213 results about "Catechinic acid" patented technology

The invention relates to a composite stopping agent preventing coal spontaneous combustion based on a low-temperature oxidation mechanism of coal, which belongs to the stopping agent preventing coal spontaneous combustion. The composite stopping agent is characterized by comprising the components of catechinic acid, nontoxic phosphite ester, polyethylene glycol 200, lauryl sodium sulfate and solvent-water. The concentration of raw materials in the solvent-water by mass percent is 0.5-1% of catechinic acid, 0.5-1% of nontoxic phosphite ester, 4-7% of polyethylene glycol 200 and 0.5-1% of lauryl sodium sulfate. The stopping agent can not only be in substitution reaction with methyl and methylene in coal to generate stable ether matters, but also be interacted with free radicals of alkyl peroxides generated by oxidization of methyl and methylene in the coal. The free radicals of peroxides are destroyed, so that generation and activity of active groups such as methyl, methylene and the like in coal spontaneous combustion can be inhibited, therefore, the spontaneous combustion character of coal is fundamentally changed and spontaneous combustion of coal is inhibited. Meanwhile, the stopping agent has the physical moisturizing function and can lock water injected in the coal better, so as to prevent coal spontaneous combustion better in the physical inhibition respect.

The invention relates to blend oil containing peony seed oil and the preparation method thereof. The blend oil comprises 20 to 38 percent of the peony oil, 25 to 30 percent of corn germ oil, 25 to 30 percent of peanut oil, 3 to 5 percent of tea-seed oil, 4.5 to 7 percent of wheat germ oil, 0.5 to 2 percent of catechinic acid and 4 to 6 percent of a luffa extract; the preparation method of the blend oil comprises the preparation of peony seed oil, the mixing of the main raw material, the formation of an emulsification system and final formation of a clean and dirty-free blend oil product, wherein the peony seed oil is treated through the combination of sub-critical fluid extraction and molecular distillation technologies, the operating temperature is low, the heating time is short, grease oxidation and rancidity caused by high temperature are avoided, the separating degree and the product yield are higher, and the acid value of the peony seed oil can be lowered through molecular distillation; the blend oil is reasonable and healthy in matching up, the nutrition is balance, the blend oil with high stability and less oil-fume output can be formed, and the health of a cook person can be maintained for a long time.

The invention provides a method for preparing a high-purity theaflavin composite. The method comprises the following steps of: adding a mixture of green tea and catechinic acid into a crude polyphenol oxidase liquid for carrying out in-vitro oxidation; then, extracting the mixture with ethyl acetate; concentrating the extract in vacuum and drying to obtain a theaflavin crude product; dissolving the theaflavin crude product with ethanol water with volume concentration being 20% and then absorbing by using a chromatographic column with absorbing resin till the chromatographic column with absorbing resin is in a saturated state; eluting by using the ethanol water with volume concentration being 20%, and then eluting by using acetone or ethanol water with volume concentration being 60%; concentrating the eluting liquid, namely the collected acetone or ethanol water solution with volume concentration being 60% in vacuum; and obtaining the high-purity theaflavin composite through freeze drying. The method provided by the invention has the advantages of simple process and low cost and avoids using toxic and harmful organic reagents during a production process, thereby being environment-friendly. Furthermore, the high-purity theaflavin composite with different theaflavin components can be obtained by controlling different reaction conditions, so that the product yield is high and the content is high.

The invention discloses a method used for separating and identifying flavonoid matters in tobacco by adopting liquid chromatography-mass spectrography. The method comprises the following steps: a sample is ground and dried, an extractant is added according to the standard that 0.1 ml of the extractant is added into 1 mg of the sample for extraction and centrifugation, a supernatant liquor is collected, water and chloroform are added according to the standard that 0.5 ml of the water and 1 ml of the chloroform are added into 1 ml of the supernatant liquor for centrifugation, and the supernatant liquor is collected for analysis; 153+ and 151- are adopted as characteristic ions for scanning, parent ions are extracted for second level mass spectrum scanning, and an obtained spectrogram is compared with a spectral library to determine a chemical structure and verified through a reference substance; the molecules and ions of the identified matters and myricetin, dihydromyricetin, catechinic acid / epicatechin, daidzein, glycitein and glycyrrhizin / isoliquiritigenin are adopted as characteristic ions for scanning, the molecules and ions of the searched glycosylation flavonoid matters are used as the parent ions for the second level mass spectrum scanning, an obtained spectrogram is compared with the spectral library to determine a chemical structure and verified through the reference substance. According to the invention, the method is suitable for the analyzing and detecting micro even trace flavonoid matters.

