184results about How to "Avoid Oxidative Damage" patented technology

The invention belongs to the technical field of health-care foodstuff, and provides eye-protecting blueberry-raspberry functional food. The eye-protecting functional food comprises, in parts by weight: 15-40 parts of blueberry polyphenol extract product, 15-40 parts of raspberry polyphenol extract product, 10-20 parts of lycium ruthenicum polyphenol extract product, 0.1-2 parts of fructus lycii carotenoid extract product, 0.1-2 parts of zeaxanthin extract product, 0.1-2 parts of tagetes erecta xanthophyll extract product, 10-20 parts of haw flavone extract product, 10-20 parts of ginkgo biloba leaf flavone extract product, 10-20 parts of pueraria flavone extract product and 0.1-1 part of beta-carotene. The eye-protecting blueberry-raspberry functional food can be prepared into tablets, capsules, electuaries, leisure foodstuff or beverages, and has substantial efficacy of protecting eyesight, alleviating eye fatigue and preventing light injury.

The present invention relates to a composition for reducing sport injury and promoting sport injury repair. The composition comprises the following raw materials and auxiliary materials, by weight, 500-2000 parts of hydrolyzed collagen protein, 100-400 parts of soybean protein peptide, 50-400 parts of chondroitin sulphate, 50-400 parts of glucosamine or a salt thereof, 100-1000 parts of a traditional Chinese medicine, 10-400 parts of haematococcus pluvialis, 1-100 parts of vitamin, and 1-100 parts of a mineral. The composition provides good effects for sport injury reduction and sport injury repair promotion.

The invention relates to a method for enzymolyzing wheat bran to prepare asafetida oligosaccharide, wherein it uses wheat bran as raw material; uses enzymatical to remove amidon, remove protein to prepare wheat bran insoluble fiber; then uses bacillus subtilis xylanase to hydrolyze wheat bran insoluble fiber to prepare the asafetida oligosaccharide. And the density of asafetida oligosaccharide will reach 1.497mmol / L. the invention can effectively utilize wheat bran, while prepared asafetida oligosaccharide has significant biological activity, to accelerate the generation of bifidobacteria, and restrain the erythrocyte oxidisability damage indused by free group, with better social and economic benefits.

The invention discloses a computer case with dustproof and moisture-proof functions. The computer case includes a base and a case body. The upper surface of the base is provided with the case body, and a fixed heat dissipation plate is arranged on the back side of the case body. The case body is internally provided with a chute, the chute is located on the right side of the fixed heat dissipationplate, a slidable heat dissipation plate is slidably installed in the chute, and a spring is connected between the lower side of the slidable heat dissipation plate and a partition. The computer casecan randomly switch a moving state or a static state and facilitate the movement; when the case is not used, by causing the case body to be in a sealed state, outside dust and damp air are prevented from entering the case body, so that the internal cleanliness of the case body is ensured, the case body internally does not need to be often cleaned, and the time is saved. At the same time, the dampair can also be prevented from causing oxidative damage to internal parts of a mainframe, and the service life of the product is greatly improved.

The invention relates to a production method of instant dried white fungus. The production method comprises the following steps: (1) material selection, namely removing impurities from fresh white fungus, and cleaning; (2) slicing; (3) pre-freezing, namely carrying out pre-freezing for 12-14 hours at temperature from -10 DEG C to -25 DEG C; (4) drying, namely carrying out microwave vacuum freeze drying, wherein the microwave vacuum freeze drying comprises a low-temperature sublimation stage and a normal-temperature vacuum microwave drying stage; (5) vacuum encapsulation. According to the process, a curing process before drying is omitted, so that the loss of the tremella polysaccharide is avoided, and processing cost is saved by 15%. According to the instant dried white fungus processed by utilizing the production method, the product is pure in appearance and color and plump in form; after being rehydrated, the product is nature in form and pure in taste and flavor, the product quality is greatly improved, and the product is obviously superior to similar products processed by utilizing traditional methods.

