695 results about "Ionized radiation" patented technology

The invention provides anti-ionizing radiation powder with a core-shell heterogeneous gradient structure and a preparation method and application of the anti-ionizing radiation powder, and belongs to the field of radiation protection.The preparation method of the anti-ionizing radiation powder with the core-shell heterogeneous gradient structure comprises the following steps that high-atomic-number metal salt is added into deionized water, aging, washing, drying and primary calcination are conducted in sequence, and the anti-ionizing radiation powder with the core-shell heterogeneous gradient structure is obtained; a core layer is obtained; the core layer and low-atomic-number metal salt are added into deionized water, aging, washing, drying and primary calcination are sequentially conducted, and preliminary wrapping powder with the high-atomic-number metal core layer wrapped by low-atomic-number metal is obtained; and adding the preliminarily wrapped powder and rare earth salt into deionized water, and sequentially performing aging, washing, drying, primary calcining, secondary calcining, airflow crushing and air rotation purging to obtain the anti-ionizing radiation powder with the core-shell heterogeneous gradient structure. Through cooperation of the core-shell heterostructure, the high-atomic-number oxide, the low-atomic-number oxide and the multi-element rare earth element, the shielding performance of the material is remarkably improved.

The invention relates to the field of shielding materials, and provides lead-free rubber with ionizing radiation shielding performance and a preparation method thereof, and the lead-free rubber is mainly prepared from barium titanate / boron nitride composite filler, barium tungstate / boron carbide composite filler, tungsten powder, bismuth powder, a rubber matrix and an auxiliary agent according to a proportion. The barium titanate particles are uniformly loaded on the surface of the flaky boron nitride, so that the gamma ray and X ray shielding performance is improved, and meanwhile, the boron nitride provides excellent neutron shielding capability; barium tungstate particles are loaded on the surfaces of the boron carbide nanowires to form a multi-scale shielding network, and the shielding effect of neutrons and ionizing radiation is remarkably enhanced. The rubber matrix endows the material with excellent flexibility and mechanical properties. By scientifically optimizing the component proportion and the preparation process, the problems that a traditional high-density shielding material is prone to agglomeration, poor in flexibility and the like are solved, and the material shows excellent performance in the fields of gamma ray, X ray and neutron shielding and is suitable for the fields of nuclear energy, medical protection, industrial radiation protection and the like.

In the case of forming a fine resist pattern, it is desired to further reduce the roughness of the resist pattern.SOLUTION: A substrate processing apparatus comprising: a heat treatment unit configured to bake a resist film; an exposure unit configured to irradiate the resist film having a portion irradiated with a first radioactive ray with a second radioactive ray; a development unit configured to form a resist pattern by development for removing a part of the resist film; and a control unit configured to control the exposure unit such that the second radioactive ray is collectively irradiated to an entire region of the resist film including the portion irradiated with the first radioactive ray and a portion other than the portion irradiated with the first radioactive ray. The first radiation is ionizing radiation or non-ionizing radiation, and the second radiation is non-ionizing radiation. When the first radiation is non-ionizing radiation, the second radiation is non-ionizing radiation having a wavelength longer than the wavelength of the first radiation. The resist film includes a metal oxide photoresist material.SELECTED DRAWING: Figure 1

Compositions, devices and processes related to etching of a very thin layer or fine particles of a metal are disclosed for monitoring a variety of parameters, such as time, temperature, time-temperature, thawing, freezing, microwave, humidity, ionizing radiation, sterilization and chemicals. These devices have capabilities of producing a long and sharp induction period of an irreversible visual change. The devices are composed of an indicator comprising a very thin layer of a metal (e.g., polyester film having an extremely thin, e.g., about one hundred Angstroms layer of aluminum) and an activator, e.g., a reactant, such as water, water vapor, an acid, a base, oxidizing agent or their precursors, which is capable of reacting with the said indicator. The indicator retains its opacity and metallic luster, e.g., silvery white, mirror like finish of aluminum layer for a long time. The activator destroys the indicator layer including the naturally formed oxide layer. The indicator layer does not have a matrix / binder. As the device becomes transparent from being highly opaque, any color, message or image printed under it become visible at a pre-determined time, thus making the device self reading. A sealing tape or large label made from an activator and an indicator can be used for sealing boxes and monitoring self-life of perishables inside it. Ink formulations composed of a metal powder and a proper activator can be used for monitoring several sterilization processes, such as sterilization with steam. When water is used as an activator, a thin layer of metals, such as that of aluminum can be used as steam sterilization or humidity indicator. The process can also be used for making patterns, printing plates, electronic circuits and RFIDs (radio frequency identification devices).

