117 results about "Cobalt-60" patented technology

The invention relates to a dry powder type shell powder interior wall coating material which has the functions of adsorbing and decomposing harmful gas and peculiar smell, restraining bacteria, sterilizing and resisting static electricity and using shell powder, nanometer inorganic filler and high molecular powder materials as main components. The invention solves the defects of high cost, high energy consumption, pollution and incapability of purifying indoor harmful gas in the existing interior wall coating materials. The coating material uses natural or manually cultivated shell powder as basic materials; meanwhile, a certain quantity of nanometer titanium dioxide and nanometer electric stone powder radiated by cobalt-60 gamma ray and the high molecular powder materials are added; the weight percentages of all components are as follows: 30-60% of shell powder, 10-20% of calcined kaolin, 10-20% of heavy calcium, 10-20% of talcum powder, 1-5% of nanometer titanium dioxide, 1-5% of nanometer electric stone powder, and 5-20% of high molecular powder materials; the particle size of the shell powder is 200-1250 meshes.

A container inspection equipment with cobalt-60 gamma-ray source and cesium iodide or cadmium tungstate detector includes a cobalt-60 gamma-ray source, a cask, a front collimator, a rear collimator, a cesium iodide or cadmium tungstate detector, signal and image processing systems, container trailer system, and automatic control system. The cask of the cobalt-60 gamma-ray source, the beam shutter, and the front collimator are fixed on the same chassis to form an integration and placed in the source room. The rear collimator, cesium iodide or cadmium tungstate array detector and the radiation catcher are fixed on the same chassis to form an integration and placed in the detector room. A container inspection tunnel is formed between the source room and the detector room. The equipment is mainly used for inspecting smuggling goods and contrabands etc., in large containers, container trucks, train carriage and air containers. The equipment either can be installed in the sea port and land frontier customs or installed at the air port, vital communication line, and railway station.

The object of this invention is to provide a method for mitigating a stress corrosion cracking of reactor structural material which makes it possible to suppress the rise in the main steam line dose rate without secondary effects such as a rise in the concentration of radioactive cobalt-60, etc. in the reactor water. Hydrogen and a reductive nitrogen compound containing nitrogen having a negative oxidation number (for example, hydrazine) are injected into the core water of boiling water nuclear power plant. By injecting the reductive nitrogen compound containing nitrogen having a negative oxidation number into the core water, the stress corrosion cracking of structural material of reactor can be mitigated without side reactions such as a rise in the concentration of cobalt-60, etc.

The invention relates to a device and a method for measuring strong gamma ray energy spectrum using a scattering method. The device for measuring strong gamma ray energy spectrum using the scattering method comprises an illuminator with a shield function, a high specific activity isotope radioactive source arranged in the illuminator, a front collimator used for constraining a gamma ray emerged through a collimating aperture of the illuminator, a scattering target used for receiving a quasi-parallel gamma ray beam formed by the collimation of the front collimator and a detector used for measuring a scattering ray with 662 kilo electron volt ( keV ) average energy obtained by scattering in a 50 degrees angle, wherein the detector is arranged in an inner cavity of a shield body with the collimating aperture. The device and the method for measuring strong gamma ray energy spectrum using the scattering method resolve the difficult problem of measurement of a strong gamma ray generated by a cobalt-60-source in a calibration laboratory.

The invention relates to a method for preserving white fish by removing the scales and the internal organs of the white fish, cleaning the whiter fish, cutting into sections, pretreating, preserving and storing at low temperature. The method comprises the following steps: (1) pickling the pretreated white fish with salt and garlic powder for 5-15min, cleaning the white fish, and soaking into a preservative for 20-40min; (2) subjecting the white fished treated in the step (1) to modified atmosphere packaging by using a modified atmosphere packaging machine; and (3) subjecting the packaged white fish to direct gamma irradiation by using a cobalt 60 irradiation source. The method is easy to operate and practical. Due to the adoption of the method, the freshness and the color of the meat of the white fish can be better kept, and the shelf life of the meat of the white fish can be prolonged. The preservative is convenient to use and is safe and environmentally-friendly.