The invention discloses a new type of bridge equipment, which includes an opening and closing groove arranged on the upper surface of a box body and a retracting groove arranged on the right side of the box body to align with and communicate with the opening and closing groove. An opening and closing plate can be slid left and right in the middle of the opening and closing groove. There are two electric connection concave holes arranged on the left and right on the bottom end surface of the opening and closing groove and used to connect the electric connectors of the electric equipment. The box body is provided with The first sliding groove, the right side of the box body is provided with a third sliding groove communicating with the first sliding groove, the top of the third sliding groove communicates with the left side of the receiving groove and the There is a second sliding groove in communication between the third sliding groove and the first sliding groove; the power connection device of the present invention has a simple overall structure, convenient use and operation, safe and stable power connection, and greatly reduces the troubles in existing life. Electric shock accidents effectively guarantee people's life safety and are suitable for popularization and use.

The invention discloses a compound antioxidant for animal feeds. The compound antioxidant is prepared from the following components in parts by weight: 10-40 parts of tea polyphenol, 5-15 parts of lactein, 5-20 parts of ethyoxyl quinolone, 1-5 parts of butylated hydroxyanisole, 1-5 parts of propylgallate, 5-20 parts of a synergist, 10-20 parts of an emulgator and 15-40 parts of a carrier. In addition, the invention further discloses a preparation method of the compound antioxidant for the animal feeds. The preparation method comprises the following steps of molecular fusion, homogenization and emulsification, spray drying and the like. The compound antioxidant for the animal feeds, disclosed by the invention, ensures the mixing uniformity of the components, and the oxidation resistance is outstanding.

The present invention discloses a blueberry tablet candy with beautifying and antibacterial efficacy and a preparation method thereof, and belongs to the technical field of deep processing of blueberry. The method is as below: processing a main raw material blueberry into a blueberry syrup by using a non-thermal for processing method; uniformly mixing the blueberry syrup with milk, sugar, a herb extract, honey and a stabilizer; adding a leavening agent; fermenting by a segmented variable temperature fermentation method to prepare a blueberry yogurt, so as to maximize proliferation of probiotics and gain good thermal stress ability of resistance to coldness and hotness; then adding a protecting agent with good anti-freezing effect and freeze-drying into a powder, so as to obtain a functional blueberry yogurt freeze-dried powder with high content of viable probiotics and strong resistance to coldness and hotness; finally compounding the blueberry yogurt freeze-dried powder with an alfalfa extract, germinated brown rice, a plant extract, dextrin, probiotic factor and magnesium stearate scientifically; and tabletting by a multi-impact rotary tabletting machine to obtain the blueberry tablet candy with high probiotic live bacteria content, good stability, long shelf life and the efficacies of improving the body's immunity, delaying aging, beautifying and resisting bacteria.

The invention discloses hydrogen peroxide low-temperature sterilizing equipment and a use method thereof. The sterilizing equipment comprises a cavity body (1), an evaporator (5), a liquid feeder (6), a vacuum pump (7), a heater (8) and a high-efficiency filter (16), wherein the cavity body (1) is divided into a sterilizing cavity (18) and a transition cavity (19); the sterilizing cavity (18) is connected with the outlet end of the evaporator (5) through a sterilizing valve (9); the inlet end of the evaporator (5) is connected with the liquid feeder (6) through a liquid feeding valve (11); a heating sheet is arranged on the evaporator (5); the air suction end of the vacuum pump (7) is connected with the sterilizing cavity (18) through a vacuum valve (13); and the air outflow end of the vacuum pump (7) is connected with a decomposition filter (17). The sterilizing equipment can sterilize medical appliances at a low temperature, can carry out sufficient sterilization on the pipelines of the medical appliances with slender holes, and can also carry out filtration and decomposition on the used hydrogen peroxide vapor.

