289 results about "Nuclear material" patented technology

Quantitative object and spatial arrangement-level analysis of tissue are detailed using expert (pathologist) input to guide the classification process. A two-step method is disclosed for imaging tissue, by classifying one or more biological materials, e.g. nuclei, cytoplasm, and stroma, in the tissue into one or more identified classes on a pixel-by-pixel basis, and segmenting the identified classes to agglomerate one or more sets of identified pixels into segmented regions. Typically, the one or more biological materials comprises nuclear material, cytoplasm material, and stromal material. The method further allows a user to markup the image subsequent to the classification to re-classify said materials. The markup is performed via a graphic user interface to edit designated regions in the image.

This invention provides a method for deriving precursors to pluripotent non-embryonic stem (P-PNES) and pluripotent non-embryonic stem (PNES) cell lines. The present invention involves nuclear transfer of genetic material from a somatic cell into an enucleated, zona pellucida free human ooplastoid having a reduced amount of total cytoplasm. The present invention provides a new source for obtaining human and other animal pluripotent stem cells. The source utilizes as starting materials an oocyte and a somatic cell as the starting materials but does not require the use, creation and/or destruction of embryos or fetal tissue and does not in any way involve creating a cloned being. The oocyte never becomes fertilized and never develops into an embryo. Rather, portions of the oocyte cytoplasm are extracted and combined with the nuclear material of individual mature somatic cells in a manner that precludes embryo formation. Murine, bovine, and human examples of the procedure are demonstrated. Subsequently, the newly constructed P-PNES cells are cultured in vitro and give rise to PNES cells and cell colonies. Methods are described for culturing the P-PNES cells to yield purified PNES cells which have the ability to differentiate into cells derived from mesoderm, endoderm, and ectoderm germ layers. Methods are described for maintaining and proliferating PNES cells in culture in an undifferentiated state. Methods and results are described for analysis and validation of pluripotency of PNES cells including cell morphology, cell surface markers, pluripotent tumor development in SCID mouse, karyotyping, immortality in in vitro culture.

The invention provides a multifunctional nuclear shell structure drug carrier material and a preparation method thereof; the preparation method comprises the following steps: step one, adopting a solvent-thermal method for preparing monodispersed ferroferric oxide magnetic nanoparticles with grain diameter of about 60nm as ferromagnetic nuclear material of the nuclear shell structure; step two, adopting a sol-gel method for cladding an imporous silicon dioxide layer and a meso-porous layer outside ferromagnetic nucleus in sequence; step three, adopting the sol-gel method for loading a layer ofup-conversion fluorescent material NaYF4: Yb, Er on the material obtained in the step two, wherein the molar concentration of Yb occupies 17% of Y concentration, and the molar concentration of Er occupies 3% of Y concentration. In the invention, an inertia SiO2 layer is designed between the magnetic nucleus and post-functionalized rare earth luminescent material for separating magnetic material from a rare earth luminescent layer so as to prevent fluorescent quenching; up-conversion fluorescent powder with higher fluorescent efficiency is used as fluorescent material; and the sol-gel method with mild reaction condition and uniform dispersion is adopted for forming the nuclear shell structure.

The present specification discloses an X-ray scanning system with a non-rotating X-ray scanner that generates scanning data defining a tomographic X-ray image of the object and a processor executing programmatic instructions where the executing processor analyzes the scanning data to extract at least one parameter of the tomographic X-ray image and where the processor is configured to determine if the object comprises a liquid, sharp object, narcotic, currency, nuclear materials, cigarettes or fire-arms.

A radioisotope identification and localization device having at least one radiation detector with three dimensional event localization that utilizes a spatial correlation of projection vectors arising from Compton scattering of gamma ray emissions. Source identification and location is supplied by a reconstruction that searches for solutions with radioactive material of unknown type. Detection, identification and localization does not require full energy deposition. Identification and location of known or unknown radioactive material somewhere in a large active area of interrogation is achieved.

The invention belongs to the field of micron-nanometer material preparation and application, more particular relates to a multi-cavity composite micron/nanometer capsule and a multi-cavity micron/nanometer ball as well as the preparation method and device thereof. The multi-cavity composite micron/nanometer capsule is of a ball structure with micron and nanometer size, a plurality of cavities are arranged inside the ball, and the number of the cavities can be controlled; the cavities are separated and mutually independent by inner walls made of shell material; the cavities can respectively load different nuclear materials or same nuclear material, and the variety, the number and the distribution in the ball can be accurately controlled; the nuclear materials are mutually independent, do not contact mutually and do not contact with the outside environment directly; the shell material which forms the multi-cavity composite micron/nanometer capsule is different from the nuclear material; and the nuclear materials are selectively removed to obtain the micron/nanometer structure with multiple cavities. The preparation method is a multiple-fluid composite electric injection method, and the device has the characteristic that a multiple-fluid composite spray head is adopted. The multi-cavity micron/nanometer capsule provided by the invention is applied to coatings for environment sensitive materials and reactive materials, and the like.

