30 results about "Co immobilization" patented technology

A method for co-immobilizing anammox bacteria-short-range nitrifying bacteria and its application belong to the technical field of sewage treatment, using polyvinyl alcohol, sodium alginate and activated carbon as embedding agents to anaerobic ammonium oxidizing bacteria and short-range nitrifying bacteria Layered embedding and fixation, firstly mix equal volumes of anammox sludge and embedding agent uniformly, get anaerobic ammonium oxidation gel pellets after fixation, and then put them into the mixed solution of short-range nitrifying bacteria and embedding agent In the process, anammox-short-range nitrifying bacteria gel pellets were obtained after fixation, and were directly added to the autotrophic denitrification reactor after activation. The present invention uses immobilized microbial technology to co-immobilize anammox bacteria and short-range nitrification bacteria on the same carrier, and stably enrich high-activity anammox and short-range nitrification sludge, so that the biological efficacy of the two bacteria can be coordinated. , to realize the coordinated operation of short-range nitrification reaction and anammox reaction.

The invention discloses co-immobilization glucose oxidase/catalase microspheres and application thereof in preparation of gluconic acid (salt) for catalytic oxidation of glucose. The co-immobilization glucose oxidase/the catalase microspheres can effectively promote covalent linkage of carriers and enzyme molecules, immobilization efficiency is improved greatly, service life of immobilization glucose oxidase (GOD)/catalase (CAT) is prolonged remarkably, the co-immobilization glucose oxidase/the catalase microspheres can be used repeatedly, are low in production cost, and facilitate sustainable development. Gluconic acid (salt) prepared by the co-immobilization glucose oxidase/the catalase microspheres is high in yield, reaction condition is temperate, a device is simple and easy to obtain, and the production method is environment-friendly.

In a dextran coated surface disposed on a carrier, the connections between the dextran and the carrier surface are formed by a photolinker, the dextran coating being attached to the carrier surface by co-immobilization of a mixture of dextran and the photolinker.

The invention provides a reaction separating and coupling apparatus, and a technology for preparation of gluconic acid from xylitol crystallization mother liquor. The reaction separating and coupling apparatus comprises a nanofiltration device, a co-immobilization glucose oxidase and catalase column reactor; a fixed bed chromatography column, a computer control system, a transmission pump, a raw material liquid storage tank, a product liquid storage tank, an eluate storage tank, and valves. Reaction coupling of the co-immobilization glucose oxidase and catalase column reactor and adsorption processes of the fixed bed chromatography column is realized for the first time, so that a gluconic acid solution containing a large amount of impurities is prepared from xylitol crystallization mother liquor by the immobilization enzyme column reactor, and is delivered into the fixed bed chromatography column directly, and production of high purity gluconic acid with selectivity is realized. Production efficiency of gluconic acid from xylitol crystallization mother liquor is increased; feedback inhibition is eliminated; the value of industrial waste is increased; and reaction, solid-liquid separation and purification are combined by the reaction separating and coupling apparatus, and the technology. The obtained gluconic acid is colorless crystals, yield is of 84 to 95%, and purity can reach 94 to 97%.

The invention discloses a microwave-assisted co-immobilization method of aldehyde ketone reductase and glucose dehydrogenase. The method includes the steps that a carrier and a crosslinking agent are mixed and activated, centrifuging is conduced, sediments are taken and washed through a PBS solution, centrifuging is conducted, and the sediments are re-dispersed in the PBS solution; the aldehyde ketone reductase and the glucose dehydrogenase are added to a dispersed solution, the mixed liquid is irradiated at the temperature of 0 DEG C to 10 DEG C under the 20-45 W microwave condition for 1 min to 5 min, centrifuging is conducted, sediments are taken and washed through the PBS solution, and co-immobilized enzyme is obtained; compared with free enzyme, the catalytic activity, heat stability and PH stability of the co-immobilized enzyme prepared through the method are improved; the glucose dehydrogenase serves as a coenzyme regeneration system of the glucose dehydrogenase to provide NAD(P)H required by a reaction, the cost is lowered, and industrial production is facilitated.

