768 results about "Sodium ascorbate" patented technology

Provided are methods and compositions for the generation of broad size distributions of polynucleic acid fragments from larger polynucleic acids. The invention provides unbiased polynucleic acid fragments, i.e. fragments representative of all portions of the larger polynucleic acids. The methods are amendable to automation and are cost-effective. The methods comprise contacting the polynucleic acid sample with a reducing agent and a transition metal in a solvent to form a mixture. An exemplified reducing agent is sodium ascorbate, and an exemplified transition metal is copper.

The invention discloses a preparation method of graphene fibers. The preparation method comprises the following steps: (1), a mixture of a graphene oxide solution and a water-soluble reducing agent is added into a tubular reactor, wherein the water-soluble reducing agent is one or more of ascorbic acid, sodium ascorbate, sodium citrate, HI, HBr, NaHSO3, Na2S, ethylenediamine, p-phenylenediamine and hydroquinone; (2), the tubular reactor in the step (1) is heated, and graphene oxide is reduced and assembled to aqueous graphene gel fibers, and the heating temperature is 60-95 DEG C; and (3), the aqueous graphene gel fibers obtained in the step (2) is dried to obtain the graphene fibers. The preparation method is simple to operate, mild in conditions and low in raw material cost; and the graphene fibers obtained with the preparation method are uniform in structure, excellent in mechanical property and easiness in functionalization.

A driving-bird composite contains the following materials by different weight percentage: the driving-bird spice is selected from: 1 to 50 percent of methyl ortho-aminobenzoate, one or two of the 0.1-5 percent of heartleaf houttuynia herb essential oil or 10-21 percent of muskiness T; an antioxidant is selected from one or two of the 0.02-0.5 percent of 2, 6-BHT and sodium ascorbate, and the rest is control-released carriers. The driving-bird colloid mixture is made of the driving-bird composite, and the control-released carrier contains organic base or inorganic base, unsaturated fatty acid, antiseptic, emulsification, stabilizing agent, anti-freeze agent and the like. The driving-bird SC is made of the driving-bird composite, and the control-released carrier contains michael essien alkenyl succinic acid ester of starch sodium or Beta-cyclodextrin, antiseptic, emulsification, stabilizing agent, anti-freeze agent and the like. The invention utilizes the odor of the driving-bird spice for leading the bird-trigeminal to generate anaphylactic reaction and the bird-physiology to generate anorexia after pecking by means of diluting the sprayer, the driving-bird composite has the advantages of convenient usage and good effect of driving, and is harmless to the birds and the plant, thus belonging to the environment friendly biological agent products.

The invention provides a portable copper ion concentration detection method based on click chemistry and belongs to the field of analytical chemistry. Under the condition that sodium ascorbate reduces cupric into cuprous as a catalyst, a 1,3-dipole cycloaddition reaction is carried out between NDA modified with an azide group and DNA modified with an alkynyl group, so that DNA modified with cane sugar invertase is fixed on magnetic beads; The magnetic beads are separated from a solution, the cleaned magnetic beads are dissolved into a cane sugar solution to carry out enzymatic hydrolysis, and then a reaction solution after enzymatic hydrolysis is measured by adopting a blood glucose meter, so that copper ion concentration can be detected. The portable copper ion concentration detection method provided by the invention takes the blood glucose meter as a platform and can portably and quickly detect the copper ion concentration on site; and the portable copper ion concentration detection method can be applied to copper ion detection in a human body serum sample, and the portable copper ion concentration detection method has the advantages of easy operation, low cost, high sensitivity and good specificity.

The invention relates to a preparation method of a preserved low-sugar kiwi fruit, belonging to the field of agriculture product processing. The preserved low-sugar kiwi fruit is prepared from the following components in parts by weight: 30-60 parts of kiwi fruits, 20-50 parts of white granulated sugar, 0.1-1 part of citric acid, 0.1-0.5 part of sodium ascorbate, 0.01-0.1 part of table salt and 0.01-0.05 part of calcium chloride. The preparation method comprises the steps of selecting raw materials; cleaning; peeling; slicing; soaking for protecting the color; hardening; precooking; carrying out microwave sugar infusion; carrying out constant-temperature drying; packaging and the like to obtain a finished preserved low-sugar kiwi fruit. The preserved low-sugar kiwi fruit is pale brown, attractive in appearance, moderate in sweetness and sourness and extremely good in taste.

