93results about How to "Rich in nitrogen" patented technology

The invention discloses a fungal alpha-amylase-containing beer complex enzyme and a preparation method thereof, belonging to the field of enzyme preparation processing. The high-activity fungal alpha-amylase and other food grade enzyme preparations, plant extracts, antioxidants, protective agents, activating agents and the like can be scientifically compounded by taking concentrated maltase and concentrated malt juice powder as main raw materials; the prepared beer complex enzyme is complete in proteases, high in enzyme activity, difficult to deactivate, mellow in malt aroma, and capable of providing abundant nitrogen source for malt juice, wherein the activity of fungal alpha-amylase in fermenting liquor during the preparation of fungal alpha-amylase is 17000-21000 U/mL. The complex enzyme can be stored for 12 months under the conditions of 0DEG C and 40DEG C, the single enzyme activity loss in the complex enzyme are respectively 0.50% and 0.72%, the enzyme deactivation caused by environment change, and inappropriate operation methods during packaging, storage, transportation, use and the like can be effectively prevented, especially the enzyme deactivation caused by high temperature can be prevented.

The invention discloses a preparation method of a lithium-selenium battery positive electrode. The preparation method of the lithium-selenium battery positive electrode comprises the following steps: depositing or growing a nitrogen-containing conductive polymer on the surface of a piece of paper, then carrying out alkaline activation and high-temperature carbonization to obtain a nitrogen-containing layered porous carbon compound current collector which takes a carbon fiber network structure as a self-supporting body, and further compounding the compound current collector with selenium to obtain the lithium-selenium battery positive electrode which is high in content of selenium, good in selenium fixation effect, high in mechanical performance and high in electrochemical performance. The preparation method of the lithium-selenium battery positive electrode is easy to operate, free from pollution and low in cost; the prepared lithium-selenium battery electrode is directly used for preparing a lithium-selenium battery with the high cycle performance and rate capability in the absence of an adhesive and a corresponding coating process.

The invention relates to a nitrogen-doped porous hollow carbon sphere carbon dioxide adsorption material as well as a preparation method and application thereof. The preparation method comprises the following steps: adding SiO2 sphere flowers into mixed liquid of deionized water, absolute ethyl alcohol and ammonia water, and carrying out ultrasonic oscillation until the SiO2 sphere flowers are completely dispersed; and then adding a dopamine hydrochloride water solution, uniformly stirring at the room temperature, filtering, washing, drying, and processing at 700-900 DEG C for 2-4 hours in a N2 atmosphere so as to obtain nano-composite spheres; and finally impregnating the nano-composite spheres in hydrofluoric acid to remove the SiO2 sphere flowers, filtering, washing, and drying, so as to obtain the nitrogen-doped porous hollow carbon sphere CO2 adsorption material. The adsorption material is a porous hollow carbon sphere, the particle sizes of porous hollow nano-carbon spheres are about 400nm, the porous hollow nano-carbon spheres are uniform and regular, and the adsorption material has high nitrogen content, adsorptive property, specific surface area and pore volume and high-dispersed regular appearance, the surface of the adsorption material contains rich amino active sites, and the adsorption material can be applied to efficient adsorption of industrial CO2.

The invention discloses a compound enzyme for bear, and belongs to the field of enzyme preparation processing. The compound enzyme adopts a natural concentrated maltase as a main material, and is complexed with a mixed enzyme scientifically, so that not only are full enzyme sources filled, but also more importantly under the synergistic effect of a protective agent and an activating agent, the enzyme activity is enough, the storage performance is good, a nitrogen source is rich, the malt flavor is strong, and the loss rate of the enzyme activity after 2-year storage at normal temperature is less than 3%. The compound enzyme disclosed by the invention has the advantages that the complexing is scientific, the preparation process is simple, the function of a product is complete, the storage period is long, the transportation, the storage and the use are convenient, especially a solid foundation is laid for carrying out added enzyme-preparation saccharification with the auxiliary-material ratio, reducing the production cost of the bear and producing the high-quality traditional bear with rich nutritional values and natural-pure taste and flavor.

The invention relates to a nitrogen-doped carbon-coated vanadium nitride electrode material as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly, preparing a vanadium pentoxide nanowire precursor from vanadium pentoxide as a main raw material; by taking a pyrrole monomer as a main raw material, coating the surface of the vanadium pentoxide nanowire precursor with polypyrrole; finally performing calcining, thereby obtaining the electrode material. The preparation method is simple, high in repeatability and relatively low in equipment and chemical requirement; the prepared electrode material can be not only applied to a lithium-sulfur battery anode material, but also used as a lithium ion battery cathode material, can be compounded with graphene and is excellent in electrochemical property.

