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36results about How to "Fast enzymatic hydrolysis" patented technology
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Protein collection and enzymolysis integrated sample pretreatment apparatus and its production
InactiveCN101470052ALarge amount of sample processingFast enzymatic hydrolysisPreparing sample for investigationChemistryProtein formation
The invention relates to a sample pretreatment device for improving protein analysis speed, which combines protein collection and enzymatic hydrolysis functions. The invention relates to a preparation method thereof. The sample pretreatment device comprises a centrifuge tube with an upper cover, which is characterized in that the middle part of the upper cover of the centrifugal tube is provided with a hole, the inner wall of the centrifugal tube is attached with an annular hollow porous rigid integral substrate layer whose surface is fixed with enzymes via active groups modifying the substrate. The sample pretreatment device has the advantages of large sample processing amount, fast protein enzymatic hydrolysis speed, simple manufacture method and low cost, which can be used for fast enzymatic hydrolysis of collected protein samples. The invention has high practical value for the research of high flux protein.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Method for preparing L-methionine by using acetylated saponification solution
ActiveCN103342671AReduce neutralizationEasy to separateSulfide preparationChemical industryAcetylation
The invention relates to a preparation method of L-methionine aiming at the field of the chemical industry. The preparation method comprises the following steps of: adding acid into an acetylated saponification solution which is used as a production raw material to adjust the pH, cooling and then performing crystallization to obtain D,L-acetylmethionine crystals; and adding the obtained D,L-acetylmethionine into amino invertase to perform resolution reaction so as to obtain L-methionine, and recycling remainders. According to the method, links for refining D,L-methionine are reduced, the saponification solution for producing the D,L-methionine is directly used for performing acetylation reaction, and the yield is up to 99%; and besides, neutralization and separation steps for production of the D,L-methionine are reduced, the L-methionine obtained by performing enzymolysis on recrystallized D,L-acetylmethionine at an enzymolysis speed which is higher than that of the conventional method is better in crystal form and whiteness, the purity is more than 99.5%, and the total yield of the L-methionine is improved to 70%. The preparation method is a comprehensive cycle process which is reasonable in design and reduces the production cost.
Owner:NINGXIA UNISPLENDOUR TIANHUA METHIONINE CO LTD
Method for preparing L-methionine
ActiveCN103420882AReduce manufacturing costAvoid pollutionOrganic compound preparationSulfide preparationMethionine biosynthesisMethionine preparation
The invention aims to the field of chemical engineering, and relates to a method for preparing L-methionine. According to the method, acetylated saponification liquid is used as production raw material, acid is added into the raw material, the pH is adjusted to be acidic, after reduced pressure distillation, an organic solvent is used for treatment, so that a solution containing D,L-acetyl methionine is obtained, then the organic solvent is removed to obtain D,L-acetyl methionine crystals, and a resolution reaction is performed on the produced D,L-acetyl methionine crystals, so that the L-methionine is obtained; the technology does not need refined D,L-methionine, the soponification liquid for producing the D,L-methionine is used for performing an acetylated reaction, and therefore production cost is reduced; after the acetylation, water is evaporated to dryness, the organic solvent is used for desalting, the yield of the D,L-acetyl methionine reaches 97-99%, and the purity of the D,L-acetyl methionine reaches above 96%; the enzymolysis speed of the D,L-acetyl methionine is higher than that of a traditional method, the obtained L-methionine is good in crystal form and whiteness, the purity reaches above 99.5%, and the total yield of the L-methionine is improved to 78%; according to the technology, a circulation technology is integrated, the design is reasonable, and production cost is reduced.
