85 results about "Radiation reaction" patented technology

Normal tissue complications limit curative broadbeam radiotherapy to tumors including lung cancer. Radiation retinitis causing blindness limits quality of life and long term survival for patients with ocular melanoma. This invention pertains to alternative, normal tissue sparing 100 to 1,000 Gy microbeam radiations with least normal tissue complications and concomitant radio-immunotherapy by innate immune response of epidermis and dermis to low dose radiation with 50 kV X-rays. Total body skin radiation with former airport passenger screening machines with 50 kV X-ray is disclosed. Microbeams are generated without contaminating scatter and neutron radiations from collinear gamma ray and electron beam produced by inverse Compton interaction with high energy laser and electron beam and from proton and carbon ion beams in tissue equivalent cylindrical collimators. Extracorporeal immunotherapy and chemotherapy and apheresis of mutated subcellular particles released into circulation in response to cancer-therapies are by clinical continuous flow ultracentrifugation combined chromatography.

The invention relates to a method for preparing a drug carrier based on a magnetic carbon quantum dot/chitosan composite microsphere. The method specifically comprises the following steps of: (1) carrying out a coprecipitation reaction on bivalent and trivalent iron salts in an alkaline aqueous solution so as to prepare nano magnetic ferroferric oxide; (2) carrying out microwave radiation reaction on a glucose and polyethylene glycol mixed solution to prepare carbon quantum dots, and forming magnetic carbon quantum dot composite particles through electrostatic adsorption; (3) reacting the chitosan which is dissolved in a mixed solution of sodium methoxide/absolute methanol with nitric oxide in a high-pressure kettle, and forming a chitosan-nitric oxide addition product; and (4) dropwise adding the magnetic carbon quantum dots into the addition product, and forming the magnetic carbon quantum dot/chitosan composite microsphere through electrostatic adsorption. Compared with the prior art, the method is simple, rapid, low in cost, and the prepared product can be developed into the drug carrier which integrates magnetic targeting, fluorescence imaging or tracing, nitric oxide in-situ release and fluorescence detection.

The present invention discloses a preparation method of castor-oil base branched polybasic cyclic carbonate and non-isocyanate polyurethane thereof. The method is as below: raw materials of 10-undecylenic acid modified castor-oil base branched polyenoid prepolymer and thiol cyclic carbonate and a solvent chloroform are subjected to UV radiation reaction in the presence of a photoinitiator for 6-15 h to obtain a castor-oil base polybasic branched cyclic carbonate prepolymer; and the prepolymer further reacts with an amino compound to prepare the castor-oil base non-isocyanate polyurethane. The preparation of the cyclic carbonate does not require high temperature, high pressure or catalyst, and can well control the graft number of cyclic carbonate groups in the vegetable oil; and the prepared cyclic carbonate has branched structure and lower viscosity, and has long space group from a vegetable oil connection point, so that the cyclic carbonate group at the end has very high reactivity. The castor-oil base polyurethane material has the advantages of biodegradability and high content of renewable carbon, and can be used as renewable polyurethane resin for paint.

A microwave process for preparing the water-soluble core/shell quantum point of CdTe/CdS with high fluorescent quantum efficiency includes such steps as mixing the salt or oxide of Cd with water-soluble mercapto compound in water phase, filling the solution of CdTe nanocrystal to obtain the precursor solution of CdTe/CdS, filling in glass tube, and microwave irradiating in microwave reactor.

The invention provides a method for obtaining pure inelastic scattering gamma-ray energy spectra in stratum element well logging. The method includes the following steps that the inelastic scattering gamma-ray energy spectra and capture gamma-ray energy spectra of a target stratum are obtained according to well logging materials, wherein the inelastic scattering gamma-ray energy spectra include the capture radiation reaction influence; the inelastic scattering gamma-ray energy spectra including the capture radiation reaction influence are segmented by the adoption of the feature of the elements in the known stratum and the feature of the capture gamma rays, and corresponding deduction coefficients are arranged for all the energy spectrum segments; according to the deduction coefficients of all the energy spectrum segments and the deduction amount determined by the product of the capture gamma-ray energy spectra of the corresponding energy spectrum segments, the influence of the capture radiation reaction is deducted from the inelastic scattering gamma-ray energy spectra of the corresponding energy spectrum segments so as to obtain the pure inelastic scattering gamma-ray energy spectra of the target stratum. By means of the method, the more pure inelastic scattering gamma-ray energy spectra can be obtained.