The invention relates to a steel surface treating agent, particularly a washing-free normal-temperature phosphating solution after steel workpiece phosphating, which is prepared by mixing the following raw materials in percentage by mass: 12-25% of 85% phosphoric acid, 2-6% of zinc oxide, 1-2% of sodium molybdate dihydrate, 0.5-5.0% of lanthanum nitrate hexahydrate, 0-6% of manganous nitrate tetrahydrate, 0.1-0.8% of tartaric acid, 0.1-0.2% of alkylphenol ether sulfosuccinate sodium salt, 0.1-0.2% of sodium benzoate, 0.1-0.3% of 70% phytic acid, 0-0.5% of 30% oxydol and the balance of water. The preparation method comprises the following steps: adding zinc oxide into 2 times by mass of water, stirring into paste, adding 85% phosphoric acid, and stirring to a uniform transparent state; while stirring, sequentially adding phytic acid and tartaric acid which is dissolved in water, lanthanum nitrate hexahydrate and manganous nitrate tetrahydrate which are respectively dissolved in water, sodium molybdate dihydrate which is dissolved in water, the other raw materials except sodium benzoate, and sodium benzoate dissolved in hot water; regulating the pH value of the solution to 2.0; and adding water to the required amount.

The present invention discloses a blueberry pressed candy with high contents of viable probiotics and a preparation method thereof, and belongs to the technical field of deep processing of blueberries. The preparation method includes: processing blueberries serving as raw materials into blueberry pulp by a non-thermal processing method, evenly mixing the blueberry pulp with milk, saccharose, Chinese herbal medicine extract, honey and stabilizing agents, fermenting the mixture with the addition of fermentation agents and preparing the fermented mixture into blueberry yogurt using a stage temperature shift fermentation method so as to maximize the proliferation of probiotics and to make the probiotics have good resistance to cold and heat stress, freeze-drying the blueberry yogurt into powder with the addition of protective agents with a good anti-freeze effect to obtain functional blueberry yogurt freeze-dried powder with high contents of viable probiotics and strong resistance to cold and heat, and finally scientifically compounding the functional blueberry yogurt freeze-dried powder with alfalfa extract, germinated brown rice, plant extract, dextrin, probiotic factor, magnesium stearate, etc., and pressing with a multi punch rotary tablet pressing machine to prepare the blueberry pressed candy. The blueberry pressed candy is high in contents of viable probiotics, and long in shelf life, can improve human immunity and delay senescence, and has effects in beautifying countenance and maintaining beauty and resisting bacteria.

The invention discloses a process for preparing a honeycomb polyphenol extractive microcapsule by adopting a spray drying method and belongs to the field of microcapsule preparation. The process comprises the steps: sieving honeycomb powder by a 40-mesh sieve, mixing the honeycomb powder passing through the 40-mesh sieve and deionized water with the liquid-material ratio being 20-40 / 1(w / v), fully stirring by adopting a magnetic water-bath stirring bar, extracting 6-8min at the temperature being 30-50 DEG C so as to obtain a honeycomb water extract liquid, concentrating the honeycomb water extract liquid to obtain a product of which the content of solid contents is more than 10%, adding 280-350ml of the honeycomb water extract liquid in maltodextrin in which the content of a solid propolis water extractive is within 65-75% and Arabic gum in which the content of a solid propolis water extractive is within 3-5%, blending to obtain a mixed solution, filtering the mixed solution to obtain filter liquor, and carrying out spray drying on the filter liquor under a condition that the feeding amount of a peristaltic pump is 300-400ml / h so as to obtain the honeycomb polyphenol extractive microcapsule. The honeycomb polyphenol extractive microcapsule prepared by adopting the process is spherical, smooth in appearance, free from cracks, capable of increasing the bioavailability of honeycomb polyphenol, and high in heat stability; the embedding rate can be up to 46.6%.