The invention relates to a method for improving quality of frozen freshwater fish surimi. The method comprises the following steps: pretreating a raw material fish, and collecting meat; alternatively bleaching the meat with a sodium carbonate solution and clean water; adding 2.5% of a low sodium salt mixture for blending; adding the following components in percentage by weight in chopping and stirring processes: 60-70% of fish meat, 10-15% of starch, 5-8% of a fishbone enzymatic product, 0.4-0.7% of a composite antifreeze agent, 0.08-0.12% of a composite antibacterial agent, 0.02-0.04% of tea polyphenol, 0.01-0.012% of TBHQ, 0.015-0.02% of L-sodium ascorbate and 10-18% of icy water; subsequently forming; and freezing, thereby obtaining a frozen fish surimi product with improved quality. By adopting the method, not only are the water retention property, oxidation resistance and antibacterial activity of the fish surimi in the machining process improved, but also the nutrient value of the fish surimi can be increased, so that the fish surimi product can be relatively applicable to industrial production and preservation.

The invention discloses a Nisin composite biological preservative and a preparation method thereof. The preservative comprises the fermentation broth of lactic streptococci and components consisting of, on the basis of the weight of the fermentation broth of lactic streptococci, 0.2 to 0.6% of chitosan, 0.1 to 0.2% of antioxidant bamboo leaves, 1 to 5% of sodium hexametaphosphate, 0.5 to 1% of natamycin, 0.1 to 0.2% of garlicin, 0.05 to 0.1% of sodium ascorbate, 1 to 3% of maltodextrin and 0.5 to 2% of NaCl. The preservative provided by the invention does not contain any chemical preservative, overcomes the defects of a narrow antibacterial spectrum and low dependence on a pH value of pure Nisin, has the characteristics of high efficiency, a wide spectrum, good stability and high security, greatly improves the preservative effect and the application range of Nisin and produces high economic benefits and social benefits.

The invention discloses a lactobacillus plantarum freeze-dried powder and a preparation method thereof, and belongs to the field of production of biological bacteria products. The freeze-dried powder includes whey protein isolate, sorbitol, inulin, sodium ascorbate and lactobacillus plantarum, the content of WPI is 50 g / L-150 g / L, the content of sorbitol is 20 g / L-60 g / L, the content of inulin is 20 g / L-60 g / L, and the content of sodium ascorbate is 10 g / L-30 g / L. The freeze-dried powder significantly improves the survival rate of lactobacillus plantarum compared with a conventional protective agent; in the prepared lactobacillus plantarum freeze-dried powder, the freeze-dried survival rates of lactobacillus plantarum CCFM 8610, lactobacillus plantarum CCFM 8661 and other lactobacillus plantarum reach 100%.

The invention discloses an infant formula milk powder containing lactoferrin and probiotics, and a preparation method of the milk powder. The infant formula milk powder comprises the following raw material components: 20-40% of whole milk powder, 20-45% of demineralized whey powder, 0-18% of lactose, 0-15% of maltodextrin, 5-25% of mixed vegetable oil, 0-12% of skimmed milk powder, 0-10% of whitegranulated sugar, 1-8% of whey protein concentrate, 0-0.5% of phospholipid, 0.05-0.8% of calcium carbonate, 0.25-0.69% of a compound mineral premix, 0.06-0.07% of a compound vitamin premix, 0.1-1.8% of arachidonic acid powder (AA), 0.005-1.5% of docosahexaenoic acid (DHA), 0-0.09% of inositol, 0-0.08% of L-carnitine-L-tartrate, 0.05-0.13% of L-sodium ascorbate, 0-0.3% of tricalcium phosphate, 0.01-0.1% of lactoferrin, 0.01-0.1% of bifidobacterium animalis (Bb-12), and 0.02-0.07% of nucleotides. The infant formula milk powder prepared by the method of the invention is similar to breast milk innutrient components, meets the nutritional requirements for normal infant development, effectively improves the intestinal environment of infants, and improves the immunity of the infants.

