37 results about "Freeze dry" patented technology

A method for producing a surface-treated silver-containing powder comprises vacuum freeze drying a dispersion liquid, which is obtained by dispersing silver or silver compound particles (a) in a solvent together with a surfactant (b) of an alkylamine type or an alkylamine salt type, or a phosphate type having a phosphorus content of 0.5 to 10% by mass so that the surfactant (b) is adsorbed in the surface of the silver or silver compound particles (a), thereby producing a silver-containing powder (c) whose surface is treated with the surfactant (b). Moreover, a silver paste is produced by dispersing the surface-treated silver-containing powder (c) in a solvent, or in a solvent with a resin.

The invention belongs to the technical field of intelligent high-molecular materials, and relates to a preparation method and an application of a high-strength oriented polyvinyl alcohol hydrogel. Thepreparation method of the high-strength oriented polyvinyl alcohol hydrogel comprises the following steps: adding deionized water to dissolve polyvinyl alcohol powder, carrying out freeze-thawing circulation, pre-stretching orientation and freeze drying to obtain a polyvinyl alcohol aerogel, and immersing the obtained polyvinyl alcohol aerogel in an aqueous solution of a salt having a Hofmann effect or an aqueous solution of a salt capable of forming a coordinate bond or an aqueous solution of a polycarboxy compound capable of forming a hydrogen bond with polyvinyl alcohol to prepare the high-strength oriented polyvinyl alcohol hydrogel. The high-strength oriented polyvinyl alcohol hydrogel has a tensile strength reaching up to 41.0 MPa, an elongation at break reaching up to 228.0% and atoughness reaching up to 49.94 MJ/m<3>, also has antibacterial and anticorrosive effects and a free radical scavenging effect, and is of great significance to broaden the application of the polyvinylalcohol hydrogel in artificial muscles and cartilages, tissue engineering and other biomedical materials.

The invention provides a vacuum spray freeze-drying device and method. The vacuum spray freeze-drying device is characterized in that the device comprises a closed container used for containing materials in the vacuum spray freeze-drying process, atomizing nozzles, a vacuum system and a temperature regulating jacket; the atomizing nozzles are used for atomizing and dispersing liquid to be freeze-dried into liquid drops and spraying the liquid drops into the container; the vacuum system is used for forming a vacuum environment in the container in the vacuum spray-freezing pelletizing stage to enable part of components in the liquid drops to be vaporized so as to absorb heat, and then the liquid drops are cooled and frozen to form particles, and the vacuum system is also used for carrying out continuous vacuumizing in the drying stage so as to maintain the vacuum environment; the temperature regulating jacket is used for carrying out refrigeration in the vacuum spray-freezing pelletizing stage to prevent part of components in the particles from being molten, and the temperature regulating jacket is also used for providing sublimation heat for part of the components in the particles in the drying stage. In the fast freezing process of the materials, and no refrigerants are adopted to contact with the materials, so that the risk of material pollution is completely eliminated, and sterility of the freeze-drying process is guaranteed.

The invention discloses a bee product with a function of improving sleeping, which is mainly prepared by mixing the following raw materials in mass fraction: 30-55 percent of spina date seed powder, 25-40 percent of tuchahoe powder, 10-15 percent of lyophilized royal jelly, and 10-15 percent of propolis powder. A preparation method comprises the following steps of: carrying out freeze-drying treatment on the raw material of royal jelly by adopting a low-temperature freeze-drying process to obtain the lyophilized royal jelly; soaking by adopting ethanol in a backflowing manner, concentrating, adding auxiliary materials, spray drying and sterilizing to prepare the spina date seed powder and the tuchahoe powder respectively; mixing the propolis purified by using the ethanol and a powder flowable agent to prepare the propolis powder; and finally, mixing the lyophilized royal jelly, the spina date seed powder, the tuchahoe powder and the propolis powder in proportion, and filling to obtainthe bee product. The product is suitable for long-term use, has no toxic or side effects basically, and has favorable efficacy for improving sleeping.

