492 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 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 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 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 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 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 provides a feed premix for improving chicken quality. The fresh-keeping agent is prepared from the following components in percentage by weight: 5%-15% of a flavor enhancing component, 10%-25% of a tenderness improving component, 3%-10% of an antioxidant fresh-keeping component, 2%-3% of a function enhancing component and the balance of a carrier and a diluent, the function strengthening component is prepared from beta-alanine embedded citronella essential oil and konjac glucomannan zymolyte; the flavor enhancing component comprises a rosemary extract, a yeast culture and curcumin in a mass ratio of (2-4): (1-3): 1; the tenderness improving component comprises conjugated linoleic acid, L-carnitine modified by glutamine transaminase and betaine in a mass ratio of (3-5): (2-4): 1; the antioxidant fresh-keeping component is vitamin E and tea polyphenol in a mass ratio of (1-2): 1. Through multi-component synergism and functional targeting optimization, a three-dimensional quality improvement system with enhanced flavor, improved tenderness, oxidation resistance and fresh keeping is constructed, so that the chicken quality is comprehensively upgraded.

The invention discloses a ginseng leaf solid beverage and a preparation method thereof. The ginseng leaf solid beverage is prepared from the following components in parts by weight: 15 to 22 parts of ginseng leaf extract liposome, 12 to 14 parts of ginseng leaf extract, 6 to 8 parts of compound peptide powder, 10 to 14 parts of compound soluble dietary fiber, 0.21 to 0.25 part of taurine, 5 to 7 parts of compound sugar alcohol, 0.2 to 0.4 part of tea polyphenol, 0.4 to 0.6 part of citric acid, 0.1 to 0.3 part of sweetening agent, 0.4 to 0.6 part of edible essence and 0.8 to 1.2 parts of stabilizer. According to the ginseng leaf solid beverage and the preparation method thereof provided by the invention, ginseng leaf active ingredients are introduced in the form of lipidosome powder, and the ginseng leaf active ingredients, the ginseng leaf extract, the composite peptide powder, the composite soluble dietary fibers, a sugar alcohol system and the like are subjected to formula synergy, so that the comprehensive improvement of stable activity, improved taste, stable brewing and dosage form and excellent efficacy is realized; high-value, stable and acceptable application of ginseng, especially ginseng leaf resources, in a solid beverage form is realized, and industrialization is facilitated.

The invention relates to the technical field of novel fertilizers, and particularly discloses an organic water-soluble fertilizer as well as a preparation method and application thereof. The organic water-soluble fertilizer provided by the invention is prepared from the following components: kitchen waste organic mother liquor, an anti-corrosion synergist, a stress-resistant synergist, a growth-promoting synergist, a dispersing agent and polyethylene glycol-400, the kitchen waste organic mother liquor is prepared by sequentially carrying out wet and hot hydrolysis, amylase enzymolysis, protease enzymolysis and lipase enzymolysis on a kitchen waste solid phase and a kitchen waste liquid phase; the preservative synergist is prepared by mixing a natamycin solution, tea polyphenol and chitosan oligosaccharide; the stress-resistant synergist is prepared by mixing complex enzyme glycoside, a plantain herb extract and gamma-aminobutyric acid; the growth promoting synergist is formed by mixing mineral source potassium fulvate and gluconic acid. The organic water-soluble fertilizer prepared by the invention has good corrosion resistance and product stability, has a good growth promoting effect on crops, and can reduce the number of diseased plants with successive cropping obstacles and improve the yield of the crops in a soil environment with successive cropping obstacles.

The invention relates to a silk fibroin-containing composition as well as a preparation method and application thereof, and belongs to the technical field of cosmetics. The composition provided by the invention comprises silk fibroin-tea polyphenol powder, myrothamnus flabellifolia leaf extract, alfalfa extract and hydrolyzed yeast protein, and the silk fibroin-tea polyphenol powder is prepared by grafting two tea polyphenol components, namely EGCG and ECG, onto silk fibroin, so that the original effects of the silk fibroin are retained, and meanwhile, the content of the tea polyphenol components in the silk fibroin-tea polyphenol powder is increased; and the application stability of the silk fibroin in the product can also be improved. Besides, the prepared silk fibroin-tea polyphenol powder, myrothamnus flabellifolia leaf extract, alfalfa extract and hydrolyzed yeast protein are reasonably compounded to prepare the composition, all the components in the composition have a synergistic effect, and the composition has good anti-inflammatory, soothing and barrier repairing effects.

