447 results about "Tannin" patented technology

The present invention belongs to the technical field of biomass resource utilization and microbial fertilizers, and specifically relates to a fertilizer based on oil-tea camellia cattail, a preparation method and its application. The fertilizer described in the present invention is prepared by a collaborative fermentation process of Aspergillus niger, Phanerochaete chrysosporium and Bacillus subtilis. The obtained fermentation product is separated into solid and liquid to obtain a solid, the solid being a solid fertilizer, and the liquid being a foliar fertilizer after post-treatment. Both can be used for the cultivation of crops such as tangerines and oil-tea camellias. Based on the microbial collaborative fermentation process, the content of anti-nutritional factors tannin and tea saponin in the obtained solid fertilizer is significantly reduced, which is less than 1.8 g / kg and 0.1% respectively on a dry basis, while maintaining a seed germination index higher than 95%. According to a planting comparative test, the average yield per mu of oil-tea camellias using the solid fertilizer and liquid fertilizer obtained in this application increased by 12%. The average yield per mu of tangerines increased by about 11%, and the sugar, vitamin C, and trace element contents in tangerines were higher than those using traditional fertilizers.

The present invention relates to a pet sterilizer and deodorizer, which belongs to the technical field of pet deodorization. The present invention promotes the long-term expression of hop extract and enhances the sterilization and deodorization effect through the synergistic effect of hop extract, persimmon tannin, and lysozyme. Furthermore, the composition is stable, natural, and pollution-free, and can be used in the oral cavity and in vitro of animals. The present invention also provides zinc ricinoleate and an antibacterial agent. Through the three-phase interaction of zinc ricinoleate, hop extract, and antibacterial agent, the overall stability is enhanced and the antibacterial time of the complex is prolonged while ensuring antibacterial and deodorizing effects. The present invention also provides a modified quaternary ammonium salt antibacterial liquid. The modified quaternary ammonium salt has enhanced stability and, when present together with zinc ricinoleate, promotes an enhanced deodorizing effect. The present invention also provides an Artemisia annua extract, a Gentiana root extract, and an Artemisia argyi extract, which can eliminate odor sources and significantly inhibit bacterial growth, thereby having significant antibacterial, deodorizing, and odor-removing effects.

The invention discloses Klebsiella and application thereof, and belongs to the technical field of microorganisms. According to the invention, firstly, a strain LLMJ-DNXJ-01 with high yield of tannase is screened from wine-making yeast, the identification result shows that the strain belongs to klebsiella, then the tannase activity of the strain is investigated, and the result shows that the enzyme activity reaches 8.8 + / -0.02 U / mL. In addition, the invention also investigates the application of the strain in degrading sorghum tannin, the sorghum tannin degradation rate reaches 34.95%, and isoamyl alcohol, isopentenol, caryophyllene, phenethyl alcohol, 4-vinyl guaiacol and other volatile aroma substances with Daqu characteristics can be generated through fermentation. Therefore, by integrating the tannase production capability of the strain LLMJ-DNXJ-01 and the sorghum tannin degradation and fermentation aroma production capability, the strain has relatively good development potential in the aspects of manufacturing of reinforced yeast for making hard liquor and quality improvement and aroma enhancement of white spirit.

The utility model discloses an ice persimmon closed-loop heat pump dryer which comprises a drying chamber and a heat exchange system, and the drying chamber is provided with an air valve and a fan; the heat exchange system comprises a compressor, a condenser set, an electronic expansion valve and an evaporator which are sequentially connected and form a refrigerant circulation loop. The drying chamber has a high-temperature mode and a low-temperature mode, when the drying chamber is in the high-temperature mode, the air valve is closed, and when the drying chamber is in the low-temperature mode, the air valve is opened. Due to the indoor condenser and the outdoor condenser, the drying chamber can be flexibly switched between a high-temperature mode and a low-temperature mode, and the alternate operation mode not only can quickly and uniformly remove moisture in the persimmons, but also effectively reduces the tannin content in the persimmons. An air valve is arranged in the drying chamber and can change the flow direction of air in the drying chamber according to the working mode. Air flows through the heat regenerator twice and is heated / cooled, and the humidity is rapidly reduced in the process.