The invention discloses a method for preparing angiotensin-I-converting enzyme (ACE) inhibitory peptide by using enzymolysis goat milk casein. The method comprises the following steps of: centrifugally degreasing recovered goat milk to obtain skimmed milk; preparing casein by using an isoelectric precipitation method; freezing and drying casein precipitate; dissolving the obtained casein freeze-dried powder to prepare a casein solution; performing hydrolysis on the casein solution by adding different kinds of enzymes; and optimizing the hydrolysis condition and treating a hydrolysis process in an ultrasonic wave mode, so that catalytic activity is improved to ensure that the hydrolysis reaction is complete; and because of the obtained micromolecule ACE inhibitory peptide, obvious pressure reduction function on hypertensive can be achieved, the influence on normal blood pressure is avoided, and the method has the characteristics of no toxic and side effects, high security and easiness for absorption.

A bifidobacteria colostrum-soluble soft capsule and a preparation method thereof. The invention relates to a bifidobacterium colon-soluble soft capsule and a preparation method thereof. The soft capsule includes two parts, a content and a rubber skin, and the shell of the soft capsule is processed to make it colon-soluble. The content of the soft capsule is a stable suspension prepared by mixing and stirring bifidobacterium freeze-dried powder, vegetable oil, suspending agent and wetting agent. In addition, the capsule shell has colonic solubility by impregnating the soft capsule with formaldehyde. The invention encapsulates the bifidobacterium freeze-dried powder soft capsule with vegetable oil as the carrier, has the effect of dissolving the colon, has good product stability, is convenient for transportation and storage, prolongs the shelf life, and jointly acts the bifidobacteria and vegetable oil on the colon , improve the disorder of intestinal flora, achieve the effect of laxative, and solve the pain caused by constipation. The invention is applied to the field of preparation of probiotics.

A method of preparation of a treated Spirulina compound includes the steps of rehydrating desiccated Spirulina, stressing the culture and freeze drying to a powder. The resultant compound has activity as an anti-viral compound and an anti-bacterial compound. It is capable of effecting repair of skin defects in mammals and acting as a preventative agent to skin defects.

The invention discloses a preparation method of a graphene aerogel epoxy resin composite fracturing proppant. The preparation method comprises the following steps: 1, dropping a certain concentrationof graphene oxide suspension in a frozen mixture of petroleum ether and methyl silicone oil to form graphene oxide droplets; 2, moving the graphene oxide droplets in a freeze dryer for freeze drying to obtain graphene oxide aerogel pellets; 3, performing high-temperature thermal reduction on the graphene oxide aerogel pellets into graphene aerogel pellets; 4, introducing the graphene aerogel pellets into an epoxy resin and curing agent mixture for vacuum compounding and then heating and curing to form the grapheme epoxy resin composite fracturing proppant; the pellet type fracturing proppant made by graphene aerogel and epoxy resin compounding has the advantages of low density and high compression strength and can significantly improve the fracturing and yield-increasing efficiencies.

The invention provides a sodium alginate adsorption support as well as a preparation method and application thereof, and relates to the field of adsorption materials. The preparation method comprisesthe following steps: preparing a sodium alginate solution with a mass fraction of 2-13% by using sodium alginate as a solute and water as a solvent; then, pouring the sodium alginate solution into a culture plate, standing to remove bubbles, freezing at -35--25 DEG C for 8-12 hours first, and then, carrying out secondary freezing at a60--50 DEG C for 3-5 hours, and carrying out freeze drying in avacuum freeze dryer for 36-60 hours to obtainsodium alginate freeze-dried blocks; soaking the obtained sodium alginate freeze-dried blocks into an ethanol solution, then taking out sodium alginate, removing ethanol attached to the surface, then putting sodium alginate into a calcium chloride solution for a cross-linking reaction, taking out a sodium alginate product after the reaction, and removing calcium chloride on the surface so as to obtain the sodium alginate adsorption support. The sodium alginate adsorption support is low in preparation cost and high in heavy metal adsorption efficiency, and various problems of environmental pollution and production and operation cost are effectively solved.

The invention belongs to the technical field of veterinary diagnosis, and particularly relates to a freeze-dried hemagglutination inhibition test antigen for detecting mycoplasma synoviae (MS), an antigen combination and a preparation method. The freeze-dried hemagglutination inhibition test antigen for MS is prepared by the steps of selecting a mycoplasma synoviae CCTCC No.M 20191100 strain, andcarrying out seed liquid culture, enlarged culture, inactivation, concentration and freeze drying. The invention further discloses the combination of the freeze-dried hemagglutination inhibition testantigen with a Mycoplasma gallisepticum (MG) hemagglutination inhibition test antigen. The hemagglutination inhibition test antigen and the combination thereof provided by the invention are stable inproperty and easy to store. The HI detection method established by utilizing the antigen is simple and rapid to operate and low in cost, and has good sensitivity and specificity.