The invention discloses a preparation method of a chitosan derivative and application of the chitosan derivative to food preservation. According to the preparation method of the chitosan derivative, the chitosan derivative is obtained by performing reaction on chitosan powder in reaction liquid containing phenolic acid compounds and recombinant bacterial laccase at the temperature of 60 to 85 DEGC for 0.5 to 4 hours; and the phenolic acid compounds are selected from any one of ferulic acid, caffeic acid, chlorogenic acid, trihydroxybenzoic acid, gallic acid, catechinic acid, tannic acid and tea polyphenol. Compared with the chemical method, the preparation method of the chitosan derivative under catalyzed synthesis of bacterial laccase has the advantage of environmental friendliness and is a green production mode. The recombinant bacterial laccase has high heat stability, and catalytic reaction liquid can be reused repeatedly. The chitosan derivative has a good preservation effect invarious foods of fruit and vegetables, meat products, dairy products, grease products and the like.

The invention discloses a selenium-rich natto product, which comprises the following components in parts by weight: 35-50 parts of selenium-rich natto powder, 10-16 parts of phytosterol powder and 10-15 parts of green tea extract powder. The selenium-rich natto powder contains selenium natto kinase with high activity and long lasting time, and organic selenium, thus having an excellent antioxidation effect; phytosterol contained in the phytosterol powder has the effects of inhibiting cholesterol absorption of a human body, promoting katabolism of cholesterol, inhibiting biochemical synthesis of the cholesterol and the like; and catechinic acid contained in the green tea extract powder has the effects of inhibiting blood pressure and blood sugar, reducing cholesterol and low density lipoprotein in blood and increasing the content of high density lipoprotein. According to the selenium-rich natto product, the selenium-rich natto powder, the phytosterol powder and the green tea extract powder are combined in scientific proportion to take effect together in three aspects of inhibiting thrombus formation, improving thrombus dissolution and enhancing the toughness of blood vessels, and therefore, the selenium-rich natto product is capable of effectively preventing cardiovascular and cerebrovascular diseases.

The invention relates to a technology for producing a formaldehyde scavenging agent by using vegetable proteins. The technology comprises the following steps of: hydrolyzing the vegetable proteins by mainly using an oxidation method, and then adding an aldehyde removal additive such as citric acid, catechinic acid, triethanolamine and an active enzyme preparation. The formaldehyde scavenging agent produced by using the vegetable proteins is used for eliminating, adsorbing and decomposing formaldehyde in decorative materials or air.

The invention relates to an extraction method of tea polyphenol, in particular to an efficient and safe tea polyphenol extraction technique free of a heat source and free of an organic solvent. The method comprises the following steps: with fresh leaves as a raw material, cooling, carrying out enzyme deactivation, pulping, soaking, squeezing and filtering to prepare tea polyphenol extract liquid; purifying the tea polyphenol extract liquid by the procedures of high-speed centrifugation, refined filtration, ultrafiltration membrane filtration, reverse osmosis membrane concentration, lignocellulose chromatography and spray drying. The extraction rate of the tea polyphenol which is coarsely extracted from fresh leaves is over 76%; and the purity of the purified catechinic acid powder is 62%.