The present invention relates to new microwave radiation process for producing potassium sulfate. The process includes the following steps: mixing potassium chloride and industrial sulfuric acid in certain weight ratio in an anticorrosive reactor, radiating with 600-50,000 MHz microwave while stirring to react at 400-800 deg.c for 5-60 min to produce potassium sulfate, cooling and crushing to obtain potassium sulfate product, and cooling the produced hydrogen chloride gas and absorbing with water in an absorbing tower to produce hydrochloric acid as the side product. Compared with available technology, the present invention has the advantages of high reaction speed, short production period, high product quality, no environmental pollution, etc.

The invention provides a preparation method of nitrogen-doped graphene quantum dot dispersion liquid. The preparation method comprises the following steps: placing a glucose-ammonium water mixed solution in a microwave-resisting non-sealed container, and carrying out the microwave radiation reaction; stirring the liquid obtained in the reaction at a low temperature, heating to remove excessive ammonium water, placing the liquid into a dialysis bag, centrifuging to accelerate the dialysis purification to obtain the nitrogen-doped graphene quantum dot dispersion liquid. According to the preparation method, a one-step synthetic method is adopted, the glucose is used as a carbon source, ammonium water is used as a nitrogen source and a drive agent, the microwave radiation is used as assistance, and the synthetic rate from the polymerization of glucose, nitrogen doping, carbonization to the formation of nitrogen-doped graphene quantum dots is extremely increased; the method is simple in process, easy for obtaining raw materials, rapid in reaction and environment-friendly; the prepared nitrogen-doped graphene quantum dot is good in monodispersity, high and adjustable in photoluminescent properties, excellent in solubility, good in application prospect in the fields of biological imaging, fluorescent probes and the like, and suitable for industrialized mass production after being amplified in the pilot test.

A method of forming a capsule assembly which includes radiation-reactive dental restorative material includes exposing selected portions of an exterior surface of the container to laser generated radiation at an energy level sufficient to create indicia on the exterior surface, with the indicia having a sufficient contrast relative to the exterior surface to enable readily visual human and/or optical machine-readable detection of the indicia. The indicia identify characteristics of the radiation-reactive dental restorative material in the container, the container is formed from a laser-enhanced (LE) polymer which is inert relative to the radiation-reactive dental restorative material within the container. The ability of the container to dispense the radiation-reactive dental restorative material under pressure is not adversely affected by the exposure of the container to laser generated radiation when creating the indicia on the exterior surface of the container. Optionally, the exposure of the laser-enhanced (LE) polymer to laser generated radiation is done at an energy level sufficient to create one or more raised protrusions on the container, useful for engaging a resilient cap adjacent an orifice on the container.

The invention discloses a composite ceramic dispersant and a preparation method, which belongs to the ceramic additive preparation filed. The composite ceramic dispersant is composed of 35-60% of sodium humate, 1-10% of polyacrylamide, 1-20% of sodium polyacrylat, 1-3% of potassium persulphate and the balance of water by weight percentage, and the preparation method comprises the following steps: preparing a mixing solution, performing a microwave radiation reaction, and grinding. The composite ceramic dispersant has the advantages of strong versatility, less amount and good effect, and the ceramic slurry and glaze slip can reach the required fluidity by the used composite ceramic dispersant under condition that water content is reduced as possible.

The invention provides a preparation method of a hydrogenation catalyst. The catalyst is Pd-CeO2/active-carbon catalyst. The preparation method comprises the following steps: (A) pretreatment for the active carbon; (B) preparation of a CeO2/active-carbon composite carrier: dissolving cerate in alcohol, mixing the solution with the active carbon treated by acid, using NaOH solution or KOH solution to regulate pH value of the formed solution to 9-13, putting the solution with regulated pH value into a microwave device to carry out microwave radiation reaction, carrying out washing, solid-liquid separation and drying on obtained products to obtain the CeO2/active-carbon composite carrier; and (C) preparation of the Pd-CeO2/active-carbon catalyst: dispersing the composite carrier in water, mixing with methanol and chloropalladic acid solution, carrying out photoreduction on the mixed solution under the ultraviolet light, and carrying out solid-liquid separation and drying on the obtained products to obtain the Pd-CeO2/active-carbon catalyst. The preparation method provided by the invention is simple and is short in production cycle, and the obtained catalyst is good in dispersibility and high in catalytic activity.

