50results about How to "Strong antioxidant capacity" patented technology

The invention discloses a detergent for tableware, fruits and vegetables and a preparation method thereof. According to a composing prescription, ginger extract is used to remove oil stains, peculiar smells and bacteria on the tableware, and microorganisms, worm eggs, ash fouling, and the like on the surfaces of the fruits and the vegetables; and meanwhile, surfactant components such as glucoside and coconut oil derivatives are used by the detergent, so that that detergent is safe for human bodies, cannot irritate skin and is harmless to the environment. The detergent has the advantages of reasonable formula, simple process and obvious use effect.

The present invention relates to a chain cleaning composition and a preparation method thereof. The chain cleaning composition provided by the invention comprises the following components by weight: 50-70% of a base fluid, 2-7% of an antioxidant, 1-5% of an extreme pressure anti-wear agent, 1-5 % of an ashless rust preventive agent, 0.5-5% of a metal deactivators, 15-30% of a lytic agent and 8-20% of a tackifier, wherein the total weight of the components is 100%. The composition provided by the present invention can conduct on-line cleaning of can chain stubborn sludge, carbon deposits, varnish and other colloidal material on chain surface, and can quickly penetrate into the chain pin and shaft sleeve for cleaning. The chain cleaning composition has excellent extreme pressure anti-wear performance, biodegradable properties and lubricating performance, improves the solubility of sludge substances, and has certain rust protection effect on the chain in the cleaning process.

The invention relates to a natural compound preservative for food, which is composed of the following components by weight percent: 20-30 percent of onion extract, 15-25 parts of cumin extract, 20-30 percent of tea polyphenol and 25-35 percent of bee propolis, and the sum of weight percentage of the components is 100%. The natural compound preservative has the advantages that the components are cooperatively used, so that the synergistic effect is realized; the continuous preservative effect is achieved, the preservative effect is good, the composition adopts natural ingredients, is safe and has no toxic or side effects, the preservative comprises multiple nutrient elements without antioxidant function, and the dosage is scientific, so that the preservative is an antioxidant which is nutritionally valuable for a human body, and is suitable for food such as salted products, meat, grease and aquatic products.

The invention relates to a method for controlling the browning of chestnuts, which comprises the following steps: peeling the chestnuts; putting peeled chestnut kernels into a prepared color protecting liquid for soaking, wherein the color protecting liquid is tea polyphenol, kojic acid, L-glutathione or L-tartaric acid, or the combination of all the materials; and rinsing off the color protecting liquid on the surfaces of the chestnut kernels. The whole bodies of the chestnuts are golden or yellowish-white after the treatment, and the surfaces are shiny without off flavor. The dosage of an anti-browning agent (the color protecting liquid) used in the method is a little, and the anti-browning agent is safe and non-toxic, and can be widely applied to chestnut producing and processing enterprises.

The invention discloses Xylariaceae and a culturing method of the Xylariaceae. The Xylariaceae is Xylariaceae sp.HMGIM-130277, and is assigned with the accession number of CCTCC M2015746; the artificial culturing method comprises the following steps: preparing a mother strain, preparing a producing strain and carrying out fruiting management. The Xylariaceae sp.HMGIM-130277 provided by the invention is collected from dead broadleaf wood in the Rainforest Valley of Hainan Jianfengling National Natural Reserve, the invention further provides a corresponding artificial cultivating method, the large-scale stable production is facilitated, and good economic benefit and social benefit are obtained.

The invention provides a metal-film filtering screen and an air purifying device, and relates to the field of air purification. The metal-film filtering screen is mounted in an air filtering device; the air filtering device is provided with an air inlet and an air outlet; the metal-film filtering screen comprises a medium-efficiency filtering screen and a high-efficiency filtering screen. The medium-efficiency filtering screen more approaches the air inlet relative to the high-efficiency filtering screen; the medium-efficiency filtering screen and the high-efficiency filtering screen both comprise multiple layers of filtering plates; a gap exists between two adjacent layers of the filtering plates; the filtering plates are provided with multiple filtering holes; the filtering plates are made from intermetallic compounds. As the filtering screen is made from a special intermetallic compound, the purification effect is good; a material is quite environment-friendly; moreover, the metal-film filtering screen can be circularly rinsed and repeatedly used; after a client purchases a fresh air ventilator with the filtering-screen material, no any consumable-material expenses exist. In this way, the fussy consumable material replacing action is virtually decreased for the client; meanwhile, the cost is also greatly saved for the client.

