98results about How to "Stable conditions" patented technology

The invention relates to the field of chemical fibers, in particular to a cellulous fiber, a preparation method thereof and equipment. The cellulose fiber mainly comprises cellulous, is prepared by the solidifying liquid co-current drawing and spinning technology, and meets the following conditions that the tension breakage strength of the fiber is higher than or equal to 2.0cN/dtex, the fineness of the fiber is equal to or smaller than 1.67dtex, the content of S elements in the fiber is smaller than or equal to 100ppm, the fibrillation index (F.I.) of the fiber is smaller than or equal to 2. In addition, the cellulose fiber is free of chemical compositions relevant to fibrillation treatment resistance. The invention further relates to the preparation method of the cellulous fiber and the equipment. The cellulose fiber is high in strength, low in fineness and free of fibrillation tendency, the preparation method is simple, and is easy to control and applicable to large-scale industrialized production, and the equipment is simple in structure, skillful in design and stable in condition.

The invention provides a readily-foaming emulsifying agent. The readily-foaming emulsifying agent consists of the following components in percentage by weight: 60 to 40 percent of surfactant and 40 to 60 percent of wetting and stabilizing agent, wherein the surfactant at least comprises S-80 with high hydroxyl value. The main components and compounded products of the emulsifying agent are dissolved into oil easily; and the emulsifying agent is emulsified with aqueous solution of ammonium nitrate inorganic salt to form a latex matrix, and after the latex matrix is added into aqueous solution of sodium nitrite, bubbles are generated to sensitize the latex matrix into emulsion explosive.

An upper limit detection sensor detects that a top face position of a sheet stack on a tray reaches an upper limit position which enables feeding of sheets one by one by a sheet feeding portion and a lower limit detection sensor detects that the top face position of the sheet stack on the tray reaches a lower limit position which enable feeding of sheets one by one. When the sheet stack is loosened by blowing air against a side face of the sheet stack on the tray with an air spouting nozzle provided on an air loosening device, if a sheet floated by air from the air loosening device exceeds an upper limit position of a feeding enabled range, the lowering amount of the tray is controlled so that at least a sheet next to the sheet to be fed is not lower than a lower end position of the air spouting port of the air loosening device.

The invention belongs to the technical field of new biological veterinary medicaments, and in particular relates to a method for testing the efficacy of a swine fever live vaccine. The efficacy of the live vaccine is evaluated by detecting the virus content of the live vaccine through indirect immunofluorescence (IFA). The method for testing the efficacy of the swine fever live vaccine has the advantages of short test time, simple operation, low cost, accurate obtained result, high repeatability, excellent application value and wide market prospects.

The invention relates to a diffusion zincizing coating method and belongs to the technical field of surface coating techniques of steel materials. The method comprises the steps of precoating the surface of a steel product with a zinc deposition layer according to a traditional mechanical zinc coating method, burying the steel product in anti-oxidation filling and putting in a diffusion coating furnace or an incubator, or applying an anti-oxidation coating on a workpiece with a pre-coated zinc layer, drying and putting in the diffusion coating furnace or the incubator for heat preservation, and allowing zinc iron atoms to diffuse mutually to form a diffusion zincizing layer with a zinc-iron alloy structure. With the adoption of the method, diffusion zincizing uncoating caused by pretreatment and reoxidation can be avoided basically, the quality of the diffusion zincizing layer is ensured, and the yield of a product is greatly improved.

The invention relates to a cell viability detection kit and a preparation method and an application thereof. The invention is applicable to live cell counting, and is a determining method for directly detecting the cell proliferation, and is also a detection method for estimating the cell totoxicity of the drugs, peptide growth factors and other substances, and is applicable to detect the suspended cell and the anchorage-dependent cell cultured in the cell culture plates. The invention consists of a WST-8 mixed solution storage solution, a reaction stop solution and a buffer diluent solution, wherein the WST-8 mixed solution storage solution contains 50mmol/L WST-8 solution, 2mmol/L PMS and 1mmol/L PIPES buffer solution; the reaction stop solution is 10%(W/V) sodium dodecyl sulfate; and the buffer diluent solution is 1mmol/L PIPES solution.

The invention provides a preparation method for a 4-aryl isoquinoline-1,3(2H,4H)-diketone compound. The preparation method comprises the following steps: in a solvent, with imide as shown in a formula(II) which is described in the specification as a raw material, and in the presence of a palladium catalyst, a ligand and alkali, allowing the imide to react with substituted aromatic hydrocarbon asshown in a formula (III) which is described in the specification so as to generate the 4-aryl isoquinoline-1,3(2H,4H)-diketone compound as shown in a formula (I) which is described in the specification. The preparation method provided by the invention has the advantages of stable operation, high yield, low production cost, etc.; preparation of a target object can be completed by a one-step reaction; the operation is simple and convenient; the yield is high and generally reaches 90% to 99%; the use of an expensive and hazardous reagent is avoided; a synthetic method with large-scale preparationvalues is realized; conditions are stable; the yield is high; and a selection for a novel preparation method is provided for development and application of an isoquinoline diketone compound. The preparation method provided by the invention has a synthetic route as described in the specification.