The invention discloses a method for preparing a diphenyl ethylene compound through a decarboxylic reaction. The method comprises the following steps of: performing a microwave radiation reaction on a 2,3-diaryl acrylic acid compound in polyethylene glycol by taking cuprous iodide and phenanthroline as catalysts; and purifying to obtain a diphenyl ethylenes compound. A substrate used in the method has the advantages of wide application range, predictability of the cis-trans configurations of raw materials, simple process, environment friendliness, low cost and high yield.

The invention provides waterborne polyurethane textile size based on graphene modification and a preparation method thereof. The preparation method includes: adding graphene into a concentrated sulfuric acid and potassium permanganate solution, stirring, dropwise adding distilled water, performing water-bath oxidization to obtain graphene oxide, and washing and performing centrifugal ultrasonic treatment to obtain a graphene oxide aqueous solution; allowing the graphene oxide to have reaction with aryl diazonium salt to obtain acryl-modified graphene, and allowing the acryl-modified graphene to have microwave radiation reaction with a waterborne polyurethane solution to obtain a graphene/polyurethane solution; adding ethylene glycol, nano titanium dioxide, calcium carbonate and hydroxyethyl cellulose into the graphene/polyurethane solution, heating and stirring, and grinding to obtain the waterborne polyurethane textile size based on the graphene modification. The waterborne polyurethane textile size prepared by the method has the advantages that the waterborne polyurethane textile size is good in stability and film forming performance, and the formed film is soft and tough and has functions of resisting heat and static.

The invention discloses a method for desulphurization through oxidation of high-sulfur coal with combination of microwaves and auxiliary agents. The method comprises the following steps: wetting agents and reaction auxiliary agents are added in crushed coal dust, stirring is carried out for certain time, the reaction auxiliary agents and the coal dust are separated through filtering, the coal dust after reaction is placed under microwave radiation and a reaction is carried out; after irradiation is carried out for certain time, low-sulfur coal after desulphurization is obtained through washing filtering. The desulfurization rate of the method is high, and damage to the coal structure is slight, and the method has a removal effect on both organic sulfur and inorganic sulfur. The reaction auxiliary agents are cheap, easy to recycle and have little corrosion to devices. The microwave radiation reaction time is short and the efficiency is high. The coal dust and the reaction auxiliary agents are contacted and mixed fully, and the desulfurization rate is high.

A monoimine pyridine compound is prepared through proportionally mixing 2-acetyl-6-ethoxycarbonyl pyridine with substituted amine, microwave radiation reaction to obtain coarse product, and purifying by chromatography. The catalyst containing said compound and its application are also disclosed.

The invention relates to a conformal radiotherapy tissue equivalent compensation adhesive, a preparation method and application thereof. The conformal radiotherapy tissue equivalent compensation adhesive comprises an uncured layer and a cured layer, wherein the outer layers of the uncured layer and the cured layer are wrapped with protective layers, and the uncured layer and the cured layer are prepared from same raw material components. The uncured layer and the cured layer are prepared from, by weight, 70-90 parts of liquid rubber, 8-12 parts of epoxy soybean oil acrylate, 3-5 parts of 2(2-ethoxyethoxy) ethylacrylate and 0.2-0.8 part of bis(2,6-difluoro-3-(1-hydropyrrol-1-yl)phenyl)titanocene. The preparation method is simple, and application steps are easy to operate. The tissue equivalent compensation adhesive prepared by using the liquid rubber and the epoxy soybean oil acrylate as the raw materials is soft and comfortable, has a good degree of skin attachment to a patient, can effectively prevent cavity generation and reduce the secondary build-up effect of high-energy rays, can be formed according to conditions of an irradiation site of the patient, has high repeatability precision, and can ensure the accuracy of absorbing dose amount of tissues and reduce radiation reactions.