The invention discloses synbiotics for enhancing health of breast-feed calf and a preparation method thereof and belongs to the field of feed additives. The synbiotics are prepared by compounding a Chinese herbal medicine acanthopanax extract and feeding microbes, wherein a mass ratio of the Chinese herbal medicine acanthopanax extract to the feeding microbes is (1-1.5): (3.5-4). The feeding microbes are prepared by mixing the following microbes in parts by mass: 25-30 parts of lactobacillus (Lactobacillus), 25-30 parts of bacillus subtilis (Bacillus subtilis), 25-30 parts of bacillus cereus (Bacillus cereus) and 15-25 parts of saccharomyces cerevisiae (Saccharomyces cerevisiae). The acanthopanax synbiotics are applied to the 5-21-day-old calf, the weight and body size of the calf after weaning are superior to those of conventional calf in the suckling period, and healthy growth and development of the calf are guaranteed.

The invention relates to a method for improving tobacco seed storage durability. The method for improving tobacco seed storage durability specifically comprises the following steps: pressing tobacco seed oil by adopting a physical pressing method; immersing tobacco seeds in the tobacco seed oil, performing uniform agitation and soaking the seeds for 2h; removing excessive oil on the tobacco seeds by adopting a centrifugation method, transferring the tobacco seeds into a storage container, and placing and storing the storage container a low-temperature and dry environment. By adopting the technical scheme, the fission rate of the tobacco seeds can be effectively reduced, the contact between the seeds and oxygen in air is reduced, the respiratory metabolism of the tobacco seeds is reduced and the storage durability of the tobacco seeds is improved; the tobacco seed oil does not influence the biological character of the tobacco seeds and the storage of the tobacco seeds is facilitated.

The invention discloses a high-performance perovskite solar cell. The solar cell structure sequentially comprises a conductive substrate, an electron transport layer, a perovskite light absorption layer, a hole transport layer and an anode layer from bottom to top, wherein the perovskite light absorption layer contains an additive; the additive is one of 2,6-ditert-butyl-4-methylphenol, acesulfamepotassium or sodium cyclamate; the additive is added to a perovskite precursor solution; the dosage of the additive accounts for 5-30% of total mass of the perovskite precursor solution; and the thickness of a thin film of the perovskite light absorption layer is 300-500nm. According to the high-performance perovskite solar cell, the film-forming quality of perovskite is improved through adding the additive, and holes are reduced, thereby reducing recombination of photoelectrons, improving the photoelectric property of the perovskite and obtaining the perovskite solar cell with high current density and high efficiency; and the high-performance perovskite solar cell has the advantages of being mild and controllable in condition, simple in preparation, low in cost and suitable for large-scale commercial production.

The invention discloses a method for enriching carrot with multi-trace elements. The method comprises at least one of the following measures: 1. spreading trace element nutrient solution around the root of each carrot seedling based on 300 to 400ml per seedling after the carrot is subjected to final singling of seedling for 7 to 10 days, wherein the trace element nutrient solution is diluted 500 to 750 times by clean water; then spreading the trace element nutrient solution to the root of each carrot seedlings seven to ten days later based on 400 to 500ml per seedling; and managing according to conventional methods, thus obtaining the carrot rich in multi-trace elements, wherein the trace element nutrient solution is the ion nutrient solution fertilizer specified by claim 1 under application number of 201210053105.4; and 2, spraying the trace element nutrient solution which is diluted 300 to 500 times by clean water for 2-3 times every 7-8 days by adopting the foliar spray method in the normal growing and increasing stage of the carrot, and the last spraying is carried out above 20 days before the harvesting time of the carrot; and managing according to conventional methods.

The invention discloses an oxidation-resisting flexible NdFeB pasting magnetic stripe and a preparation method thereof. The preparation method of the oxidation-resisting flexible NdFeB pasting magnetic stripe mainly comprises the step 10 that magnetic powder is prepared, the step 20 that the granularity of the magnetic powder is regulated, the step 30 that surface pretreatment is conducted on the magnetic powder, the step 40 that the magnetic powder integrates with a binder, the step 50 that the flexible NdFeB pasting magnetic stripe is formed, the step 60 that protection on the surface of the oxidation-resisting flexible NdFeB pasting magnetic stripe is conducted, and the step 70 that magnetizing is conducted on the oxidation-resisting flexible NdFeB pasting magnetic stripe. The oxidation-resisting flexible NdFeB pasting magnetic stripe mainly comprises the magnetic powder, the binder and a coupling agent and is prepared by the preparation method. The oxidation-resisting flexible NdFeB pasting magnetic stripe has the advantages of being capable of effectively resisting oxidation and improving the magnetic performance of a magnet.