The invention discloses catechinic acid fiber blended deodorization flame-retardant woven fabric. Raw materials of needed warp and needed weft for weaving comprise, by weight, 29 to 35 parts of syndiotactic polypropylene, 18 to 23 parts of polylactic acid, 8 to 12 parts of polyhydroxybutyrate, 3 to 5 parts of montmorillonoid, 0.02 to 0.05 part of canthaxanthin, 0.4 to 0.8 part of diprophylline, 0.5 to 0.9 part of calcium chloride, 23 to 28 parts of catechinic acid fibers, 25 to 30 parts of reed fibers, 18 to 24 parts of flame-retardant fibers, 17 to 23 parts of Lenzing modal fibers, 19 to 27 parts of zein fibers, 7 to 9 parts of oleic acid polyethylene glycol ester, 10 to 14 parts of ethylene glycol monoethyl ether acetate, 3 to 4 parts of peppermint, 2 to 5 parts of isatis roots, 1 to 3 parts of rheum officinale, 85 to 100 parts of 1-butyl-3-methylimidazolium acetate, 95 to 105 parts of 1-allyl-3-methylimidazolium chloride, 4 to 6 parts of auxiliaries and a proper amount of water. The fabric has the advantages of being resistant to odor, flames and abrasion, capable of absorbing sound and isolating heat and the like.

The invention relates to a self-fragrant natural anti-bacterial deodorizing fiber which is of a skin-core structure and comprises a core layer and a skin layer, wherein the core layer is a high-melting-point polymer, and the skin layer is a low-melting-point polymer. The self-fragrant natural anti-bacterial deodorizing fiber is characterized in that the high-melting-point polymer body of the core layer contains a fragrance slow release body and a natural antibacterial composition; the self-fragrant natural anti-bacterial deodorizing fiber consists of the high-melting-point polymer, the low-melting-point polymer, the fragrance slow release body, the natural antibacterial composition, nano titanium dioxide and a processing accessory ingredient, wherein the natural antibacterial composition is prepared from chitosan, aloe oil, chitin, catechinic acid, tea polyphenol and the like; the fragrance slow release body is a fragrant microcapsule with a cladded shell-core structure. The self-fragrant natural anti-bacterial deodorizing fiber is nonirritant to skin of a human body, is capable of inhibiting invasion and propagation of bacteria, is high in ammonia absorption rate and quite obvious in anti-bacterial, mildew-proof and deodorizing effects, has the characteristics of fragrance release uniformity and long fragrance holding time, and is high in added value of products.

The invention discloses a composition capable of protecting liver. The composition comprises fullerene evenly dispersed in edible oil, and further comprises at least one of vitamin C, vitamin E, catechinic acid, alpha-lipoic acid, anthocyanin, curcumin, carotenoid, plant polyphenolses, plant polysaccharides, animal and plant terpene, plant flavonoid, SOD (Superoxide Dismutase), coenzyme Q10, glutathione, lactoferrin and metallothionein evenly dispersed in the edible oil. The composition effectively protects the liver and reduces the damage of the negative factor on the mouse liver, so that the blood index of the liver function tends to be at the normal range, the excellent effect of scavenging a free radical is achieved, the liver is cleared, and the redox state of the liver is improved.

The invention discloses a quality control method of a peach kernel qi activating decoction composition and belongs to the field of traditional Chinese medicine analysis. The method includes the steps that a peach kernel qi activating decoction fingerprint spectrum is established through high performance liquid chromatography, and chromatographic conditions are characterized in that a chromatographic column adopts octadecylsilane chemically bonded silica as filler; an ultraviolet detector is adopted as a detection instrument, and the detection wavelength of the fingerprint spectrum ranges from 210 nm to 250 nm; the flow rate ranges from 0.9 ml / ml to 1.1 ml / ml, the column temperature ranges from 25 DEG C to 35 DEG C, the detection wavelength ranges from 210 nm to 250 nm, the number of theoretical plates should not be smaller than 3,000 according to calculation of catechinic acid peaks, methyl alcohol serves as a moving phase A, a 0.1% phosphoric acid solution serves as a moving phase B, and gradient elution is carried out according to the following sequence: the gradient condition of elution detection of the fingerprint spectrum is defined in the specification. The fingerprint spectrum comprehensively reflects quality information of a peach kernel qi activating decoction, and therefore the quality of the peach kernel qi activating decoction can be more comprehensively and effectively controlled.

The invention provides a method for detecting tannin substance in salvianolic acid. The method for detecting tannin substance in salvianolic acid comprises the following steps of: firstly, preparing a reference solution; secondly, dissolving salvianolic acid to obtain an unhydrolyzed sample solution before hydrolysis; thirdly, dissolving salvianolic acid and then hydrolyzing, so as to obtain a hydrolyzed sample solution; fourthly, determining gallic acid, catechinic acid and ellagic acid in the unhydrolyzed sample solution, the hydrolyzed sampled solution and the reference solution; and fifthly, comparing chromatograms and judging whether the tannin substance exists in salvianolic acid.

