366 results about "Peroxide value" patented technology

The present invention is related to the use of novel agents effective for differential killing of abnormal cells such as cancer cells without damaging or being toxic to normal cells. Further these agents may be used for treating a host of ailments including various types of cancers, skin diseases, prevention and reversal of ageing process, prevention of inflammatory reactions, cure of bacterial infections, cure of fungal infections, etc. The agents are prepared by air oxidation of natural oils optionally in the presence of a catalyst wherein the isolated agents have Iodine value 40-60% of the starting oil, Saponification value 20-60 higher than that of the starting oil, Peroxide value 2-3 times that of the starting oil. These agents on saponification and acidification yield free fatty acids and ether linked fatty acid dimmer wherein the dimmer also acts as an active.

The invention provides a two-step decolorization method for phospholipid. The method comprises the following steps of: dissolving the phospholipid by using n-hexane as a solvent, adding a proper amount of hydrogen peroxide into the mixed phospholipid for oxidation and decolorization, and removing most pigment; and performing vacuum heating to remove un-reacted hydrogen peroxide and solvent, adding n-hexane to dissolve the phospholipid in a certain ratio, adding chromatography silica gel in a certain ratio, reacting with stirring, adsorbing peroxide, impurities and partial pigment in the phospholipid, filtering, desolventizing, and thus obtaining decolorized phospholipid. By adopting two-step decolorization, on the premise that the decolorization effect is ensured, the consumption of the hydrogen peroxide is reduced by over 30 percent, and the oxidation degree of the phospholipid in the decolorization process is effectively reduced; and by the adsorption effect of the silica gel, the acid value and the peroxide value of the phospholipid are further reduced, the transparency of the phospholipid is improved, and the quality of the product is effectively improved.

The invention relates to a method for making docosahexaenic acid (DHA) grease through adopting bio-enzyme method wall breaking, comprising the following steps that: Crypthecodinium cohnii(Seligo)Javornicky is taken as starting strain; alga cell is obtained through carrying out continuous cultivation of Crypthecodinium cohnii(Seligo)Javornicky in liquid medium; and then DHA grease is extracted from the alga cell through bio-enzyme method wall breaking. The method has the advantages that: alga cell wall breaking is complete with the wall-breaking rate reaching more than 95 percent; the method does not need a drying step, and can prevent the oxidation of DHA crude oil, thereby ensuring that the peroxide value of extracted grease is extremely low (i.e. the POV value is less than 0.5); moreover, the yield of the extracted grease is more than 90 percent of total oil, while the refining yield is more than 70 percent of crude oil.

The invention relates to the field of agricultural product processing, in particular to an instant preserved flowering cabbage and a production method thereof. The method comprises the following steps of: firstly, preprocessing cruciferous brassica mustard leaf serving as a main raw material; then performing pickling, tank transferring, airing, embrittlement, pure lactic acid bacteria fermentation, nitrite removal, packaging and sterilization; and finally obtaining the instant preserved flowering cabbage, wherein dehydration and/or blending can be performed before packaging. The method has the advantages of low cost and simple process. The instant preserved flowering cabbage produced by the method has the advantages of unique mouthfeel, crisp texture, brownish yellow color and aromatic flavor, wherein the water content is 22 to 45 percent; the salt content is 2 to 6 percent, the total acid content (accounting by lactic acid) is less than or equal to 1 percent; the peroxide value (accounting by fat) is less than or equal to 20 meq/kg; and the ammoniacal nitrogen content is 0.15 to 0.16 percent.

A diester represented by the formula

wherein A represents a cyclohexane ring, cyclohexene ring or benzene ring, X is H or methyl group, R^X and R^Y are the same or different and each is C3-C18 branched-chain alkyl group, C1-C18 straight-chain alkyl group, C2-C18 straight-chain alkenyl or C3-C18 cycloalkyl, provided that when A is a benzene ring, R^X and R^Y are different from each other and —COOR^X and —COOR^Y are attached to two adjacent carbon atoms of the benzene ring, and having the following properties:

1) a total acid number of 0.05 mgKOH/g or less, 2) a sulfated ash content of 10 ppm or less, 3) a sulfur content of 20 ppm or less, 4) a phosphorus content of 20 ppm or less, 5) a peroxide value of 1.0 meq/kg or less, 6) a carbonyl value of 10 or less;

• 7) a volume resistivity of 1×10¹¹ Ω·cm or more, 8) a hydroxyl value of 3 mgKOH/g or less, and 9) a water content of 100 ppm or less, a process for preparing the same and a refrigerator lubricating oil comprising the diester.

