109results about How to "Delay oxidative deterioration" patented technology

The invention provides a premix containing organic microelements and a feed prepared from the premix, wherein the premix is formed by small peptide chelate type organic microelements and high-efficiency protein selenium. The piglet complete feed is characterized in that in each ton of piglet complete feed, 200-2000g of the premix is added, each 500g of premix contains 50-200g of small peptide chelate iron, 50-250g of small peptide chelate zinc, 20-50g of small peptide chelate copper, 25-100g of small peptide chelate manganese, and 5-15g of protein selenium. The small peptide chelate type organic microelements include Optimin zinc, Optimin manganese, Optimin copper and Optimin iron, all of which contains 2-3 amino acids. According to the premix and the piglet complete feed provided by the invention, dosage of inorganic microelements is reduced, pollution of inorganic microelements and heavy metals to the environment is obviously reduced, further, the feed utilization ratio and productivity of piglets are improved, the oxidative deterioration of the feed is reduced, the palatability of the feed is improved, and the growth healthy state of the piglets is promoted.

The invention relates to the technical field of food processing, and especially relates to essence oil microcapsules and a preparation method thereof. The essence oil microcapsules are composed of the following materials: wall materials, a first emulsifier, a stabilizer, and buffer salt. The core of the essence oil microcapsules is composed of the following materials: core materials, and a second emulsifier. The wall materials are composed of the following components: a component A and a component B; the component A is maltodextrin and / or malt syrup; and the component B is whey protein isolate and / or soy protein isolate. The preparation method of the essence oil microcapsules is capable of obviously raising the oil contents of the essence oil microcapsules; and the oil contents of the prepared essence oil microcapsules can be up to 23-35% while the embedding rates are 90% or higher. The preparation method is simple in technology, and low in cost; moreover, the preparation conditions can be easily controlled. The prepared essence oil microcapsule products have good stability, as well as good solubility and dispersion performance. Thus, the essence oil microcapsules can be widely applied in the industries, including the health-care product industry, the pharmaceutical industry, and so on.

The invention discloses no-antibiotic feed for a piglet. The no-antibiotic feed comprises the following materials: expanded corns, soybean meal, expanded soybeans, flour, whey powder, fish meal, soybean concentrated protein, plasma protein powder, soybean phospholipid, sucrose, glucose, sodium chloride, calcium lactate, calcium dihydrogen phoshate, special enzyme for a baby pig, a detoxication agent, citric acid, sodium butyrate, eucommia bark extract, xylooligosaccharide, lactobacillus, a phagostimulant and compound premix, wherein the phagostimulant contains calcined oyster shell powder, fiveleaf gynostemma herb, lalang grass rhizome, pine needle, denucleated wild jujubes, malic acid, radix glycyrrhizae preparata, royal jelly freeze-dried powder and peony cake meal. The no-antibiotic feed and the preparation process disclosed by the invention have the advantages that by the feed formula, the growth performance and the immunity of the piglet can be obviously improved; and by the mode of proportioned nutrition, the diarrhea and the death rate of the piglet are reduced, the effect of preventing and treating diseases is achieved and the feeding attraction and growth-promoting effects are obvious.

A seaweed tea is prepared from seaweed powder and ginger powder through proportional mixing, baking, parching and grinding. It has no odor and sure health-care action.

The invention discloses edible powder tea oil comprising the following components in percentage by weight: 15 to 35 percent of refined tea oil, 40 to 60 percent of maltodextrin, 20 to 40 percent of arabic gum, 0.5 to 2.5 percent of molecular distillation monoglyceride, 0.5 to 2.5 percent of sucrose ester and the balance of water. By adopting a physical pressing method, oil in the tea seeds is extracted; by low-temperature refining, suitable emulsification and homogenization, a convenient and economical spraying drying method is successfully applied to the preparation of the powder tea oil; the process is simple and feasible; the preparation conditions are easily controlled; the edible powder tea oil particles which are obtained by preparation are uniform and similar to spherical shape; the particle size is within 10 to 40 Mum; the refined tea oil content in the powder is 100 to 300mg / g; the micro-encapsulation efficiency reaches over 90 percent; the solubility and the thermal stability are good; the defect of limited application due to the insolubility of the tea oil in water is avoided; and the edible powder tea oil can be widely applied to food, medicine, cosmetics and other industries.