The invention discloses a fermentative crispy pickled pepper and an application of the fermentative crispy pickled pepper in a seasoning packet of instant noodles. The fermentative crispy pickled pepper is prepared by the steps of with a fresh pepper as a raw material, fermenting the fresh pepper by virtue of brine rich in lactic acid bacteria, and adding a crisp-keeping agent compounded by alkaline calcium salt and citric acid and a composite antioxidant compounded by tea powder, curcuma powder, sodium ascorbate and the citric acid; with the fresh pepper, the crisp-keeping agent and the composite antioxidant act as the raw materials, directly carrying out vacuum packaging, pasteuring, air drying and cooling to prepare the fermentative crispy pickled pepper. With the adoption of the fermentative crispy pickled pepper, the fermentative crispy pickled pepper is prepared by virtue of a segmented temperature controlling heating technology; flavor compounds of the fermentative crispy pickled pepper can be completely kept by using an embedding and granulation technology, and a fermentative crispy pickled pepper powder packet is prepared; the preparation method is simple and is safe to operate; in addition, in the fermentative crispy pickled pepper seasoning packet of the instant noodles, the pepper is brilliant yellow, is good incrisp feeling, is good in fermentation fragrance and taste, is unique in flavor when being applied in the seasoning packet of the instant noodles, is good in taste and is longer in shelf life.

The invention discloses a preparation method of a water-soluble green fluorescent silicon quantum dot. According to the method, glucose or sodium ascorbate is adopted as a reducing agent (protecting agent); 3-aminopropyltrimethoxysilane or 3-aminopropyltriethoxysilane is adopted as a silicon source; the silicon quantum dot is directly synthesized by adopting a water bath method (the temperature of a water bath is 50 to 80 DEG C); the synthesized silicon quantum dot is purified, so as to obtain the high-purity silicon quantum dot. The method is simple and easily feasible; a current process flow for synthesizing the silicon quantum dot is simplified drastically; the cost for synthesizing the silicon quantum dot is decreased drastically; the heating by the water bath lasts for tens of minutes, so that the water-soluble green fluorescent silicon quantum dot which is nontoxic, is good in water solubility, adjustable in wave length and high in quantum yield can be obtained.

The invention relates to a composition with the efficacies of whitening, moisturizing, repairing and caring the skin, as well as a preparation method and applications of the composition. The skin care composition is prepared from the following raw materials: water, sodium hyaluronate, sodium dihydrogen phosphate dihydrate, potassium chloride, sodium hydroxide, calcium chloride, glutamine, benzalkonium chloride, magnesium sulfate, aminobutyric acid, sodium ascorbate, alanine, arginine, lysine hydrochloride, valine, histidine, leucine, taurine, coenzyme A, alcohol, polysorbate 80, thiamine, disodium diphosphate, recombinant human epidermal cell growth factors and the like. The skin care composition disclosed by the invention can permeate the muscle bottom for replenishing water for the skin from the deep layer, so that the skin is full of elasticity, the color of the skin is brightened, the fine wrinkles are reduced, the skin is clean and watery, the balance of water and oil is regulated, the pores are shrunk, meanwhile, the brightness of the face can be increased, the injured epidermal layer is effectively repaired, the activity of tyrosinase is inhibited, the generation of skin melanin is reduced, so that the skin is healthy, natural and white.

The invention provides a novel conductive film and a multilayered conductive structure, comprising a plurality of metal nanowires arranged in clusters and having an average aspect ratio of least 100,000, optionally decorated by metal nanoparticles. It is also disclosed a process for preparation of a conductive film comprising metal nanowires by surfactant / template assisted method which involves the use of a precursor solution based on surfactant (such as CTAB), metal precursor (such as HAuC14 and AgN03) and reducing agent (such as metal borohydride or sodium ascorbate).

The invention discloses a lactobacillus bulgaricus freeze-drying protecting agent and a preparation method thereof. The lactobacillus bulgaricus freeze-drying protecting agent comprises the following components in parts by mass: 20-30 parts of lactose, 20-30 parts of dried skim milk, 3-5 parts of sodium ascorbate, 0.2-0.6 part of polyethylene glycol 4000, 0.2-0.8 part of polyvinylpyrrolidone, 0.5-2.0 parts of bovine serum albumin and 100 parts of distilled water. The freeze-drying protecting agent is added in a powder preparation process, so that the anti-freeze capacity of the thalli can be improved, thereby improving the freeze-dry survival rate of the powder and guaranteeing long storage period and low probability for reduction of the survival rate.