The invention discloses mildew-proof wear-resistant asphalt paint which is characterized by being prepared from the following raw materials in parts by weight: 17-23 parts of E-22 epoxy resins, 6-9 parts of benzyl transparent silicon resins, 8-11 parts of polyether acrylate, 4-7 parts of tetraethylenepentamine, 3-5 parts of tricresyl phosphate, 1-3 parts of nano bamboo fibers, 2-4 parts of zinc chromate, 37-43 parts of modified asphalt, 5-7 parts of modified waste resin sand, 1-2 parts of ammonium bromide, 2-4 parts of fungacetin, 3-4 parts of catechinic acid, 4-6 parts of epoxy linseed oil, 8-11 parts of amyl acetate, 6-9 parts of xylene, 5-7 parts of glycol, 1-2 parts of tri(dioctylphosphoryloxy) titanium isopropoxide and 2-4 parts of powdered aluminum. The mildew-proof wear-resistant asphalt paint is prepared by adding the epoxy resins on the basis of the modified asphalt, so that the characteristics of high corrosion resistance, weather fastness, waterproofness and thermal stability of the pain are ensured; the added tricresyl phosphate has the characteristics of favorable wear resistance, weather fastness, mildew resistance and radiation resistance; and the added modified waste resin sand has favorable fire resistance, antifouling property and anti-ageing property, so that the quality of the paint is improved and the waste is recycled to solve the problem of environment pollution.

The invention provides an alginate dentifrice composition, belonging to the field of personal care products. The alginate dentifrice composition comprises alginate, a zinc ion source, a fluorine-releasing anti-caries agent provided by a nano-scale fluorine-doped zirconia powder, and a desensitizing material provided by a bioactive glass microsphere loading a catechinic acid substance. A method forpreparing the alginate dentifrice composition includes combining the liquid material and the powder material in the raw materials to prepare a mixture, and then combining a surfactant into the mixture, and mixing in a vacuum environment to obtain the dentifrice composition. The astringency of the dentifrice composition is neutralized, and the dentifrice composition can reduce hypersensitivity ofdentin, induce enamel regeneration and enhance porcelain gloss of the tooth surface, relieve oral mucosa, periodontal tissue and pulp damage, and promote formation of prothrombin to reduce bleeding time of gums. The preparation method can promote the phenomenon of agglomeration of anti-caries agent particles and generate tetragonal phase crystals, reduce system energy consumption, increase glass particle loading capacity and hydroxyapatite mineralization production, and improve resource utilization rate and effective yield.

The invention relates to a dyeing method for a textile containing enzymatic tea pigments, belongs to the field of ecological dyeing and finishing of textiles, and aims to apply laccase to preparation of tea pigments of pu'er tea. Tea leaves mainly comprise catechinic acid serving as pigment substances, and the catechinic acid substance contains phenolic hydroxyl which easily generates polymerization, oxidization and condensation. Laccase has a catalytic oxidization characteristic, so that polyphenols substances of catechinic acid generate catalytic reaction to form the tea pigments; the tea pigments can be applied to ecological dyeing for various textiles. By use of the dyeing method, better pigments can be provided for ecological finishing and processing of the textiles, so that the dyeing performance of the ecological textiles can be improved, and the ecological environment protection idea can be met.

The invention relates to a preparation method for lithocarpus polystachyus rehd fermented tea and the lithocarpus polystachyus fermented tea prepared by the preparation method. The preparation method comprises the following steps: carrying out primary pile fermentation, re-kneading, carrying out secondary pile fermentation, steaming and aging. The lithocarpus polystachyus rehd fermented tea prepared by the preparation method provided by the invention has high content of catechinic acid, theaflavin and flavone, so that the lithocarpus polystachyus fermented tea is a good health-care beverage. Furthermore, the lithocarpus polystachyus fermented tea has an excellent tea color forming effect and is high-quality fermented tea.