The invention provides a method for preparing powdered soybean phospholipids. The method comprises the following steps: extracting hydrated oil sediments with acetone as a solvent; separating out an insoluble substance of the acetone; and drying the insoluble substance of acetone under low temperature in vacuum. The invention also discloses the powdered soybean phospholipids prepared by the method. The powdered soybean phospholipids have color mush slighter than that of the existing powdered soybean phospholipids, and the peroxide value is less than that of the existing soybean phospholipids.

The invention discloses a method for extracting tea seed oil by using an enzymatic hydrolysis method, which comprises the following steps of: airing, unshelling, husking and pulverizing tea seeds; carrying out enzymolysis on the tea seeds in the material-liquid ratios of 1:3 to 1:5 at the extraction temperature of 40-60 DEG C for 1-5h with the enzyme quantity of 40-600U under the pH natural condition; centrifugally layering; adding an organic solvent into centrifugal liquid and extracting; and rotating and evaporating to obtain an oil sample. By adopting the scheme, the method has the advantages of low temperature for equipment operation, low energy consumption, high purity of extracted oil, low content of phospholipid, low acid value and low peroxide value, shallow color, low BOD (Biochemical Oxygen Demand) and COD (Chemical Oxygen Demand) values, easiness of treatment and less pollution, and the oil yield ratio is up to 23.1 percent.

The invention aims to disclose high-bioactivity ganoderma spore oil and a preparation method thereof, and belongs to the field of Chinese medicament. The method comprises the following steps: breaking walls of ganoderma spore powder by adopting a high-energy nano impact mill, performing dry granulation, supercritical CO2 extraction, molecular distillation and purification, and thus obtaining the ganoderma spore oil. The operation process of the method is carried out in an anhydrous environment, so that oxidation of the spore oil in the processing process is reduced, and the obtained product is stable in property; the freezing transparent test time of the ganoderma spore oil prepared by the method exceeds 5.5 hours; and the measured unsaturated fatty acid content is between 60 and 80 percent, the total triterpenoid content is 2 to 3 percent, the total ergosterol content is 2 to 5 mg/g, the ganoderic acid A content is more than 1 mg/g, the peroxide value is less than 5mmol/kg, and the acid value is less than 10 mg KOH/g.

The invention relates to a skate liver oil and a preparation method thereof. The skate liver oil is characterized in that the skate liver oil comprises 0.76-1.13mass% of alkoxy glycerin, 0.71-0.92mass% of squalene, 25-28mass% of EPA and DHA, 1200-1600IU/g of vitamin A, 120-150IU/g of vitamin D, and the other substances which are lipids. The preparation method comprises the following steps: freezing skate livers, unfreezing, chopping, carrying out enzymatic hydrolysis treatment, carrying out enzyme killing treatment after the enzymatic hydrolysis, centrifuging, freezing the obtained emulsion, unfreezing, demulsifying, centrifuging, refining, degumming by citric acid, deacidifying by a caustic soda-soda ash mixture (a mass ratio of caustic soda to soda ash is 2:1), carrying out low temperature treatment, and carrying out evacuating nitrogen-filling packaging. The method has the advantages of reasonable operation, low cost and mild conditions, and the obtained skate liver oil has a very low peroxide value, a very low acid value and no nutrition loss, is rich in vitamin A, vitamin D, EPA, DHA, and important squalene and alkoxy glycerin, has a reinforced healthcare effect, and is easy to preserve and circuit in the market because of the evacuating nitrogen-filling packaging.

The invention discloses a combined reagent for detecting the peroxide value of edible oil and fat and a detection method thereof. The combined reagent comprises a solvent, a reduction reagent and a chromogenic reagent, wherein the solvent is a polar organic solvent for dissolving a sample; the reduction reagent is used for reducing peroxide in the to-be-detected sample; and the oxidized reduction reagent reacts with the chromogenic reagent to produce a colored precipitated complex compound, namely ferric thiocyanate. The invention further discloses the detection method using the combined reagent. The detection method has the benefits that a colorimetry principle is adopted by the combined reagent, and the peroxide value of the to-be-detected sample is detected through reagent discoloration and chroma intercomparison, so that the detection method is simple, convenient and rapid and has high accuracy.