The invention discloses an edible compound coating antistaling agent for drupes. The edible compound coating antistaling agent belongs to the field of fresh preservation and treatment of fruits and vegetables and is characterized in that chitosan and other auxiliaries are dissolved in a water solution prepared in an acetic acid solution with low concentration. According to the invention, glycerylmonostearate and Tween 80 are added in chitosan coating, thus the connecting strength of antibacterial components is enhanced and, the toughness and air permeability of the coating are improved; and meanwhile, other components in the fresh preservation agent, such as sodium ascorbate, sodium chloride, and the like, have greater bacterial resistance and fresh preservation effects. The edible compound agent, after being applied to coating the drupes, can form a layer of shiny transparent film on the surface of each drupe and achieves the functions of preserving water, reducing bacterial contamination, preventing the growth of microorganisms, resisting oxidation and inhibiting the fruit respiration. The edible compound agent can be widely applied in the storage and fresh preservation of the drupes and achieves greater fresh preservation effects than other methods. The edible compound agent is convenient to prepare and use, requires small equipment investment, occupies a small operation area, and is suitable for industrial batch production.

The invention discloses a method for preparing a NaYF4:Yb,ER up-conversion fluorescent material by adopting electro-deposition, which comprises the following steps of: 1) cleaning indium tin oxide (ITO) conductive glass for 2 to 3 times by using acetone, cleaning the ITO conductive glass in an ultrasonic cleaner for 10 to 30 minutes by using deionized water, activating the ITO conductive glass in 10 percent salpeter solution for 10 to 30 seconds; and cleaning with deionized water for later use; 2) adding sodium ascorbate into coordination compound solution consisting of 0.003-0.3mol / L ethylene diamine tetraacetic acid and yttrium ions, ytterbium ions and erbium ions in a molar ratio of (75-94):(5-20):(1-5), adding solution of sodium fluoride, and regulating the pH value to be 5-7 to obtain the electrolyte for later use; and 3) taking the ITO conductive glass as a working electrode, a platinum electrode as a counter electrode, and a saturated calomel electrode as a reference electrode for electro-deposition, and annealing the prepared film. The method has the characteristics of simple equipment, low cost, high deposition rate, low material growth temperature, and capacity of being operated at normal temperature and normal pressure, and is expectedly used for industrial production.

The invention belongs to the field of preparation of metal ultrafine powder materials and particularly relates to a method for continuously preparing ultrafine sliver powder on the basis of a microchannel mixed reaction system. According to the method, an oxidation solution containing soluble silver salt and nitric acid and a reduction solution containing ascorbic acid or sodium ascorbate are continuously conveyed to the microchannel mixed reaction system respectively through driving devices, mixing is carried out in a Y-type tee joint or a tee joint in the microchannel mixed reaction system, wherein the Y-type tee joint or the tee joint serves as a mixing unit of reactive materials, the mixed solutions flow out of reaction microchannels after being subjected to a reaction in the reaction microchannels in the microchannel mixed reaction system, standing is carried out on obtained reaction products, washing and sediment are carried out on the products, and ultrafine sliver powder of different morphologies and sizes can be obtained after suction filtration and drying. According to the method, control over the crystallization morphologies and the sizes of ultrafine sliver powder particle products can be achieved by adjusting the components of the oxidation solution, the components of the reduction solution, the molar concentration, the temperature and other parameters.

The invention belongs to the field of healthcare products and particularly relates to compound vitamin tablets and a preparation method thereof. Each compound vitamin tablet provided by the invention comprises a tablet core and a film coating layer, wherein the tablet core is mainly prepared from vitamin A acetate, sodium ascorbate, DL-alpha-tocopheryl acetate, nicotinamide, calcium pantothenate, thiamine hydrochloride, riboflavin, pyridoxine hydrochloride, folic acid, D-biotin, zinc oxide, sodium selenite, pre-gelatinized starch, maltodextrin, microcrystalline cellulose and silicon dioxide; and the film coating layer is mainly prepared from hydroxypropyl methyl cellulose, polyethylene glycol 4000, polyvinylpyrrolidone, titanium dioxide, castor oil and water. The compound vitamin tablets provided by the invention have the advantages of high safety and abundant nutrition and can provide the vitamins and minerals necessary for pregnant women so as to enhance immunity; meanwhile, the compound vitamin tablets can effectively reduce the abortion rate of pregnant women and oaf incidence; and therefore, the compound vitamin tablets are a perfect compound vitamin product for pregnant women.

The invention relates to a nutritious cat feed and a making method thereof and belongs to the field of an animal feed. The nutritious cat feed comprises fish meal paste, corn meal, adhesive, root potato, green pea, salt, monosodium glutamate, vitamins, sodium ascorbate and water and is prepared by uniformly mixing the raw materials; steaming, cooling and dicing; mixing the obtained product with sauce prepared from duck fat, soy, sugar and water; bagging; and after carrying out vacuum sealing, carrying out sterilization and health preservation. The nutritious cat feed has the beneficial effects that the nutriments are comprehensive and balanced; the palatability is good; the quality of the nutritious cat feed can be assured for over 3 years; and a wet provision can which is prepared from high-grade raw materials such as high-quality fishes and the like is the closest to the main food which is ideal to eat by domestic pets and is more beneficial to health of cats.

