813results about How to "Avoid sex change" patented technology

The invention discloses a medlar and red date enzyme and a preparation method thereof, which belong to the technical field of enzyme preparation. Multi-strain composite fungi powder is adopted as a leavening agent; the medlar and the red date are adopted as main raw materials; dietary fiber, pectin hydrolyzate, seasoner extracting liquor, Chinese herbal medicine extracting liquor, enzyme stabilizer and other multifunctional auxiliary raw materials are scientifically compounded and modified; low-temperature processing technology such as ultrasonic cleaning, cryogenic grinding, microwave-assisted high-voltage pulse electric field processing and ultrasonic ripening are mainly adopted in the whole process, so that the natural colors, the flavor, the taste and the content of the active materials of the medlar and the red date are maintained furthest, the biological stability, the non-biological stability and the biological activity of the medlar and red date enzyme are obviously enhanced, the introduction of chemical addition agent is reduced, and the juicing rate of the medlar and the red date as well as the food safety of the enzyme are improved. Finally, the medlar and red date enzyme with high biological activity, strong stability, strong taste, flavor and appetite, long expiration date and edible safety is prepared.

The invention relates to a freeze-drying protective agent of nucleic acid amplification reaction reagents and a freeze-drying method. The invention provides a composition for freeze-drying protection, which is the following 1) or 2): 1) the composition comprises mycose, mannitol, bovine serum albumin, and water with a ratio of 4.0-25g:1-7g:1.0-7g:49-50ml; 2) the composition comprises mycose, mannitol, bovine serum albumin, Tween, Tris-HCl and water with a ratio of 4.0-25g:1-7g:1.0-7g:0.1-0.25ml:2.5*10<-3>-5.0*10<-3>mol:49-50ml. The freeze-drying protective agent of the invention is low in raw material cost, simple in operation, and suitable for large-scale production, can reduce production cost, and can effectively prolong the storage life of nucleic acid amplification reaction reagents.

Disclosed are an apparatus and a method of measuring porosity and permeability of a carbon dioxide underground storage medium. Both of the porosity and the permeability are measured in the state that the confining pressure is applied once. The variation characteristic in the porosity and the permeability of the core sample according to the salt precipitation occurring when supercritical carbon dioxide is injected is continuously measured. The apparatus includes a holder receiving a core sample, a pressure pump applying a confining pressure to the core sample, a gas chamber storing gas and supplying supply the stored gas to the core sample, first to third pressure gauges measuring an internal pressure of the gas chamber and front and rear portions of the holder, and a gas flow meter measuring a flow rate of gas.

The invention relates to a stabilizing agent for protein solutions, in particular to a long-acting protein solution stabilizing agent. The agent comprises 0.1-5g protein, 0.1-10g sugar, 0.1-10g organic matter, 0.01-0.1g preservative, and 10-200mmol buffer solution salt per 100ml water, and a pH (Potential of Hydrogen) value is 7.2-7.4. The agent has simple constituents, protects the stability of the protein, prevents the protein from degeneration, does not interfere with target reaction, and has general applicability to the most protein solutions. The agent has obvious effects, and can keep the effectiveness of the protein solutions for a long time, and the protein solutions are to be used for the fields of reagents for clinical diagnosis, life science research and the like.

The invention provides walnut powder and a production method thereof; walnut kernel is peeled by high pressure water spraying, bubble water stream impact and ultrasonic wave vibration after being soaked by compound alkaline liquid, and then second-grade cold pressing is carried out to the peeled walnut kernel after the peeled walnut kernel is dried and crushed, the walnut kernel is crushed, filtered, batched and colloid-milled to be refined, and then a complex stabilizer is added in the walnut kernel to be sterilized, concentrated, homogenized and dried to obtain the walnut powder. The method has low damage degree, can effectively prevent protein denaturation and reduce alkaline liquid amount; the second-grade cold pressing technology is adopted, the denaturation degree of the protein of the walnut cake is reduced, and the walnut powder is prepared by high-pressure homogeneity and spraying drying; the visual color and luster, solubility and the content of the protein and other indexes of the product are superior to the similar products in the current market. The invention realizes the comprehensive utilization of the walnut resource, the technology is advanced, simple and practical and is easy to popularize, thereby having good economic and social benefits.

