32 results about "Ionizing irradiation" patented technology

This invention provides a radiation dosimeter and new method of operation which comprise two types of the metal-oxide-semiconductor field-effect transistor (MOSFET) circuits allowing to amplify the threshold voltage changes due to radiation and provide temperature compensation. The first type dosimeter is a radiation integrated circuit (RADIC) which includes two radiation field-effect transistors (RADFET) and two MOSFETs, integrated into the same substrate. The second type of radiation circuit includes two RADFETs, integrated into the same substrate, and two resistors. The amplification of the threshold voltage change is achieved by using amplification principles of an MOSFET inverter. In both cases, under the ionizing irradiation, the gate of first RADFET is forward biased and the gate of second RADFET is biased off. In the reading mode the amplified differential threshold voltage change is measured. The increased radiation sensitivity allows to measure of the milli-rad doses. The temperature effect and drift is substantially eliminated. These radiation integrated circuits can be used as a personal dosimeter in the nuclear, industrial and medical fields.

A method of curing a protective overcoat layer on the outermost portion of an organic photoconductor drum using dual curing process is provided. The first curing step applies either ionizing irradiation, such as with an electron beam or by gamma rays or applies non-ionizing irradiation such as ultraviolet light to the overcoated photoconductor drum. A mask or shield is sized to be placed over the print area of the initially cured photoconductor drum, thereby exposing the outermost edges of the photoconductor drum. The outer edges of the masked photoconductor drum is then exposed to a second curing step using non-ionizing irradiation such as ultraviolet light.

A laminate including a resin layer and a metal layer, the resin layer being obtained by modifying at least part of the surface of a resin film including a thermoplastic cyclic olefin resin by ionizing irradiation, and the metal layer being formed on the modified area of the surface of the resin film by plating, a method of producing the same, and an electronic circuit board including a circuit formed by etching the metal layer of the laminate by photolithography, are disclosed. The laminate ensures that the insulating resin layer (flat surface) exhibits high adhesion to the conductor layer.

The present invention provides methods for treating a subject that has suffered combined exposure to total body ionizing irradiation and burns by administering a peptide of at least 5 amino acids of a peptide of SEQ ID NO:1 (Asp-Arg-Nle-Tyr-Ile-His-Pro), or a pharmaceutical salt thereof in an amount effective to treat the radiation effects and / or the burn.

Disclosed herein are methods of terminally sterilizing bacterial minicells or compositions comprising bacterial minicells by exposure to ionizing irradiation. Also disclosed are terminally sterilized bacterial minicells, pharmaceutical compositions comprising the bacterial minicells, and methods of use the bacterial minicells and pharmaceutical compositions.

The invention discloses a method for degrading moxifloxacin hydrochloride in waste water. Hydroxyl radicals.OH which is high in oxidizing ability and generated through ionizing irradiation are used for promoting degrading of moxifloxacin hydrochloride in the waste water, and Cu2+ and Zn2+ are added into the waste water to catalyze degrading of moxifloxacin hydrochloride, reduce the absorption dose required by waste water irradiation treatment and reduce cost. According to the specific scheme, a certain amount of Cu2+ and Zn2+ are added into the moxifloxacin hydrochloride waste water with the concentration being 10 mg / L-100 mg / L, the concentration range of Cu2+ is 0.2-0.6 mg / L, the concentration range of Zn2+ is 0.4-0.8 mg / L, irradiation treatment is carried out through gamma rays or high-power electron beams, the dose ranges from 1kGy to 3kGy, and therefore moxifloxacin hydrochloride has an irradiation degrading reaction. Cu2+ and Zn2+ are used at the same time for joint irradiation treatment, the use amount of Cu2+ and Zn2+ is reduced, and secondary pollution is reduced. Meanwhile, the irradiation dose is greatly reduced, the treatment effect is good, secondary pollution is little, and energy is saved.

The invention belongs to the technical field of sewage treatment, and in particular relates to a method for removing refractory organic pollutants in water by intensified ionizing radiation, comprising: uniformly mixing waste water containing organic pollutants with a certain amount of MOF or its derivative materials, and performing ionization Irradiation treatment. The method has high irradiation efficiency and can be carried out at normal temperature. The MOF material can be reused, and can be applied to the treatment of refractory industrial wastewater such as effluent from urban sewage plants, pharmaceutical wastewater, and dye wastewater.

The invention relates to the field of drug development against acute radiation injury caused by exposure to high-energy electromagnetic waves (X-rays, gamma rays) or particles (alpha particles, beta particles, neutrons). To date, there is no effective drug to ameliorate radiation injury after accidental exposure to ionizing irradiation. The invention provides a method of treating radiation injury of a subject in need thereof comprising administering to the subject a peptide, or functional analogue or derivative thereof, of smaller than 30 amino acids. Furthermore, the invention provides use of a peptide, or functional analogue or derivative thereof, of smaller than 30 amino acids for the production of a pharmaceutical composition for the treatment of a subject suffering from or believed to be suffering from radiation injury. In particular, the invention provides anti-radiation peptides having a dose reduction factor (DRF) against acute gamma irradiation of at least 1.10, said DRF determinable by testing which dose of radiation results in 50% mortality at 30 days (LD50 / 30) after whole body radiation (WBI) in a test group of mice treated with said peptide at 72 hours after WBI and, testing which dose of radiation results in 50% mortality at 30 days (LD50 / 30) after whole body radiation (WBI) in a control group of mice treated only with the vehicle of said peptide at 72 hours after WBI and wherein the DRF is calculated by dividing the LD5O / 3O of the peptide-treated animals by the LD50 / 30 of the vehicle-treated animals.