The present invention relates to beef tallow hot pot bottom materials and a preparation method thereof. The beef tallow hot pot bottom materials are mainly prepared by stir-frying the following raw materials of beef tallow, palm oil, lard oil, chicken oil, edible salt, chicken essence, thick broad-bean sauce, chilies, garlic, gingers and shallots. The beef tallow hot pot bottom materials have the characteristics of being mellow in taste, high in product hardness, low in raw material cost, etc. The used palm oil in the beef tallow hot pot bottom materials replaces parts of the beef tallow, so that the product is low in acid value and peroxide value, the hardness of the products is improved, and the product meets the needs of block segmentation, at the same time reduces people's intake of animal fat, and is more conducive to health and lower in raw material costs. In addition, due to the fact that the lard oil and chicken oil are added into the hot pot bottom materials, the products are mellower in compound oil flavor and mouthfeel.

The invention discloses a nondestructive rapid detection method of quality index of shell agricultural products. The method comprises the steps of removing impurities from surfaces of to-be-detected shell agricultural products, cleaning, selecting products with intact shells, dividing into to-be-detected products for modeling and unknown to-be-detected products; placing in closed container, detecting headspace gas by electronic nose to obtain sensor response values; immediately shelling the products for modeling to collect kernels, extracting oil/fat, and determining acid value and peroxide value; establishing regression model between electronic nose response signal and acid value/peroxide value of the products for modeling, selecting the model with high correlation coefficient R as prediction model for shell agricultural product quality; and substituting sensor response values of the unknown products into the prediction model to estimate internal quality. The detection method directly detects quality of shell agricultural products with electronic nose without shelling, and is simple in operation and high in accuracy.

The invention provides a new process for manufacturing zanthoxylum oil by blending zanthoxylum schinifolium and fructus zanthoxyli, relating to the food processing technical field. The new process is as follows: zanthoxylum schinifolium and fructus zanthoxyli are taken as raw material; the blended extractive of the zanthoxylum schinifolium and fructus zanthoxyli is extracted by taking an edible alcohol as a solvent in the vacuum degree of 0.06 to 0.08 Mpa and below the temperature of 60 to 75 DEG C, and then is prepared into the particular zanthoxylum oil by an edible vegetable oil; therefore, the product maintains the intense numb-taste of the fructus zanthoxyli and possesses the peculiar incense of the zanthoxylum schinifolium; the product avoids the shortcoming that the zanthoxylum oilin the traditional process has single incense and numb-taste, the active substances seriously lose in the high temperature, the peroxide value is on the high side; the quality of the pepper oil is extremely increased.

The invention provides a walnut oil refining method; walnut crude oil is prepared into the refined walnut oil by alkali refining, hydration, decoloring, hydrogenation, deodorization and drying; by utilizing multiple technologies comprehensively, the peroxide value of the walnut oil is reduced, the technical difficult point that the walnut oil is easy to oxidize is solved well, and the quality of the walnut oil is improved, the quality of the product is stable and the quality guarantee period of the walnut oil can reach more than 24 mouths. The method has the advantages of rational technology, advanced technology, strong innovativeness and good economic and social benefits.

The invention discloses a fluorosurfactant free of perfluorooctanoic acid as well as a preparation method and a process system of the fluorosurfactant. The fluorosurfactant is a repeated structure unit which comprises at least one oxoperfluoropropenyl and one or a combination of more of perfluoromethoxyl, a Y group and oxoperfluorovinyl and is provided with a carboxyl group or carboxylate at one end. The fluorosurfactant is a fluoropolymer with the C-O-C ether bond structure as the main structural body; in view of indexes, the fluorosurfactant does not contain perfluorooctanoic acid with a 8-C straight-chain structure or salt of the perfluorooctanoic acid, is easily decomposed in nature and is proved to be harmless to human bodies, the peroxide value is 0.001%-0.1%, the surface tension is 10-30 mN/m, and the fluorosurfactant has an amphiphilic structure of a surfactant.

The invention relates to a method for synthesizing perfluoropolyether from perfluoropolyether peroxide. The method is characterized by comprising the following steps of placing the perfluoropolyether peroxide prepared by a photo-oxidation method in an inert fluorine-containing solvent, introducing perfluoroolefine under an ultraviolet irradiation condition, and reacting the perfluoroolefine with the peroxide to form a stable perfluoropolyether compound. According to the method, reaction conditions comprise ultraviolet irradiation and pressure of more than 1.0MPa, and are mild, and the perfluoropolyether compound is easy to industrially produce; the synthesized perfluoropolyether compound has peroxide value of lower than 2*10<-6>mmol/g and molecular weight of more than 1,500; components with different molecular weights can be further obtained by a reduced pressure fractionation method, so that the application fields of the product are detailed, and high economic value is created.