The invention discloses a device for degrading a pollutant with electron beam radiation. An injection pump is used for injecting solvent, absorbent and liquid to be treated in a liquid storage tank into a mixer after the solvent, absorbent and liquid to be treated in the liquid storage tank are mixed by a four-way valve in different proportion; the mixed liquid is fully mixed under the action of a magnetic stirrer; a liquid buffer tank receives the mixed liquid which effuses from the upper outlet of the mixer; and a compression pump at a liquid inlet pumps the mixed liquid in the liquid buffer tank into a radiation reaction box to degrade the mixed liquid with radiation. The device can automatically and continuously radiate to degrade organic halogen which is difficult to degrade; and a matched remote control system and a working condition system are independently developed for self-fault diagnosis and manual remote safety monitoring, so that all the performances of the radiation degradation device can be improved.

The invention relates to the technical field of reaction devices, in particular to a microwave radiation reaction system. The microwave radiation reaction system comprises a microwave excitation cavity, a compression excitation cavity, a positioning rack, a spiral pipe and a microwave source, wherein the compression excitation cavity is formed in the microwave excitation cavity, the positioning rack is arranged between the microwave excitation cavity and the compression excitation cavity, the spiral pipe is installed on the positioning rack, and a solution inlet and a solution outlet are formed in the two ends of the spiral pipe. The solution inlet and the solution outlet are formed in the outer wall of the microwave excitation cavity, and a plurality of microwave sources are arranged on the outer wall of the microwave excitation cavity. The spiral pipe type microwave reactor has the advantages that the electric field intensity and uniformity are improved through the structure, the irradiation time is prolonged, the reaction time is prolonged, and the reaction efficiency is improved.

The invention discloses a preparation method of flame-retardant and wear resistant foam asphalt. The preparation method comprises the steps of firstly taking and weighing asphalt, blowing agent, alkylxanthate, calcium chloride, molecular sieve, silicone resin, flame retardant, filler and water by weight, secondly adding the calcium chloride, the molecular sieve and the silicone resin to a microwave-radiation reaction vessel and then heating, stirring and reacting to obtain a hybrid adsorbent, thirdly heating the asphalt to 110 to 120 DEG C and then adding sequentially the blowing agent, thealkyl xanthate, the flame retardant and the filler to produce modified asphalt, fourthly stirring and mixing the hybrid adsorbent in step two and the modified asphalt in step three under 110 to 120 DEG C and then adding water to produce the flame-retardant and wear resistant foam asphalt. The flame-retardant and wear resistant foam asphalt has the advantages of high expansion rate, large half lifevalue, good liquidity, high wettability, good flame-retardant and smoke suppression effect, and excellent wear resistant property.

The invention relates to a microwave-assisted high-efficiency method for synthesizing 5-cyanouracil, which comprises the following steps: carrying out microwave radiation on urea, malononitrile and triethyl orthoformate at the microwave reaction temperature of 60-80 DEG C under the microwave power of 500W under atmospheric pressure for 8-20 minutes, and filtering the residual triethyl orthoformate out of the reaction system to obtain a dicyan intermediate I; dissolving the obtained solid in a sodium ethylate 1.0-2.0 mol/L solution, carrying out radiation reaction at the microwave reaction temperature of 30-50 DEG C under the microwave power of 300W under atmospheric pressure for 30-50 minutes, adding activated carbon for decolorization, filtering, and acidifying the filtered precipitate with glacial acetic acid to obtain an intermediate II; and adding 2.5-3.0 mol/L dilute hydrochloric acid into the intermediate II, carrying out radiation at the microwave reaction temperature of 80-100 DEG C under the microwave power of 500W under atmospheric pressure for 30-50 minutes, cooling, and filtering to obtain the 5-cyanouracil.

The invention belongs to the technical field of dye waste water treatment, and relates to a method for treating dye waste water by virtue of ultraviolet photocatalysis. The method comprises the following steps: uniformly mixing the dye waste water under a rapid stirring condition, adding a two-dimensional layered material MXene photocatalyst, controlling the mass percentage concentration of the two-dimensional layered material MXene photocatalyst in the system at 0.01 to 5 percent, and uniformly mixing; and starting an ultraviolet light source, and performing uniform radiation reaction for 10to 200 minutes under a stirring condition. The method is simple in process, the prepared MXene material is good in photocatalytic performance, high in chemical stability, easy to filter and separate,free from producing secondary pollution to the waste water, capable of avoiding the introduction of acid, alkali, oxidant and the like, high in reaction efficiency and significant in economic benefit.