The invention relates to an active pure snake powder capsule and a preparation technique thereof. The invention adopts the technical scheme that the active pure snake powder capsule is prepared from Agkistrodon halys freeze-drying powder and black-tail snake freeze-drying powder according to the weight ratio of 2-3:1. The preparation technique comprises the following steps: delivering the washed Agkistrodon halys and the washed black-tail snake into a freezing dryer and freezing for 7-9 hours at negative 45 DEG C to negative 35 DEG C; starting a vacuum pump and heating to sublimate for 9-11 hours at 25-35 DEG C under a state of the vacuum degree of 1.3-13Pa; heating to sublimate for 11-13 hours at 55-65 DEG C; heating to sublimate for 9-11 hours at 75-85 DEG C; after vacuum drying, pulverizing the Agkistrodon halys and the black-tail snake coarsely by a roller respectively, then pulverizing finely and obtaining Agkistrodon halys freeze-drying powder and black-tail snake freeze-drying powder; and mixing the Agkistrodon halys freeze-drying powder and the black-tail snake freeze-drying powder evenly according to the weight ratio of 2-3:1, sieving with a sieve of 80 meshes and granulating a sieved substance by a capsule granulating machine after sterilizing by microwave. The invention can retain all the effective components of a snake, has curative effect to the three-high and is convenient to eat.

The invention provides an extraction method for phellinus vaninii polysaccharide. The method comprises the following steps: crushing a phellinus vaninii fruiting body to 1-5 mesh, performing soaking in physiological saline for 8-24 h, performing centrifugation, and collecting residues; boiling the residues of the phellinus vaninii fruiting body in boiling water at 110-130 DEG C for 20-40 min, performing centrifugation, and collecting residues; adding water into the residues, performing freezing for 24-36 h, and performing unfreezing; adding water into the unfrozen mixture to obtain a mixed liquid, adding a complex enzyme into the mixed liquid, performing enzymatic hydrolysis at 50-60 DEG C for 2-4 h, and performing centrifugal separation to obtain a supernatant liquid; and finally, performing adsorption on the supernatant liquid by using resin, performing dialysis, performing concentration, and performing freeze drying to obtain the phellinus vaninii polysaccharide. According to the extraction method for the phellinus vaninii polysaccharide provided by the invention, the extracted phellinus vaninii polysaccharide has obvious activity of inhibiting tumor cell proliferation, has goodbiocompatibility compared with a polysaccharide extracted and purified by a chemical method, and does not bring an inflammatory reaction; and the phellinus vaninii polysaccharide provided by the invention can be used in anti-tumor drugs or health-care products.

The invention relates to the field of medical checkup quality control, and concretely relates to a liquid composite protective agent for long-term culture preservation, and a preparation method and an application method thereof. The liquid composite protective agent for long-term culture preservation is prepared from the following components according to 100mL of solution agent: 15 to 20mL of ethylene glycol, 10 to 15mL of glycerinum, 0.5 to 1g of nutrient bouillon, 0.3 to 0.8g of trehalose, 0.1 to 0.5g of brain infusion powder, and the balance distilled water. The liquid composite protective agent for long-term culture preservation provided by the invention has good protection on various bacteria cultures, can ensure the activity of the cultures at the temperature being minus 20 DEG C and below after being mixed with the cultures, cannot affect the biochemical characters of microorganisms, has no need to be freeze-dried, redissolved and preserved in dark, and is convenient to use and operate in clinic bacterial detection. The cultures protected by the liquid composite protective agent provided by the invention can stably survive for more than 1 year at the temperature being minus 20 DEG C, and stably survive for more than 10 years at the temperature being minus 70 DEG C, so that great convenience is provided for the long-term preservation of special cultures.

A process for preparing the freeze-dried powder injection of sowthistleleaf ixeris includes such steps as breaking the irexis sonchifolia, immersing in alcohol, filtering, ultrasonic extracting, collecting the immersing liquid and liquid extract, filtering, recovering alcohol, concentrating, purifying with polyamide column, removing eluting distilled water, merging, baking, preparing mannitol solution, dissolving said purified powder in the water for injection, ultrafiltering, mixing it with said mannitol solution, regulating pH=5.5-7.2, adding the water for injection, filtering, pouring in containers and freeze-drying.