In one example, a method of examining contents of an object is disclosed comprising scanning an object by first and second radiation beams at at least first and second angles, detecting radiation at the first and second angles, and determining whether the object at least potentially comprises high atomic number material, which may be nuclear material or shielding material, based, at least in part, on the detected radiation. In one example, the detected radiation at both angles must be indicative of a region of high atomic number material by the presence of corresponding high density regions, in order for it to be concluded that high atomic number material that may be nuclear material may be present. The determination may be further based on the size of a high density region in one of the images. Systems are also disclosed.

Propulsion from combustion of solid propellant pellet-projectiles for providing a useful propulsion that has the advantages of both solid and liquid propulsion engines, and also can make use of either solid chemical propellants or fissionable nuclear material as the fuel. Preferred methods and systems can include a storage chamber for storing solid propellant pellets, a feeding system having a pellet feeding channel and a pellet feeding mechanism connected to the storage chamber and to a gun assembly, which is positioned along a longitudinal axis to eject the pellets at a certain velocity. A triggering system positioned between gun assembly and thrust chamber can initiate the propellant pellet-projectile, and a thrust chamber having a combustion chamber for combustion of propellant pellet-projectile with an exhaust nozzle. Additionally, an auxiliary power system can be used to power the components and various electrical and electronic systems that may be present in the invention for controlling the engine components. The gun assembly may include an ejector mechanism for ejecting the propellant pellets through at least one barrel. The triggering system can produce a medium creating an ambience for the initiation of propellant pellet-projectiles. Methods and systems can be used for space and rocket crafts, turbojets and ramjets.

A safe, reliable and rapid system for the detection of nuclear materials within containers includes the use of pulsed high-intensity gamma rays that can penetrate a container and its contents and can be detected outside the container to provide a display in which high-Z material, including lead, uranium, plutonium and other nuclear substances that absorb gamma rays are detected as black regions on the display. In one embodiment, orthogonal pulsed gamma ray beams illuminate the container from two different directions to provide three-dimensional slices from which the existence and location of nuclear threat materials can be ascertained in as little as four seconds for a 40-foot container.

The present invention provides for a composition comprising an inorganic scintillator comprising an optionally lanthanide-doped strontium-barium, optionally cesium, halide, useful for detecting nuclear material.

A system and method for detecting metal contraband such as weapons related material in shipping containers where a container is scanned with at least one penetrating beam, preferably a tomographic x-ray beam, and at least one image is formed. The image can be analyzed by a pattern recognizer to find voids representing metal. The voids can be further classified with respect to their 2 or 3-dimensional geometric shapes. Container ID and contents or bill of lading information can be combined along with other parameters such as total container weight to allow a processor to generate a detection probability. The processor can use artificial intelligence methods to classify suspicious containers for manual inspection.

The present invention provides for a composition comprising a crystal composition or inorganic scintillator comprising a thallium doped sodium iodide, cesium iodide, or lithium iodide scintillator useful for detecting nuclear material.

Propulsion from combustion of solid propellant pellet-projectiles for providing a useful propulsion that has the advantages of both solid and liquid propulsion engines, and also can make use of either solid chemical propellants or fissionable nuclear material as the fuel. Preferred methods and systems can include a storage chamber for storing solid propellant pellets, a feeding system having a pellet feeding channel and a pellet feeding mechanism connected to the storage chamber and to a gun assembly, which is positioned along a longitudinal axis to eject the pellets at a certain velocity. A triggering system positioned between gun assembly and thrust chamber can initiate the propellant pellet-projectile, and a thrust chamber having a combustion chamber for combustion of propellant pellet-projectile with an exhaust nozzle. Additionally, an auxiliary power system can be used to power the components and various electrical and electronic systems that may be present in the invention for controlling the engine components. The gun assembly may include an ejector mechanism for ejecting the propellant pellets through at least one barrel. The triggering system can produce a medium creating an ambience for the initiation of propellant pellet-projectiles. Methods and systems can be used for space and rocket crafts, turbojets and ramjets.