Owner:NINGXIA UNISPLENDOUR TIANHUA METHIONINE CO LTD
Preparation method of phosphorylated peptidoglycan
ActiveCN103397060AImprove permeabilityImprove playbackMicroorganism based processesFermentationPhosphateFreeze-drying
The invention discloses a preparation method of phosphorylated peptidoglycan. The method is characterized by comprising the following steps of: inoculating Lactobacillus acidophilus on a culture medium for cultivation, centrifuging to collect thallus, repeatedly washing the thallus, suspending the thallus in hydrofluoric acid solution for one night at 4 DEG C, centrifugally collecting cell wall sediment, and washing the sediment to become neutral; dissolving the sediment into Trypsin chymotrypsin phosphate buffer solution, inactivating in boiling water, centrifuging the liquid supernatant, washing the sediment; dissolving the sediment in diethyl ether, stirring and centrifuging to collect sediment, and washing the sediment with water until completely removing the smell of diethyl ether, then obtaining the peptidoglycan; dissolving the peptidoglycan in Lysostaphin phosphate buffer solution for performing enzymolysis and centrifuging, taking the liquid supernatant, centrifuging the liquid supernatant, and centrifugally washing the sediment with water to get micromolecule peptidoglycan; and finally, dissolving the micromolecule peptidoglycan in mixed phosphate solution, precipitating with alcohol after reaction, treating the alcohol precipitated peptidoglycan by freeze drying and redissolving, and adding the redissolved solution in a dialysis bag, performing dialysis concentration, and then, performing freeze drying to get the phosphorylated peptidoglycan. The method has the advantages of increasing the solubility remarkably and improving the immunological effect to a certain extent.
Owner:NINGBO UNIV
Method for preparing amino acid aqueous solution from dead chickens
PendingCN111850064AIncrease contentEasy to operateNitrogenous fertilisersFermentationAmino acid contentHydrolase
The invention discloses a method for preparing an amino acid aqueous solution by using dead chickens. The method comprises the following steps: mincing and heating: putting the dead chickens into a mincing device for mincing, adding water and proteolytic enzyme into the mincing device, and heating the mincing device; stirring: adding the minced dead chicken, water and a proteolytic enzyme mixtureinto a stirring device for stirring, adding a compound enzyme into the stirring device, and continuously heating the mixture; enzyme deactivation: putting the treated mixture into an enzyme deactivation tank for high-temperature enzyme deactivation treatment; and filtering: filtering the treated mixture, dividing the filtered mixture into filter residues and an amino acid aqueous solution, feedingthe filter residues back into the stirring device, mixing the filter residues with the newly added mixture, treating again, and collecting the separated amino acid aqueous solution for later use. Themethod has characteristics of simple operation, rapid enzymolysis, high amino acid content, significant environmental benefit and significant economic benefit.
Owner:NINGXIA SHUNBAO MODERN AGRI CO LTD
Method for extracting total flavonoid aglycone from Scutellaria baicalensis based on infrared-assisted enzymatic hydrolysis technology
InactiveCN107837299AEasy to operateFully enzymaticallyPlant ingredientsChemistryEnzymatic hydrolysis
The invention relates to a method for extracting total flavonoid aglycone from Scutellaria baicalensis based on infrared-assisted enzymatic hydrolysis technology, belonging to the field of analyticalchemistry. The method comprises the following steps: selecting the medicinal powder of Scutellaria baicalensis, and carrying out infrared-assisted enzymatic hydrolysis at first, i.e., adding water ora buffer solution with a certain pH value as an enzymatic hydrolysis solution, subjecting the medicinal powder of Scutellaria baicalensis to infrared radiation with a certain power at a certain temperature for a certain period of time, and then adding an organic solvent for infrared-assisted extraction; and then subjecting the obtained extract to filtering at first and then to detection and analysis with a high-peformance liquid chromatograph. The infrared-assisted enzymatic hydrolysis technology provided by the invention is sufficient in enzymatic hydrolysis, fast in speed, high in efficiency, safe, friendly to environment, and beneficial for extraction of the total flavonoid aglycone of Scutellaria baicalensis in the medicinal material Scutellaria baicalensis; and the method is of greatsignificance to development and utilization of the medicinal material Scutellaria baicalensis and to preparation of the total flavonoid aglycone of Scutellaria baicalensis.
