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34results about How to "Mild degradation conditions" patented technology
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Strain for generating keratinase and application thereof
InactiveCN101580807AExtended biodegradable rangeMild degradation conditionsBacteriaHydrolasesBiotechnologyStenotrophomonas maltophilia
The invention relates to a strain for generating keratinase and an application thereof. The strain is Stenotrophomonas maltophilia) DHHJ CGMCC No.2231 applied to the degradation of soft keratin, such as chicken feathers, pigeon feathers, cow hair, wool, hair and hard keratin, such as ox horns, goat horns, sheep hoofs and nail waste. Compared with other strains for degrading the keratin, the strain has mild fermentation conditions, is convenient to apply and can generate the keratinase with higher enzymatic activity and stability.
Owner:DONGHUA UNIV
Method for degrading heparan sulfate and detecting heparan sulfate disaccharide composition
ActiveCN103713057AMild degradation conditionsLow costSugar derivativesComponent separationChemistryMass spectrometry
The invention belongs to the field of medicine, and relates to a method for degrading heparan sulfate and detecting heparan sulfate disaccharide composition. The method comprises the following steps of (1) degrading heparan sulfate into disaccharide by utilizing a chemical degradation method; (2) deriving the heparan sulfate disaccharide by utilizing a derivation reagent; (3) detecting the derived heparan sulfate disaccharide obtained in the step (2) by utilizing the liquid chromatography (LC) or liquid chromatography-mass spectrography (LC-MS) method. The heparan sulfate can be completely degraded into the disaccharide through the two chemical degradation methods, so that the structural information of the heparan sulfate disaccharide can be maximally obtained. The degradation condition is moderate, the cost is low, simplicity in operation can be realized, the requirement on the experimental instruments is low, the application range is wide, the detection time is short, the consumption of samples is small, the sensitivity is high, and the repeatability of the analysis result is good.
Owner:OCEAN UNIV OF CHINA
Preparation method of high-purity birnessite type manganese oxide capable of efficiently degrading organic dyes
InactiveCN107021525ANo pollution in the processRaw materials are cheap and easy to getWater contaminantsManganese oxides/hydroxidesOrganic dyePersulfate
The present invention discloses a preparation method of high-purity birnessite capable of efficiently degrading organic dyes and having a three-dimensional micro-flower structure. According to the preparation method, a soluble manganese salt is adopted as a manganese source, a proper amount of a complexing agent is added to the manganese salt solution, and the high-purity birnessite having the three-dimensional micro-flower structure is obtained under an alkaline condition by using an air oxidation method. According to the present invention, the experiment results of the degradation of organic dyes such as methylene blue (MB), methyl orange (MO) and Rhodamine B (RhB) with the prepared birnessite show that the organic dyes can be efficiently degraded under the acidic condition in the absence of any oxidizing agents such as hydrogen peroxide and persulfate without any auxiliary equipment such as ultrasound, microwave and the like; the preparation method has characteristics of cheap and easily available raw material, simple preparation process, time saving, and labor saving; and the prepared product can degrade the organic dyes under the simple condition, can provide the significant effect, and can achieve the treatment on the industrial organic dye pollution.
Owner:HUNAN UNIV
Method for extracting and purifying anthocyanin from bilberry
InactiveCN106632204AImpede structural changeProtective structureOrganic chemistryNatural dyesBULK ACTIVE INGREDIENTMacroporous resin
The invention provides a method for extracting and purifying anthocyanin from bilberry. The method comprises the following steps: (1) microbial degradation; (2) obtainment of a crude extract of bilberry anthocyanin by utilizing a water extraction process; (3) addition of a certain amount of a flocculant for impurity removal; (4) impurity removal and purification with macroporous resin; (5) concentration; and (6) spray drying. According to the invention, by combining aqueous-solution extraction and microbial degradation, an acylated stable structure of anthocyanin is realized through microbial degradation; in addition, the juice yield of bilberry is greatly improved through cellulase hydrolysis; thus, double purposes are achieved through one way, and interdisciplinary penetration and effective combination of biological science and chemical production are realized. The method provided by the invention also utilizes ZTC1 + 1 for flocculation and impurity removal, and solves the problems of easy loss of active ingredients and long production cycle in traditional water extraction and alcohol precipitation. The extraction method provided by the invention has the advantages of simple process operation, low production cost, no pollution, high extraction rate, and no damage to anthocyanin due to high temperature; and the anthocyanin prepared by using the method provided by the invention can be extensively applied to fields like food, health-care products and cosmetics, and has extremely high application values.
