551 results about "Soybean Proteins" patented technology

The invention relates to the technical field of centrifugal machine PID control, in particular to a centrifugal machine control method and system for soybean protein production. Obtaining time sequence data of the rotating speed and the torque of the centrifugal machine, analyzing data differences and fluctuation trends, calculating abnormal indexes of state parameters at all moments, accurately identifying abnormal data points and abnormal moments, and positioning rotating speed sudden change key nodes; determining an abnormal time period based on the time sequence characteristic of the abnormal moment, analyzing the relation between the rotating speed and the torque, the similarity of abnormal indexes and the rotating speed fluctuation characteristic in the time period, quantifying the dynamic relation between the two, and formulating an adjustment index; aiming at the problem of control lag caused by fixed parameters of the traditional PID, the PID parameters are dynamically adjusted by combining the abnormal index difference of the rotating speed and the torque at the current moment and the adjustment index determined in the early stage, so that the control strategy is adaptively optimized along with the change of the working condition, and finally, the stable, efficient and accurate control on the rotating speed of the centrifugal machine is realized.

The invention belongs to the field of bioactive peptides. The invention provides an angiotensin converting enzyme inhibitory peptide as well as a screening method and application thereof. The amino acid sequence of the inhibitory peptide is GKGLW and / or GDGLKW. According to the screening method of the ACE inhibitory peptide, the soybean protein is taken as a raw material, and the ACE inhibitory peptide is prepared and screened by adopting a targeted alkaline protease and chymotrypsin double-enzymolysis technology, so that rapid screening of the ACE inhibitory peptide is realized, and an experimental basis is provided for the structure-function relationship of the ACE inhibitory peptide. The inhibitory peptide provided by the invention has strong antihypertensive activity, high safety and no toxic or side effect. Digestive tract stability determination shows that the inhibitory peptide has good gastrointestinal tract stability in gastrointestinal tract digestion, and can still keep good activity after entering blood.

The invention discloses a method for preparing an animal adipose tissue simulant by using soybean protein and application of the animal adipose tissue simulant, and belongs to the technical field of deep processing of vegetable protein. Soybean protein is used as a raw material, the soybean protein and polysaccharide are compounded and heated to form thermal induction gel, then microgel particles are obtained through mechanical shearing and crushing, and recombinant soybean protein emulsion gel, namely the animal adipose tissue simulant, is prepared through vegetable oil emulsification and glutamine transaminase covalent cross-linking. The fat-reducing sausage is used as a substitute of pig back fat and is applied to development of fat-reducing sausages. The animal adipose tissue simulant prepared by the invention has texture and melting characteristics similar to those of animal pig back fat. The invention provides the preparation method of the plant-based fat simulant, which meets the requirements of environmental protection and health and sustainable production, not only meets the requirements of texture and melting characteristics of solid fat, but also provides technical support for high-value application of soybean protein in the field of plant meat foods.

The invention discloses a hybrid sturgeon feed and a preparation method thereof, and relates to the technical field of sturgeon feeds, and the key point of the technical scheme is that methionine and lysine are supplemented in a feed in which soybean protein concentrate replaces fish meal, so that the influence of methionine and lysine on the growth performance, liver and intestinal health and muscle quality of hybrid sturgeons is improved. The soybean protein concentrate is used for replacing the fish meal, so that the dosage and production cost of the fish meal are greatly reduced, and meanwhile, the methionine and the amino acid are added, so that the negative influence caused by replacing the fish meal with the soybean protein concentrate is avoided.

The invention provides a soybean protein nanoparticle coagulant for removing perfluorinated compounds in water as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly, preparing N, N-dimethyl hexadecylamine and epoxy chloropropane into a reaction precursor, namely epoxy propyl hexadecyl dimethyl ammonium chloride; meanwhile, hydrolyzing the soybean protein isolate by using protease to obtain a hydrolyzed soybean protein solution; enabling the epoxy group on the epoxy propyl hexadecyl dimethyl ammonium chloride and the amino group on the hydrolyzed soybean protein to be subjected to ring-opening addition reaction so as to be grafted to the hydrolyzed soybean protein, and adding acetone to generate precipitate after the reaction is finished; and collecting the precipitate, washing and drying to obtain the soybean protein nanoparticle coagulant for removing the perfluorinated compounds in the water. The soybean protein nanoparticle coagulant prepared by the invention utilizes strong electrostatic interaction and hydrophobic interaction, the removal capacity and selectivity of the soybean protein nanoparticle coagulant on PFAS are far higher than those of a traditional coagulant, and the soybean protein nanoparticle coagulant has excellent removal efficiency and remarkable anti-interference capability.