The invention discloses a method for preparing a microbial food antioxidant. The method comprises the following preparation steps: (1) culturing rhodopseudomonas palustris, saccharomyces cerevisiae, tea yeast and lactobacillus bulgaricus, and mixing the cultured strains to prepare strain stoste; (2) mixing the strain stoste with a culture medium, and fermenting, centrifuging and sterilizing the mixture to obtain microbial food antioxidant fermentation broth; and (3) mixing a rosemary extract and resveratrol alcohol with the obtained microbial food antioxidant fermentation broth according to a proportion, dispersing and stewing to prepare the microbial food antioxidant.

The invention relates to a storage, fresh-keeping and processing method of Chinese toon. The fresh-keeping method comprises the following steps of performing sorting, performing cleaning, performing blanching in a sodium bicarbonate solution, performing soaking in a pretreating agent, performing fresh-keeping treatment, performing refrigeration for the first time, performing refrigeration for the second time, and performing refrigeration for the third time. The method for processing the Chinese toon prepared by the storage and fresh-keeping method comprises the following steps of performing cooking, performing cooling, performing spin-drying, performing boiling, and performing mixing with other raw material components. The made Chinese toon maintains deep green, active substances in the Chinese toon are effectively released, the nutrient components are rich, and the content of nitrite is low.

The invention discloses a method of producing pig feed with kitchen waste. The method comprises the following steps of: step I: separating, filtering, grinding and drying the kitchen waste, step II: mixing and sterilizing a raw material, step III: adding 10-15% of complex inoculant into the raw material under a nitrogen condition at 28-36 DEG C, performing intermittent stirring and fermentation for 20-36h to form roughage, and step IV: mixing 0.6-1.0% of monocalcium phosphate and 0.1-0.2% of Chinese herbal medicine antibiotic into the roughage for granulation to form the pig feed. The Chineseherbal medicine antibiotic comprises the following ingredients in parts by weight: 20-30 parts of berberine hemisulfate salt, 12-16 parts of allicin, 18-24 parts of aloe-emodin, 15-19 parts of sodiumhouttuyfonate and 0.05-0.09 parts of propylgallate. The method can efficiently utilize the kitchen waste; the produced pig feed is strong in stability and has low deterioration possibility; and Chinese herbal medicine ingredients in the feed can obviously improve appetite, immunity and disease resistance of a pig, further increases a survival rate and a yield of the pig and improves pig meat quality.

The invention relates to the field of cosmetics, in particular to a camellia oil-contained skin barrier repairing micro-nano emulsion and a preparation method therefor. The skin barrier repairing micro-nano emulsion comprises the following ingredients, 10-50 wt% of camellia oil, 0.1-5 wt% of ceramide, 0.05-3 wt% of cholesterol, 0.03-2 wt% of fatty acid, 1-10 wt% of water, 1-10 wt% of phospholipidand the balance glycerin; the preparation method comprises the following steps of mixing the glycerin with the water, and adding the phospholipid and performing uniform swelling to obtain a phase A; mixing the ceramide with the cholesterol, the fatty acid and the camellia oil, and performing stirring until solutes dissolve to obtain a phase B; and mixing and homogenizing the phase A and the phaseB to obtain a pretreatment solution, performing high-pressure homogenization on the pretreatment solution, and performing discharging and cooling to obtain the camellia oil-contained skin barrier repairing micro-nano emulsion. The nano emulsion prepared by the preparation method has a good skin barrier repairing effect, and has a faster repairing rate; and the entire emulsion has high stability and water dispersibility, and is conveniently matched and mixed with the remaining components.

The invention discloses an aluminum alloy surface modification method which comprises the following steps: (1) respectively weighing Cr, Ti, Si, V and Al powder; (2) mixing the powder weighed in the step (1); (3) preparing a polyvinyl alcohol solution of which the concentration is 4%; (4) grinding the surface of an aluminum alloy plate and washing; (5) blending the powder mixed in the step (2) into paste by using the solution prepared in the step (3), and pre-coating the paste on the aluminum alloy plate treated in the step (4); and (6) radiating the preformed coating on the aluminum alloy plate. The method disclosed by the invention can be used for preparing a coating which is high in hardness, good in wear resistance and oxidation resistance and high in metallurgical binding force on an aluminum alloy surface.