A highly compact, high-performance volumetric imaging system is proposed, that is integrated with a multi-source Cobalt-60 gamma irradiator for high throughput, high accuracy and minimally invasive fractioned treatments of intracranial, orbital and head-and-neck targets.

The invention provides a method for preparing a bovine cornea stroma from a fresh bovine cornea. The method comprises the steps that a cornea piece is cut from a fresh bovine eyeball and then steeped in a hypotonic solution; the bovine cornea stroma containing a lamina elastica anterior and part of a stroma layer is obtained from the cornea piece, and is frozen and thawed repeatedly to break cells; the bovine cornea stroma is bleached with a buffer solution, steeped in a cell removing reagent and then washed with ultrapure water in sequence; the bovine cornea stroma is put into another cell removing reagent for steeping, and then washed with ultrapure water again; the bovine cornea stroma is put into a dehydrating agent to be steeped and then irradiated with cobalt-60, and then the prepared bovine cornea stroma is dried and stored. The physical method and low-toxicity regents are adopted in the method, and time is very short, so that the obtained bovine cornea stroma is completely preserved, has the advantages of being good in transparence and compact in structure, and is close to the natural feature of the human cornea.

The invention provides a preparation method of a separator for a fuel cell. The preparation method comprises the following steps of firstly, preparing a polymerized ion liquid and double-bond modified nanometer titanium dioxide, mixing and dropping the polymerized ion liquid, the double-bond modified nanometer titanium dioxide, a monomer containing a polymerizable group and an emulsifier onto a surface plate, placing the mixture in a radiation field with an inert gas atmosphere, radiating the mixture for 35-45 minutes by a cobalt 60-Gamma radiation method, immersing the product in a 0.5-1.0mol/L alkali liquid with a temperature of 50-60 DEG C for 54-72 hours, washing the product with water to be neutral, and carrying out vacuum drying to prepare a separator finished product. According to the method, adamantine is used as an electron supply group, and the alkali resistance and the chemical stability of the triazine ion liquid are promoted; and the double-bond modified titanium dioxide is taken as a cross-linking agent, and thus, the alkali resistance, the mechanical property, the water absorption performance, the methanol-preventing permeability and the chemical stability of the separator are improved on the premise of ensuring relatively high ionic conductivity.

The invention discloses an external dressing rich in collagen and hyaluronic acid, which comprises a non-woven fabric layer 5, a collagen composite solution 4 and an independent packaging container 3. The nonwoven fabric layer 5 is soaked in the collagen complex solution 4 . Collagen compound solution 4 includes the following components, human-like collagen 1-2%; hyaluronic acid 0.3-0.8%; allantoin 0.05%-0.25%; the balance of water. Hyaluronic acid is hyaluronic acid produced by genetic engineering and microbial fermentation; allantoin is allantoin extracted and synthesized by chemical synthesis; water is ultrapure water with a resistivity of 18.2MΩ*cm or greater at 25°C . The products are produced, internally and externally packaged in a class 100 clean workshop, and the finished product is sterilized by cobalt-60 irradiation. By adding appropriate concentrations of human-like collagen, hyaluronic acid and allantoin, it achieves the effect of moisturizing and promoting skin wound healing. At the same time, the present invention greatly reduces the irritation and allergy rate of the dressing by means of irradiation sterilization without adding antiseptic system.