The invention main discloses a casting lipid-type oxidation control process. The casting lipid-type oxidation control process is characterized by adding a pre-treatment process after finishing a casting manufacturing process, wherein the pre-treatment process comprises the following steps of: fully soaking fresh casting in a mixed solution at normal temperature for 8-24h after mixing sodium chloride saturated solution with an antioxidant with mixed three substances, namely vitamin A, vitamin B and vitamin E, according to the mass concentration of 0.01-0.2. The casting lipid-type oxidation control process disclosed by the invention has the advantages of strengthening the oxidation resistance of the casting, reducing the problem of oxidation of casting lipid due to the contact with oxygen during preservation, and providing stable conditions for the preservation of the casting after carrying out the pre-treatment on the casting by utilizing an antioxidation reducing agent.

The invention relates to a triple compound microsphere vascular targeted embolization sustained-release preparation containing an antituberculous drug as well as a preparation method and application of the preparation. The sustained-release agent comprises a carrier and drugs, wherein the drugs are coated with the carrier; the carrier is sodium alginate or chitosan, and the drugs are triple antituberculous compound drugs including rifampicin, isoniazid and pyrazinamide or moxifloxacin. The three antituberculous drugs are matrix drug solutions, the sodium alginate or chitosan is a carrier solution, the matrix drug solutions and the carrier solutiona are mixed to prepare a solution, the polymer solution containing drugs is dispersed into fogdrops with a certain diameter by adopting a high-voltage electrostatic droplet mode, and the fogdrops are sprayed into a solidifying liquid to prepare antituberculous drug microspheres under the action of calcium ions. The embolization sustained-release preparation can be used for treating tuberculosis, massive hemoptysis of pulmonary tuberculosis, tuberculosis cavity, renal tuberculosis, osteoarticular tuberculosis, genital tuberculosis, tuberculosis of thyroid gland, tuberculosis of cervical lymph nodes, tuberculosis of pericardium, tuberculosis of chest wall, pleural tuberculosis and other kinds of tuberculosis in a body.

The invention provides a method for synthesizing N-benzylhydroxylamine hydrochloride in industrial production. The method comprises the following steps: mixing an oxidant, diphenylamine and an organic solvent under the action of tungstate, so as to obtain C-phenyl-N-benzyl nitrone; mixing the C-phenyl-N-benzyl nitrone, MTBE and hydroxylamine hydrochloride methyl alcohol, so as to obtain a product, namely N-benzylhydroxylamine hydrochloride. The overall synthesis process disclosed by the invention is simple and convenient to operate, and stable in condition, the reaction yield is high and the product purity is high. According to the technique disclosed by the invention, the effectiveness of the method is confirmed by multiple batches of kilo-scale verification; and the large-scale production of N-benzyl hydroxylamine is smoothly achieved.

The invention provides a regeneration method of a cation exchange resin for amino acid analysis. The regeneration method comprises steps of washing the cation exchange resin by ultrapure water, acetone, ultrapure water, waterless ethanol, ultrapure water, a water solution of hydrochloric acid, ultrapure water, a water solution of sodium hydroxide, and ultrapure water in sequence through an ultrasonic mode, and the supernate is discarded in each step of ultrasonic washing. When a cation exchange resin, which is regenerated by the provided method, is applied to amino acid analysis, the analyzing performance of the resin is prominently improved, and thus a good regeneration effect is achieved.

The invention describes a process for calcining a mineral comprising the following steps feeding a mineral into a fluidized bed reactor (i), injecting biogas as fuel into the fluidized bed reactor (ii), burning the biogas for generating heat to calcine the mineral (iii), withdrawing calcined mineral from the fluidized bed in the reactor (iv) and withdrawing a mixture of gas and solid particles from a position above the fluidized bed (v).

The invention relates to a method for detecting the content of catechinic acid in a baked product. The method comprises the following steps of: (1) preparing a sample solution; (2) preparing a reference solution; (3) making a standard curve; (4) measuring the sample solution; and (5) calculating the total content of the catechinic acid in the sample solution according to the standard curve and the peak area of the sample solution.

The invention discloses a disulfiram nano-particle, and a preparation method and application thereof. The nano-particle consists of disulfiram, nanometer metallic oxides and silk fibroins, and belongsto the technical field of nanometer drug carriers. The invention also discloses a preparation method for the nano-particle. The preparation method comprises the following steps of: firstly, slowly dripping disulfiram solutions into a nanometer metallic oxide dispersion liquid; continuously stirring, then, adding a silk fibroin solution to be continuously stirred, and finally, adding three times of acetonitrile for crosslinking solidification; and carrying out rotary evaporation to remove organic solvents, and carrying out freeze-drying to obtain the disulfiram nano-particle. The disulfiram nano-particle prepared by the preparation method is simple in preparation, is high in drug carrying amounts, is high in stability, can effectively inhibit the proliferation of tumor cells under a low dosage, and has a wide clinic application prospect, and the anti-tumor effect of the disulfiram nano-particle is obviously superior to a disulfiram drug.