Owner:FUDAN UNIV
A kind of method utilizing lipase to prepare chitosan oligosaccharide
Provided is a method for preparing chitosan oligosaccharide by using a lipase. The method comprises dissolving chitosan in an acetic acid-sodium acetate buffer solution and adding sucrose fatty acid ester to prepare a chitosan solution, adding a lipase to the chitosan solution for enzymatic hydrolysis, dialyzing an enzymatic hydrolysate after the enzymatic hydrolysis, and concentrating the resulting dialysate and drying.
Owner:GUANGDONG PHARMA UNIV
Production method of novel dietary fiber solid beverage
PendingCN112120137AGood network space structurePromote recoveryFood shapingFood ingredient functionsBiotechnologyMicrobiology
The invention relates to the technical field of production of processed foods, and particularly discloses a production method of a novel dietary fiber solid beverage. The production method comprises the following steps: preparing black fungus solid raw material ultrafine powder with the fineness of 500-1000 meshes and the dissolution amount of soluble polysaccharide of 3-6%; preparing microcapsuleembedded dry mulberry fruit powder, wherein the process of preparing the microcapsule embedded dry mulberry fruit powder comprises the following steps: preparing mulberry raw stock, performing embedding, and performing centrifugal spray drying; and preparing the dietary fiber solid beverage of which the main materials comprise the black fungus solid raw material ultrafine powder, the microcapsuleembedded dried mulberry fruit powder and konjac fine powder. According to the invention, black funguses and mulberries are respectively treated by utilizing an airflow superfine grinding technology and a microcapsule embedding spray drying technology, so that the novel dietary fiber solid beverage has the advantages of simple process, lower cost, good eating mouth feel, rich flavor, good visual effect, rich dietary fibers, strong edibility and the like.
Owner:浙江大学湖州市南太湖现代农业科技推广中心
Beta-agarose, and application thereof in quantitative detection of agar
ActiveCN111004791AGood enzymatic propertiesImprove stabilityMicrobiological testing/measurementBiological material analysisAgaraseAmino acid
The invention relates to the technical field of biotechnology and biochemical detection, and especially relates to a beta-agarose, and anapplication thereof in quantitative detection of agar. The enzyme has a novel amino acid sequence and good enzymatic properties, and the amino acid sequence of the enzyme is represented by SEQ ID NO. 1. The invention discloses a kit for detecting the agar contentby using beta-agarose Aga16_WA. The kit comprises a reagent A, a reagent B, a reagent C and a calibrator, wherein the reagent A comprises the beta-agarose Aga16_WA and a stabilizer. The kit is good in linear range and high in accuracy, and can be promoted and used in the market.
Owner:OCEAN UNIV OF CHINA
Cascade enzyme reactor for enzymatically digesting DNA into mononucleoside
InactiveCN106399089AImprove permeabilityImprove mechanical propertiesEnzyme production/based bioreactorsEnzyme digestionFiltration
The invention relates to a cascade enzyme reactor for enzymatically digesting DNA into mononucleoside. The cascade enzyme reactor is characterized by being formed by serially connecting more than two DNA single enzyme reactors, and genome DNA, by virtue of the reactor, can be enzymatically hydrolyzed into the mononucleoside. The cascade DNA enzyme reactor is rich in porous structure and excellent in mechanical performance, and a DNA sample, which is injected into the enzyme reactor by virtue of a low-voltage micro-injection pump, a hand-push pump and the like, is enzymatically hydrolyzed. The cascade DNA enzyme reactor, which enzymatically hydrolyzes the genome DNA into the mononucleoside, is quite high in enzyme digestion efficiency which can reach 99.0% or above; and the cascade DNA enzyme reactor, which is high in enzyme digestion speed, can shorten an enzyme digestion time to be less than 1h. The cascade DNA enzyme reactor, which is excellent in stability, can be repeatedly used for more than 30 times and can be preserved for more than 2 months. Without the assistance of a thermal denaturating or ultra-filtration enzyme, the sample, which is enzymatically hydrolyzed by virtue of the cascade enzyme reactor, can directly enter a mass spectrum for the qualitative or quantitative analysis of a target nucleoside product; and the sample is applicable to DNA adduct analysis under the exposure of environmental pollutants.
