23results about How to "Low peroxide value" patented technology

The invention discloses microcapsule powder rich in SN-2DHA algal oil and a preparation method of the microcapsule powder rich in SN-2DHA algal oil, and belongs to the technical field of food. The microcapsule powder is prepared from, by mass, 58%-67% of wall materials, 25%-38% of core materials, 0.2%-0.5% of emulsifying agents, 2.1%-3.3% of antioxidants, 0.5%-1% of anti-caking agents, 1%-2% of acidity regulators and 1%-2% of taste regulators, and the wall materials are prepared from cow milk and carbohydrates according to the weight ratio of 1: (1-1.3). Meanwhile, the peroxide value of the algae oil microcapsule powder is also reduced.

The invention belongs to the technical field of organic compounds, and discloses a preparation method of butynediol diethoxy ether and butynediol polyethoxy ether. The preparation method of the butynediol polyethyoxyl ether comprises the following steps: mixing 1, 4-butynediol and a basic catalyst, then adding first ethylene oxide to carry out a first polymerization reaction, and after the reaction is finished, carrying out post-treatment to prepare butynediol diethyoxyl ether; and mixing the butynediol diethoxy ether with second ethylene oxide and a phosphazene salt catalyst, and carrying out a second polymerization reaction to prepare the butynediol polyethoxy ether. The butynediol diethoxy ether prepared by the method is light in color and narrow in molecular weight distribution. The polyethyoxyl butynediol with light color, narrow molecular weight distribution, low peroxide value and small 1, 4-butynediol residual quantity can be prepared by using the polyethyoxyl butynediol as a catalyst of a second polymerization reaction and using phosphazene salt as a catalyst of the second polymerization reaction by using the polyethyoxyl butynediol polyethyoxyl butynediol polyethyoxyl butynediol polyethyoxyl butynediol polyethyoxyl butynediol polyethyoxyl butynediol polyethyoxyl butynediol.

The invention relates to the technical field of eicosapentaenoic acid ethyl ester soft capsules, and discloses a composition containing eicosapentaenoic acid ethyl ester, a soft capsule type preparation, a preparation process and application, eicosapentaenoic acid ethyl ester compounded with various antioxidant auxiliary material components is used as a content, gelatin and Arabic gum are used as wall materials, and the soft capsule type preparation is prepared by compounding the eicosapentaenoic acid ethyl ester and the soft capsule type preparation. A safe and non-toxic polyhedral oligomeric silsesquioxane (POSS) framework compound which is independently researched and synthesized and has a salicylaldehyde group functional group is used as a curing agent, and safe and non-toxic titanium dioxide which is independently researched and synthesized and has the surface modified with the salicylaldehyde group functional group is used as an opacifying agent; and preparing the ethyl eicosapentaenoate soft capsule preparation by adopting a complex coacervation method. The eicosapentaenoic acid ethyl ester soft capsule type preparation prepared by the invention not only has excellent stability under high-temperature and high-humidity conditions, but also has the peroxide value of eicosapentaenoic acid ethyl ester as low as 1.02 meq / kg and the content of eicosapentaenoic acid ethyl ester as high as 98.79%.

The invention discloses a soft capsule coating agent which comprises the following components in percentage by mass: 40-60% of pectin, 15-30% of a humectant, 10-20% of medium chain triglyceride, 10-20% of carnauba wax, 5-10% of hydroxypropyl methyl cellulose and 0.1-10% of glycerol, wherein the humectant is prepared from at least one of sorbitol, xylitol and isomaltitol. The invention also discloses a preparation method of the soft capsule coating agent and a soft capsule containing the soft capsule coating agent. According to the soft capsule coating agent disclosed by the invention, the problems of high-temperature and high-humidity deformation and caking of soft capsules and aging of capsule skins after long-time storage can be improved, and meanwhile, the soft capsule coating agent is good in barrier property and better in protection of soft capsule products.

The invention provides a preparation method and an evaluation method of ozonized oil liposome. The preparation method comprises the following steps: a, preparing ozonized oil, preferably ozonized sunflower seed oil, as a loading object; b, uniformly mixing and stirring ozonized oil, a surfactant and phospholipid to form a uniform and clear oil phase; c, adding deionized water serving as a water phase into the oil phase to form oil-in-water ozonized oil liposome; d, performing ultrasonic treatment on the formed oil-in-water ozonized oil lipidosome by using a cell ultrasonic crusher, so as to form uniform and stable ozonized oil lipidosome; and e, storing the prepared ozonized oil liposome in an environment of 2-8 DEG C. The evaluation method comprises the steps of stability analysis, ozone quality analysis and antibacterial performance analysis. After the ozonized oil is prepared into the liposome, the problems of poor stability and single dosage form of the ozonized oil can be solved.