The invention relates to and is applicable to the technical field of electronics, in particular to a radiation-proof strengthening method for a bipolar device based on the geometric structure of an emitter region. The radiation-proof strengthening method aims to solve the problems that an existing bipolar junction transistor and a circuit are high in damage degree of current gain in a space radiation environment, and an existing bipolar device is low in radiation resistance ability. According to the radiation-proof strengthening method for the bipolar device, the traditional bipolar device process is reserved, and manufacturing process steps are very simple. By means of the radiation-proof strengthening method for the bipolar device, the influence of positive charges captured by oxide induced through ionizing irradiation and the interface state on performance parameters of the device can be lowered substantially by improving the geometric structure of the emitter region, and the radiation resistance ability of the bipolar device is enhanced remarkably by 2-5 times compared with that of the existing bipolar device.

The invention discloses a method for degrading moxifloxacin hydrochloride in waste water. Hydroxyl radicals.OH which is high in oxidizing ability and generated through ionizing irradiation are used for promoting degrading of moxifloxacin hydrochloride in the waste water, and Cu2+ and Zn2+ are added into the waste water to catalyze degrading of moxifloxacin hydrochloride, reduce the absorption dose required by waste water irradiation treatment and reduce cost. According to the specific scheme, a certain amount of Cu2+ and Zn2+ are added into the moxifloxacin hydrochloride waste water with the concentration being 10 mg / L-100 mg / L, the concentration range of Cu2+ is 0.2-0.6 mg / L, the concentration range of Zn2+ is 0.4-0.8 mg / L, irradiation treatment is carried out through gamma rays or high-power electron beams, the dose ranges from 1kGy to 3kGy, and therefore moxifloxacin hydrochloride has an irradiation degrading reaction. Cu2+ and Zn2+ are used at the same time for joint irradiation treatment, the use amount of Cu2+ and Zn2+ is reduced, and secondary pollution is reduced. Meanwhile, the irradiation dose is greatly reduced, the treatment effect is good, secondary pollution is little, and energy is saved.

The present invention relates to a system, a method and a filler for measuring a dose of ionizing radiation received by a pre-determined part of the body during radiotherapy while creating a space between the organ to be irradiated and organs to be protected. The invention also relates to uses of such filler. The system comprises an injectable dosimetric filler, which under the influence of ionizing irradiation undergoes measurable physical and / or chemical changes, while preserving its spatial integrity; a detector system for measuring the physical and / or chemical changes within the radiation sensitive filler by sending an energy wave to the radiation sensitive filler and capturing the signal emitted therefrom; and a control unit for processing the signal captured by the detector system and calculating a dose of ionizing radiation previously or simultaneously received by each part of the volume of the radiation sensitive filler on the basis of said signal.

Disclosed herein are methods of terminally sterilizing bacterial minicells or compositions comprising bacterial minicells by exposure to ionizing irradiation. Also disclosed are terminally sterilized bacterial minicells, pharmaceutical compositions comprising the bacterial minicells, and methods of use the bacterial minicells and pharmaceutical compositions.

The invention discloses a method for improving the performance of a lead-free ferroelectric film and the lead-free ferroelectric film prepared by the same, in particular to a method for reducing the drain current of a lead-free ferroelectric film by utilizing the ionizing irradiation effect and the lead-free ferroelectric film obtained by the same, belonging to the field of lead-free ferroelectric films. Energy carrying particle beams such as charged particles or gamma rays and the like are used for irradiating the lead-free ferroelectric film at room temperature, the total irradiation dose is 10Mrad-100Mrad, and the ferroelectric film with the reduced drain current can be obtained after irradiation. The invention has significance of improving the working stability and the service life ofa ferroelectric memory and reducing the heating productivity.

The invention relates to a method for inducing the defect annealing based on ionization irradiation, and aims at solving a problem that the particle radiation will cause the displacement damage to a device. The method comprises the steps: calculating the ionization / displacement absorbed dose and range of unit fluence incident particles based on a Monte Carlo computing method; determining the typeof incident particles according to the proportional relation between the ionization and the displacement absorbed dose and the features of a sample, thereby guaranteeing that the incident particles can promote the annealing of existing defect in the sample in a conveying process of the sample. The method is simple in steps, and is easy for operation. The method is used for the technical field of spatial environment effects, nuclear science and application technologies.

The invention provides an integrated treatment method of heavy metal passivation and nutrient nitrogen and phosphorus recovery for domestic animal sewage. Heavy metal element passivation and activation and release of nutrients nitrogen and phosphorus are achieved by adopting an integration technology of ionizing irradiation / iron-carbon micro-electrolysis fluidized bed, and efficient recovery of the nutrients nitrogen and phosphorus is achieved by adopting an integration technology of disc tube reverse osmosis / struvite crystal / hydrated molten iron oxide-carrying hot carbon. The copper-zinc-lead-chromium passivation rate is greater than 90%, the nitrogen element recovery rate is greater than 90% and the phosphorus element recovery rate is greater than 95%.