The invention belongs to the field of a new energy material, and relates to a nickel-cobalt double hydroxide/nitrogenous carbon nanohorn composite material used for a supercapacitor and a preparation method for the composite material. The composite material is prepared from the nickel-cobalt double hydroxide and the nitrogenous carbon nanohorn in a compounding manner; the preparation process comprises the steps of preparing the nitrogenous carbon nanohorn firstly by adopting a hydrogen arc method; then preparing a mixed solvent of water and ethanol, adding nickel nitrate and cobalt nitrate to the mixed solvent, adding urea to be used as an alkali source, and carrying out uniform ultrasonic dispersion to obtain a dual-metal-salt solution; and finally, adding the nitrogenous carbon nanohorn to the dual-metal-salt solution, carrying out uniform ultrasonic dispersion and then implementing a microwave hydrothermal reaction, and next, carrying out suction filtration, washing, drying and grinding on the prepared precipitates to obtain the nickel-cobalt double hydroxide/nitrogenous carbon nanohorn composite material.

The invention discloses a beer compound enzyme containing acid protease and a preparation method of the beer compound enzyme containing the acid protease and belongs to the field of enzyme preparation processing. The beer compound enzyme complete in protease system, high in enzyme activity, less prone to inactivation, strong in malt fragrance and capable of providing a rich nitrogen source for wort is mainly prepared from a concentrated malt enzyme and concentrated wort powder by scientifically compounding food-grade enzyme preparations such as the high-activity acid protease, plant extracts, antioxidants, protective agents, activating agents and the like, wherein the enzyme activity of the acid protease in fermentation liquor in an fermentation liquor preparation process is 18000-20000U/mL. When the beer compound enzyme is stored at the temperatures of 0 DEG C and 40 DEG C for 12 months, enzyme inactivation rates of single enzyme in the beer compound enzyme are 0.53% and 0.8% respectively, so that enzyme inactivation caused by environment changes and improper operation methods during packaging, storage, transportation, use and the like can be prevented effectively, and especially, enzyme inactivation caused by high temperature can be prevented.

The invention discloses a beer compound enzyme containing neutral protease, and belongs to the field of processing of an enzyme preparation. The beer compound enzyme takes natural concentrated malt enzyme as a main raw material, and the mixed enzyme is scientifically compounded, so that not only is an enough enzyme source replenished, but also the beer compound enzyme is more enough in enzyme activity, more excellent in preservation property, more abundant in nitrogen source, and more sufficient in malt fragrance under the synergistic effects of a protective agent and an activating agent; the enzyme activity loss rate after storage for two years at normal temperature is smaller than 3%; the neutral protease in the mixed enzyme is prepared by liquid deep mixed fermentation under a specific fermentation condition by taking bacillus subtilis 1398-2-12 producing the neutral protease with strong thermal stability as an original strain, the enzyme activity of the neutral protease is 5500-7000U/mL, the optimum reaction temperature is 70 DEG C, the optimum reaction pH value is 7.2, and the neutral protease is more suitable for beer brewing. The beer compound enzyme is scientific to compound, the product is complete in function, long in expiration date, and convenient to transport, store and use, and a basis is established for production of excellent beer.

The invention discloses a preparation method of a lithium air battery electrode. The preparation method of the lithium air battery electrode comprises the following steps: sequentially growing or depositing a nitrogen-containing conductive polymer and a catalyst precursor on the surface of a piece of paper to obtain a piece of catalyst precursor/nitrogen-containing conductive polymer compound paper; putting the catalyst precursor/nitrogen-containing conductive polymer compound paper into an alkali solution containing nitrogen-containing organic matters for dipping, then putting the paper in a protection atmosphere for carbonizing and nitriding so as to obtain a metal nitride/nitrogen-containing layered porous carbon compound electrode by using a one-step method, wherein the metal nitride/nitrogen-containing layered porous carbon compound electrode is excellent in mechanical performance and electrochemical performance and high in energy density and uses a three-dimensional carbon fiber network structure as a self-supporting body. The compound electrode is capable of effectively reducing the charging and discharging polarization of the air battery and reducing the internal resistance of the battery. Compared with a conventional electrode preparation process, an adhesive and a coating process do not need to be used; the preparation method is easy to operate, environmentally-friendly, low in cost and capable of achieving the industrial production.