Owner:宁波中药制药股份有限公司
Preparation method of degradable primary amine curing agents
ActiveCN103435504ALow costShorten the production cycleOrganic compound preparationAmino-hyroxy compound preparationEpoxyFiber-reinforced composite
The invention provides a preparation method of four degradable primary amine curing agents. The preparation method comprises the following steps: reacting raw materials with ammonia or ammonia water to generate primary amine curing agents, carrying out a Gabriel reaction of the raw materials to generate o-dicarboximide or phthalimide group-containing compounds, hydrolyzing or hydrazinolyzing the compounds to obtain crude products, and purifying and refining the crude products to obtain the primary amine curing agents. Epoxy resins and fiber reinforced composite materials prepared through using the primary amine curing agents obtained in the invention have a good degradation performance, are friendly to environment, and are environmentally friendly materials.
Owner:ADESSO ADVANCED MATERIALS WUXI CO LTD
Method for preparing monophenol compound through catalyzing degradation of lignin by using ammino-complex
ActiveCN106946660AImprove degradation rateIncrease contact pointsOrganic compound preparationOrganic-compounds/hydrides/coordination-complexes catalystsFiltrationHigh pressure
The invention discloses a method for preparing a monophenol compound through catalyzing degradation of lignin by using an ammino-complex. The method comprises the steps: adding the lignin, a metal salt, ammonia water, a peroxidant, an alkali and deionized water into a high-pressure reaction vessel, and carrying out stirring to form a uniform solution; carrying out a reaction for 100 to 240 minutes at the temperature of 120 DEG C to 180 DEG C, and carrying out cooling; and adjusting the pH value of a reaction solution to 2 to 3 with an acid, then, carrying out a reaction for 10 to 20 minutes at the temperature of 100 DEG C to 120 DEG C, carrying out cooling, then, carrying out filtration to collect filtrate, carrying out extraction on the filtrate with dichloromethane, separating an organic phase, and carrying out drying with anhydrous calcium chloride, thereby obtaining a monophenol compound mixed solution. According to the method, a stable ammino-complex solution is formed by using the metal salt and the ammonia water under alkaline conditions, so that the number of sites of contact between a catalyst and the lignin can be effectively increased compared with that in the conventional lignin oxidative degradation method; the degradation of the lignin can be efficiently catalyzed in an aqueous solution under moderate reaction conditions; and the method has the characteristics of high efficiency and low cost and is applicable to large-scale industrial production.
Owner:GUANGXI ACAD OF SCI
Preparation method of high-FXa-resistant low-FIIa-resistant low-molecular heparin sodium
The invention provides a preparation method of high-FXa-resistant low-FIIa-resistant low-molecular heparin sodium. Common heparin is subjected to beta- elimination degradation in an organic solvent to reduce the falling of sulfonic groups from heparin, so that the preparation method has the advantages of mild degradation conditions and high anticoagulating activity of the product. The FXa-resistant titer of the low-molecular heparin sodium is 120-160IU / mg, the FIIa-resistant titer is 10-30IU / mg, and the average molecular weight is 3500-5000Da.
Owner:王芃
Electrodegradation recovery method of carbon fiber reinforced composite material
InactiveCN111995796ARealize resource reuseImprove solubilityElectrolysis componentsPlastic recyclingEpoxyOrganic solvent
The invention discloses an electrodegradation recovery method of a carbon fiber reinforced composite material. According to the invention, electrocatalytic oxidation is adopted to oxidize thermosetting resin into a low-molecular-weight thermoplastic polymer and quickly dissolve the low-molecular-weight thermoplastic polymer in a mixed solvent, thereby separating and recovering carbon fibers and implementing resource reutilization. The conductivity of the mixed solvent and the solubility of the high-molecular polymer are good, so the catalytic oxidation efficiency of the fiber reinforced material can be obviously improved, a fiber recovery rate can reach 95% or above, and the thermosetting cross-linked epoxy resin is electrocatalytically oxidized and degraded into the low-molecular-weight thermoplastic polymer which is then dissolved in the mixed solvent, so separation and recycling are realized; and after electrocatalytic oxidation, water and the organic solvent can be directly distilled and recovered from electrodegradation liquid, and the electrodegradation liquid recovered through reduced-pressure distillation and washing liquid are mixed to serve as the electrodegradation liquid to be reused. The electrodegradation recovery method has the advantages of mild degradation conditions, simple process operation, no corrosion, a small amount of three wastes, environmental optimization and the like.