The invention provides a medical disinfection coupling agent with disinfection and sterilization functions, which comprises the following components in percentage by weight: 0.3 percent of Carbomer 980 raw material powder, 0.12 percent of sodium hydroxide, 3 percent of glycerol, 1 percent of cetylpyridinium chloride, and the balance of purified water. The preparation method comprises the following steps: respectively dissolving Carbomer 980 and sodium hydroxide into purified water; stirring and mixing by virtue of a high-speed stirrer; adding glycerol, the disinfectant, the lubricant and the emollient; and stirring, defoaming and filling, and performing radiation disinfection through cobalt 60. The medical disinfection coupling agent has the characteristics of quick sterilization, broad spectrum of anti-bacterium, long bacteria inhibition time, no antibiotics, drug resistance prevention and the like, and is used for ultrasonic diagnosis, wherein a probe is contacted with mucosa; and the medical disinfection coupling agent has the advantages of wide raw material sources, simple preparation method and cost reduction.

The invention relates to a processing method for preserved fish. According to the processing method, a chub processing byproduct, namely fish bones, is processed into paste which is added into raw materials. The process comprises the following steps: pre-treating raw materials, deodorizing, preparing materials, rolling, paving slices, drying, baking, packaging and sterilizing. According to the processing method for the preserved fish, the used raw materials and ingredients are food-grade and are healthy and safe; any antioxidant including a flavor enhancer, a preservative and the like is not added. Compared with a conventional preserved fish processing method, the processing method is used for crushing and wetly grinding fish leftovers, such as fish heads, fish tails and the fish bones into paste and the paste is added into fish according to a certain ratio; the investment of a crusher and bone paste grinding equipment for processing the fish bones is less, the operation is simple and the continuous production is realized. Furthermore, the processing method for the preserved fish carries out cold sterilization by adopting cobalt-60 gamma-ray radiation so that the preservative can be replaced for prolonging the shelf life of preserved fish products.

The invention discloses a preparation method of high-substitution-degree acetylated sodium hyaluronate. The preparation method is characterized by being prepared from hyaluronic acid through I activation separation, II dehydration reaction and III acylation reaction, wherein the I activation separation is carried out by virtue of an acetone solution of triethylamine; the II dehydration reaction iscarried out through cobalt-60 radiation auxiliary dehydration of acetic anhydride at a low-temperature condition; and the III acylation reaction is carried by virtue of a catalyst and an acylation enhancer. The preparation method has the beneficial effects that by utilizing the I activation separation operation, the acylation degree is increased, and the introduced impurities are reduced during the activation; by utilizing low-temperature cobalt-60 radiation auxiliary dehydration, the temperature of the dehydration reaction is reduced, acetic anhydride is taken as a dehydration agent, and substances generated through the water absorption of acetic anhydride can take part in the III acylation reaction in the later procedure, so that the introduced impurities are reduced, and the environmental pollution caused by acid gas when materials are added in the subsequent process is avoided by virtue of acetic anhydride; and by adding a catalyst and an enhancer into the III acylation reaction,the acylation degree is substantially increased.

The invention discloses an aseptic production method of hyaluronic acid products, characterized in that 0.01-0.5% by weight of a preservative is added to a hyaluronic acid product before irradiating under irradiation dosage of 6-10 kGy. By controlling production raw and auxiliary materials, water, environment and packaging materials, adding suitable preservative to the product and performing irradiating with low dosage of cobalt 60, the asepsis standard is met; degradation of high-molecular-weight hyaluronic acid can be prevented, the molecular weight of the hyaluronic can be maintained in a reasonable ratio range, and product quality level is increased.

The invention relates to an irradiation device and a synthesis method for preparing a hydrogel sheet through a cobalt-60 radioactive source. The irradiation device comprises a container and a hydrogel molding bracket, wherein the hydrogel molding bracket consists of more than two separation plates and a gasket which is used for regulating the distance between the separation plates, is fixed through an elastic fixing band, and is detachably arranged in the container; each gasket is fixed to one of four corners on one side of the corresponding separation plate; the shape of the hydrogel molding bracket is matched with that of an inner cavity of the container. The hydrogel molding bracket which is fixed through the fixing band is arranged in the inner cavity of the container, the shape of the hydrogel molding bracket is matched with that of the inner cavity of the container, the container is filled with material liquid and is sealed, the cobalt-60 radioactive source radiates, and the bracket is disassembled, so that the hydrogel sheet can be obtained. The irradiation device which is used for producing the hydrogel sheet is low in production condition requirement, simple in operation step, low in operation difficulty and high in production efficiency; the hydrogel sheets are uniform in thickness and high in qualified rate.

