37 results about "DEPOSIT CALCIUM" patented technology

The invention relates to a method for preparing superfine fiber bone materials of an electrodeposition calcium phosphate mineralized layer, which comprises the following steps: firstly, high-polymer superfine fibers are prepared on the surface of a metal electrode by adoption of electrostatic spinning and taken as an electrochemical deposition template; a layer of bone salt ingredients which are rich in calcium and phosphor is deposited on the surface of the fibers by the constant-voltage or constant-current deposition technology; mineralized superfine fibers are soaked into 0.1 to 1.0 mol per liter of NaOH solution for 1 to 24 hours; mineralized electro spinning fibers are subjected to die stamping into blocks under the pressure of between 10 and 40 MPa; and the porous bone materials with a porosity between 50 and 90 percent and a pore diameter between 50 and 500 micrometers are processed by the salt particle leaching / gas foaming technology, and are used for bone defect restoration after freeze-drying sterilization. The porous bone materials prepared by the method have better biocompatibility; and the electrochemical deposition technology can prepare organic-inorganic composite materials with higher bone salt content within a shorter period; and the preparation time is short and the preparation conditions are mild.

The invention discloses a microorganism curing kit and a calcareous sand in-site curing method, and belongs to the field of geological engineering and microorganism interdisciplines. The microorganismcuring kit is used for calcareous sand in-site curing and comprises a first component containing carboxylic acid, a second component containing microorganisms capable of generating urease, and a third component containing urea and a nutrient solution. The calcareous sand in-site curing method comprises the step that calcareous sand is partially dissolved by the first component. A calcium source can be efficiently obtained from sandy soil of an in-situ area or a nearby area of a calcareous sand soil body and then reacts with the microorganisms to deposit calcium carbonate, and the in-situ curing effect is realized.

A biaxially textured crystalline layer formed on a substrate using ion beam assisted deposition (IBAD) is provided. The biaxially textured crystalline layer includes an oriented CaF2 crystalline layer having crystalline grains oriented in both in-plane and out-of-plane directions, where the out-of-plane orientation is a (111) out-of-plane orientation. The oriented CaF2 crystalline layer is disposed for growth of a subsequent epitaxial layer and the CaF2 crystalline layer is an IBAD CaF2 layer. The biaxially textured CaF2 layer can be used in a photovoltaic cell, an electronic or optoelectronic device, an integrated circuit, an optical sensor, or a magnetic device.

The invention relates to a method for preparing a paper-making coating-grade precipitated calcium carbonate pigment, which is especially suitable for use as a coating pigment for high-grade coated paper, white cardboard, and light-weight (low-weight) coated paper, and belongs to the technical field of refining chemical raw materials . The present invention uses precipitated calcium carbonate dry powder as raw material, adds precipitated calcium carbonate to water in batches under high-speed dispersion conditions to adjust slurry, and obtains precipitated calcium carbonate with a solid content between 65% and 75% after multi-channel grinding. Papermaking coating grade precipitated calcium carbonate pigment with a ratio greater than 90% and a viscosity less than 300 centipoise (cps). The invention can effectively solve the agglomeration problem in the dispersion process of the precipitated calcium carbonate, improve the viscosity index of the precipitated calcium carbonate, and obtain high-concentration pigment for doctor blade coating.

The invention discloses a method for repairing cement-based material cracks, as well as a culture solution and a repair nutrient solution. The method for repairing cement-based material cracks by through microorganisms comprises the following steps that: a Bacillus pasteurii strain is inoculate onto a culture medium provided with a urea-containing substrate; shake cultivation is carried out at a temperature of between 25 and 37 DEG C, and then a culture bacteria solution is taken out and centrifuged and has supernatant fluid removed; strain cells are collected through the culture solution; the concentration of the strain cells is controlled in a range of between 2x10<9> and 1x10<11> cell / ml; standard sand, urea and Ca(NO3)2.4H2O mixture are added to each milliliter of strain cell solutionobtained through collection, mixed, stirred into slurry and injected into cement stone cracks; the frequency of the repair nutrient solution injection is not less than two times; finally, maintenanceis carried out. In the culture solution, each liter of culture solution contains 4 to 6 g of peptone, 2 to 4 g of beef extract and 20 to 60 g of urea. The method fully utilizes microbial resources innature; CO3<2-> decomposed out through microbial enzyme can chelate Ca<2+> in a substrate so as to be mineralized and deposit calcium carbonate, and is close in the combination with the substrate andgood in stability.