The invention discloses a polydopamine-tea polyphenol coated copper manganese oxide composite nano-enzyme as well as a preparation method and application thereof, and belongs to the technical field of biomedical materials. According to the invention, a DA-Cu (II)-EGCG (epigallocatechin gallate) complex is formed by virtue of chelation of main components of dopamine and tea polyphenol, namely epigallocatechin gallate, and copper ions; potassium permanganate is introduced for oxidative polymerization to obtain the polydopamine-tea polyphenol / copper manganese oxide organic-inorganic hybrid nano composite material, the nano composite material is monodisperse nano particles, the average particle size is about 80 nm, the nano composite material shows excellent nano enzyme catalytic activity, active oxygen free radicals can be effectively removed, and the nano composite material can be used for preparing nano-enzyme. The material has good photo-thermal conversion performance under near-infrared light, and shows excellent photo-thermal and photodynamic synergistic antibacterial effects. The preparation method disclosed by the invention is simple, mild, environment-friendly, low in cost and convenient for batch production.

The invention relates to the technical field of preparation of cured beef, and discloses low-salt cured beef which comprises main materials and auxiliary materials in parts by mass as preparation raw materials, the main materials comprise fresh yellow cattle meat and compound salt, and the auxiliary materials comprise tea polyphenol, alanine, calcium gluconate and a kelp powder aqueous extract. The formula comprises 100 parts of fresh yellow cattle meat, 5 parts of compound salt, 0.1 part of tea polyphenol, 0.2 part of alanine, 0.5 part of calcium gluconate and 1 part of kelp powder aqueous extract. The method comprises the following steps: putting cleaned beef strips into a microwave oven, mixing 5% of compound salt with tea polyphenol, anthocyanin, rosemary extract, alanine and calcium gluconate in order to improve the pickling efficiency, adding 50 parts of clear water, and uniformly stirring to prepare a pickling solution; and cooling the fried cured beef to room temperature, packaging with a vacuum packaging bag, and carrying out ultrahigh pressure treatment (300MPa, 5 minutes) to replace irradiation, prolong the shelf life and retain the flavor, so that the method has the advantages of traditional flavor, prolonged shelf life, simple production process and the like.

The invention discloses a multi-enzyme compound noodle stretching agent and application thereof, and belongs to the technical field of food additives. The multi-enzyme compound noodle stretching agent is prepared from the following components in parts by mass: 1 to 10 parts of papain, 1 to 10 parts of trypsin, 1 to 10 parts of glucose oxidase, 1 to 10 parts of lipase and 10 to 30 parts of tea polyphenol. Through the synergistic effect of multienzyme compounding and tea polyphenol, the dough structure and the noodle processing performance are improved, the protein depolymerization and crosslinking degree and the protein oxidation degree of the dough can be regulated and controlled at the same time, the dough strength and ductility are considered, the cooking loss is reduced, meanwhile, the green and natural characteristics are kept, no chemical modifier is added, and the production cost is reduced. And the limitation of the existing single enzyme or chemical modifier is overcome, so that the method has a relatively good application prospect in the technical field of food additives.

The application discloses a 3D printing method of a citrus sac non-homogeneous distribution tea snack, and comprises the following steps: first, preparing a protein polysaccharide gel with thermal reversibility to facilitate the mixing and uniform dispersion of non-homogeneous materials; based on the thermal reversibility of polysaccharide, a recyclable protein polysaccharide 3D edible ink is developed; second, through high-speed homogenization or ultrasonic vacuum-assisted immersion of ascorbic acid and tea polyphenol, the citrus sac is subjected to osmotic dehydration treatment, and the size of the citrus sac particles is reduced, and the 3D printing characteristics are improved. Through ultrasonic vacuum-assisted immersion of ascorbic acid and tea polyphenol, the citrus sac not only increases the taste of a mouthful of juice of the tea snack with non-homogeneous distribution of citrus sacs, but also improves the nutritional characteristics of the non-homogeneous printing product containing citrus sacs. In the application, different treatment methods are selected for different size types of citrus sac particles, and the non-homogeneous 3D printing is carried out by matching appropriate printing parameters, so that the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the non-homogeneous distribution of the