A process for extracting oil from plant seeds features that the supercritical CO2 fluid is used to extract the oil containing conjugated unsaturated fatty acid from the seeds of pumpkin, summer squash and pomegranate at low temp lower than 50 deg.C and 40 MPa. Its advantages are no damage to conjugated unsaturated fatty acid, high output rate and no toxic by-effect.

The invention relates to a preparation method of a health-care samara oil product and in particular relates to a preparation method of a samara oil pulverized tablet. The preparation method comprises the following steps of: sufficiently swelling sodium carboxymethyl cellulose and starch by using water, dissolving samara protein in water, dissolving beta-cyclodextrin, malt dextrin and lactose in the water, mixing the three solutions according to the volume ratio of (2-3) to (1-2) to 7 in sequence, stirring to obtain a mixed aqueous solution, taking and adding sucrose fatty acid ester and molecular distilled monoglycerides into samara oil, slowly adding a grease solution into the mixed aqueous solution in a state of stirring, and then homogenizing; spraying samara oil emulsion into a spray drying tower by using an atomizing spray gun, so as to obtain samara grease powder at a discharging port of the spray drying tower; sieving the obtained samara grease powder by using a screen, adding magnesium stearate into the sieved samara grease powder, and tabletting the mixed powder to obtain the samara oil pulverized tablet. The preparation method can be used for solving the problems that the samara oil is poor in compressibility and inconvenient to take after being pulverized.

The invention relates to a preparation method for oily and oil soluble drug nanocapsules, and aims at solving the problem that the existing nanocapsules prepared by the existing method have low packing efficiency and are large in grain size. The preparation method comprises the following steps of 1. preparing gelatin solution and chitosan solution; 2. preparing O / W emulsion with grain size of nanoscale; 3. adding the chitosan solution into the O / W emulsion with grain size of nanoscale so as to obtain mixed liquor; and 4. regulating pH value of the mixed liquor so as to obtain compound condensate, diluting the compound condensate and adding a curing agent, and then drying so as to complete the preparation of oily and oil soluble drug nanocapsules. The preparation method for oily and oil soluble drug nanocapsules is applicable to the technical field of medicines.

The invention discloses a composite functional liposome and a preparation method and application thereof. The composite functional liposome comprises the following components: granulesten, cholesterin, vitamin C and salicylic acid, wherein the mass ratio of the four components is 5-7:1.3-1.5:0.8-1.5:1. The method for preparing the composite functional liposome comprises the following steps of: dissolving the granulesten, the cholesterin and the salicylic acid in an organic solvent to obtain a mixture serving as oil phase; emulsifying the mixture and vitamin C-containing buffer solution which serves as water phase to form water-in-oil microemulsion; emulsifying the water-in-oil microemulsion and buffer solution to finally form water / oil / water multiple emulsion, wherein the emulsification process is completed by ultrasonication; and removing the organic solvent through decompression and distillation to obtain the composite functional liposome. The composite functional liposome has stable property, contains fat-soluble medicaments and water-soluble medicaments, exerts the effects of various medicaments to compound the functions of the liposome, is applied to cosmetics, improves the stability of the medicaments, and reduces the production cost.

The invention provides a method for preparing fingered citron essential oil. The method comprises the following steps: sequentially selecting fingered citrons, cleaning, crushing and squeezing; performing steam distillation on the squeezed fingered citron materials, thereby obtaining the fingered citron essential oil; and refining the fingered citron essential oil. The method is characterized in that the steam distillation step is finished under vacuum conditions. According to the method disclosed by the invention, the problem in the prior art that the fingered citron essential oil is low in quality can be solved, and the method has short preparation cycle.

The invention discloses mildew-proof and fresh-keeping coated paper and a processing method thereof. The mildew-proof and fresh-keeping coated paper is prepared from a mildew-proof and fresh-keeping coated paper raw paper layer and a blocking mildew-proof coating formed on the raw paper layer, wherein the blocking mildew-proof coating is prepared from the following components in parts by weight: 50 to 60 parts of polyvinylidene chloride emulsion, 10 to 20 parts of an ethylene-vinyl acetate copolymer emulsion, 1 to 5 parts of isocyanate, 5 to 20 parts of a micro-encapsulated mildew preventive,0.5 to 2 parts of emulsifying agent and 0.05 to 0.5 part of de-foaming agent; a capsule membrane material of the micro-encapsulated mildew preventive is cyclodextrin or chitosan; a capsule core of themicro-encapsulated mildew preventive is selected from at least one of an organic mildew preventive and an inorganic mildew preventive. The mildew preventive in the mildew-proof coating of the mildew-proof and fresh-keeping coated paper is subjected to micro-encapsulation treatment and the mildew preventive is covered with a bag film, so that the slow release and mildew prevention effects are realized and the mildew-proof and fresh-keeping coated paper can keep antibacterial and mildew-proof effects for a long time; the mildew-proof and fresh-keeping coating has good water-oxygen stopping performance and can keep moisture in packages constant.

