103 results about "Heat denaturation" patented technology

The present invention provides a method for the rapid simultaneous production of a plurality of single-stranded DNA circles having a predetermined size and nucleotide sequence using pre-designed hairpin oligonucleotides containing complementary sequences for directing ligation to form dumbbell-shaped monomers followed by heat denaturation to yield single-stranded DNA circles.

The invention provides method for therapeutic protein drug development that incorporates therapeutic and / or formulation and / or manufacturing considerations in the early screening process. The approach involves screening a plurality of different variants of a domain that have been determined to have the desired therapeutic property to identify one or more variants that have desired therapeutic and / or formulation characteristics, and constructing the full multidomain proteins using the identified domain variants. The present invention also provides a method for determining the shelf life of multidomain proteins in formulations. The method comprises determining a thermal denaturation and / or renaturation curve of a domain of the protein whose unfolding leads to aggregation of the protein in a solution. The method evaluates the shelf life of the multidomain protein based on the denaturation / renaturation curve. The invention also provides methods for engineering multidomain proteins to improve their therapeutic and / or formulation characteristics.

The invention relates to a quantitative detection method for thermal-denaturation and non-denaturation bovine alpha-lactalbumin in milk and milk products by applying an enzymolysis-liquid chromatography and mass spectrometry combination technology. The quantitative detection method comprises the steps as follows: taking a certain amount of milk or milk samples, dissolving and diluting the milk or milk samples in water to obtain solution with total protein content being about 1mg / mL; after volume metering, correctly sucking 500 mu L, adding an internal standard substance, reacting disulfide bond with dithiothreitol (DTT), alkylating to protect sulfydryl produced in reaction by iodoacetamide (IAA), and then conducting constant-temperature and constant-time enzymolysis with trypsin; and separating enzymolysis products by reversed phase liquid chromatography, conducting detection with a mass spectrum multiple reaction monitoring (MRM) manner, and calculating the result by an internal standard method. The quantitation limit of the method is 0.001g / 100g; when adding amount is 0.2, 1.7 and 5.0g / 100g, the recovery rate is 98.9-110.8% (n is equal to 6) and repeatability: RSD (Relative Standard Deviation) is smaller than 7.6%; and the quantitative detection method can be applicable to the quantitative detection of samples with different contents of bovine alpha-lactalbumin.

This invention relates to phytases, polynucleotides encoding them, uses of the polynucleotides and polypeptides of the invention, as well as the production and isolation of such polynucleotides and polypeptides. In particular, the invention provides polypeptides having phytase activity under high temperature conditions, and phytases that retain activity after exposure to high temperatures. The phytases of the invention can be thermotolerant and / or thermostable at low temperatures, in addition to higher temperatures. The phytases of the invention can be used in foodstuffs to improve the feeding value of phytate rich ingredients. The phytases of the invention can be formulated as foods or feeds or supplements for either to, e.g., aid in the digestion of phytate. The foods or feeds of the invention can be in the form of pellets, liquids, powders and the like. In one aspect, phytases of the invention are stabile against thermal denaturation during pelleting; and this decreases the cost of the phytase product while maintaining in vivo efficacy and detection of activity in feed.

The present invention provides a method for the rapid simultaneous production of a plurality of single-stranded DNA circles having a predetermined size and nucleotide sequence using pre-designed hairpin oligonucleotides containing complementary sequences for directing ligation to form dumbbell-shaped monomers followed by heat denaturation to yield single-stranded DNA circles.

The invention discloses a method for separating purified ferritins from biological tissues or engineering bacteria. The method comprises the following steps of: performing mechanical lapping or ultrasonication by taking ferritin-enriched animal tissues or organs or engineering bacteria which are collected by fermenting and contain recombination ferritin genes as a raw material for extracting ferritins to obtain uniform serum, performing heat denaturation treatment on the filtered uniform serum in water with the temperature between 70 DEG C and 75 DEG C for 20 minutes, and centrifugally extracting supernatant to obtain a crude protein solution; performing dialysis equilibrium on the obtain crude protein solution, performing nickel column affinity chromatography and eluting by using 250 mM of competitive imidazole buffer solution to obtain electrophoretically pure ferritins; and further performing sepHarose 6B molecular sieve exclusion chromatography on the ferritins to obtain monomer ferritins and polymer ferritins which are separated from each other. By adopting the method, electrophoretically pure ferritins can be obtained by directly performing nickel column affinity chromatography in the absence of tag, so that purifying steps of the ferritins are greatly eliminated.