The application belongs to the technical field of target material production, and discloses a preparation method of titanium-aluminum target material, which comprises the following steps: first, titanium powder and aluminum powder are weighed according to a mass ratio of 4-5:5-6; then, the titanium powder, the aluminum powder and an antioxidant are put into a mixer to mix and obtain powder I, the antioxidant is at least one selected from stearic acid, sodium phytate and tea polyphenol, and the adding amount of the antioxidant is 0.1-0.5% of the total mass of the titanium powder and the aluminum powder; then, the powder I is ball milled under the atmosphere of nitrogen or argon to obtain powder II, and the ball milling time is 6-12 hours; finally, the powder II is subjected to hot isostatic pressing sintering, and then cooled and discharged from the furnace to obtain the titanium-aluminum target material; through the preparation method, the titanium-aluminum target material with low oxygen content, high density and excellent mechanical properties is obtained; in addition, the application further discloses a titanium-aluminum target material prepared by the preparation method of the titanium-aluminum target material.

The invention provides a formula of low-sugar low-fat Fu tea ice cream containing partridge tea and a preparation process of the ice cream, and relates to the technical field of food processing. Comprising the following raw material components: 20-40 parts of a partridge tea extracting solution, 15-30 parts of a Fuzhuan tea extracting solution, 8-25 parts of a low-fat milk base material, 5-12 parts of a compound sweetening agent, 3-8 parts of dietary fibers and 2-5 parts of prebiotics. The preparation method has the advantages that the mallotus oblongifolius and the Fuzhuan tea extracting solution are in a specific proportion, the taste is improved through the synergistic effect of tea polyphenol, soft taste and rich flavor levels under the conditions of low sugar (less than or equal to 5%) and low fat (less than or equal to 5%) are achieved, low-temperature short-time sterilization and accurate congelation control are adopted in the process, heat-clearing and dampness-removing components of the mallotus oblongifolius and the bacteriostatic and lipid-lowering activity of golden flower of the Fuzhuan tea are effectively reserved, and the mallotus oblongifolius and the Fuzhuan tea are effectively preserved. The product has double health-care effects, solves the problems of high sugar and high fat, function deficiency and single flavor of the traditional tea-flavored ice cream, meets the requirement of healthy consumption, and has remarkable market value of country revitalizing and Hainan local tourism characteristic food.

The invention relates to the technical field of ultraviolet shielding materials, in particular to a preparation method of an attapulgite-loaded cerium metal polyphenol network composite material and ultraviolet shielding application of the attapulgite-loaded cerium metal polyphenol network composite material. The preparation method comprises the following steps: mixing attapulgite with deionized water, and performing ultrasonic dispersion; mixing tea polyphenol and cerous nitrate, adding the mixture into the obtained attapulgite suspension, adding a sodium hydroxide solution, putting the mixture into an ultrasonic kettle, and carrying out ultrasonic treatment; and centrifuging and freeze-drying to obtain the attapulgite loaded cerium metal polyphenol network nano composite material. The attapulgite loaded cerium metal polyphenol network composite material obtained by the invention has a relatively high specific surface area after ultrasonic treatment, the cerium metal polyphenol network is uniformly distributed on the surface of the attapulgite in the form of nanoparticles, and the self-agglomeration phenomenon of the attapulgite is improved by the steric hindrance effect of the cerium metal polyphenol network; and the whole material shows good ultraviolet shielding performance.

The invention belongs to the technical field of food bacteriostatic agents, and particularly relates to a composite natural bacteriostatic agent and a preparation method and application thereof. The bacteriostatic agent comprises the following components in parts by weight: 2-4 parts of garlic powder, 1-3 parts of tea polyphenol and 1-3 parts of pediococcus pentosaceus freeze-dried powder. The natural plant source antibacterial components (garlic powder and tea polyphenol) and the microbial source antibacterial component (pediococcus pentosaceus freeze-dried powder) are scientifically compounded, so that a remarkable antibacterial effect is generated, and particularly, a high-efficiency inhibition effect is achieved on common putrefying bacteria (bacillus subtilis) and pathogenic bacteria (staphylococcus aureus) in meat prefabricated food.