The invention discloses a preparation method of nylon 65 salt. Glutarate is dissolved in a solvent, the mixture is heated to 30-50 DEG C, and a glutarate solution is prepared; hexamethylendiamine is dissolved in a solvent, the mixture is heated to 30-50 DEG C, and a hexamethylendiamine solution is prepared; the hexamethylendiamine solution is dropwise added into the glutarate solution under constant rate stirring at the temperature of 30-50 DEG C, inert gas is introduced for protection, the pH value is monitored by a pH meter in real time, the pH value is controlled to range from 7.20 to 7.90,and the reaction is carried out for 1.5 h to 5.0 h; after the material completely reacts, reduced pressure distillation or direct suction filtration is carried out, and then nylon 65 salt is dried ina vacuum drying box for 24 h at the temperature of 60 DEG C; the dried nylon 65 salt is purified through a purification solvent, the nylon 65 salt is dried, and the pure nylon 65 salt sample is obtained. The prepared nylon 65 salt is high in yield, the pH value is monitored by the pH meter in real time in the reaction process, reaction monitoring is convenient, the reaction conditions are moderate, and operation is easy.

The invention discloses a method for producing multi-stage sterilized instant sweet corn cobs capable of being preserved at normal temperature, relating to a normal temperature preservation and processing method for flexible packed sweet corn cobs. The method comprises the procedures of shelling, picking, cleaning, bagging, vacuumizing, sealing, sterilizing and cooling. The method is characterized by comprising the following specific procedures of: in the pre-boiling procedure, adding a composite additive prepared from 0.2 percent of gellan gum, 0.05 percent of sodium hexametaphosphate and 0.010 percent of sucrose fatty acid ester based on the weight of pre-boiling water into the pre-boiling water, and putting the picked corn cobs into boiling water for blanching; performing first coolingafter the pre-boiling procedure; performing the bagging, vacuumizing and sealing procedures; performing the subsequent sterilizing procedure, namely sterilizing the bagged corn cobs in a two-times water soaking high-pressure sterilization mode; performing secondary cooling after sterilizing; and performing a bag wiping procedure after the secondary cooling. The method has the advantages that: theadded composite additive for blanching and pre-boiling has no side effect and can keep tender and prevent ageing; and in the two-times water soaking high-pressure sterilization process, the sterilization temperature, the sterilization pressure and the sterilization time are appropriate.

The invention discloses a biodegradable film for inner package of hygienic products. The biodegradable film comprises the following raw materials in parts by weight: 8-15 parts of cellulose, 10-20 parts of starch, 40-65 parts of polylactic acid, 10-20 parts of a softening and toughening agent, 3-10 parts of an antioxidant, 3-10 parts of an antibacterial agent and 1-4 parts of graphene. The polylactic acid (PLA) is used as a matrix polymer, cellulose is added to improve the strength, the softening and toughening agent, starch and graphene are added to promote the mixing reaction of cellulose and polylactic acid, the antioxidant is added to improve the product stability, and the product has good antibacterial property through adding of the the antibacterial agent. The product is safe, non-toxic, good in barrier property, excellent in film forming quality and capable of being completely degraded, and all performance indexes meet the national standard; the product can be automatically degraded under natural conditions, the number of non-degradable waste plastic parts in the environment can be reduced, and the pressure of environmental pollution is relieved.

The invention relates to a fennel essential oil microcapsule and a preparation method thereof and belongs to the field of preparation of microcapsules. Fennel essential oil is adopted as a core material, a uniform mixture of beta-cyclodextrin and gelatin is adopted as a wall material and monoglyceride is adopted as an emulsifier. The preparation method comprises the following steps of sequentially adding the wall material and the emulsifier into a hot water for dissolving, adding the core material into the solution while stirring, stirring at a high speed for several minutes, under a high pressure of 30-40MPa, and homogenizing twice to form an emulsion with uniform particle size and carrying out spray drying to obtain the fennel essential oil microcapsule. The method is simple in process and the product has good thermal stability and soluble dispersion and can be widely applied in industries, such as food and medicines.

