68results about How to "Inhibition of oxidative deterioration" patented technology

The invention discloses an edible biological preservative film and a preparation method thereof. The edible biological preservative film comprises the following components in parts by weight: 30-60 parts of a film former, 1-10 parts of a natural antioxidant, 1-10 parts of a natural bacterial inhibitor, 1-4 parts of a plasticizer and 0.5-4 parts of an emulsifier. The preparation method comprises the following steps: mixing the components in proportion to form preservative film liquid, and preparing the preservative film by adopting a tape-casting process. According to the preservative film, excellent film forming performances of materials such as marine polysaccharides, chitosan, gelatin and the like are utilized, the natural antioxidant and the natural bacterial inhibitor are selected and used, and the modification process is carried out through the plasticizer, the emulsifier and the like, so that the prepared preservative film is good in mechanical property, delays the spoilage of an aquatic product and can effectively prolong the shelf life of the aquatic product.

The invention relates to a preparation method of instant crisp okra slices. The preparation method mainly comprises the following steps: selecting; blanching; slicing; quick-freezing; vacuum frying and pre-puffing; vacuum deoiling; separating fruits from seeds; spraying; puffing again; and packaging. The instant crisp okra slices prepared by the method provided by the invention are low in oil ratio, crisp rather than greasy and stable in quality, and the original shape, flavor and nutritional quality of okra are maintained.

Provided is an anti-fog coating composition. When applied and dried even under high-humidity conditions, the anti-fog coating composition rarely suffers from blushing. Further, the anti-fog coating composition can be heat-cured even at low temperature in a short time and can form a coating film that exhibits excellent tight adhesion to a substrate and excellent heat resistance and anti-fog properties. The anti-fog coating composition comprises (A) a copolymer, (B) a basic compound such as amine, and (C) a surfactant such as anionic surfactant, said copolymer (A) being a copolymer prepared from a monomer mixture that comprises (A1) a vinyl monomer that has an N-methylol group or an N-alkoxymethylol group, (A2) a vinyl monomer that has a sulfonic acid group, and (A3) an alkyl (meth) acrylate monomer.

To provide a method in which the deterioration of an anion exchange membrane within a short period can be prevented effectively, and which can produce highly pure quaternary ammonium hydroxide steadily for a long period without the need of replacing the membrane with new one. ¢MEANS FOR SOLVING PROBLEMS! Disclosed is a method for producing quaternary ammonium hydroxide by arranging an anion exchange membrane and a cation exchange membrane between electrodes and supplying an aqueous solution of a halogenated quaternary ammonium salt to a stock solution chamber facing the side of a cathode of the anion exchange membrane to carry out the electrolysis. In the method, a membrane comprising a base layer (31) and a surface layer (33) formed on one surface of the base layer (31) and having a highcrosslinking density is used as the anion exchange membrane, and the anion exchange membrane is so arranged that the surface layer is positioned on the side of an anode (1) to carry out the electrolysis.

The invention relates to the field of oil product additives, in particular to a composite high-cleanness fuel oil additive and aims at providing a composite high-cleanness fuel oil additive for improving the dynamic properties, cleanness and corrosion and abrasion resistance of fuel oil and a preparation method thereof. The composite high-cleanness fuel oil additive is prepared from, by mass, a detergent main agent 10-60%, an anti-abrasion agent 0-10%, a corrosion inhibitor 0-10%, an antioxidant 0-5%, carrier oil 15-40% and the balance a thinner, wherein the detergent main agent is one or more of polyisobutylene phenol mannich base, PEA polyether amine and polyisobutylene amide. The fuel oil adopting the composite additive has good cleanness, the colloid, carbon deposition and coking at automobile jet nozzles, throttle valves, combustion chambers and other parts can be obviously reduced, the abrasion of components of a fuel system can be reduced, the oxidative deterioration of the fuel oil and the additive can be inhibited, and the harmful substances in engine tail gas emissions can be reduced.

