118 results about "Atherion elymus" patented technology

The invention discloses a coated fertilizer for inducing root growth and a preparation method and an application thereof, belonging to the field of fertilizer industry. The coated fertilizer comprises a fertilizer core and a coated layer, wherein the fertilizer core comprises organic matters, compound amino acid, humic acid materials, macroelements, secondary elements, microelements and an inorganic conditioner, the coated layer comprises a binder, a coated agent, a root system inducer, an alginate solution and a calcium ion solution. The preparation method comprises the following steps of smashing raw materials of the fertilizer core, after mixing, tabletting so as to form granulated fertilizer, spraying the binder, the coated agent mixed with the root system inducer, the alginate solution and the calcium ion solution on the granulated fertilizer sequentially so as to form a coated layer, and obtaining the coated fertilizer for inducing root growth after drying. On the one hand, the coated fertilizer can induce the root system to grow rapidly around the fertilizer due to the addition of the root system inducer, so that the fertilizer use ratio is improved; on the other hand, the fertilizer core is extruded and bonded by adopting a physical manner, so that the slow-release effect of the fertilizer core guarantees the fertilizer to be used efficiently.

The invention discloses a graphene sponge used for enriching heavy metals or removing pollutants in water and a preparation method of the graphene sponge. The preparation method comprises the following steps: ultrasonically uniformly mixing oxidized graphene and a sodium alginate solution with a mass ratio of 1:0.1-1:10, adding an alkaline substance to adjust a pH value to be 8-10; sealing at the temperature of 60-150 DEG C to perform heating reaction for 0.5h-10h to obtain graphene hydrogel; and adding a calcium ion solution in the obtained graphene hydrogel, washing respectively with acid and water, and then drying to obtain a target product. According to the preparation method, the preparation process is simple, the raw material ingredients are relatively simple and are easily available, secondary pollution is avoided, the popularization is easy, and large-batch production can be performed; the prepared graphene sponge is relatively disperse and porous, and is large in specific surface area so that the adsorption capacity to the pollutants is increased. The problem that solid-liquid separation is difficultly performed by adopting a nanometer adsorbing agent is solved. The graphene sponge can be used for adsorbing organic pollutants and heavy metal ions in water, and can also be used for enriching trace heavy metals in water.

The invention relates to a detection technology of copper ions, and in particular relates to a preparation method of a reduced carbon quantum dot containing calcium alginate gel for detecting copper ions. The preparation method of the carbon quantum dot containing calcium alginate gel for detecting the copper ions comprises the following steps of: preparing fluorescent carbon quantum dots; neutralizing the fluorescent carbon quantum dots, adding sodium borohydride into the neutralized fluorescent carbon quantum dots to perform reduction; mixing deionized water with the neutralized fluorescent carbon quantum dots at equal volume, and adding sodium alginate into the mixture to obtain a sodium alginate sol; and spraying a calcium ion solution to the surface of the sol or soaking the sol into the calcium ion solution to perform crosslinking, and drying to obtain the calcium alginate gel. By using the characteristics that the carbon quantum dots have fluorescent characteristics, the fluorescence of the carbon quantum dots is enhanced after reduction, and the calcium alginate can enhance the fluorescent characteristics of the carbon quantum dots, when the copper ions are detected, the cost of an adopted fluorospectro photometer is low, the sample preparation and treatment steps are simple and easy to operate, and the detection sensitivity is high, so that the calcium alginate gel can be widely used for detecting the copper ions.

The invention provides a new method of under the normal temperature and ordinary pressure preparing the shell glycan/the oxhydryl-apatite nano complex materials. The method includes: at first make up the calcium-ion solution and the phosphor-ion solution, then evenly mix the calcium-ion solution with the phosphor-ion solution and add the acetic acid into the mixture to form the solution, then dissolve the shell glycan into this solution, then inject the solution containing the shell glycan into the mould to shape and dry it. Adopting the method of the invention can assure that the particles of the oxhydryl-apetite disperse in the shell glycan base body at the nano measurement (20-100 nm), and the materials made by using the invention's method are transparent and yellowish, and their mechanical property obviously is improved.