The invention belongs to the technical field of oral care, and discloses a rhodiola rosea-containing composite antibacterial oral bacteriostatic paste, which is prepared by compounding rhodiola rosea, tea polyphenol and other five-compound antibacterial components with sorbitol and other auxiliary materials according to an accurate proportion. According to the invention, a triple system of'instant sterilization-lasting bacteriostasis-ecological restoration 'is constructed, third-party detection shows that the inhibition rate on oral pathogens such as escherichia coli, staphylococcus aureus and the like reaches 99.9% or above, and multiple effects of resisting bacteria, diminishing inflammation, protecting gingiva, preventing caries and the like are achieved. The problems that an existing product is single in antibacterial effect, narrow in antibacterial spectrum and low in rhodiola rosea utilization rate are solved, no heavy metal is detected, stability is excellent, irritation is low, and the rhodiola rosea antibacterial agent is suitable for long-term use and has remarkable innovativeness and industrial value.

A silk fibroin tea polyphenol hydrogel, a preparation method therefor, and use thereof, wherein the silk fibroin tea polyphenol hydrogel is prepared using the following method: (S10) preparation of silk fibroin; (S20) preparation of a silk fibroin hydrogel: irradiating an aqueous solution of SFMA and LAP under ultraviolet light to prepare a SFMA hydrogel; and (S30) preparation of the silk fibroin tea polyphenol hydrogel. During use, TP is injected into a bladder, then the SFMA hydrogel is injected, and photocuring is performed to form the silk fibroin tea polyphenol hydrogel on a bladder wall. The prepared silk fibroin tea polyphenol hydrogel is suitable for use in the treatment of hemorrhagic cystitis, exhibits good adhesion, and has a good hemostatic effect.

The invention discloses a multifunctional nursing sanitary pad for preventing and treating bedsore, and belongs to the technical field of sanitary pads, the multifunctional nursing sanitary pad comprises a sanitary pad body, and the sanitary pad body comprises an adhesive layer, a skin-friendly layer, an antibacterial layer, a temperature control layer, a waterproof layer, a breathable layer and a bottom wear-resistant layer. According to the invention, the skin-friendly layer is made of a natural fiber material and is soft and attached to the skin, so that friction stimulation is reduced; the antibacterial layer is loaded with chitosan, tea polyphenol plant extract and propolis metabolite, has broad-spectrum antibacterial, anti-inflammatory and wound healing promoting effects, and effectively inhibits bacterial breeding and infection; the temperature control layer contains a microencapsulated phase-change material which can absorb, store and release heat, so that the local skin temperature is kept stable, and bedsores caused by local overheating or moisture are avoided; the waterproof layer is made of a polyethylene material, so that seepage is prevented from reversely permeating to pollute skin; the breathable layer is provided with the breathable holes distributed in a net shape, so that air circulation is remarkably improved; the bottom wear-resistant layer is made of polyester fibers, so that the overall structural strength and durability are enhanced.

The invention relates to the technical field of coatings, and discloses a waterproof composite coating for a non-stick pan and a preparation method of the waterproof composite coating, the composite coating sequentially comprises a transition bonding layer, a waterproof blocking layer and a surface non-stick layer from inside to outside, and each layer is prepared from raw materials in a specific proportion. The transition bonding layer takes titanium carbide, potassium feldspar and the like as main raw materials, the waterproof blocking layer comprises bisphenol A epoxy resin, modified tea polyphenol and the like, and the surface non-stick layer takes polytetrafluoroethylene as a core. The preparation method sequentially comprises the steps of substrate pretreatment, transition bonding layer preparation, waterproof barrier layer preparation and surface non-sticky layer preparation, and the process is simple and controllable. The composite coating has excellent waterproof performance, firm binding force with a base body and good non-stick performance, the service life of the non-stick pan can be effectively prolonged, health risks caused by coating damage are reduced, and the composite coating is suitable for large-scale production.

The invention discloses a biological fermentation feed for improving pork quality and a preparation method thereof, and belongs to the technical field of biological fermentation feeds. The biological fermentation feed comprises astragalus membranaceus powder, angelica sinensis powder, pericarpium citri reticulatae powder, codonopsis pilosula powder, liquorice powder, wild chrysanthemum flower powder, hawthorn fruit powder, rhizoma atractylodis powder, cinnamon powder, corn flour, soybean meal powder, bran powder, a bacterium enzyme complexing agent, compound enzyme liquid, compound chlorogenic acid liquid and drinking water. A preparation method of the compound enzyme liquid comprises the following steps: preparing a starch-tea polyphenol inclusion compound, and mixing; the biological fermentation feed prepared by the preparation method disclosed by the invention is not easy to decay when being placed in an open manner, is good in palatability, can greatly improve digestion and absorption of nutrient substances by pigs and improve the quality of pork, and does not need wall breaking treatment in the preparation process.

