86 results about "Nuclear track" patented technology

The invention discloses a composite nuclear track membrane and a preparation method thereof. The composite nuclear track membrane comprises a polyester nuclear track membrane or a polycarbonate nuclear track membrane, wherein a porous cellulose acetate membrane is composited on one surface of the polyester nuclear track membrane or the polycarbonate nuclear track membrane so as to form the composite nuclear track membrane of which the thickness is 67-160 microns, the aperture of the polyester nuclear track membrane or the polycarbonate nuclear track membrane is 1-10 microns, the pore density of the polyester nuclear track membrane or the polycarbonate nuclear track membrane is 2*10<5>/cm<2>-2*10<7>/cm<2>, and the thickness of the polyester nuclear track membrane or the polycarbonate nuclear track membrane is 7-25 microns. The composite nuclear track membrane has the advantage that the surface hydrophilicity is good, the mechanical strength is high, the membrane thickness is moderate, the automatic operation can be realized easily, the flux of the filtering liquid is high, and the assimilative capacity is strong; the composite membrane is an integer, is not layered and is suitable for fabricating roll type filter cores; the porous cellulose acetate membrane composited on the nuclear track membrane is taken as a pre-filtering layer or a support layer of the nuclear track membrane, so that the problems about mechanical strength and thickness of the membrane are solved, and meanwhile, the a pre-filtering problem of the membrane is solved.

The invention relates to a novel nuclear pore membrane (or nuclear track membrane), generally the nuclear track always has conicity after etching, the millipore of the nuclear pore membrane is single-cone or double-cone, the center aperture of the millipore of the double cone is less than the aperture on both surfaces of the membrane. Particles are blocked in the millipore easily when filtering, and the membrane is blocked easily. Meanwhile, the ions with lower mass number are utilized for irradiating the electrolyte membranes, for the nuclear track etching sensitivity is lower, conicity is larger, the nuclear pore membrane with small aperture is made hard. The center aperture of the millipore of the nuclear pore membrane made by the invention is larger than the diameters of both surfaces of the membrane or is of column form capillary tube shape. The shape of the millipore causes the particles larger than the membrane surface aperture to be trapped on the membrane surface, and the nuclear pore membrane is not blocked easily. Meanwhile, a new method is provided for making nuclear pore membranes by utilizing the ions with lower mass number.

The invention relates to the medical clinic transfusion field, more particularly, relating to the nuclear track microporous membrane used on a precision medical solution filter and the preparation method. The substrate membrane of the nuclear track microporous membrane used on the precision medical solution filter selects the polycarbonate as the material, and the nuclear track microporous membrane is obtained by high energy charged particle radiation and then sensitized and etching treatment to the substrate membrane, the apertures of the nuclear track microporous membrane are between zero point two micron and ten microns, the density of the nucleopores is that the membrane has five multiply one hundred and five to seven multiply one hundred and five pores per square centimeter. The preparation method of the nuclear track microporous membrane of the invention includes steps of radiation, sensitized treatment, etching and rinsing. The arrangement and application of the precision filter made by the nuclear track microporous membrane of the invention on the terminal of the infusion set of the disposable precision filtering infusion set can effectively filter the insoluble particles in the medical solution, and the filtration rate is more than or equal to ninety five percent, and hold the last pass of the medical solution form entering the human body, thus truly blocking the invasion of the insoluble particles to patients.

The invention relates to a cola stable paster which can treat hyperkinetic symptom of children, which comprises back liner, drug layer, release-control layer, paste layer, and anti-paste layer. The invention is characterized in that the back liner is aluminized film; the drug layer is cola stable drug and polyacrylacid ester pressure-sensitive gel; the release-control layer is modified EVA film or nuclear track porous film; the paste layer is cola stable drug and polyacrylacid ester pressure-sensitive gel; the cola stable drug content of drug layer is higher than the cola stable drug content of paste layer. The invention can avoid oral taking, with high biological utilization, stable effect, continuous release, and high safety. The invention also provides relative production.

A method comprising the following steps: (a) adjusting a radiation dose measurement for a fluorescent nuclear track detector based on a plurality of fluorescence contrast images for the fluorescent nuclear track detector to thereby produce a calibrated radiation dose measurement, and (b) displaying the calibrated radiation dose measurement to a user and/or saving the calibrated radiation dose measurement to a storage medium, wherein the fluorescent nuclear track detector comprises a luminescent material, wherein the radiation dose measurement is based on one or more fluorescent light measurements produced by fluorescent imaging of the fluorescent nuclear track detector using excitation light from a laser having a first wavelength, and wherein the plurality of fluorescence contrast images are produced by illuminating the fluorescent nuclear track detector with excitation light having a second wavelength.

The invention discloses a device and a method for measuring the concentration of <222>Rn and <220>Rn synchronously by adopting electrostatic collection and solid nuclear track. The measurement device consists of a box body, a third filter, a first aluminum diaphragm, a first solid nuclear track detector, a first filter, a second solid nuclear track detector, a second aluminum diaphragm, a second filter, a high-voltage module, a battery, a base plate and a frame-shaped seal ring. In measurement, the high-voltage module in the measurement device is started up, so that high-voltage electrostatic fields are formed between the inner surface of a first measurement cavity of the measurement device and the surface of the first solid nuclear track detector as well as between the inner surface of a second measurement cavity and the surface of the second solid nuclear track detector respectively, and then the measurement device is placed in a measurement environment to measure the concentration of <222>Rn and <220>Rn in air, and the measurement time is T. After the measurement process, the first solid nuclear track detector and the second solid nuclear track detector are taken off, and are subjected to chemical etching, and the concentration of <222>Rn and <220>Rn in the environment is obtained by calculation.

The invention discloses a method for measuring a geologic age on the basis of a thermoanalysis. The method comprises the following steps: selecting a reference sample, measuring the average values of <238>U, <232>Th and <147>Sm isotopic contents of the reference sample, calculating the values of N238, N235, N232 and N147<S>, calculating the standard N4<He> of the reference sample, making the isothermal DSC curve of the reference sample by a differential scanning calorimeter, measuring the annealing quality in a unit mass, calculating the annealing heat released by an average of alpha-ion nuclear tracks of the reference sample, then measuring the contents of uranium, thorium and samarium in a sample to be measured, calculating N235, N232 and N147<S>, making the isothermal DSC curve of the sample to be measured by using the differential scanning calorimeter, measuring the annealing heat, calculating the number of the nuclear tracks of the sample to be measured in the unit mass, and finally calculating the geologic age t of the sample to be measured, wherein the geologic environments experienced by the sample to be measured and the reference sample are similar. According to the method disclosed by the invention, a helium measurement is replaced by a heat measurement, and the method is simple and practical.