The invention provides a method for preparing calcium carbonate by using catalysis of microbial carbonic anhydrase, which comprises the following steps of: adding the carbonic anhydrase extracted from a microbial culture into a liquid system containing calcium ion and bicarbonate radical ion solution or a gas diffusion system containing calcium ion solution and releasing CO2 by using ammonium hydrogen carbonate solution, performing oscillating reaction at room temperature, controlling initial pH at 5 to 10, taking out the produced sediment, and performing filtration, washing and drying to obtain the calcium carbonate. The method makes full use of microbial resources and characteristics of specificity and high efficiency of enzyme catalytic reaction, prepares the calcium carbonate by accelerated deposition, and has the advantages of riche resources, simple process, clean environment, low cost, high efficiency, quickness and the like. The calcium carbonate prepared by deposition has high purity, is calcite crystal calcium carbonate, can be used as an industrial filler, and can also be used for repairing cracks of building engineering, buildings, stone landscapes and carved stone cultural relics.

The invention discloses a method for preparing light calcium carbonate and magnesium oxide from dolomite. The method comprises the following steps: firstly, calcining and slaking the dolomite to obtain a slaking liquid, converting calcium hydroxide in the slaking liquid to a soluble calcium ion solution through a phase-transfer reaction, meanwhile filtering out magnesium hydrate filter cakes containing impurities, feeding CO2 into the soluble calcium ion solution, precipitating and separating to obtain calcium carbonate and a filter liquor, pulping and carbonizing the magnesium hydrate filter cakes containing impurities to obtain a magnesium bicarbonate solution, then performing a pyrolytic reaction to obtain basic magnesium carbonate, and calcining to obtain light magnesium oxide. The method is simple in technical process and low in energy consumption without strong acid to leach and addition of an impurity removing precipitator, the calcium and magnesium separation effect is good, a common carbonization liquid-solid-gas three-phase reaction is avoided, the reaction condition is easily controlled, and prepared light calcium carbonate accords with demands of national corresponding product standard and lays research basis for industrial scale production.

A mineralized porous silk protein/high-molecular material composition with high biocompatibility and biodegradability for repairing bone is prepared through preparing the aqueous solution of deglued silk protein, dropping the Ca ions contained solution in it while stirring, slowly dropping PO4 ions contained solution, regulating pH value, stirring, laying aside, centrifugal separation and washing several times, vacuum drying, grinding, and mixing with the biocompatible high-molecular material chosen from polylactic acid, copolymer of lactic acid and hydroxy acetic acid, sodium alginate, etc.

A mineralized silk protein for inducing growth of bone is prepared through preparing water-soluble deglued silk protein, adding Ca ions contained solution to its solution while stirring, slowly adding PO4 ions contained solution, regulating pH value, stirring, laying aside, centrifugal separation-washing several times, and vacuum drying.

The invention discloses a preparation method of hydroxyapatite. The preparation method comprises the following steps of crushing waste sea shells to obtain shell powder, dissolving the shell powder in an acidic solution to obtain a calcium ion solution having a concentration of 0.01-0.5mol/L, mixing the calcium ion solution and a phosphate aqueous solution according to a mole ratio of calcium to phosphorus of 5: 3 to obtain a mixed solution, adjusting a pH value of the mixed solution to 8-10 by ammonia water, putting the treated mixed solution into a reactor, and carrying out a hydrothermal reaction process at a temperature of 100-200 DEG C for 2-12h to obtain hydroxyapatite. The preparation method of the hydroxyapatite can effectively solve the problem that the amount of a calcium salt reagent is limited and cannot satisfy hydroxyapatite clinical demand. The invention also provides the hydroxyapatite.