The invention discloses a dCAPS molecular marker for rapidly identifying the content of soybean protein and application of the dCAPS molecular marker. An upstream primer sequence of a primer pair for amplifying the dCAPS molecular marker is as shown in SEQ ID No. 1, and a downstream primer sequence is as shown in SEQ ID No. 2. According to the invention, the mispairing base primer is introduced to carry out PCR amplification and enzyme digestion on the to-be-detected soybean genome DNA, and the soybean protein content can be identified according to the band size of the enzyme digestion product. The dCAPS molecular marker disclosed by the invention can be used for identifying or assisting in identifying the soybean protein content, a high-protein soybean variety and a low-protein soybean variety are distinguished from the molecular level, and the dCAPS molecular marker has important significance on soybean molecular marker assisted breeding and high-protein soybean screening and cultivation.

The invention discloses a KASP molecular marker for identifying soybean protein content and application, and relates to the technical field of biology and application of an SNP locus, the SNP locus takes a soybean Wm82.a2.v1 genome sequence as a reference genome, is the 42148495th SNP on a soybean chromosome 9 and corresponds to the 20th basic group from the 5'terminal of the sequence shown in SEQ ID NO: 1, and when the locus is TT homozygosis, the corresponding genotype is A; when the site is AA homozygous, the corresponding genotype is B; according to the application, different protein contents of soybeans are screened or screened in an auxiliary mode, and the different protein contents of the soybeans are as follows: the homozygous soybeans of the genotype A are higher than or candidate to be higher than the homozygous soybeans of the genotype B. The molecular marker has important theoretical significance and economic value for molecular marker-assisted selection of soybean germplasm or breeding offspring materials with high protein content.

The invention relates to the field of food, and provides a soybean protein product and a preparation method thereof.The method comprises the steps that soybean and water are subjected to pulp grinding and centrifugal treatment, and residue-removed soybean milk and soybean residues are obtained; performing cold precipitation and centrifugal treatment on the residue-removed soybean milk to obtain a cold precipitation precipitate and a cold precipitation supernatant; carrying out ultrafiltration treatment on the cold precipitation supernatant, and collecting retentate; respectively drying the cold precipitation precipitate and the intercepted substance to obtain a cold precipitation dried substance and an intercepted dried substance; and carrying out mixing treatment on the cold-precipitated dried substance and the intercepted dried substance to obtain the soybean protein product. The soybean protein product prepared by the method contains all amino acids essential to human bodies, the proportion of the amino acids is close to that of ideal amino acids, and the nutritional value is high. Moreover, the method is simple and convenient to operate, low in cost and suitable for large-scale production.

The invention discloses a preparation method of a green adhesive with a biomimetic mineralization structure, which comprises the following steps: dissolving polysaccharide in deionized water, adding calcium salt, stirring, adding carbonate into the mixture, and inducing crystal nucleation of CaCO3 biominerals by using the polysaccharide as an organic template and adsorbing calcium ions and carbonate ions layer by layer, thereby obtaining the green adhesive with the biomimetic mineralization structure. After the growth reaction is finished, products are collected through vacuum filtration, and CaCO3 biominerals are obtained; and finally, mixing the soybean protein with deionized water, then adding the CaCO3 biomineral for ultrasonic treatment, and then adding the plant polyphenol to establish a compatible interface between the CaCO3 biomineral and the soybean protein, thereby obtaining the green adhesive with the biomimetic mineralization structure. The green adhesive prepared by the preparation method disclosed by the invention has strong adhesive power and multifunctionality, and is green and environment-friendly.

The invention discloses an application of a gene GmAGO5 of a soybean ARGONAUTE family. The gene GmAGO5 of the soybean ARGONAUTE family is shown The nucleotide sequence of the soybean GmAGO5 protein coding gene GmAGO5 is as shown in SEQ ID NO. 1. The invention also discloses a preparation method of the soybean GmAGO5 protein coding gene The constructed plant gene editing knockout vector pSCM-GmAGO5 is transferred into an acceptor material Tianlong No.1 by using a cotyledonary node transformation method. The GmAGO5 gene is knocked out, so that the plant height of the gene edited soybean is reduced, the branch included angle is reduced, and the protein content of the soybean seeds is remarkably increased. Therefore, the soybean GmAGO5 protein coding gene GmAGO5 disclosed by the invention can be applied to reducing soybean plant height, reducing branch included angle and improving the protein content of soybean seeds through a genetic engineering means.