The invention relates to the field of air conditioning and purification, in particular to a low-radiation plasma air purification generator and a control system thereof.According to the low-radiation plasma air purification generator and the control system thereof, through the structural design that the intensity of a three-level gradient electric field is gradually enhanced in the gas flowing direction, and in combination with an extended contact path of an S-shaped purification air duct, the air purification efficiency is improved; the reaction time and action intensity of plasma and pollutants are effectively improved, operation information is collected in real time, quantitative analysis is carried out, and operation of the air purification generator is subjected to standardized control, so that operation of the air purification generator can be automatically adjusted; the operation effect of the air purification generator is improved, ionizing radiation and ozone generation are restrained, and the air purification generator is prevented from damaging surrounding electronic equipment and the body health of people.

The present invention relates to the nanoparticles (NP) of the invention, compositions thereof and their use as therapeutic agents, in particular in the field of oncology and / or as imaging agents. The NPs consist of first nanoparticles of at least one high-Z metal oxide material, to which smaller second nanoparticles are covalently bonded at the surface of the first nanoparticles. The second nanoparticles consist of a) at least one noble metal or at least one metal oxide, metal sulfide, metal selenide or metal sulfide / selenide as a Fenton or Fenton-like reaction catalyst. The NPs of the invention produce a surprising therapeutic effect when exposed to ionizing radiation such as X-rays, gamma-rays, protons, neutrons, radioisotopes and / or electron beams. Therefore, these NPs can be used as radiosensitizers in the field of oncology. These nanoparticles can also be used as contrast agents.

The invention relates to the technical field of ionization radiation detection, in particular to an ionization chamber detection device, a measurement system and a use method. An ionization chamber detection device comprises: a housing having an accommodation space in which a mixed reaction gas is accommodated; the at least one separating polar plate is arranged in the accommodating space, and the separating polar plate is used for separating the accommodating space into at least two sections of detection cavities; the at least two signal collecting polar plates are respectively arranged in different detection chambers; and the at least two signal transmission lines are respectively connected with different signal collecting polar plates, one end of each signal transmission line is connected with the signal collecting polar plate, and the other end of each signal transmission line extends out of the shell and is suitable for being connected with a data collecting and processing unit. The invention provides an ionization chamber detection device, a measurement system and a use method, and aims to solve the problem that a conventional ionization chamber is generally used for intensity and dose measurement of regional radiation and is not suitable for position sensitive detection of a space smaller than the sensitive volume of the ionization chamber.

The invention discloses a construction method of an anti-oxidation adhesion type genetically engineered bacterium, the engineering bacterium and application of the engineering bacterium, and relates to the technical field of construction of the anti-oxidation adhesion type genetically engineered bacterium. According to the invention, superoxide dismutase and catalase are subjected to constitutive overexpression in a probiotic chassis by using a synthetic biological technology, and meanwhile, intestinal trefoil factor peptide fused pilin is subjected to overexpression. According to the present invention, the research results show that the active oxygen scavenging ability of the anti-oxidation adhesion type gene engineering probiotic is significantly improved, the adhesion ability of the anti-oxidation adhesion type gene engineering probiotic in the animal intestinal tract is significantly enhanced, and the radiation enteritis symptom caused by the whole abdomen ionizing radiation irradiation can be effectively relieved; the strain can be used as a potential safe viable bacterium medicine for preventing and treating radiation enteritis and other active oxygen related enteritis. The anti-oxidation adhesion type genetic engineering probiotics can be prepared into viable bacteria preparations such as viable bacteria suspension, dairy products, viable bacteria powder, bacterial tablets or capsules, can be proliferated and colonized in human intestinal tracts after being orally taken, and is applied to prevention and treatment of radiation enteritis.

A system includes a cylindrical phantom and a conical structure disposed in the phantom. The conical structure is shaped as a frustum and emits Cherenkov radiation when exposed to ionizing radiation. The system can be used for calibration of an MR-Linac system by exposing the system to ionizing radiation. The Cherenkov radiation can be imaged during exposure to ionizing radiation.