The invention provides a nano drug-loaded particle based on gamma-polyglutamic acid and epsilon-polylysine, a composite shell is arranged outside the nano drug-loaded particle, the composite shell is formed through a reaction of gamma-polyglutamic acid and epsilon-polylysine, and a single active component is loaded in the composite shell; the single active component is one of salicylic acid, gallic acid or tea polyphenol. The invention also provides a preparation method and application of the nano drug-loaded particle. According to the nanoparticles, a unified ionic crosslinking process is adopted, and three kinds of nanoparticles with gamma-polyglutamic acid and epsilon-polylysine as composite shells and different single active ingredients loaded on inner cores are prepared respectively. The nanoparticles provided by the invention are stable in structure and good in biocompatibility, and can be used for preparing medicines with anti-aging, antibacterial and anti-inflammatory effects respectively or in combination.

The present application provides a composition with lipid-lowering and weight-reducing functions, which has clear components and controllable quality. The composition comprises Pu'er tea extract, wherein the Pu'er tea extract contains 10-90% theabrownine by weight, preferably also contains theophylline, the weight ratio of the theabrownine and theophylline is 10:1-60:1, and contains 0-15% tea polyphenols by weight. The theophylline can be selected from exogenous theophylline or theophylline contained in the Pu'er tea extract. The composition with lipid-lowering and weight-reducing functions of the present application also comprises Poria cocos extract; the weight ratio of the Pu'er tea extract to the Poria cocos extract is 1:3-3:1 based on the weight of theabrownine contained in the Pu'er tea extract. The composition of the present application has the advantages of clear effective components, simple preparation process, controllable quality, and stable lipid-lowering and weight-reducing effects.

The invention discloses steady-state tea-fragrance low-salt cured beef and a preparation method thereof, and relates to the field of food. In order to solve the problems of non-uniform permeation of tea fragrance, serious loss in processing and storage processes and imbalance between the tea fragrance and the original taste of beef in the tea-flavored cured beef, the low-salt cured beef comprises 1000 parts of beef, 2-5 parts of a Yunnan black tea compound, 20-30 parts of compound salt, 0.05-0.15 part of a bacteriostatic agent, 1.5-2.5 parts of a fermentation inoculant and 0.3-0.8 part of an auxiliary material. According to the invention, a Yunnan black tea functional compound formula system is combined with a three-stage gradient targeted pickling process and a gradient temperature-control humidity-control air-drying fermentation process to prepare the cured beef. Through precise matching of sequential auxiliary material addition and process parameters, the purposes that the salt addition amount is reduced by 40% or above compared with a traditional process, the tea polyphenol processing retention rate and the viable count content of probiotics in a final product are remarkably increased, the production period is shortened compared with the traditional process, and the defective rate is reduced are achieved. The product has health properties, harmonious flavor and excellent shelf life stability, and is suitable for industrial large-scale production.