The invention relates to a method for improving the hemostatic effect of external-use zeolite hemostat by calcium ion modification, comprising the steps of using 5A zeolite, 4A zeolite, 3A zeolite, combined Y zeolite, synthesized mercerizing zeolite, synthesized 13x zeolite and synthesized beta-zeolite as the materials, grinding the materials into particles with the grain diameter of 1 micro to 1 mm with a traditional Chinese medicine grinder, mixing the grinded zeolite and the calcium ion solution in which the concentration of the calcium ion is 0.1-10 mol/L in the solid-to-liquid ratio of 1 g:10 ml, reacting for 3-6 h at a temperature of 60-120 DEG C, washing till no calcium ion is available in the eluate, and then drying at a temperature of 60-200 DEG C to obtain the external-use zeolite hemostat with better hemostatic effect.

The invention discloses a dust suppressing agent prepared on the basis of microorganisms and a use method thereof. The microorganism dust suppressing agent is prepared by mixing a bacterium solution and a calcium-ion solution by proper matching ratio. The use method of the dust suppressing agent comprises the following steps: the dust suppressing agent is uniformly sprayed on the surfaces of raise dusts; according to the actual need, the used amount of the dust suppressing agent for treating the raise dusts with the stacking volume being 1m<3> is 300-400L, and the 1-3 treating times are carried out according to the effect need. The dust suppressing agent has the advantages that the dust suppressing effect is obvious, the evaporative resistance, the wind-erosion resistance and the durability are respectively and greatly superior to those of the sprinkling mode for suppressing dusts when in raise-dust treatment, the greenhouse gas CO2 is absorbed in the reaction process, no toxic and harmful substance is generated, and the environmental friendliness and the economy are good.

The invention discloses a preparation method for light calcium carbonate by using a phase transfer-carbonization method. Firstly, crude quicklime slurry is converted into a soluble calcium ion solution through a phase transfer reaction. Then, CO2 gas is fed into the soluble calcium ion solution and the calcium carbonate is obtained by precipitation and separation. According to the preparation method, in a phase transfer reaction process, calcium in the crude slurry is transferred into a liquid phase in forms of calcium ions, thereby achieving effective separation of the calcium ions from insoluble impurities in the crude slurry. The preparation method has advantages of simple technology, low production cost, high purity and uniform shapes and appearances of the CaCO3 produced, and the like. The preparation method can be applied for industrial production.

This invention discloses a method for coating carbon nanotubes (CNTs) with hydroxyapatite. The method comprises: (1) refluxing CNTs in a strongly oxidative acid at 100-140 deg.C, then washing to neutrality, drying, and milling; (2) dispersing oxidized CNTs by ultrasonication with anionic surfactant as the dispersant to obtain 0.2-1 g/L suspension; (3) preparing Ca(NO3)2 solution and (NH4)2HPO4 solution; (4) slowly adding Ca(NO3)2 solution into the suspension, adjusting the pH value to 10-13 with ammonia solution, dispersing by ultrasonication, and transferring into a reactor; (5) slowly adding (NH4)2HPO4 solution into the reactor at a (NH4)2HPO4/ Ca(NO3)2 mol ratio of 3:5, aging at 10-80 deg.C, washing the precipitate and drying to obtain the product. The method is easy to operate and can realize intimate bonding of CNTs and hydroxyapatite.

The invention provides a novel gamma-polyglutamic acid/hydroxyapatite composite material and a preparation method thereof. The method comprises the following steps of: preparing calcium ion and phosphorous ion solutions; adding a gamma-polyglutamic acid solution into the calcium ion solution to react; dropwise adding the phosphorous ion solution; and preparing the composite material by virtue of stirring, aging, compression molding and lyophilizing. The invention is a novel method of preparing the novel gamma-polyglutamic acid/hydroxyapatite composite material by adding gamma-polyglutamic acid into hydroxyapatite by virtue of an in-situ polymerization method. The novel gamma-polyglutamic acid/hydroxyapatite composite material prepared by the method of the invention is transparent oyster white with bending strength of 135.0MPa and remarkably improved mechanical performance. The composite can guarantee that: calcium ions and phosphorus ions in the hydroxyapatite in a bone repairing process are released from the gamma-polyglutamic acid constantly, smoothly and slowly, the bone bonding capability of the hydroxyapatite composite material can be improved, and bone defect repairing is promoted.