The invention belongs to the field of electrochemistry catalysis and particularly discloses a carbon-based non-metallic oxygen reduction catalyst as well as a preparation method and an application thereof. The carbon-based non-metallic oxygen reduction catalyst is a polymer which is prepared by doping other heteroatom (e.g. B, O, F, P, S, Cl, Br and I) derived from an N-contained polymerization product which is obtained by polymerizing aromatic nitrile compounds. The catalyst provided by the invention is high in conductivity, has a carbon skeleton structure with a high specific surface area and can be doped with many kinds of heteroatom. The catalyst has good oxygen reduction activity and high stability and is free from influence of methanol and carbon monoxide; besides, the catalyst is wide in application scope and is suitable for various systems containing oxygen reduction reaction, including a lithium air cell, a sodium air cell, kinds of fuel cells and so on; compared with an existing commercial platinum carbon (Pt/C) catalyst, the catalyst has the advantage of simple preparation, efficiency, environment friendliness, low cost and excellent performance.

The invention discloses a preparation method of a nitrogen-containing porous carbon/manganese dioxide nanowire composite electrode for a supercapacitor, which is prepared by using nitrogen-containingbiomass carbon and manganese dioxide as raw materials. Firstly, the manganese dioxide nanowires are synthesized by the hydrothermal method, and then the manganese dioxide nanowires, the nitrogen-containing biomass carbon and the silicon dioxide are mixed, and then subjected to high-temperature carbonization and alkali etching to form a composite electrode material finally. The prepared composite electrode material has a high specific capacitance value, and the specific capacity is up to 357.5 F/g in a 2 mol/L Ca(NO3)2 electrolyte; and the prepared composite electrode material has excellent cycle stability, and after 5000 cycles, the specific capacity can still maintain 97.2%. The biomass carbon used in the present invention is a renewable resource, and the manganese dioxide is an environment-friendly raw material, which are abundant in raw materials and low in cost. The composite electrode for supercapacitor prepared by the invention has excellent performance, is simple to operate, andcan meet the application requirements of energy storage.

The invention relates to the technical field of agricultural planting, in particular to a cultivation method for decreasing the tobacco incidence rate and improving the tobacco quality. The cultivation method for decreasing the tobacco incidence rate and improving the tobacco quality comprises the following steps that (1) tobacco field preparation is conducted; (2) organic materials are prepared and applied; (3) waterflooding and film-coating treatment is conducted; (4) base fertilizer is applied to the whole land; (5) planting and transplanting are conducted; and (6) top application is conducted. According to the cultivation method for decreasing the tobacco incidence rate and improving the tobacco quality, organic material applying, waterflooding and film-coating treatment are conductedon the tobacco field in the cultivation process, parts of soil pathogens can be directly killed through organic acid caused by anaerobic fermentation of the organic materials, and the tobacco incidence rate is reduced; the soil hardening level can further be improved after the organic materials are applied, weeds are decreased, and tobacco field soil nutrient material content is increased, thus the problems that the disease resistance of the tobacco is decreased due to soil degradation, and tobacco disease occurs frequently due to the fact that the cardinal number of pathogenic bacteria in weeds and soil and pests such as root-knot nematode is large are reduced, and the incidence rate of common diseases of the tobacco is remarkably reduced while the quality of the tobacco can be improved.

The invention discloses total-effect beer compound enzyme, and belongs to the field of enzyme preparation processing. The beer compound enzyme is scientific compound enzyme which adopts natural concentrated malt enzyme as the main material, so that not only can a sufficient enzyme source be supplemented, but also under the synergistic effect of protective agent and activator, the enzyme activity is more sufficient, the storage performance is better, the nitrogen source is richer, the malt fragrance is more sufficient, and enzyme activity loss ratio is lower than 3% after the two-year storage at the room temperature. The total-effect beer compound enzyme disclosed by the invention is scientific in composition, simple in preparation process, complete in product functions, long in quality guarantee period, convenient to transport, store and use. Especially, the total-effect beer compound enzyme can be used for carrying out saccharification onto external enzyme preparation with a high auxiliary material proportion, so that the beer production cost is lowered, and a solid foundation is laid up for producing excellent conventional beer which is high in nutritive value and pure and natural in mouthfeel and flavor.