This application belongs to the field of biomedicine, specifically relating to a method for preparing an antitumor composition for pets, aiming to solve the technical problems of low bioavailability, poor stability, and poor drug administration compliance of poorly soluble active ingredients in antitumor drugs for pets. The method includes: a raw material pretreatment step, in which curcumin, resveratrol, quercetin, green tea polyphenols, and astragalus polysaccharides are pulverized and sieved separately; an organic phase preparation step, in which egg yolk lecithin and solid lipids are dissolved in an ethanol-acetone mixed solvent, and curcumin and resveratrol are added and dissolved by stirring in a water bath; an aqueous phase preparation step, in which poloxamer F68 is dissolved in purified water and dissolved in a water bath; a high-pressure homogenization step, in which a nanoemulsion containing a solid lipid core is prepared; a moderately polar component encapsulation step, in which quercetin and green tea polyphenols are ultrasonically dispersed and then added dropwise to the nanoemulsion; a freeze-drying step, in which a nano-lyophilized powder is obtained; and an outer hydrophilic component coating step, in which astragalus polysaccharides are sprayed or adsorbed onto the surface of the freeze-dried powder. The composition obtained by this method is a core-shell multilayer nanoparticle with a core consisting of curcumin and resveratrol encapsulated by solid lipids, a middle shell adsorbing quercetin and green tea polyphenols, and an outer shell coated with astragalus polysaccharides. This application utilizes the above-mentioned layered encapsulation technology to achieve stable co-encapsulation of multiple antitumor active ingredients, improve the bioavailability of poorly soluble components, optimize drug stability, and enhance antitumor effects through multi-target synergistic effects. Simultaneously, it endows the composition with immunomodulatory functions and sustained-release properties. The composition can be formulated into a nano-lyophilized powder form, making it easy to add to pet food or formulate into a paste for administration, improving pet drug compliance. Figure 2 is a schematic diagram of the three-layer core-shell nanoparticle structure of the composition of this invention.

The application discloses a black tea hotpot small noodle and a preparation method thereof, and belongs to the field of instant food processing. The small noodle comprises hot air dried instant noodle, Chongqing old hotpot condiment and vegetable bag; instant noodle raw materials contain black tea and noodle liquid, acetic ester starch and hydroxypropyl starch; the hotpot condiment contains Jinjunmei tea leaves; during preparation, noodles are made of black tea and noodle liquid; when the condiment is fried, tea oil inclusions are prepared by mixing and infiltrating Jinjunmei black tea extraction liquid and vegetable oil, the tea oil inclusions are added when the temperature is lowered to 85-90 DEG C in the late frying stage, and the tea oil inclusions are added in batches. The application significantly improves the rehydration of non-fried noodles by the cooperation of double modified starch and trehalose, prevents the paste soup and oxidation of tea polyphenols, simultaneously innovatively adopts the tea oil embedding and batch fragrance extraction process, deeply fuses the black tea aromatic substances and the beef tallow fragrance, effectively neutralizes the spicy and greasy, and the flavor is harmonious and mellow.

The invention provides a rhizoma bletillae composition as well as a preparation method and application thereof, and relates to the technical field of traditional Chinese medicine preparations. The core effective component of rhizoma bletillae is rhizoma bletillae polysaccharide, the rhizoma bletillae polysaccharide has the effects of film forming, hemostasis, targeted wound repair promotion and infection prevention, tea polyphenol and rhizoma bletillae are compounded for use, the tea polyphenol and rhizoma bletillae synergistically resist inflammation, the expression quantity of proinflammatory factors IL-1beta, TNF-alpha and IL-6 is reduced by inhibiting NF-kappa B and MAPK signal channels, the inflammatory cascade reaction is remarkably blocked, and the anti-inflammatory effect is achieved. Red, swollen and pain caused by inflammation are effectively relieved, and wound healing is accelerated. In addition, the rhizoma bletillae and the tea polyphenol can also generate a synergistic antibacterial effect, and compared with a single rhizoma bletillae component, the probability of wound infection is further reduced; the compounding use of the rhizoma bletillae and the tea polyphenol also inhibits the excessive deposition of collagen, reduces the scar area, reduces the scar hyperplasia degree, and makes up the blank of only promoting healing and not preventing scars for burns and scalds in the prior art.

The application belongs to the technical field of wood modification, and particularly relates to chitosan-tea polyphenol modified flame-retardant hydrophobic modified wood and a preparation method thereof. The preparation method of the chitosan-tea polyphenol modified flame-retardant hydrophobic modified wood provided by the application adopts a layer-by-layer self-assembly impregnation mode, and fast-growing wood is respectively impregnated in a chitosan solution and a tea polyphenol solution, and after drying, the surface of the fast-growing wood is electrostatically adsorbed with chitosan and tea polyphenol to form a hydrophobic flame-retardant surface, so that a material with hydrophobic and flame-retardant double characteristics can be obtained without subsequent surface energy material or other flame retardant modification. Moreover, the preparation process and principle of the application are simple, the raw materials are widely sourced, green, environmentally friendly and renewable, the texture characteristics of the wood itself can be retained after modification, the color is natural and beautiful, and the application has extremely competitive industrialized production feasibility in the field of high-quality modified wood preparation.