79results about How to "Avoid oxidation loss" patented technology

The invention discloses an extracting polyphenol, theanine, tea polysaccharide and tea pigment method from tea, which is characterized by the following: using deionized water for lixiviating tea at constant temperature with continuous flow upstream at multi-speed; adopting microstrainer to dislodge the foreign matter of raffinate; using hyperfiltration for putting-off pectin and protein; concentrating by hyperfiltration and dehydration; extracting tea polyphenol by acetic acid ethyl ester and recovering dissolvant; stripping caffeine of extracting extract phase, pesticide residue and dissolvant by CO2 supercritical fluid; getting tea polyphenol by low-temperature nitrogen spray-drying; using alcohol separation and low temperation vacuum drying by hyperfiltration trapped fluid to prepare tea polysaccharide; separating alcohol recrystallization by basic copper carbonate and hydrogen sulfide to get theanine; using enzymatic oxidation and alkaline air to oxygenate remain polyphenols substance of liquid phantom; getting tea pigment by hyperfiltration dehydration compression and vacuum drying; merging caffeine form carbon dioxide above-critical fluid and caffeine from carrene; recovering dissolvent; using deionized water for washing; obtaining caffeine by recrystallization vacuum drying.

The invention discloses a preparation method for a tea extract, belonging to the technical field of extraction of effective components of tea leaves. The preparation method comprises the following steps: firstly, carrying out low-temperature rapid freezing treatment on high-quality commercial tea leaves; then immediately crushing; then combining a high-voltage pulsed electric field (PEF for short) technology, an ultrasonic treatment technology and a low-temperature enzymolysis technology; and carrying out low-temperature extraction in a whole process. According to the preparation method for the tea extract, the loss of effective components, caused by high-temperature processing, is avoided, and the extraction rate of the effective components of the tea leaves is also improved. The process is simple and low in cost; the introduction amount of extraneous food additives, processing auxiliary agents and chemical substances is reduced; the natural nutritional ingredient and the flavor of the tea leaves are kept to the greatest extent, the low-carbon production is realized and the environment is protected.

The invention discloses a method for recovering copper from cyanic waste water and relative wastewater treatment method, belonging to non-ferrous metallurgy and environmental protection field. It is characterized in that it combines diaphragm electrodeposition with part of acidification, adds acid into electrodeposition liquid and aerates to blow off and recover free CN-, which greatly increases cathodic current efficiency; it employs diaphragm electrodeposition, that is to employ cationic exchange membrane to separate free cyanogen and metal- cyano complex from anode, to avoid cyanogen oxidation in anode; the waste electrodeposition liquid can be reused in cyanogen extraction process, or discharged after further treatment.

The invention discloses a freeze-dried fruit and vegetable product suitable for people suffering from dysmasesis. The freeze-dried fruit and vegetable product is prepared by mixing raw materials in parts by weight as follows: 10-30 parts of wheat germs, 20-40 parts of milk powder, 1-10 parts of corn peptides, 1-10 parts of rice peptides, 100-300 parts of cabbages, 100-300 parts of carrots, 100-300 parts of broccoli, 100-300 parts of tomatoes, 200-350 parts of Chinese yams, 300-500 parts of apples, 300-500 parts of bananas and 30-80 parts of sucrose powder. The processed freeze-dried fruit and vegetable product has rich fruit and vegetable tissue ingredients and nutritional ingredients of the milk powder, the corn peptides, the rice peptides and the like, adopts a reasonable formula, has comprehensive nutrition and fragrance of fruits and vegetables and is easy to chew and blend, and a nutritional product supplementing fruits and vegetables is provided for the people suffering from dysmasesis.

The invention discloses a compound antifreeze agent and application thereof and belongs to the field of food processing. The compound antifreeze agent in the formula comprises the following components in parts by weight: 2 to 8 parts of antifreeze polypeptide, 2.5 to 4.5 parts of trehalose and 0.2 to 0.5 part of polyphosphates. According to the compound antifreeze agent disclosed by the invention, the antifreeze polypeptide is taken as a main protecting agent and is combined and compounded with micromolecules to obtain a high-efficiency compound low-temperature protection formula; by using the high-efficiency compound low-temperature protection formula, the stability of minced fish products can be better kept in the low-temperature storage process of the minced fish products, the gel strength and the water holding capacity of surimi products are improved, and the protection can be provided for low-temperature storage and transportation of the surimi products; a preparation process of the antifreeze polypeptide is mature and simple and low in production cost, and is suitable for industrial production; in addition, the antifreeze polypeptide is high in low-temperature protection activity and sweetness-free, and can be used for keeping the flavor of the surimi products.