The invention discloses a preparation method of a carboxyl magnetic starch material, and belongs to the technical field of food safety. The material is prepared by performing enzymolysis on corn starch to form pores, catalyzing sodium hypochlorite to oxidize by TEMPO to introduce carboxyl, and compounding with Fe3O4 (at) SiO2 magnetic nanoparticles. The preparation method comprises the following steps: pretreating ferric oxide to prepare magnetic particles, carrying out enzymolysis on corn starch, carrying out oxidation modification and carrying out water-phase compounding. The material can efficiently adsorb food-borne heterocyclic aromatic amine, the content and peroxide value of heterocyclic aromatic amine in repeatedly used marinating soup or fried vegetable oil are reduced, high-selectivity capture and magnetic separation recovery are achieved, and the material has the advantages of being economical and environmentally friendly.

The invention provides a refining process of camellia oil, and belongs to the technical field of vegetable oil processing, the refining process comprises the following steps: drying and shelling camellia seeds to obtain camellia seed kernels, crushing and sieving the camellia seed kernels, adding an antioxidant additive, and squeezing at low temperature to obtain crude camellia oil; dewaxing the crude camellia oil, and filtering to obtain crude camellia oil; then adding the crude camellia oil into the pretreated macroporous adsorption resin column for sample loading, eluting with an ethanol aqueous solution, centrifugally demulsifying, extracting, and carrying out reduced pressure distillation to obtain purified crude camellia oil; adding modified camellia seed shell activated carbon into the purified crude camellia oil, and performing adsorption decoloration, centrifugation and filtration to obtain decolorized crude camellia oil; and adding the decolored crude camellia oil into a deodorization machine, and carrying out vacuum deodorization to obtain the camellia oil. The obtained camellia oil is high in activity, stable in storage performance and more suitable for cosmetics.

The invention relates to the technical field of food, in particular to a preparation method of high-protein wheat germ nutritional compound granules. The method comprises the following steps: firstly, spraying chitosan on the surface of dry wheat germ powder, and then reducing the moisture content and inhibiting the enzyme activity through microwave treatment; the preparation method comprises the following steps: preparing wheat germ powder, then spraying sodium alginate to obtain stabilized wheat germ powder, finally, compounding the stabilized wheat germ powder with other nutritional ingredients, and carrying out high-pressure homogenization and spray drying to prepare the electuary. Through chitosan coating and microwave treatment, the nutrient retention rate and the storage stability of the wheat germs are remarkably improved, meanwhile, nutrient component loss and hidden danger of chemical additives in a traditional method are avoided, and an efficient and safe solution is provided for industrial application of the wheat germ nutrient compound granules.

This invention discloses a method for extracting fish oil from tuna by-products, a partitioned supercritical fluid extraction (SCFE) device, and the resulting fish oil. The method includes: washing and crushing the by-products into 0.5-5 mm pieces; drying them at 30-40°C under a nitrogen-fluidized atmosphere with an oxygen content below 50 ppm until the moisture content is below 5%; and then processing them using a partitioned supercritical fluid extraction (SCFE) device at 35-40°C and 40-80 MPa. The device is divided into an extraction section and a separation section from bottom to top. The first to fifth layers are extraction trays, and the sixth to Nth layers are separation trays, where N is 12-30. The solid feed inlet is located between the two sections. Supercritical CO2 rises from the bottom of the column. The material descends layer by layer through the extraction section and is discharged from the bottom. Oil-rich CO2 rises, undergoes pre-separation in the separation section, and is then subjected to two-stage pressure reduction separation and filtration to obtain fish oil. This invention allows for continuous and stable operation under high pressure, with uniform mass transfer, resulting in fish oil with low oxidation and high quality.

This invention discloses a method for targeted activation of endogenous enzymes and debittering / fragrance enhancement in flaxseed while maintaining its granular shape. The method includes the following steps: microcrack treatment of flaxseed; spraying an ethanol-water solution onto the surface of the flaxseed to create a slightly moist state; heating and conditioning in a heat-preserving conditioning device to activate the endogenous cyanogenic glycoside hydrolytic enzyme system; short-term heat treatment under closed or semi-closed negative pressure conditions and introducing cyanide-containing exhaust gas into an exhaust gas treatment system; and cooling and tempering to obtain debittered and fragrance-enhanced flaxseed. This invention, through the synergistic effect of microcrack treatment and ethanol-water wetting, effectively activates endogenous enzymes to promote cyanogenic glycoside hydrolysis and removal of volatile cyanide-containing components under extremely low wetting solution addition conditions, while simultaneously inhibiting the hydration and swelling of seed coat mucilage. This results in treated flaxseed maintaining a dispersed granular state and good flowability, suitable for subsequent continuous pressing processing.