The invention relates to a making method of instant fresh sea cucumber, which is characterized by comprising the following steps: opening the abdomen of a fresh and live sea cucumber, completely removing internal organs, washing with clear water, placing into manganese salt solution which is 1-10 times the weight of the sea cucumber, adding an organic acid for adjusting the pH value to 4.0-6.0, placing the whole into a microwave sterilizer for microwave heating to 40-75 DEG C, and performing heat insulation treatment for 5-60 minutes; taking the sea cucumber out of the solution, and using ethanol solution containing 0.1-1% of tea polyphenol and 0.1-10% of propolis for impregnation or spraying the ethanol solution on the outer surface and the outer surface of the body wall of the sea cucumber; and performing compound modified atmosphere packaging on the sea cucumber so as to get the instant fresh sea cucumber. The instant fresh sea cucumber made through the method is low in loss of nutritional ingredients, the heat denaturation of protein is avoided, the instant fresh sea cucumber further has good taste and no fishy and astringency smell, and is convenient to preserve and take, simple in processing technology, short in period and low in energy consumption, and subsidiary ingredients can further increase the health care function of the sea cucumber while being used for processing.

A production technology of formula milk powder comprises the following steps: 1, dissolving an auxiliary material in pretreated raw milk A through utilizing a vacuum mixing method to obtain an auxiliary material solution, and carrying out vacuum concentration of pretreated raw milk B to obtain concentrated milk, wherein the solid concentration of the auxiliary material solution is 40-50wt%; 2, carrying out steam spraying sterilizing treatment of the auxiliary material solution obtained in step 1; 3, adding the auxiliary material solution obtained in step 2 to the concentrated milk obtained in step 1, uniformly mixing, and preheating to 65-75DEG C; and 4, carrying out spray drying to obtain the formula milk powder. The production technology only needs the raw milk B subjected to the vacuum concentration pretreatment, so the concentration evaporation amount is reduced, and the energy consumption is reduced; and simultaneously the vacuum concentration heat treatment of heat-sensitive raw materials comprising concentrated whey protein powder, vitamins and the like is avoided, so the protein heat denaturation and the heat losses of the heat-sensitive raw materials are reduced, and the nutritional quality of the formula milk powder is improved.

The present invention discloses one kind of recombinant analogous human collagen and its biological synthesis process. The recombinant analogous human collagen consists of one collagen region and one non-collagen region. The non-collagen region in the carboxyl group end of the collagen region has one amino acid sequence originated the minor fibrin of T4 bacteriophage and as shown in SEQ ID No. 3, and the collagen region has the amino acid sequence shown in SEQ ID No. 2. The recombinant analogous human collagen has relatively high heat stability, high hydrophilicity, high biocompatibility, heat denaturation temperature and heat decomposition temperature higher than that of natural collagen, and stable structure. It may be applied widely in biomedicine material, tissue engineering, cosmetics, food and other fields.

The invention relates to the technical field of gene engineering and protein modification, and discloses a low-temperature exoinulinase mutant MutDL121EK5 with improved low-temperature adaptability and application thereof, the amino acid sequence of the mutant MutDL121EK5 is obtained by replacing DAAPL from the 121st site to the 125th site of wild exoinulinase InuAMN8 with five amino acids EEDRK, and the sequence of the MutDL121EK5 is shown as SEQ ID NO.1. Compared with a wild enzyme InuAMN8, the mutant enzyme MutDL121EK5 has the advantages that the low-temperature activity is improved, the mutant enzyme MutDL121EK5 is more easily subjected to thermal denaturation, the improvement of the low-temperature activity is beneficial to reducing the dosage of the enzyme or shortening the reaction time during low-temperature reaction, and the easy thermal denaturation is beneficial to controlling the reaction process of the enzyme through thermal treatment. The low-temperature exoinulinase mutant MutDL121EK5 disclosed by the invention can be applied to the industries of food, wine brewing, washing and the like.