Owner:RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
Method for quantitatively detecting kappa-carrageenan by enzymic method
ActiveCN111100904AImprove linear rangeImprove accuracyMicrobiological testing/measurementColor/spectral properties measurementsBiotechnologyCarrageenan
The invention relates to the technical field of biotechnology and biochemical detection, in particular to a method for quantitatively detecting kappa-carrageenan by an enzymic method. The method comprises the following steps: specifically hydrolyzing the kappa-carrageenan into reducing sugar by utilizing kappa-carrageenase; after enzyme inactivation, adding a p-hydroxybenzohydrazide solution for achromogenic reaction; after centrifugation, measuring a light absorption value of supernate at the position of 400-420 nm; and the comparing the light absorption value to a standard curve to obtain the content of the kappa-carrageenan. The detection method is good in linear range and high in accuracy, and can be popularized and used in the markets.
Owner:OCEAN UNIV OF CHINA
Method for quantitatively detecting iota-carrageenan by enzymatic method
ActiveCN111100903AImprove linear rangeImprove accuracyComponent separationMicrobiological testing/measurementBiotechnologyCarrageenan
The invention relates to the technical field of biotechnology and biochemical detection, and in particular to a method for quantitatively detecting iota-carrageenan by an enzymatic method. According to the method, iota-carrageenan is degraded into reducing sugar by utilizing specificity of an iota-carrageenan enzyme; a p-hydroxybenzoylhydrazine solution is added for a color reaction after the enzyme is inactivated; centrifuging is carried out, and then the light absorption value of the supernatant is measured at 400-420nm; and the iota-carrageenan content is obtained by comparing the light absorption value with a standard curve. The detection method disclosed by the invention has the advantages of good linear range and high accuracy, and can be popularized and used in the market.
Owner:OCEAN UNIV OF CHINA
Preparation method and application of vitamin A and D extract in internal organs of pacific mackerel
The invention provides a preparation method of a vitamin A and D extract in internal organs of pacific mackerel. The method comprises the following steps: 1) pretreatment; 2) enzymolysis; 3) extraction; and 4) purification. The method has the beneficial effects that complex enzymes carry out enzymatic hydrolysis in a combined way, and are activated by multiple enzyme activators, and the enzymatic hydrolysis speed is high and the enzymatic hydrolysis is more complete; microwaves help dissolution, and the dissolution rate of vitamin A and D is increased; the protein is removed by a mixed liquid of chloroform and ethanol, grease is removed by ethanol redissolution and purification, and the finally obtained vitamin A and D extract has a high extraction rate, high purity, and strong activity; the operation is simple, the cost is low, the economic value is high, and the prepared vitamin A and D extract can be used for preparing health care products or drugs or food.
Owner:ZHEJIANG OCEAN UNIV
Method for preparing chitosan oligosaccharide by using lipase
The invention belongs to the technical field of oligosaccharide preparation, and particularly relates to a method for preparing chitosan oligosaccharide by using lipase. The method for preparing the chitosan oligosaccharide by using the lipase comprises the steps that chitosan is dissolved in an acetic acid-sodium acetate buffer solution and sucrose fatty acid ester is added so as to prepare a chitosan solution, lipase liquid is added into the chitosan solution for enzymatic hydrolysis, an enzymatic hydrolysate is dialyzed after the enzymatic hydrolysis is completed, and the obtained dialysateis concentrated and then dried. The method for preparing the chitosan oligosaccharide by using the lipase is easy and rapid to operate, the required preparation time is short, and the obtained degradation product, namely the chitosan oligosaccharide has a high yield, uniform distribution of molecular weight and consistent color formation.
Owner:GUANGDONG PHARMA UNIV
Walnut endosperm protein beverage and preparation method thereof
The invention belongs to the technical field of food processing, and particularly relates to a walnut endosperm protein beverage and a preparation method thereof. The walnut kernels, walnut seed coatsand walnut shells are extracted respectively, all parts of walnuts are fully utilized, and the additional cost of a factory is reduced. The walnut kernels are subjected to enzymolysis, refining and other treatment, endosperm protein of the walnut kernels is decomposed into polypeptide small molecules and used for making walnut beverages, and protein in walnuts is reserved in the beverages to themaximum extent; the walnut shells and the walnut seed coats are respectively extracted to prepare the walnut essential oil and an antioxidant, so that the nutritional ingredients of the walnut beverage are further enriched, and the shelf life of the beverage can be prolonged under the condition of not adding preservatives.