The invention discloses a preservation method of premade bass. The preservation method comprises specific steps as follows: the bass is pretreated, pickled in a prepared preservation solution and treated with a fermented soybean extracting solution, the pickled fish coated with the fermented soybean extracting solution is subjected to several steps of vacuum packaging, super-high-pressure treatment and low-temperature storage and the like. The bass is pickled with common seasoners such as fresh ginger juice, cooking wine, table salt and the like firstly, then coated with a fermented bean product, namely, the fermented soybean extracting solution which has a unique flavor and contains a large quantity of active substances and treated with a super-high-pressure technique finally, breeding of putrefying bacteria can be controlled effectively, oxidative deterioration of the product in the storage process can be inhibited, the flavor and the taste of fish are retained, the shelf life of the product is prolonged, the variety of the flavor of the product is enriched to a certain extent, and the premade bass has remarkable market and economic benefits.

The invention discloses an extracting method of mango seed essential oil and application thereof in refreshment of pitaya. The extracting method of the mango seed essential oil comprises the following steps: drying, pulverizing, microwave pretreatment, super-critical CO2 extraction and two-stage molecular distillation. Mango seed crude essential oil obtained by super-critical CO2 extraction is subjected to second-stage molecular distillation to obtain mango seed essential oil, and the mango seed essential oil extracted by the extracting method of the mango seed essential oil is high in purity and small in purity. The mango seed essential oil is applied to refreshment of the pitaya, bacteria on the surface of the pitaya, inside the pitaya and in a storage environment can be killed, bacteria attack is prevented effectively, meanwhile, the mango seed essential oil has effects of resisting oxidation and clearing free radicals of the pitaya, brown stain of the pitaya is inhibited, melanin is inhibited, meanwhile, procyanidine in the pitaya can protect a fresh-keeping film of the pitaya against being decomposed, by the fresh-keeping film, the consumption speed of nutrients of the pitaya is reduced, rot and deterioration of the pitaya is slowed down, and the shelf life of the pitaya is prolonged.

The invention discloses a method for preparing a bee venom injection, which comprises the following steps of: (a) weighing bee venom, water for injection and octanol in a mass-to-volume ratio of 1:(20-30):(5-7); (b) dissolving the bee venom in the water for injection and then adding the octanol for extraction; separating extract liquor by using a sephadex column; and (c) freezing the bee venom for 1-2h at the temperature ranging from -10 DEG C to -15 DEG C; diluting the frozen bee venom solution to an specific amount with a prepared buffer solution; carrying out ultrafiltration by using ultrafiltration equipment, adding 0.05-0.1% of glycine, stirring, carrying out rough filtration and fine filtration and finally packaging. The bee venom injection prepared by the method has the advantage of stable quantity and high percent of pass.

The invention discloses a production method of vacuum browning-resistant quick-frozen fruit dices. The production method concretely comprises the following steps: 1, selecting a raw material; 2, immersing: putting the selected raw material in a color protection solution composed of water, D-sodium erythorbate and citric acid, and carrying out color protection; 3, dividing the raw material, and coring the raw material; 4, disinfecting the cored raw material in a D-sodium erythorbate solution; 5, putting the disinfected raw material in a sulfur-free liquid protection solution, and carrying out primary color protection; 6, dicing the raw material; 7, carrying out vacuum pumping, and carrying out secondary color protection; 8, quickly freezing color protected dices; 9, choosing the quick-frozen dices, and bagging the dices; 10, carrying out metal detection; and 11, storing the obtained dices. The special color protection solution is in favor of improving the color protection effect and shortening the color protection time, has obvious color protection and brittleness protection effects, and substantially reduces the fruit yellowing rate; and a blanching process is reduced, so energy consumed in the processing process is reduced, the hardness, the crispness, the color, the mouthfeel and other quality indexes of quick-frozen apple dices are improved, and the storage and shelf life of the above product is prolonged to 2 years, thereby the product has high hardness and good mouthfeel, pollution to environment is reduced, and the production efficiency of enterprises is improved.