The invention provides a method for extracting oil camellia seed polypepetide from oil camellia seed protein. The method sequentially comprises the following steps of preparing the oil camellia seed protein, crushing, screening, adding water to obtain suspension, carrying out heat denaturation treatment, regulating pH value, carrying out enzymolysis with compound enzyme, carrying out enzyme deactivation, centrifuging, extracting supernatant, desalting with resin, carrying out SephadexG-50 column chromatography, centrifuging, extracting the supernatant, and carrying out freeze drying to obtain the oil camellia seed polypepetide. By adopting the method for extracting the oil camellia seed polypepetide from the oil camellia seed protein, disclosed by the invention, the enzymolysis time is shortened, the energy consumption is reduced, the extraction rate of the oil camellia seed polypepetide is also improved, and the purposes of turning waste into wealth and having low energy consumption and low pollution are achieved.

The invention discloses a method for detecting H7N9 subtype avian influenza virus through loop-mediated isothermal amplification (LAMP). The method is used for detecting avian influenza virus in the fields of foods and raw materials, environmental samples, medical samples and health and disease prevention. According to the technical scheme, the method is characterized in that a specific primer is designed with regional gene sequences respectively coded as HA and NA in an avian influenza genome serving as target sequences, and a reaction system is optimized, so as to perform target gene specific amplification. The method only needs a constant-temperature device, does not need the thermal denaturation and long-term temperature cycle of a template, realizes the direct observation of the results, and has the characteristics of being low in cost, high in efficiency and simple in operation. The LAMP detection method of the H7N9 subtype avian influenza virus nucleic acid, created by the invention, has the characteristics of being high in specificity, high in sensitivity and convenient and quick, can be carried out in a grass-roots level or a small test site, and brings a novel technology and method for detecting the H7N9 subtype avian influenza virus.

A disclosed preparation method for sea cucumber polypeptide for promoting postoperation wound healing is characterized by comprising technological steps of pretreatment, heating denaturation, cooling fragmentation, heating enzyme-killing, coarse filtration and alcohol precipitation, vacuum condensation, standing precipitation, filtering and freeze drying. The prepared sea cucumber has good immunoloregulation effect on body, also has extremely substantial wound healing promotion effect, and is capable of promoting wound to heal 4-5 days early, and the healed wound is flat and no scar is left.

The invention discloses a preparation method a formaldehyde-free protein-based wood adhesive. According to the invention, fresh plant stems and leaves are added into water, and are crushed and press-filtrated, such that a juice is obtained; soybean meal and separated animal protein or separated vegetable protein are sieved by using a sieve of 60 to 300 meshes; the meshed materials are stirred with water according to a ratio of 0-1:1-0:5-15, until a crude protein content of the mixture is 7 to 20%; the mixture is placed in a reactor, and is stirred for 30min to 5h under a temperature of 45 to 65 DEG C and a pH value of 8.5 to 13.5, such that the mixture is subject to a reaction; when the temperature is reduced to 35 to 45 DEG C, the fresh plant stem and leaf juice obtained through the press-filtration step is added to the mixture of protein and water while stirring, wherein the juice takes 0.1% to 50% of the weight of the mixture; the content of adhesive mass crude protein is controlled, that when the adhesive is used in a plywood, the content is 11 to 13%, and when the adhesive is used in a fiber board, the content is 5 to 7%; the pH value of the material is regulated to 7.5 to 10.5, and the material is stirred for 15 to 45min; 0.00 to 0.50% of a preservative is added, and polyphenol is blended. The adhesive provided by the invention is not polluted by free formaldehyde, volatile phenols, isocyanate or synthetic resin. A conflict of protein denaturation and hydrolysis can be regulated by using a heat denaturation technology. When denaturation is finished, the reaction temperature and the pH value can be reduced instantly. With the invention, the produced artificial plates satisfy an international standard of II grade plates. After the plates are boiled for 4 hours by boiled water with a temperature of 100 DEG C, adhesive failure is not occurred.

The invention discloses a preparation method for active collagen from compound protease. The method comprises the following steps: 1) adding compound protease into pretreated fish skin mixed liquor for enzymatic hydrolysis, wherein the compound protease at least comprises two selected from the group consisting of papain, bromelain, trypsin, neutral protease, animal protein hydrolase, acidic protease and pepsin; 2) subjecting the obtained enzymatic hydrolysis liquid to centrifugation and taking supernatant; 3) subjecting the supernatant to ultrafiltration and concentration and then to salting-out; and 4) carrying out ultrafiltration, desalination and concentration; wherein the fish skin mixed liquor has a concentration of 2.0 to 8.0 wt% and a pH value of 2 to 6, and the addition amount of the compound protease is 2.0 to 8.0 wt% of the weight of the fish skin mixed liquor. The method provided by the invention has high security and no side-effects; and the prepared active collagen has the advantages of a high extraction rate, high purity, high thermal denaturation temperature and the like.