Owner:黔西南州蒂辉生物科技有限公司
Enzymatic hydrolysis of proteins and glycoproteins
ActiveCN108410932BSimple and fast operationConvenient for field workFermentationEnzymatic hydrolysisGlycopeptide
The invention discloses an enzymatic hydrolysis method of protein and glycoprotein. The enzymatic hydrolysis method of protein or glycoprotein disclosed in the invention comprises: incubating the protein or glycoprotein and protease in a reaction system for 0.5-15 minutes to complete the enzymatic hydrolysis of the protein or glycoprotein; the reaction system contains NH 4 HCO 3 , NH in the reaction system 4 HCO 3 The concentration of the protein is greater than 0mM and less than or equal to 100mM; the mass ratio of protein or glycoprotein to protease in the reaction system is 1:(0.0001-3); the incubation time is 0.5-10 minutes, and the temperature is 4-80°C. The method of the present invention can be applied to fields that require protein enzymatic hydrolysis: such as identification of proteins, obtaining specific glycopeptides, identifying peptide segments with mutated amino acids, and the like.
Owner:张怀远
A kind of β-agarase and its application in agar quantitative detection
ActiveCN111004791BGood enzymatic propertiesImprove stabilityMicrobiological testing/measurementBiological material analysisBiotechnologyAgarase
The invention relates to the technical field of biotechnology and biochemical detection, in particular to a β-agarase and its application in agar quantitative detection. The enzyme has a novel amino acid sequence and good enzymatic properties, and its amino acid sequence is SEQ ID NO.1. The present invention develops a kit for detecting agar content by using β-agarase Aga16_WA: including reagent A, reagent B, reagent C and calibrator, wherein reagent A contains β-agarase Aga16_WA and a stabilizer. The kit has good linear range and high accuracy, and can be popularized and used in the market.
Owner:OCEAN UNIV OF CHINA
Resourceful processing treatment method for mangoes
PendingCN114747743AEasy to relaxEasy to break awayFruit and vegetables preservationNatural extract food ingredientsCrude fibreFiber
The method comprises the following steps: S1, ripening mango raw materials, crushing, pulping, and separating to obtain a mixture of mango juice, mango pulp, mango peel and mango kernels; separating the peel and kernel mixture to obtain mango peel; finely filtering and separating crude fibers in the mango juice pulp, and then homogenizing the mango juice pulp for later use; s2, mixing mango peel, crude fiber and water, crushing into pulp, adding a compound enzyme preparation, introducing ethylene, and performing enzymolysis under an ultrasonic condition; carrying out enzyme deactivation on the peel pulp subjected to enzymolysis, and carrying out vacuum flash evaporation and aroma enhancement to obtain natural aroma recovery liquid of the mango peel; and S3, mixing the natural aroma recovery liquid of the mango peel with the mango juice pulp under a vacuum condition, then emulsifying, adjusting the acidity and sugar degree, and finally performing ultrahigh pressure sterilization to obtain the mango pulp. Fragrance components in the mango peel are extracted by adopting an enzymolysis method and are mixed with the mango juice pulp, so that the frozen mango pulp which is pure and fine in taste, rich in fragrance and excellent in quality can be produced.