The invention provides an expansion ring sealed hot compensator for high-temperature gas conveying tubes, which comprises a pair of flanges, a pair of inner connecting tubes, a pair of inner annular plates, labyrinth seals, outer connecting tubes, ear plates, flame retardant coatings, a heat insulation filling material, and expansion ring sealed bellows, wherein the pair of flanges are arranged attwo ends; the pair of inner connecting tubes are respectively connected to the two flanges; the pair of inner annular plates forming expansion rings of the compensator are arranged at opposite ends o f the two inner connecting tubes; the labyrinth seals consisting of inner and outer sleeves are arranged on the inner ring sides of the two inner annular plates; the outer connecting tubes provided with compensating bellows are connected with the two inner connecting tubes through a pair of outer annular plates; the outsides of the two inner connecting tubes are provided with the ear plates provided with pull rods; the insides of the two inner connecting tubes are provided with the flame retardant coatings; the heat insulation filling material is arranged between the two inner annular plates and the inner and outer connecting tubes; and the opposite ends of the two inner connecting tubes are provided with the expansion ring sealed bellows. The expansion ring sealed hot compensator utilizesthe expansion ring sealed bellows to obstruct hot air round the labyrinth seals to prevent the hot air reaching the compensating bellows through the expansion rings and avoid the compensating bellows being damaged due to oxidization under the action of high temperature so as to effectively improve the operation life of the compensator.

The present invention discloses a blueberry pressed candy and a preparation method thereof, and belongs to the technical field of deep processing of blueberries. The preparation method includes: processing blueberries serving as raw materials into blueberry pulp by a non-thermal processing method, evenly mixing the blueberry pulp with milk, saccharose, Chinese herbal medicine extract, honey and stabilizing agents, fermenting the mixture with the addition of fermentation agents and preparing the fermented mixture into blueberry yogurt using a stage temperature shift fermentation method so as to maximize the proliferation of probiotics and to make the probiotics have good resistance to cold and heat stress, freeze-drying the blueberry yogurt into powder with the addition of protective agents with a good anti-freeze effect to obtain functional blueberry yogurt freeze-dried powder with high contents of viable probiotics and strong resistance to cold and heat, and finally scientifically compounding the functional blueberry yogurt freeze-dried powder with alfalfa extract, germinated brown rice, plant extract, dextrin, probiotic factor, magnesium stearate, etc., and pressing with a multi punch rotary tablet pressing machine to prepare the blueberry pressed candy. The blueberry pressed candy is high in contents of viable probiotics, good in stability and long in shelf life, can improve human immunity and delay senescence, and has effects in beautifying countenance and maintaining beauty and resisting bacteria.

The invention discloses a nerve regeneration gel as well as a preparation method and application thereof. The matrix of the nerve regeneration gel is formed by fibrinogen, thrombin, laminin and fibronectin; the nerve regeneration gel contains procyanidine, sonic hedgehog, an epidermal growth factor, neurenergen-3 and a vascular endothelial growth factor. In-vitro test and animal test show that thegel is capable of accelerating neuron regeneration and neurite extension and repairing the injured nerve tissue. The matrix of the gel comprises fibrin, laminin and fibronectin and is capable of reducing formation of cavities and accelerating adhesion and proliferation of endogenous neural stem cells; the procyanidine in the gel is capable of resisting oxidation and inhibiting inflammation; the sonic hedgehog, the epidermal growth factor and the neurenergen-3 are capable of accelerating proliferation of the stem cells and differentiation to neurons of the stem cells; the vascular endothelialgrowth factor is capable of accelerating generation of blood vessels. The gel can be formed in situ on injured parts and can be used for treating nervous system injury.