The present invention provides a remineralizing material for use on a demineralized enamel surface and a preparation method thereof; the remineralizing material is prepared through the following steps: using carboxymethyl chitosan of certain concentration to stabilize hydrogen phosphate ions in supersaturated ionic solution with hydrogen phosphate and calcium ions in supersaturated calcium-containing ionic liquid, so as to form nano amorphous calcium phosphate particles, and adding sodium hypochlorite solution of certain concentration and glycine into sodium hypochlorite solution of certain concentration to obtain the remineralizing material. The demineralized enamel oriented ordered mineralizing material described herein has reasonable structural design, is simple to prepare and can transform quickly into crystal and specifically binds and firmly binds with the demineralized enamel surface; arranging newly-formed hydroxyapatite in a certain direction in order; the material is nontoxic and nonirritating, has good biocompatibility and low allergicity and has ideal result.

The invention relates to a simple method for preparing hydroxyapatite nanocrystals, comprising the following steps: preparing the hydroxyapatite nanocrystals through one-step reaction of calcium ion solution in a buffer solution system (PH=7-14) containing phosphate anions under one atmospheric pressure and at the temperature of 10-40 DEG C. The preparation method does not need special device nor special reaction condition nor heating nor calcining nor adding organic substrate as dispering agent or stabilizing agent. The method has the characteristics of simple technology, low energy consumption, high yield, environmental protection, and the like, and is applied to large-scale industrial production.

The invention discloses a preparation method of a composite hydrogel for adsorbing and detecting heavy metal ions, and belongs to the field of high polymer materials. The composite hydrogel is a calcium alginate/attapulgite/carbon-point composite hydrogel and is prepared by the following steps of (1) adopting calcium alginate and attapulgite as raw materials and forming a calcium alginate hydrogel CA/ATP in a calcium ion solution by means of crosslinking; (2) carrying out modifying treatment on commercially available calcium points by using a coupling agent 3-glycoxyl trimethoxysilane (KH560) to prepare KH560 modified carbon points; (3) immersing calcium alginate hydrogel CA/ATP and the KH560 modified carbon points into a CD-KH560 solution, carrying out light-proof oscillation, washing and freeze-drying in a table concentrator to prepare the composite hydrogel for adsorbing and detecting the heavy metal ions. According to the composite hydrogel, qualitative detection can be effectively carried out on the heavy metal ions in water and the heavy metal ions in the water can be adsorbed.

The invention relates to a method for preparing nano hydroxyapatite. The method comprises the following steps of: dissolving soluble calcium salt in deionized water to obtain a calcium ion solution; dissolving 0.5 to 7mmol of lauryl sodium sulfate and 1 to 5g of polyvinylpyrrolidone in each liter of deionized water to obtain a mixed solution; dissolving soluble phosphate in the mixed solution, adjusting the acidity of a system by using hydrochloric acid and ammonia water to ensure that the pH value of the solution is 8.0 to 11.0, and slowly dripping the calcium ion solution into the mixed solution of the lauryl sodium sulfate, the polyvinylpyrrolidone and phosphate radical ions at a constant temperature to ensure that the molar ratio of Ca to P is 10:6 in a reaction system after the dripping step is finished; and reacting for more than 24 hours, cooling, filtering, washing, drying under vacuum, and thus obtaining a nano hydroxyapatite material. The preparation method provided by the invention is environment-friendly, safe and low in cost and has a simple process; and the obtained nano hydroxyapatite has regular appearance and has important application value in the field of biomedical engineering.

A composite calcium carbonate containing micron spheres of nano particles features that under the chemical action of styrene-acrylic acid copolymer the calcium carbonate nanoparticles are collected to form micron-class big particles, which chemically reacts on the aqueous solution containing Ca ions in the carbonic acid radial's aqueous solution containing said copolymer at 5-4 deg.C for 10-30 min to obtain target product.