The invention discloses bilirubin nanoparticles for treating acute pancreatitis and a preparation method thereof. The nanoparticles are mainly composed of silk fibroin, bilirubin, genipin and ceramide. The method comprises the steps that firstly, the bilirubin, the genipin and the ceramide are dissolved in a mixed organic reagent; secondly, the silk fibroin is dissolved in an aqueous solution, then the mixed solution of the bilirubin, the genipin and the ceramide is slowly added into the silk fibroin solution dropwise and continuously stirred, the organic solvent is removed through dialysis, and an obtained nanoparticle suspension is diluted with pure water to obtain the bilirubin nanoparticles. The bilirubin nanoparticles can be used for treating acute pancreatitis and relieving tissue edema caused by pancreatitis, can be applied to preparation of medicines for treating acute pancreatitis, and has wide clinical application prospects.

Belonging to the technical field of solar cells, the invention specifically relates to a D-A-pi-A three-dimensional phenothiazine dye sensitizer, a preparation method and application thereof. The molecular structure of the dye sensitizer is shown as formula A. The dye sensitizer adopts cheap and easily available phenothiazine as the starting material, and is synthesized by substitution, bromination, suzuki coupling, boric acid esterification, Knoevenagel condensation and other simple reactions. The dye sensitizer adopt phenothiazine as the electron donor end, and uses spirobifluorene for three-dimensional modification, is conducive to inhibiting dye aggregation and reducing charge recombination, also introduces benzothiadiazole with electrical absorption as the charge trap, greatly improves the photon capture ability of dyes, shows good photoelectric conversion performance, and shows very good photoelectric performance in solar cells.

The invention provides a method for decomposing ternary alloys to prepare silicon or germanium nanometer materials. The method comprises the steps of solid-phase synthesis of Li-Zn-Si or Li-Zn-Ge ternary alloy compounds and preparation of the silicon or germanium nanometer materials by decomposition of the Li-Zn-Si or Li-Zn-Ge ternary alloy compounds. The used raw materials are low in production cost, free of poison and safe; and the method is mild in reaction condition, stable in process, high in yield, low in cost, free of complex aftertreatment process, suitable for scale production of the nanometer silicon or germanium materials and higher in market competitiveness. The prepared nanometer silicon or germanium materials are of porous structures, small in particle size (10-100 nm), narrow in particle size distribution, uniform in particle size, high in purity, low in oxygen, excellent in dispersibility and high in applicability.

The invention belongs to the technical field of organic functional materials, and relates to a perylene diimide electron transport material, a synthesis method thereof, and application of the perylenediimide electron transport material in a trans-planar perovskite solar cell. According to the invention, a phenothiazine dioxide group is used as a core structure, a perylene diimide group is connected to 3- and 7- substitution sites of a phenothiazine dioxide structure unit, and perylene diimide electron transport materials with different torsion structure configurations are constructed by introducing different peripheral groups and regulating and controlling the spatial stereoconfiguration of molecules. The perylene diimide electron transport material provided by the invention has the advantages of stable conditions, low cost, high electron mobility and the like. Compared with a trans-planar perovskite solar cell based on a fullerene electron transport material, the cell based on the electron transport material has no relaxation phenomenon under a working condition. In addition, the manufacturing cost is lower, the photoelectric conversion efficiency is higher, the stability is better, and large-scale commercial production is promoted.

The invention relates to fluorescent glass ceramics and glasses containing europium containing the following components: and which are particularly suitable for the production of dental prostheses, the fluorescent properties of which are largely comparable to the fluorescent properties of natural teeth.

The invention relates to a preparation method of p-toluene sulfonic acid quaternary amine of carboxymethyl chitosan, which is characterized by comprising the following steps of: under the protection of nitrogen, adding potassium carbonate, acetonitrile and methyl p-toluene sulfonic acid, controlling the temperature of 15 DEG C+3 DEG C, dripping acetonitrile solution of carboxymethyl chitosan, carrying out mechanical stirring for 5 minutes under room temperature, rising temperature to 83 DEG C, and carrying out violently backflow reaction for about 22 hours. The preparation method has the following advantages of having lower price and easy obtaining for reaction materials, mild reaction, simple condition, stability, easy production on scale and novel synthesis method, avoiding the use of highly toxic reagent of methyl iodide and dimethyl sulfate and the like, cleanness, environmental protection and greatly reducing hazard and toxicity; and the products has obvious leap in the properties of absorption and regeneration.

The invention discloses a flowing type high-temperature high-pressure solubility online measuring device and a measuring method thereof. The system comprises a feeding system, a balance kettle, a sampling system and a pressure control system. A Hastelloy C276 material is adopted as the balance kettle body so that the balance kettle body can resist a high temperature of 823K and a high pressure of35MPa, and a stable phase balance state can be obtained in a relatively large temperature and pressure range; the reasonable feeding system ensures that reagents entering the balance kettle are consistent in composition and are uniformly mixed; a precise temperature and pressure control system and a mechanical stirring device ensure that a fluid phase in the balance kettle is fully balanced; the reasonable sampling system ensures that the phase balance of the flow system is not influenced in the sampling process, the high-voltage conductivity detection pool can detect the conductivity of the sample on line, and the solubility data of the fluid is further obtained.