The invention discloses a feed capable of promoting milk secretion of sheep. The feed is prepared from the following raw materials in parts by weight: 20-30 parts of corn flour, 10-15 parts of cassava residues, 8-10 parts of green bran, 10-15 parts of rapeseed meal, 0.5-0.8 part of sodium chloride, 10-15 parts of fermented distiller's grains, 0.2-0.4 part of yeast selenium, 10-15 parts of tomato powder, 20-30 parts of silage grass powder, 10-15 parts of corn straw, 10-20 parts of silage alfalfa, 15-20 parts of wheat straw, 1-2 parts of a premix for sheep, 0.3-0.4 part of calcium carbonate and 15-25 parts of an additive, wherein the additive is prepared from the following raw materials of black bean powder, fermented citrus residues, a hypericum ascyron extract, peanut meal, medulla tetrapanacis, radix bupleuri, radix angelicae sinensis and licorice roots. The feed disclosed by the invention is comprehensive in nutrients and sufficient in energy, can promote milk secretion, can strengthen the capacity of resisting inflammation, resisting bacteria and resisting viruses, can enhance the resistibility of the sheep, can promote growth, is free from toxic and side effects, and does not generate drug resistance.

A cultivation method for selenium-rich mangos includes: selecting edible organic selenium such as selenium-rich yeast as a selenium raw material; preparing an organic selenium solution by using the selenium raw material; then irrigating and spraying mango plants and fruits with the organic selenium solution in stages during each growth period of the mangos. According to the invention, the selenium raw material is safe and is high in biopotency, and less raw material is used, so that the cost of the whole production process is low, the obtained mangos are rich in nutrition and selenium, and the common mango can become a characteristic functional fruit. Furthermore, through the method, the quality of the mangos is greatly improved, the value of the mangos is increased with the quality, and the benefits are very significant.

The invention provides a preparation method of alkaline manganese chloride capable of being used for animal feed. The preparation method comprises the following steps: (1) adjusting the pH (Potential of Hydrogen) value of a manganese chloride solution to be 6.0 to 7.5; adding manganese; stirring for a period of time and filtering; (2) sealing filtrate filtered in the step (1) and introducing nitrogen gas or inert gas for protecting; slowly adding a strong alkaline solution while stirring; raising the temperature and carrying out constant-temperature reaction after reaching reaction temperature; (3) after reacting, adding an organic solvent or an organic solvent-water mixture into a sealed reaction system and keeping the reaction temperature in the step (2); cooling to room temprature while stirring and crystallizing; (4) filtering, washing and drying to obtain the alkaline manganese chloride. The alkaline manganese chloride prepared by the preparation method has the advantages of small damages to nutrient components, high product bioavailability, low processing cost and the like.

The invention belongs to the technical field of fruit tree production management, and specifically relates to a production method of selenium-enriched pitaya. The production method comprises steps of during the flowering period, spraying a certain amount of a selenium solution on pitaya trees every 7-10 days, and after the pitaya grow out, spraying selenium solution on pitaya trees every 5-6 days. Through the provided production method, the selenium using amount is reduced, so the production cost is low. The produced pitaya is rich in nutrients and selenium, and common pitaya becomes a functional fruit. The quality of pitaya is largely improved, the value of pitaya is greatly increased too, and the economic profit is obvious.

The invention belongs to the technical field of preparation of probiotics, and relates to a preparation method of a composite Pickering emulsion for improving the survival rate of probiotics. The preparation method comprises the following steps: adding span-80 into evening primrose oil, uniformly stirring the span-80 and the evening primrose oil to prepare an oil phase, adding a washed probioticssolution in the oil phase, and carrying out homogenizing to obtain a product A; and mixing a cyclodextrin aqueous solution with the product A to obtain the composite emulsion. According to the preparation method, a double-layer emulsification system is adopted, firstly, a high internal phase processing technology can ensure high content of probiotics in an internal water phase, secondly, the antioxidant activity of the evening primrose oil phase can prevent the probiotics from being oxidized and damaged after the probiotics are stored and orally taken, and in addition, a nano-scale Pickering emulsion wall layer formed by beta-cyclodextrin on the outer layer has a very stable protection effect, can protect the probiotics from being damaged when passing through the stomach and the small intestine, improves the survival rate of the probiotics, and enables the probiotics to smoothly reach the large intestine to play a role. The preparation method can be used for developing novel probioticsfoods, medicines and health products.