The invention discloses a making method for sweet potato beverage, which is characterized in that: the making method comprises the following steps: 1) rinsing: fresh sweet potatoes are manually or mechanically rinsed, to remove mud, sand and impurity; 2) crushing and grinding juice: the cleaned fresh sweet potatoes are grinded until the grains are less than 1000 micron through a colloid mill or apulping machine, obtaining sweet potato juice. Preservative, sweetener, acidity agent, stabilizing agent, essence, vitamin or one, two or more of the minerals can also be added into the sweet potato juice. The making method has the advantage of simple technology, low production cost, good product quality, high nutritional value, easy absorption and utilization for human body, ability of liquid, solid, grain, capsule, buccal tablet or tablets product forms; and the products made by the method has the advantages that: the dietary fiber, vitamin, protein, polysaccharide, anthocyanin and other compositions of the material are remained, nutritional ingredient of sweet potatoes and active components which can improve humane immunocompetence are remained to the utmost extent, and is an excellentgreen natural health beverage.

A process for extracting edible fibres from kelp includes such steps as washing, drying and pulverizing raw kelp, enzymolyzing, treating with hydrochloric acid, extracting by sodium carbonate, filter, neutralizing the filtrate, adding calcium chloride to obtain gel, treating the dregs with sodium hydroxide and hdyrochloric acid, mixing the said gel with the treated dregs, bleaching with sodium hypochlorite, activating, dewatering, baking and pulverizing.

The invention relates to the deep processing of deep-sea cod, specifically a method for extracting collagen small peptide freeze-dried powder from deep-sea cod skin, comprising the following steps: 1) pre-treating deep-sea cod skin: soaking the fresh or frozen cod skin, decomposing into fluid for reservation; 2) biological enzymolysis; 3) separating and purifying protein small peptide; 4) freezing and drying to get the collagen small peptide freeze-dried powder extracted from deep-sea cod skin. The invention provides a wider use range for the biological protein in waste cod skin.

The invention relates to a decellularization cornea preparation method, which adopts steps of corneal epithelium layer removing, ultraviolet cross-linking, viral inactivation, decellularization treatment, gradient dehydration, radiation protection and sterilization. According to the present invention, the prepared decellularization cornea has characteristics of complete antigen removing, no excitation of host acquired immunity reaction, good biocompatibility, low damage on nature corneal stroma, maintaining of structure characteristics of the nature corneal, and maintaining of effective components of the nature corneal so as to provide physical and chemical properties similar to the nature corneal; and after the prepared decellularization cornea is transplanted, animal experiment results show that characteristics of transparent transplanted cornea, no scar formation, no melting generation and no neovascularization are provided, the transplanted cornea and the recipient bed are completely integrated after transplanting a month, the transplanted cornea is subjected to complete epithelization after three months, corneal stroma cells migrate toward the decellularization cornea graft so as to prove that the tissue just takes place slow reconstruction, and the transplanted cornea after 6 months does not show significant difference in histology and appearance detection compared with the nature cornea.

The present invention relates to a two-dimensional preparative chromatography instrument system having the online enrichment function, and applications thereof. The system comprises a chromatography flow channel switching valve, a chromatography column, a solvent pump and a detector. According to the present invention, a trapping column collects a first-dimensional chromatography effluent component through valve switching and mobile phase dilution, and the trapped component is introduced into a second-dimensional preparative column through valve switching and mobile phase elution so as to achieve two-dimensional chromatography separation; the instrument system can perform two-dimensional separation, and the sample and the one-dimensional separation component are effectively retained and enriched through the trapping column interface, such that the column efficiency loss is low, and the two-dimensional separation effect is ensured; and the instrument system can enlargedly perform multiple circulation separations and multidimensional separation, and the separation effect can not be decreased along with the increasing sample volume and the increasing separation frequency. In addition, the instrument system further has the function of the concentration recovery on the finally-separated product so as to simplify the sample drying process, such that the degeneration of the sample during the heating drying process is easily be avoided.

The invention provides a preparation method of titanium matrix graphene alloy. The method comprises the following steps: preparing graphene and titanium and/or titanium alloy mixed powder, filling a jacket with the mixed powder, carrying out vacuum degassing, carrying out hot isostatic pressing, re-melting, and homogenizing. A certain amount of the titanium matrix graphene alloy precast ingots are re-melted in titanium alloy melt, the content of graphene in a composite material can be well controlled through calculating, and graphene cannot float, so the content of graphene in the titanium matrix graphene alloy can be accurately controlled; and the preparation method is provided on the basis of semi-continuous melting casting, and has the advantages of simple operation, high production efficiency, low preparation cost, and easy realization of large scale industrialization.