The invention discloses stable spherical phosphatidylserine particles and a preparation method thereof.The preparation method comprises the steps that phosphatidylserine generated through an enzymolysis reaction is filtered and then put into an organic solvent to be dissolved, meanwhile, an antioxidant is added, vacuum concentration is conducted till the concentration is 40%-60%, then the obtained concentrated solution passes through a porous membrane to form spherical liquid drops, and the spherical liquid drops are dried to obtain the stable spherical phosphatidylserine particles. Dispersing into an acetone solution in stirring, filtering and drying to obtain the phosphatidylserine spherical particles. According to the preparation technology, the risk that the PS is oxidized is reduced in the preparation process compared with conventional crushing, meanwhile, the prepared particles are uniform in particle size, good in fluidity, large in bulk specific gravity and not prone to oxidation and moisture absorption, and the applicability of the PS is greatly improved.

The invention provides a sterilization method and application of sporoderm-broken ganoderma lucidum spore powder, and belongs to the technical field of health food and medicine processing. The sterilization method comprises the following steps: pretreating wall-broken ganoderma lucidum spore powder through drying and low-temperature ultrasound; after sealing and packaging, carrying out two-section type hot-pressing sterilization treatment; and after sterilization, supercritical CO2 treatment is adopted for post-treatment. According to the invention, low-temperature vacuum drying is matched with low-temperature ultrasonic treatment to realize moisture control and uniform distribution; after sealed packaging, two-section gradient hot-pressing sterilization is adopted, and sterilization thoroughness and thermosensitive component protection are both considered; and finally, residual microorganisms are complementarily killed through supercritical CO2 aftertreatment, oxidized grease is dissolved and removed to reduce the acid value and the peroxide value, meanwhile, oxygen is replaced to delay subsequent oxidation, and no solvent is left. The method is simple and convenient to operate, feasible in industrialization and suitable for processing and production of high-quality health-care foods and medicines.

The invention discloses a walnut oil-alpha-linolenic acid type structure lipid microcapsule and a preparation method thereof, and relates to the technical field of biology, the walnut oil-alpha-linolenic acid type structure lipid microcapsule comprises a wall material, a core material and a compound emulsifier, the wall material is a compound wall material solution, the compound wall material solution comprises soybean protein isolate, beta-cyclodextrin and distilled water, and the core material is a compound emulsifier. The addition ratio of the soybean protein isolate to the beta-cyclodextrin is 1: 3; the core material is walnut oil-alpha-linolenic acid structure grease; the compound emulsifier comprises monoglyceride and sucrose ester, the wall material, the core material and the compound emulsifier are uniformly stirred under the action of a shearing emulsifying machine to form an oil-in-water emulsion, the oil-in-water emulsion is freeze-dried to form the microcapsule, and the preparation method comprises the following steps: preparing the structural grease, preparing the wall material, homogenizing, emulsifying and freeze-drying. The invention provides the preparation method of the structural lipid microcapsule which is relatively high in embedding rate, relatively high in antioxidant protection capability on grease and relatively good in slow release characteristic.

The invention provides a method for reducing peroxide value and anisidine value in ethyl polyenoate, which comprises the following steps: preheating an ethyl polyenoate raw material under the condition of vacuumizing or negative pressure, and pumping the preheated ethyl polyenoate raw material into first-stage molecular distillation equipment through a knockout pump; carrying out molecular distillation by controlling the first-stage molecular distillation temperature at 115-135 DEG C and the mass ratio of the light phase to the heavy phase at (0.5-5): (95-99.5), removing low-boiling-point peroxides and aldehyde and ketone substances through molecular distillation, and collecting a first-stage molecular distillation heavy phase; pumping the primary molecular distillation heavy phase into secondary molecular distillation equipment through a knockout pump; and carrying out molecular distillation by controlling the secondary molecular distillation temperature at 120-150 DEG C and the mass ratio of the light phase to the heavy phase at (95-98): (2-5), removing high-boiling-point peroxides and aldehyde and ketone substances through molecular distillation, and collecting a secondary molecular distillation light phase. By adopting a physical purification principle, the peroxide value and anisidine value of the polyenoic acid ethyl ester are reduced, and the method is high in yield, low in energy consumption, simple to operate and suitable for industrial production.