The invention discloses an embedding and co-immobilization method of aldehyde ketone reductase and glucose dehydrogenase. The method includes the steps that the aldehyde ketone reductase and the glucose dehydrogenase are mixed and then added to a sodium alginate aqueous solution to be stirred and mixed evenly, then the mixture is dropwise added to a Cacl2 aqueous solution, the mixture is made to stand in a refrigerator at the temperature of 4 DEG C, washing is conducted through distilled water, vacuum filtration is conducted, and immobilized particles are obtained. Compared with free aldehyde ketone reductase, the catalytic activity of the co-immobilized enzyme prepared through the method is increased by 1.32 times, the heat stability, the PH stability and other performance of the co-immobilized enzyme prepared through the method are improved as well, and meanwhile, the cost is lowered due to reuse of the co-immobilized enzyme.

The invention discloses a system for co-immobilizing laccase and a mediator on amino silanized magnetic oxidized graphene nano particles and a preparation method thereof. The system is obtained by co-immobilizing the laccase and the mediator on the amino silanized magnetic oxidized graphene nano particles, 0.3-0.6 mmol of mediator is fixed in every 1 g of laccase and mediator co-immobilizing system, and the laccase activity after co-immobilization is 120-300 U/g. The laccase and the mediator are co-immobilized on the magnetic oxidized graphene carrier for the first time and can be recovered and recycled through an external magnetic field, the electron transfer efficiency between the laccase and a substrate is improved through graphite oxide, accordingly the laccase utilization rate is improved, and the cost is reduced.

The invention discloses a double-strain co-immobilization fermented mulberry wine and a preparation method thereof. The preparation method comprises the following steps: selecting mulberries, cleaning, juicing, carrying out enzymolysis, filtering and centrifugating, regulating the components, pasteurizing, cooling, carrying out primary fermentation on immobilized Saccharomyces cerevisiae and Zygosaccharomyces cidri, clarifying, filtering, carrying out secondary fermentation, aging, filtering, purifying through an ultrafiltration membrane, and filling to obtain the finished product. The method can effectively solve problem of low storability of massive mulberries in the ripening season, and the problems of complex operation, high inactivation tendency of the strains and the like in the traditional fermented fruit wine. The method can perform mass continuous production on the mulberries, shorten the production cycle, enhance the productivity, recycle the strains and lower the production cost. The mulberry wine is clear and transparent, has the stable purple color, has the particular subtle fragrance of the mulberries, and is soft and thick in mouthfeel. Compared with the mulberry wine fermented by the traditional process, the odorous constituents are obviously enhanced. The mulberry wine has the health-care effects of tonifying the blood, nourishing yin, moisturizing the intestines, postponing aging, blackening the hair, improving the eyesight, improving the skin blood supply and the like.

The invention discloses a noncellular synthetic biology based preparation method of 2-phenylethanol and an application. According to the preparation method and the application, three recombinases including ARO8, ARO10 and ADH1 are utilized to constitute a co-reaction system, and a complicated metabolic process of an Ehrlich pathway requiring multi-step continuous reaction and multi-enzyme participation for synthesis of 2-phenylethanol in microorganisms is simplified to be performed in the same reaction system in vitro, so that the environmental pollution is reduced and the reaction process is shortened. Furthermore, the three recombinases are subjected to carrier-free co-immobilization with glutaraldehyde serving as a cross-linking agent, Combi-CLEAs (Combi-Cross-linked Enzyme Aggregates) are prepared, a target product is synthesized in vitro, accordingly, the enzymes are further recycled on the basis of the beneficial effects, and the production cost is reduced; the preparation method fills up the technical blank of multi-enzyme preparation of 2-phenylethanol in vitro, and important reference is provided for biological preparation of 2-phenylethanol.

The invention discloses a keto group reduction catalytic system construction and cyclic operation method. The method comprises the following technical implementation steps that a carrier is used for conducting co-immobilization treatment on reductase for catalyzing a keto group reaction and glucose dehydrogenase for catalyzing regeneration of coenzyme to prepare immobilized multi-enzyme; a keto group reduction cyclic catalysis system composed of an immobilized multienzyme reactor, a product extraction device and a 300-600Da nanofiltration device is adopted; in the immobilized multienzyme reactor, coenzyme is free in a reaction solution and cooperates with the immobilized multi-enzyme, and the keto group reduction reaction and the cyclic regeneration of the coenzyme are completed. After thereaction is completed, the immobilized enzyme is filtered and recycled, and a product is extracted from filtrate; mother liquor is extracted, calcium chloride is added to remove gluconic acid, then inorganic salt is removed by the 300-600Da nanofiltration device, and meanwhile the coenzyme is recycled, so the cyclic operation of the keto group reduction catalysis system is achieved. The method has the advantages that the cost is low, the efficiency is high, the operation is simple, the product quality is high, and few impurities are generated.