The invention discloses a preparation method of a novel high efficiency recyclable olefin epoxidation reaction catalyst which uses nitrogen-rich covalent organic framework material CIN-1 as a carrierand is immobilized with polyoxometallate. The catalyst prepared by the method can be used for an epoxidation reaction of multiple types of olefin when taking oxygen as an oxygen source, has very highconversion rate and selectivity, and can be recycled and reused. The preparation method provided by the invention has the advantagescharacteristics of being simple in preparation method, short in reaction time, high in catalytic efficiency, high in selectivity, environmentally-friendly, energy-saving, low in cost and the like, thus having a broad application prospect in the field of catalysis.

The invention discloses a beer complex enzyme capable of improving beer foam property, belonging to the field of enzyme preparation processing. The beer complex enzyme takes natural concentrated malt enzyme and concentrated wort powder as main raw materials, mixed enzyme is compounded scientifically, so that a sufficient enzyme source is supplemented, what is important is that under the synergistic effect of a protective agent and an activating agent, the enzyme has stronger activity and more excellent preservation property, the nitrogen source is richer, and the enzyme activity loss ratio is less than 3% when the beer is preserved for two years. The beer complex enzyme is compounded scientifically, has a simple preparation method, has complete functions and long shelf life, is convenient to transport, store and use, and especially lays a firm foundation for additional enzymic preparation glycation by high accessory proportion, reduction of beer production cost, guarantee of the nitrogen source in the wort, and production of excellent beer with good foam property and rich foam.

The invention discloses a moringa-oleifera-sawdust-containing Se-enriched pleurotus geesteranus culture medium which is mainly made from the following raw materials by weight: 40-50% of moringa oleifera sawdust, 30-40% of miscellaneous tree sawdust, 5-15% of cottonseed shell and 5-15% of wheat bran. The raw materials of the moringa-oleifera-sawdust-containing Se-enriched pleurotus geesteranus culture medium are pure natural raw materials, without addition of any artificial synthetic selenium nutrition, a Se-enriched pleurotus geesteranus product can be produced, the yield of fruiting body of pleurotus geesteranus can be guaranteed, and quality is improved. The main component moringa oleifera sawdust of the Se-enriched pleurotus geesteranus culture medium is rich in nitrogen nutrient, loose in texture and good in permeability, mycelia of the pleurotus geesteranus are thick to grow, white, and fast in growth rate; by use of the Se-enriched pleurotus geesteranus culture medium, the amount of the wheat bran may be appropriate to reduce, the cost of the raw materials is reduced, original cultivation technical procedures are not changed, and the moringa-oleifera-sawdust-containing Se-enriched pleurotus geesteranus culture medium is easy to master and easy to popularize.

The invention discloses a rhizobium sp. WP 1-3, and the preservation number is CGMCC No.14472. In addition, the invention further discloses the application of the rhizobium to decomposition of potassium in soil and decomposition of insoluble phosphorus in the soil. The rhizobium is a dominant strain screened by taking potash feldsparf as a potassium source, the strain is capable of transforming the insoluble potassium in the aluminosilicate in the soil into a soluble component in the processes of growth and propagation, and promoting the decomposition of the insoluble potassium to increase thesource of the phosphorus in the soil. In addition, the strain further has an effect of fixing nitrogen, and provides the necessary nitrogen for the growth and metabolism of a plant.

The invention discloses a gas production drug for an automobile safety belt pretensioner. The gas production drug consists of the following components in percentage by mass: 28-42% of a combustible agent, 3-10% of an adhesive, 43-68% of an oxidant and 0.5-5% of a combustion improver. The invention further discloses a preparation method of the gas production drug for the automobile safety belt pretensioner. The preparation method comprises the following steps: adding the combustible agent, the adhesive, the oxidant, the combustion improver and a solvent into a kneading machine to be kneaded into drug rolls, then extruding the drug rolls into drug strips by adopting plunger-type extrusion, airing the drug strips, cutting the aired drug strips into drug granules, screening the drug granules, removing the damaged drug granules and powder to obtain integrated and uniform drug granules, and finally drying so as to obtain the gas production drug. The composition of the gas production drug meets the requirement of gas production pressure of a mini-type gas generator, the output performance is stable, and the 'quality degradation' phenomenon is avoided.