The invention belongs to the technical field of food biology, and particular relates to an instant yolk oligopeptide-phosphatide type DHA double-effect dietary supplement and a preparation method thereof. The preparation method comprises the following steps of performing high-density fermentation so as to obtain microalgae powder of which the DHA content is 25-35%, adding the DHA microalgae powderto a laying hen ration to obtain strengthened eggs of which the DHA content is 200-400mg / 100g, performing pretreatment and continuous hydrolysis on DHA strengthened yolk liquid to obtain DHA strengthened yolk hydrolysate, and performing vacuum concentration refined fishy smell elimination, emulsifying, homogenizing, spray drying and boiling granulation on the yolk hydrolysate so as to obtain theinstant yolk oligopeptide-phosphatide type DHA double-effect dietary supplement. The method disclosed by the invention has the advantages of being simple in technology, free from environmental pollution, high in product yield and the like; and the total protein content of the instant yolk oligopeptide-phosphatide type DHA double-effect dietary supplement is higher than 45%, the proportion of yolkoligopeptide components in the total protein is higher than 50%, the content of DHA in the product namely the instant yolk oligopeptide-phosphatide type DHA double-effect dietary supplement is 1-3%, the maltodextrin content is 5-25%, and the instant yolk oligopeptide-phosphatide type DHA double-effect dietary supplement is particularly suitable for nutrient requirement crowds of sub-health crowds,babies at the growth and development period, women at the pregnancy period or the lactation period, postoperative patients, crowds suffering from disturbance of digestion and absorption, old people suffering from slow metabolism, and the like to eat.

The invention discloses a freshness preservation and storage method of organic rice. According to the freshness preservation and storage method of the organic rice, a lactic acid bacterium fermentation product containing natural antioxidants is taken as a freshness preservation agent, wherein the lactic acid bacterium fermentation product contains multiple active antioxidant ingredients which arecapable of effectively inhibiting oxidative deterioration of the rice, as well as inhibiting growth of mildews, so that the lactic acid bacterium fermentation product is a safe and beneficial freshness preservation agent; moreover, pretreatments are performed on the rice by using supercritical fluid so as to improve adsorption capacity of the freshness preservation agent on surface of the rice sothat the treated rice has increased surface adsorption, and thus, adsorption between the rice and the freshness preservation agent is increased so as to realize effective adsorption of the freshness preservation agent; and finally, modified atmosphere packaging treatment is performed on the organic rice coated with the freshness preservation agent so that the treated organic rice has much longer shelf life and quality retention period compared with products of the same kind, and thus, the organic rice is very competitive in the market.

The invention discloses a boiled dumpling rich in unsaturated fatty acids. The boiled dumpling comprises a boiled dumpling wrapper and boiled dumpling stuffing, wherein the boiled dumpling wrapper is added with linseed meal, and the boiled dumpling stuffing is added with the linseed meal and Plukenetia volubilis flour. According to the boiled dumpling rich in unsaturated fatty acids, the boiled dumpling wrapper is properly added with the linseed meal, so that the frost crack resistance and taste of the boiled dumpling wrapper are improved; the boiled dumpling stuffing is added with the linseed meal and the Plukenetia volubilis flour, so that the water retention property, taste and nutritive value of the boiled dumpling stuffing are improved; particularly, the boiled dumpling is rich in unsaturated fatty acids, the boiled dumpling stuffing can be effectively inhibited from oxidative deterioration during frozen preserving, the texture, taste, nutrition and oxidation resistance of quick-frozen boiled dumplings are improved, and the quality defect of the traditional quick-frozen boiled dumplings is overcome.

The invention provides edible beef tallow and a preparation method thereof. The method comprises the following technological steps of pretreating raw materials, performing microorganism thermophilic fermentation, performing microwave-assisted semi-dry method enzymolysis, performing thermophilic simmering in a covered pot over a slow fire, performing separation for making oil, performing decoloringand the like. Multiple steps are combined for united oil extraction, so that the cholesterol content in the beef tallow is effectively reduced, peculiar smell and impurities in the beef tallow are removed, and the yield of the edible beef tallow is increased. Besides, fresh clean intact healthy beef fat tissue is used as a raw material, and edible ethanol, white sugar and nine-taste bags are selected for removing peculiar smell of beef fat tissues, improving flavor of raw materials and restraining oxidative deterioration of the beef fat tissues; the prepared edible beef tallow is rich in thekinds of unsaturated fatty acids of linoleic acid, linolenic acid and the like, is higher in content of unsaturated fatty acids, and rich in activity and flavored components, the whole preparation course is free from addition of acid base organic solvents and non-edible organic solvents, and products are safe to eat, comprehensive in nutrients, low in cholesterol content, high in oxidation resistance, better in mouth feel and taste, longer in quality guarantee period and wide in application range.