The invention belongs to the field of traditional Chinese medicine product extraction and separation, particularly relates to an extraction method and application of a red peony synergy whitening extractive, and is used for solving the problems of high content of impurities including pigment and the like and poor whitening effect since the traditional whitening cosmetics in which traditional Chinese medicine extractives are added are generally prepared from traditional Chinese medicine crude extractives. The extraction method of the red peony synergy whitening extractive comprises the following steps: dipping, and carrying out alcohol extraction, concentration, centrifugation and purification to obtain the product. The product contains seven peony monoterpenoid glycoside compounds and four flavonoid compounds, wherein the seven peony monoterpenoid glycoside compounds consist of paeoniflorin sulfurous ester, oxypaeoniflorin, albiflorin std, paeoniflorin, galloyl paeoniflorin, benzoyloxy paeoniflorin and benzoylpaeoniflorin, and the four flavonoid compounds consist of catechinic acid, dihydroquercetin, astragalin and naringenin. The product has a tyrosinase inhibition function, a blood activation function and an oxidation resistance function, and possesses the characteristics of traditional Chinese medicine cosmetic which has a diversity of functional components performing a synergy whitening function.

The invention provides a medicine for reducing the uric acid. The medicine comprises the following components in percent by weight: 10%-40% of catechinic acid, 10%-20% of tea pigment, 10%-20% of tea compound sugar, 5%-20% of theanine, 5%-20% of vitamin C, 10%-30% of procyanidine. The medicine provided by the invention has the advantages that the uric acid is reduced by multiple aspects of inhibiting the activity of xanthine oxidase, directly decomposing the uric acid, improving the kidney function, promoting the excretion of uric acid and protecting the blood vessels and the like, and the harm to the health of a human body is eliminated. Compared with the traditional medicine for reducing the uric acid, the medicine provided by the invention has the beneficial effects that except the function of reducing the uric acid, the effect of inhibiting the activity of the xanthine oxidase is also obviously improved, the blood fat and the kidney function are also obviously improved and no side effect is caused.

The invention discloses a beta-sitosterol type catechinic acid liposolubility antioxidant and a preparation method thereof. The preparation method comprises the steps that butanedioic anhydride and beta-sitosterol react; under the action of a coupling reagent, intermediate products react with catechinic acid with hydroxyl on benzene rings being protected till the reaction is completed; and obtained products are subjected to deprotection, and the beta-sitosterol type catechinic acid liposolubility antioxidant is obtained through posttreatment. The beta-sitosterol type catechinic has a very good liposolubility antioxidant function. The beta-sitosterol type catechinic has a very good antioxygenic property in grease. The beta-sitosterol type catechinic is low in price and suitable for industrialized production and application. Meanwhile, the preparation method for the beta-sitosterol type catechinic is simple in process, simple, practical and suitable for industrialized mass production.

The invention discloses a degradable double J tube. Firstly, methylene diphenyl diisocyanate is completely dissolved in acetone, then polyethylene glycol, corn starch, cellulose, 1-methoxy-2-methyl-1-(trimethylsiloxy) propene, trimethylsilyl trimethylsilyl acetate, trimethylsilyl 3,3-dimethylacrylate, ammonium lactate and a catalyst are added to acetone, and a prepolymer is formed; after completereaction, catechinic acid and lignin are added to a prepolymer solution, a chain extender is added for chain extension again, water washing, alcohol washing and drying are performed, a product obtained after drying and auxiliaries are added to an extruder for extrusion and pelletization, prepared particles are placed in the extruder for extrusion molding, cutting, modification and other treatmentare executed, and a finished product is prepared finally. The prepared double J tube has good degradability and sustainable development is facilitated; the double J tube further has higher tensile strength, bending strength and other mechanical properties, and still has higher tensile strength and bending strength even in the urine environment.