The invention discloses a production method of pasture fresh milk, comprising the following steps: (1) selecting fresh cow milk; (2) checking and accepting; (3) degassing; (4) clarifying the cow milk; (5) performing standardization; (6) blending, preheating and homogenizing; (7) performing plate-type pasteurization; (8) cooling and homogenizing; (9) performing aseptic packaging. The high-quality fresh milk in an own pasture breeding base is adopted as a base material, so the raw material source is natural and safe; in a production process, before a low temperature heat treatment sterilizing technology is adopted, bovine lactoferricin and a protein protectant are blended for the cow milk, so that the raw material protein heat resistance can be improved, denaturation by heating is not easy to cause, and meanwhile the mouthfeel and flavor of the raw material are improved; the bovine lactoferricin and the protein protectant further have the health efficacy of resisting bacteria and a synergistic effect, destroy nutrient components of the milk at a minimum level, have multiple bactericidal and antibacterial effects, and prolong the shelf life of the milk.

The invention discloses a heat resisting bovine colostrum immunoglobulin and a preparation method thereof, which is characterized in that two times of centrifugations are carried out on bovine colostrum to respectively remove fat and casein; ultrafiltration is carried out, then thermal denatured protective agents formed by fructo oligosaccharides, sorbitol, oligomeric maltose and glycine are added into the bovine colostrum, and at last heat resisting bovine colostrum immunoglobulin is prepared by low-temperature spray drying. Compared with common bovine colostrum immunoglobulin, the heat-resisting temperature of the immunoglobulin is increased by 12 to 15 DEG.C; next, the contents of the immunoglobulin can reach above 40 percent and is 20 to 30 percent higher than that of the immunoglobulin in common bovine colostrum; besides, the preparation method is low in energy consumption and cost, and by utilizing the technologies of ultrafiltration and concentration and low-temperature spraying, energy consumption is reduced by 50 percent compared with a freeze drying technology.

The invention discloses a rapid purification method for recombinant pyrolytic enzyme. According to the method, escherichia coli is used as an expression host of recombinant pyrolytic enzyme, the recombinant pyrolytic enzyme is subjected to inducible expression in host cells of escherichia coli, thalli are collected centrifugally, and escherichia coli is broken by heating to release expressed pyrolytic enzyme; meanwhile, host protein of escherichia coli is denatured, devitalized and precipitated at high temperature, which is favorable for purifying pyrolytic enzyme resisting to thermal denaturation; further, high-purity pyrolytic enzyme is obtained rapidly through the process of bacteria debris catching and protein concentration of pyrolytic enzyme through ultra-filtration. The rapid purification method is easy to operate; the escherichia coli protein thermal denaturation removal rate is high; the purification concentration efficiency is high; the method is adaptable to industrial production and marketing promotion and application.

In an information memory apparatus having minute areas for storing information arranged in x, y and z directions three-dimensionally, parallel rays are irradiated to a memory area MA in a direction perpendicular to a z-axis to take projection images of the memory area MA while rotating the memory area MA around the z-axis little by little. The light rays irradiated at this time have a size which covers at least a direction of an x-y plane of the memory area. A computation unit PU finds data and addresses of minute areas distributed three-dimensionally by performing computation based upon the principle of computer tomography on the projection images. As for data writing, a change is given to optical transmissivity or light emission characteristics by irradiating laser light focused by a lens OL placed outside the memory area to a desired minute area and causing heat denaturation within the pertinent minute area.

The invention discloses a thermocured electrospun egg-white protein micro-nanofiber membrane and a preparation method therefor. The micro-nanofiber membrane is prepared with an electrostatic spinning method; an organic solvent is not added in a preparation process; a micro-nanofiber forming the micro-nanofiber membrane is an egg-white protein / water-soluble macromolecular polymer composite fiber; and egg-white protein is thermal denatured and cured protein. The micro-nanofiber membrane has very high biocompatibility and degradability; the egg-white protein micro-nanofiber membrane has very good wettability, easily permeates the skin, is easily absorbed by the skin and is pure natural without side effects; the preparation method is simple; in the preparation process, natural egg white and a water-soluble macromolecular polymer are taken as raw materials and the organic solvent does not need to be extra added, so that the production cost is reduced and the environment is friendly; and therefore, the preparation method is suitable for large-scale production.