The invention relates to the technical field of water treatment, in particular to a method for preparing a quaternized modified tannin-based organic flocculant through irradiation grafting, a product prepared through the method and application of the quaternized modified tannin-based organic flocculant. The method comprises the following steps: (1) under the irradiation of 30-60 mW / cm < 2 > of ultraviolet light, adding brominated vinyl triphenylphosphine into a mixture of tannic acid and a photoinitiator for reaction; (2) adjusting the ultraviolet intensity to 5-20 mW / cm < 2 > for reaction; (3) closing the ultraviolet reaction; and (4) precipitating the product with ethanol, filtering and washing to obtain the quaternary phosphonium modified tannin-based organic flocculant. Wherein the photoinitiator is selected from one of benzophenone and benzoin dimethyl ether. The quaternized modified tannin-based organic flocculant provided by the invention can efficiently remove algae in a water body in an environment-friendly manner, and avoids secondary pollution caused by algae cell rupture at the same time.

The invention relates to the technical field of water treatment, in particular to a whisker type dication modified tannin-based organic flocculant as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) adding tetrabutylphosphonium bromide into an alkaline solution of tannic acid, and reacting at 50-80 DEG C for 2-4 hours; (2) dispersing the precipitate in water, continuously introducing nitrogen, adding a first free radical initiator at 50-80 DEG C for reaction, then adding dimethyl diallyl ammonium chloride and a second free radical initiator, and reacting for 2-4 hours; and (3) extracting by using a mixed solution of acetone and ethanol to obtain a precipitation product, filtering and washing to obtain the product. The quaternary phosphonium salt and the quaternary ammonium salt which have strong cationic property and good water solubility are grafted to the tannic acid step by step, so that the water solubility and the flocculation effect of the tannic acid are remarkably improved, meanwhile, the biodegradability and the environmental friendliness of the tannic acid are kept, and the technical effects of efficiently removing algae and cooperatively removing algal toxins can be achieved.

The invention belongs to the technical field of radioactive wastewater treatment and uranium extraction from seawater, and discloses a high-flux cellulose immobilized tannin membrane adsorption material as well as a preparation method and application thereof. The membrane adsorption material comprises an aldehyde cellulose acetate microfiltration membrane and waxberry tannin which is cured on the microfiltration membrane through gradient cross-linking. The membrane adsorption material provided by the invention keeps a reticular porous structure of a cellulose microporous filter membrane and has the characteristics of high flux and rapid mass transfer, the pure water flux of a single-layer membrane can reach 300 L / (m.h), the treatment capacity of a multi-layer membrane is remarkably increased, large-flow treatment can be realized, and the efficiency of extracting uranium from seawater or uranium-containing wastewater is remarkably improved.

The invention belongs to the technical field of microbial fermentation, discloses a method for multi-bacterium synergistic fermentation of roxburgh rose juice, and particularly discloses a microbial agent which comprises rhizopus arrhizus CLF001 and at least one of pediococcus pentosaceus, lactobacillus plantarum, acetic acid bacteria, saccharomycetes and lactobacillus acidophilus. According to the microbial agent provided by the invention, the content of polysaccharide, polyphenol, brass and the like can be remarkably increased and the content of tannin in the roxburgh rose normal juice can be reduced by fermenting the roxburgh rose normal juice for 3 days by using the microbial agent, so that the fermented roxburgh rose normal juice does not feel obvious astringent taste, and the bitterness of the roxburgh rose normal juice is greatly improved; when the microbial agent is used for fermentation, polyphenol substances such as tannin with heavy astringent taste in the roxburgh rose normal juice are converted into non-astringent polyphenol substances, the taste of the normal juice is improved, the content of active ingredients is increased, for example, key ingredients (such as polyphenol, flavone and polysaccharide) capable of remarkably improving the antioxidant activity in the roxburgh rose normal juice can be used for improving the antioxidant performance of the roxburgh rose normal juice.