This application belongs to the field of food ripening technology, specifically relating to a fermentation and enzymatic ripening process for edible butter. This application first discloses a fermentation and enzymatic ripening process for edible butter, which involves adding citric acid and yeast extract to fresh butter, and then using *Lactococcus lactis* and *Leuconostoc mesenteroides* for co-fermentation and enzymatic hydrolysis, supplemented by washing and settling steps, to form a unique fermentation and enzymatic ripening process. This fermentation and enzymatic ripening process can effectively increase the content of flavor substances such as diacetyl, acetoin, caprylic acid, δ-decanoic acid, 2-nonanone, and decanoic acid in ripened edible butter, thereby enhancing the sensory flavor of the ripened edible butter. Unexpectedly, the shelf life of the resulting ripened edible butter is also extended, specifically manifested in extremely low initial acid value and peroxide value, and minimal change in acid value and peroxide value after storage under accelerated aging conditions.

The invention provides a method for improving oxidation stability of vegetable fat, which specifically comprises the following steps: S1, adding polyphenol, carotenoid and gallic acid into the vegetable fat, and emulsifying to obtain a mixed oil solution; s2, adding a stabilizer and a crystallization inhibitor into the mixed oil solution, standing and filtering to obtain a transparent oil solution; s3, adding a ferric sulfate solution and a copper sulfate solution into the transparent oil solution to obtain the vegetable fat with high oxidation stability. The polyphenols, the carotenoid and the gallic acid are added to achieve a synergistic effect, so that the oxidation stability of the grease is improved; phospholipids in the grease are complexed with metal ions, so that the oxidation resistance of the grease is improved; in addition, polyphenol, carotenoid, gallic acid and metal ions form a complex, the oxidation resistance of grease is enhanced, and the application range in the fields of food and the like is widened.

This invention discloses a method for low-temperature pressing purification and dewaxing of Torreya grandis kernels, comprising at least the following steps: S5.1 Pre-preparation of a composite filter layer: After pre-cooling the filter chamber of a vacuum filtration device, a filter screen and a filter membrane are laid in sequence, and nitrogen is introduced to remove impurities; S5.2 Gradient negative pressure filtration: The initially dewaxed oil is injected into the filter chamber at low temperature, first pre-filtered at -0.05MPa to -0.06MPa for 10 minutes, then deep filtered at -0.08MPa to -0.09MPa for 20 to 30 minutes to retain trace wax crystals; S5.3 Nitrogen purging to remove water: The dewaxed oil is introduced into a low-temperature oil storage tank, and nitrogen is continued to be introduced to remove water and prevent oxidation; S5.4 Finished product fine filtration: The dewaxed oil is slowly heated and then finely filtered through a filter screen to obtain Torreya grandis finished oil. Gradient negative pressure filtration retains trace wax crystals in Torreya grandis oil. This invention employs a gradient negative pressure dewaxing step, which ensures sufficient driving force to accelerate the filtration speed and utilizes the formed filter cake layer as a secondary filtration medium to efficiently retain trace amounts of residual wax crystals. This approach ensures a high dewaxing rate while shortening the filtration time and improving production efficiency.

The invention provides olive oil with repairing, soothing and anti-wrinkle functions and a preparation method and application thereof, and belongs to the technical field of cosmetics, the preparation method comprises the following steps: mashing and sieving olive fruits to obtain olive pulp; performing rotary evaporation on the olive pulp, then adding water, mixing, and centrifuging to obtain supernate and olive pomace; separating the supernate to obtain crude olive oil I; mixing olive pomace with water, and performing ultrasonic treatment, enzymolysis and sterilization to obtain pomace pretreatment liquid; inoculating zymophyte into the pomace pretreatment liquid for fermentation, and sterilizing to obtain pomace fermentation liquid; centrifuging the pomace fermentation liquor to obtain supernate; separating the supernate to obtain crude olive oil II; mixing the olive crude oil I and the olive crude oil II, then adding a modified adsorbent, heating, stirring and filtering to obtain olive crude oil; and performing vacuum deodorization on the olive crude oil to obtain the olive oil. The olive oil prepared by the invention has stable performance, is suitable for cosmetics, and has good repairing, soothing and anti-wrinkle effects and the like.