A co-immobilization method for lactase and glucose isomerase belongs to the food biology technology area. The invention uses gelatine, sodium polymannuronate and/or carrageenan as the carrier; the first embedding and after cross linking process is applied; or the nylon net is used as the carrier; the first cross linking and after covalent combination method is used for the co-immobilization of lactase and glucose isomerase. The distinct characteristics of the invention are that the co-immobilization of lactase and glucose isomerase can not only realize recycle utilization of the enzyme which saves the economic cost and simplifies the downstream separation steps, but also exert the cooperation function between two enzymes which improves the reaction efficiency. The invention has a novel idea, a simple process and a strong practicality. The obtained lactase and glucose isomerase can be used for the transformation of lactose for the preparation of lactulose. The invention has good application prospect.

The invention discloses a method for preparing calcium gluconate through co-immobilization of glucose oxidase and catalase. With glucose as a substrate, a technology adopting glucolactone, chitosan and calcium alginate for co-immobilization of glucose oxidase and catalase for catalytic oxidation of glucose is used for preparing calcium gluconate; the technology can significantly improve the enzyme activity and reduce conversion steps, the sugar conversion rate is greatly increased, energy consumption is saved, and the production cost is reduced.

The invention discloses an immobilized enzyme and a preparation method thereof. The preparation method of the immobilized enzyme comprises the following steps: dissolving ferroferric oxide in a firstbuffer solution to obtain a base material solution, and adding a dopamine salt for coating treatment so as to obtain a polydopamine coated ferroferric oxide nanocomposite; dissolving nonspecific lipase and sn-1,3 specific lipase in a second buffer solution so as to obtain an enzyme buffer solution; enabling the polydopamine coated ferroferric oxide nanocomplex to be in contact with the enzyme buffer solution, and obtaining the immobilized double enzyme through covalent fixation. According to the method, the ferroferric oxide nanocomposite is used as a fixed carrier, and the sn-1,3 specific lipase and the nonspecific lipase are subjected to co-immobilization treatment to obtain the immobilized double enzyme. The preparation process is simple, the conditions are mild, meanwhile the stabilityof the prepared immobilized double enzyme is good, the catalytic effect is high, the separation and recovery are easy, the repeated use effect is good, and the enzyme is convenient for industrial production.

The invention provides a method for catalytic synthesis of a sitagliptin chiral intermediate (3R)-3-amino-1-[3-(trifluoromethyl)-5,6,7,8-teralin-1,2,4-triazol[4,3-a]pyrazine-1-yl]-4-(2,4,5-trifluoro-phenyl)buta-1-one by means of engineering bacterium cells containing transaminase-coenzyme pyridoxal phosphate co-immobilization Escherichia coli, E.coli). The method comprises the steps of culturing engineering bacteria containing transaminase Escherichia coli, preparing co-immobilization cells, and synthesizing the immobilization cell asymmetric catalysis itagliptin chiral intermediate. The transaminase-PLP co-immobilization cells are adopted as a catalyst, the stability is good, the service life is long, the organic solvent is good in tolerance, repeated usage can be performed, no expensiveexogenous coenzyme needs to be added in the reaction process, and the production cost is greatly lowered. The method is simple in technology, low in cost and high in product yield and purity, and hasthe quite high application value in the industrial production of the sitagliptin chiral intermediate.

The invention discloses a method for extracting a collagen peptide from grass carp scales. The method comprises steps as follows: fish scale pretreatment, protease co-immobilization, enzymolysis, ultrafiltration and freeze drying. 1-ethyl-3-(3-methylamino)propyl carbodiimide is used for activating chitosan, chitosan is coupled with glutaraldehyde to form a lipase immobilized carrier, and the hydrolysis degree, the enzymatic hydrolysis speed and the end group changing type of protein of the grass carp scales are improved through coordinated coordinated enzymatic hydrolysis of soybean protease and bromelain. The method has the benefits as follows: the obtained collagen peptide has small molecular weight and high purity and can directly reach the corium layer of skin to make skin tight, fine and smooth. The collagen peptide has a better antioxidant function, has a high scavenging rate for free radicals including DPPH., super O2<-> and .OH and has a remarkable anti-aging effect. The collagen peptide has an unexpected anti-tumor effect and has an anti-tumor specific T lymphocyte immune response while enhancing the non-specific immunity in a body.