The invention discloses a preparation method of a hydroxyapatite/polylactic acid composite material. The technical key point of the invention is that the preparation method of the hydroxyapatite/polylactic acid composite material is characterized by comprising the following steps of: (1) dissolving polylactic acid, a surfactant and a cosurfactant into an organic liquor to prepare an oil phase liquor of polylactic acid; (2) respectively adding a calcium ion liquid and a phosphate anion liquid to the oil phase liquor prepared by the step (1) to prepare a calcium ion emulsion and a phosphate anion emulsion; (3) mixing the calcium ion emulsion and the phosphate anion emulsion to react to form a mixed emulsion of hydroxyapatite/polylactic acid; and (4) volatilizing the organic solvent in the mixed emulsion and removing the surfactant and the cosurfactant to obtain the hydroxyapatite/polylactic acid composite material. The preparation method provided by the invention is characterized in that the composite material is prepared by an emulsion mixing method, and the composite material prepared can be selectively adjusted in proportion to meet different demands.

The invention discloses an ecological restoration method for an abandoned mine. The method comprises the following steps of S1, sampling and testing soil of the mine; S2, searching for a restoration soil source; S3, detecting the soil source, the pH of soil of the soil source and the content of calcium ions; S4, conducting acid mine restoration; S5, conducting alkaline mine restoration; S6, preparing a calcium ion solution; S7, conducting fertilization at regular time, wherein N fertilizer, P fertilizer, K fertilizer and other kinds of fertilizer can be applied at regular time to improve the soil fertility; S8, planting plants; S9, inoculating rhizobia, wherein the rhizobia are inoculated to the leguminous plants during planting; S10, introducing animals, wherein several groups of earthworms are freed in the soil source in the early stage; S11, observing restoration conditions. The restoration method is more scientific and reasonable, the soil activity is improved, improvement is accelerated, the mine restoration cycle is shortened, heavy metal ions in the mine can be enriched, germination and growth of the planted plants can also be promoted, and the structure, water permeabilityand ventilation of the soil can be improved.

The invention discloses fish gelatin/sodium alginate double-network complex hydrogel, a preparation method thereof and an obtained probiotic microcapsule, and belongs to the field of microcapsules. When the fish gelatin and sodium alginate gel as single network gel is used, the disadvantages of poor mechanical performance and stability are shown, and embedding of probiotics is not facilitated so as to cause the problems of low embedding ratio of the probiotics and small protection degree of the probiotics. According to the technical scheme, a sodium alginate solution is prepared and is fully hydrated; the fish gelatin is added into the hydrated sodium alginate solution to obtain a mixed solution; the mixed solution is heated, subjected to induction treatment, and is cooled to obtain a gelmixed solution; the gel mixed solution is added into a first calcium ion solution at constant speed and is molded, and then the molded gel is added into a second calcium ion solution and is hardened.The fish gelatin/sodium alginate double-network complex hydrogel disclosed by the invention can be applied to embedding of the probiotics and has the advantages of high embedding ratio and high survival rate of the probiotics.

A cell 3D printer is disclosed. A shaped cell-containing stent is accurate and clear in shape, and free of stagger among layers. The cell 3D printer is suitable for printing tissue/organs having high shape requirements. According to a technical scheme, the cell 3D printer includes a spray head mixing and spraying a cell-containing gel precursor solution and a calcium ion solution, a material supplying system supplying the spray head with the calcium ion solution, a pneumatic control system controlling spraying action of the spray head, a workbench supporting the cell-containing stent printed and shaped, a liquid discharging system for discharging a liquid accumulated in a tray of the workbench, and a driving system for allowing the spray head to move at the X, Y and Z directions relative to the workbench.

A mineralized genetically recombinant collagen composition for repairing bone is prepared through preparing the solution of genetically recombinant collagen in acid or water, dropping Ca ions contained solution in it while stirring, adding PO4 ions contained solution, regulating pH value, stirring, laying aside, centrifugal separation and washing several times, and freeze drying. It has high biocompatibility.