The invention discloses a flavonoid compound with antioxidation activity, and a preparation method and application thereof. The flavonoid compound is separated from tobacco rootstock, has the molecular formula C18H16O5, and has the following structural formula: (the formula is as shown in the description); the compound is named as 2'-hydroxyl-7-(2-hydroxyethyl)-8-methoxy-flavone, and the English name is 2'-hydroxyl-7-(2-hydroxypropyl)-8-methoxy-flavone. The flavonoid compound is prepared from the tobacco rootstock serving as the raw materials through extractum extraction, silica-gel column chromatography and high performance liquid chromatography separation. The experiment result shows that the compound has high antioxidation activity and free radical scavenging activity, serves as a perfume antioxidant, can effectively inhibit oxidative deterioration of the perfume, obviously prolongs the shelf life and does not influence the smoking quality of cigarette.

The invention provides a liquid crystal aligning agent, a liquid crystal alignment film and a liquid crystal display device. The liquid crystal aligning agent contains: A, at least one polymer (a) selected from groups consisted of polyamic acid and polyimide, wherein the polyamic acid is obtained by reacting tetracarboxylic dianhydride with diamine, and the polyimide is obtained by dehydrating the polyamic acid so as to close ring; B, an antioxidant (b); C, at least one solvent (c) selected from groups consisted of 1,3-dimethyl-2-imidazolidinone, N-ethyl-2-pyrrolidinone, and a compound represented by a formula (1).

The present invention relates to a preparation method for wear resistance nylon PA66 containing a novel antioxidant, wherein 100 parts of wear resistance nylon PA66, 5-20 parts of a wear resistance agent molybdenum disulfide, 1-5 parts of a wear resistance agent titanium dioxide, 0.1-1 part of an organic antioxidant, and 0.1-1 part of a metal antioxidant titanium powder are uniformly mixed and then are subjected to melting extrusion granulation through a twin-screw extruder to prepare the wear resistance nylon PA66. The wear resistance nylon PA66 has excellent wear resistance and good mechanical property.

The invention discloses red date and black tea bread. The red date and black tea bread is prepared from the following raw materials: red dates, black tea, wheat flour, wheat bran, Chinese honeylocust fruit kernels, mussel powder, pork jelly, cocoa powder, mulberry wine, sea cucumber polypeptide, stevia leaves, prepared rehmannia roots, scoparius, Yumeiren, honey, yeast powder, table salt, water and wheat-germ oil. The wheat bran is processed and modified, biological activity is damaged, a raw taste is removed and the effect of function components of the wheat bran is kept to the greatest extent; the content of water-soluble dietary fibers is improved, dough has relatively stable performances and can be kneaded for long time and the chewiness is enhanced; and nutrient components of the red dates and the Chinese honeylocust fruit kernels are matched and are cooperated with the function components including the prepared rehmannia roots, the scoparius and the like, so that the product has the functions of nourishing yin and keeping health, nourishing blood and maintaining beauty.

The invention discloses a heat-resistant anti-aging SBS modified asphalt waterproof coiled material. The coiled material is prepared from, by weight, 100 parts of asphalt, 6-10 parts of SBS, 2-4 partsof ferric chloride, 10-18 parts of anti-aging agent, 20-30 parts of ceramic silicone rubber powder, 1-3 parts of polytetrafluoroethylene micro-powder, 15-25 parts of naphthenic oil, 0.4-1 part of silane coupling agent and 30-50 parts of white carbon black; the anti-aging agent is prepared from, by weight, 10 parts of modified magnesium-aluminum carbonate hydrotalcite, 1-2 parts of tetramethylpiperidine, 4-6 parts of butylated hydroxytoluene, 2-3 parts of 2,4'-dihydroxybenzophenone, 3-5 parts of 2,4,6-tri(2-hydroxy-4-butoxy-phenyl)-1,3,5-triazine and 0.6-1 part of nano titanium dioxide. According to the coiled material, the asphalt is modified through the synergy of SBS, the ceramic silicone rubber powder and the polytetrafluoroethylene micro-powder, the comprehensive performance of the waterproof coiled material is obviously improved, the produced waterproof coiled material can effectively block ultraviolet rays and eliminate free radicals, and has the excellent aging resistance, decontamination, acid resistance, alkali resistance and high temperature resistance.