A rotor of rotary impeller of compositing graphite and ceramic belongs to the field of the purification treatment of aluminum melt. The invention comprises a graphite nozzle and a graphite-ceramic composite nozzle. The graphite nozzle is connected with the graphite-ceramic composite nozzle. The graphite-ceramic composite nozzle comprises two parts, and the internal part is a graphite tube which is covered with a ceramic bushing. The internal part of the graphite-ceramic composite nozzle is a through hole which is a gas channel. The graphite nozzle is equipped with a jet orifice for gas ejection. The ceramic material is silicon nitride bonded silicon carbide material, and the component and the weight percent are: 45 to 70 percent of silicon nitride and 30 to 55 percent of silicon powder. The ceramic material of the invention has the advantages of the good high temperature oxidation resistance, the good thermal shock resistance, the strong slag corrosion resistance, the high strength and the wear resistant, preventing from the erosion and oxidation of the graphite tube from aluminum liquid and air, thereby achieving the longer service life of the rotor of rotary impeller of compositing graphite and ceramic than that of the original rotor of rotary impeller with full graphite material.

The invention relates to a wall-breaking method of algae, and in particular relates to a superfine crushing wall-breaking method of a haematococcus pluvialis cell. According to the method, superfine crushing equipment is adopted and is matched with liquid nitrogen equipment, so that the haematococcus pluvialis is frozen instantaneously to become brittle. Therefore, the wall-breaking rate is improved, and the protection environment of a low temperature and oxygen isolation are realized. After the wall-breaking treatment is carried out on the haematococcus pluvialis cell by using the method, the active substance of the haematococcus pluvialis cell has a high leaching rate and is not oxidated, so that the extraction ratio of the active substance is improved. The method is simple in process and convenient to operate, and can be used for performing the one-step treatment on a small quantity of samples in a short time and can also be matched with continuous equipment, sample collection equipment and the like to realize the automatic and continuous production, i.e., the mechanization degree is higher, so that the method is suitable for industrialized production. In addition, the samples are not polluted during the equipment running process, so that the safety is high.

The invention provides a steel ladle wire feeding auxiliary device and a steel ladle wire feeding method. The steel ladle wire feeding auxiliary device comprises a steel ladle and a wire-feeder arranged on a working platform. A metal wire lead-out tube of the wire-feeder is connected with the steel ladle wire feeding auxiliary device which is arranged in an ascending and descending manner, metal wires are delivered into the steel ladle wire feeding auxiliary device by the metal wire lead-out tube, and then the metal wires are directly injected into the liquid steel in the steel ladle by the steel ladle wire feeding auxiliary device. The working platform is provided with a ventilating and dedusting device with a vacuumizing unit, and the ventilating and dedusting device is connected with the inner portion of the steel ladle wire feeding auxiliary device and is in pipeline communication with the steel ladle wire feeding auxiliary device. By means of the steel ladle wire feeding auxiliary device and the steel ladle wire feeding method, the metal wires are directly fed into the liquid steel, the phenomena that the wires are melt before entering into the liquid steel, and the wires cannot enter the liquid steel due to the fact that steel slag is too thick are avoided, and the wire yield rate is increased; gases and smoke dust are discharged into the ventilating and dedusting device, and the environmental pollution is reduced; and the metallurgical reaction conditions of the liquid steel in the steel ladle are changed by the vacuumizing unit, part of the metallurgical reaction velocity is increased, the oxidation loss of useful elements is prevented, and the alloy yield rate is increased.

The invention discloses a preparation method of a mango lactic acid beverage improving oxidation resistance. The preparation method comprises the following steps of (1) preparing mango primary pulp: thoroughly washing mangos, macerating the washed mangos in a sterilized solution, taking the macerated mangos out, performing peeling, performing kernel removing and performing pulping, removing crudefibers of the mangos with a filtering cloth, and performing synergistic treatment of superhigh pressure and ultrasonic waves, so as to obtain the mango primary pulp; (2) adjusting ingredients: addingsyrup, ox bone powder, phenylalanine and tyrosine; and (3) performing fermentation: adding a fermenting agent, performing fermentation, and performing filtration, so as to obtain finished products, wherein the fermenting agent is lactobacillus plantarum. Through the adoption of the preparation method disclosed by the invention, the obtained mango lactic acid beverage is rich in fragrance and freshin mouth feel, and the clearance rate of DPPH free radicals, the clearance rate of hydroxyl radicals and the clearance rate of superoxide anion free radicals are high; and compared with mango flesh,the mango lactic acid beverage prepared by the preparation method disclosed by the invention is high in the content of flavonoid compounds, the content of polyphenol compounds and the content of mangiferin.

The invention relates to vacuum glass with a photoelectric conversion layer. The vacuum glass comprises an upper glass plate, a supporting column, a vacuum sealing flux, a lower glass plate and a getter and is characterized in that the photoelectric conversion layer is arranged on one side of a vacuum cavity, and electrodes are arranged on two side surfaces of the photoelectric conversion layer and are fixed at connection parts of a conductor and the vacuum sealing flux. The photoelectric conversion layer in the vacuum cavity is used for converting solar lights into electric power so as to finish comprehensive utilization of photoelectric conversion. The vacuum glass with the photoelectric conversion layer, disclosed by the invention, has the advantages of reasonable structure, high optical energy utilization rate, effectively reduced oxidation of the photoelectric conversion layer, prolonged service life and improved photoelectric conversion efficiency, reasonable manufacturing process, low relative cost, energy saving, environment friendliness and easy popularization and application in large batch.