The invention discloses an orderly, directional and co-immobilization enzyme membrane reactor and a preparation method and application thereof. On the basis of a pervaporation membrane assembly, the pervaporation membrane assembly comprises a pervaporation membrane composited with a microfiltration membrane, immobilized enzymes of combination enzymes needed for a reaction are sequentially immobilized to the microfiltration membrane according to the enzyme catalysis cascade reaction sequence, the combination enzymes are any one of combination of horse radish peroxidase and glucose oxidase, combination of tyrosinase and alkaline phosphatase, combination of long-chain alcohol oxidase and omega-transaminase, and combination of ethanol dehydrogenase, cyclohexanone monooxygenase and lipase, thecatalytic reaction efficiency is advantageously improved, the immobilized enzymes are integrated on one microfiltration membrane, and the multi-step catalytic intermediate product transferring efficiency is improved; by arranging the microfiltration membrane, reacting and separating are integrated, and reaction balance advantageously moves in the favorable direction; and reaction conditions are mild, and an enzyme immobilization method is simple.

The invention belongs to the technical field of separation of natural products, and relates to a method for extracting myricetin through microbial fermentation. The method comprises the following steps of (1) preparing co-immobilization gel beads containing aspergillus niger spore suspension and lactobacilli suspension; (2) mashing myricetin extraction raw materials, adding ethanol, performing reflow extraction for 1-5 times, combining filtrate, performing concentration, and drying filter residues; (3) adding water to a fermenter, adding the co-immobilization gel beads obtained in the step (1), an extract obtained in the step (2) and 1/5-4/5 of dried filter residues, and performing fermentation and extraction at 40-50 DEG C for 140-170h; (4) after the fermentation is completed, filtratingfermentation liquid with a screen mesh, and removing the co-immobilization gel beads; (5) performing reflow extraction on the filtered fermentation liquid with ethanol for 1-5 times, combining filtrate, and performing concentration so as to obtain precipitate; and (6) repeatedly washing the precipitate with water for 4-6 times so as to obtain finished products. Through the adoption of the extraction method, the yield and the purity of the myricetin are greatly increased, and the method is environmentally-friendly and safe.

The invention discloses a method for preparing zinc gluconate through co-immobilization of glucose oxidase and catalase. Glucose is used as a substrate, and glucolactone, chitosan and calcium alginate are adopted for co-immobilization of glucose oxidase and catalase so as to achieve catalytic oxidation of glucose, so that zinc gluconate is prepared. By the adoption of the technique, enzyme activity is improved remarkably, the number of transformation steps is reduced, the glucose conversion rate is increased greatly, energy consumption is reduced, and production cost is reduced.

The present invention discloses a method for catalyzing sequential enzyme reaction (coupling reaction) by using fusion protein. Its steps are: utilizing external gene to splice, constitute and express "enzyme-connecting peptide-enzyme" double catalytic activity fusion protein to obtain pure fusion protein product, and comparing and analyzing catalytic kinetic property of fusion protein. The connecting peptide is used for increasing molecular distance between two enzymes are reducing their steric hindrance, and making the fusion protein maximally retain its original biological activity. Said fusion protein possesses catalytic activity of two enzymes simultaneously, and in the preparation of sequential enzyme sensor and enzyme reactor implements sequential active enzyme controlled co-immobilization so as to raise the reaction rate of sequential enzyme reaction. It is suitable for making high-quality sequential enzyme sensor and immobilized enzyme reactor.

The invention discloses a method for preparing sodium gluconate through co-immobilization of glucose oxidase and catalase. Glucose is used as a substrate, and glucolactone, calcium alginate and chitosan are adopted for co-immobilization of glucose oxidase and catalase so as to achieve catalytic oxidation of glucose, so that sodium gluconate is prepared. By the adoption of the technique, enzyme activity is improved remarkably, the number of transformation steps is reduced, the glucose conversion rate is increased greatly, energy consumption is reduced, and production cost is reduced.