Owner:广西和谊食品有限公司
Preparation method of pig blood fibrin polypeptide powder
ActiveCN102125164BHigh in peptidesSmall molecular weightAnimal feeding stuffProtease preparationAdditive ingredient
Owner:成都天屹生物科技有限公司
Method for preparing oligogalactomannose enzymatic hydrolysis solution from guar gum solution
The invention discloses a method for preparing galactomannose oligosaccharide enzymatic hydrolysis solution from a guar gum solution. First, a citric acid-sodium citrate buffer solution is used to prepare a guar gum solution, then the temperature and time are controlled for heating and swelling, and after cooling, the guar gum solution is prepared. At the same time, three enzymes, β-mannanase, xylanase, and endoglucanase, were added, mixed thoroughly, and the enzymatic hydrolysis temperature and time were controlled for degradation. The invention realizes the rapid enzymatic hydrolysis of guar gum under high concentration, obtains the galactomannose oligosaccharide enzymatic hydrolysis solution, and saves the cost of drying and purification in the subsequent production of galactomannose oligosaccharide.
Owner:QINGZHOU RONMER BIOLOGY TECH CO LTD
Method for quickly preparing galactomannose hydrolyzate by using guar gum
The invention discloses a method for rapidly preparing an enzymatic hydrolysis solution of oligogalactomannose by using guar gum. Firstly, a guar gum solution is prepared with a citric acid-sodium citrate buffer solution, and then the temperature and time are controlled to heat and swell, and then cooled. Finally, add β-mannanase, xylanase, and cellulase at the same time, mix well, and control the enzymatic hydrolysis temperature and time for degradation. The invention realizes the rapid enzymolysis of guar gum at high concentration, obtains the enzymatic hydrolysis solution of galactomannose oligosaccharides, and saves the cost of drying and purification during the subsequent production of galactomannose oligosaccharides.
Owner:临沂小鲁生物科技有限公司
A high-efficiency extraction of heparin natrase membrane-coupled enzymatic hydrolysis device
ActiveCN105886397BNo pollution in the processFast enzymatic hydrolysisBioreactor/fermenter combinationsBiological substance pretreatmentsTemperature controlProteinase activity
The invention discloses an enzyme membrane coupled enzymolysis device for efficiently extracting heparin sodium. The enzyme membrane coupled enzymolysis device comprises a loading box, an operation box I, an operation box II and a collection box, wherein a centrifugal machine is arranged at the upper end of the loading box, the loading box, the operation box I, the operation box II and the collection box are sequentially connected by virtue of transmission pipes from left to right, a pH controller is arranged inside the operation box I, a protease container and a sterilizer are arranged at the upper end of the operation box II, the protease container and the sterilizer are connected by virtue of a transmission pipe, a high temperature steam engine is arranged inside the operation box II, a vacuum pump is arranged inside the collection box, a temperature controller is arranged at the upper end of the collection box, heparin sodium is obtained and transmitted to the interior of the collection box, the temperature controller is utilized for controlling temperature of the collection box, the vacuum pump is used for pumping the air, an appropriate environment is constructed for extraction of heparin sodium, and design is novel, so that the enzyme membrane coupled enzymolysis device is worthy of popularization.
Owner:南通欣宇光肠衣有限公司
Preparation method of sinonovacula constricta anti-hypertension peptide
InactiveCN106636279ADoes not destroy activityHigh activityPeptide preparation methodsFermentationSolubilityUltrafiltration
The invention provides a preparation method of a sinonovacula constricta anti-hypertension peptide. The method comprises the following operation steps: (1) enzymolysis; (2) ultrafiltration; and (3) preparation of the sinonovacula constricta anti-hypertension peptide. The method has the following beneficial effects: sinonovacula constricta is subjected to enzymolysis by adopting a complex enzyme preparation, so that the anti-hypertension peptide can be obtained, the activity of the anti-hypertension peptide is not destroyed, the degradation speed is high and the reaction time is shortened; the solubility of the anti-hypertension peptide in a Tris-HCl buffer solution can be improved by adding a cosolvent and the extraction rate of the anti-hypertension peptide is improved; a hydration film around molecules of the anti-hypertension peptide can be weakened or disappear by a precipitation agent and the precipitation rate is high; the content of precipitated impure protein and polypeptide is low; the prepared sinonovacula constricta anti-hypertension peptide is high in purity, high in activity and good in anti-hypertension effect; and the sinonovacula constricta anti-hypertension peptide prepared by using an enzymolysis technology is green and safe and can be securely used for production of anti-hypertension drugs.