Owner:ADESSO ADVANCED MATERIALS WUXI CO LTD
Lentinan oligosaccharide having excellent anti-oxidation activity, and preparation method thereof
ActiveCN108265092AImproves antioxidant activityMild degradation conditionsFermentationFood ingredient functionsWater bathsOligosaccharide
The invention discloses a lentinan oligosaccharide having an excellent anti-oxidation activity, and a preparation method thereof. The method comprises the following steps: (1) mixing lentinan with distilled water, adding beta-mannanase, adjusting the pH value of the obtained solution to 5-7, performing stirring reacting boiling in 40-60 DEG C constant-temperature water bath for 13-17 min, stoppingthe reaction, filtering the obtained reaction solution, concentrating the obtained filtrate, dialyzing the obtained concentrate to remove undegraded macromolecular lentinan, and concentrating and lyophilizing the obtained dialysate to obtain crude lentinan oligosaccharides; (2) taking the crude lentinan oligosaccharides in proportion, dissolving the crude lentinan oligosaccharides in distilled water, adding an ethanol-water solution to perform alcohol precipitation, centrifuging the precipitated solution, and concentrating and lyophilizing the obtained supernatant; and (3) separating and purifying the obtained lyophilized product through a Sephadex G-15 column. The lentinan oligosaccharides are degraded through adopting an enzymatic hydrolysis technology, and degradation conditions are mild. The preparation process is simple, and the yield is high. The prepared oligosaccharide has excellent anti-oxidation activity, and can be used in healthcare products, foods and drugs, and anti-oxidation additives thereof.
Owner:TIANJIN UNIV
Preparation method of bamboo liquid-collagen polypeptide composite adhesive
ActiveCN109517580AHighlight substantiveSignificant progressProtein adhesivesLignocellulosic adhesivesAdhesivePlasticizer
The invention discloses a preparation method of a bamboo liquid-collagen polypeptide composite adhesive. The preparation method comprises the following steps of: step (1). putting bamboo powder into alkali liquor in a reaction kettle, and performing primary alkali thermal degradation reaction to obtain bamboo liquid; step (2). adding leather meal to the bamboo liquid in the reaction kettle, and performing secondary alkali thermal degradation reaction on the leather meal to obtain bamboo liquid-collagen mixed degradation liquid; step (3). performing mechanical filter pressing on the bamboo liquid-collagen mixed degradation liquid to collect filtrate; and step (4). adjusting the pH of the filtrate, adding a crosslinking agent and a plasticizer, stirring and reacting to obtain the bamboo liquid-collagen polypeptide composite adhesive. The preparation method of the bamboo liquid-collagen polypeptide composite adhesive utilizes biomass resources and has low production cost.
Owner:NINGBO UNIVERSITY OF TECHNOLOGY
A method for preparing monophenolic compounds by catalyzing lignin degradation with ammonia complexes
ActiveCN106946660BImprove degradation rateIncrease contact pointsOrganic compound preparationOrganic-compounds/hydrides/coordination-complexes catalystsLignin degradationChloride
The invention discloses a method for preparing a monophenol compound through catalyzing degradation of lignin by using an ammino-complex. The method comprises the steps: adding the lignin, a metal salt, ammonia water, a peroxidant, an alkali and deionized water into a high-pressure reaction vessel, and carrying out stirring to form a uniform solution; carrying out a reaction for 100 to 240 minutes at the temperature of 120 DEG C to 180 DEG C, and carrying out cooling; and adjusting the pH value of a reaction solution to 2 to 3 with an acid, then, carrying out a reaction for 10 to 20 minutes at the temperature of 100 DEG C to 120 DEG C, carrying out cooling, then, carrying out filtration to collect filtrate, carrying out extraction on the filtrate with dichloromethane, separating an organic phase, and carrying out drying with anhydrous calcium chloride, thereby obtaining a monophenol compound mixed solution. According to the method, a stable ammino-complex solution is formed by using the metal salt and the ammonia water under alkaline conditions, so that the number of sites of contact between a catalyst and the lignin can be effectively increased compared with that in the conventional lignin oxidative degradation method; the degradation of the lignin can be efficiently catalyzed in an aqueous solution under moderate reaction conditions; and the method has the characteristics of high efficiency and low cost and is applicable to large-scale industrial production.