To provide an antireflection film that has both high antireflection properties and superior scratch resistance, and that is capable of acquiring high antifouling property without relying on fluorine-containing compounds, as well as a method for producing such an antireflection film.SOLUTION: An antireflection film 10 comprises: a base film 12; a hard coat layer 14 formed on a surface of the base film 12; and an optical functional layer 16 formed on a surface of the hard coat layer 14. The optical functional layer 16 is formed from a cured product of an ionizing radiation-curable composition that contains a polyfunctional (meth)acrylate compound having a reactive group, and an amino-modified organopolysiloxane, where at least a part of the polyfunctional (meth)acrylate compound and at least a part of the amino-modified organopolysiloxane form an addition reaction product, and that further contains alumina particles surface-treated with a silane coupling agent having a reactive group capable of forming a bond with the polyfunctional (meth)acrylate compound.SELECTED DRAWING: Figure 1

Disclosed herein are methods and devices for the acquisition of positron emission (or PET) data in the presence of ionizing radiation that causes afterglow of PET detectors. In one variation, the method comprises adjusting a coincidence trigger threshold of the PET detectors during a therapy session. In one variation, the method comprises adjusting a gain factor used in positron emission data acquisition (e.g., a gain factor used to multiply and / or shift the output(s) of a PET detector(s)) during a therapy session. In some variations, a method for acquiring positron emission data during a radiation therapy session comprises suspending communication between the PET detectors and a signal processor of a controller for a predetermined period of time after a radiation pulse has been emitted by the linac.

The invention relates to a rare earth ion doped enhanced ionizing radiation luminescence low-dimensional halide scintillator and a preparation method and application thereof, and belongs to the technical field of scintillating materials. Aiming at the problems that the radiuses of RE ions and low-dimensional halide A5B3 (ClxBryI1-x-y) 8 materials are poor in lattice adaptation degree, the melting points of the RE ions and the low-dimensional halide A5B3 (ClxBryI1-x-y) 8 materials are difficult to consider in the doping process, concentration segregation is easy to occur and large-size crystals are difficult to grow, the solid-solution ratio of halogen anions and the doping concentration of the rare earth ions are regulated and controlled, namely 0.25 < = x < = 0.875, 0 < = y < = 1, x + y < = 1 and 0 < m < 10 are controlled; meanwhile, a rotation descent method is adopted for crystal growth, the scintillator single crystal material A5B3 (ClxBryI1-x-y) 8: m at% RE with the advantages of high ionizing radiation luminous efficiency, high light output and the like is finally obtained, and the material can be applied to the fields of X-ray imaging, gamma-ray detection, particle detection and the like.

A decorative sheet and a method for producing the decorative sheet are provided, the decorative sheet having a gloss level of 15 or less and excellent design properties, and also having fingerprint resistance, high durability (in particular, scratch resistance and stain resistance), and processability. A decorative sheet (1) according to the present embodiment includes: a primary film layer (2); and a surface protective layer (5), wherein the surface protective layer (5) has a gloss level of 15 or less, the surface protective layer includes a ridged portion projecting in a ridged pattern from a surface of the surface protective layer to form an uneven shape on the surface, the surface protective layer (5) contains an ionizing radiation-curable resin as a main material, the ionizing radiation-curable resin contains, as a main component, a tetrafunctional acrylic resin having a repeating structure, the number of repetitions of the repeating structure is 12 or more, a content of vinyl groups contained in the ionizing radiation-curable resin is 20% or less relative to carbonyl groups contained in the ionizing radiation-curable resin, and the uneven shape of the surface protective layer (5) has RSm / Ra in a range of 10 or greater and 300 or less.

There is provided a decorative sheet having excellent design properties, i.e., low gloss, and having fingerprint resistance, high durability (particularly scratch resistance or contamination resistance), and processability. A decorative sheet (1) according to this embodiment includes: a base material layer (2); a surface protective layer (5) provided on one surface of the base material layer (2); and a pattern layer (3) provided between the base material layer (2) and the surface protective layer (5), in which the surface protective layer (5) has ridge-like parts provided to project in a ridge-like shape and form an irregular shape on the surface, RSm / Ra of the irregular shape of the surface protective layer (5) is within the range of 10 or more and 300 or less, the surface protective layer (5) contains an ionizing radiation curable resin as a main material, the ionizing radiation curable resin contains, as a main component, a tetrafunctional acrylic resin containing a repeating structure and the repeating structure is any one of the structures of ethylene oxide, propylene oxide, and ε-caprolactone.