The invention discloses a preparation method of a volatile oil beta-cyclodextrin inclusion compound, which is characterized in that volatile oil is extracted from capillary artemisia, cabline patchouli, rhizoma atractylodis macrocephaiae, tangerine peel and rhizoma alismatis, and the inclusion compound is prepared through inclusion of beta-cyclodextrin. The volatile oil beta-cyclodextrin inclusion compound prepared in the method has a high inclusion rate.

The invention relates to a film-coating fresh-keeping method for fruit clusters of America red globe grapes, belonging to the technical field of fruit and vegetable storage and processing. The invention takes the America red globe grapes as the object; firstly, the chitosan is dissolved with glacial acetic acid and then is swelled by adding water; the glycerin is added in, and the water with determined capacity is added; the chitosan membrane liquid with 1 percent to 2 percent of concentration is prepared; and then the fruit clusters of the red globe grapes are soaked for 1 min to 2 min in the chitosan membrane liquid, taken out for airing, and then are loaded into the fresh-keeping bag and stored in a cold storage warehouse at the temperature of 4 DEG C, so that the fruit stalks and the spike stalks can be effectively prevented form being dehydrated and the quality of the grapes can be maintained. The film-coating fresh-keeping method can prevent the fruit stalks of the grapes from being dehydrated, enhances the freshness of the spike stalks and the fruit stalks of the grapes, effectively maintains the quality of the grades, improves the commodity value and is suitable for storage and fresh-keeping for the red globe grapes.

The invention discloses a coextrusion-lamination obstructing packaging film and belongs to the technical field of packaging materials. According to the coextrusion-lamination obstructing packaging film, the problems that an intermediate layer of an existing coextrusion film is relatively high in water absorption, the permeability resistance of barrier layers is reduced, the effective expiration date of a product is short, and meanwhile, due to structure arrangement of the intermediate layer PA of the coextrusion film and the single barrier layers at two sides of the intermediate layer, high barrier property and high coextrusion malleability property of the packaging film can not be simultaneously realized are solved. The packaging film comprises a BOPET (biaxially-oriented polyethylene terephthalate) film, an APET shading film, a first PE polyethylene film, a first PET polyester film, a first EVOH barrier layer, a PVDC gas barrier film, a second EVOH barrier layer, a second PET polyester film and a second PE polyethylene film, wherein the BOPET film, the APET shading film, the first PE polyethylene film, the first PET polyester film, the first EVOH barrier layer, the PVDC gas barrier film, the second EVOH barrier layer, the second PET polyester film and the second PE polyethylene film are co-extruded and compounded from outside to inside to form the packaging film. The packaging film disclosed by the invention is especially suitable for packaging fresh seafood, beef and dried tofu.

The invention relates to an oral EPA(Eicoeapentaenoic acid) O / W type nanoemulsion and a preparation method thereof. The product disclosed by the invention is used as a nutritional strengthener. The oral EPA O / W type nanoemulsion is prepared from EPA, EPA ethyl ester or EPA glyceryl ester as well as an oil phase, surfactant, cosurfactant, antioxidant, metal salt and water, wherein the purity of the EPA, EPA ethyl ester or EPA glyceryl ester is greater than or equal to 90wt%, and the EPA, EPA ethyl ester or EPA glyceryl ester accounts for 0.2%-20% of the nanoemulsion in mass percent. The EPA nanoemulsion produced by the method disclosed by the invention has the advantages of high oil content, small particle size distribution, good stability and high transparency, is favorable for digestion and absorption of a human body and can be applied but not limited to beverages, yoghourt, health care oral liquids and medicinal oral liquids.

The invention discloses a method for making rich-nutrition cookies, comprising the production steps of (1) stirring sugar, cream, egg, shortening, baking soda and salt in a stirrer; (2) crushing filberts, lotus seeds, konjak and semen euryales respectively, and filtering the same through a 250-mesh siver, thereby obtaining powders for standby; (3) adding flour, ethyl maltol, gellan gum, konjak powder, filbert powder, lotus seed powder and semen euryales powder to the mixture of the step (1) and then continuing stirring to obtain paste; (4) forming the paste into cookie bases through roll mark moulding or extrusion moulding; and (5) putting the cookie bases in an oven for baking at 150-170 DEG C for 12-15 minutes, and cooling the baked cookies until the temperature thereof reaches the room temperature, thereby obtaining the cookies provided by the invention. The cookies made by the method provided by the invention is rich in nutrition, capable of adjusting the acid-base balance of the human body, capable of nourishing promordial Qi due to containing of various amino acids, crisp and good in taste and fully flavoured; and the cookies can be stored for a long time.