The invention discloses a Chinese gall leaven preparation method based on constant-temperature fermentation, and relates to the technical field of Chinese gall leaven preparation. The preparation method comprises the following steps: respectively and independently cleaning gallnut, distiller's yeast of white spirit and tea water, and removing non-medicinal parts, mildewed medicinal materials and impurities; the method comprises the following steps: uniformly mixing gallnut powder, distiller's yeast of Baijiu and tea leaves according to a mass ratio of (10-15): (0.5-1): (2-4), adjusting the moisture content to 40-45%, and spreading the mixture in a material tray; according to the method, constant-temperature fermentation equipment is introduced, so that the temperature in the fermentation process is always kept within the range of 26 + / -5 DEG C for 60-72 hours, and drying, crushing and briquetting are performed. Compared with the traditional natural fermentation process, the constant-temperature fermentation has the advantages that the tannin biotransformation efficiency is remarkably improved, the tannin content is greatly reduced, the gallic acid content is greatly improved, the curative effect is greatly improved, the sour and astringent taste of the product is remarkably improved, the fermentation time is greatly shortened, the production efficiency is improved, and the energy cost is reduced.

The invention discloses a method for improving the quality of a Tieguanyin tea extracting solution through segmented composite enzymolysis extraction, and belongs to the technical field of tea drink preparation. The method comprises the following steps: S1, performing low-temperature aroma extraction on Tieguanyin dry tea, and performing crushing so as to obtain crushed tea; s2, adding water and beta-glucosidase into the broken tea to carry out first-stage enzymolysis extraction, and separating to obtain tea aroma extract liquid and aroma-free tea residues; s3, water and composite hydrolase are added into the aroma-free tea residues for second-stage enzymolysis extraction, separation and filtration are performed, and a hydrolysis extraction solution is obtained; and S4, mixing the tea fragrance extract liquid with the hydrolysis extract liquid, cooling, centrifuging and filtering to obtain the Tieguanyin tea extract liquid. According to the method disclosed by the invention, the original flavor of the Tieguanyin is maintained, meanwhile, the fragrance and the mouth feel are remarkably improved, and the problems of fragrance loss and bitter taste caused by traditional high-temperature long-time extraction and cooked soup taste generated by tannase enzymolysis are avoided.

The invention relates to the technical field of food engineering, and discloses pediococcus acidilactici, a microbial agent containing the pediococcus acidilactici, application of the microbial agent, sorghum fermented food and a preparation method of the sorghum fermented food. The preservation number of the pediococcus acidilactici is GDMCC (China General Microbiological Culture Collection Center) No.65676, and the pediococcus acidilactici can be used for preparing the pediococcus acidilactici. The microbial agent contains pediococcus acidilactici and auxiliary bacteria. According to the sorghum fermented food obtained through fermentation treatment of the fungicide, antinutritional factors such as tannin in sorghum can be converted into urolithin, hydrolysis of protein, fat and starch can be promoted, the utilization rate of the sorghum is increased, the quality and flavor of fermented products are improved, the fermentation period is shortened, the shelf life is prolonged, and high economic benefits are achieved.

The invention relates to a salt-resistant biomass interface evaporation material as well as a preparation method and application thereof, and relates to the technical field of interface evaporation materials. The preparation method comprises the following steps: mixing sunflower fiber dispersion liquid, polyvinyl alcohol and carbon-containing molybdenum disulfide, then adding glutaraldehyde, then carrying out liquid nitrogen freezing and freeze drying, sequentially soaking with a tannic acid solution, a calcium chloride solution and a ferric chloride solution, and then carrying out freeze drying. Natural sunflower fibers are used as a main framework, cotton is used as a supporting material, carbon-containing MoS2 is prepared and crosslinked with polyvinyl alcohol, a hydrophilic functional layer is constructed on the surface of the material through tannic acid, and the tannic acid is coordinated and complexed with Ca and Fe < + >, so that a more stable hydrophilic complexed coating is formed on the surface of the material; the surface wettability and the water conveying capacity of the material are further improved, meanwhile, salt crystal deposition and precipitation in the seawater evaporation process are effectively inhibited, and the oxidation resistance and the seawater corrosion resistance of the material are improved.

The invention relates to the technical field of biological medicine, in particular to anti-acne hydrogel and a preparation method thereof. The anti-acne hydrogel is prepared from metal-polyphenol network nanoparticles and a hydrogel base material, the metal-polyphenol network nanoparticles comprise a first polyphenol compound, a second polyphenol compound and metal ions, the first polyphenol compound is a tannic acid compound, and the second polyphenol compound is a flavonoid compound; the hydrogel base material comprises a hydrophilic high-molecular polymer and a cationic polymer. The metal-polyphenol network nano-particles are creatively utilized, the anti-inflammatory and anti-oxidation activity of flavonoid compounds, the convergence and protein binding characteristic of tannin and the antibacterial activity of metal ions are integrated at the same time, and the vicious circle of acne can be intervened at the same time from multiple links of antibacterial, anti-inflammatory, anti-oxidation and keratinization adjustment; and the defect of single action target spot of the existing medicine is overcome.