The invention relates to application of an overexpressed soybean GmMYB306 gene in preparation of a product for improving resistance of crops to soybean phytophthora root rot, and belongs to the technical field of bioengineering. The invention provides application of an overexpressed soybean GmMYB306 gene in preparation of a product for improving the resistance of crops to soybean phytophthora root rot. The nucleotide sequence of the soybean GmMYB306 gene is shown as SEQ ID NO. 1. The soybean GmMYB306 protein disclosed by the invention can interact with a disease-resistant related protein GmNPR1, and the defense capability of soybean plants to phytophthora sojae is improved by regulating and controlling the expression of a crop disease course related gene GmPR1, so that the soybean GmMYB306 protein plays an important role in improving the resistance of the soybean plants to phytophthora sojae root rot.

The present disclosure relates to low density, high protein, grain-based ready-to-eat food pieces, compositions including such food pieces, and methods of making such food pieces. The pieces include a grain flour in an amount of about 28% to about 55% by dry weight, about 28% to about 40% by dry weight protein, where at least a portion of the protein ingredients include a protein with a PDCAAS greater of at least 60%, such as pea protein, fava bean protein, or soybean protein, and about 10% to about 35% by dry weight low DE carbohydrate.

The invention discloses a method for preparing soybean protein hydrolysate-polysaccharide composite gel based on enzymolysis treatment, and belongs to the technical field of food processing and manufacturing. According to the method for preparing the soybean protein hydrolysate-polysaccharide composite gel based on the enzymolysis treatment, the soybean protein hydrolysate is prepared by performing enzymolysis treatment on the soybean protein through papain, and meanwhile, the polysaccharide is added in an auxiliary manner, so that a theoretical basis is laid for actual production and industrial application of soybean protein products with excellent gel property. The main process comprises the following steps: (1) carrying out extrusion puffing treatment and enzymolysis; (2) spray drying; (3) papain treatment; (4) adding carrageenan; and (5) heating, cooling and molding. The gel property of the soybean protein is effectively improved through the action of the papain and the addition of the polysaccharide, better economic benefits can be created for soybean gel products and the processing industry of the soybean gel products, development of the technical field of food processing and manufacturing is promoted, and remarkable economic and social benefits are achieved.

The invention discloses application of GmFLZ protein or a coding gene thereof in drought tolerance of plants, in particular to application in drought tolerance of soybeans. The soybean GmFLZ protein or the coding gene thereof provided by the invention has a soybean drought-enduring function. According to the invention, the GmFLZ gene is introduced into soybean roots through an agrobacterium transformation method, so that a GmFLZ gene overexpressed soybean complex plant is obtained, and the drought tolerance of soybeans is remarkably improved.

The invention discloses a method for preparing a double-nutrition fat substitute based on soybean protein-silibinin compound high internal phase emulsion, and belongs to the technical field of food processing. The method comprises the following steps: respectively preparing a soybean protein solution and a silybin solution to form a soybean protein-silybin compound, dissolving resveratrol into an oil phase by virtue of an ultrasonic dispersion means, and homogenizing at a high speed to prepare a soybean protein-silybin compound high internal phase emulsion as the double-nutrition fat substitute. The milk is green, healthy, low in cost and environment-friendly, and caters to the consumption requirements of vegetarians, people with specific diet requirements and people complying with religious diet restrictions, and the addition of the silibinin improves the antioxidant activity and stabilizes the emulsion interface, and endows the emulsion with antibacterial performance. Meanwhile, the resveratrol carried by the emulsion enables the fat substitute to have potential health benefits and nutritional value. The method for preparing the double-nutrition fat substitute which is similar to real fat in texture and healthy by packaging natural polyphenol through the soybean protein-silibinin high-internal-phase emulsion provides a wider development thought for application of the high-internal-phase emulsion; and the method is beneficial exploration of using the emulsion based on the vegetable protein as an effective substitute of saturated fat in various foods.

The invention discloses an application of a soybean ZF-HD protein coding gene GmZFHD11 in the aspect of influencing the quality of soybean seeds. The nucleotide sequence of the soybean ZF-HD protein coding gene GmZFHD11 is as shown in SEQ ID NO. 1. The invention also discloses a preparation method of the soybean ZF-HD protein coding The constructed plant overexpression vector pBA002-GmZFHD11 is subjected to agrobacterium tumefaciens-mediated soybean genetic transformation to obtain a soybean receptor variety Jack, and it is found that compared with a receptor control group, the content of sulfur-containing amino acid in seeds is increased, the content of protein is increased, the content of beta-conglycinin (7S) is reduced, the content of glycinin (11S) is increased, and the 11S / 7S ratio is increased; and the quality of the overexpressed transgenic soybean strain seed protein is improved. Therefore, the gene can be introduced into plants as a target gene to improve the quality of soybean grain protein.

