37 results about "DEPOSIT CALCIUM" patented technology

PCT No. PCT/US97/04957 Sec. 371 Date Mar. 24, 1999 Sec. 102(e) Date Mar. 24, 1999 PCT Filed Mar. 25, 1997 PCT Pub. No. WO97/36989 PCT Pub. Date Oct. 9, 1997Bleach compositions comprising a percarbonate bleach and an amino tricarboxylic acid exhibit a reduced tendency to deposit calcium carbonate insolubles on substrates being bleached. Laundry compositions comprising percarbonate bleach and methyl glycine diacetic acid are provided.

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 solution obtained 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, maintenance is 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 in nature; 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 and good in stability.

A biaxially textured crystalline layer formed on a substrate 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 comprises 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 provides a method for directly extracting vanadium from vanadium-titanium magnetite concentrate. The method comprises the steps: a method for directly extracting vanadium from vanadium-titanium magnetite concentrate comprises the steps: sodium sulfate is added into vanadium-titanium magnetite concentrate, and pellet fabrication is carried out after the sodium sulfate and the vanadium-titanium magnetite concentrate are mixed evenly; pellets which are obtained in pellet fabrication go through the high-temperature sodium oxide roasting; the roasted pellets are milled into powders and then are leached and washed by water; the leaching liquid is purified to collect vanadium to obtain vanadium solution; calcium chloride is added into the obtained vanadium solution to deposit calcium vanadate. The method can circularly utilize purified raffinate to avoid the generation of the waste water containing ammonia nitrogen, and can save the water and reduce the energy consumption.

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 present invention is the bionic process of preparing bioactive calcium phosphate layer on the surface of medical Ni-Ti memory alloy. The preparation process includes ultrasonic cleaning of medical Ni-Ti alloy with acetone, alcohol and distilled water successively; surface activation, and two-step bionic deposition of active calcium phosphate layer to form active calcium phosphate layer in two-layer structure on the surface of Ni-Ti alloy. The active calcium phosphate layer comprises transitional compact non-crystalline calcium phosphate layer of 1-10 micron thickness and porous octacalcium phosphate or surface bone-like crystalline apatite layer of 10-100 micron thickness. During the surface activation, boiling H2O2 aqua of 10-60 concentration is first used for treatment of 10-90 min, and NaOH aqua of 1-10 M concentration at 30-80 deg.c is then used for soaking after flushing for 6-48 hr.

A method of coating a substrate wherein the crystallinity of a calcium phosphate substance in a coating material is controlled, the calcium phosphate substance is loaded with a therapeutic agent, and the loaded calcium phosphate is deposited onto at least a portion of the substrate.

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 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 relates to a wet separation technology for a material containing lead, bismuth and molybdenum, belonging to the technical field of nonferrous metallurgy. The material containing lead, bismuth and molybdenum provided by the invention comprises the following steps of: firstly carrying out ball milling on the material containing lead, bismuth and molybdenum, pulping by adding pure alkaline and an oxidant, and leaching out a pulping material liquid by heating, so that molybdenum exists in a leaching liquid in the form of sodium molybdenum, and lead bismuth silver copper iron slag is formed for lead, bismuth, silver, copper and iron remaining in leached slag; dissolving lead by hydrochloric acid deposition part of leachate, forming lead slag, smelting and recycling by a lead fire method, then adding calcium chloride, and depositing calcium molybdate; leaching out the lead bismuth silver copper iron slag by sulfate, sodium chloride and hydrogen peroxide, and separating Pb in the form of silver and lead slag; and depositing the bismuth in the liquid after lead deposition through hydrolysis, thus the separation of lead, bismuth and molybdenum is realized. According to the invention, the metal recovery rate is high, the separation effect is good, the waste liquid is recycled, no waste slag is produced, and the technology is environmentally-friendly and safe.

A solution for depositing calcium phosphate layer on bone implantation material is a deionized one containing calcium chloride, sodium dihydrogen phosphate and sodium hydrogen carbonate. Its depositing process includes grinding and washing Ti matrix, surface treating in NaOH solution at 20-200 deg.C for 24-48 hr, washing, and depositing in said solution at 30-40 deg.C for 20-24 hr. Its advantage is short period.

A method of coating a substrate including loading a calcium phosphate substance at a first crystallinity with a therapeutic agent; depositing the loaded calcium phosphate substance at the first crystallinity onto a least a portion of the substance; loading a calcium phosphate substance at a second, lower, crystallinity with a therapeutic agent; and depositing the loaded calcium phosphate substance at the second crystallinity onto the deposited loaded calcium phosphate substance at the first crystallinity to control and sustain a long-term osseointegration response and to control the release rate of the therapeutic substance from the calcium phosphate substance.

Disclosed are compositions of bone precursor cells and methods for their preparation and use. Bone precursor cells are cells which are not hematopoietic and which can differentiate into osteoblasts upon exposure to a bone growth factor and deposit calcium into the extracellular matrix. Such bone precursor cells are useful in the treatment of certain bone related disorders and diseases, such as osteoporosis, or in promoting fracture repair. In addition, methods of differentiating bone precursor cells into osteoblasts, and other diagnostic and even prognostic methods are provided.

The present invention relates to a process for depositing a calcium getter thin film inside a system operating under vacuum. The process comprises the steps of introducing into the system under vacuum at least one evaporable getter device with an air-stable calcium compound. The system is evacuated until a pressure value P₁ is reached. The system is then heated up to the calcium evaporation temperature of the stable compound. The system evacuation continues until a pressure value P₂, which is lower than P₁, is reached and the system is sealed. In a preferred embodiment, the heating step separates the two evacuation steps.

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 beta, and Angiopoietin-1. In addition, the immortalized vascular pericyte line has ability to deposit calcium on matrix by dense culture.