The present disclosure comprises a natural method of feed supplement to beef cattle, with a maize extract obtained from the nixtamalization process with a high content of ferulic acid and its salts, for a period of 30 days in the final phase of the feedlot. Use of this dietary supplementation enables an increase in carcass yield and meat quality that is not negatively affected as with a commercial β-agonist. In addition to the above effects, the effective supplementation of ferulic acid to cattle is shown to have antioxidant effects on fresh meat during its shelf life, which can lead to great benefits for the industrial meat market.

The invention discloses a method and an apparatus for removing moisture and solid impurities in pattern material for investment casting by the way of coalescence under pressure. By means of the wet coalescence effect and collision coalescence effect of surface hydrophilic coalescent pack arranged in an insulating tank on water drops, the water drops in the pattern material can be adsorbed to coalesce on the surface of the pack and gradually formed into big water drops, and the big water drops flow on the surface of the pack, come off from the edge, settle in the pattern material and separate from the pattern material; at the same time, solid impurities or soluble salt dispersed in the water drops or adsorbed on the surfaces of the water drops settle along with the water drops as well, and thereby the water and the impurities are removed from the pattern material. A control system can control heating power and regulate feed flow, discharge flow and drainage flow according to the values of a temperature sensor, a pressure sensor, a wax-water interface sensor and the like to realize continuous and stable operation. The invention overcomes the defects of conventional apparatuses, such as long treatment time, high energy consumption, low efficiency and large equipment-occupied space, and achieves an energy-saving, high-efficiency, continuous and stable pattern material water and impurity removal process.

The tea polyphenol detoxicated edible oil is prepared through mixing tea polyphenol with small amount of edible oil to obtain edible oil with high concentration tea polyphenol, mixing the edible oil with high concentration tea polyphenol with sterilized edible oil, and final packing. The edible oil product has tea polyphenol content of 0.1-0.5 wt%. Adding tea polyphenol extracted from tea as the natural additive into edible oil can eliminate the harm of heavy metal polluted food on human body and prolong the preservation period of edible oil.

An automobile lubricating oil additive is composed of the following raw materials in parts by weight: 3 to 6 parts of phosphorodithioate, 2 to 4 parts of random polypropylene, 1.2 to 3 parts of oligomer of trimethyl hydrogen quinazoline, 4 to 6 parts of phenothiazine, 5 to 8 parts of phenyl-2-naphthylamine, 2 to 4 parts of methyl silicone oil, 3 to 5 parts of calcium oxide, 1 to 2 parts of succinate, 4 to 7 parts of mesembryanthemoidigenic acid, 3 to 6 parts of glycerin acrylate, 7 to 10 parts of lupeol palmitate, 5 to 8 parts of linolenic acid, 6 to 9 parts of coconut diethanolamide, 5 to 8 parts of inositol hexaphosphate, 2 to 4 parts of calcium chloride, 6 to 10 parts of polyacrylic acid, 4 to 7 parts of sodium dodecyl benzene sulfonate, 2 to 6 parts of tetrahydropalmatine, 3 to 5 parts of lupeol palmitate, 8 to 16 parts of benzyl alcohol, and 7 to 12 parts of sulfurized calcium alkyl phenate. The provided automobile lubricating oil additive has an improved viscosity index and a good lubricating performance, can effectively prevent lubricating oil from being oxidized or degraded, and prolongs the service life of lubricating oil.

The invention discloses a method for producing a high-activity minced fillet and product anti-freezing agent by enzymolysis of silver carp flesh. The method comprises the following steps: washing silver carp with ice water, collecting flesh, dehydrating, mincing, controlling enzymolysis with neutral compound protease, heating for enzyme deactivation, centrifuging for taking supernatant, executingconcentration, executing separation and purification with an ultrafiltration membrane and executing drying. According to the method, low-value silver carp flesh is selected as a raw material, so thatthe method plays the important role in utilization of silver carp resources and improvement of additional value of silver carps, and has obvious economic benefits and environmental benefits. The anti-freezing agent has high low-temperature protection activity when applied to frozen minced fillet, has no sweet taste, and can maintain the flavor of the minced fillet; compared with the tedious multi-step separation and purification for obtaining antifreeze peptides in the existing prior patents or literatures, the purification preparation process achieves separation only by the ultrafiltration membrane, the operation is simple, the raw material is easy to obtain, the antifreeze agent yield is high, the production cost is low, the method is suitable for use in minced fillet and products, and the large-scale industrial production is easy.