The invention discloses a sealing rubber for an aeronautical sealing ring. The sealing rubber comprises the following components in parts by weight: 35-40 parts of polyurethane rubber, 15-20 parts ofsilicon rubber, 10-20 parts of acrylate, 6-14 parts of nanocarbon, 12-18 parts of bisphenol A epoxy resin, 20-35 parts of filler, 20-30 parts of silane-modified polyether polymer, 10-15 parts of tackifier, 1-3 parts of wear-resistant carbon black, 3-8 parts of castor oil, 18-24 parts of 1,4-butanediol, 1-8 parts of dioctyl phthalate, 0.5-3 parts of vulcanizing agent and 20-30 parts of plant extracts. Compared with the prior art, the sealing rubber for the aeronautical sealing ring, disclosed by the invention, is strong in adhesive force, resistant to strip at high pressure, high in oxidation resistance and suitable for use as an aeronautical material.

The invention relates to a method for removing iron impurities and gathering cupric ions in a copper sulfate solution. The method includes the steps of adding a strong acid cation exchange resin column to a copper sulfate crude solution for removing iron; adding a macroporous strong acid cation exchange resin column to the copper sulfate solution with low iron content for adsorbing and gathering all cupric ions; backwashing for desorption with sulfuric acid after cupric ions adsorbed by the macroporous strong acid cation exchange resin are saturated, wherein the desorbed macroporous strong acid cation exchange resin can be recycled. The method for removing the iron impurities and the gathering cupric ions in the copper sulfate solution is simple in technology, short in process, high in copper extraction rate, low in production costs and capable of achieving the purpose of copper gathering as well as iron removing, the obtained copper sulfate solution is high in purity, the strong acid cation exchange resin and the macroporous strong acid cation exchange resin can be recycled, and the entire process is environmentally friendly and pollution-free.

The invention discloses a special clinic nutrition composition for promoting milk secretion. The composition is prepared from the following ingredients in parts by weight: 5 to 34g of protein, 0.5 to20g of dietary essence, 20 to 30g of dietary fiber, 0.4 to 0.7g of macroelements, 0.01 to 0.04g of microelements, 0.01 to 0.03g of lipid-soluble vitamin, 0.1 to 0.25g of water soluble vitamin, 2.5 to45g of medicine and food homology ingredients, 1 to 5g of probiotics and 1 to 2g of prebiotics. The invention also provides a preparation method of the clinic nutrition composition. The invention provides a special clinic nutrition composition for promoting milk secretion; the regulation of the hypophysis in the body of the breast feeding women on the internal secretion can be realized through thenutrition support; the regulation on the peripheral internal secretion by using the traditional Chinese medicine as the guidance is realized; the day and night internal secretion fluctuation is regulated from the nutrition auxiliary function; through the addition of the proper nutrition substances and nutrition elements, the sufficient energy is supplied for the breast feeding women; the immunityis improved, so that the sufficiency and smoothness of the milk secretion are promoted.

The invention discloses a plant growth nutrient solution. In the plant growth process, various diseases, such as bacterial wilt, banded sclerotial blight, mosaic disease, seasonal febrile diseases and the like, are generated because of factors of replanting in the old soil or the factors of air, running water, plant diseases and insect pests and the like. Especially, plants which are replanted in the old soil are lack of enough protection from plant endogenous hormones and active enzyme, thus the plants can not resist infection and invasion of various germs and viruses. In the plant growth nutrient solution, superoxide dismutase is combined with other plant growth hormones and regulators, and thus the plant growth nutrient solution has strong antioxidant capability and effect on accelerating plant growth. After the plant growth nutrient solution is applied on plants, in-vivo oxygen free radical content is lowered, toxic action on plants by the oxygen free radicals is lightened, the premature senility phenomenon of plants is eliminated, harm on plants by various germs and viruses can be prevented, and the quality and the yield of the plants are improved.