The invention provides a preparation method of a magnesium base graphene alloy. The method comprises the steps of: preparing mixed powder of graphene and magnesium and/or magnesium alloy, putting the mixed powder into a cover for vacuum degassing, performing hot isostatic pressing, remelting and performing homogenization treatment. According to the method, a certain quantity of magnesium base graphene alloy prefabricated ingot is remelted into magnesium alloy molten liquid; the content of graphene in a composite material is preferably controlled through calculation; as the graphene does not float out, the content in the magnesium base graphene alloy can be accurately controlled; and the preparation method is provided based on semi-continuous casting, and is simple in process operation, high in production efficiency, low in manufacturing cost and easy for realizing large-scale industrialization.

The invention discloses a brown fermented milk base material and a preparation method thereof. The preparation method comprises the following steps: (1) uniformly mixing raw materials to obtain a material liquid, wherein the material liquid comprises following components except for skimmed milk: 0.5-2g/L of low-poly xylose, 0.3-1g/L of sodium bicarbonate and 60-100g/L of fructose syrup; (2) sterilizing the material liquid at 115-123 DEG C for 300 seconds, performing Maillard reaction, cooling to 41-43 DEG C and pouring into a fermentation tank; (3) grafting a yogurt starter, wherein the yogurt starter includes 15-23g/T of Danisco 528, 11-13.7g/T of DSM1821 and 6-8mL/T of lactobacillus plantarum with the CGMCC No. 9405, and fermenting until the acidity is up to 70 degrees to obtain the brown fermented milk base material. A brown milk beverage prepared from the fermented milk base material has the comparable browning effect to similar products in the market and has better flavor, taste and nutrients compared with the similar products in the market; moreover, the production efficiency is greatly improved and the equipment utilization ratio is greatly increased.

The invention relates to a treatment method and an application of antibiotic bacterial residues, and aims to solve problems that existing bacterial residue treatment methods are long in period, still have the environmental risk after treatment and the like. The method comprises steps as follows: 1) fresh bacterial residues are placed in a reaction tank, the moisture content is controlled between 85% and 95%, and the bacterial residues are evenly mixed; 2) the reaction tank containing the bacterial residues is placed in a microwave reactor, heated to 100 DEG C by a microwave generator with the microwave power of 100-900 W and kept for 10 min; 3) the antibiotic bacterial residues after the reaction are subjected to centrifugal separation, and obtained bacterial residues are precipitated and dried. With the adoption of the method, antibiotic residues in the bacterial residues can be removed quickly, and harmless treatment and recovery of the bacterial residues are realized.

The production method of fluffy meat product includes the following steps: cutting fresh meat or frozen meat, injecting sterile salt water mixture with 2-4deg.C into meat, its injected quantity is 90-110% of meat weight, placing the injected meat into cold storage with 0-4deg.C, pickling for 12-16hr, then placing the pickled meat with 6-8deg.C into tenderizing device and vacuum rolling machine to make tenderization for 2-3hr., then cutting, curing and dewatering and drying so as to obtain the invented fluffy meat product.

The invention relates to liquid infant milk for newborn to six-month-old infants and a production method thereof. The liquid infant milk contains a certain amount of protein, fat, carbohydrate, vitamin A, vitamin D, vitamin E, vitamin K1, vitamin B1, vitamin B2, vitamin B6, vitamin B12, nicotinic acid, folic acid, pantothenic acid, vitamin C, biotin, sodium, potassium, copper, magnesium, iron, zinc, manganese, calcium, phosphorus, iodine, chlorine, selenium and lactoferrin, has comprehensive nutrition and can be used as a breast milk substitute for the newborn to six-month-old infants. The production method of the infant milk adopts a combined way of separately treating heat-sensitive materials and other materials, respectively adopting a combination of different processes and conducting membrane filtration and low-heat sterilization to the heat-sensitive water-soluble materials, can prevent the nutrient components of raw materials from being lost and degenerated, and can remove microorganisms on the premise that the nutrient components are reserved to the utmost extent.

The invention relates to the exhaust gas recovery field in the viscose fiber industry, and provides a device for recovery of carbon disulfide in viscose fiber production. The device is characterized in that: it comprises an alkali spray tower, an absorption tower, a heat exchanger, a desorption tower, a condenser and a gas-liquid separator. The spray tower is connected to the absorption tower, the absorption tower is in connection with the heat exchanger, the heat exchanger is connected to the desorption tower, the desorption tower is connected to the condenser, which is in connection with the gas-liquid separator. The device provided in the invention has the characteristics of simple structure, high absorption rate, low investment and operation cost, and suitability for industrialized application.