The invention discloses a microbial solidification kit and a method for in-situ solidification of calcareous sand, belonging to the interdisciplinary field of geological engineering-microbiology. A microbial solidification kit of the present invention is used for in-situ solidification of calcareous sand, comprising: a first component containing carboxylic acid; a second component containing microorganisms capable of producing urease; a third component containing urea and nutrient solution components. The method for in-situ solidification of calcareous sand by microorganisms includes the step of partially dissolving the calcareous sand by using the above-mentioned first component. The present invention can efficiently obtain calcium source in the in-situ calcareous sandy soil or in the sandy soil in the nearby area, and then react with microorganisms to deposit calcium carbonate to realize the in-situ solidification effect.

The invention discloses a preparation method of a bionic shell material, and belongs to the technical field of bionic structural mechanics materials. The preparation method comprises the following steps of (1) carrying out construction of brick-wall structure by using modeling software; (2) taking a photosensitive resin as a raw material, adding a diluent and a photoinitiator, and printing an organic framework of a shell structure by adopting micro-nano 3D printing equipment; (3) depositing calcium carbonate in the printed organic framework by adopting an in-situ precipitation method to obtainthe organic framework for depositing calcium carbonate; and (4) carrying out hot pressing on the organic framework deposited with the calcium carbonate by virtue of a hot pressing method to obtain the bionic shell material. The preparation method is simple in process, the prepared bionic shell material is good in uniformity, the strength and fracture toughness property of the prepared bionic shell material are close to that of the shell material, the bionic shell material has very practical value in the fields of mechanical engineering, aerospace, bullet-proof armor and the like.

The invention relates to the fields of electrochemistry and materials and discloses a method for preparing a carbonate hydroxyapatite / carbon nano tube composite coating, which mainly comprises the following two steps: (1) depositing calcium carbonate powder or calcium carbonate-containing powder and carbon nano tubes on the surface of a metal matrix to obtain a calcium carbonate powder / carbon nano tube coating by electrophoretic deposition; and (2) treating the calcium carbonate powder / carbon nano tube coating with a phosphoric acid buffer solution, and converting the treated solution into the carbonate hydroxyapatite / carbon nano tube composite coating. The method is executed at normal temperature and pressure, has the advantages of simple process, low equipment investment and the like, and is suitable for preparing implants of various complicated shapes. The obtained composite coating has the fine bioactivity of the carbonate hydroxyapatite, and also can give full play to the favorable mechanical properties of the carbon nano tubes and the metal matrix.

The present invention relates to an orthodontic wire for orthodontic treatment, in particular to an orthodontic wire with a calcium-phosphorous bioceramic coating on the surface with good biocompatibility and a preparation method thereof. The metal matrix of the orthodontic wire There is a layer of calcium phosphorus bioceramic coating with good biocompatibility on the surface. The calcium phosphorus bioceramic coating has a double-layer structure, that is, an amorphous bottom layer of calcium phosphate and bone-like phosphorous ash in contact with the metal matrix of the tooth correction wire. The surface layer of the stone crystal phase is composed of the calcium phosphate amorphous bottom layer with a thickness of 1-10 μm; the bone-like apatite crystal phase surface layer with a thickness of 10-50 μm. The preparation method is as follows: firstly process the tooth-orthopedic wire with nickel-titanium memory alloy or stainless steel; carry out surface activation treatment on the tooth-orthopedic wire, and then obtain a calcium phosphate amorphous bottom layer and A calcium-phosphorus bioceramic layer composed of bone-like apatite crystal phase surface layers in sequence.

To provide an immortalized capillary pericyte line which maintains the original function / property of the cell line-deriving tissue, its establishment method, and the screening method for useful substance using the immortalized capillary pericyte line. Cerebral tissue of a transgenic rat carrying the large T antigen gene of SV40 thermo-sensitive mutant line tsA58 is homogenized and the resultant brain capillaries are treated with protease, thus obtained brain capillary cells are subcultured to establish an immortalized cell that expresses SV40 thermo-sensitive large T antigen, PDGF receptor β, and Angiopoietin-1. In addition, the immortalized vascular pericyte line has ability to deposit calcium on matrix by dense culture.