The invention discloses a grassland roasted lamb leg and a method for making same. The method for making the grassland roasted lamb leg comprises the steps of pre-treating the lamb leg, boiling with special components, roasting, cooling, sterilizing, baking and packaging. Because the lamb leg is boiled with special component, is roasted and is sterilized by rapidly increasing temperature stage by stage through consuming the least heat without overheating the lamb leg, the quality guarantee period of the grassland roasted lamb leg can be ensured, the nutrients of the lamb leg can not be lost due to overheating, and the thermal injury and denaturation of the grassland roasted lamb leg can be reduced. The grassland roasted lamb leg which is traditional food can be industrially produced on a large scale, keeps the traditional taste and nutrients and does not need to be processed on the spot so that the time and the labor are saved.

The invention discloses collagen and an extraction method thereof. The method includes the steps: 1) refrigerating and rubbing animal tissues containing the collagen in liquid nitrogen; 2) extractingthe collagen from the rubbed animal tissues by an acid / enzyme method to obtain collagen solution; 3) dialyzing and freeze-drying the collagen solution to obtain the powdery collagen. By the refrigeration-rubbing pretreatment method, the animal tissues containing the collagen is refrigerated in the liquid nitrogen in advance for a period of time and rubbed into powder under a certain frequency by arubbing instrument, a triple-helical structure and thermal denaturation temperature cannot be affected after treatment by the method, compared with an original acid-extraction method without refrigeration-rubbing, the extraction rate of the method is increased by 18%-82%, and the method is of great significance for application of the collagen and collagen-based biological materials.

Provided are a novel vacuum-pressure spray-drying method and a novel vacuum-pressure spray-drying apparatus suitable for drying and powdering a liquid raw material containing a substance susceptible to heat denaturation, such as a food raw material and a medicine raw material. The vacuum-pressure spray-drying method and the like include: an apparatus main body, which is kept at reduced pressure and includes a spray nozzle; superheated water vapor supplying means for supplying a superheated water vapor to the spray nozzle; liquid raw material supplying means for supplying a liquid raw material to the spray nozzle; cooling means for cooling the superheated water vapor and a vapor resulting from volatilization of the liquid raw material being discharged from the apparatus main body, and then collecting, as condensed water; pressure reducing means for keeping an inside of the apparatus main body at the reduced pressure through the cooling means; and product collecting means for collecting a powder product produced in the apparatus main body. The vacuum-pressure spray-drying method and the like include: simultaneously spraying the superheated water vapor supplied from the superheated water vapor supplying means and the liquid raw material supplied from the liquid raw material supplying means through the spray nozzle into the apparatus main body so as to atomize the liquid raw material in the apparatus main body; and subjecting an atomized raw material, which is produced by atomizing the liquid raw material, to heat exchange with the superheated water vapor, to thereby dry and powder the liquid raw material.

The invention relates to an antibacterial antioxidant whey protein isolate edible film and a preparation method thereof, and belongs to the technical field of food packaging. The whey protein isolateedible film is prepared by taking whey protein isolate as a main film-forming matrix, matching the whey protein isolate with a bamboo leaf antioxidant and sodium caseinate, adding a plasticizer, and performing the steps of uniform mixing, thermal denaturation, vacuum degassing, plate casting, drying, film uncovering and the like. The method is simple in process, the prepared whey protein isolate edible film is good in stretchability and high in strength, has the advantages of being low in moisture permeability, good in transparency, antibacterial and antioxidant, the shelf life of food can beeffectively prolonged, and the requirement for food packaging is met.

The invention discloses a desalination method for salted egg white, and the method is simple in technology, low in equipment requirement and high in desalination efficiency. The method is characterized by in that the method comprises steps of performing protein heat denaturation on salted egg white and performing water-washing immersion desalination on salted-egg-white protein; a coagulum prepared by desalinating salted egg white is crushed by a colloid mill and is enzymolyzed, the enzymolysis solution is subjected to condensation and spray drying, so that the salted-egg-white protein peptide powder is obtained. The salted-egg-white protein peptide powder does not have bitter taste, the freshness is same to that of a monosodium glutamate solution with the concentration of 0.5%, the protein recovery rate is 92% or more, the physical and chemical indexes of the salted-egg-white protein peptide powder accord with GB / T 22492-2008 standard requirements, and the peptide content is detected to be 70% or more according to GB / T 22493-2008 standard. The technology is simple, desalination efficiency is high, desalination rate reaches 96% or more, an asynchronous enzymolysis manner of papain and flavourzyme is employed when enzymolysis is performed, and the enzyme killing technology and the condensation technology of the enzymolysis solution are synchronously performed, the technology is simple, and the produced salted-egg-white protein peptide powder is good in quality, safe and reliable to eat, and is widely applicable to various nutrient food, health-care beverages and cakes.