The invention relates to a heme protein functional magnetic surface enhanced Raman active substrate and an application thereof to the high-sensitivity detection of toxic micro-molecules and the rapid removal of the toxicity of the toxic micro-molecules, and belongs to the technical field of monitoring and detecting toxic ingredients in environment and food. The heme protein functional magnetic surface enhanced Raman active substrate is prepared by the following steps: synthesis, preparation and coating of a silver nano magnetic material, covalent adsorption of heme protein and spectrum detection of surface enhanced Raman scattering (SERS) and the like. The heme protein functional magnetic surface enhanced Raman active substrate and the application thereof have the beneficial effects that through the absorption of some toxic micro-molecules, the displacement of a heme protein resonance Raman peak can be caused, and the displacement has the molecular specificity, therefore, the micro-molecules can be subjected to multi-component detection by the utilization of an SERS spectrum; with the addition of the aggregation of magnetic nano materials under the magnetic field conditions, the concentration of molecules to be detected and the SERS enhancement capacity can be improved. The silver nano magnetic material in the heme protein functional magnetic surface enhanced Raman active substrate has a great application potential in the fields of food safety, environment monitoring and protection and the like.

The invention relates to a frozen aquatic product quality assurance agent. The frozen aquatic product quality assurance agent is prepared from, by mass, xylooligosaccharide 3-5%, carrageenan oligosaccharide 2.5-4%, trehalose 1-2%, agar powder 0.5-1.5%, alkaline phosphate 0.2-0.3% and the balance water. In addition, the invention further relates to a preparation method of the frozen aquatic product quality assurance agent and application of the preparation method in frozen aquatic products. Compared with the prior art, the frozen aquatic product quality assurance agent can effectively prevent freezing preservation from affecting the water retaining properties, tenderness, gelling properties and nutritional values of the aquatic products, can form a dense protective layer on the surfaces of the aquatic products and effectively prevent the aquatic products from being oxidized and being subjected to external microbial infection, keeps the good quality of the aquatic products during frozen storage and makes the aquatic products obtain good economic values.

The invention relates to milk and a preparation method thereof, in particular to infant liquid milk which is added with lactalbumin and is suitable for infants from the birth date to six months, belonging to the dairy technical field. The compositions of the infant liquid milk are: 180 to 350 kilograms of milk, 1 to 10 kilograms of cream powder, 1 to 10 kilograms of condensed lactalbumin 34 (with a lactalbumin content of 33 percent), 10 to 80 kilograms of demineralized whey powder D70 (with a lactalbumin content of 12 percent), 1 to 8 kilograms of emulsifying stabilizers, and 630 to 800 kilograms of water, wherein, one part of proteins come from the milk (or reconstituted milk) and the other part of the proteins come from addition of lactalbumin. The infant liquid milk of the product has balanced nutrition, smooth mouthfeel, easy absorption, and can meet the demand of regular growth and development of infants.

The invention discloses acipenser dabryanus sperm preserving fluid liquid and a preparing method and application. The acipenser dabryanus sperm preserving fluid liquid comprises saccharose, mycose, trihydroxy aminomethane, potassium chloride, reduced glutathione and carbinol. The acipenser dabryanus sperm preserving fluid liquid has simple components and is low in cryopreservation cost. The added reduced glutathione plays a good role in antioxygenation, well protects sperm plasma membranes and reduces damage to DNA molecules. The added mycose has the effects of preventing protein denaturation and effectively protecting sperms. By means of the acipenser dabryanus sperm preserving fluid liquid, motility of unfreezed sperms is higher than 70%, and the fertility rate reaches 45%.

The invention provides a phase change temperature control fiber. The phase change temperature control fiber is characterized by comprising a microstructure fiber matrix and a phase change material, wherein the microstructure fiber matrix comprises three-dimensional communication holes, the phase change material fills the three-dimensional communication holes, and each three-dimensional communication hole is of a three-dimensional structure with two or more holes communicating with each other. Compared with the prior art, the phase change temperature control fiber has the following advantages:first, the filling loading capacity and cycling stability of the phase change material are improved through the fiber structure design; second, through fiber surface treatment and fiber internal doping technology, good water resistance and mechanical properties of the fiber are realized; finally, the phase change composite hydrophobic temperature control fiber provided by the invention has the functions of keeping warm and cooling in the aspect of temperature regulation and control; in the aspect of material selection, the universality is achieved, most of commercial fiber materials can be adopted, then the fiber is suitable for industrial amplification application, and meanwhile, different materials can be designed according to actual needs; and in the aspect of fabric forming, a phase change temperature control fabric can be directly woven by the phase-change fiber, and also can be woven after yarns are prepared.