Owner:GUANGXI ACAD OF SCI
Preparation method of degradable high-performance fiber reinforced epoxy resin-based composite material
ActiveCN113980305AIncrease lifting powerImprove thermal efficiencyPlastic recyclingResin matrixFirming agent
The invention provides a preparation method of a degradable high-performance fiber reinforced epoxy resin-based composite material, and belongs to the technical field of high-performance fiber reinforced epoxy resin-based composite materials. The degradable high-performance fiber reinforced epoxy resin-based composite material is prepared by mixing epoxy resin with three or more oxygen-containing functional groups, a curing agent at least comprising one anhydride and a long fiber reinforcement, curing, performing hot press molding and cooling. The organic matter participating in preparation of the resin matrix has an ortho-position group effect, so that the resin network can be topologically rearranged under a mild condition. The fiber reinforced epoxy resin-based composite material can be completely degraded on the basis of ensuring that the mechanical and thermal properties of the fiber reinforced epoxy resin-based composite material are equivalent to those of a traditional epoxy resin-based composite material, and the recycled long fiber reinforcement is consistent with the original fiber in performance and structure. The fiber reinforced epoxy resin-based composite material prepared by the method effectively saves a large amount of fiber resources, and has practical application value under the concept of sustainable development.
Owner:BEIJING UNIV OF CHEM TECH
A preparation method of high-purity birnessite-type manganese oxide that efficiently degrades organic dyes
InactiveCN107021525BNo pollution in the processRaw materials are cheap and easy to getWater contaminantsManganese oxides/hydroxidesPersulfateOrganic dye
The present invention discloses a preparation method of high-purity birnessite capable of efficiently degrading organic dyes and having a three-dimensional micro-flower structure. According to the preparation method, a soluble manganese salt is adopted as a manganese source, a proper amount of a complexing agent is added to the manganese salt solution, and the high-purity birnessite having the three-dimensional micro-flower structure is obtained under an alkaline condition by using an air oxidation method. According to the present invention, the experiment results of the degradation of organic dyes such as methylene blue (MB), methyl orange (MO) and Rhodamine B (RhB) with the prepared birnessite show that the organic dyes can be efficiently degraded under the acidic condition in the absence of any oxidizing agents such as hydrogen peroxide and persulfate without any auxiliary equipment such as ultrasound, microwave and the like; the preparation method has characteristics of cheap and easily available raw material, simple preparation process, time saving, and labor saving; and the prepared product can degrade the organic dyes under the simple condition, can provide the significant effect, and can achieve the treatment on the industrial organic dye pollution.
Owner:HUNAN UNIV
Screening method for preparing medium-molecular-weight dextran strain
Owner:CHANGZHOU C PE PHOTO ELECTRICITY SCI & TECHN
Method for removing residual pharmaceutical ingredients in oxytetracycline pharmaceutical dregs by ultrasonic wave
InactiveCN102553891BFast degradation rateEasy to handleSolid waste disposalCavitationAdditive ingredient
Owner:HEBEI UNIVERSITY
A kind of method utilizing bacillus pumilus to degrade aflatoxin b1 or m1
ActiveCN104087528BMild degradation conditionsSimple and fast operationBacteriaMicroorganism based processesMetaboliteBacillus pumilus
The invention provides a Bacillus pumilus and application thereof in degrading aflatoxin. The collection number of the Bacillus pumilus is CGMCC No.9086, and the metabolite can effectively degrade the aflatoxin.
Owner:BEIJING YUANSHENGYUAN SCI & TECH DEV
A kind of preparation method of degradable primary amine curing agent
ActiveCN103435504BLow costShorten the production cycleOrganic compound preparationAmino-hyroxy compound preparationEpoxyFiber-reinforced composite
The invention provides four preparation methods of degradable primary amine curing agents, including the reaction of raw materials and ammonia or ammonia water to generate primary amine curing agents, and the raw materials undergo Gabriel reaction to generate o-(benzene) dicarboximide groups The compound, and then the compound is hydrolyzed or hydrazinolyzed to obtain a crude product, and then the crude product is purified to obtain a primary amine curing agent. The epoxy resin and the fiber-reinforced composite material prepared by the primary amine curing agent obtained by the method have good degradation performance, are environmentally friendly, and belong to green environmental protection materials.