The invention discloses an asparagus freeze-drying process and device. The asparagus freeze-drying process comprises the following steps: A, carrying out sorting and cleaning, i.e., selecting fresh asparagus of which the tail diameter is below 0.8 to 1cm, cleaning the fresh asparagus with water, and removing silt; B, cutting into sections, i.e., cutting the cleaned asparagus into sections with thecutting length of 10 to 15cm; C, removing green, i.e., blanching the cleaned asparagus in salt water containing 1% to 5% of salt, and after completing blanching, immediately cooling the blanched asparagus, wherein a blanching temperature is 95 to 100 DEG C, and time is 2 to 4 minutes; and D, placing on a tray, i.e., placing the asparagus subjected to green removal on the tray; Compared to the prior art, the quality guarantee period can be prolonged purely naturally under the condition of not adding any preservative, the requirement of people for the asparagus throughout the year is met, drying is uniform, and the product quality is good.

The invention relates to a method for preparing a soil remediation fertilizer based on lumbrukinase-attapulgite. The method comprises the following steps: weighing attapulgite raw ore, drying and grinding into powder of 120-200 meshes, and adding into distilled water for soaking; weighing a sodium hexametaphosphate dispersing agent to be added into an aqueous solution of the attapulgite powder, wherein the mass of the sodium hexametaphosphate is 1-4% of the mass of the attapulgite; stirring and filtering to obtain a wet filter cake; adding the wet filter cake into a lumbrukinase extracting solution, stirring the mixed solution, and performing vacuum freeze drying; and finally, grinding and granulating, thereby obtaining the lumbrukinase-attapulgite soil remediation fertilizer. According tothe combination of the attapulgite and lumbrukinase, the utilization efficiency of the lumbrukinase soil remediation fertilizer can be greatly improved, inorganic or organic pollution of the soil isremediated, damage of the chemical fertilizer to the soil is alleviated, the soil environment for crop growth is improved, fertilizer and water retaining can be realized, beneficial trace elements areprovided for growth and development of crops, and the fertilizer is a green, safe and environmental-friendly soil remediation fertilizer.

The invention discloses a yellow pear skin black rice chiffon cake and a preparation method thereof. The cake consists of the following components in parts by weight: 1-5 parts of yellow pear skin powder, 30-50 parts of black rice flour, 0-10 parts of low-gluten flour, 10-15 parts of corn starch, 40-50 parts of white granulated sugar, 25-35 parts of milk, 140-160 parts of eggs, 30-40 parts of cornoil and 0.5-2 parts of an acidity regulator, wherein the yellow pear skin powder is prepared by pulping and freeze-drying. The yellow pear skin powder is prepared by carrying out freeze-drying treatment after carrying out pulping, and during preparation, low-temperature freezing is carried out first, then vacuum freeze-drying is carried out, and crushing and sieving are carried out after freeze-drying. According to the invention, the black rice flour and the selenium-rich yellow autumn pear skin powder are combined with a traditional chiffon cake manufacturing process to prepare the cake which is attractive in color, rich in fragrance of black rice flour, good in flavor and rich in nutrient substances.

The invention discloses a preparation method of an anti-mildew agent for feeds, and belongs to the technical field of feed additives. The preparation method of the anti-mildew agent for feeds comprises the following steps of ball-milling vermiculite, water and betaine so as to obtain a ball-milled material; performing ultrasonic oscillation on the ball-milled material, a hydrochloric acid solutionand cysteine sulfonate, and carrying out freeze-drying so as to obtain a dried material; carrying out fermentation by using distilled water, the dried material, glucose, a yeast extract, edible maggot, fungus powder, disodium hydrogen phosphate and sodium dihydrogen phosphate, and carrying out drying, crushing and sieving so as to obtain sieved granules; putting acetone, ethanol, the sieved granules, diacylglycerol and an additive into a reactor, discharging gas by using trimethylamine, adding an catalyst, carrying out heated stirring, carrying out cooling to room temperature, and carrying out standing; after standing, discharging materials, carrying out filtration, conducting washing by using petroleum ether, diethyl ether, acetone and ethanol, and carrying out drying so as to obtain a dried material; grinding the dried material, a nutrient supplement agent and sodium humate, and collecting the ground material so as obtain the anti-mildew agent for feeds. The anti-mildew agent for feeds solves the problems of the existing anti-mildew agents for feeds, namely liable causing of anorexia and refusal to eat, and slow growth caused by reduced feed intake caused by abdominal fullness of livestock after eating the existing anti-mildew agents for feeds.