The invention provides an anti-ionizing radiation fiber with high filling amount, high strength and high elasticity and a preparation method and application thereof, and belongs to the field of functional fiber materials.The preparation method comprises the steps that rare earth nitrate and citric acid are dissolved in an acidic alcohol aqueous solution, heated and stirred, the pH value is adjusted, sol is obtained, the sol is subjected to secondary heating treatment to obtain gel, and the gel is dried to obtain the high-filling-amount high-strength high-elasticity anti-ionizing radiation fiber. Aging, drying, grinding and calcining the gel to obtain rare earth composite powder; wherein the rare earth nitrate is a mixture of gadolinium nitrate, dysprosium nitrate and cerium nitrate; adding polyurethane into a mixed solution of DMF and xylene, stirring, adding the rare earth composite powder, stirring, and defoaming to obtain a spinning solution; preparing nascent fibers from the spinning solution through wet spinning; and drawing, washing and drying to obtain the anti-ionizing radiation fiber. The anti-ionizing radiation fiber prepared by the invention has excellent shielding property, mechanical property and air permeability.

The invention provides a construction method of a radioactive esophageal injury organ-like model. The construction method comprises the following steps: performing X-ray ionizing radiation on esophageal organs; wherein the esophageal organ comprises a rat esophageal organ, a mouse esophageal organ or a human esophageal organ; the radiation dosage is 0.5 to 4 Gy, and the radiation dosage rate is 1.5 to 2 Gy / min. Experimental results show that along with increase of irradiation dose, connection around spheres of human esophageal organs, mouse esophageal organs and rat esophageal organs is loose, cell debris is increased, and the sizes are smaller than those of normal organs at the same time. The construction of the radioactive esophageal injury organ-like model is of great significance for deeply understanding the injury mechanism of ionizing radiation to the esophagus, searching for effective protection and treatment measures and promoting the development of personalized radiotherapy.

The invention discloses a polycarbonate composite material capable of being subjected to ionizing radiation sterilization as well as a preparation method and application thereof. The polycarbonate composite material capable of being subjected to ionizing radiation sterilization is prepared from the following raw materials in parts by weight: 50 to 100 parts of aromatic polycarbonate, 0.1 to 10 parts of polyether or polyether derivative, 0.1 to 10 parts of impact modifier and 0.01 to 2 parts of o-benzoyl sulfimide, through selection of the raw material components, the prepared polycarbonate composite material capable of being subjected to ionizing radiation sterilization has a relatively low yellowing index and excellent mechanical properties after irradiation, and the problems that the yellowing index is too high and the mechanical properties are reduced after irradiation of an existing polycarbonate material are solved.

The invention discloses a control rod driving mechanism of a small-sized modularized pressurized water reactor, which belongs to the technical field of nuclear, and comprises a protective shell with the radial size of not more than 70mm; a control rod driving main body is mounted in the protective shell, the control rod driving main body comprises a flange which is located at the left end of the protective shell and used for being connected with a reactor cover plate, a precise driving mechanism is arranged on the right side of the flange, and a gear box is mounted on the right side of the precise driving mechanism; a position sensor unit is installed on the right side of the gearbox, and a sealed electrical input end is arranged on the right side of the position sensor unit. The control rod driving mechanism of the small modular pressurized water reactor is compact in size, the stroke exceeds 1.5 m, the movement increment of each time is smaller than 5 mm, it is ensured that operation of a reactor core of the reactor is accurately controlled, and meanwhile the control rod driving mechanism can stably operate under the conditions of high temperature, high pressure, ionizing radiation and corrosion.

The invention provides application of luteolin in prevention of bone marrow-type radiation sickness, relates to the technical field of biomedicine, and provides application of luteolin in preparation of drugs for prevention and treatment of bone marrow-type radiation sickness. The invention discloses an application of luteolin in prevention or treatment of bone marrow type radiation sickness and radioactive hematopoietic system injury, and finds that the hematopoietic system injury caused by ionizing radiation can be slowed down by administration of luteolin before irradiation, specifically, peripheral hemogram is increased, and bone marrow injury is slowed down.