The invention relates to measurement of peroxide values, and in particular relates to an edible oil peroxide value measurement combined reagent and a detection method. The edible oil peroxide value measurement combined reagent comprises a polarity organic solvent, a reducing agent, a color development reagent and a color development stabilizing agent, wherein the polarity organic solvent comprises ethanol with the mass concentration of 237-710 g/L in percentage by mass; the reducing agent comprises ferrous sulfate with the mass concentration of 1-20 g/L in percentage by weight; the color development reagent is a sulfosalicylic acid solution with the mass concentration of 300-1,000 g/L; and the color development stabilizing agent is a pyridoxamine dihydrochloride solution with the mass concentration of 20-800 g/L. By a colorimetric analysis method, the operation is quick and simple, and interference caused by heating on a detection result is reduced; the types of the needed detection reagents is few, and the reagents are convenient to combine and carry; and the edible oil peroxide value measurement combined reagent can develop and detect a plurality of oil samples at the same time, is uniform in developing, is low in toxicity and even non-toxic, and is safe and environmentally-friendly.

The invention discloses a method for preparing high-content phosphatidyl ethanolamine. The method comprises the following steps of dissolving a cephalin crude product as a raw material with an organic solvent, eluting twice with a ternary mixed solvent comprising polyhalogenated alkanes, lower alcohol and water by column chromatography and drying to obtain the phosphatidyl ethanolamine product, wherein the obtained phosphatidyl ethanolamine product is high in content (96.0%-99.9% obtained by an HPLC method), low in content of impurities (in which the content of phosphatidylcholine is less than 0.5%, the content of lysophosphatidylcholine is less than 0.5 %, the content of free fatty acid is less than 0.2%, and the content of triglyceride is less than 0.2%), low in oxidation indexes (of which the acid number is less than 1.0, the peroxide value is less than 1.0 and the anisidine value is less than 5.0), and the product quality meets the quality requirements of drug phospholipid for injecting.

The present invention relates to an electric-nose-analysis-based determination method of tuna oil corruption degree in a storage process, according to the determination method, an electric-nose technology is used for research on volatile odor of tuna oil in the storage process, by principal component analysis (PCA) and linear discriminant analysis (LDA), fish oil samples of different storage time can be distinguished, and acid value and peroxide value forecast models can be established by partial least squares (PLS), so that the tuna oil corruption degree in the storage process can be effectively determined. Compared with the prior art, the determination method is simple in operation, short in detection time and high in detection efficiency, is a fast, effective and comprehensive determination of tuna oil quality, can be widely popularized in fish oil quality measurement.

The invention discloses a Trichosanthes kirilowii Maxim seed processing and storage method, belonging to the technical field of food processing and storage. The method comprises the following steps: (1) selecting raw materials; (2) preparing favoring solution; (3) boiling at high pressure, and flavoring; (4) vacuum drying; (5) vacuum packaging by using composite membranes; and (6) listing or storing bagged products. The method improves the traditional processing technology of Trichosanthes kirilowii Maxim seeds, changes high-temperature quick-frying at 260 DEG C into high-pressure boiling and flavoring at 121 DEG C, inhibits the hydrolytic rancidity and the oxidative rancidity of Trichosanthes kirilowii Maxim seed oil, decreases the acid value and the peroxide value respectively by 39.0 percent and 36.4 percent when being compared with that of the traditional processing method, and prolongs the storage period and the shelf life of the processed products to 6-8 months from the original 2-3 months. The method can be popularized and applied in roasted food processing enterprises.

The invention discloses an edible soy protein isolate/xylan composite film and method of producing the same. The weight percentage content of the soy protein isolate and xylan is (10-5)% and (0-5)%, and the weight percentage content of the plasticiser glycerol adding amount is 0-10%, the light transmittance ratio of the composite film is 50 - 80%, the tensile strength is 1.0-8.0MPa, the elongation at break is 20.0 - 80.0%, the water vapor permeability is 2.0-10.0g*mm/m*d*Pa, and the peroxide number antioxidation performance of the fat is 10.0-50.0Meq/Kg. Adding a xylan will not only makes the composite film have dietary fiber function characteristic, but also the oxygen barrier and the water-blocking film can be improved markedly, respectively improving 4.33-11.46% than the pure soy protein isolate film (for water vapor permeability WVTR characterization) and 5.71-36.97% (to preserve the fat peroxide value POV characterization). The invention has simple method, low cost, and better application prospect in the aspect of the foodstuffs antioxidation.