The invention relates to a method for co-production of a chemical synthetic fertilizer by industrial calcium products, and belongs to the field of production of agricultural fertilizers. The method comprises the following steps: preparing phosphorite powder into ore pulp by using a raw material slurry method, reacting the ore pulp with nitric acid, and filtering; feeding filter residues to a compound fertilizer workshop to produce a nitrohumic acid compound fertilizer; adding sodium nitrate in the filtrate to remove fluoride; centrifugally dehydrating; drying the filter residues to prepare sodium fluosilicate; adding ammonium sulfate, potassium sulphate or potassium carbonate in the filtrate to deposit calcium; then filtering; preparing the industrial calcium products from the filter residues; and neutralizing, concentrating, guniting, drying, cooling, enveloping, metering and packing the filtrate to obtain the chemical synthetic fertilizer.

The invention discloses a magnesium-based tissue engineering material antibacterial coating and a preparation method thereof. The coating includes a bioactive calcium-phosphorus coating and a nano-metal compound antibacterial coating on the surface of the porous magnesium and magnesium alloy materials from the inside to the outside; during preparation, the porous magnesium-based material is placed in a solution containing calcium phosphate salt Soaking, chemically depositing a bioactive calcium-phosphorus coating; then placing the porous magnesium-based material deposited on the calcium-phosphorus layer in a constant temperature and dynamic immersion reaction in a metal compound solution, and preparing the above-mentioned nanometer metal compound antibacterial coating on the surface of the outer layer of calcium-phosphorus layer, namely have to. The coating prepared by the invention not only significantly reduces the corrosion rate of the matrix porous magnesium and magnesium alloy, but also improves the surface biological activity of the matrix, can promote osteogenesis and angiogenesis, and has high-efficiency broad-spectrum antibacterial effect. The operation process is simple and easy, the prepared coating has strong binding force with the substrate, and the surface density and particle size of the nanometer metal compound carried can be adjusted.

When fly ash is added to a cement kiln to materialize it after being desalinated by washing, scale is prevented from growing in a dissolution reaction apparatus depositing calcium-containing compounds dissolved in slurry, and the fly ash is effectively used as a cement material. A dissolution reaction apparatus according to the invention comprises: a dissolution tub 3 for dissolving powder material, a wet dust collector 5 for collecting powder material and mist while reacting slurry S in the dissolution tub 3 with gas G and returning the collected powder material and mist to the dissolution tub 3. A second wet dust collector 7 can be provided for collecting powder material and the like accompanying to the gas G discharged from the wet dust collector 5, and both the wet dust collectors 5, 7 can be vertical type and mounted independently with each other on the dissolution tub 3. The slurry S and the gas G can react with each other with parallel flow by feeding the slurry S and the gas G to an upper portion of the first wet dust collector 5, or the powder material and the like accompanying to the gas G may be collected with counter flow by feeding the gas G discharged from the dissolution tub 3 to a lower portion of the second wet dust collector 7.

The invention relates to a construction method for high-pressure spraying microbial bacterial liquid to deposit calcium carbonate to treat landslides. The plan includes the following construction steps: cleaning the slope surface of a potential landslide body, and arranging an operation platform; Drilling to form a plurality of liquid injection holes; inserting a steel flower tube closed at the bottom into each liquid injection hole; injecting microbial bacterial liquid into each steel flower tube; elevating the steel flower tube according to the set speed until it is lifted to a soft sliding Stay at the surface for a set time and then continue to lift the steel flower tube; stop the microbial injection when the bottom elevation of the steel flower tube exceeds the weak sliding surface elevation by at least 1m; pull out each of the steel flower tubes, wait for the bottom of each injection hole. After the microbial deposition of calcium carbonate is completed, microbial bacterial liquid injection and soil filling are performed in each liquid injection hole again. The invention has the advantages of reducing the damage to the mountain and the ecological environment, and has the advantages of fast construction speed and low construction cost.

When fly ash is added to a cement kiln to materialize it after being desalinated by washing, scale is prevented from growing in a dissolution reaction apparatus depositing calcium-containing compounds dissolved in slurry, and the fly ash is effectively used as a cement material. A dissolution reaction apparatus according to the invention comprises: a dissolution tub 3 for dissolving powder material, a wet dust collector 5 for collecting powder material and mist while reacting slurry S in the dissolution tub 3 with gas G and returning the collected powder material and mist to the dissolution tub 3. A second wet dust collector 7 can be provided for collecting powder material and the like accompanying to the gas G discharged from the wet dust collector 5, and both the wet dust collectors 5, 7 can be vertical type and mounted independently with each other on the dissolution tub 3. The slurry S and the gas G can react with each other with parallel flow by feeding the slurry S and the gas G to an upper portion of the first wet dust collector 5, or the powder material and the like accompanying to the gas G may be collected with counter flow by feeding the gas G discharged from the dissolution tub 3 to a lower portion of the second wet dust collector 7.