The invention discloses a method for preparing low-oxygen molybdenum and molybdenum alloy clad with Al4SiC4-HfC. The method for preparing low-oxygen molybdenum and molybdenum alloy clad with Al4SiC4-HfC adopts an injection filling method, and specifically comprises that Al4SiC4-HfC powder and a compound binding agent are mixed in a volume ratio of 1:(3-2) into slurry, and the slurry is injected and filled at the periphery of molybdenum and molybdenum alloy powder in a pressing mould with the filling thickness of 1-3mm; pressing at a pressure of 50-100KN is carried out, so that a molybdenum and molybdenum alloy pressed blank clad with Al4SiC4-HfC is formed; then the conventional sintering and annealing are carried out on molybdenum and molybdenum alloy, so that a Al4SiC4-HfC clad low-oxygen molybdenum and molybdenum alloy material is prepared. The prepared Al4SiC4-HfC clad low-oxygen molybdenum and molybdenum alloy material has the advantages of excellent oxidation resistance, long service life, high bonding strength between a cladding layer and a matrix, good compatibility, low cost and simple technology.

The invention relates to a medium composition for preventing magnolia sieboldii bud tissue culture browning and a method. The method comprises the five steps of explant sterilization, medium obtaining through aseptic seedlings, medium subculture and medium rooting and transplanting. According to the culture method, buds are adopted as an explant, cytokinin, auxin, vitamin C, glutathione, sodium benzoate, saccharose and agar are added into a B5 culture medium to form the medium composition for preventing browning, and prevention and control over browning in the magnolia sieboldii bud tissue culture process are achieved. The method is good in repeatability, the bud browning rate is lower than 10%, the rooting rate is 75-80%, the transplanting survival rate is 85-90%, and the method is of great significance in magnolia sieboldii seed quality resource protection and development and utilization thereof.

Herbal mouthwash is characterized in that the herbal mouthwash is prepared by the following raw materials in parts by weight, 6 to 10 parts of folium artemisiae argyi, 4 to 8 parts of common bluebeard herb, 2 to 5 parts of Amygdalus communis L, 4 to 7 parts of mother chrysanthemum, 8 to 12 parts of hydrogen peroxide with the concentration of 5% to 10%, 6 to 9 parts of KOH solution, 5 to 11 parts of xylitol, 7 to 13 parts of lysimachia christinae hance, 12 to 16 parts of folium isatidis, 7 to 10 parts of scutellaria baicalensis, 6 to 9 parts of Phyllanthus niruri Linn , 5 to 8 parts mint leaves, 5 to 10 parts of folium mori and 12 to 16 parts of green tea. The herbal mouthwash has the beneficial effects of high sterilization, high caries resistance and high antioxidation, can effectively inhibit germs, protect cleanliness and health of an oral cavity and is safe without side effects.

The invention relates to a lubricating oil having good oxidation resistance and specially used for dual-fuel engines. The lubricating oil comprises, by mass, 50-63 parts of base oil, 1.5-3.8 parts of nonylphenol polyoxyethylene ether, 1-7 parts of polyvinyl ether, 11-18 parts of poly-alpha-olefin, 10-20 parts of overbased synthetic calcium sulfonate, 1-3 parts of calcium alkylbenzene sulfonate, 1-3 parts of zinc butyl octyl dithiophosphate, 2-5 parts of salicylate, 4-8 parts of trilinolein, 1-5 parts of trimethyl decane, 3-8 parts of sulfurized calcium alkyl phenolate, 1-6 parts of calcium alkylbenzene sulfonate, 5-9 parts of acetophenone, 10-16 parts of glycerol, 6-10 parts of disodium ethylene diamine tetraacetate, 4-6 parts of modified polysiloxane, 0.7-2.5 parts of a composite antioxidant, and 1-3 parts of a metal deactivator. The lubricating oil has excellent oxidation and abrasion resistance.

The invention discloses an acne-treating moisturizing compound containing herba violae and application thereof. The invention aims to provide the compound which has relatively good acne-treating and moisturizing efficacy, when the compound is applied to a make-up, germs can be inhibited on a skin surface, meanwhile, microbial floras on the skin surface are not changed, the compound is characterized by mainly being prepared from the following components in parts by weight: 7-15 parts of herba violae extract, 4-10 parts of propolis extract, 5-11 parts of folium saponariae officinalis extract and3-8 parts of ramulus/flos/folium magnoliae praecocissimae extract. The invention belongs to the technical field of make-ups.