The invention belongs to the field of cellulose materials, and particularly relates to a functional cellulose fiber as well as a preparation method and application thereof. The functional cellulose fiber comprises a core structure formed by fiber raw materials and a skin layer structure formed by functional components, the skin layer structure covers the surface of the core structure, and the functional components are selected from one or more of silk fibroin, sodium alginate and soybean protein. The cellulose functional fiber with the skin-core structure is prepared, the core layer is a cellulose layer, high strength is provided, the skin layer is a functional layer, and good comfort is provided.

The invention discloses a cross-platform soybean seed protein content estimation method based on a spectral time sequence. The method comprises the following steps: step 1, acquiring high spectral data of a soybean canopy; 2, collecting a soybean multispectral image; step 3, acquiring soybean physiological parameters and grain protein content data; step 4, obtaining soybean photosynthetic parameter data; step 5, calculating a vegetation index for estimation; step 6, constructing a vegetation index time sequence; 7, screening an optimal time window; 8, extracting dynamic characteristics; step 9, establishing a model, estimating the soybean protein content, and performing precision verification; and step 10, carrying out mobility analysis on the model from a near-ground canopy to a satellite platform. According to the method, a theoretical basis and a practical path are provided for realizing remote sensing-based soybean GPC accurate monitoring, wide application of the method on a satellite remote sensing platform can be promoted in the future, and high-precision, high-time-efficiency and large-scale soybean GPC estimation is realized.

The invention discloses a high-energy-storage flexible wood fiber board as well as a preparation method and application thereof, and belongs to the field of wood functional materials. Non-isocyanate polyurethane formed by reaction of epoxidized soybean oil cyclic carbonate and soybean protein is dispersed in a polyacrylamide chain; external stress is transferred and energy is dissipated under the hydrogen-bond interaction between a polyacrylamide chain and non-isocyanate polyurethane, so that the toughness of the adhesive is improved; meanwhile, a three-dimensional network structure formed after porous wood fiber materials are mixed is utilized, a conductive material is introduced, conductive composite wood fibers are prepared, a multi-dimension-multi-scale layering directional composite assembling technology of the wood fiber materials and a novel conductive adhesive is adopted, directional transmission of charges from polymers to wood pore channels is achieved, and the purpose of conducting the conductive composite wood fibers is achieved. The flexible wood fiber board has the characteristic of intrinsic high energy storage, the problem that traditional furniture has a single carrier function is solved, and high-value utilization of wood materials is promoted.

The invention discloses a method for effectively relieving soybean antigen protein Glycinin in fish feed and application of the method. The invention discloses application of N-acetylcysteine as a functional feed additive capable of relieving carp enteritis induced by soybean antigen protein Glycinin. The feed disclosed by the invention comprises a soybean antigen protein Glycinin and N-acetylcysteine (NAC). According to the present invention, 1.5-6.0 g / kg of NAC is added to a feed containing 80 g / kg of Glycinin, such that the fish growth, the feed utilization rate, the digestion function, the protein metabolism function, the immune function, the oxidation resistance and the intestinal morphology can be significantly improved, and the soybean antigen protein Glycinin-induced growth inhibition and the intestinal injury can be effectively relieved; the functional fish feed additive provided by the invention is relatively low in cost and easy to popularize, and is beneficial to development of novel green antibiotic-replacing additives, improvement of the utilization rate of soybean protein sources, reduction of feed cost and promotion of healthy culture of fishes.

The invention discloses a method for preparing a natural sunscreen quick-drying clothes fabric from plant extracts. The method comprises the following specific steps: weighing corresponding linen fibers, soybean protein fibers, apocynum venetum fibers, bamboo charcoal fibers and seaweed cellulose fibers; s2, the fibers are sequentially taken out of the cotton bale according to the proportion, blowing, cotton carding and spinning processes are carried out respectively, and corresponding spun yarns are obtained; s3, performing sliver mixing and spooling on the spun yarns obtained from all the fibers to obtain blended spun yarns; s4, a seamless spinning process is adopted, the blended spun yarn is sequentially subjected to twisting, warping, slashing and fabric forming to form the fabric, and the corresponding blended fabric is obtained; s5, the blended fabric is subjected to scouring and bleaching, dyeing, post-finishing, shaping and drying, and the sun-proof quick-drying fabric is obtained. According to the sun-proof quick-drying fabric, blending is conducted through the plant fiber technology, the blended fabric has a certain sun-proof function and meanwhile has excellent quick-drying performance, the titanium dioxide nano aerogel is applied to extraction of plant extracts, and the anti-ultraviolet performance of the fabric is improved.