The application discloses a vertical variable-temperature pressure-difference quantitative puffed nut kernel crisp processing method and a puffing equipment, and relates to the field of food processing and treatment. The method comprises the following steps: after the nut kernel raw material is cleaned and soaked, standing and draining; the pretreated nut kernel is loaded into a hanging basket in a vertical puffing tank, steam is introduced into the vertical puffing tank, the nut kernel is subjected to steaming treatment, the vertical puffing tank is heated, the water in the nut kernel is vaporized, the pressure in the tank is increased and the tank is kept warm; the pressure relief valve between the vertical puffing tank and the vacuum tank is quickly opened, the pressure in the vertical puffing tank is instantaneously reduced, the water in the nut kernel is flash evaporated, the volume of the nut kernel is expanded, and a honeycomb structure is formed; the nut kernel is continuously heated and dehydrated under vacuum until the water content of the nut kernel is reduced; heating is stopped, and the nut kernel is cooled to room temperature; and the micro-puffed crisp nut kernel is obtained. Through the above steps, the quality problems of the existing nut kernel, such as hard taste, easy oxidation, great loss of nutrients, short shelf life and serious homogenization after high-temperature roasting and frying processing, can be solved.

The invention provides a composition for inhibiting oxidation of horse oil and application of the composition, and belongs to the technical field of horse oil preparation. The invention provides a composition for inhibiting oxidation of horse oil. The composition comprises a water-soluble antioxidant and a fat-soluble antioxidant, the water-soluble antioxidant comprises tea polyphenol and / or a water-soluble rosemary extract; the fat-soluble antioxidant comprises a fat-soluble antioxidant 1 and a fat-soluble antioxidant 2, the fat-soluble antioxidant 1 is rosemary leaf oil, and the fat-soluble antioxidant 2 comprises at least one of the following raw materials: tocopherol, tea polyphenol palmitate, ascorbyl palmitate and ascorbyl tetraisopalmitate. According to the composition provided by the invention, the stability of the horse oil can be improved, the shelf life of the horse oil is remarkably prolonged, and the shelf life of the horse oil can be prolonged from 248 days to 927 days. The horse oil prepared by the method disclosed by the invention is uniform in color and luster, free from rancidity, free from unpleasant odor and relatively low in peroxide value.

The invention belongs to the field of vegetable oil refining, and particularly discloses a physical refining method of flax shell oil, which comprises the steps of pretreatment, flax shell crushing, cold pressing, high-frequency pulsed electric field treatment, adsorption resin filtration, pre-degassing, molecular distillation, ultrafiltration and the like. And the flax shell oil with high purity, strong oil fragrance, low acid value and peroxide value and high unsaturated fatty acid content is obtained. Wherein the pretreatment comprises the steps of drying, coarse grinding separation, vibration screening, electrostatic separation, winnowing and the like, and thorough separation of flax shells and seed kernels is ensured; impurities and bad components are effectively removed through the steps of cold pressing, high-frequency pulsed electric field treatment, adsorption resin filtration and the like. The pre-degassing and molecular distillation further improve the purity and quality of the oil, and the ultrafiltration step ensures the stability and uniformity of the final product. The waste flax shells in the prior art are used for oil pressing, waste is turned into wealth, and the flax shell oil product is high in quality and has wide application prospects.

The invention relates to the field of edible oil extraction, and discloses a sesame oil extraction process, which comprises the following steps: raw material pretreatment: carrying out primary treatment on sesame through cleaning, drying and crushing; carrying out enzymatic assisted cell wall rupture, and carrying out composite degradation on the cell wall by utilizing cellulase, pectinase and protease; subcritical fluid extraction: extracting the sesame oil by using a solvent such as butane or propane under low-temperature and low-pressure conditions; oil refining: removing impurities and improving the oil quality through physical filtration, enzymatic degumming and vacuum deodorization; and packaging a finished product, namely filling the refined sesame oil into a light-proof sealed container. Compared with a traditional process, the method has the advantages that the oil extraction rate and the functional component retention rate are remarkably increased, the peroxide value is reduced, the extraction time is remarkably shortened, and the method is high in process adaptability, environmentally friendly, capable of saving energy and suitable for industrial popularization.

The application belongs to the technical field of soybean phospholipid, and particularly relates to an enzymatic soybean lecithin with whitening and anti-aging effects, a preparation method and application thereof. The preparation method comprises the following steps: (1) taking soybean powder phospholipid, adding solution A, stirring, centrifuging, and obtaining a precipitate; (2) adding anhydrous ethanol to the precipitate, standing, concentrating the supernatant, and obtaining a concentrated solution; (3) adding a composite enzyme and a buffer solution to the concentrated solution for enzymolysis, drying, and obtaining crude phospholipid; (4) eluting the crude phospholipid through a silica gel-aluminum oxide column, collecting and concentrating the eluent, and drying, to obtain the enzymatic soybean lecithin; wherein the solution A in step (1) is a mixed solution of acetone, methanol and a citric acid aqueous solution. The prepared enzymatic soybean lecithin has high purity, good activity and high hydrophilicity, and has significant whitening and anti-aging effects.