The invention relates to the technical field of foods, and discloses a ragimillet seed biscuit. The biscuit comprises the following raw materials in parts by weight: 60-80 parts of ragimillet seed flour, 20-30 parts of oat flour, 20-30 parts of buckwheat flour, 10-20 parts of quinoa powder, 10-15 parts of corn flour, 5-10 parts of potato flour, 7-12 parts of concentrated soybean protein powder, 5-15 parts of white granulated sugar, 5-10 parts of fructo-oligosaccharide, 5-10 parts of maltodextrin, 2-5 parts of resistant dextrin, 10-15 parts of kiwi fruits, 8-15 parts of fresh jujubes, 5-10 parts of carrots, 10-20 parts of olive oil, 5-10 parts of egg yolk oil and 5-10 parts of composite freeze-dried probiotic powder. The invention also discloses a production method of the ragimillet seed biscuit. The ragimillet seed biscuit produced by the method is added with a plurality of raw materials, so that the ragimillet seed biscuit is finer in taste and excellent in taste, and is suitable forstorage and popularization.

The invention relates to the field of deep processing of fructus rosae laevigatae and provides fructus rosae laevigatae standard decoction lyophilized powder and a production process thereof and solves the problem that a fructus rosae laevigatae lyophilized powder product prepared by a conventional lyophilizing process is great in viscosity and collapses severely. The invention provides the fructus rosae laevigatae standard decoction lyophilized powder. The production process comprises the following steps: taking 1-5 mL of a fructus rosae laevigatae standard decoction; adding 1-30% of a freeze-drying protective additive; and freezing and drying the mixture to obtain the lyophilized powder. By adding the freeze-drying protective additive, the prepared lyophilized powder is smooth in surface, uniform in color and luster and small in hygroscopicity, and the product quality is improved effectively.

The invention relates to the technical field of domestication of soft-shelled turtles, in particular to incubation land for soft-shelled turtle eggs. The incubation land is characterized by being prepared from, by weight, 200 parts of fine sand, 20 parts of cotton, 7 parts of zinc gluconate, 1 part of edible acetic acid, 4 parts of volcanic, 1 part of Konjac powder, 6 parts of calcium citrate, 10 parts of tulip petals, 0.5 part of disodium succinate, 3 parts of freeze-dried cactus powder, 1 part of I+G, 6 parts of egg white, 4 parts of carrot blocks, 4 parts of mushrooms, 6 parts of carambola fruits and 9 parts of additive. The method is reasonable, operation is convenient, and matching is reasonable.

The invention discloses fresh rhizoma gastrodiae freeze-dried cakes and a making method thereof. The processing technology comprises the following steps of selecting fresh rhizoma gastrodiae, performing cleaning, performing steaming, performing pulping, performing shaping, performing freezing and performing vacuum freeze drying so as to obtain the fresh rhizoma gastrodiae freeze-dried cakes. The fresh rhizoma gastrodiae freeze-dried cakes have the following advantages that the fresh rhizoma gastrodiae freeze-dried cakes are processed by using the fresh rhizoma gastrodiae as a raw material in the technology, the situation that nutrition and medicine effect components in the rhizoma gastrodiae do not run off to the maximum extent is guaranteed, and the problem of pollution of medicinal materials, which is possibly caused by multiple-procedure processing can be solved; according to the freeze-dried rhizoma gastrodiae cakes produced and processed through the technology, unpleasant smell ofthe fresh rhizoma gastrodiae is removed, and the freeze-dried rhizoma gastrodiae cakes have better mouth feel; the fresh rhizoma gastrodiae is directly used for processing the fresh rhizoma gastrodiae freeze-dried cakes, so that the production cycle is shortened, the production cost is reduced, the working procedure of baking treatment of the fresh rhizoma gastrodiae is omitted, the fresh rhizomagastrodiae can be processed locally, and the storing and transporting cost of processing rhizoma gastrodiae dry products is omitted; the quality guarantee period is long, the fresh rhizoma gastrodiaefreeze-dried cakes are stored away from light at room temperature, and the quality guarantee period can reach 12 months; and the method is suitable for large-scale processing and producing of the fresh rhizoma gastrodiae, the predicament that the rhizoma gastrodiae is difficult to produce and store and difficult to transport is greatly relieved, the technological process is stable, the producingand operating technique is simple and convenient, and pilot scale production and industrial production are easy.