Owner:长沙艾达索高新材料有限公司
A device for photocatalytic advanced treatment of wastewater
InactiveCN105776686BEasy to handleStrong oxidation abilityEnergy based wastewater treatmentMultistage water/sewage treatmentWastewaterThin layer
The invention belongs to the field of water treatment application, and provides a device for photocatalytic advanced treatment of wastewater, which includes a water inlet pipe, a nozzle and a pool body, and the water inlet pipe is connected to the pool body through a nozzle; the pool body includes a photocatalytic part and multiple The medium combination treatment part, the multi-media combination treatment part is located directly below the photocatalytic part; the present invention is an advanced treatment device composed of thin water film multi-layer oxidation and multi-media combination of wastewater, which can efficiently treat waste water It has strong oxidizing ability, good adaptability, mild degradation conditions, no need to add oxidant, and the treatment process is cheap, safe and easy to operate.
Owner:JIANGSU UNIV
Degradable thermosetting 3D printing mold and preparation method thereof
ActiveCN114656590AImprove printing accuracyGood dimensional stabilityAdditive manufacturing apparatus3D object support structuresPolymer scienceMeth-
The invention relates to a degradable thermosetting 3D printing mold and a preparation method thereof. The preparation method of the degradable thermosetting 3D printing mold comprises the following steps: (1) taking vanillin, pentaerythritol and methacryloyl chloride as raw materials, and synthesizing a difunctional acrylate monomer containing a degradable diacetal structure through a two-step method; and (2) mixing the difunctional acrylate monomer containing the diacetal structure, 4-acryloylmorpholine and a photoinitiator, and carrying out photocuring 3D printing to obtain the degradable thermosetting 3D printing mold. The prepared degradable thermosetting 3D printing mold is high in printing precision, the preparation method is environmentally friendly, the preparation process is simple, industrial production is easy, the obtained resin has excellent comprehensive performance, and the method for preparing the high-performance degradable thermosetting 3D printing mold through the thermosetting resin is created.
Owner:FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
A method for degrading, obtaining and detecting chondroitin sulfate and hyaluronic acid disaccharide
ActiveCN103698426BAccurate and comprehensive structural informationLower requirementComponent separationUronic acidDerivatization
Owner:OCEAN UNIV OF CHINA
Degradable photoresist and application thereof in 3D printing
PendingCN114773526AFast preparationSimple methodAdditive manufacturing apparatusHydropoly/poly sulfide preparationDiethyl phosphateMethacrylate
The invention discloses a preparation method and a use method of a degradable photoresist capable of being used for two-photon polymerization printing, and the preparation method comprises the following steps: using disulfide dimethacrylate (DSDMA) containing a reversible disulfide bond as a cross-linking agent, using a multi-sulfydryl molecule as a monomer, and carrying out cross-linking through ultraviolet light or two-photon polymerization; degradation of the photoresist can be realized in an organic solution of dithiothreitol (DTT), diethyl phosphate or other reducing reagents or a Tris-HCl aqueous solution of which the pH value is greater than 7, and a degradation product is dissolved in water; the cross-linking agent, the monomer, the photoinitiator and the polymerization inhibitor are mixed to obtain the photoresist system, the photoresist can be used for 3D printing based on two-photon polymerization, shows good printing performance and degradation performance, solves the problem that commercial photoresist lacks an additional degradation function, and can be applied to multi-material printing, biological scaffolds and the like.
Owner:SOUTHEAST UNIV
Ionic liquid-complex microbial inoculum system
ActiveCN112063544ASolve pollutionEfficient enzymatic hydrolysisFungiOrganic chemistryHydrolysateCandida tropicalis
The invention discloses an ionic liquid-complex microbial inoculum system which comprises ionic liquid and a complex microbial inoculum. The ionic liquid and the complex microbial inoculum form a coupling system for enzymolysis of lignocellulose; the ionic liquid contains 1-ethyl-3-methylimidazole ferric chloride salt; and the complex microbial inoculum comprises fermentation liquor of wet cellulomonas, streptomyces albus, candida tropicalis and white rot fungi. In an enzymolysis test, the highest cellulase activity of enzymatic hydrolysate is 185.1 U.mL<1>, the degradation weight loss rate ofgarden biomass reaches 52.6% and is respectively increased by 59.0% and 66.5% with respect to that of a only complex microbial inoculum, and lignin content of enzymolysis residues is reduced by 35.2%. In the enzymolysis application, the enzymolysis period of the garden biomass is 18 to 26 days, the high-temperature period lasts for 12 to 21 days, the highest temperature reaches 62 to 72 DEG C, the final degradation weight loss rate is 47.2 to 54.2%, and the lignin content is reduced to 8.5 to 10.6%. The ionic liquid-complex microbial inoculum system is simple and convenient in preparation process and outstanding in enzymolysis efficiency, and can meet the social requirements of intensive and resource treatment and utilization of agriculture and forestry biomass and the development conceptof green circulation.