The invention provides a high-temperature optical fiber micromachining device capable of being opened and closed. The high-temperature optical fiber micromachining device is formed by assembling a heating part, an electrode cooling part and an opening and closing control part. The high-temperature optical fiber micromachining device is characterized in that the heating part is composed of two separated heating bars, and the two heating bars are in butt joint and spliced to form a heating hole; the opening and closing control part is composed of a sliding rail, a sliding block and an extensionspring and used for controlling opening and closing of the heating hole, and avoids that optical fibers are prone to bending and breaking when placed in and taken out of the high-temperature heating hole. In addition, rapid heating and rapid cooling of the heating holes can be achieved by controlling opening and closing of the heating holes of the two heating bars. The high-temperature optical fiber micromachining device is suitable for heating high-temperature treatment of optical fibers and optical fiber scale micro linear materials, can be widely applied to preparation of optical fiber thermal diffusion, optical fiber microlenses and spiral optical fibers, and belongs to the field of preparation of novel optical fiber microstructures.

The invention discloses a conductive plastic, which is characterized by being composed of following raw materials in parts by weight: 15 to 20 parts of polyvinyl chloride, 6 to 10 parts of sodium oleoyl amino fatty acid, 10 to 15 parts of melamine resin, 10 to 12 parts of superconductive carbon black, 2 to 5 parts of lead caprylate, 4 to 6 parts of glass fiber, 2 to 5 parts of methyl silicone oil,5 to 6 parts of titanium-magnesium alloy powder, 1 to 2 parts of barium stearate, 2 to 3 parts of nano titanium dioxide, 2 to 5 parts of zinc chloride, 5 to 7 parts of calcium carbonate, 5 to 8 partsof aluminate coupling agent, and 3 to 5 parts of antioxidant. The provided conductive plastic has the advantages of good conductive performance, strong antioxidant performance, high strength, and lowmanufacturing cost.

The invention discloses a silver nanowire ReS2 functional composite material. The surface of a silver nanowire is coated with a layer of ReS2 nanosheet. The invention also discloses a preparation method of the silver nanowire ReS2 functional composite material. The preparation method comprises the following steps: 1), synthesizing silver nanowires by adopting a polyol method; 2), purifying the silver nanowire to obtain a washed and purified silver nanowire; dispersing the washed and purified silver nanowires in a solvent; centrifuging the dispersed silver nanowire solution in a centrifugal machine, and ultrasonically dispersing the centrifuged precipitate to obtain silver nanowire dispersion liquid; 3), preparing a uniformly dispersed ReS2 nanosheet; and 4), performing hydrothermal compounding on the silver nanowire dispersion liquid and the ReS2 nanosheet to obtain the silver nanowire-ReS2 functional composite material. According to the preparation method, Raman scattering with higherstrength can be provided, and the SERS activity is greatly improved.

The invention belongs to the technical field of veterinary medicines, and particularly relates to a tea polyphenol composition and application thereof in preparing anti-streptococcus-suis medicines. The tea polyphenol composition is prepared from epigallocatechin gallate (EGCG), gallocatechin (EGC), epicatechin gallate (ECG), gallocatechin gallate (GCG) and catechin (EC), and all the components ofthe composition are a series of natural products. The composition has the functions of inhibiting the growth of streptococcus suis and killing the streptococcus suis, the minimum inhibitory concentration of the composition against the streptococcus suis is 1,024 microgram/ml, the minimum bactericidal concentration of the composition against the streptococcus suis is 4,096 microgram/ml, and the composition overcomes the toxic and side effects of vaccines, chemical drugs and antibiotics and hidden food safety hazards and has broad application prospects and high development value in the fields of food processing, medicines and breeding industries.

The invention relates to a feed additive. The feed additive is prepared from a volatile oil mixture and a carrier, wherein the mass ratio of the volatile oil mixture to the carrier is 1 to (4-8), the volatile oil mixture is prepared by mixing turmeric volatile oil, fiveleaf gynostemma herb volatile oil and atractylodes rhizome volatile oil, and the carrier is beta-cyclodextrin. The invention further relates to a preparation method and application of the feed additive in a feed for aquatic animals. Compared with the prior art, if the feed additive disclosed by the invention is applied to the feed for the aquatic animals, the antioxidant ability of the aquatic animals can be notably improved, the total antioxidant ability of serum and the activity of superoxide dismutase can be improved, the antioxidant ability of organisms can be improved, the oxidative damage of the organisms can be avoided, the immunity of the aquatic animals can be improved, the lysozyme vitality and complement vitality in the serum of the aquatic animals can be improved, the leucocyte phagocytic index in the serum can be increased, the health of the organisms can be improved, the growth rate and the survival rate of the aquatic animals can be increased, the growth is promoted, and a theoretical basis is laid for the development of the green raising of the aquatic animals.