The invention relates to the technical field of a horse placenta extract and a pharmaceutical application thereof, specifically to a horse placenta water-soluble protein extract with bioactivity, a preparation method and an application thereof. According to the present invention, during an extraction process, a phosphate buffer solution with a pH value close to a physiological pH value and an osmotic pressure close to a physiological osmotic pressure is adopted as an extraction solvent so as to maintain activity of active substances in a horse placenta to the maximal degree; with the horse placenta extract, activity of normal lymphocytes can be significantly enhanced, proliferation activity of T-lymphocytes and B-lymphocytes induced by ConA and LPS can be significantly inhibited, and killing activity of NK cells on PC-3 cancer cells can be significantly enhanced, such that adjustment effects are provided for immune functions to a certain degree; and with the horse placenta extract, oxidative damage of skin fibroblasts due to H2O2 can be significantly inhibited, cell viability can be improved, MDA content in cells can be reduced, enzyme activities of SOD and GPx can be improved, apoptosis rate can be reduced, and DNA damage can be inhibited, such that a certain protection effect is provided for oxidative damage.

Disclosed are a selenium-rich banana and a production method thereof. The production method includes starting fertilizing selenium solution to banana trees quantitatively once every 7-10 days at the flowering phase of the banana trees until bananas are ripe; starting spraying the selenium solution to the bananas once every 5-6 days during fruiting and stopping spraying at 15 days before the bananas are sold in the market. Via the production method, less selenium is used, so that the integral production process is low in cost, the produced bananas are rich in nutrition and high in selenium content, and common bananas can become functional fruits. Quality of the bananas is greatly improved, the value of the bananas is increased, and economic benefits are remarkable.

The invention provides pueraria vermicelli and preparation technology thereof, and belongs to the technical field of convenient foodstuff-rice-noodle. The pueraria vermicelli is characterized by comprising the following ingredients in percentage by weight: 10 to 50 percent of pueraria vermicelli, 5 to 10 percent of edible starch, and 85 to 40 percent of rice meal. The pueraria vermicelli is prepared by the following steps of: immersing rice, grinding into powder, adding pueraria powder and starch, stirring, self-ripening and extruding, aging, cutting, forming, drying, adding an ingredient bag and packaging and obtaining a finished product. The pueraria powder, in the invention, serves as one of the main raw materials, and the preparation technology is employed, so the prepared pueraria vermicelli has all the nutrient components, such as puerarin, soybean flavonoid nucleoside, TCBA, protein, amino acid, sugar and the like, and mineral substances necessary for human, such as Ferrum, calcium, copper, selenium and the like, which are contained in the pueraria powder; therefore, the invention can greatly enrich the nutrient components of the rice noodle and further improve the flavor and the taste of the rice noodle.

The invention discloses the application of l-n-butylphthalide as formula (I) in preparing a medicine for preventing and treating dementia, in special Alzheimer's disease and vascular dementia.

The invention discloses blueberry pressed candies capable of delaying ageing and a preparation method of the blueberry pressed candies and belongs to the technical field of deep processing of blueberries. The blueberries are used as main raw materials and are processed into blueberry paste by adopting a non-heat processing method; then the blueberry paste is uniformly mixed with milk, sucrose, Chinese herbal medicine extract, honey and a stabilizer, and then a fermentation agent is added to prepare blueberry yoghourt by adopting a stepwise temperature-changing manner, so that probiotics are proliferated to the greatest extent, and the cold and heat stress resisting capability is relatively good; then protecting agent freeze-dried powder with relatively good anti-freezing effect is added to obtain functional blueberry yoghourt freeze-dried powder with high viable bacterium content of the probiotics and strong cold and heat resisting capabilities; and finally, the functional blueberry yoghourt freeze-dried powder is scientifically compounded with alfalfa extract, germinated brown rice, plant extract, dextrin, probiotic factors, magnesium stearate and the like, and the mixture is pressed by a multi-punch rotary type pressing machine to prepare the blueberry pressed candies which have the high viable bacterium content of the probiotics, good stability and long guarantee period, are capable of improving the human immunity, have the effects of maintaining beauty and keeping young and resisting bacteria, and can delay the ageing.