A real time gamma-ray signature/source identification method and system using principal components analysis (PCA) for transforming and substantially reducing one or more comprehensive spectral libraries of nuclear materials types and configurations into a corresponding concise representation/signature(s) representing and indexing each individual predetermined spectrum in principal component (PC) space, wherein an unknown gamma-ray signature may be compared against the representative signature to find a match or at least characterize the unknown signature from among all the entries in the library with a single regression or simple projection into the PC space, so as to substantially reduce processing time and computing resources and enable real-time characterization and/or identification.

The invention belongs to a stream substrate sludge contamination iron-base composite adsorbing agent in the technical field of restoration of stream substrate sludge. The stream substrate sludge contamination iron-base composite adsorbing agent is composed of a zero-valence iron-base nuclear material, an adhesive material and an adsorbing material, wherein the adhesive material and the adsorbing material respectively contain two components, and the adsorbing material is combined on a zero-valence iron-base nuclear surface through the adhesive material; the adsorbing agent is added into contaminated river substrate sludge and then mechanically stirred and uniformly mixed, a magnetic force recovery device can recover the adsorbing agent after reaction, the later processing is performed, a purpose that the stream substrate sludge is removed is achieved, and the preparation process belongs to a stream substrate sludge in-situ restoration technology. The stream substrate sludge contamination iron-base composite adsorbing agent provided by invention has the advantages that the cost is low, the stream substrate sludge contamination iron-base composite adsorbing agent can be recycled, the specific gravity is large, the adsorbing agent can well sink into a river bottom to adsorb multiple contaminants, and is convenient to use, safe, innocuous and the like.

A portable, hand held, multi-sensor radiation detector is disclosed. The detection apparatus has a plurality of spaced sensor locations which are contained within a flexible housing. The detection apparatus, when suspended from an elevation, will readily assume a substantially straight, vertical orientation and may be used to monitor radiation levels from shipping containers. The flexible detection array can also assume a variety of other orientations to facilitate any unique container shapes or to conform to various physical requirements with respect to deployment of the detection array. The output of each sensor within the array is processed by at least one CPU which provides information in a usable form to a user interface. The user interface is used to provide the power requirements and operating instructions to the operational components within the detection array.

The invention provides a core-shell-structure photomagnetic double-function nano composite material and a preparation method thereof. The preparation method comprises the following steps: preparing an NaGdF4:Yb,Tm upconversion fluorescent nanocrystal nuclear material by high-temperature pyrolysis; coating an active upconversion fluorescent layer made of the same material on the surface of the NaGdF4:Yb,Tm upconversion fluorescent nanocrystal nuclear material by high-temperature pyrolysis; and coating an Fe3O4 magnetic shell on the surface of the core-shell structure by high-temperature pyrolysis to obtain the NaGdF4:Yb,Tm@NaGdF4:Yb,Tm@Fe3O4 core-shell-structure photomagnetic double-function nano composite material. The composite material provided by the invention has strong upconversion luminescence property and magnetic properties; and the middle active fluorescent layer enhances the fluorescence intensity, inhibits the quenching effect between the nuclear material and the strong-magnetism shell material, and improves the fluorescence of the finally prepared photomagnetic double-function composite material of which the particle size is only 20nm or so.

The invention relates to a multi-dimension coupling simulation method for irradiation damage of a nuclear reactor material. According to the method, by combining MD, KMC and CD methods, the respectiveadvantages are achieved, MD is used for simulating a cascade collision process, a simulation result is used as input of KMC, the KMC is used for simulating an annealing process of a cascade defect, asimulation result is used as input of CD, the CD is used for simulating a long-time evolution process of the cascade defect, large-space-time-dimension simulation from defect generation to microcosmic structure representation can be achieved, and accordingly material performance prediction under the service condition is achieved. According to the multi-dimension coupling simulation method, the limit of a single dimension is broken through, long-time and large-scale simulation from atom dimension defect generation of the irradiation damage of the nuclear reactor material to microcosmic structure representation is achieved, the irradiation damage mechanism of the nuclear material can be deeply known, and evolution of a microcosmic structure of an irradiation induction material is predicted.

Radiolabeled conjugates are disclosed which have a component that is effective to target tumor cells, which cells selectively take up and degrade the conjugate, thereby delivering to the tumor cell nucleus a radioisotope capable of being incorporated into the nuclear material, so as to produce a cytotoxic effect and/or to render the cell detectable by radioimaging.