The invention relates to a nori small peptide chelate manganese compound and a preparation method as well as application thereof. The preparation method comprises the following steps: adding nori into water, adding a proper amount of water-soluble inorganic manganese salt, sufficiently stirring, and adding cellulase and pectinase for composite enzymatic hydrolysis, thus obtaining mixed liquor containing nori protein; adding neutral protease and papain into the mixed liquor containing the nori protein for secondary composite enzymatic hydrolysis, and centrifuging to obtain nori protein small peptide enzymatic hydrolysate; taking the nori protein small peptide enzymatic hydrolysate, stirring and oscillating, centrifuging, measuring a chelation late until the chelation is not changed, and freeze-drying. The prepared nori small peptide chelate manganese compound serves as a pig feed additive with addition amount accounting for 0.1 to 1 percent of the total mass of pig feed. Compared with the prior art, the low-value nori is taken as a protein raw material, and the prepared nori small peptide chelate manganese compound as the pig feed additive can be used to improve the palatability of the feed, effectively increase feed intake of pigs, increase daily gain and enhance the immunocompetence of the pigs.

The invention relates to novel drying equipment for fruit and vegetable dewatering. The novel drying equipment comprises a drying box, wherein an air inlet and an air outlet are formed in the drying box; a hot air circulating set is arranged outside the drying box; an air outlet of the hot air circulating set is communicated with the air inlet through a pipeline; an air inlet of the hot air circulating set is communicated with the air outlet through a pipeline; a solar heating panel is arranged on the hot air circulating set; a heat resistance wire is arranged at the air outlet of the hot air circulating set; the solar heating panel is connected with the heat resistance wire to provide energy for the heat resistance wire; an intelligent controller is arranged on the panel on the outer surface of the drying box; the hot air circulating set and the solar heating panel are connected with the intelligent controller; a box door is arranged on one side of the drying box. The novel drying equipment is simple in structure and convenient to operate; solar energy is used as a drying heat source, so that the energy consumption of the equipment can be obviously reduced, and the environment pollution is alleviated.

The invention relates to the technical field of health-care foods, in particular to a health-care moon cake for protecting eyesight. The health-care moon cake for protecting the eyesight is prepared by flour, honey, perilla oil, hemp seed oil, sea buckthorn fruit residue extract liquid, natural carotene, lycopene, Pullulan, curdlan, fresh corn kernels, carrots, cooked soybean meal, salted duck egg yolks, sea buckthorn juice, sterculia nobilis fruit peeled kernels and the like through stirring, pulp grinding, encrusting, forming, package and other methods. The health-care moon cake is natural and bright in color and luster, non-greasy in taste and rich in comprehensive nutrients for protecting the eyesight, relieves eye fatigue and has an outstanding eyesight protection function.

The invention provides a low-temperature preservation method of modified atmosphere packaged cooked wheaten food. The low-temperature preservation method of the modified atmosphere packaged cooked wheaten food is characterized by comprising the following steps: putting cooked wheaten food into a packaging container; filling the packaging container with a mixed gas of carbon dioxide and nitrogen, and sealing the packaging container; and putting the packaging container into an environment at 2-4 DEG C and storing. The low-temperature preservation method of the modified atmosphere packaged cooked wheaten food, which is provided by the invention, has the beneficial effects that microorganisms such as aerobic bacteria and mould are inhibited from growing and reproducing by utilizing carbon dioxide, so that activities of the microorganisms can be effectively stopped and reduced; the lag phase and the exponential phase of microorganism growth are prolonged; anticorrosion and mildew proof effects are achieved; the anticorrosion period of the cooked wheaten food is prolonged, and the original structure of the cooked wheaten food is helped to keep; nitrogen which cannot react with food and cannot be absorbed by food is poured, so that the microorganisms such as bacteria and mould are inhibited from growing and reproducing; the oxidative deterioration and decay of food are slowed down; the proper ratio of carbon dioxide to nitrogen is selected so as to enable the refreshing time of the cooked wheaten food to be prolonged to 21 days.