The invention discloses a cobalt-nitrogen-carbon core-shell hybridization hollow porous carbon sphere preparation method which includes the steps: firstly, taking a cobalt precursor sphere and nitrogenous polymer monomer as raw materials, wrapping the surface of the cobalt precursor sphere with nitrogenous polymer by in-situ polymerization to obtain a Co@ nitrogenous polymer composite microsphere; secondly, annealing the prepared Co@ nitrogenous polymer composite microsphere in argon atmosphere to obtain a cobalt-nitrogen-carbon core-shell hybridization hollow porous carbon sphere. The cobalt-nitrogen-carbon core-shell hybridization hollow porous carbon sphere is provided with a porous structure and has a nano-scale particle size, high conductivity and excellent catalytic property. The method is simple and can be widely used for the electrochemical fields of super-capacitors, lithium ion batteries, electro-catalysis and the like, and the process is easily controlled.

The invention belongs to the technical field of the mesoporous material preparation, and relates to a nitrogen-doped ordered mesoporous carbon-loaded nano-palladium material and a preparation method thereof. The material has a three-dimensional cubic mesostructure, a large specific surface area (100-200 m2/g), a large pore volume (0.1-1.0 cm<3>/g), and a uniform pore diameter (2-3 nm), the nitrogen content is controlled to be 9 wt%, the size of the palladium nanoparticles is uniform and controllable (0.1-2 nm), and the palladium content is controlled to be 0.2-5 wt%. The preparation method comprises the following steps: mixing and stirring a pre-synthesized low-grade phenolic resin and a F127 aqueous solution at a certain temperature for 14-16 h, then performing low concentration hydrothermal treatment for 24 h, performing vacuum drying for 12 h, performing calcination on the material together with a nitrogen-containing small molecule under the nitrogen protection to obtain a brown powder, performing immersion in a palladium chloride ethanol solution, and performing the mixed reduction of hydrogen and nitrogen to obtain the ordered mesoporous carbon material-loaded palladium catalyst. The prepared material can be used in the selective hydrogenation reaction of phenol, cinnamaldehyde and the like. The preparation method of the catalytic material is simple, the cost is low, and the equipment requirements are simple and convenient.

The invention discloses a gas producing chemical for an automobile air bag gas generator. The gas producing chemical is prepared from the following components by mass percent: 50% to 63.2% of combustible agent, 0.1% to 5% of adhesive and 35% to 50% of oxidant; the oxidant is one of potassium perchlorate and potassium nitrate or a mixture of the two in any proportion; the problem that an ammonium nitrate gas generation chemical is easy to air-slake is solved. The invention also discloses a preparation method of the gas producing chemical for the automobile airbag gas generator; the preparationmethod comprises the following steps: weighing the combustible agent, the adhesive and the oxidant according to the above proportion, dispersing in a solution, adding into an efficient wet mixing machine for mixing evenly, cutting into small particles, then performing size stabilization by adopting a swing type granulator, spreading granules flatly on a chemical plate, and finally adding an auxiliary additive into the dried granules and pressing by a rotary tablet press to form tablets, wherein the mass of the added auxiliary additive is 0.1% to 0.5% of the mass sum of the combustible agent, the adhesive and the oxidant.

The invention provides a cored wire containing iron alloys and a silicon-calcium alloy and an application thereof. The cored wire comprises a core and an outer layer wrapping the core, wherein the core is a mixture containing a vanadium-iron alloy, iron-silicon nitride, the iron alloys and the silicon-calcium alloy; the iron alloys are a titanium-iron alloy and/or a niobium-iron alloy. The invention provides molten steel and a preparation method thereof. The method comprises the step of feeding the cored wire into the molten steel to be subjected to vanadium-nitrogen alloying to carry out vanadium-nitrogen alloying. The invention provides microalloyed steel. The cored wire is used for achieving vanadium-nitrogen alloying of the molten steel, can effectively increase the nitrogen content according to the requirements, without affecting the vanadium content, and can produce vanadium-containing steel with higher nitrogen content according to the requirement of the molten steel. The vanadium-nitrogen microalloyed steel obtained after casting the vanadium-nitrogen alloyed molten steel obtained by carrying out vanadium-nitrogen alloying on the molten steel by adopting the cored wire has high yield strength, and the relative corrosion rate of steel can not be affected.

The invention provides a preparation method of a difunctional electrocatalyst. The preparation method comprises the following steps: mixing FeCl3.9H2O, CoCl2.6H2O and NiCl2.6H2O with black polypyrrole powder, freeze-drying, and annealing at 800 DEG C to obtain the difunctional electrocatalyst. The catalyst prepared by the method is used in an OER/ORR reaction, has excellent catalytic performance, is simple in preparation process, has low requirements on equipment and process conditions, and is beneficial to popularization and application. The air positive electrode provided by the invention is applied to the zinc-air battery, and has excellent charge-discharge performance and cycling stability.