The invention relates to a fluorescent ion probe reagent used in cadmium ion detection, which is the derivate of 8-hydroxyquinoline and triazolyl modified Beta-cyclodextrin; wherein 8-hydroxyquinoline is adopted as probe molecule, and nitrogen oxide atom in quinoline ring and nitrogen atom in triazole ring are taken as the bonding lotus of cadmium (II) ion. The method comprises the steps of: synthesizing 8-hydroxyquinoline alkynyl intermediate by 8-hydroxyquinoline, 3-propargyl bromide and the like firstly; and synthesizing a target product by the intermediate, mono-6-deoxy-6-azido-Beta-cyclodextrin, sodium ascorbate and the like. The invention has the advantages that as water-soluble cadmium ion fluorescent probe, the prepared cyclodextrin derivate has simple synthesizing process and high yield, and is suitable for further enlargement synthesis and practical production application; the sensing operation to cadmium ion is simple and practical; and the sensitivity is high and displayed by fluorescence spectrum. As cadmium ion fluorescent probe, the invention exactly explains the coordinate bonding mechanism to cadmium (II) ion and has wide application prospect.

The invention relates to a fermented pork ham, which belongs to the field of food. The aim of the invention is to provide the fermented pork ham produced through a new producing formulation and a new process. The compositions of raw materials for active components for producing the fermented pork ham in weight portion are as follows: salting ingredients comprises pork, edible salt, sodium nitrate, sodium ascorbate, ground pepper, and nutmeg powder; and inoculation injection ingredients comprises water, the edible salt, pediococcus pentosaceus, and lactobacillus sake. The fermented pork ham has broad range of selected materials and is acceptable in forms of joint or small piece. The producing method adopts an injection inoculation and rolling dispersion technology so that bacterial strains can be quickly dispersed in the pork evenly, the fermentation is even, and the fermentation speed is greatly improved.

The invention relates to a whitening composition (uniGlow) and an application thereof. The whitening composite comprises phenylbenzimidazole sulfonic acid, hydroxyphenylpropylamide benzoic acid, dipotassium glycyrrhizinate, undecylenoyl phenylalanine, hydrolyzed shellfish protein, beta-arbutin, ellagic acid, sodium ascorbate phosphate, carnosine, nicotinamide, inositol, papain and hesperidin extract. The whitening composition performs targeted inhibition from the melanin forming inducements of UV, inflammatory factors, melanoma and endothelin; in the melanin synthesis process, tyrosinase inhibits the reduction with a melanin intermediate, blocks the melanin transfer pathway, accelerates stratum corneum spalling and accelerates the metabolism; by conditioning, the skin is fine, tight, natural, white and bright.

The invention is a pet feed, which is made by evenly mixing chicken grinded mud, animal blood powder, grain flour, adhesives, root potatoes, green legume, salt, gourmet powder, vitamin and sodium ascorbate with water, then after cooking, cooling and dicing, mixing with the sauce juice made by sugar, chicken oil, soy sauce and water for vacuumizing, and then sterilizing and preserving. It can keep quality for above 2 years.

The invention relates to a xanthophyll-reinforced sweet corn beverage prepared by adding a xanthophyll microcapsule into sweet corn juice. A trans-xanthophyll crystal is taken as a core, starch octenylsuccinate and sucrose are taken as wall materials, the xanthophyll microcapsule is prepared by the processes of emulsifying, homogenizing, spray drying and the like, the efficiency and yield of the product microcapsule can reach 90 percent respectively, and the microcapsule has high quality. A preparation method comprises the following steps of: unfreezing quick-frozen sweet corn kernels serving as a raw material, pulping, regulating the pH, performing enzymolysis, filtering, adding a compound stabilizer (xanthan gum and sodium alginate), fructose, citric acid, sodium ascorbate and the xanthophyll microcapsule for mixing, and sterilizing and filling to obtain the xanthophyll-reinforced sweet corn beverage. The sweet corn beverage has unique flavor, fine and smooth mouthfeel and rich nutrition, has certain effect of preventing and treating impaired vision and blindness caused by age-related macular degeneration (AMD), and is particularly suitable for old people; and 100g of sweet corn beverage comprises 2.03mg of trans-xanthophyll, and the trans-xanthophyll content is higher than that of the common sweet corn beverage.