The invention relates to preparation and application of auto-platelet-rich plasma thixotropic separating gel, belonging to the fields of high polymer chemistry and biomedicine. The preparation method comprises the following steps: by using acrylate monomer, nano silicon dioxide and silanization activator as raw materials, stirring and heating to react at 60-140 DEG C for 1-4 hours in a nitrogen protective atmosphere; and adding a photoinitiator, irradiating with ultraviolet light to obtain a thixotropic composite high-polymer-base adhesive, blending the thixotropic composite high-polymer-base adhesive with dioctyl phthalate and Span 80, carrying out vacuum degassing and irradiating with cobalt-60 gamma rays. The thixotropic separating gel has excellent thixotropy, biocompatibility and stability, and is suitable for safely, simply and completely extracting auto-platelet-rich plasma and other bioactive substances in biomedicine.

The present invention discloses an X-ray conversion target comprising a panel and a base. The middle parts of the panel and the base are provided with openings along the length directions. The openings between the panel and the base are fixedly provided with a bombardment plate. Through installing the X-ray conversion target under an accelerator scanning window, the X-ray conversion target is bombarded by electron beams, and thus an X ray is obtained. Since the X ray has high penetrability, when a penetration requirement can not be satisfied by electron accelerator electronic irradiation, an X-ray irradiation product is obtained through bombarding the X-ray conversion target by the electron beams, and existing cobalt-60 radioactive source irradiation can be replaced.

The invention discloses a pleurotus geesteranus strain production method for increasing fruit body yield and total amino acid content with cobalt 60 radiation treatment. The method comprises the following process steps of: producing a stock spawn; producing a stock seed; and producing a cultivar by using the stock seed, and is characterized in that: the stock spawn is produced by the following steps of: preparing a material: preparing a stock spawn culture medium and putting the stock spawn culture medium into a test tube; purifying and rejuvenating from a pleurotus geesteranus fruit body to obtain a stock spawn, and inoculating stock spawn mycelia onto the stock spawn culture medium; and after a mycelia tube is full, and performing cobalt 60 radiation-induced breeding treatment for 30-60 minutes at the radiation dose of 0.4-0.6 KGY. Compared with the prior art, the method has the advantage that: the pleurotus geesteranus fruit body yield and the total content of various amino acids including total sulfur amino acid content, total branched-chain amino acid content, total child amino acid content, total necessary amino acid content, total flavor amino acid content, total sweet amino acid content and total amino acid content can be increased remarkably.

The invention relates to a sterilization method of gelatin, in particular to an anaerobic packing low-temperature and high-dosage-rate irradiation sterilization method of the gelatin. The method is characterized by comprising the following steps: (1) drying the gelatin at low temperature; (2) vacuumizing or carrying out anaerobic packing on the dried gelatin, wherein in the anaerobic packing process, N2 gas with volume of more than or equal to 75% or CO2 gas with volume of more than or equal to 75% is filled; (3) precooling the gelatin packaged in the step (2) for 6-12 hours at the temperature of 0-10 DEG C, wherein a heat preservation box is taken as external packing; (4) irradiating by one of the two methods, wherein one method comprises the steps of irradiating the gelatin which is precooled and packaged in the step (3) by a cobalt-60 source ray with the dosage rate of more than 200Gy/ min to obtain the irradiated and sterilized gelatin, wherein the adsorbed dose range is 4-8kGy; the other method comprises the steps of irradiating the gelatin which is precooled and packaged in the step (3) by an electron beam with the dosage rate of more than 10000Gy/ min to obtain the irradiated and sterilized gelatin, wherein the adsorbed dose range is 4-8kGy. The method solves the problem that the gel strength and the viscosity of the gelatin are greatly reduced after the gelatin is irradiated, so that the application value of the gelatin is reduced or lost.