The invention belongs to the technical field of fruit and vegetable fresh keeping, and particularly discloses a litchi fresh keeping method. The litchi fresh keeping method comprises the following steps: (1) picking fruits: picking fresh litchi which is 80 percent mature and has no disease and injurious insects and no injury; (2) performing heat treatment: blanching by adopting hot water; (3) treating in a soaking solution, soaking the litchi by adopting the soaking solution which is obtained by mixing citric acid, sodium chloride and propyl gallate; (4) treating the litchi by using a fresh keeping agent: spraying the fresh keeping agent prepared from cinnamon leaves, green tea, lactobacillus plantarum, bacillus subtilis, glucocyamine chitosan, gulcomannan and the like; and (5) storing. Byadopting the litchi fresh keeping method of the invention, the sensitivity of the litchi to the storage environment can be effectively reduced, the oxidation deterioration of the litchi can be inhibited, the nutrient content of the litchi can be effectively kept, the fresh keeping time of the litchi can be prolonged, and the fresh keeping effect is good.

The invention provides a refrigerator, which can inhibit the nutrition components in the foodstuff contained in a pressure-reduction storage chamber from being oxidated and deteriorated in a long term. the refrigerator (1) comprises the pressure-reduction storage chamber (24) arranged in the refrigerator and having an internal pressure reduced to be lower than the atmospheric pressure, a deoxidizer (81) is arranged in the pressure-reduction storage chamber (24), the deoxidizer (81) is an antioxidant containing inorganic components and organic components, which is disposed in an antioxidant box (80), the antioxidant box (80) can prevent the air guided under the atmospheric pressure, the air guided under the condition that the antioxidant box (80) at lower pressure than the atmospheric pressure is more than the air guided under the condition that the antioxidant box (80) at the atmospheric pressure, to reduce the oxygen in the pressure-reduction storage chamber (24).

The present invention provides an oxygen-absorbing resin composition which is excellent in oxygen-absorbing performance, suppresses oxidative deterioration of the resin during molding, and does not cause coloring during molding. The present invention provides an oxygen-absorbing resin composition comprising a hydrogenated styrene-diene copolymer (A), a thermoplastic resin (B) having an ethylene structure in its molecular structure, and a transition metal catalyst (C), and the oxidation of the thermoplastic resin (B) is carried out by the copolymer (A) as an initiator to absorb oxygen. Here, the copolymer (A) preferably contains a carbon-carbon double bond derived from a diene in the range of 1×10-5 to 1×10-2 eq / g.

The present invention relates to a preparation method for wear resistance nylon 1010 containing a novel antioxidant, wherein 100 parts of wear resistance nylon 1010, 5-20 parts of a wear resistance agent molybdenum disulfide, 1-5 parts of a wear resistance agent titanium dioxide, 0.1-1 part of an organic antioxidant, and 0.1-1 part of a metal antioxidant titanium powder are uniformly mixed and then are subjected to melting extrusion granulation through a twin-screw extruder to prepare the wear resistance nylon 1010. The wear resistance nylon 1010 has excellent wear resistance and good mechanical property.

Belonging to the technical field of food fresh-keeping equipment, the invention relates to an energy-saving and environment-friendly high temperature food vacuum quick cooling machine, and solves the technical problems of high temperature food quick vacuum aseptic cooling in the prior art. According to the invention, the cooling temperature is uniform, and the circumstance of cold outside and warm inside cannot occur. The quick cooling machine has quick cooling speed, and is energy-saving and environment-friendly, quickly cools marinated food just taken out of a pan, inhibits oxidative deterioration of microorganisms under a high temperature condition, improves the color, aroma and taste of food, prolongs the freshness period. According to a solution, a shell of the energy-saving and environment-friendly high temperature food vacuum quick cooling machine is internally provided with a cooling box, the front surface of the shell is equipped with a revolving door, a separator is disposed above a primary pump, a condensate fan is arranged behind the primary pump, and a compressor is disposed at the front on one side of the condensate fan; a liquid discharge valve is disposed on a side wall of a water storage tank, a secondary pump is arranged above the water storage tank, and a secondary pump liquid output end is communicated with the compressor through an expansion valve and a liquid supply valve in order. The invention correspondingly provides a use method of the energy-saving and environment-friendly high temperature food vacuum quick cooling machine.