Owner:XIAN BOTANICAL GARDEN SHAANXI PROV
Degradation method for treating phenolic wastewater by ultrasonic collaborative pulse electric field
InactiveCN102774927BEasy to cleanPass smoothlyWater/sewage treatment with mechanical oscillationsWater contaminantsPotassiumPulse power supply
The invention relates to a degradation method for treating phenolic wastewater by ultrasonic collaborative pulse electric field. The degradation method comprises the steps of: adding sodium salt or potassium salt electrolyte into the phenolic wastewater to be degraded, and adjusting the pH value to be 4-10 by using acid or alkali; putting electrodes into the phenolic wastewater, wherein the distances among the electrodes are within the range of 10-35mm, and controlling the constant voltage of a pulsed power supply to be 8-12V and the pulse period to be 0.1-10ms; inserting an ultrasonic head into the phenolic wastewater, and adjusting the ultrasonic output power to be 50-900W and the frequency to be 20-25kHz, the ultrasonic time to be 0.5-10s and the interval time to be 0.5-10s; and then, starting ultrasonic wave and the pulse electric field for degradation. The degradation efficiency of phenol is improved by the synergistic effect of the ultrasonic wave and the pulse electric field; and under the same pulse electric field, the degradation rate is obviously increased compared with the pure pulse electric field or ultrasonic field. The degradation method is simple in operation, the electrodes used by the method are low in cost and easily obtained, the phenol can be completely degraded, and the degradation process is safe and environment-friendly.
Owner:LOGISTICAL ENGINEERING UNIVERSITY OF PLA
Earthworm fermentation liquid-based feed additive, and preparation method and application thereof
PendingCN111134236AEnhance immune functionReduce feed intakeLactobacillusAnimal feeding stuffBiotechnologySugar amine
The present invention relates to an earthworm fermentation liquid-based feed additive, and a preparation method and an application thereof. The feed additive comprises earthworm fermentation liquid asa basic component, and an amino sugar oligomer and a sodium metabisulfite compound as a synergistic component; the amino sugar oligomer is a product of chitosan degraded by aspergillus tamarii; the sodium metabisulfite compound is composed of core particles containing sodium metabisulfite and an enteric coating coating the core particles; and a mass ratio of the amino sugar oligomer to the sodiummetabisulfite compound is (4.0-4.5):1. The feed additive has significant benefits for growth and fattening, survival rate and immune system of livestock and poultry animals, significantly reduces occurrence of toxic effects such as decreased feed intake, growth rate, immunity and survival rate of livestock and poultry caused by vomiting toxins, and can more efficiently improve animal production efficiency.
Owner:扈希功
Paenibacillus d7 and its application in degrading cellulose
ActiveCN105802879BMild degradation conditionsImprove reproductive abilityBacteriaMicroorganism based processesBiotechnologyBacilli
The invention discloses Bacillus genus D7 and its application in degrading cellulose. The strain of the invention can degrade sodium carboxymethyl cellulose (CMC-Na), cellulose of water extraction residue of waste inferior tobacco leaves and Cellulose materials such as tobacco leaves and stems, and the cellulase produced by the bacteria has the characteristics of high temperature resistance of 60°C and a wide range of catalytic substrate pH4-8. It has tolerance; compared with physicochemical and mechanical methods to degrade cellulose, the degradation conditions of the bacteria are milder; compared with fungi, bacteria have stronger reproductive ability, are easy to cultivate, and can be gradually enlarged, and industrial applications are expected to be realized in the later stage; The bacterial species of cellulase include Bacillus amyloliquefaciens, Clostridium thermobacterium, Paenibacillus and the like.