The invention discloses an elastic chewable nicotine oral product and a preparation method thereof. The elastic chewable nicotine oral product comprises a nicotine source and an additive, the nicotine source is dissolved in the mixed solution of the additive, so that the nicotine oral product forms a soft elastomer, and the nicotine is slowly released in the oral cavity through chewing; the nicotine source is extracted or chemically synthesized from tobacco; the additive comprises a gelling agent, and the gelling agent comprises one or a combination of more of gelatin, agar, konjac polysaccharide, xanthan gum, pectin, carrageenan, sodium alginate, semen plantaginis polysaccharide, guar gum, gellan gum, curdlan, whey protein, casein or soybean protein. The gel is added into the carrier to realize physical embedding of the nicotine, the elastic and chewable oral nicotine product can be obtained without bonding fixation, and the nicotine is released through gel swelling-diffusion regulation, so that the oral nicotine product has no residue in the oral cavity and does not pollute the package when being used, and the purposes of dynamically releasing the nicotine and improving the consumption experience are realized.

The invention discloses functional recombinant soybean protein isolate emulsion gel as well as a preparation method and application thereof, and belongs to the technical field of soybean protein processing. The preparation method comprises the following steps: recombining three main components, namely soybean lipophilic protein, glycinin and beta-conglycinin, in soybean protein isolate (SPI) according to a certain compounding ratio, and carrying out combined modification on the recombined SPI by virtue of modification means such as ultrasonic treatment, heat treatment, magnetic field and enzyme crosslinking; the recombined SPI emulsion is subjected to micronization treatment by adopting high-pressure microjet homogenization treatment, and then the emulsion is jointly induced to be gelatinized by utilizing acid and salt ions and transglutaminase, so that the preparation efficiency, the structural strength and the stability of the emulsion gel are improved; two polyphenols, namely epigallocatechin gallate and quercetin, are co-embedded in an interface and an oil phase of the emulsion gel, so that the bioaccessibility and antioxidant activity of the polyphenols are improved, and the emulsion gel is endowed with functionality. The prepared emulsion gel can be widely applied to processing of functional food.

The invention discloses a preparation method of soybean milk powder for promoting immune regulation, and belongs to the technical field of soybean product processing. Performing biological enzymolysis; modifying soybean protein; compounding functional components; and preparing the microcapsule. An ultrasonic-enzyme composite extraction technology is applied, and the enrichment rate of components with immunocompetence is increased. According to the method, the Maillard reaction is performed on the soybean protein and the polysaccharide by utilizing an ultrasonic-assisted heating technology, so that the emulsifying characteristic of the soybean protein isolate is improved, and the immunoregulation promoting performance of the soybean protein isolate is greatly improved. According to the invention, through a microcapsule embedding technology, glycosylated soybean protein is wrapped in the particles by a wall material formed by galactooligosaccharide and resistant dextrin, the stability and bioavailability are improved, the microencapsulation efficiency is greater than 95%, and the immunoregulation promotion performance of the microencapsulated soybean protein is effectively exerted. By adopting spray drying, inactivation of immune active components caused by high temperature is avoided.

The invention relates to the technical field of bio-based water treatment materials, in particular to a soybean protein / polyvinyl alcohol-dopamine composite water treatment material with a sponge structure, which is prepared by the following steps: step 1, preparing carboxylated polyvinyl alcohol; 2, introducing dopamine hydrochloride to react with the polyving akohol solution to obtain a dopamine grafted polyving akohol solution; step 3, performing dialysis and rotary evaporation concentration treatment on the dopamine grafted polyvinyl alcohol solution to obtain a dopamine grafted polyvinyl alcohol concentrated solution; 4, soybean protein isolate is added into the dopamine grafted polyvinyl alcohol concentrated solution, and a compound is obtained after freeze drying; and step 5, putting the compound into an n-hexane solution of methyltrimethoxysilane for soaking, and finally drying in a drying oven to obtain the soybean protein / polyvinyl alcohol-dopamine composite water treatment material with the sponge structure. The material is environment-friendly, has an elastic and porous structure, can repeatedly adsorb oil products, and has selective adsorption on cationic dyes.