The present invention relates to intracellular copper zinc superoxide dismutase inhibitors for protecting a subject from damage caused by radiation outbreak. The invention also relates to kits comprising SOD1 inhibitors and radiosensitizers for cancer cells, to the in vitro use of SOD1 inhibitors for protecting non-cancer cells from ionizing radiation, and to methods, compositions and uses related thereto.

The invention discloses a vacuum system for precisely controlling the gas density of a nano-dose detector, and belongs to the field of ionizing radiation nano-dose measurement. The system comprises a vacuum pump set unit, a vacuum degree detection unit and a logic control unit. According to the requirements of the nano dose detector for the vacuum degree and the gas concentration, the working air pressure is within 1 Torr and the air pressure control precision reaches 0.01 Torr through cooperation of a pump set in a vacuum system and PLC logic control and data monitoring. The system can provide gas for generating ionizing radiation and a low-vacuum environment for the nano-dose detector, and ensures that a measurement signal of the nano-dose detector is accurate and stable. The ionization degree of the nano dose detector depends on the vacuum degree in the cavity, and the vacuum degree of the cavity depends on the concentration of gas in the sensitive volume. The method has the advantages of high precision, high accuracy, high reliability and the like. According to the invention, the vacuum environment of the nano-dose detector is constant, the sensitive gas is single, and the precise measurement of the nano-dose detector can be supported.

The invention discloses a composite probiotic inulin gel biomass preparation as well as a preparation method and application thereof. Relates to the technical field of food. The raw materials comprise composite probiotics and inulin gel. The invention further provides a preparation method and application. The oral compound probiotic inulin gel preparation provided by the invention is good in safety, and is used for preventing ionizing radiation hematopoietic system injury and radiation enteritis; wherein the inulin gel has a certain protection effect on gastric acid and intestinal juice, and probiotics are protected from being damaged. The inulin gel can prolong the retention of the probiotics in the intestinal tract and enhance the colonization effect of the probiotics in the intestinal tract. The compound probiotics have a certain synergistic effect.

The invention discloses an aviation radiation dose global distribution real-time calculation system based on ground detection equipment, which belongs to the technical field of radiation detection and comprises a ground radiation detection module, a dose simulation module and a data correction module. The ground radiation detection module is used for continuously collecting ionizing radiation data of an atmospheric bottom layer in a calm state and a solar high-energy particle event so as to improve data precision and a signal-to-noise ratio under a weak dose, and the dose simulation module receives latitude and longitude, height and time parameters of an aviation flight path, and calculates a standard atmospheric model and a cosmic ray energy spectrum in combination with the standard atmospheric model and the cosmic ray energy spectrum. The data processing module is used for calculating theoretical dose rates and particle type distribution of different height levels based on a Monte Carlo method and outputting the theoretical dose rates and the particle type distribution, and the data correction module is used for dynamically correcting parameters and weights of simulation results by combining measured data based on a deep learning algorithm of deep learning, so that adaptive fusion of the simulation data and the measured data is realized; and the ground radiation detection module comprises a semiconductor radiation detector, a data acquisition and preprocessing unit, a remote control module and a network communication module. The system has the characteristics of high real-time performance and wide coverage range.

Described is a device for radiotherapy treatment with a high dose rate of ionizing radiation, comprising an accelerating guide (11) of a medical radiofrequency accelerator, at least two simultaneously thermostated resonant cavities (10) and comprising a first pick-up (12), a second pick-up (12B) in at least two resonant cavities (10) and an optical system (20) of the beam.

The invention provides a preparation method and application of a diagnosis and treatment agent for tumor radiotherapy sensitization, and belongs to the field of pharmacy. According to the method, a one-pot method is innovatively adopted to load D-mannose and manganese-coated gold nanoparticles (Au (at) MnO2NPs) into ZIF-8 nanoparticles, and the nano diagnosis and treatment agent (Dman / Au (at) MnO2ZIF-8) for tumor radiotherapy sensitization is prepared. The prepared composite nano diagnosis and treatment agent is enriched in tumor tissues by enhancing permeation and retention effects, releases D-mannose, gold nanoparticles and Mn < 2 + > capable of generating T1 magnetic resonance (MR) imaging signals, and realizes tumor radiotherapy sensitization under the guidance of MR imaging. Besides, D-mannose can further increase the sensitivity of tumor cells to ionizing radiation by inducing protein degradation of a tumor cell programmed death receptor-ligand 1, so that a synergistic treatment effect is achieved, and a new thought is expected to be provided for integration of radiotherapy sensitization and diagnosis and treatment of tumors.