The invention relates to the field of tealeaves processing, in particular to a method for increasing the productive rate of theaflavoin formed by converting catechinic acid in fresh tealeaves. The adopted scheme is as follows: storing harvested fresh tealeaves into a soft sealed bag, carrying out vacuum sealing on the bag (controlling the vacuum degree at minus 0.1MPa to minus 0.01MPa), adequately freezing the fresh tealeaves, warming the tealeaves under an ambient temperature which is more than zero (about 4 to 37 DEG C) for 2 to 15h, and promoting the catechinic acid to be enzymatically synthesized into theaflavin. After the reaction is ended, the high-temperature withered fresh tealeaves can be directly processed into bar-shaped red tea, flat red tea or twisted into coiled red tea; the mass percent of four theaflavin monomers (theaflavin, theaflavin-3-gallate, theaflavin-3'-gallate and theaflavin-3,3'-bi-gallate) in a dry sample of the prepared read tea is more than or equal to 2 percent of the total mass percent.

The invention discloses a separation method of effective components of a sharpleaf galangal fruit aqueous extract, belonging to the field of pharmaceutical analysis. The separation method comprises the following steps: (A) fetching dried sharpleaf galangal fruit, grinding, carrying out reflux extraction with water, combining filtrate, carrying out reduced pressure distillation to obtain extractum, dissolving the extractum into distilled water, respectively extracting by virtue of petroleum ether, ethyl acetate and normal butanol, and recycling solvents, so as to obtain ethyl acetate extract dry powder; (B) dissolving the dry powder obtain in the step (A), filtering, and processing by virtue of a sephadex LH20 gel column, so as to obtain six components from F1 to F6; and (C) carrying out HPLC separation and purification on the components from F2 to F6, so as to obtain compounds including protocatechualdehyde, protocatechuic acid, p-coumaric acid, (-)-epicatechin and (+)-catechinic acid. According to the separation method, the effective active components are separated and extracted from the sharpleaf galangal fruit, the structures of the effective components are further defined, the basis is provided for later medication, and required components can be extracted according to different requirements.

The invention belongs to the technical field of tea leaf deep processing and relates to a tea leaf comprehensive utilizing and deep processing method. The technical problem to be solved by the invention is to provide a tea leaf comprehensive utilizing and deep processing method. The leaf comprehensive utilizing and deep processing method comprises the following steps of: 1, supercritical CO2 extraction; 2, membrane filtration; 3, column chromatography; and 4, high-speed countercurrent separation. According to the invention, multiple components (natural essence, tea polysaccharide, tea pigment, alkaloid, tea polyphenol, catechinic acid, caffeine and the like) in tea leaves are simultaneously extracted through one process flow, and thus the comprehensive utilization rate of tea leaf deep processing is greatly increased.

The invention discloses a livestock and poultry anti-stress feed additive. The livestock and poultry anti-stress feed additive comprises the following components in parts by weight: 2-4 parts of borneol, 3-7 parts of cape jasmine, 3-6 parts of root of common peony, 2-6 parts of the root bark of the peony tree, 2-6 parts of uncaria, 2-5 parts of corydalis tuber, 3-7 parts of cinnabar, 2-5 parts of spina date seed, 3-7 parts of polygala tenuifolia, 3-7 parts of radix paeoniae alba, 4-6 parts of schisandra chinensis, 1-3 parts of aminobutyric acid, 1-3 parts of catechinic acid, 3-6 parts of acanthopanax, 2-4 parts of gynostemma pentaphylla, 3-7 parts of rhizoma atractylodis, 2-6 parts of mangnolia officinalis, 4-8 parts of liquorice, 7-9 parts of honeysuckle, and 0.06-0.08 part of glucose oxidase. The invention further discloses a preparation method of the feed additive. The livestock and poultry anti-stress feed additive disclosed by the invention is a functional feed additive mainly comprising natural medicinal herb components; and therefore, the livestock and poultry anti-stress feed additive not only has better anti-stress effect but also has the advantages of being accurate in curative effect, low in toxic and side effect, convenient to use and low in cost.

The invention relates to a living cell product preservation solution and preparation and using methods thereof. The living cell product preservation solution is prepared from catechinic acid, glucose, human serum albumin, sodium bicarbonate and preservation base fluid. The preservation base fluid is composed of a 0.9% sodium chloride solution and a compound electrolyte solution. The catechinic acid, the glucose, the human serum albumin and the sodium bicarbonate are added into the preservation base fluid, a 0.22-micrometer filter film is used for filtration sterilization, and the living cell product preservation solution is obtained. Living cell product preservation solution resuspension cells are used, the cell concentration is 0.5*10<7>-5*10<7> cells / ml, and normal temperature preservation is carried out for 0-72 h. The living cell product preservation solution can be used for preserving living cells for a long time, and living cells still have high activity and motility rate after being preserved through the preservation solution for 72 h. The living cell product preservation solution can preserve living cells at normal temperature.