The invention discloses a protective door of a Cobalt-60 accelerator. The protective door comprises a front plate (1), protective lead plates (2), a channel steel frame (3) and a fixed bolt (4) and is characterized in that the protective lead plates (2) is arranged at the inner side of the front plate (1); two layers of the protective lead plates (2) are supported by the channel steel frame (3) to form a cavity (5); and the fixing bolt (4) is fixedly connected with the channel steel frame (3) after sequentially passing through the front plate (1) and the protective lead plates (2). The protective door of the Cobalt-60 accelerator, disclosed by the invention, is formed by assembling the steel plate and the lead plates in a manner of forming the cavity between the lead plates; a radiation-proof filler is arranged inside the cavity as required, and protective lead blocks are arranged at the fixing bolt holes, so that the electromagnetic radiation, and X rays, Y rays and the like can be effectively prevented and the radiation-proof area can be increased to a maximum extent without dead corners left; and the protective door of the Cobalt-60 accelerator has the features of simple structure and low cost and is suitable for popularization and use.

The invention discloses a method for preparing textile coating ink based on a cobalt 60 gamma ray irradiation technology. The method comprises the following steps: textile coating ink comprises the following components in percentage by weight: 10-30% of polymer coated pigment nano composite particles, 15-40% of a water-soluble cosolvent, 1-3% of a cross-linking agent, 1-3% of a surfactant, 0.1-2%of a PH controlling agent, 0.1-0.5% of a disinfectant and 11.5-72.8% of deionized water; 0.5-1.5% of a polymerizable dispersant is dissolved in 40-70% of deionized water; the pH is regulated to be more than or equal to 7 and less than or equal to 10; 15-40% of pigment is added at a rotating speed of 800-1500r/min; uniform stirring is carried out; sand grinding is carried out in a sand grinder of 500-3000 r/min for 3-7 hours; 1.5-2.5% of an emulsifier and 5-20% of a polymer monomer are added, and sand grinding is carried out for 0.5-1 hour. The stability of the ink and the ink-jet smoothness are improved, and the hand feeling of a fabric is improved.

The invention provides a preparation method for MnO2@SiO2 nano composite particles with core-shell structures. The method comprises the steps of A) mixing potassium permanganate and a silica precursorto obtain a mixed solution; B) irradiating the mixed solution with a cobalt 60 source under a stirring condition to initiate reactions to obtain a mixed solution after irradiation; C) centrifuging the irradiated mixed solution, and separating to obtain the MnO2@SiO2 nano composite particles with the core-shell structures. The method directly irradiates the potassium permanganate solution containing the silica precursor by 60Co gamma-ray, and obtains the MnO2@SiO2 composite nano particles with particle diameters of 100 nanometre or less which take MnO2 as cores and SiO2 as shells by a one-stepmethod. The method has the advantages of simple formula, convenient operation, economic performance, energy saving, green and environmental protection.

The invention provides a method for preparing medical disinfection couplant. The medical disinfection couplant comprises 0.3% of raw material powder of carbomer 980, 0.12% of sodium hydroxide, 3% of glycerol, 1% of cetyl pyridinium chloride and the balance of purified water; the method is that: the carbomer 980 and the sodium hydroxide are respectively dissolved in the purified water, are stirred and mixed by a high-speed mixer, and the glycerol and the cetyl pyridinium chloride are added into the mixed liquor, mixed, then defoamed, filled and disinfected by cobalt 60. The raw materials which are adopted by the medical disinfection couplant are conventional raw materials, can be obtained from a variety of resources, are stable and low in price; and meanwhile, the method is simple, so scale production can be realized, the cost is lowered, and the medical expenses and load of ultrasonic diagnosis and treat are relieved.