Owner:ZHEJIANG OCEAN UNIV
Protein collection and enzymolysis integrated sample pretreatment apparatus and its production
InactiveCN101470052BRealize the collectionRapid enzymatic digestionOn/in organic carrierEnzymatic hydrolysisBiology
The invention relates to a sample pretreatment device for improving protein analysis speed, which combines protein collection and enzymatic hydrolysis functions. The invention relates to a preparation method thereof. The sample pretreatment device comprises a centrifuge tube with an upper cover, which is characterized in that the middle part of the upper cover of the centrifugal tube is provided with a hole, the inner wall of the centrifugal tube is attached with an annular hollow porous rigid integral substrate layer whose surface is fixed with enzymes via active groups modifying the substrate. The sample pretreatment device has the advantages of large sample processing amount, fast protein enzymatic hydrolysis speed, simple manufacture method and low cost, which can be used for fast enzymatic hydrolysis of collected protein samples. The invention has high practical value for the research of high flux protein.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
A preparation method of dipeptidyl peptidase-iv inhibitory peptide derived from Japanese yellow croaker swim bladder collagen
ActiveCN109295140BGood dispersionOptimal enzymatic hydrolysis levelFermentationAcetic acidDipeptidyl peptidase
The invention relates to the technical field of protein extraction. In order to solve the problems of a large number of by-products and low resource utilization in the processing of Japanese croaker, a dipeptidyl peptidase-IV inhibitory peptide derived from collagen in the swim bladder of Japanese croaker is provided. The preparation method comprises the following steps: (1) pretreating the swim bladder of Japanese yellow croaker, then extracting collagen with 5wt% acetic acid combined with pepsin, and centrifugally drying to obtain the swim bladder collagen of Japanese yellow croaker; (2) using compound The enzymatic hydrolysis of the Japanese croaker swim bladder collagen obtained in step (1) to obtain the Japanese croaker swim bladder collagen peptide; (3) combining the Japanese croaker swim bladder collagen peptide with a dipeptidyl peptidase screening kit, namely Obtain dipeptidyl peptidase-IV inhibitory peptide. In the present invention, the dipeptidyl peptidase-IV inhibitory peptide is prepared by using the swim bladder of Japanese yellow croaker as the main raw material through a relatively efficient process. antihyperglycemic effect.
Owner:ZHEJIANG OCEAN UNIV
Kelp microcrystalline cellulose and preparation method thereof as well as application of prepared kelp microcrystalline cellulose
The invention discloses kelp microcrystalline cellulose and a preparation method thereof as well as application of the prepared microcrystalline cellulose. The preparation method of the kelp microcrystalline cellulose comprises the following steps of by adopting waste kelp residues after kelp glue-extracting as the materials, carrying out flocculation collecting, acidification decalcification, alkaline treatment, bleaching treatment, washing, drying and hydrolytic treatment, wherein in the hydrolytic treatment, two different low-temperature cellulases are respectively added according to the addition of 20U / g-30U / g; carrying out enzymolysis for 0.5-12 hours in a water bath of 10 DEG C-40 DEG C; and drying and crushing to obtain the kelp microcrystalline cellulose. According to the preparation method of the kelp microcrystalline cellulose, the production cost is low, the environment pollution is small, the hydrolysis step adopts a double-enzyme jointed enzymolysis technology, the degradation speed is stable, the degraded cellulose is uniform in molecular weight, the cellulose crystalline grains are small and uniform, degradability of the fibers can be effectively controlled, and the microcrystalline cellulose with high purity and high activity is obtained. The kelp microcrystalline cellulose disclosed by the invention is high in cellulose content, high in water holding capacity and expansion force, and can be used for food additive and pharmaceutical adjuvant in the food industry.