Owner:ZHEJIANG UNIV OF TECH
A kind of preparation method of bamboo liquid-collagen polypeptide composite adhesive
ActiveCN109517580BImprove water resistanceImprove adhesionProtein adhesivesLignocellulosic adhesivesPolymer scienceAdhesive
The invention discloses a preparation method of a bamboo liquid-collagen polypeptide composite adhesive. The preparation method comprises the following steps of: step (1). putting bamboo powder into alkali liquor in a reaction kettle, and performing primary alkali thermal degradation reaction to obtain bamboo liquid; step (2). adding leather meal to the bamboo liquid in the reaction kettle, and performing secondary alkali thermal degradation reaction on the leather meal to obtain bamboo liquid-collagen mixed degradation liquid; step (3). performing mechanical filter pressing on the bamboo liquid-collagen mixed degradation liquid to collect filtrate; and step (4). adjusting the pH of the filtrate, adding a crosslinking agent and a plasticizer, stirring and reacting to obtain the bamboo liquid-collagen polypeptide composite adhesive. The preparation method of the bamboo liquid-collagen polypeptide composite adhesive utilizes biomass resources and has low production cost.
Owner:NINGBO UNIVERSITY OF TECHNOLOGY
A kind of mushroom oligosaccharide with excellent antioxidant activity and preparation method thereof
ActiveCN108265092BImproves antioxidant activityMild degradation conditionsFermentationFood ingredient functionsBiotechnologyOligosaccharide
The invention discloses a lentinan oligosaccharide with excellent antioxidant activity and a preparation method thereof. The method steps are: (1) mixing lentinan with distilled water, adding β-mannanase, adjusting the pH=5-7, ‑60°C in a constant temperature water bath, stirred and boiled for 13‑17 minutes to stop the reaction, filtered, concentrated the filtrate, dialyzed the concentrated solution to remove undegraded macromolecular lentinan, concentrated the dialysate, and freeze-dried to obtain crude lentinan oligosaccharides; (2 ) According to the proportion, take the crude lentinus oligosaccharides and dissolve them in distilled water, add an aqueous ethanol solution, ethanol precipitation, centrifuge, and concentrate the supernatant to lyophilize; (3) separate and purify the lyophilized product through a Sephadex G‑15 column. The invention adopts an enzymatic hydrolysis method to degrade the lentinan, and the degradation condition is mild. The preparation process is simple and the yield is high. The prepared oligosaccharide has excellent antioxidant activity and can be used in health products, food and medicine and antioxidant additives.
Owner:TIANJIN UNIV
Method for degrading heparan sulfate and detecting heparan sulfate disaccharide composition
ActiveCN103713057BLower requirementMild degradation conditionsSugar derivativesComponent separationHeparan sulfateMass spectrometry
Owner:OCEAN UNIV OF CHINA
A kind of ultra-low molecular weight heparin sodium and preparation method thereof
ActiveCN112175109BReduce sheddingGuaranteed anticoagulant activityBlood disorderExtracellular fluid disorderHeparin sodiumBiomedicine
The invention relates to an ultra-low molecular weight heparin sodium and a preparation method thereof, belonging to the field of biomedicine. Through membrane separation, the low molecular weight heparin sodium is further degraded into heparin fragments. The preparation method has mild degradation conditions, can reduce the detachment of the sulfonic acid group from the heparin, and can realize that almost all the raw materials of the heparin sodium are depolymerized into the ultra-low molecular weight heparin sodium. The ultra-low molecular weight heparin sodium prepared by this method has a high yield, an average molecular weight of less than 3000 Da, and a higher anti-Fxa biological activity.
Owner:山东万邦赛诺康生化制药股份有限公司
Method for double-frequency composite ultrasonic degradation of phenol in rural sewage
InactiveCN110627158AEnhanced degradation technologyGood workmanshipWater contaminantsWater/sewage treatment with mechanical oscillationsSewageMaterials science
The invention discloses a method for double-frequency composite ultrasonic degradation of phenol in rural sewage, and belongs to the technical field of phenol degradation. According to the method, double-frequency composite ultrasonic treatment is adopted to perform ultrasonic treatment on a to-be-degraded phenol solution for 10-30 min; the double-frequency composite ultrasonic degradation rate onphenol can reach 83.74%, and is improved by 45.23% and 51.11% compared with the degradation rate of single probe type ultrasonic treatment and single groove type ultrasonic treatment. Therefore, it is obviously shown that the degradation effect of dual-frequency composite ultrasonic synergistic degradation on phenol in water is ideal.
Owner:SOUTH CHINA UNIV OF TECH +2
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