A shower filter apparatus to neutralize chlorine and chloramines from water using water soluble vitamin c in the forms of ascorbic acid and sodium ascorbate, vitamin e in the form of tocopheryl acetate to prevent the oxidation of vitamin c, a cylindrical threaded replaceable sealed cartridge system with carefully sized media feed apertures to control delivery of said vitamin solution, a gasketed flow control device that creates a positive water tight seal over the media feed apertures when the device is not in use, a transparent observation window within the media cartridge.

The invention provides a preparation method of a porous graphene / carbon nano tube lithium sulfur anode material. The method comprises the steps of introducing silicon dioxide microspheres as a template, mixing with a carbon nano tube dispersion liquid, dropwise adding a sodium ascorbate solution, using hydrofluoric acid for soaking for 5 to 7 days, and obtaining a porous graphene / carbon nano tube;grinding with a sulfur elementary substance, using a hydrothermal reaction kettle for heating for 10 to 15h at 140 to 160 DEG C under the argon protection, and obtaining a sulfur / porous graphene / carbon nano tube. The material prepared by the invention adopts the porous graphite / carbon nano tube composite material as a frame so as to form a three-dimensional conductive network structure, so that sulfur can be stored, and a battery performance is improved.

The invention discloses a lactobacillus acidophilus composite freeze-drying protective agent and a preparation method and a usage method thereof. The protective agent comprises lactose, galactose, trehalose, Na2HPO4, sodium ascorbate and MgSO4. Compared with the prior art, the protective agent don not contain glycerol, so that the livability (above 85%) and the stability of freeze drying preservation of the lactobacillus acidophilus, the storage period (the period is 1 year, mycelia powder viable count is more than 1011cfu / g) of the lactobacillus acidophilus is prolonged, and no milk composition is included, and the agent can be used widely in non-dairy products. The preparation method and the usage method are simple, easy to operate and low in cost.

The invention relates to a composite preservative for meat product, which is prepared by 10-20 parts of nisin, 60-80 parts of sodium acetate, 10-20 parts of sodium ascorbate, 0.1-2 pats of sodium ascorbate and 0-1 part of bamboo leaf antioxidant. The preservative is simple in operation, convenient to use, safe and reliable, can obviously prolong the shelf period of meat products and can used for corrosion prevention and fresh reservation of the meat products.

The invention discloses polymer mixed type grafted nano silicon dioxide, a PVDF (Polyvinylidene Fluoride) microfiltration membrane and application thereof. A preparation method of the silicon dioxide comprises the following steps: taking nano silicon dioxide and an amino silane coupling agent to react to obtain amino silicon dioxide; adding an acid capturing agent; dropwise adding bromoalkylacyl bromide under an ice water bath condition; after reacting, obtaining bromo silicon dioxide; adding sodium azide and reacting to obtain silicon dioxide azide; finally, adding a mixture of an alkynyl-containing hydrophilic polymer and an alkynyl-containing hydrophobic polymer, copper sulfate and sodium ascorbate; reacting to prepare the polymer mixed type grafted nano silicon dioxide. Polymer chain segments easy to mix with the PVDF on the surfaces of modified silicon dioxide particles can fix silicon dioxide after film formation, so that the obtained hydrophilic modified microfiltration membrane has very good durability; furthermore, the modified silicon dioxide enables a polymer membrane to automatically form an asymmetric structure in an oil-containing wastewater treatment process, so that the polymer membrane has an efficient oil-water separation performance.

The invention discloses high-inoxidizability lutein microcapsules.The microcapsules are prepared from a core material, a wall material, an auxiliary material and an antioxidant, the core material is a combination of lutein crystals and sunflower seed oil, the wall material is one of or a mixture of starch sodium octenyl succinate, gelatin and Arabic gum, the auxiliary wall material is one of or a mixture of sucrose stearate, sodium caseinate, lactose and sucrose, the antioxidant is one of or a mixture of L-ascorbyl palmitate, L-sodium ascorbate and lecithin, and a mass ratio of the core material, the wall material, the auxiliary wall material and the antioxidant is 5-30:20-60:10-40:0.3-3.The invention further discloses a preparation method of the microcapsules.Spray granulation and cold air boiling drying technologies are improved, and yield of the microcapsules is obviously increased while waste of raw materials is reduced.By using the preparation method, oxidization stability of the lutein microcapsules can be improved greatly, so that shelf life of the microcapsules is prolonged.