A method for fabricating self-healing glass includes processing a water-based or water-containing oxide material for fabrication of self-healing glass. The method includes performing a thermal annealing process on the material, and manufacturing the self-healing glass from the thermal annealed material.

The invention provides an efficient ionizing radiation extraction process of polygonatum polysaccharide, and belongs to the field of extraction processes of main functional components of traditional Chinese medicinal materials. The rhizoma polygonati is cleaned, drained, cut into slices, freeze-dried, crushed and sieved. The preparation method comprises the following steps: mixing the raw materials, uniformly stirring, then subpackaging in PE bags, sealing, carrying out electron beam radiation extraction, selecting a dose rate of 20kGy / pass, and a radiation absorbed dose of 0-320kGy. Water with the solid-to-liquid ratio of 1: 10-1: 30 is added into the irradiated rhizoma polygonati powder, reflux extraction is carried out 1-5 times and 1-3 h each time, extraction is carried out at the extraction temperature of 70-110 DEG C, crude rhizoma polygonati polysaccharide obtained through extraction is separated and purified through a DEAE-52 chromatographic column, and the refined rhizoma polygonati polysaccharide is obtained. Through the process, the extraction rate of the polygonatum polysaccharide extraction process can be effectively improved.

There is provided a decorative sheet which has excellent designability with a gloss level of 15 or less and which has fingerprint resistance, high durability (particularly, scratch resistance and contamination resistance), and processability (easily laminated to a substrate material and hardly broken), and a method of producing the decorative sheet. A decorative sheet (1) according to the present embodiment includes a primary film layer (2) and a surface protective layer (5), in which the surface protective layer (5) has a gloss level of 15 or less; the surface protective layer (5) has on its surface a ridged portion projecting in a ridged pattern to form an uneven shape; the surface protective layer (5) has a Martens hardness of 20 N / mm2 or greater and 200 N / mm2 or less; the surface protective layer (5) contains as a main material an ionizing radiation curable resin; the ionizing radiation curable resin contains as a main component a tetrafunctional acrylic resin containing a repeating structure; the number of repetitions of the repeating structure is 12 or more; and RSm / Ra of the uneven shape of the surface protective layer (5) is in a range of 10 or more and 300 or less.

The invention relates to the field of quartz crystal component testing, in particular to a batch test implementation device for radiation resistance of SMD (Surface Mount Device) packaged crystal oscillators, which is used for solving the problems of incapability of batch detection and low test efficiency in the prior art. According to the invention, a plurality of SMD packaged crystal oscillators to be tested are installed on a power-on part, and an electric connection and output signal transmission path is provided for the SMD packaged crystal oscillators; the radiation-resistant protection part is arranged below the power-on part, covers the monitoring control part and is used for isolating ionizing radiation for the monitoring control part; the monitoring control part is arranged below the radiation-resistant protection part and is mounted in the fixed part in an embedded manner; the power-on part, the radiation-resistant protection part and the fixing part are detachably and fixedly connected. According to the invention, the efficient batch performance test of the SMD packaged crystal oscillator is realized.

The utility model relates to the technical field of ionizing radiation monitors, in particular to an ionizing radiation monitor which comprises a protective shell, the top surface of the protective shell is in sliding connection with two protective covers, and a monitor body is arranged in the protective shell; the movable assembly is arranged on one side of the protection shell and used for driving the two protection covers to move, when the monitor body is disassembled, a first adjusting block is rotated to drive a threaded rod to rotate, and when the threaded rod rotates, one rack can be driven to move; when one rack moves, the other rack is driven to move through cooperation of a gear, when the two racks move, the distance between the two L-shaped plates can be adjusted through the two sliding blocks, after one ends of the two L-shaped plates are separated from the two clamping grooves, limiting of the monitor body can be relieved, and at the moment, the protection shell can be separated from the monitor body; and therefore, the protective shell or the monitor body can be replaced conveniently, and the practicability of the device is enhanced.