The invention relates to an instant composition with a long-acting oral health-care function for dogs and cats as well as a preparation method and application of the instant composition, and belongs to the technical field of pet food and pet oral care. The composition comprises 20%-30% of whey protein powder, 10%-20% of hydrolyzed gelatin, 1%-3% of low-molecular-weight chitin saccharide gum, 1%-2% of modified cassava starch, 2%-5% of sodium alginate, 1%-3% of fructo-oligosaccharide, 0.03%-0.08% of lysozyme, 0.03%-0.08% of tea polyphenol, 0.05%-0.15% of zinc gluconate, 0.05%-0.1% of persimmon tannin, 3%-5% of tuna hydrolysate, 4%-6% of whole goat milk powder, 2%-4% of skim yoghurt powder and the balance water. The added active ingredients have long-acting slow-release and continuous effects in the formula, oral pathogenic bacteria can be effectively inhibited, dental plaque and dental calculus formation can be reduced, halitosis can be lastingly relieved, and the toothpaste has good market competitiveness.

The invention discloses a galiaceae-euphorbia tripsacus compound extract as well as a preparation method and vagina repair application thereof. The compound extract is prepared from galiaceae herbs and euphorbia tripsacus according to a scientific ratio through compound enzymolysis pretreatment, gradient ethanol solvent step-by-step extraction and double-resin series purification. According to the preparation method, the dissolution rate of the active components is remarkably increased by utilizing an enzymolysis wall breaking technology, the problem that the purity of the multi-polar components (tannin, flavone and polysaccharide) is difficult to increase and extract at the same time is solved through gradient extraction and series purification, and the purity of the total active components is more than or equal to 60%. The obtained composite extract has multiple effects of astringing and tightening, promoting regeneration of elastic fibers and improving contractility of smooth muscles, and is safe and non-irritant. The invention further discloses targeted sustained-release gel containing the extract, and the targeted sustained-release gel can be used for improving vaginal relaxation and deeply repairing private parts.

The invention relates to the technical field of oily sewage treatment, and discloses a flocculant as well as a preparation method and application thereof. The flocculant contains a component A, a component B, a component C and a component D, the component A contains etherified starch and nano magnetic iron oxide, the component B contains sodium bentonite and nano magnetic iron oxide, the component C contains tannin modified chitosan and nano magnetic iron oxide, and the component D contains carbonate, citric acid and auxiliary materials. The flocculant is easy to store, does not need to be compounded on site, flocculates quickly in water, only needs 60-120 seconds in flocculation time, and has an excellent flocculation effect; the emergency requirement of an accident site can be met, and the good popularization value is achieved; the method is suitable for an oil-containing sewage system with coexistence of anions and cations, can also adapt to a wide pH range, is good in salt resistance and has a good dehydration and filtration aiding effect.

The invention discloses application of a sorghum SbMyb1 gene to regulation and control of grain yield, tannin and anthocyanin, and relates to the field of plant genetic engineering. The invention specifically discloses an application of a SbMyb1 gene or a related biological material thereof in regulation and control of plant economic traits. Experiments prove that the SbMyb1 gene encoding the protein with the amino acid sequence shown as SEQ ID NO: 2 can negatively regulate and control yield-related traits such as grain length and grain weight and positively regulate and control the content of secondary metabolites such as grain tannin and anthocyanin, has a good application prospect in high-yield, high-quality and stress-resistant molecular design breeding, and has a wide application prospect. And a new research thought is provided for the SbMyb1 gene to participate in the grain development process through the function exertion of the MBW complex.

The invention discloses an arsenic-containing copper-zinc polymetallic ore beneficiation method and an arsenic-containing mineral inhibitor, and belongs to the field of beneficiation. The arsenic-containing mineral inhibitor comprises the following components by mass percent: 40-60% of lime; 30%-40% of ferrous cyanide salt; and 10%-20% of a sulfomethylation modified tannin extract. The sulfomethylation modified tannin extract is prepared from the following raw materials in percentage by mass: 40-60% of tannin extract; 10-20% of sodium hydroxide; 15 to 25% of formaldehyde; and 5-15% of sulfuric acid. According to the method, the lime, the ferrocyanide and the sulfomethylation modified tannin extract are innovatively compounded according to a specific proportion and are in mutual synergistic interaction, the selectivity of arsenic mineral inhibition can be effectively improved, the agent dosage is reduced, the long-term effect of inhibition is enhanced, deep arsenic reduction can be achieved in the mineral separation process, and the concentrate quality and the recovery rate are improved.