The invention discloses a method for producing tea leaves. The method comprises the following steps of pre-cooling the tea leaves to 1-5 DEG C, and cleaning the tea leaves with barley enzyme cleaning liquid; drying by blowing air, deteriorating and reviving at indoor temperature, heavily rolling by using a rolling machine for 30-50min, later gently rolling for 70-90min, then baking at lower temperature and then fermenting at high temperature after rolling; after wetting with steam, respectively extracting flavor at lower temperature and high temperature, and moulding to obtaining the tea leaves. According to the preparation method provided by the invention, tastes of bitter, astringent and cold nature of green tea and aroma and hot nature of red tea are removed, so that original ingredients of the tea, such as tea polyphenol, catechinic acid, caffeine and theanine, arekept as far as possible; meanwhile, pesticide residues on the tea leaves are effectively removed, and effective ingredients of the tea leaves are not damaged; the produced tea leaves are mellow and strong in taste, attractive in color and appearance, and good in color, aroma, taste and shape; and the tea leaves are easily accepted and approved by consumers.

The invention relates to a free radical resistant tobacco mellowing agent and a preparation method and application thereof to threshing, redrying and moisturizing. The mellowing agent comprises prune extract, a complex enzyme preparation and a solvent. The prune extract contains natural antioxidant substances such as ascorbic acid, flavonoid compounds and / or catechinic acid. The complex enzyme preparation is composed of at least two of alpha-amylase, cellulose, acid protease and sucrase. By the mellowing agent, content of free radicals and nicotine in tobacco can be lowered, natural mellowing process of the tobacco is quickened, offensive odor and irritation in raw tobacco are reduced, and accordingly quality of cigarettes is upgraded while safety in cigarette smoking is improved.

The invention relates to a natural antibacterial and deodorizing finishing agent for non-woven fabrics. The formula of the natural antibacterial and deodorizing finishing agent comprises the following components in percentage by weight: 5%-20% of polyoxyethylene sorbitan tristearate, 1%-10% of ester-base quaternary ammonium salt, 5%-20% of a natural antibacterial composition, 5%-9% of polyethylene glycol glyceryl ether, 3%-8% of a fragrant slow-released system and the balance of deionized water, wherein the natural antibacterial composition comprises chitosan, aloe oil, chitin, catechinic acid, tea polyphenol, tea-seed oil, tea saponin, a grape seed extract, citric acid, amino acid chelate, an amino acid derivative and an emulsifying agent. The natural antibacterial and deodorizing finishing agent has no stimulation to the skin of the human body, is capable of inhibiting the invasion and breeding of bacteria and high in ammonia absorptivity and further has outstanding antibacterial and deodorization effects. The natural antibacterial and deodorizing finishing agent has the characteristics that fragrance is uniformly released, the fragrance preservation time is long, and the added value of the product is high.

The invention belongs to the technical field of fine and deep processing of agricultural products, and in particular relates to antioxidative peptide composite coarse food grain protein powder and a preparation method thereof. The preparation method comprises the following steps: preparing protein powder, preparing catechinic acid and egg white antioxidative peptide, preparing mixed powder of coarse food grains, performing mixing and blending, performing sealing and packaging, and the like. The coarse food grain protein powder provided by the invention is fragrance of protein powder and is capable of keeping human food nutrition balance. In addition, the coarse food grain protein powder has antioxidative peptide and a tea leaf extract, namely catechinic acid. The raw material antioxidative peptide has very good bioactivity and can be easily absorbed by human bodies; the catechinic acid can accelerate oxidation of fat in bodies, and has effects of losing weight and preventing obesity; in addition, the catechinic acid and the egg white antioxidative peptide have a synergic function, so that not only is functionality of the protein powder improved, but also the protein powder is relatively balanced in nutrition. The antioxidative peptide composite coarse food grain protein powder is simple in process, low in cost and wide in market prospect.