Owner:QINGDAO HENGSHENG BIOLOGICAL PHARMA TECH DEV
Preservative and fresh-keeping method of soy sauce
PendingCN114403418AKeep the flavorImprove anti-corrosion performanceFood preservationFood ingredient for microbe protectionBiotechnologyAmylase
The invention provides a preservative and fresh-keeping method of soy sauce. The preservative and fresh-keeping method comprises the following steps: mixing raw materials with aspergillus oryzae to prepare koji, so as to obtain finished koji; mixing the finished koji with saline water to prepare soy sauce mash; performing early-stage fermentation on the soy sauce mash to obtain a fermentation product; continuously fermenting the fermentation product to obtain soy sauce; wherein the fermentation temperature of the early-stage fermentation is 40-60 DEG C, and the fermentation days are less than or equal to 50 days. High-temperature fermentation of 40-60 DEG C is adopted during early-stage fermentation, various enzymes such as protease and amylase in finished soy sauce koji are promoted to play an enzymolysis role under more suitable conditions, so that rapid enzymolysis of macromolecular substances such as protein and starch in the early-stage fermentation is realized, and meanwhile, proliferation of microorganisms is inhibited at high temperature; therefore, the preservative property of the soy sauce is improved while the flavor of the soy sauce is maintained under the condition that no preservative is added.
Owner:烟台欣和企业食品有限公司
A kind of preparation method of L-methionine
ActiveCN103420882BReduce lossesNo lossOrganic compound preparationSulfide preparationOrganic solventDistillation
Owner:NINGXIA UNISPLENDOUR TIANHUA METHIONINE CO LTD
Method for refining sheep tail oil by using biological enzyme method
PendingCN113502187AImprove qualityImprove oil yieldComponent separationFatty-oils/fats refiningBiotechnologyMeat paste
The invention relates to a method for refining sheep tail oil by a biological enzyme method. The method comprises the steps of (1) pretreating raw materials; (2) preparing trypsin solutions with different concentrations by using a phosphate buffer solution; (3) mixing the pretreated sheep tail meat paste with a buffer solution according to different solid-liquid ratios, and adding the trypsin solution; (4) carrying out heat preservation and enzymolysis in a constant-temperature water bath oscillator for several hours, then carrying out high-temperature enzyme deactivation, and centrifuging to obtain a separated oil phase; and (5) determining the quality of the extracted sheep tail oil. The method provided by the invention avoids the problems of easy discoloration, easy deterioration and incomplete extraction caused by the traditional baking method for extracting the sheep tail oil, and is a method which is simple to operate, low in cost, high in oil yield and high in quality of the extracted sheep tail oil.
Owner:满洲里双实肉类食品有限公司 +1
Preparation method of phosphorylated peptidoglycan
ActiveCN103397060BImprove permeabilityPromote the performance of enzymatic hydrolysisMicroorganism based processesFermentationSolubilityPhosphate
The invention discloses a preparation method of phosphorylated peptidoglycan. The method is characterized by comprising the following steps of: inoculating Lactobacillus acidophilus on a culture medium for cultivation, centrifuging to collect thallus, repeatedly washing the thallus, suspending the thallus in hydrofluoric acid solution for one night at 4 DEG C, centrifugally collecting cell wall sediment, and washing the sediment to become neutral; dissolving the sediment into Trypsin chymotrypsin phosphate buffer solution, inactivating in boiling water, centrifuging the liquid supernatant, washing the sediment; dissolving the sediment in diethyl ether, stirring and centrifuging to collect sediment, and washing the sediment with water until completely removing the smell of diethyl ether, then obtaining the peptidoglycan; dissolving the peptidoglycan in Lysostaphin phosphate buffer solution for performing enzymolysis and centrifuging, taking the liquid supernatant, centrifuging the liquid supernatant, and centrifugally washing the sediment with water to get micromolecule peptidoglycan; and finally, dissolving the micromolecule peptidoglycan in mixed phosphate solution, precipitating with alcohol after reaction, treating the alcohol precipitated peptidoglycan by freeze drying and redissolving, and adding the redissolved solution in a dialysis bag, performing dialysis concentration, and then, performing freeze drying to get the phosphorylated peptidoglycan. The method has the advantages of increasing the solubility remarkably and improving the immunological effect to a certain extent.
Owner:NINGBO UNIV
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