The invention discloses a method for preparing a polyvinyl alcohol flame-retardant film by using walnut green seedcase carbon dots and application of the polyvinyl alcohol flame-retardant film, and belongs to the technical field of composite materials. The preparation method of the flame-retardant film comprises the following steps: mixing a walnut green seedcase carbon dot solution with polyvinyl alcohol, carrying out oil bath heating treatment, cooling to room temperature, carrying out film forming on the obtained walnut green seedcase carbon dot-polyvinyl alcohol mixed solution in a casting manner, and finally, carrying out drying treatment to obtain the target flame-retardant film. According to the method, the walnut green seedcase is used as a raw material to prepare the carbon dots, hydrolytic tannin and quercetin components contained in the walnut green seedcase are fully utilized, resource recycling of waste is achieved, and the production cost of the flame-retardant film is remarkably reduced. The prepared flame-retardant film has the characteristics of portability and certain mechanical strength, is suitable for various scenes with requirements on light flame-retardant materials, has an excellent flame-retardant effect, can effectively delay or even block flame diffusion, and greatly improves the use safety of the materials.

The invention relates to a cationic tannin and prolamin composite nano system and a preparation method and application thereof.The cationic tannin and prolamin composite nano system is prepared through the steps that cationic tannin and prolamin are dissolved in an alcoholic solution through an anti-solvent dispersion method, then the alcoholic solution is dropwise added and dispersed in water, and the cationic tannin and prolamin composite nano system is obtained. Nano-particles are formed through self-assembly under the interaction of non-covalent acting force between cationic tannin and prolamin in an aqueous solution, and the composite nano-system is applied to water treatment. Compared with the prior art, the water treatment agent is good in storage stability and has excellent performance of removing antibiotic pollution in a water body.

The present invention relates to the technical field of traditional Chinese medicine extraction and detection, and particularly relates to an extraction method for tannin fractions in fresh Terminalia chebula, an extraction and purification method for tannin compounds, and a detection method. The extraction method for tannin fractions in fresh Terminalia chebula provided by the present invention uses fresh Terminalia chebula fruits as raw materials, and successively performs stone removal, water-added juicing, and ultrasonic extraction, which can not only avoid the degradation of tannic acid, but also obtain an ideal extraction rate, and has a simple process, low energy consumption, and short time consumption. The present invention also provides an extraction and purification method for tannin compounds. Through macroporous adsorption resin elution, alcohol precipitation, octadecylsilyl reverse-phase packing column elution, and preparative chromatography separation, high-purity chebulic acid, gallic acid, 4-galloylshikimic acid, and 5-galloylshikimic acid can be obtained. The detection method provided by the present invention can detect more than ten tannin components, has high efficiency, and helps to provide data support for the in-depth study of tannin components in Terminalia chebula.

The invention discloses a method for extracting an anti-aging component camellia saponin A from camellia on the basis of a full-bionic targeted extraction technology and application of the anti-aging component camellia saponin A. Efficient enrichment and structure protection of the camellia saponin A are achieved by simulating the whole process of decomposition and absorption of the oral cavity, the stomach and the intestinal tract of a human body. Specifically, the camellia flowers or leaves are pretreated through supercritical extraction, lipid and gel impurities which are contained in the camellia flowers or leaves and are prone to forming gelatinoids are removed, and convenience is provided for subsequent purification; the problems that the camellia saponin A is low in yield and easy to degrade are solved by applying a full-bionic enzymolysis technology, and meanwhile, impurities such as lipid, protein, tannin and sugar can be degraded through full-bionic extraction, so that convenience is provided for subsequent crystallization; and purifying by adopting a macroporous resin adsorption technology, and finally purifying by crystallization. The camellia saponin A obtained by the invention can better achieve the effects of improving wrinkles, repairing skin, brightening skin color and delaying senescence through multi-way and multi-azimuth anti-wrinkle, repairing and whitening effects, and can be widely applied to various types of cosmetics.

