyphenol is loaded on the silicon dioxide to form a grafted compound with a stable structure, thereby delaying the aging and degradation of the rubber.

The invention discloses a prebiotic composition capable of proliferating intestinal beneficial flora and a preparation method thereof, and the prebiotic composition comprises the following raw materials in parts by weight: 35-45 parts of partially hydrolyzed complex gum, 30-40 parts of green banana resistant starch, 15-25 parts of enzymolysis okra polysaccharide and 3-5 parts of tea polyphenol. According to the composition, the partially hydrolyzed complex gum with specific molecular weight, the green banana resistant starch, the enzymolysis okra polysaccharide and the tea polyphenol are scientifically compounded, so that efficient proliferation of intestinal effective microbial communities and comprehensive and positive regulation and control of intestinal microenvironment are realized, and the composition is prepared by utilizing four components with complementary functions and different effects. The bacillus amyloliquefaciens can effectively proliferate traditional beneficial bacteria such as bifidobacteria and lactobacillus, can effectively nourish butyric acid producing bacteria such as clostridium praeparatum and inhibit growth of harmful bacteria, so that the bacillus amyloliquefaciens has the function of remarkably improving intestinal flora disorder caused by ampicillin, and has the functions of promoting generation of short-chain fatty acid and maintaining intestinal barriers.