The invention discloses a pollen nutrient solution as well as an extraction method thereof, pollen ice cream and a preparation method thereof, and relates to the technical field of food, natural healthcare products and pharmacy. The extraction method of the pollen nutrient solution comprises the following steps at normal temperature and normal pressure: sterilizing raw materials in sequence by ozone, filtering, washing, separating, physically breaking the walls, eliminating emulsification and separating to obtain the pollen nutrient solution. The preparation method of the pollen ice cream comprises the following steps: at a freezing step of the ice cream, placing the pollen nutrient solution into a mature raw material, sufficiently stirring under the nitrogen condition until the mature raw material is solidified to be in a semi-solid state, and finally sequentially filling, hardening, packaging and storing the semi-solid mature raw material to obtain the pollen ice cream. By adopting the pollen nutrient solution, the taste of the pollen is improved, and the food therapy value of active ingredients can be guaranteed.

The invention relates to the technical field of wine brewing, and in particular relates to fructus rosae roxburghii, blueberry and black tea wine and a preparation method of the fructus rosae roxburghii, blueberry and black tea wine. According to the fructus rosae roxburghii, blueberry and black tea wine and the preparation method, blueberries, fructus rosae roxburghii, black tea, prunus salicina fruits (with pulp and stones separated after ripening), pears, rice wine and active saccharomyces bayanus are reasonably mixed, so that the nutritional ingredients in the raw materials are sufficiently utilized, further, the quality of the fructus rosae roxburghii, blueberry and black tea wine is improved, and the nutritive value of the fructus rosae roxburghii, blueberry and black tea wine is enriched; meanwhile, in the preparation technology, due to the limitation of the processing steps including juicing, dreg primary steaming, braising, re-steaming and mixed fermentation, the active ingredients of blueberries, fructus rosae roxburghii, black tea, prunus salicina fruits and pears are sufficiently mixed, so that the mouthfeel and flavor of the wine are enriched, in addition, under the promoting effect of the added rice wine, the efficacies of the active ingredients in the raw materials are obviously exerted, and moreover, the fermentation treatment is carried out in the sealed environment, so that the oxidation loss of the nutritional ingredients is avoided, and the oxidation browning is avoided.

The invention discloses a method for measuring the iron content in direct reduction iron of a steelmaking auxiliary material. The method comprises the following steps: 1, decomposing a test sample, namely, weighing a reduced iron test sample, adding an FeCl3 solution, placing on a magnetic stirrer, and stirring for 20-30min; 2, filtering the test sample, namely, filtering and sealing the stirred test sample; and 3, titrating the test sample, namely, adding sulfuric-phosphoric mixed acid in the test sample, sealing a suction filtration bottle opening by using a rubber plug, placing on the magnetic stirrer, stirring for 20-30min, opening the rubber plug of the suction filtration bottle opening, adding 50-60 drops of a 0.2% sodium diphenylaminesulfonate indicator in each 1 g of reduced iron test sample, titrating by using a sodium diphenylaminesulfonate standard solution until the solution is of a stable bluish violet, recording a volume of the consumed potassium dichromate standard solution, and calculating the content of metal iron according to a formula. The method prevents the metal iron from being oxidized, and is good in repeatability and accurate in measurement; the measurement accuracy of test sample testing is within 1.0 percent.

The present invention discloses an antifreeze polypeptide-sorbitol composite antifreeze agent and application, belonging to the food processing field. The antifreeze agent comprises the following components in parts by weight: 0.5-6 parts of antifreeze polypeptide, 0.2-4 parts of sorbitol,1-3.5 parts of glycerin, 2.5-4.5 parts of polydextrose and 0.1-0.5 parts of sodium citrate. According to the present invention, an antifreeze polypeptide acts as a main protective agent, and is combined with small molecules to obtain a composite low temperature protection formula. The product stability of surimi products can be favorably maintained during low-temperature storage of the surimi products, and the gel strength and water retention capability of the surimi products are improved, providing protection during low-temperature refrigeration and transportation of the surimi products. The antifreeze polypeptide manufacturing process is mature and simple, low in production cost, and suitable for industrial production. In addition, the antifreeze polypeptide is high in low-temperature protective activity, is not sweet, and can maintain the flavor of surimi products.

The invention discloses a front-end working device for detecting wave energy intensity for coastal use, which includes a casing, an operation box is arranged inside the casing, and first grooves are arranged at one side and four corners of the casing. One side of the groove close to the operation box is rotatably connected with a roller through the first bracket, and the side of the roller away from the first bracket is rollingly connected with a crossbar, and one end of the crossbar is fixedly connected with a baffle, and the crossbar A wave-bearing plate is fixedly connected to one end away from the baffle through a vertical plate, and the upper and lower ends of the side close to the vertical plate of the pressure sensor are fixedly connected to the vertical plate through springs. The present invention relates to the technical field of wave energy equipment. The coastal wave energy intensity detection front-end working device achieves the purpose of avoiding the oxidation loss of the device directly in contact with seawater, and avoids the impact of the detection parts directly facing the waves, prolongs the service life of the device, and avoids the internal damage caused by moisture in the device. loss.