The present disclosure provides compositions and methods for producing condensed tannins in maize. The present disclosure further provides maize plants, seeds, cells, and plant parts comprising increased catechin based proanthocyanidins or increased condensed tannins. Aspects of the disclosure further relate to methods for producing, growing, and breeding modified maize plants.

The invention discloses a tenuilia microspora NB1-3, a leavening agent and application of the tenuilia microspora NB1-3 in preparation of caragana microspora and moringa oleifera fermented protein feed. The strain is classified and named as nicotiana microspora, and is preserved in the China Center for Type Culture Collection (CCTCC), and the preservation number is CCTCC NO: M 20251872. The core of the method is that crude fibers and antinutritional factors (tannin and phytic acid) in moringa oleifera and caragana microspora are efficiently degraded by utilizing a strong lignocellulose degrading enzyme system of the tenuilia microspora NB1-3, and meanwhile, the crude protein content of the feed is increased. The prepared fermented protein feed is high in crude protein content and low in crude fiber content and meets the protein feed standard, efficient and high-value utilization of woody plant resources such as caragana microphylla and moringa oleifera is achieved, and a new high-quality and economical protein feed source is provided for animal husbandry.

An object of the present invention is to provide a tea beverage having both a tea-like taste and a fruity aroma while containing tannin and catechin at low concentrations, a method for producing the same, and the like.SOLUTION: A tea beverage having a tannin concentration of 330mg / L or less, a caffeine concentration of 80mg / L or less, and a fruity aroma, wherein the tea beverage satisfies at least one of the following conditions (i) and (ii): (i) a roseoxide concentration of 0.0001 to 5ppm; and (ii) a citronellol concentration of 0.0001 to 10ppm.SELECTED DRAWING: None

The invention discloses application of a vegetable tannin extract in promoting efficient utilization of carbon and nitrogen nutrients of a hermetia illucens culture substrate and reducing emission. The application comprises the following steps: inoculating hermetia illucens larvae into a substrate formed by mixing a vegetable tannin extract, animal dung and a carbon-containing material, breeding hermetia illucens under the conditions of constant temperature, constant humidity, light shielding and opening, and collecting hermetia illucens bodies and hermetia illucens sand after the hermetia illucens larvae are bred. The vegetable tannin extract is one or two of a chestnut tree tannin extract and a white hard wood tannin extract. By adding vegetable tannin into a substrate and optimizing the growth conditions of the hermetia illucens and an excrement treatment process, the growth of the hermetia illucens can be promoted, the emission of carbon and nitrogen gas is reduced, the resource utilization efficiency is improved, and the sustainable development is promoted.

The present invention relates to tannin-based heat-expandable microspheres, and also to a process for their preparation. The heat-expandable microspheres comprise a thermoplastic shell surrounding a hollow core, wherein the hollow core comprises a blowing agent, and the thermoplastic shell comprises tannin.

The subject of the invention is a particulate made of particles comprising biochar particles impregnated with a tannin binder. The invention also relates to shaped objects and building materials obtained from a composition comprising an organic polymer and particulates, as well as to methods and uses relating to said particulates.

According to an example aspect of the present invention, there is provided an intumescent fire retardant composition comprising: an acid source comprising or consisting of ammonium phytate; and a carbon source selected from the group consisting of: carbohydrates, chemically modified lignins, tannin, and any combinations and derivatives thereof.

The invention discloses lotus leaf powder as well as a preparation method and application thereof, and belongs to the technical field of deep processing of plant raw materials. The preparation method of the lotus leaf powder provided by the invention comprises the following steps: carrying out enzymolysis on pretreated fresh lotus leaves in a system containing beta-glucosidase, and then carrying out scalding and ice water leaching cooling; the obtained lotus leaf powder has bright emerald green color, and contains more active ingredients such as flavonoid aglycones and nuciferine which are beneficial to human body absorption; moreover, the content of tannin and total flavonoid glycoside in the obtained lotus leaf powder is relatively low, so that the lotus leaf powder has relatively low bitter and astringent taste, and the obtained lotus leaf powder is excellent in mouth feel; meanwhile, the obtained lotus leaf powder also has good capability of improving blood fat; the method can be widely applied to preparation of matcha-flavored food or preparation of functional preparations for improving blood fat.