62results about How to "Avoid radioactive contamination" patented technology

The invention belongs to the technical field of preparation of radioactive sources, and discloses an electric deposition device for preparing a high-resolution alpha source. The electric deposition device comprises a power supply, an electric plating tank, a bottom weigher, a magnet and a platinum electrode; the electric plating tank is of a two-layer structure with an inner layer and an outer layer; openings are formed in the upper end and the bottom of the inner layer; the inner layer of the electric plating tank is used for accommodating electric deposition plating liquid; a cooling circulating water inlet and a cooling circulating water outlet are formed in opposite angles of the outer layer; an upper sealing ring and an upper sealing cover on the upper side are arranged in the opening in the upper end of the inner layer; a lower sealing ring and a lower sealing cover on the lower side are arranged in the opening in the bottom of the inner layer; the bottom weigher serves as a cathode, and is tightly attached to the lower portion of a hole way in middle of the lower sealing ring; and the platinum electrode extends from the radial center position of the upper end of the inner layer of the electric plating tank to a position 0.5-1 cm away from the bottom of the electric plating tank. The alpha source prepared by the device has the beneficial effects of high electric deposition efficiency, a compact plating layer, good uniformity and low deposition thickness.

The invention provides a stoneware sheet and a preparation method thereof. The stoneware sheet comprises the following chemical components in percentage by weight: 55-68% of SiO2, 14-28% of Al2O3, 0.5-1.8% of Fe2O3, 0.2-1.5% of TiO2, 1-12% of CaO, 0.3-1% of MgO, 2-5% of K2O and Na2O and 5-30% of fiber reinforcer. The preparation method comprises the following steps: independently ball-milling and pulping the fiber reinforcer, mixing with other pulping raw materials, carrying out spray granulation, and dry-pressing to obtain the green body. The stoneware sheet has the advantages of favorable adhesiveness, high strength, favorable flatness, high resilience and flexibility, high abrasive resistance, favorable anti-fouling performance, fire resistance, high temperature resistance, long service life, no radioactive contamination, light weight and the like.

The invention utilizes the mud to calcine the bone ash case, relating to the funeral appliance technique field of bone ash case. The steps comprises that using the clear mud of Yellow River as raw material; selecting the mud material whose sand percent is 3-8 %; adding water to be dipped; continuous mixing straight forward; filtering four times at sequence; depositing and pumping water; airing and draining; kneading; removing gas holes; loading mould; unloading mould; dry in shade; finishing blank; carving the patterns of twelve Chinese zodiac; cleaning the opposite opens; sanding; burnishing in water; calcining in furnace for five days in the temperature that progressively increased from 800-1000 Deg. C; closing the furnace; opening the furnace and cooling; getting out from the furnace to be wax finished for the finished product of bone ash case made from mud. The invention can apply storage of bone ash, and has the advantages that utilizing the waste of mud of Yellow River, saving the natural resource of wood, fire prevention, and insect prevention.

The invention relates to a method for detecting 3'-5' exo-activity of DNA polymerase or mismatching and a kit thereof. The method comprises the following steps: providing a nucleic acid of a known sequence, detecting a primer which is complementary to a nucleic acid with the known sequence, wherein the last deoxynucleotide at the 3' hydroxyl end and the first two deoxynucleotides to-be-polymerizedare different from each other; hybridizing the nucleic acid with the known sequence and a detection primer, and adding the DNA polymerase to be tested and the fluorescently labeled deoxynucleotide different from the deoxynucleotide to-be-polymerized for the first signal collection; adding exo-free Taq DNA polymerase and adding the first fluorescently labeled deoxynucleotide to-be-polymerized andthe second fluorescently labeled deoxynucleotide to-be-polymerized, and performing secondary signal collection; comprehensively analyzing a first signal and a second signal to determine whether the DNA polymerase to-be-tested is circumscribed or mismatched. The method can detect DNA polymerase 3'-5' exo-activity or mismatching when four nucleotides are present alone in a reaction system.

A nuclear reactor is positioned on a barge which floats on the water of a water tank. The water tank includes a bottom wall, first and second end walls and first and second side walls. The bottom wall includes a lower layer of concrete, an intermediate layer of water impervious material positioned on the lower layer of concrete, and an upper layer of concrete positioned on the intermediate layer of water impervious material. Each of the first and second end walls and the first and second side walls includes an outer layer of concrete, an intermediate layer of water impervious material positioned at the inner side of the outer layer of concrete, and an inner layer of concrete material positioned at the inner side of the intermediate layer of water impervious material.