The invention relates to a production method for a recombinant humanized superoxide dismutase and belongs to the bioengineering technology field. In the method, most of impure proteins are removed by utilization of copper salt heat denaturation; after centrifugation, bacteria and impurities are removed by microfiltration; concentration is carried out by utilization of ultrafiltration, salts and micromolecule impure proteins are removed; after anion exchange chromatographic purification, freeze drying is carried out. The purity of the superoxide dismutase can reach 92%, and the activity is 3170U / mg. During the separation process, no organic solvents are used, and protein denaturation caused by organic solvents is avoided. The method has simple operation and low cost, and is suitable for industrial production.

The invention discloses a production method of a Sacha inchi polypeptide. The method uses the properties that Sacha inchi protein has different solubility under different conditions and can be subjected enzymatic hydrolysis by protease, and that ultrafiltration membrane and nanofiltration membrane have different retention rate on substances with different molecular weights. The method is as below: extracting protein from Sacha inchi meal by water, separating Sacha inchi pomace, and conducting ultrafiltration on the aqueous extract to remove impurities to obtain purified water extract; mixing and heating Sacha inchi pomace and purified water extract for denaturation; conducting enzymatic hydrolysis, enzyme inactivation and separation to obtain a Sacha inchi polypeptide solution; conducting ultrafiltration impurity removal and nanofiltration concentration on the Sacha inchi polypeptide solution to obtain a Sacha inchi polypeptide a concentrated liquid; and conducting spray drying on the polypeptide concentrated liquid to obtain Sacha inchi polypeptide. The production method of Sacha inchi polypeptide has the advantages of low cost, high purity, white color, good flavor, edibility, high yield, strong function and mechanization.

The invention relates to a method for extracting CEL I nuclease in celery and discards measures adopting a plurality of high-speed or ultra-speed centrifugation and a plurality of gel filtration and ion exchange chromatography in the prior art. The method comprises the following steps: adding a small amount of sodium sulfite to extract so as to reduce and clear colored substances in the extract; adopting a thermal denaturation physical method to rapidly clear a great amount of foreign protein with poor temperature toleration; utilizing the characteristic that CEL I is the combination of glycoprotein and activated concanavalin to combine CEL I nuclease and concanavalin so as to remove the foreign protein and further purify the CEL I; and finally, selecting DEAE-Sepharose FF as a suitable medium for the CEL I by once chromatography purification. Accordingly, the extraction method replaces the time-consuming and expensive measures adopting a plurality of high-speed even ultra-speed refrigerated centrifugation, a plurality of gel filtration and ion exchange chromatography, and the like and achieves the aims that the CEL I nuclease is rapidly extracted from the celery and purified.

The invention relates to a making method of instant nutritional vegetable bean curd. The method comprises the following steps: preparing vegetable granules; preparing soybean milk; preparing bittern; boiling soybean milk, comprising: carrying out low temperature boiling on the prepared soybean milk, heating to 80DEG C in the boiling process, and carrying out heat insulation for 5min in order to carry out protein heat denaturation treatment; adding glucose accounting for 1% of the mass of the soybean milk when the temperature rises to 100DEG C, boiling for 10min to carry out glycosylation crosslinking polymerization, cooling to 80DEG C, and adding the prepared vegetable grains into the boiled soybean milk; adding the bittern to make bean curd; seasoning; compacting; and packaging to obtain the instant nutritional vegetable bean curd. Vegetable bean curd products with the characteristics of abundant nutrition, good color and taste, convenience and fastness can be directly made by adopting the making method, and the bean curd products have the advantages of good hardness, fine texture, good elasticity, unbreakable property and substantially improved mouthfeel. Determination results show that the protein content, the fat content and the vegetable content of the instant nutritional vegetable bean curd are greater than 16%, greater than 9% and greater than 5% respectively.