The invention provides a novel compound feed for leuciscus waleckii, which comprises the following components: 10 to 30 percent of fish meal, 8 to 12 percent of soybean protein concentrate, 15 to 20 percent of flour, 3 to 6 percent of casein, 0.5 to 2 percent of gelatin, 4 to 6 percent of corn protein powder, 2 to 3 percent of soybean oil, 2 to 3 percent of fish oil, 18 to 24 percent of dextrin, 0.3 to 0.6 percent of mineral substance and vitamin premix, 0.2 to 0.6 percent of choline chloride, 1.5 to 2.5 percent of monocalcium phosphate, 0.05 to 0.12 percent of vitamin C ester, 2.5 to 3.5 percent of microcrystalline cellulose and the balance of water. The non-grain novel protein source defatted tenebrio molitor powder is used for partially replacing the fish meal, and the replacement proportion is 0-60%. The invention further provides a preparation method of the novel compound feed for the leuciscus waleckii, and the obtained feed is used for the leuciscus waleckii and can promote the growth performance, the digestive function, the protein metabolism function, the lipid metabolism function, the immune function and the oxidation resistance of the leuciscus waleckii. The invention provides a theoretical reference for developing a novel non-grain protein source, saving fish meal protein, reducing the feed cost and optimizing the artificial compound feed for the leuciscus waleckii.

The invention relates to a preparation method of a high-performance soybean protein emulsion film, which comprises the step of carrying out fibrosis denaturation on soybean protein by adopting an acetic acid-water binary solution, so that the hydrophobic property, the film-forming ability and the environmental interference resistance of the soybean protein can be remarkably improved. And further starting from a protein self-assembly fibrosis principle and a protein film forming theory, a soybean protein-based biological membrane with certain mechanical strength and flexibility is constructed through self-assembly fibrosis denaturation of protein molecules in an aqueous solution, so that the problems of poor mechanical property and high solubility of the existing protein-based biological membrane are effectively solved.

The invention provides a mineralized gel type physalis alkekengi leavening agent and application thereof in preparation of physalis alkekengi tofu. The method comprises the following steps: firstly, forming an EGCG-Ca < 2 + > complex from epigallocatechin gallate and tricalcium phosphate in soybean clear water, inducing TCP nanosheets to be self-assembled, and interpenetrating with a soybean protein network to construct a mineralized gel skeleton; the mineralized gel type sour slurry leavening agent is prepared by firstly preparing a skeleton, then immobilizing lactic acid bacteria in micropores of the skeleton and finally performing electrostatic grafting on soybean peptide, so that the gel strength, the water binding capacity, the flavor and the like of sour slurry bean curds are improved, and the nutrition and the quality of the bean curds are further improved.

The invention discloses a preparation method of high-solubility soybean protein powder, and belongs to the technical field of food processing. The method comprises the following steps: preparing a polysaccharide aqueous solution, preparing a soybean protein dispersion liquid, carrying out co-crushing treatment on the polysaccharide aqueous solution and the soybean protein dispersion liquid by adopting a high-energy fluid mill to obtain a polysaccharide-soybean protein aqueous solution, and finally, carrying out spray drying on the polysaccharide-soybean protein aqueous solution to obtain the soybean protein polysaccharide. The high-solubility soybean protein powder can be obtained. The prepared soybean protein powder is good in solubility, and the preparation method is simple, large in production amount, green and environmentally friendly and has wide industrial application prospects.

The invention relates to a potato extract-containing composition capable of prolonging satiety as well as a preparation method and application of the potato extract-containing composition. The composition comprises the following raw materials in parts by weight: 30-40 parts of a plant extract, 10-20 parts of a protein component, 30-40 parts of a dietary fiber component and 5-10 parts of an auxiliary material, wherein the plant extract comprises a potato extract, a white kidney bean extract, a tea flower extract and a lotus leaf extract, the protein component is at least one of pea protein, soybean protein and oat protein, and the dietary fiber component is a composition of inulin, resistant dextrin, psyllium husk powder, apple fiber powder and citrus fiber powder. The composition disclosed by the invention has remarkable advantages in the aspects of controlling body weight and managing satiety, the weight-losing effects of reducing heat absorption, prolonging satiety and promoting metabolism are realized in multiple dimensions, the long-term value of sustainable metabolic health support is formed, and the composition can be used for preparing weight-losing and body-shaping functional foods.