The invention discloses a kit for measuring an rT3 content by a magnetism particulate chemiluminescence method and a detection method of the kit. The kit provides a preparation method of an rT3 antigenic derivative, the rT3 antigenic derivative and an enzyme-labeled rT3 antigenic derivative are prepared, and a biotinylated rT3 antigenic derivative, anti-body enzyme-labeled reagent and calibrationproduct detection system and an enzyme-labeled rT3 antigenic derivative, biotinylated rT3 rabbit polyclonal and calibration product detection system can be built. As an enzymatic luminescence system possibly needs to perform coupling under different conditions such as biotin, enzyme labels and even protein on rT3 antigens under different conditions, the rT3 antigenic derivative serving as an intermediate is prepared, and the problem can be solved. Detection value and given value correlations of different systems are 0.9 or more, good correlations are shown, the correlations of two measuring systems are 0.9540, good correlations of two testing methods are shown, and testing results are consistent, a whole reaction system is short in reaction time, radioactive pollution is avoided, a validity period of a reagent is prolonged, the kit is high in sensitivity and accurate in testing result, and test operation processes are simplified.

The invention discloses a method for detecting 3'-5' exo-activity of a specific base by nuclease and a kit thereof. The method firstly detects the exo-activity of the specific base by enzyme; the method can detect any base, including dATP, dCTP, dGTP, dTTP, dUTP and degenerate base, and the like, and the application range is wide; the method can detect the 3'-5' exo-activity of most nucleases; theuse of fluorescence as a detection signal avoids radioactive contamination and has high sensitivity; nucleotide chains modified by fluorophores cannot be required, and the cost is low; the method canbe used to rapidly and extensively screen nucleases, and the application is flexible and the flux is high.

The invention discloses a radioisotope logging tracer underground screening method. The method comprises the following steps that a mixed tracer is added into an isotope bin of a screening device; the valve is opened, and the isotope tracer agent is soaked in the injected water; the valve is closed, and the injected water in the isotope bin is in a static state; in the static state, the tracers in the isotope bin are layered, the tracers with the same specific gravity as the injected water are suspended, and the isotope logging tracers with the specific gravity closest to the specific gravity of the injected water of the to-be-logged section can be screened out; the tracer most matched with the specific gravity of the injected water can be screened out, the problem that isotope logging data are unqualified due to the fact that the specific gravity of the tracer is not matched is solved, and the method is particularly significant to water injection and fine logging of different logging blocks and different mineralization degrees of an oil field. The breakage rate and the isotope desorption rate of the tracer agent are detected by replacing an expensive and huge ultrahigh pressure generating device during ground detection with the high pressure and the real temperature environment of underground injected water, and the problems of radioactive contamination and data distortion are solved.

The invention relates to an applicator for applying a radioactive substance to a biological tissue, wherein the applicator comprises a container for receiving the radioactive substance, an application device with which the substance compound can be applied to the tissue and which can be connected to the container, and at least a part of a delivery device, by means of which the radioactive substance can be fed from the container into the application device when the application device is connected to the container.

In a method and apparatus to regulate a vessel intervention conducted with a vessel intervention unit, wherein an intervention region of the vessel intervention is at least partially imaged by means of an imaging monitoring unit, and a monitoring region to monitor the vessel intervention is selected, and the vessel intervention is at least partially automatically regulated in the intervention region dependent on at least one characteristic variable identified in the monitoring region.

A device for purification of water sink is provided to remove radioactive substances in a water sink of nuclear facilities. The device for purification of water sink of the present invention relates to a detachable structure for repeating process, changing the height of the device according to the water level, and moving the device. The device is filled with filter agent or adsorbent in each basket assemblies and put into a water sink for purification process. After purification process of water sink, the highly contaminated waste filter agent or waste adsorbent within the basket assemblies is easy to be removed from the device for drying. The number of basket assemblies is able to be reduced in accordance with the water level drop for draining fluid from the water sink at lower level water.

The invention provides a sealed carrier vehicle. The sealed carrier vehicle comprises a vehicle body, a roller device, a partition plate and two vehicle doors arranged left and right, the vehicle body of which the front is open is a cube, the edge of an opening of the vehicle body is fixedly provided with a sealing strip, the right vehicle door is pressed on the left vehicle door, and the sealing strip is fixedly arranged on the contact part of the right vehicle door and the left vehicle door; a rotating rod is arranged on the right vehicle door in a hinged mode, a handle is fixedly connected to the rotating rod, and the upper side and the lower side of the vehicle body are fixedly provided with locking devices, and the two ends of the rotating rod are fixedly provided with supporting devices matched with the locking devices; the vehicle body and the vehicle doors are all manufactured with an anti-radiation material; circular holes are formed in the vehicle doors, and the circular holes are fixedly connected with anti-radiation gloves; square holes are formed in the back side wall of the vehicle body, an anti-radiation sealing baffle is arranged in the square holes, the partition plate is an operation platform connected inside the vehicle body in a sliding mode, through holes are formed in the operation platform, and an anti-radiation baffle is arranged in the through holes; the lower portion of the operation platform is provided with an anti-radiation recycle frame, through holes are formed in the position of the top of a frame body, corresponding to the through holes, and a closing plate is arranged at the position of the through holes.