The invention discloses a postweld stabilizing thermal treatment method for a pipeline made of a TP347 material, and the postweld stabilizing thermal treatment method is used for carrying out postweld pretreatment on the pipeline made of the TP347 material before stabilizing thermal treatment. The postweld stabilizing thermal treatment method comprises the following steps: continuously introducing protective gas comprising 92% (in volume fraction) of N2 and 8% of CO2 to the two ends of the pipeline made of the TP347 material opposite to a welding seam separately; heating the welding seam, stopping heating when the temperature is 400 DEG C, keeping the temperature at 400 DEG C for 2-3 hours, reducing the temperature to 100 DEG C, and treating the welding seam by use of ultrasonic impact equipment after circulating for 5-8 times; and finally, carrying out infrared radiation for 4-5 hours on the pipeline made of the TP347 material. According to the postweld stabilizing thermal treatment method disclosed by the invention, stabilizing thermal treatment is carried out after pretreatment; the pipeline made of the TP347 material comprises stabilizing elements, namely niobium, titanium, yttrium and zirconium; and the method disclosed by the invention is adopted, so that welding seam cracks are effectively eliminated, and therefore, welding seam quality is improved.

The invention relates to a cultivation method of selenium-enriched pitaya. The cultivation method specifically comprises the steps of selecting edible organic selenium-selenium-enriched yeasts as selenium raw materials, preparing into an organic selenium solution, and then irrigating and spraying the organic selenium solution to pitaya plants and pitaya fruits by stages in each growth cycle of the pitaya. According to the cultivation method, the adopted selenium raw materials are safe and efficient, the consumption of the raw materials is less, therefore, the cost of the whole production process is low, but the produced pitaya has abundant nutritional values, and the selenium content is high, so that the ordinary pitaya becomes a characteristic functional fruit. In addition, by implementing the cultivation method, the quality of the pitaya is greatly increased, the value of the pitaya is increased thereupon, and the benefits are obvious.

The invention discloses a preparation method of beta-tetrabasic zinc chloride, which comprises the following steps that zinc oxide is added to a zinc chloride solution slowly and then heated, and conducts thermostatic reaction after a reaction temperature is achieved; an organic solvent or an organic solvent-water mixed liquid is added to a reaction system after early reaction is finished; subsequent crystallization reaction is conducted continuously at the reaction temperature; filtration is conducted; a filtered crystal substance is washed and dried; and beta-tetrabasic zinc chloride is obtained. Beta-tetrabasic zinc chloride prepared with the preparation method can serves as a zinc source additive for animal feed, and has the advantages of simple processing step, low cost, green, environmental protection, good product quality and the like.

The invention relates to a complex preparation having radiation-resisting and eyesight-protecting functions, which comprises the following components in percentage by weight: 65 to 98 percent of tea seed oil, 0.15 to 15.0 percent of coenzyme Q10, 0.05 to 10.0 percent of lutein, 0.10 to 10.0 percent of alpha-lipoic acid and 0.01 to 0.10 percent of vitamin A. The tea seed oil is grease obtained by picking and shelling mature seeds of tea trees, drying the shelled tee seeds by hot air at a temperature of between 100 and 110 DEG C until constant weight is achieved, smashing the tee seeds and extracting the tee seeds by using supercritical carbon dioxide. The five components are mixed organically to obtain an efficient radiation-resisting and eyesight-protecting product, so that defects of related products in the current market are solved skillfully. The complex preparation having the radiation-resisting and eyesight-protecting functions is particularly suitable for a wide range of people exposed under radiation environment and is a health-care food with the functions of preventing and repairing damages, protecting the eyesight and relieving asthenopia.